X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/27fb39770f2fa417c5b4ab7feece345741ff99bf..53aa7259bb0612eb48a17d0b954ad71ea37d87a4:/vendor/assets/iD/iD.js

diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index 0d6cbd741..088e252a2 100644
--- a/vendor/assets/iD/iD.js
+++ b/vendor/assets/iD/iD.js
@@ -2,39 +2,24 @@
 
 	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;
-	}
-
-	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;
 	};
 
 	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
-	var global_1 =
-	  // eslint-disable-next-line no-undef
+	var global$1o =
+	  // 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
-	  Function('return this')();
+	  // eslint-disable-next-line no-new-func -- fallback
+	  (function () { return this; })() || Function('return this')();
 
-	var fails = function (exec) {
+	var objectGetOwnPropertyDescriptor = {};
+
+	var fails$V = function (exec) {
 	  try {
 	    return !!exec();
 	  } catch (error) {
@@ -42,29 +27,47 @@
 	  }
 	};
 
-	// Thank's IE8 for his funny defineProperty
-	var descriptors = !fails(function () {
+	var fails$U = fails$V;
+
+	// Detect IE8's incomplete defineProperty implementation
+	var descriptors = !fails$U(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
 	  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
 	});
 
-	var nativePropertyIsEnumerable = {}.propertyIsEnumerable;
-	var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+	var fails$T = fails$V;
+
+	var functionBindNative = !fails$T(function () {
+	  var test = (function () { /* empty */ }).bind();
+	  // eslint-disable-next-line no-prototype-builtins -- safe
+	  return typeof test != 'function' || test.hasOwnProperty('prototype');
+	});
+
+	var NATIVE_BIND$4 = functionBindNative;
+
+	var call$q = Function.prototype.call;
+
+	var functionCall = NATIVE_BIND$4 ? call$q.bind(call$q) : function () {
+	  return call$q.apply(call$q, arguments);
+	};
+
+	var objectPropertyIsEnumerable = {};
+
+	var $propertyIsEnumerable$2 = {}.propertyIsEnumerable;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var getOwnPropertyDescriptor$5 = Object.getOwnPropertyDescriptor;
 
 	// Nashorn ~ JDK8 bug
-	var NASHORN_BUG = getOwnPropertyDescriptor && !nativePropertyIsEnumerable.call({ 1: 2 }, 1);
+	var NASHORN_BUG = getOwnPropertyDescriptor$5 && !$propertyIsEnumerable$2.call({ 1: 2 }, 1);
 
 	// `Object.prototype.propertyIsEnumerable` method implementation
-	// https://tc39.github.io/ecma262/#sec-object.prototype.propertyisenumerable
-	var f = NASHORN_BUG ? function propertyIsEnumerable(V) {
-	  var descriptor = getOwnPropertyDescriptor(this, V);
+	// 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;
-	} : nativePropertyIsEnumerable;
+	} : $propertyIsEnumerable$2;
 
-	var objectPropertyIsEnumerable = {
-		f: f
-	};
-
-	var createPropertyDescriptor = function (bitmap, value) {
+	var createPropertyDescriptor$7 = function (bitmap, value) {
 	  return {
 	    enumerable: !(bitmap & 1),
 	    configurable: !(bitmap & 2),
@@ -73,251 +76,631 @@
 	  };
 	};
 
-	var toString = {}.toString;
+	var NATIVE_BIND$3 = functionBindNative;
+
+	var FunctionPrototype$3 = Function.prototype;
+	var bind$g = FunctionPrototype$3.bind;
+	var call$p = FunctionPrototype$3.call;
+	var uncurryThis$Y = NATIVE_BIND$3 && bind$g.bind(call$p, call$p);
+
+	var functionUncurryThis = NATIVE_BIND$3 ? function (fn) {
+	  return fn && uncurryThis$Y(fn);
+	} : function (fn) {
+	  return fn && function () {
+	    return call$p.apply(fn, arguments);
+	  };
+	};
+
+	var uncurryThis$X = functionUncurryThis;
+
+	var toString$n = uncurryThis$X({}.toString);
+	var stringSlice$c = uncurryThis$X(''.slice);
 
-	var classofRaw = function (it) {
-	  return toString.call(it).slice(8, -1);
+	var classofRaw$1 = function (it) {
+	  return stringSlice$c(toString$n(it), 8, -1);
 	};
 
-	var split = ''.split;
+	var global$1n = global$1o;
+	var uncurryThis$W = functionUncurryThis;
+	var fails$S = fails$V;
+	var classof$e = classofRaw$1;
+
+	var Object$5 = global$1n.Object;
+	var split$4 = uncurryThis$W(''.split);
 
 	// fallback for non-array-like ES3 and non-enumerable old V8 strings
-	var indexedObject = fails(function () {
+	var indexedObject = fails$S(function () {
 	  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
-	  // eslint-disable-next-line no-prototype-builtins
-	  return !Object('z').propertyIsEnumerable(0);
+	  // eslint-disable-next-line no-prototype-builtins -- safe
+	  return !Object$5('z').propertyIsEnumerable(0);
 	}) ? function (it) {
-	  return classofRaw(it) == 'String' ? split.call(it, '') : Object(it);
-	} : Object;
+	  return classof$e(it) == 'String' ? split$4(it, '') : Object$5(it);
+	} : Object$5;
+
+	var global$1m = global$1o;
+
+	var TypeError$p = global$1m.TypeError;
 
 	// `RequireObjectCoercible` abstract operation
-	// https://tc39.github.io/ecma262/#sec-requireobjectcoercible
-	var requireObjectCoercible = function (it) {
-	  if (it == undefined) throw TypeError("Can't call method on " + it);
+	// https://tc39.es/ecma262/#sec-requireobjectcoercible
+	var requireObjectCoercible$e = function (it) {
+	  if (it == undefined) throw TypeError$p("Can't call method on " + it);
 	  return it;
 	};
 
 	// toObject with fallback for non-array-like ES3 strings
+	var IndexedObject$4 = indexedObject;
+	var requireObjectCoercible$d = requireObjectCoercible$e;
+
+	var toIndexedObject$d = function (it) {
+	  return IndexedObject$4(requireObjectCoercible$d(it));
+	};
 
+	// `IsCallable` abstract operation
+	// https://tc39.es/ecma262/#sec-iscallable
+	var isCallable$r = function (argument) {
+	  return typeof argument == 'function';
+	};
 
+	var isCallable$q = isCallable$r;
 
-	var toIndexedObject = function (it) {
-	  return indexedObject(requireObjectCoercible(it));
+	var isObject$s = function (it) {
+	  return typeof it == 'object' ? it !== null : isCallable$q(it);
 	};
 
-	var isObject = function (it) {
-	  return typeof it === 'object' ? it !== null : typeof it === 'function';
+	var global$1l = global$1o;
+	var isCallable$p = isCallable$r;
+
+	var aFunction = function (argument) {
+	  return isCallable$p(argument) ? argument : undefined;
 	};
 
-	// `ToPrimitive` abstract operation
-	// https://tc39.github.io/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 = function (input, PREFERRED_STRING) {
-	  if (!isObject(input)) return input;
+	var getBuiltIn$b = function (namespace, method) {
+	  return arguments.length < 2 ? aFunction(global$1l[namespace]) : global$1l[namespace] && global$1l[namespace][method];
+	};
+
+	var uncurryThis$V = functionUncurryThis;
+
+	var objectIsPrototypeOf = uncurryThis$V({}.isPrototypeOf);
+
+	var getBuiltIn$a = getBuiltIn$b;
+
+	var engineUserAgent = getBuiltIn$a('navigator', 'userAgent') || '';
+
+	var global$1k = global$1o;
+	var userAgent$7 = engineUserAgent;
+
+	var process$4 = global$1k.process;
+	var Deno = global$1k.Deno;
+	var versions = process$4 && process$4.versions || Deno && Deno.version;
+	var v8 = versions && versions.v8;
+	var match, version$1;
+
+	if (v8) {
+	  match = v8.split('.');
+	  // in old Chrome, versions of V8 isn't V8 = Chrome / 10
+	  // but their correct versions are not interesting for us
+	  version$1 = match[0] > 0 && match[0] < 4 ? 1 : +(match[0] + match[1]);
+	}
+
+	// BrowserFS NodeJS `process` polyfill incorrectly set `.v8` to `0.0`
+	// so check `userAgent` even if `.v8` exists, but 0
+	if (!version$1 && userAgent$7) {
+	  match = userAgent$7.match(/Edge\/(\d+)/);
+	  if (!match || match[1] >= 74) {
+	    match = userAgent$7.match(/Chrome\/(\d+)/);
+	    if (match) version$1 = +match[1];
+	  }
+	}
+
+	var engineV8Version = version$1;
+
+	/* eslint-disable es/no-symbol -- required for testing */
+
+	var V8_VERSION$3 = engineV8Version;
+	var fails$R = fails$V;
+
+	// eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
+	var nativeSymbol = !!Object.getOwnPropertySymbols && !fails$R(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;
+	});
+
+	/* eslint-disable es/no-symbol -- required for testing */
+
+	var NATIVE_SYMBOL$3 = nativeSymbol;
+
+	var useSymbolAsUid = NATIVE_SYMBOL$3
+	  && !Symbol.sham
+	  && typeof Symbol.iterator == 'symbol';
+
+	var global$1j = global$1o;
+	var getBuiltIn$9 = getBuiltIn$b;
+	var isCallable$o = isCallable$r;
+	var isPrototypeOf$9 = objectIsPrototypeOf;
+	var USE_SYMBOL_AS_UID$1 = useSymbolAsUid;
+
+	var Object$4 = global$1j.Object;
+
+	var isSymbol$6 = USE_SYMBOL_AS_UID$1 ? function (it) {
+	  return typeof it == 'symbol';
+	} : function (it) {
+	  var $Symbol = getBuiltIn$9('Symbol');
+	  return isCallable$o($Symbol) && isPrototypeOf$9($Symbol.prototype, Object$4(it));
+	};
+
+	var global$1i = global$1o;
+
+	var String$6 = global$1i.String;
+
+	var tryToString$5 = function (argument) {
+	  try {
+	    return String$6(argument);
+	  } catch (error) {
+	    return 'Object';
+	  }
+	};
+
+	var global$1h = global$1o;
+	var isCallable$n = isCallable$r;
+	var tryToString$4 = tryToString$5;
+
+	var TypeError$o = global$1h.TypeError;
+
+	// `Assert: IsCallable(argument) is true`
+	var aCallable$a = function (argument) {
+	  if (isCallable$n(argument)) return argument;
+	  throw TypeError$o(tryToString$4(argument) + ' is not a function');
+	};
+
+	var aCallable$9 = aCallable$a;
+
+	// `GetMethod` abstract operation
+	// https://tc39.es/ecma262/#sec-getmethod
+	var getMethod$7 = function (V, P) {
+	  var func = V[P];
+	  return func == null ? undefined : aCallable$9(func);
+	};
+
+	var global$1g = global$1o;
+	var call$o = functionCall;
+	var isCallable$m = isCallable$r;
+	var isObject$r = isObject$s;
+
+	var TypeError$n = global$1g.TypeError;
+
+	// `OrdinaryToPrimitive` abstract operation
+	// https://tc39.es/ecma262/#sec-ordinarytoprimitive
+	var ordinaryToPrimitive$1 = function (input, pref) {
 	  var fn, val;
-	  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
-	  if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;
-	  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
-	  throw TypeError("Can't convert object to primitive value");
+	  if (pref === 'string' && isCallable$m(fn = input.toString) && !isObject$r(val = call$o(fn, input))) return val;
+	  if (isCallable$m(fn = input.valueOf) && !isObject$r(val = call$o(fn, input))) return val;
+	  if (pref !== 'string' && isCallable$m(fn = input.toString) && !isObject$r(val = call$o(fn, input))) return val;
+	  throw TypeError$n("Can't convert object to primitive value");
+	};
+
+	var shared$5 = {exports: {}};
+
+	var isPure = false;
+
+	var global$1f = global$1o;
+
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	var defineProperty$d = Object.defineProperty;
+
+	var setGlobal$3 = function (key, value) {
+	  try {
+	    defineProperty$d(global$1f, key, { value: value, configurable: true, writable: true });
+	  } catch (error) {
+	    global$1f[key] = value;
+	  } return value;
+	};
+
+	var global$1e = global$1o;
+	var setGlobal$2 = setGlobal$3;
+
+	var SHARED = '__core-js_shared__';
+	var store$4 = global$1e[SHARED] || setGlobal$2(SHARED, {});
+
+	var sharedStore = store$4;
+
+	var store$3 = sharedStore;
+
+	(shared$5.exports = function (key, value) {
+	  return store$3[key] || (store$3[key] = value !== undefined ? value : {});
+	})('versions', []).push({
+	  version: '3.21.0',
+	  mode: 'global',
+	  copyright: '© 2014-2022 Denis Pushkarev (zloirock.ru)',
+	  license: 'https://github.com/zloirock/core-js/blob/v3.21.0/LICENSE',
+	  source: 'https://github.com/zloirock/core-js'
+	});
+
+	var global$1d = global$1o;
+	var requireObjectCoercible$c = requireObjectCoercible$e;
+
+	var Object$3 = global$1d.Object;
+
+	// `ToObject` abstract operation
+	// https://tc39.es/ecma262/#sec-toobject
+	var toObject$i = function (argument) {
+	  return Object$3(requireObjectCoercible$c(argument));
+	};
+
+	var uncurryThis$U = functionUncurryThis;
+	var toObject$h = toObject$i;
+
+	var hasOwnProperty$3 = uncurryThis$U({}.hasOwnProperty);
+
+	// `HasOwnProperty` abstract operation
+	// https://tc39.es/ecma262/#sec-hasownproperty
+	var hasOwnProperty_1 = Object.hasOwn || function hasOwn(it, key) {
+	  return hasOwnProperty$3(toObject$h(it), key);
+	};
+
+	var uncurryThis$T = functionUncurryThis;
+
+	var id$2 = 0;
+	var postfix = Math.random();
+	var toString$m = uncurryThis$T(1.0.toString);
+
+	var uid$5 = function (key) {
+	  return 'Symbol(' + (key === undefined ? '' : key) + ')_' + toString$m(++id$2 + postfix, 36);
+	};
+
+	var global$1c = global$1o;
+	var shared$4 = shared$5.exports;
+	var hasOwn$l = hasOwnProperty_1;
+	var uid$4 = uid$5;
+	var NATIVE_SYMBOL$2 = nativeSymbol;
+	var USE_SYMBOL_AS_UID = useSymbolAsUid;
+
+	var WellKnownSymbolsStore$1 = shared$4('wks');
+	var Symbol$3 = global$1c.Symbol;
+	var symbolFor = Symbol$3 && Symbol$3['for'];
+	var createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol$3 : Symbol$3 && Symbol$3.withoutSetter || uid$4;
+
+	var wellKnownSymbol$t = function (name) {
+	  if (!hasOwn$l(WellKnownSymbolsStore$1, name) || !(NATIVE_SYMBOL$2 || typeof WellKnownSymbolsStore$1[name] == 'string')) {
+	    var description = 'Symbol.' + name;
+	    if (NATIVE_SYMBOL$2 && hasOwn$l(Symbol$3, name)) {
+	      WellKnownSymbolsStore$1[name] = Symbol$3[name];
+	    } else if (USE_SYMBOL_AS_UID && symbolFor) {
+	      WellKnownSymbolsStore$1[name] = symbolFor(description);
+	    } else {
+	      WellKnownSymbolsStore$1[name] = createWellKnownSymbol(description);
+	    }
+	  } return WellKnownSymbolsStore$1[name];
+	};
+
+	var global$1b = global$1o;
+	var call$n = functionCall;
+	var isObject$q = isObject$s;
+	var isSymbol$5 = isSymbol$6;
+	var getMethod$6 = getMethod$7;
+	var ordinaryToPrimitive = ordinaryToPrimitive$1;
+	var wellKnownSymbol$s = wellKnownSymbol$t;
+
+	var TypeError$m = global$1b.TypeError;
+	var TO_PRIMITIVE$1 = wellKnownSymbol$s('toPrimitive');
+
+	// `ToPrimitive` abstract operation
+	// https://tc39.es/ecma262/#sec-toprimitive
+	var toPrimitive$3 = function (input, pref) {
+	  if (!isObject$q(input) || isSymbol$5(input)) return input;
+	  var exoticToPrim = getMethod$6(input, TO_PRIMITIVE$1);
+	  var result;
+	  if (exoticToPrim) {
+	    if (pref === undefined) pref = 'default';
+	    result = call$n(exoticToPrim, input, pref);
+	    if (!isObject$q(result) || isSymbol$5(result)) return result;
+	    throw TypeError$m("Can't convert object to primitive value");
+	  }
+	  if (pref === undefined) pref = 'number';
+	  return ordinaryToPrimitive(input, pref);
 	};
 
-	var hasOwnProperty = {}.hasOwnProperty;
+	var toPrimitive$2 = toPrimitive$3;
+	var isSymbol$4 = isSymbol$6;
 
-	var has = function (it, key) {
-	  return hasOwnProperty.call(it, key);
+	// `ToPropertyKey` abstract operation
+	// https://tc39.es/ecma262/#sec-topropertykey
+	var toPropertyKey$5 = function (argument) {
+	  var key = toPrimitive$2(argument, 'string');
+	  return isSymbol$4(key) ? key : key + '';
 	};
 
-	var document$1 = global_1.document;
+	var global$1a = global$1o;
+	var isObject$p = isObject$s;
+
+	var document$3 = global$1a.document;
 	// typeof document.createElement is 'object' in old IE
-	var EXISTS = isObject(document$1) && isObject(document$1.createElement);
+	var EXISTS$1 = isObject$p(document$3) && isObject$p(document$3.createElement);
 
-	var documentCreateElement = function (it) {
-	  return EXISTS ? document$1.createElement(it) : {};
+	var documentCreateElement$2 = function (it) {
+	  return EXISTS$1 ? document$3.createElement(it) : {};
 	};
 
-	// Thank's IE8 for his funny defineProperty
-	var ie8DomDefine = !descriptors && !fails(function () {
-	  return Object.defineProperty(documentCreateElement('div'), 'a', {
+	var DESCRIPTORS$p = descriptors;
+	var fails$Q = fails$V;
+	var createElement$1 = documentCreateElement$2;
+
+	// Thanks to IE8 for its funny defineProperty
+	var ie8DomDefine = !DESCRIPTORS$p && !fails$Q(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	  return Object.defineProperty(createElement$1('div'), 'a', {
 	    get: function () { return 7; }
 	  }).a != 7;
 	});
 
-	var nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+	var DESCRIPTORS$o = descriptors;
+	var call$m = functionCall;
+	var propertyIsEnumerableModule$2 = objectPropertyIsEnumerable;
+	var createPropertyDescriptor$6 = createPropertyDescriptor$7;
+	var toIndexedObject$c = toIndexedObject$d;
+	var toPropertyKey$4 = toPropertyKey$5;
+	var hasOwn$k = hasOwnProperty_1;
+	var IE8_DOM_DEFINE$1 = ie8DomDefine;
+
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var $getOwnPropertyDescriptor$2 = Object.getOwnPropertyDescriptor;
 
 	// `Object.getOwnPropertyDescriptor` method
-	// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
-	var f$1 = descriptors ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {
-	  O = toIndexedObject(O);
-	  P = toPrimitive(P, true);
-	  if (ie8DomDefine) try {
-	    return nativeGetOwnPropertyDescriptor(O, P);
+	// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+	objectGetOwnPropertyDescriptor.f = DESCRIPTORS$o ? $getOwnPropertyDescriptor$2 : function getOwnPropertyDescriptor(O, P) {
+	  O = toIndexedObject$c(O);
+	  P = toPropertyKey$4(P);
+	  if (IE8_DOM_DEFINE$1) try {
+	    return $getOwnPropertyDescriptor$2(O, P);
 	  } catch (error) { /* empty */ }
-	  if (has(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
+	  if (hasOwn$k(O, P)) return createPropertyDescriptor$6(!call$m(propertyIsEnumerableModule$2.f, O, P), O[P]);
 	};
 
-	var objectGetOwnPropertyDescriptor = {
-		f: f$1
-	};
+	var objectDefineProperty = {};
 
-	var anObject = function (it) {
-	  if (!isObject(it)) {
-	    throw TypeError(String(it) + ' is not an object');
-	  } return it;
+	var DESCRIPTORS$n = descriptors;
+	var fails$P = fails$V;
+
+	// V8 ~ Chrome 36-
+	// https://bugs.chromium.org/p/v8/issues/detail?id=3334
+	var v8PrototypeDefineBug = DESCRIPTORS$n && fails$P(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	  return Object.defineProperty(function () { /* empty */ }, 'prototype', {
+	    value: 42,
+	    writable: false
+	  }).prototype != 42;
+	});
+
+	var global$19 = global$1o;
+	var isObject$o = isObject$s;
+
+	var String$5 = global$19.String;
+	var TypeError$l = global$19.TypeError;
+
+	// `Assert: Type(argument) is Object`
+	var anObject$n = function (argument) {
+	  if (isObject$o(argument)) return argument;
+	  throw TypeError$l(String$5(argument) + ' is not an object');
 	};
 
-	var nativeDefineProperty = Object.defineProperty;
+	var global$18 = global$1o;
+	var DESCRIPTORS$m = descriptors;
+	var IE8_DOM_DEFINE = ie8DomDefine;
+	var V8_PROTOTYPE_DEFINE_BUG$1 = v8PrototypeDefineBug;
+	var anObject$m = anObject$n;
+	var toPropertyKey$3 = toPropertyKey$5;
+
+	var TypeError$k = global$18.TypeError;
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	var $defineProperty$1 = Object.defineProperty;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;
+	var ENUMERABLE = 'enumerable';
+	var CONFIGURABLE$1 = 'configurable';
+	var WRITABLE = 'writable';
 
 	// `Object.defineProperty` method
-	// https://tc39.github.io/ecma262/#sec-object.defineproperty
-	var f$2 = descriptors ? nativeDefineProperty : function defineProperty(O, P, Attributes) {
-	  anObject(O);
-	  P = toPrimitive(P, true);
-	  anObject(Attributes);
-	  if (ie8DomDefine) try {
-	    return nativeDefineProperty(O, P, Attributes);
+	// https://tc39.es/ecma262/#sec-object.defineproperty
+	objectDefineProperty.f = DESCRIPTORS$m ? V8_PROTOTYPE_DEFINE_BUG$1 ? function defineProperty(O, P, Attributes) {
+	  anObject$m(O);
+	  P = toPropertyKey$3(P);
+	  anObject$m(Attributes);
+	  if (typeof O === 'function' && P === 'prototype' && 'value' in Attributes && WRITABLE in Attributes && !Attributes[WRITABLE]) {
+	    var current = $getOwnPropertyDescriptor$1(O, P);
+	    if (current && current[WRITABLE]) {
+	      O[P] = Attributes.value;
+	      Attributes = {
+	        configurable: CONFIGURABLE$1 in Attributes ? Attributes[CONFIGURABLE$1] : current[CONFIGURABLE$1],
+	        enumerable: ENUMERABLE in Attributes ? Attributes[ENUMERABLE] : current[ENUMERABLE],
+	        writable: false
+	      };
+	    }
+	  } return $defineProperty$1(O, P, Attributes);
+	} : $defineProperty$1 : function defineProperty(O, P, Attributes) {
+	  anObject$m(O);
+	  P = toPropertyKey$3(P);
+	  anObject$m(Attributes);
+	  if (IE8_DOM_DEFINE) try {
+	    return $defineProperty$1(O, P, Attributes);
 	  } catch (error) { /* empty */ }
-	  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
+	  if ('get' in Attributes || 'set' in Attributes) throw TypeError$k('Accessors not supported');
 	  if ('value' in Attributes) O[P] = Attributes.value;
 	  return O;
 	};
 
-	var objectDefineProperty = {
-		f: f$2
-	};
+	var DESCRIPTORS$l = descriptors;
+	var definePropertyModule$7 = objectDefineProperty;
+	var createPropertyDescriptor$5 = createPropertyDescriptor$7;
 
-	var createNonEnumerableProperty = descriptors ? function (object, key, value) {
-	  return objectDefineProperty.f(object, key, createPropertyDescriptor(1, value));
+	var createNonEnumerableProperty$b = DESCRIPTORS$l ? function (object, key, value) {
+	  return definePropertyModule$7.f(object, key, createPropertyDescriptor$5(1, value));
 	} : function (object, key, value) {
 	  object[key] = value;
 	  return object;
 	};
 
-	var setGlobal = function (key, value) {
-	  try {
-	    createNonEnumerableProperty(global_1, key, value);
-	  } catch (error) {
-	    global_1[key] = value;
-	  } return value;
-	};
-
-	var SHARED = '__core-js_shared__';
-	var store = global_1[SHARED] || setGlobal(SHARED, {});
+	var redefine$h = {exports: {}};
 
-	var sharedStore = store;
+	var uncurryThis$S = functionUncurryThis;
+	var isCallable$l = isCallable$r;
+	var store$2 = sharedStore;
 
-	var functionToString = Function.toString;
+	var functionToString$1 = uncurryThis$S(Function.toString);
 
-	// this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper
-	if (typeof sharedStore.inspectSource != 'function') {
-	  sharedStore.inspectSource = function (it) {
-	    return functionToString.call(it);
+	// this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
+	if (!isCallable$l(store$2.inspectSource)) {
+	  store$2.inspectSource = function (it) {
+	    return functionToString$1(it);
 	  };
 	}
 
-	var inspectSource = sharedStore.inspectSource;
+	var inspectSource$4 = store$2.inspectSource;
 
-	var WeakMap = global_1.WeakMap;
+	var global$17 = global$1o;
+	var isCallable$k = isCallable$r;
+	var inspectSource$3 = inspectSource$4;
 
-	var nativeWeakMap = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));
+	var WeakMap$1 = global$17.WeakMap;
 
-	var isPure = false;
+	var nativeWeakMap = isCallable$k(WeakMap$1) && /native code/.test(inspectSource$3(WeakMap$1));
 
-	var shared = createCommonjsModule(function (module) {
-	(module.exports = function (key, value) {
-	  return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
-	})('versions', []).push({
-	  version: '3.6.5',
-	  mode:  'global',
-	  copyright: '© 2020 Denis Pushkarev (zloirock.ru)'
-	});
-	});
+	var shared$3 = shared$5.exports;
+	var uid$3 = uid$5;
 
-	var id = 0;
-	var postfix = Math.random();
+	var keys$3 = shared$3('keys');
 
-	var uid = function (key) {
-	  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);
+	var sharedKey$4 = function (key) {
+	  return keys$3[key] || (keys$3[key] = uid$3(key));
 	};
 
-	var keys = shared('keys');
-
-	var sharedKey = function (key) {
-	  return keys[key] || (keys[key] = uid(key));
-	};
+	var hiddenKeys$6 = {};
 
-	var hiddenKeys = {};
+	var NATIVE_WEAK_MAP = nativeWeakMap;
+	var global$16 = global$1o;
+	var uncurryThis$R = functionUncurryThis;
+	var isObject$n = isObject$s;
+	var createNonEnumerableProperty$a = createNonEnumerableProperty$b;
+	var hasOwn$j = hasOwnProperty_1;
+	var shared$2 = sharedStore;
+	var sharedKey$3 = sharedKey$4;
+	var hiddenKeys$5 = hiddenKeys$6;
 
-	var WeakMap$1 = global_1.WeakMap;
-	var set, get, has$1;
+	var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+	var TypeError$j = global$16.TypeError;
+	var WeakMap = global$16.WeakMap;
+	var set$4, get$5, has;
 
 	var enforce = function (it) {
-	  return has$1(it) ? get(it) : set(it, {});
+	  return has(it) ? get$5(it) : set$4(it, {});
 	};
 
 	var getterFor = function (TYPE) {
 	  return function (it) {
 	    var state;
-	    if (!isObject(it) || (state = get(it)).type !== TYPE) {
-	      throw TypeError('Incompatible receiver, ' + TYPE + ' required');
+	    if (!isObject$n(it) || (state = get$5(it)).type !== TYPE) {
+	      throw TypeError$j('Incompatible receiver, ' + TYPE + ' required');
 	    } return state;
 	  };
 	};
 
-	if (nativeWeakMap) {
-	  var store$1 = new WeakMap$1();
-	  var wmget = store$1.get;
-	  var wmhas = store$1.has;
-	  var wmset = store$1.set;
-	  set = function (it, metadata) {
-	    wmset.call(store$1, it, metadata);
+	if (NATIVE_WEAK_MAP || shared$2.state) {
+	  var store$1 = shared$2.state || (shared$2.state = new WeakMap());
+	  var wmget = uncurryThis$R(store$1.get);
+	  var wmhas = uncurryThis$R(store$1.has);
+	  var wmset = uncurryThis$R(store$1.set);
+	  set$4 = function (it, metadata) {
+	    if (wmhas(store$1, it)) throw new TypeError$j(OBJECT_ALREADY_INITIALIZED);
+	    metadata.facade = it;
+	    wmset(store$1, it, metadata);
 	    return metadata;
 	  };
-	  get = function (it) {
-	    return wmget.call(store$1, it) || {};
+	  get$5 = function (it) {
+	    return wmget(store$1, it) || {};
 	  };
-	  has$1 = function (it) {
-	    return wmhas.call(store$1, it);
+	  has = function (it) {
+	    return wmhas(store$1, it);
 	  };
 	} else {
-	  var STATE = sharedKey('state');
-	  hiddenKeys[STATE] = true;
-	  set = function (it, metadata) {
-	    createNonEnumerableProperty(it, STATE, metadata);
+	  var STATE = sharedKey$3('state');
+	  hiddenKeys$5[STATE] = true;
+	  set$4 = function (it, metadata) {
+	    if (hasOwn$j(it, STATE)) throw new TypeError$j(OBJECT_ALREADY_INITIALIZED);
+	    metadata.facade = it;
+	    createNonEnumerableProperty$a(it, STATE, metadata);
 	    return metadata;
 	  };
-	  get = function (it) {
-	    return has(it, STATE) ? it[STATE] : {};
+	  get$5 = function (it) {
+	    return hasOwn$j(it, STATE) ? it[STATE] : {};
 	  };
-	  has$1 = function (it) {
-	    return has(it, STATE);
+	  has = function (it) {
+	    return hasOwn$j(it, STATE);
 	  };
 	}
 
 	var internalState = {
-	  set: set,
-	  get: get,
-	  has: has$1,
+	  set: set$4,
+	  get: get$5,
+	  has: has,
 	  enforce: enforce,
 	  getterFor: getterFor
 	};
 
-	var redefine = createCommonjsModule(function (module) {
-	var getInternalState = internalState.get;
-	var enforceInternalState = internalState.enforce;
+	var DESCRIPTORS$k = descriptors;
+	var hasOwn$i = hasOwnProperty_1;
+
+	var FunctionPrototype$2 = Function.prototype;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var getDescriptor = DESCRIPTORS$k && Object.getOwnPropertyDescriptor;
+
+	var EXISTS = hasOwn$i(FunctionPrototype$2, 'name');
+	// additional protection from minified / mangled / dropped function names
+	var PROPER = EXISTS && (function something() { /* empty */ }).name === 'something';
+	var CONFIGURABLE = EXISTS && (!DESCRIPTORS$k || (DESCRIPTORS$k && getDescriptor(FunctionPrototype$2, 'name').configurable));
+
+	var functionName = {
+	  EXISTS: EXISTS,
+	  PROPER: PROPER,
+	  CONFIGURABLE: CONFIGURABLE
+	};
+
+	var global$15 = global$1o;
+	var isCallable$j = isCallable$r;
+	var hasOwn$h = hasOwnProperty_1;
+	var createNonEnumerableProperty$9 = createNonEnumerableProperty$b;
+	var setGlobal$1 = setGlobal$3;
+	var inspectSource$2 = inspectSource$4;
+	var InternalStateModule$9 = internalState;
+	var CONFIGURABLE_FUNCTION_NAME$2 = functionName.CONFIGURABLE;
+
+	var getInternalState$7 = InternalStateModule$9.get;
+	var enforceInternalState$1 = InternalStateModule$9.enforce;
 	var TEMPLATE = String(String).split('String');
 
-	(module.exports = function (O, key, value, options) {
+	(redefine$h.exports = function (O, key, value, options) {
 	  var unsafe = options ? !!options.unsafe : false;
 	  var simple = options ? !!options.enumerable : false;
 	  var noTargetGet = options ? !!options.noTargetGet : false;
-	  if (typeof value == 'function') {
-	    if (typeof key == 'string' && !has(value, 'name')) createNonEnumerableProperty(value, 'name', key);
-	    enforceInternalState(value).source = TEMPLATE.join(typeof key == 'string' ? key : '');
+	  var name = options && options.name !== undefined ? options.name : key;
+	  var state;
+	  if (isCallable$j(value)) {
+	    if (String(name).slice(0, 7) === 'Symbol(') {
+	      name = '[' + String(name).replace(/^Symbol\(([^)]*)\)/, '$1') + ']';
+	    }
+	    if (!hasOwn$h(value, 'name') || (CONFIGURABLE_FUNCTION_NAME$2 && value.name !== name)) {
+	      createNonEnumerableProperty$9(value, 'name', name);
+	    }
+	    state = enforceInternalState$1(value);
+	    if (!state.source) {
+	      state.source = TEMPLATE.join(typeof name == 'string' ? name : '');
+	    }
 	  }
-	  if (O === global_1) {
+	  if (O === global$15) {
 	    if (simple) O[key] = value;
-	    else setGlobal(key, value);
+	    else setGlobal$1(key, value);
 	    return;
 	  } else if (!unsafe) {
 	    delete O[key];
@@ -325,64 +708,72 @@
 	    simple = true;
 	  }
 	  if (simple) O[key] = value;
-	  else createNonEnumerableProperty(O, key, value);
+	  else createNonEnumerableProperty$9(O, key, value);
 	// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
 	})(Function.prototype, 'toString', function toString() {
-	  return typeof this == 'function' && getInternalState(this).source || inspectSource(this);
-	});
+	  return isCallable$j(this) && getInternalState$7(this).source || inspectSource$2(this);
 	});
 
-	var path = global_1;
+	var objectGetOwnPropertyNames = {};
 
-	var aFunction = function (variable) {
-	  return typeof variable == 'function' ? variable : undefined;
+	var ceil$1 = Math.ceil;
+	var floor$8 = Math.floor;
+
+	// `ToIntegerOrInfinity` abstract operation
+	// https://tc39.es/ecma262/#sec-tointegerorinfinity
+	var toIntegerOrInfinity$b = function (argument) {
+	  var number = +argument;
+	  // eslint-disable-next-line no-self-compare -- safe
+	  return number !== number || number === 0 ? 0 : (number > 0 ? floor$8 : ceil$1)(number);
 	};
 
-	var getBuiltIn = function (namespace, method) {
-	  return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global_1[namespace])
-	    : path[namespace] && path[namespace][method] || global_1[namespace] && global_1[namespace][method];
-	};
+	var toIntegerOrInfinity$a = toIntegerOrInfinity$b;
 
-	var ceil = Math.ceil;
-	var floor = Math.floor;
+	var max$5 = Math.max;
+	var min$9 = Math.min;
 
-	// `ToInteger` abstract operation
-	// https://tc39.github.io/ecma262/#sec-tointeger
-	var toInteger = function (argument) {
-	  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);
+	// 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$9 = function (index, length) {
+	  var integer = toIntegerOrInfinity$a(index);
+	  return integer < 0 ? max$5(integer + length, 0) : min$9(integer, length);
 	};
 
-	var min = Math.min;
+	var toIntegerOrInfinity$9 = toIntegerOrInfinity$b;
+
+	var min$8 = Math.min;
 
 	// `ToLength` abstract operation
-	// https://tc39.github.io/ecma262/#sec-tolength
-	var toLength = function (argument) {
-	  return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
+	// https://tc39.es/ecma262/#sec-tolength
+	var toLength$c = function (argument) {
+	  return argument > 0 ? min$8(toIntegerOrInfinity$9(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
 	};
 
-	var max = Math.max;
-	var min$1 = Math.min;
+	var toLength$b = toLength$c;
 
-	// 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 = function (index, length) {
-	  var integer = toInteger(index);
-	  return integer < 0 ? max(integer + length, 0) : min$1(integer, length);
+	// `LengthOfArrayLike` abstract operation
+	// https://tc39.es/ecma262/#sec-lengthofarraylike
+	var lengthOfArrayLike$i = function (obj) {
+	  return toLength$b(obj.length);
 	};
 
+	var toIndexedObject$b = toIndexedObject$d;
+	var toAbsoluteIndex$8 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$h = lengthOfArrayLike$i;
+
 	// `Array.prototype.{ indexOf, includes }` methods implementation
-	var createMethod = function (IS_INCLUDES) {
+	var createMethod$6 = function (IS_INCLUDES) {
 	  return function ($this, el, fromIndex) {
-	    var O = toIndexedObject($this);
-	    var length = toLength(O.length);
-	    var index = toAbsoluteIndex(fromIndex, length);
+	    var O = toIndexedObject$b($this);
+	    var length = lengthOfArrayLike$h(O);
+	    var index = toAbsoluteIndex$8(fromIndex, length);
 	    var value;
 	    // Array#includes uses SameValueZero equality algorithm
-	    // eslint-disable-next-line no-self-compare
+	    // 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
+	      // 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++) {
@@ -393,31 +784,36 @@
 
 	var arrayIncludes = {
 	  // `Array.prototype.includes` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.includes
-	  includes: createMethod(true),
+	  // https://tc39.es/ecma262/#sec-array.prototype.includes
+	  includes: createMethod$6(true),
 	  // `Array.prototype.indexOf` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.indexof
-	  indexOf: createMethod(false)
+	  // https://tc39.es/ecma262/#sec-array.prototype.indexof
+	  indexOf: createMethod$6(false)
 	};
 
-	var indexOf = arrayIncludes.indexOf;
+	var uncurryThis$Q = functionUncurryThis;
+	var hasOwn$g = hasOwnProperty_1;
+	var toIndexedObject$a = toIndexedObject$d;
+	var indexOf$1 = arrayIncludes.indexOf;
+	var hiddenKeys$4 = hiddenKeys$6;
 
+	var push$a = uncurryThis$Q([].push);
 
 	var objectKeysInternal = function (object, names) {
-	  var O = toIndexedObject(object);
+	  var O = toIndexedObject$a(object);
 	  var i = 0;
 	  var result = [];
 	  var key;
-	  for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);
+	  for (key in O) !hasOwn$g(hiddenKeys$4, key) && hasOwn$g(O, key) && push$a(result, key);
 	  // Don't enum bug & hidden keys
-	  while (names.length > i) if (has(O, key = names[i++])) {
-	    ~indexOf(result, key) || result.push(key);
+	  while (names.length > i) if (hasOwn$g(O, key = names[i++])) {
+	    ~indexOf$1(result, key) || push$a(result, key);
 	  }
 	  return result;
 	};
 
 	// IE8- don't enum bug keys
-	var enumBugKeys = [
+	var enumBugKeys$3 = [
 	  'constructor',
 	  'hasOwnProperty',
 	  'isPrototypeOf',
@@ -427,67 +823,85 @@
 	  'valueOf'
 	];
 
-	var hiddenKeys$1 = enumBugKeys.concat('length', 'prototype');
+	var internalObjectKeys$1 = objectKeysInternal;
+	var enumBugKeys$2 = enumBugKeys$3;
+
+	var hiddenKeys$3 = enumBugKeys$2.concat('length', 'prototype');
 
 	// `Object.getOwnPropertyNames` method
-	// https://tc39.github.io/ecma262/#sec-object.getownpropertynames
-	var f$3 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
-	  return objectKeysInternal(O, hiddenKeys$1);
+	// 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);
 	};
 
-	var objectGetOwnPropertyNames = {
-		f: f$3
-	};
+	var objectGetOwnPropertySymbols = {};
 
-	var f$4 = Object.getOwnPropertySymbols;
+	// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
+	objectGetOwnPropertySymbols.f = Object.getOwnPropertySymbols;
 
-	var objectGetOwnPropertySymbols = {
-		f: f$4
-	};
+	var getBuiltIn$8 = getBuiltIn$b;
+	var uncurryThis$P = functionUncurryThis;
+	var getOwnPropertyNamesModule$2 = objectGetOwnPropertyNames;
+	var getOwnPropertySymbolsModule$2 = objectGetOwnPropertySymbols;
+	var anObject$l = anObject$n;
+
+	var concat$3 = uncurryThis$P([].concat);
 
 	// all object keys, includes non-enumerable and symbols
-	var ownKeys = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {
-	  var keys = objectGetOwnPropertyNames.f(anObject(it));
-	  var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
-	  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;
+	var ownKeys$1 = getBuiltIn$8('Reflect', 'ownKeys') || function ownKeys(it) {
+	  var keys = getOwnPropertyNamesModule$2.f(anObject$l(it));
+	  var getOwnPropertySymbols = getOwnPropertySymbolsModule$2.f;
+	  return getOwnPropertySymbols ? concat$3(keys, getOwnPropertySymbols(it)) : keys;
 	};
 
-	var copyConstructorProperties = function (target, source) {
+	var hasOwn$f = hasOwnProperty_1;
+	var ownKeys = ownKeys$1;
+	var getOwnPropertyDescriptorModule$3 = objectGetOwnPropertyDescriptor;
+	var definePropertyModule$6 = objectDefineProperty;
+
+	var copyConstructorProperties$2 = function (target, source, exceptions) {
 	  var keys = ownKeys(source);
-	  var defineProperty = objectDefineProperty.f;
-	  var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	  var defineProperty = definePropertyModule$6.f;
+	  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule$3.f;
 	  for (var i = 0; i < keys.length; i++) {
 	    var key = keys[i];
-	    if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+	    if (!hasOwn$f(target, key) && !(exceptions && hasOwn$f(exceptions, key))) {
+	      defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+	    }
 	  }
 	};
 
+	var fails$O = fails$V;
+	var isCallable$i = isCallable$r;
+
 	var replacement = /#|\.prototype\./;
 
-	var isForced = function (feature, detection) {
-	  var value = data[normalize(feature)];
+	var isForced$5 = function (feature, detection) {
+	  var value = data[normalize$1(feature)];
 	  return value == POLYFILL ? true
 	    : value == NATIVE ? false
-	    : typeof detection == 'function' ? fails(detection)
+	    : isCallable$i(detection) ? fails$O(detection)
 	    : !!detection;
 	};
 
-	var normalize = isForced.normalize = function (string) {
+	var normalize$1 = isForced$5.normalize = function (string) {
 	  return String(string).replace(replacement, '.').toLowerCase();
 	};
 
-	var data = isForced.data = {};
-	var NATIVE = isForced.NATIVE = 'N';
-	var POLYFILL = isForced.POLYFILL = 'P';
-
-	var isForced_1 = isForced;
-
-	var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
-
-
-
+	var data = isForced$5.data = {};
+	var NATIVE = isForced$5.NATIVE = 'N';
+	var POLYFILL = isForced$5.POLYFILL = 'P';
 
+	var isForced_1 = isForced$5;
 
+	var global$14 = global$1o;
+	var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+	var createNonEnumerableProperty$8 = createNonEnumerableProperty$b;
+	var redefine$g = redefine$h.exports;
+	var setGlobal = setGlobal$3;
+	var copyConstructorProperties$1 = copyConstructorProperties$2;
+	var isForced$4 = isForced_1;
 
 	/*
 	  options.target      - name of the target object
@@ -502,6 +916,7 @@
 	  options.sham        - add a flag to not completely full polyfills
 	  options.enumerable  - export as enumerable property
 	  options.noTargetGet - prevent calling a getter on target
+	  options.name        - the .name of the function if it does not match the key
 	*/
 	var _export = function (options, source) {
 	  var TARGET = options.target;
@@ -509,106 +924,338 @@
 	  var STATIC = options.stat;
 	  var FORCED, target, key, targetProperty, sourceProperty, descriptor;
 	  if (GLOBAL) {
-	    target = global_1;
+	    target = global$14;
 	  } else if (STATIC) {
-	    target = global_1[TARGET] || setGlobal(TARGET, {});
+	    target = global$14[TARGET] || setGlobal(TARGET, {});
 	  } else {
-	    target = (global_1[TARGET] || {}).prototype;
+	    target = (global$14[TARGET] || {}).prototype;
 	  }
 	  if (target) for (key in source) {
 	    sourceProperty = source[key];
 	    if (options.noTargetGet) {
-	      descriptor = getOwnPropertyDescriptor$1(target, key);
+	      descriptor = getOwnPropertyDescriptor$4(target, key);
 	      targetProperty = descriptor && descriptor.value;
 	    } else targetProperty = target[key];
-	    FORCED = isForced_1(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
+	    FORCED = isForced$4(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
 	    // contained in target
 	    if (!FORCED && targetProperty !== undefined) {
-	      if (typeof sourceProperty === typeof targetProperty) continue;
-	      copyConstructorProperties(sourceProperty, targetProperty);
+	      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(sourceProperty, 'sham', true);
+	      createNonEnumerableProperty$8(sourceProperty, 'sham', true);
 	    }
 	    // extend global
-	    redefine(target, key, sourceProperty, options);
+	    redefine$g(target, key, sourceProperty, options);
 	  }
 	};
 
+	var $$1e = _export;
+	var global$13 = global$1o;
+	var uncurryThis$O = functionUncurryThis;
+
+	var Date$1 = global$13.Date;
+	var getTime$2 = uncurryThis$O(Date$1.prototype.getTime);
+
 	// `Date.now` method
-	// https://tc39.github.io/ecma262/#sec-date.now
-	_export({ target: 'Date', stat: true }, {
+	// https://tc39.es/ecma262/#sec-date.now
+	$$1e({ target: 'Date', stat: true }, {
 	  now: function now() {
-	    return new Date().getTime();
+	    return getTime$2(new Date$1());
 	  }
 	});
 
-	var DatePrototype = Date.prototype;
+	var uncurryThis$N = functionUncurryThis;
+	var redefine$f = redefine$h.exports;
+
+	var DatePrototype$1 = Date.prototype;
 	var INVALID_DATE = 'Invalid Date';
-	var TO_STRING = 'toString';
-	var nativeDateToString = DatePrototype[TO_STRING];
-	var getTime = DatePrototype.getTime;
+	var TO_STRING$1 = 'toString';
+	var un$DateToString = uncurryThis$N(DatePrototype$1[TO_STRING$1]);
+	var getTime$1 = uncurryThis$N(DatePrototype$1.getTime);
 
 	// `Date.prototype.toString` method
-	// https://tc39.github.io/ecma262/#sec-date.prototype.tostring
-	if (new Date(NaN) + '' != INVALID_DATE) {
-	  redefine(DatePrototype, TO_STRING, function toString() {
-	    var value = getTime.call(this);
-	    // eslint-disable-next-line no-self-compare
-	    return value === value ? nativeDateToString.call(this) : INVALID_DATE;
+	// https://tc39.es/ecma262/#sec-date.prototype.tostring
+	if (String(new Date(NaN)) != INVALID_DATE) {
+	  redefine$f(DatePrototype$1, TO_STRING$1, function toString() {
+	    var value = getTime$1(this);
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    return value === value ? un$DateToString(this) : INVALID_DATE;
 	  });
 	}
 
-	var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
-	  // Chrome 38 Symbol has incorrect toString conversion
-	  // eslint-disable-next-line no-undef
-	  return !String(Symbol());
+	function _typeof(obj) {
+	  "@babel/helpers - typeof";
+
+	  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+	    return typeof obj;
+	  } : function (obj) {
+	    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+	  }, _typeof(obj);
+	}
+
+	function _classCallCheck$1(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
+
+	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);
+	  }
+	}
+
+	function _createClass$1(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties$1(Constructor, staticProps);
+	  Object.defineProperty(Constructor, "prototype", {
+	    writable: false
+	  });
+	  return 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;
+	  }
+
+	  return obj;
+	}
+
+	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);
+	}
+
+	function _arrayWithHoles(arr) {
+	  if (Array.isArray(arr)) return arr;
+	}
+
+	function _iterableToArray(iter) {
+	  if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
+	}
+
+	function _iterableToArrayLimit(arr, i) {
+	  var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];
+
+	  if (_i == null) return;
+	  var _arr = [];
+	  var _n = true;
+	  var _d = false;
+
+	  var _s, _e;
+
+	  try {
+	    for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
+	      _arr.push(_s.value);
+
+	      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;
+	    }
+	  }
+
+	  return _arr;
+	}
+
+	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);
+	}
+
+	function _arrayLikeToArray(arr, len) {
+	  if (len == null || len > arr.length) len = arr.length;
+
+	  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
+
+	  return arr2;
+	}
+
+	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.");
+	}
+
+	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.");
+	}
+
+	function _createForOfIteratorHelper(o, allowArrayLike) {
+	  var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
+
+	  if (!it) {
+	    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+	      if (it) o = it;
+	      var i = 0;
+
+	      var F = function () {};
+
+	      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
+	      };
+	    }
+
+	    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	  }
+
+	  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 $$1d = _export;
+	var global$12 = global$1o;
+
+	// `globalThis` object
+	// https://tc39.es/ecma262/#sec-globalthis
+	$$1d({ global: true }, {
+	  globalThis: global$12
 	});
 
-	var useSymbolAsUid = nativeSymbol
-	  // eslint-disable-next-line no-undef
-	  && !Symbol.sham
-	  // eslint-disable-next-line no-undef
-	  && typeof Symbol.iterator == 'symbol';
+	var global$11 = global$1o;
 
-	// `IsArray` abstract operation
-	// https://tc39.github.io/ecma262/#sec-isarray
-	var isArray = Array.isArray || function isArray(arg) {
-	  return classofRaw(arg) == 'Array';
-	};
+	var path$1 = global$11;
 
-	// `ToObject` abstract operation
-	// https://tc39.github.io/ecma262/#sec-toobject
-	var toObject = function (argument) {
-	  return Object(requireObjectCoercible(argument));
+	var wellKnownSymbolWrapped = {};
+
+	var wellKnownSymbol$r = wellKnownSymbol$t;
+
+	wellKnownSymbolWrapped.f = wellKnownSymbol$r;
+
+	var path = path$1;
+	var hasOwn$e = hasOwnProperty_1;
+	var wrappedWellKnownSymbolModule$1 = wellKnownSymbolWrapped;
+	var defineProperty$c = objectDefineProperty.f;
+
+	var defineWellKnownSymbol$4 = function (NAME) {
+	  var Symbol = path.Symbol || (path.Symbol = {});
+	  if (!hasOwn$e(Symbol, NAME)) defineProperty$c(Symbol, NAME, {
+	    value: wrappedWellKnownSymbolModule$1.f(NAME)
+	  });
 	};
 
+	var defineWellKnownSymbol$3 = defineWellKnownSymbol$4;
+
+	// `Symbol.iterator` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.iterator
+	defineWellKnownSymbol$3('iterator');
+
+	var objectDefineProperties = {};
+
+	var internalObjectKeys = objectKeysInternal;
+	var enumBugKeys$1 = enumBugKeys$3;
+
 	// `Object.keys` method
-	// https://tc39.github.io/ecma262/#sec-object.keys
-	var objectKeys = Object.keys || function keys(O) {
-	  return objectKeysInternal(O, enumBugKeys);
+	// 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);
 	};
 
+	var DESCRIPTORS$j = descriptors;
+	var V8_PROTOTYPE_DEFINE_BUG = v8PrototypeDefineBug;
+	var definePropertyModule$5 = objectDefineProperty;
+	var anObject$k = anObject$n;
+	var toIndexedObject$9 = toIndexedObject$d;
+	var objectKeys$3 = objectKeys$4;
+
 	// `Object.defineProperties` method
-	// https://tc39.github.io/ecma262/#sec-object.defineproperties
-	var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
-	  anObject(O);
-	  var keys = objectKeys(Properties);
+	// https://tc39.es/ecma262/#sec-object.defineproperties
+	// eslint-disable-next-line es/no-object-defineproperties -- safe
+	objectDefineProperties.f = DESCRIPTORS$j && !V8_PROTOTYPE_DEFINE_BUG ? Object.defineProperties : function defineProperties(O, Properties) {
+	  anObject$k(O);
+	  var props = toIndexedObject$9(Properties);
+	  var keys = objectKeys$3(Properties);
 	  var length = keys.length;
 	  var index = 0;
 	  var key;
-	  while (length > index) objectDefineProperty.f(O, key = keys[index++], Properties[key]);
+	  while (length > index) definePropertyModule$5.f(O, key = keys[index++], props[key]);
 	  return O;
 	};
 
-	var html = getBuiltIn('document', 'documentElement');
+	var getBuiltIn$7 = getBuiltIn$b;
+
+	var html$2 = getBuiltIn$7('document', 'documentElement');
+
+	/* global ActiveXObject -- old IE, WSH */
+
+	var anObject$j = anObject$n;
+	var definePropertiesModule$1 = objectDefineProperties;
+	var enumBugKeys = enumBugKeys$3;
+	var hiddenKeys$2 = hiddenKeys$6;
+	var html$1 = html$2;
+	var documentCreateElement$1 = documentCreateElement$2;
+	var sharedKey$2 = sharedKey$4;
 
 	var GT = '>';
 	var LT = '<';
-	var PROTOTYPE = 'prototype';
+	var PROTOTYPE$2 = 'prototype';
 	var SCRIPT = 'script';
-	var IE_PROTO = sharedKey('IE_PROTO');
+	var IE_PROTO$1 = sharedKey$2('IE_PROTO');
 
 	var EmptyConstructor = function () { /* empty */ };
 
@@ -628,11 +1275,11 @@
 	// 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 iframe = documentCreateElement$1('iframe');
 	  var JS = 'java' + SCRIPT + ':';
 	  var iframeDocument;
 	  iframe.style.display = 'none';
-	  html.appendChild(iframe);
+	  html$1.appendChild(iframe);
 	  // https://github.com/zloirock/core-js/issues/475
 	  iframe.src = String(JS);
 	  iframeDocument = iframe.contentWindow.document;
@@ -650,438 +1297,1113 @@
 	var activeXDocument;
 	var NullProtoObject = function () {
 	  try {
-	    /* global ActiveXObject */
-	    activeXDocument = document.domain && new ActiveXObject('htmlfile');
+	    activeXDocument = new ActiveXObject('htmlfile');
 	  } catch (error) { /* ignore */ }
-	  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
+	  NullProtoObject = typeof document != 'undefined'
+	    ? document.domain && activeXDocument
+	      ? NullProtoObjectViaActiveX(activeXDocument) // old IE
+	      : NullProtoObjectViaIFrame()
+	    : NullProtoObjectViaActiveX(activeXDocument); // WSH
 	  var length = enumBugKeys.length;
-	  while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];
+	  while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
 	  return NullProtoObject();
 	};
 
-	hiddenKeys[IE_PROTO] = true;
+	hiddenKeys$2[IE_PROTO$1] = true;
 
 	// `Object.create` method
-	// https://tc39.github.io/ecma262/#sec-object.create
+	// https://tc39.es/ecma262/#sec-object.create
 	var objectCreate = Object.create || function create(O, Properties) {
 	  var result;
 	  if (O !== null) {
-	    EmptyConstructor[PROTOTYPE] = anObject(O);
+	    EmptyConstructor[PROTOTYPE$2] = anObject$j(O);
 	    result = new EmptyConstructor();
-	    EmptyConstructor[PROTOTYPE] = null;
+	    EmptyConstructor[PROTOTYPE$2] = null;
 	    // add "__proto__" for Object.getPrototypeOf polyfill
-	    result[IE_PROTO] = O;
+	    result[IE_PROTO$1] = O;
 	  } else result = NullProtoObject();
-	  return Properties === undefined ? result : objectDefineProperties(result, Properties);
+	  return Properties === undefined ? result : definePropertiesModule$1.f(result, Properties);
 	};
 
-	var nativeGetOwnPropertyNames = objectGetOwnPropertyNames.f;
+	var wellKnownSymbol$q = wellKnownSymbol$t;
+	var create$a = objectCreate;
+	var definePropertyModule$4 = objectDefineProperty;
 
-	var toString$1 = {}.toString;
+	var UNSCOPABLES = wellKnownSymbol$q('unscopables');
+	var ArrayPrototype$1 = Array.prototype;
 
-	var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
-	  ? Object.getOwnPropertyNames(window) : [];
+	// Array.prototype[@@unscopables]
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	if (ArrayPrototype$1[UNSCOPABLES] == undefined) {
+	  definePropertyModule$4.f(ArrayPrototype$1, UNSCOPABLES, {
+	    configurable: true,
+	    value: create$a(null)
+	  });
+	}
 
-	var getWindowNames = function (it) {
-	  try {
-	    return nativeGetOwnPropertyNames(it);
-	  } catch (error) {
-	    return windowNames.slice();
-	  }
+	// add a key to Array.prototype[@@unscopables]
+	var addToUnscopables$6 = function (key) {
+	  ArrayPrototype$1[UNSCOPABLES][key] = true;
 	};
 
-	// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
-	var f$5 = function getOwnPropertyNames(it) {
-	  return windowNames && toString$1.call(it) == '[object Window]'
-	    ? getWindowNames(it)
-	    : nativeGetOwnPropertyNames(toIndexedObject(it));
-	};
+	var iterators = {};
 
-	var objectGetOwnPropertyNamesExternal = {
-		f: f$5
-	};
+	var fails$N = fails$V;
 
-	var WellKnownSymbolsStore = shared('wks');
-	var Symbol$1 = global_1.Symbol;
-	var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;
+	var correctPrototypeGetter = !fails$N(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 wellKnownSymbol = function (name) {
-	  if (!has(WellKnownSymbolsStore, name)) {
-	    if (nativeSymbol && has(Symbol$1, name)) WellKnownSymbolsStore[name] = Symbol$1[name];
-	    else WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
-	  } return WellKnownSymbolsStore[name];
-	};
+	var global$10 = global$1o;
+	var hasOwn$d = hasOwnProperty_1;
+	var isCallable$h = isCallable$r;
+	var toObject$g = toObject$i;
+	var sharedKey$1 = sharedKey$4;
+	var CORRECT_PROTOTYPE_GETTER$1 = correctPrototypeGetter;
 
-	var f$6 = wellKnownSymbol;
+	var IE_PROTO = sharedKey$1('IE_PROTO');
+	var Object$2 = global$10.Object;
+	var ObjectPrototype$4 = Object$2.prototype;
 
-	var wellKnownSymbolWrapped = {
-		f: f$6
+	// `Object.getPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.getprototypeof
+	var objectGetPrototypeOf = CORRECT_PROTOTYPE_GETTER$1 ? Object$2.getPrototypeOf : function (O) {
+	  var object = toObject$g(O);
+	  if (hasOwn$d(object, IE_PROTO)) return object[IE_PROTO];
+	  var constructor = object.constructor;
+	  if (isCallable$h(constructor) && object instanceof constructor) {
+	    return constructor.prototype;
+	  } return object instanceof Object$2 ? ObjectPrototype$4 : null;
 	};
 
-	var defineProperty = objectDefineProperty.f;
+	var fails$M = fails$V;
+	var isCallable$g = isCallable$r;
+	var getPrototypeOf$4 = objectGetPrototypeOf;
+	var redefine$e = redefine$h.exports;
+	var wellKnownSymbol$p = wellKnownSymbol$t;
 
-	var defineWellKnownSymbol = function (NAME) {
-	  var Symbol = path.Symbol || (path.Symbol = {});
-	  if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {
-	    value: wellKnownSymbolWrapped.f(NAME)
-	  });
-	};
+	var ITERATOR$a = wellKnownSymbol$p('iterator');
+	var BUGGY_SAFARI_ITERATORS$1 = false;
 
-	var defineProperty$1 = objectDefineProperty.f;
+	// `%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 NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails$M(function () {
+	  var test = {};
+	  // FF44- legacy iterators case
+	  return IteratorPrototype$2[ITERATOR$a].call(test) !== test;
+	});
 
-	var TO_STRING_TAG = wellKnownSymbol('toStringTag');
+	if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};
 
-	var setToStringTag = function (it, TAG, STATIC) {
-	  if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG)) {
-	    defineProperty$1(it, TO_STRING_TAG, { configurable: true, value: TAG });
-	  }
-	};
+	// `%IteratorPrototype%[@@iterator]()` method
+	// https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
+	if (!isCallable$g(IteratorPrototype$2[ITERATOR$a])) {
+	  redefine$e(IteratorPrototype$2, ITERATOR$a, function () {
+	    return this;
+	  });
+	}
 
-	var aFunction$1 = function (it) {
-	  if (typeof it != 'function') {
-	    throw TypeError(String(it) + ' is not a function');
-	  } return it;
+	var iteratorsCore = {
+	  IteratorPrototype: IteratorPrototype$2,
+	  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
 	};
 
-	// optional / simple context binding
-	var functionBindContext = function (fn, that, length) {
-	  aFunction$1(fn);
-	  if (that === undefined) return fn;
-	  switch (length) {
-	    case 0: return function () {
-	      return fn.call(that);
-	    };
-	    case 1: return function (a) {
-	      return fn.call(that, a);
-	    };
-	    case 2: return function (a, b) {
-	      return fn.call(that, a, b);
-	    };
-	    case 3: return function (a, b, c) {
-	      return fn.call(that, a, b, c);
-	    };
-	  }
-	  return function (/* ...args */) {
-	    return fn.apply(that, arguments);
-	  };
-	};
+	var defineProperty$b = objectDefineProperty.f;
+	var hasOwn$c = hasOwnProperty_1;
+	var wellKnownSymbol$o = wellKnownSymbol$t;
 
-	var SPECIES = wellKnownSymbol('species');
+	var TO_STRING_TAG$4 = wellKnownSymbol$o('toStringTag');
 
-	// `ArraySpeciesCreate` abstract operation
-	// https://tc39.github.io/ecma262/#sec-arrayspeciescreate
-	var arraySpeciesCreate = function (originalArray, length) {
-	  var C;
-	  if (isArray(originalArray)) {
-	    C = originalArray.constructor;
-	    // cross-realm fallback
-	    if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;
-	    else if (isObject(C)) {
-	      C = C[SPECIES];
-	      if (C === null) C = undefined;
-	    }
-	  } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+	var setToStringTag$a = function (target, TAG, STATIC) {
+	  if (target && !STATIC) target = target.prototype;
+	  if (target && !hasOwn$c(target, TO_STRING_TAG$4)) {
+	    defineProperty$b(target, TO_STRING_TAG$4, { configurable: true, value: TAG });
+	  }
 	};
 
-	var push = [].push;
+	var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+	var create$9 = objectCreate;
+	var createPropertyDescriptor$4 = createPropertyDescriptor$7;
+	var setToStringTag$9 = setToStringTag$a;
+	var Iterators$4 = iterators;
 
-	// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation
-	var createMethod$1 = function (TYPE) {
-	  var IS_MAP = TYPE == 1;
-	  var IS_FILTER = TYPE == 2;
-	  var IS_SOME = TYPE == 3;
-	  var IS_EVERY = TYPE == 4;
-	  var IS_FIND_INDEX = TYPE == 6;
-	  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
-	  return function ($this, callbackfn, that, specificCreate) {
-	    var O = toObject($this);
-	    var self = indexedObject(O);
-	    var boundFunction = functionBindContext(callbackfn, that, 3);
-	    var length = toLength(self.length);
-	    var index = 0;
-	    var create = specificCreate || arraySpeciesCreate;
-	    var target = IS_MAP ? create($this, length) : IS_FILTER ? 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 if (IS_EVERY) return false;  // every
-	      }
-	    }
-	    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
-	  };
-	};
+	var returnThis$1 = function () { return this; };
 
-	var arrayIteration = {
-	  // `Array.prototype.forEach` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-	  forEach: createMethod$1(0),
-	  // `Array.prototype.map` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.map
-	  map: createMethod$1(1),
-	  // `Array.prototype.filter` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.filter
-	  filter: createMethod$1(2),
-	  // `Array.prototype.some` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.some
-	  some: createMethod$1(3),
-	  // `Array.prototype.every` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.every
-	  every: createMethod$1(4),
-	  // `Array.prototype.find` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.find
-	  find: createMethod$1(5),
-	  // `Array.prototype.findIndex` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex
-	  findIndex: createMethod$1(6)
+	var createIteratorConstructor$2 = function (IteratorConstructor, NAME, next, ENUMERABLE_NEXT) {
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  IteratorConstructor.prototype = create$9(IteratorPrototype$1, { next: createPropertyDescriptor$4(+!ENUMERABLE_NEXT, next) });
+	  setToStringTag$9(IteratorConstructor, TO_STRING_TAG, false);
+	  Iterators$4[TO_STRING_TAG] = returnThis$1;
+	  return IteratorConstructor;
 	};
 
-	var $forEach = arrayIteration.forEach;
-
-	var HIDDEN = sharedKey('hidden');
-	var SYMBOL = 'Symbol';
-	var PROTOTYPE$1 = 'prototype';
-	var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
-	var setInternalState = internalState.set;
-	var getInternalState = internalState.getterFor(SYMBOL);
-	var ObjectPrototype = Object[PROTOTYPE$1];
-	var $Symbol = global_1.Symbol;
-	var $stringify = getBuiltIn('JSON', 'stringify');
-	var nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
-	var nativeDefineProperty$1 = objectDefineProperty.f;
-	var nativeGetOwnPropertyNames$1 = objectGetOwnPropertyNamesExternal.f;
-	var nativePropertyIsEnumerable$1 = objectPropertyIsEnumerable.f;
-	var AllSymbols = shared('symbols');
-	var ObjectPrototypeSymbols = shared('op-symbols');
-	var StringToSymbolRegistry = shared('string-to-symbol-registry');
-	var SymbolToStringRegistry = shared('symbol-to-string-registry');
-	var WellKnownSymbolsStore$1 = shared('wks');
-	var QObject = global_1.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;
+	var global$$ = global$1o;
+	var isCallable$f = isCallable$r;
 
-	// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
-	var setSymbolDescriptor = descriptors && fails(function () {
-	  return objectCreate(nativeDefineProperty$1({}, 'a', {
-	    get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
-	  })).a != 7;
-	}) ? function (O, P, Attributes) {
-	  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$1(ObjectPrototype, P);
-	  if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];
-	  nativeDefineProperty$1(O, P, Attributes);
-	  if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {
-	    nativeDefineProperty$1(ObjectPrototype, P, ObjectPrototypeDescriptor);
-	  }
-	} : nativeDefineProperty$1;
+	var String$4 = global$$.String;
+	var TypeError$i = global$$.TypeError;
 
-	var wrap = function (tag, description) {
-	  var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE$1]);
-	  setInternalState(symbol, {
-	    type: SYMBOL,
-	    tag: tag,
-	    description: description
-	  });
-	  if (!descriptors) symbol.description = description;
-	  return symbol;
+	var aPossiblePrototype$1 = function (argument) {
+	  if (typeof argument == 'object' || isCallable$f(argument)) return argument;
+	  throw TypeError$i("Can't set " + String$4(argument) + ' as a prototype');
 	};
 
-	var isSymbol = useSymbolAsUid ? function (it) {
-	  return typeof it == 'symbol';
-	} : function (it) {
-	  return Object(it) instanceof $Symbol;
-	};
+	/* eslint-disable no-proto -- safe */
 
-	var $defineProperty = function defineProperty(O, P, Attributes) {
-	  if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
-	  anObject(O);
-	  var key = toPrimitive(P, true);
-	  anObject(Attributes);
-	  if (has(AllSymbols, key)) {
-	    if (!Attributes.enumerable) {
-	      if (!has(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor(1, {}));
-	      O[HIDDEN][key] = true;
+	var uncurryThis$M = functionUncurryThis;
+	var anObject$i = anObject$n;
+	var aPossiblePrototype = aPossiblePrototype$1;
+
+	// `Object.setPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.setprototypeof
+	// Works with __proto__ only. Old v8 can't work with null proto objects.
+	// eslint-disable-next-line es/no-object-setprototypeof -- safe
+	var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+	  var CORRECT_SETTER = false;
+	  var test = {};
+	  var setter;
+	  try {
+	    // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	    setter = uncurryThis$M(Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set);
+	    setter(test, []);
+	    CORRECT_SETTER = test instanceof Array;
+	  } catch (error) { /* empty */ }
+	  return function setPrototypeOf(O, proto) {
+	    anObject$i(O);
+	    aPossiblePrototype(proto);
+	    if (CORRECT_SETTER) setter(O, proto);
+	    else O.__proto__ = proto;
+	    return O;
+	  };
+	}() : undefined);
+
+	var $$1c = _export;
+	var call$l = functionCall;
+	var FunctionName$1 = functionName;
+	var isCallable$e = isCallable$r;
+	var createIteratorConstructor$1 = createIteratorConstructor$2;
+	var getPrototypeOf$3 = objectGetPrototypeOf;
+	var setPrototypeOf$6 = objectSetPrototypeOf;
+	var setToStringTag$8 = setToStringTag$a;
+	var createNonEnumerableProperty$7 = createNonEnumerableProperty$b;
+	var redefine$d = redefine$h.exports;
+	var wellKnownSymbol$n = wellKnownSymbol$t;
+	var Iterators$3 = iterators;
+	var IteratorsCore = iteratorsCore;
+
+	var PROPER_FUNCTION_NAME$3 = FunctionName$1.PROPER;
+	var CONFIGURABLE_FUNCTION_NAME$1 = FunctionName$1.CONFIGURABLE;
+	var IteratorPrototype = IteratorsCore.IteratorPrototype;
+	var BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;
+	var ITERATOR$9 = 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$9]
+	    || 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 (CurrentIteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
+	      if (getPrototypeOf$3(CurrentIteratorPrototype) !== IteratorPrototype) {
+	        if (setPrototypeOf$6) {
+	          setPrototypeOf$6(CurrentIteratorPrototype, IteratorPrototype);
+	        } else if (!isCallable$e(CurrentIteratorPrototype[ITERATOR$9])) {
+	          redefine$d(CurrentIteratorPrototype, ITERATOR$9, returnThis);
+	        }
+	      }
+	      // Set @@toStringTag to native iterators
+	      setToStringTag$8(CurrentIteratorPrototype, TO_STRING_TAG, true);
+	    }
+	  }
+
+	  // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+	  if (PROPER_FUNCTION_NAME$3 && DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+	    if (CONFIGURABLE_FUNCTION_NAME$1) {
+	      createNonEnumerableProperty$7(IterablePrototype, 'name', VALUES);
+	    } else {
+	      INCORRECT_VALUES_NAME = true;
+	      defaultIterator = function values() { return call$l(nativeIterator, this); };
+	    }
+	  }
+
+	  // 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 $$1c({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
+	  }
+
+	  // define iterator
+	  if (IterablePrototype[ITERATOR$9] !== defaultIterator) {
+	    redefine$d(IterablePrototype, ITERATOR$9, defaultIterator, { name: DEFAULT });
+	  }
+	  Iterators$3[NAME] = defaultIterator;
+
+	  return methods;
+	};
+
+	var toIndexedObject$8 = toIndexedObject$d;
+	var addToUnscopables$5 = addToUnscopables$6;
+	var Iterators$2 = iterators;
+	var InternalStateModule$8 = internalState;
+	var defineProperty$a = objectDefineProperty.f;
+	var defineIterator$2 = defineIterator$3;
+	var DESCRIPTORS$i = descriptors;
+
+	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$8(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
+	var values = Iterators$2.Arguments = Iterators$2.Array;
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$5('keys');
+	addToUnscopables$5('values');
+	addToUnscopables$5('entries');
+
+	// V8 ~ Chrome 45- bug
+	if (DESCRIPTORS$i && values.name !== 'values') try {
+	  defineProperty$a(values, 'name', { value: 'values' });
+	} catch (error) { /* empty */ }
+
+	var wellKnownSymbol$m = wellKnownSymbol$t;
+
+	var TO_STRING_TAG$3 = wellKnownSymbol$m('toStringTag');
+	var test$2 = {};
+
+	test$2[TO_STRING_TAG$3] = 'z';
+
+	var toStringTagSupport = String(test$2) === '[object z]';
+
+	var global$_ = global$1o;
+	var TO_STRING_TAG_SUPPORT$2 = toStringTagSupport;
+	var isCallable$d = isCallable$r;
+	var classofRaw = classofRaw$1;
+	var wellKnownSymbol$l = wellKnownSymbol$t;
+
+	var TO_STRING_TAG$2 = wellKnownSymbol$l('toStringTag');
+	var Object$1 = global$_.Object;
+
+	// 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$d = 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$1(it), TO_STRING_TAG$2)) == 'string' ? tag
+	    // builtinTag case
+	    : CORRECT_ARGUMENTS ? classofRaw(O)
+	    // ES3 arguments fallback
+	    : (result = classofRaw(O)) == 'Object' && isCallable$d(O.callee) ? 'Arguments' : result;
+	};
+
+	var TO_STRING_TAG_SUPPORT$1 = toStringTagSupport;
+	var classof$c = classof$d;
+
+	// `Object.prototype.toString` method implementation
+	// https://tc39.es/ecma262/#sec-object.prototype.tostring
+	var objectToString$1 = TO_STRING_TAG_SUPPORT$1 ? {}.toString : function toString() {
+	  return '[object ' + classof$c(this) + ']';
+	};
+
+	var TO_STRING_TAG_SUPPORT = toStringTagSupport;
+	var redefine$c = redefine$h.exports;
+	var toString$l = 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$l, { unsafe: true });
+	}
+
+	var global$Z = global$1o;
+	var classof$b = classof$d;
+
+	var String$3 = global$Z.String;
+
+	var toString$k = function (argument) {
+	  if (classof$b(argument) === 'Symbol') throw TypeError('Cannot convert a Symbol value to a string');
+	  return String$3(argument);
+	};
+
+	var uncurryThis$L = functionUncurryThis;
+	var toIntegerOrInfinity$8 = toIntegerOrInfinity$b;
+	var toString$j = toString$k;
+	var requireObjectCoercible$b = requireObjectCoercible$e;
+
+	var charAt$8 = uncurryThis$L(''.charAt);
+	var charCodeAt$2 = uncurryThis$L(''.charCodeAt);
+	var stringSlice$b = uncurryThis$L(''.slice);
+
+	var createMethod$5 = function (CONVERT_TO_STRING) {
+	  return function ($this, pos) {
+	    var S = toString$j(requireObjectCoercible$b($this));
+	    var position = toIntegerOrInfinity$8(pos);
+	    var size = S.length;
+	    var first, second;
+	    if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
+	    first = charCodeAt$2(S, position);
+	    return first < 0xD800 || first > 0xDBFF || position + 1 === size
+	      || (second = charCodeAt$2(S, position + 1)) < 0xDC00 || second > 0xDFFF
+	        ? CONVERT_TO_STRING
+	          ? charAt$8(S, position)
+	          : first
+	        : CONVERT_TO_STRING
+	          ? stringSlice$b(S, 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$7 = stringMultibyte.charAt;
+	var toString$i = toString$k;
+	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$7(this, {
+	    type: STRING_ITERATOR,
+	    string: toString$i(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$7(string, index);
+	  state.index += point.length;
+	  return { value: point, done: false };
+	});
+
+	// 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
+	};
+
+	// in old WebKit versions, `element.classList` is not an instance of global `DOMTokenList`
+	var documentCreateElement = documentCreateElement$2;
+
+	var classList$1 = documentCreateElement('span').classList;
+	var DOMTokenListPrototype$2 = classList$1 && classList$1.constructor && classList$1.constructor.prototype;
+
+	var domTokenListPrototype = DOMTokenListPrototype$2 === Object.prototype ? undefined : DOMTokenListPrototype$2;
+
+	var global$Y = global$1o;
+	var DOMIterables$1 = domIterables;
+	var DOMTokenListPrototype$1 = domTokenListPrototype;
+	var ArrayIteratorMethods = es_array_iterator;
+	var createNonEnumerableProperty$6 = createNonEnumerableProperty$b;
+	var wellKnownSymbol$k = wellKnownSymbol$t;
+
+	var ITERATOR$8 = wellKnownSymbol$k('iterator');
+	var TO_STRING_TAG$1 = wellKnownSymbol$k('toStringTag');
+	var ArrayValues = ArrayIteratorMethods.values;
+
+	var handlePrototype$1 = function (CollectionPrototype, COLLECTION_NAME) {
+	  if (CollectionPrototype) {
+	    // some Chrome versions have non-configurable methods on DOMTokenList
+	    if (CollectionPrototype[ITERATOR$8] !== ArrayValues) try {
+	      createNonEnumerableProperty$6(CollectionPrototype, ITERATOR$8, ArrayValues);
+	    } catch (error) {
+	      CollectionPrototype[ITERATOR$8] = ArrayValues;
+	    }
+	    if (!CollectionPrototype[TO_STRING_TAG$1]) {
+	      createNonEnumerableProperty$6(CollectionPrototype, TO_STRING_TAG$1, COLLECTION_NAME);
+	    }
+	    if (DOMIterables$1[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {
+	      // some Chrome versions have non-configurable methods on DOMTokenList
+	      if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+	        createNonEnumerableProperty$6(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
+	      } catch (error) {
+	        CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
+	      }
+	    }
+	  }
+	};
+
+	for (var COLLECTION_NAME$1 in DOMIterables$1) {
+	  handlePrototype$1(global$Y[COLLECTION_NAME$1] && global$Y[COLLECTION_NAME$1].prototype, COLLECTION_NAME$1);
+	}
+
+	handlePrototype$1(DOMTokenListPrototype$1, 'DOMTokenList');
+
+	var NATIVE_BIND$2 = functionBindNative;
+
+	var FunctionPrototype$1 = Function.prototype;
+	var apply$9 = FunctionPrototype$1.apply;
+	var call$k = FunctionPrototype$1.call;
+
+	// eslint-disable-next-line es/no-reflect -- safe
+	var functionApply = typeof Reflect == 'object' && Reflect.apply || (NATIVE_BIND$2 ? call$k.bind(apply$9) : function () {
+	  return call$k.apply(apply$9, arguments);
+	});
+
+	var classof$a = classofRaw$1;
+
+	// `IsArray` abstract operation
+	// https://tc39.es/ecma262/#sec-isarray
+	// eslint-disable-next-line es/no-array-isarray -- safe
+	var isArray$8 = Array.isArray || function isArray(argument) {
+	  return classof$a(argument) == 'Array';
+	};
+
+	var objectGetOwnPropertyNamesExternal = {};
+
+	var toPropertyKey$2 = toPropertyKey$5;
+	var definePropertyModule$3 = objectDefineProperty;
+	var createPropertyDescriptor$3 = createPropertyDescriptor$7;
+
+	var createProperty$5 = function (object, key, value) {
+	  var propertyKey = toPropertyKey$2(key);
+	  if (propertyKey in object) definePropertyModule$3.f(object, propertyKey, createPropertyDescriptor$3(0, value));
+	  else object[propertyKey] = value;
+	};
+
+	var global$X = global$1o;
+	var toAbsoluteIndex$7 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$g = lengthOfArrayLike$i;
+	var createProperty$4 = createProperty$5;
+
+	var Array$7 = global$X.Array;
+	var max$4 = Math.max;
+
+	var arraySliceSimple = function (O, start, end) {
+	  var length = lengthOfArrayLike$g(O);
+	  var k = toAbsoluteIndex$7(start, length);
+	  var fin = toAbsoluteIndex$7(end === undefined ? length : end, length);
+	  var result = Array$7(max$4(fin - k, 0));
+	  for (var n = 0; k < fin; k++, n++) createProperty$4(result, n, O[k]);
+	  result.length = n;
+	  return result;
+	};
+
+	/* eslint-disable es/no-object-getownpropertynames -- safe */
+
+	var classof$9 = classofRaw$1;
+	var toIndexedObject$7 = toIndexedObject$d;
+	var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+	var arraySlice$c = arraySliceSimple;
+
+	var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+	  ? Object.getOwnPropertyNames(window) : [];
+
+	var getWindowNames = function (it) {
+	  try {
+	    return $getOwnPropertyNames$1(it);
+	  } catch (error) {
+	    return arraySlice$c(windowNames);
+	  }
+	};
+
+	// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+	objectGetOwnPropertyNamesExternal.f = function getOwnPropertyNames(it) {
+	  return windowNames && classof$9(it) == 'Window'
+	    ? getWindowNames(it)
+	    : $getOwnPropertyNames$1(toIndexedObject$7(it));
+	};
+
+	var uncurryThis$K = functionUncurryThis;
+
+	var arraySlice$b = uncurryThis$K([].slice);
+
+	var uncurryThis$J = functionUncurryThis;
+	var aCallable$8 = aCallable$a;
+	var NATIVE_BIND$1 = functionBindNative;
+
+	var bind$f = uncurryThis$J(uncurryThis$J.bind);
+
+	// optional / simple context binding
+	var functionBindContext = function (fn, that) {
+	  aCallable$8(fn);
+	  return that === undefined ? fn : NATIVE_BIND$1 ? bind$f(fn, that) : function (/* ...args */) {
+	    return fn.apply(that, arguments);
+	  };
+	};
+
+	var uncurryThis$I = functionUncurryThis;
+	var fails$L = fails$V;
+	var isCallable$c = isCallable$r;
+	var classof$8 = classof$d;
+	var getBuiltIn$6 = getBuiltIn$b;
+	var inspectSource$1 = inspectSource$4;
+
+	var noop$2 = function () { /* empty */ };
+	var empty$1 = [];
+	var construct$1 = getBuiltIn$6('Reflect', 'construct');
+	var constructorRegExp = /^\s*(?:class|function)\b/;
+	var exec$6 = uncurryThis$I(constructorRegExp.exec);
+	var INCORRECT_TO_STRING = !constructorRegExp.exec(noop$2);
+
+	var isConstructorModern = function isConstructor(argument) {
+	  if (!isCallable$c(argument)) return false;
+	  try {
+	    construct$1(noop$2, empty$1, argument);
+	    return true;
+	  } catch (error) {
+	    return false;
+	  }
+	};
+
+	var isConstructorLegacy = function isConstructor(argument) {
+	  if (!isCallable$c(argument)) return false;
+	  switch (classof$8(argument)) {
+	    case 'AsyncFunction':
+	    case 'GeneratorFunction':
+	    case 'AsyncGeneratorFunction': return false;
+	  }
+	  try {
+	    // we can't check .prototype since constructors produced by .bind haven't it
+	    // `Function#toString` throws on some built-it function in some legacy engines
+	    // (for example, `DOMQuad` and similar in FF41-)
+	    return INCORRECT_TO_STRING || !!exec$6(constructorRegExp, inspectSource$1(argument));
+	  } catch (error) {
+	    return true;
+	  }
+	};
+
+	isConstructorLegacy.sham = true;
+
+	// `IsConstructor` abstract operation
+	// https://tc39.es/ecma262/#sec-isconstructor
+	var isConstructor$4 = !construct$1 || fails$L(function () {
+	  var called;
+	  return isConstructorModern(isConstructorModern.call)
+	    || !isConstructorModern(Object)
+	    || !isConstructorModern(function () { called = true; })
+	    || called;
+	}) ? isConstructorLegacy : isConstructorModern;
+
+	var global$W = global$1o;
+	var isArray$7 = isArray$8;
+	var isConstructor$3 = isConstructor$4;
+	var isObject$m = isObject$s;
+	var wellKnownSymbol$j = wellKnownSymbol$t;
+
+	var SPECIES$6 = wellKnownSymbol$j('species');
+	var Array$6 = global$W.Array;
+
+	// a part of `ArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#sec-arrayspeciescreate
+	var arraySpeciesConstructor$1 = function (originalArray) {
+	  var C;
+	  if (isArray$7(originalArray)) {
+	    C = originalArray.constructor;
+	    // cross-realm fallback
+	    if (isConstructor$3(C) && (C === Array$6 || isArray$7(C.prototype))) C = undefined;
+	    else if (isObject$m(C)) {
+	      C = C[SPECIES$6];
+	      if (C === null) C = undefined;
+	    }
+	  } return C === undefined ? Array$6 : C;
+	};
+
+	var arraySpeciesConstructor = arraySpeciesConstructor$1;
+
+	// `ArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#sec-arrayspeciescreate
+	var arraySpeciesCreate$4 = function (originalArray, length) {
+	  return new (arraySpeciesConstructor(originalArray))(length === 0 ? 0 : length);
+	};
+
+	var bind$e = functionBindContext;
+	var uncurryThis$H = functionUncurryThis;
+	var IndexedObject$3 = indexedObject;
+	var toObject$f = toObject$i;
+	var lengthOfArrayLike$f = lengthOfArrayLike$i;
+	var arraySpeciesCreate$3 = arraySpeciesCreate$4;
+
+	var push$9 = uncurryThis$H([].push);
+
+	// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterReject }` methods implementation
+	var createMethod$4 = function (TYPE) {
+	  var IS_MAP = TYPE == 1;
+	  var IS_FILTER = TYPE == 2;
+	  var IS_SOME = TYPE == 3;
+	  var IS_EVERY = TYPE == 4;
+	  var IS_FIND_INDEX = TYPE == 6;
+	  var IS_FILTER_REJECT = TYPE == 7;
+	  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+	  return function ($this, callbackfn, that, specificCreate) {
+	    var O = toObject$f($this);
+	    var self = IndexedObject$3(O);
+	    var boundFunction = bind$e(callbackfn, that);
+	    var length = lengthOfArrayLike$f(self);
+	    var index = 0;
+	    var create = specificCreate || arraySpeciesCreate$3;
+	    var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_REJECT ? 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$9(target, value);      // filter
+	        } else switch (TYPE) {
+	          case 4: return false;             // every
+	          case 7: push$9(target, value);      // filterReject
+	        }
+	      }
+	    }
+	    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.filterReject` method
+	  // https://github.com/tc39/proposal-array-filtering
+	  filterReject: createMethod$4(7)
+	};
+
+	var $$1b = _export;
+	var global$V = global$1o;
+	var getBuiltIn$5 = getBuiltIn$b;
+	var apply$8 = functionApply;
+	var call$j = functionCall;
+	var uncurryThis$G = functionUncurryThis;
+	var DESCRIPTORS$h = descriptors;
+	var NATIVE_SYMBOL$1 = nativeSymbol;
+	var fails$K = fails$V;
+	var hasOwn$b = hasOwnProperty_1;
+	var isArray$6 = isArray$8;
+	var isCallable$b = isCallable$r;
+	var isObject$l = isObject$s;
+	var isPrototypeOf$8 = objectIsPrototypeOf;
+	var isSymbol$3 = isSymbol$6;
+	var anObject$h = anObject$n;
+	var toObject$e = toObject$i;
+	var toIndexedObject$6 = toIndexedObject$d;
+	var toPropertyKey$1 = toPropertyKey$5;
+	var $toString$3 = toString$k;
+	var createPropertyDescriptor$2 = createPropertyDescriptor$7;
+	var nativeObjectCreate = objectCreate;
+	var objectKeys$2 = objectKeys$4;
+	var getOwnPropertyNamesModule$1 = objectGetOwnPropertyNames;
+	var getOwnPropertyNamesExternal = objectGetOwnPropertyNamesExternal;
+	var getOwnPropertySymbolsModule$1 = objectGetOwnPropertySymbols;
+	var getOwnPropertyDescriptorModule$2 = objectGetOwnPropertyDescriptor;
+	var definePropertyModule$2 = objectDefineProperty;
+	var definePropertiesModule = objectDefineProperties;
+	var propertyIsEnumerableModule$1 = objectPropertyIsEnumerable;
+	var arraySlice$a = arraySlice$b;
+	var redefine$b = redefine$h.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$t;
+	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$3 = Object[PROTOTYPE$1];
+	var $Symbol = global$V.Symbol;
+	var SymbolPrototype$1 = $Symbol && $Symbol[PROTOTYPE$1];
+	var TypeError$h = global$V.TypeError;
+	var QObject = global$V.QObject;
+	var $stringify = getBuiltIn$5('JSON', 'stringify');
+	var nativeGetOwnPropertyDescriptor$2 = getOwnPropertyDescriptorModule$2.f;
+	var nativeDefineProperty$1 = definePropertyModule$2.f;
+	var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
+	var nativePropertyIsEnumerable = propertyIsEnumerableModule$1.f;
+	var push$8 = uncurryThis$G([].push);
+
+	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');
+
+	// 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$K(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$3, P);
+	  if (ObjectPrototypeDescriptor) delete ObjectPrototype$3[P];
+	  nativeDefineProperty$1(O, P, Attributes);
+	  if (ObjectPrototypeDescriptor && O !== ObjectPrototype$3) {
+	    nativeDefineProperty$1(ObjectPrototype$3, P, ObjectPrototypeDescriptor);
+	  }
+	} : nativeDefineProperty$1;
+
+	var wrap$2 = function (tag, description) {
+	  var symbol = AllSymbols[tag] = nativeObjectCreate(SymbolPrototype$1);
+	  setInternalState$6(symbol, {
+	    type: SYMBOL,
+	    tag: tag,
+	    description: description
+	  });
+	  if (!DESCRIPTORS$h) symbol.description = description;
+	  return symbol;
+	};
+
+	var $defineProperty = function defineProperty(O, P, Attributes) {
+	  if (O === ObjectPrototype$3) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+	  anObject$h(O);
+	  var key = toPropertyKey$1(P);
+	  anObject$h(Attributes);
+	  if (hasOwn$b(AllSymbols, key)) {
+	    if (!Attributes.enumerable) {
+	      if (!hasOwn$b(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor$2(1, {}));
+	      O[HIDDEN][key] = true;
 	    } else {
-	      if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
-	      Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
+	      if (hasOwn$b(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+	      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor$2(0, false) });
 	    } return setSymbolDescriptor(O, key, Attributes);
 	  } return nativeDefineProperty$1(O, key, Attributes);
 	};
 
 	var $defineProperties = function defineProperties(O, Properties) {
-	  anObject(O);
-	  var properties = toIndexedObject(Properties);
-	  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
-	  $forEach(keys, function (key) {
-	    if (!descriptors || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+	  anObject$h(O);
+	  var properties = toIndexedObject$6(Properties);
+	  var keys = objectKeys$2(properties).concat($getOwnPropertySymbols(properties));
+	  $forEach$2(keys, function (key) {
+	    if (!DESCRIPTORS$h || call$j($propertyIsEnumerable$1, properties, key)) $defineProperty(O, key, properties[key]);
 	  });
 	  return O;
 	};
 
 	var $create = function create(O, Properties) {
-	  return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
+	  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);
 	};
 
-	var $propertyIsEnumerable = function propertyIsEnumerable(V) {
-	  var P = toPrimitive(V, true);
-	  var enumerable = nativePropertyIsEnumerable$1.call(this, P);
-	  if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;
-	  return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
+	var $propertyIsEnumerable$1 = function propertyIsEnumerable(V) {
+	  var P = toPropertyKey$1(V);
+	  var enumerable = call$j(nativePropertyIsEnumerable, this, P);
+	  if (this === ObjectPrototype$3 && hasOwn$b(AllSymbols, P) && !hasOwn$b(ObjectPrototypeSymbols, P)) return false;
+	  return enumerable || !hasOwn$b(this, P) || !hasOwn$b(AllSymbols, P) || hasOwn$b(this, HIDDEN) && this[HIDDEN][P]
+	    ? enumerable : true;
 	};
 
 	var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
-	  var it = toIndexedObject(O);
-	  var key = toPrimitive(P, true);
-	  if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;
-	  var descriptor = nativeGetOwnPropertyDescriptor$1(it, key);
-	  if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {
+	  var it = toIndexedObject$6(O);
+	  var key = toPropertyKey$1(P);
+	  if (it === ObjectPrototype$3 && hasOwn$b(AllSymbols, key) && !hasOwn$b(ObjectPrototypeSymbols, key)) return;
+	  var descriptor = nativeGetOwnPropertyDescriptor$2(it, key);
+	  if (descriptor && hasOwn$b(AllSymbols, key) && !(hasOwn$b(it, HIDDEN) && it[HIDDEN][key])) {
 	    descriptor.enumerable = true;
 	  }
 	  return descriptor;
 	};
 
 	var $getOwnPropertyNames = function getOwnPropertyNames(O) {
-	  var names = nativeGetOwnPropertyNames$1(toIndexedObject(O));
+	  var names = nativeGetOwnPropertyNames(toIndexedObject$6(O));
 	  var result = [];
-	  $forEach(names, function (key) {
-	    if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);
+	  $forEach$2(names, function (key) {
+	    if (!hasOwn$b(AllSymbols, key) && !hasOwn$b(hiddenKeys$1, key)) push$8(result, key);
 	  });
 	  return result;
 	};
 
 	var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
-	  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;
-	  var names = nativeGetOwnPropertyNames$1(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
+	  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$3;
+	  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject$6(O));
 	  var result = [];
-	  $forEach(names, function (key) {
-	    if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {
-	      result.push(AllSymbols[key]);
+	  $forEach$2(names, function (key) {
+	    if (hasOwn$b(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || hasOwn$b(ObjectPrototype$3, key))) {
+	      push$8(result, AllSymbols[key]);
 	    }
 	  });
 	  return result;
 	};
 
 	// `Symbol` constructor
-	// https://tc39.github.io/ecma262/#sec-symbol-constructor
-	if (!nativeSymbol) {
+	// https://tc39.es/ecma262/#sec-symbol-constructor
+	if (!NATIVE_SYMBOL$1) {
 	  $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(description);
+	    if (isPrototypeOf$8(SymbolPrototype$1, this)) throw TypeError$h('Symbol is not a constructor');
+	    var description = !arguments.length || arguments[0] === undefined ? undefined : $toString$3(arguments[0]);
+	    var tag = uid$2(description);
 	    var setter = function (value) {
-	      if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);
-	      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
-	      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
+	      if (this === ObjectPrototype$3) call$j(setter, ObjectPrototypeSymbols, value);
+	      if (hasOwn$b(this, HIDDEN) && hasOwn$b(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+	      setSymbolDescriptor(this, tag, createPropertyDescriptor$2(1, value));
 	    };
-	    if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });
-	    return wrap(tag, description);
+	    if (DESCRIPTORS$h && USE_SETTER) setSymbolDescriptor(ObjectPrototype$3, tag, { configurable: true, set: setter });
+	    return wrap$2(tag, description);
 	  };
 
-	  redefine($Symbol[PROTOTYPE$1], 'toString', function toString() {
-	    return getInternalState(this).tag;
+	  SymbolPrototype$1 = $Symbol[PROTOTYPE$1];
+
+	  redefine$b(SymbolPrototype$1, 'toString', function toString() {
+	    return getInternalState$4(this).tag;
 	  });
 
-	  redefine($Symbol, 'withoutSetter', function (description) {
-	    return wrap(uid(description), description);
+	  redefine$b($Symbol, 'withoutSetter', function (description) {
+	    return wrap$2(uid$2(description), description);
 	  });
 
-	  objectPropertyIsEnumerable.f = $propertyIsEnumerable;
-	  objectDefineProperty.f = $defineProperty;
-	  objectGetOwnPropertyDescriptor.f = $getOwnPropertyDescriptor;
-	  objectGetOwnPropertyNames.f = objectGetOwnPropertyNamesExternal.f = $getOwnPropertyNames;
-	  objectGetOwnPropertySymbols.f = $getOwnPropertySymbols;
+	  propertyIsEnumerableModule$1.f = $propertyIsEnumerable$1;
+	  definePropertyModule$2.f = $defineProperty;
+	  definePropertiesModule.f = $defineProperties;
+	  getOwnPropertyDescriptorModule$2.f = $getOwnPropertyDescriptor;
+	  getOwnPropertyNamesModule$1.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+	  getOwnPropertySymbolsModule$1.f = $getOwnPropertySymbols;
 
-	  wellKnownSymbolWrapped.f = function (name) {
-	    return wrap(wellKnownSymbol(name), name);
+	  wrappedWellKnownSymbolModule.f = function (name) {
+	    return wrap$2(wellKnownSymbol$i(name), name);
 	  };
 
-	  if (descriptors) {
+	  if (DESCRIPTORS$h) {
 	    // https://github.com/tc39/proposal-Symbol-description
-	    nativeDefineProperty$1($Symbol[PROTOTYPE$1], 'description', {
+	    nativeDefineProperty$1(SymbolPrototype$1, 'description', {
 	      configurable: true,
 	      get: function description() {
-	        return getInternalState(this).description;
+	        return getInternalState$4(this).description;
 	      }
 	    });
 	    {
-	      redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+	      redefine$b(ObjectPrototype$3, 'propertyIsEnumerable', $propertyIsEnumerable$1, { unsafe: true });
 	    }
 	  }
 	}
 
-	_export({ global: true, wrap: true, forced: !nativeSymbol, sham: !nativeSymbol }, {
+	$$1b({ global: true, wrap: true, forced: !NATIVE_SYMBOL$1, sham: !NATIVE_SYMBOL$1 }, {
 	  Symbol: $Symbol
 	});
 
-	$forEach(objectKeys(WellKnownSymbolsStore$1), function (name) {
-	  defineWellKnownSymbol(name);
+	$forEach$2(objectKeys$2(WellKnownSymbolsStore), function (name) {
+	  defineWellKnownSymbol$2(name);
 	});
 
-	_export({ target: SYMBOL, stat: true, forced: !nativeSymbol }, {
+	$$1b({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL$1 }, {
 	  // `Symbol.for` method
-	  // https://tc39.github.io/ecma262/#sec-symbol.for
+	  // https://tc39.es/ecma262/#sec-symbol.for
 	  'for': function (key) {
-	    var string = String(key);
-	    if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+	    var string = $toString$3(key);
+	    if (hasOwn$b(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
 	    var symbol = $Symbol(string);
 	    StringToSymbolRegistry[string] = symbol;
 	    SymbolToStringRegistry[symbol] = string;
 	    return symbol;
 	  },
 	  // `Symbol.keyFor` method
-	  // https://tc39.github.io/ecma262/#sec-symbol.keyfor
+	  // https://tc39.es/ecma262/#sec-symbol.keyfor
 	  keyFor: function keyFor(sym) {
-	    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');
-	    if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+	    if (!isSymbol$3(sym)) throw TypeError$h(sym + ' is not a symbol');
+	    if (hasOwn$b(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
 	  },
 	  useSetter: function () { USE_SETTER = true; },
 	  useSimple: function () { USE_SETTER = false; }
 	});
 
-	_export({ target: 'Object', stat: true, forced: !nativeSymbol, sham: !descriptors }, {
+	$$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1, sham: !DESCRIPTORS$h }, {
 	  // `Object.create` method
-	  // https://tc39.github.io/ecma262/#sec-object.create
+	  // https://tc39.es/ecma262/#sec-object.create
 	  create: $create,
 	  // `Object.defineProperty` method
-	  // https://tc39.github.io/ecma262/#sec-object.defineproperty
+	  // https://tc39.es/ecma262/#sec-object.defineproperty
 	  defineProperty: $defineProperty,
 	  // `Object.defineProperties` method
-	  // https://tc39.github.io/ecma262/#sec-object.defineproperties
+	  // https://tc39.es/ecma262/#sec-object.defineproperties
 	  defineProperties: $defineProperties,
 	  // `Object.getOwnPropertyDescriptor` method
-	  // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors
+	  // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
 	  getOwnPropertyDescriptor: $getOwnPropertyDescriptor
 	});
 
-	_export({ target: 'Object', stat: true, forced: !nativeSymbol }, {
+	$$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1 }, {
 	  // `Object.getOwnPropertyNames` method
-	  // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
+	  // https://tc39.es/ecma262/#sec-object.getownpropertynames
 	  getOwnPropertyNames: $getOwnPropertyNames,
 	  // `Object.getOwnPropertySymbols` method
-	  // https://tc39.github.io/ecma262/#sec-object.getownpropertysymbols
+	  // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
 	  getOwnPropertySymbols: $getOwnPropertySymbols
 	});
 
 	// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
 	// https://bugs.chromium.org/p/v8/issues/detail?id=3443
-	_export({ target: 'Object', stat: true, forced: fails(function () { objectGetOwnPropertySymbols.f(1); }) }, {
+	$$1b({ target: 'Object', stat: true, forced: fails$K(function () { getOwnPropertySymbolsModule$1.f(1); }) }, {
 	  getOwnPropertySymbols: function getOwnPropertySymbols(it) {
-	    return objectGetOwnPropertySymbols.f(toObject(it));
+	    return getOwnPropertySymbolsModule$1.f(toObject$e(it));
 	  }
 	});
 
 	// `JSON.stringify` method behavior with symbols
-	// https://tc39.github.io/ecma262/#sec-json.stringify
+	// https://tc39.es/ecma262/#sec-json.stringify
 	if ($stringify) {
-	  var FORCED_JSON_STRINGIFY = !nativeSymbol || fails(function () {
+	  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL$1 || fails$K(function () {
 	    var symbol = $Symbol();
 	    // MS Edge converts symbol values to JSON as {}
 	    return $stringify([symbol]) != '[null]'
@@ -1091,923 +2413,609 @@
 	      || $stringify(Object(symbol)) != '{}';
 	  });
 
-	  _export({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
-	    // eslint-disable-next-line no-unused-vars
+	  $$1b({ 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(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined
-	      if (!isArray(replacer)) replacer = function (key, value) {
-	        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
-	        if (!isSymbol(value)) return value;
+	      var args = arraySlice$a(arguments);
+	      var $replacer = replacer;
+	      if (!isObject$l(replacer) && it === undefined || isSymbol$3(it)) return; // IE8 returns string on undefined
+	      if (!isArray$6(replacer)) replacer = function (key, value) {
+	        if (isCallable$b($replacer)) value = call$j($replacer, this, key, value);
+	        if (!isSymbol$3(value)) return value;
 	      };
 	      args[1] = replacer;
-	      return $stringify.apply(null, args);
+	      return apply$8($stringify, null, args);
 	    }
 	  });
 	}
 
 	// `Symbol.prototype[@@toPrimitive]` method
-	// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive
-	if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
-	  createNonEnumerableProperty($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
+	// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
+	if (!SymbolPrototype$1[TO_PRIMITIVE]) {
+	  var valueOf = SymbolPrototype$1.valueOf;
+	  // eslint-disable-next-line no-unused-vars -- required for .length
+	  redefine$b(SymbolPrototype$1, TO_PRIMITIVE, function (hint) {
+	    // TODO: improve hint logic
+	    return call$j(valueOf, this);
+	  });
 	}
 	// `Symbol.prototype[@@toStringTag]` property
-	// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag
-	setToStringTag($Symbol, SYMBOL);
-
-	hiddenKeys[HIDDEN] = true;
-
-	var defineProperty$2 = objectDefineProperty.f;
-
+	// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
+	setToStringTag$7($Symbol, SYMBOL);
+
+	hiddenKeys$1[HIDDEN] = true;
+
+	var $$1a = _export;
+	var DESCRIPTORS$g = descriptors;
+	var global$U = global$1o;
+	var uncurryThis$F = functionUncurryThis;
+	var hasOwn$a = hasOwnProperty_1;
+	var isCallable$a = isCallable$r;
+	var isPrototypeOf$7 = objectIsPrototypeOf;
+	var toString$h = toString$k;
+	var defineProperty$9 = objectDefineProperty.f;
+	var copyConstructorProperties = copyConstructorProperties$2;
 
-	var NativeSymbol = global_1.Symbol;
+	var NativeSymbol = global$U.Symbol;
+	var SymbolPrototype = NativeSymbol && NativeSymbol.prototype;
 
-	if (descriptors && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
+	if (DESCRIPTORS$g && isCallable$a(NativeSymbol) && (!('description' in SymbolPrototype) ||
 	  // 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
+	    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : toString$h(arguments[0]);
+	    var result = isPrototypeOf$7(SymbolPrototype, this)
 	      ? 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;
+	  SymbolWrapper.prototype = SymbolPrototype;
+	  SymbolPrototype.constructor = SymbolWrapper;
 
-	  var symbolToString = symbolPrototype.toString;
-	  var native = String(NativeSymbol('test')) == 'Symbol(test)';
+	  var NATIVE_SYMBOL = String(NativeSymbol('test')) == 'Symbol(test)';
+	  var symbolToString$1 = uncurryThis$F(SymbolPrototype.toString);
+	  var symbolValueOf = uncurryThis$F(SymbolPrototype.valueOf);
 	  var regexp = /^Symbol\((.*)\)[^)]+$/;
-	  defineProperty$2(symbolPrototype, 'description', {
+	  var replace$8 = uncurryThis$F(''.replace);
+	  var stringSlice$a = uncurryThis$F(''.slice);
+
+	  defineProperty$9(SymbolPrototype, 'description', {
 	    configurable: true,
 	    get: function description() {
-	      var symbol = isObject(this) ? this.valueOf() : this;
-	      var string = symbolToString.call(symbol);
-	      if (has(EmptyStringDescriptionStore, symbol)) return '';
-	      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
+	      var symbol = symbolValueOf(this);
+	      var string = symbolToString$1(symbol);
+	      if (hasOwn$a(EmptyStringDescriptionStore, symbol)) return '';
+	      var desc = NATIVE_SYMBOL ? stringSlice$a(string, 7, -1) : replace$8(string, regexp, '$1');
 	      return desc === '' ? undefined : desc;
 	    }
 	  });
 
-	  _export({ global: true, forced: true }, {
+	  $$1a({ global: true, forced: true }, {
 	    Symbol: SymbolWrapper
 	  });
 	}
 
-	// `Symbol.iterator` well-known symbol
-	// https://tc39.github.io/ecma262/#sec-symbol.iterator
-	defineWellKnownSymbol('iterator');
-
-	var arrayMethodIsStrict = function (METHOD_NAME, argument) {
-	  var method = [][METHOD_NAME];
-	  return !!method && fails(function () {
-	    // eslint-disable-next-line no-useless-call,no-throw-literal
-	    method.call(null, argument || function () { throw 1; }, 1);
-	  });
-	};
-
-	var defineProperty$3 = Object.defineProperty;
-	var cache = {};
+	// eslint-disable-next-line es/no-typed-arrays -- safe
+	var arrayBufferNative = typeof ArrayBuffer != 'undefined' && typeof DataView != 'undefined';
 
-	var thrower = function (it) { throw it; };
+	var redefine$a = redefine$h.exports;
 
-	var arrayMethodUsesToLength = function (METHOD_NAME, options) {
-	  if (has(cache, METHOD_NAME)) return cache[METHOD_NAME];
-	  if (!options) options = {};
-	  var method = [][METHOD_NAME];
-	  var ACCESSORS = has(options, 'ACCESSORS') ? options.ACCESSORS : false;
-	  var argument0 = has(options, 0) ? options[0] : thrower;
-	  var argument1 = has(options, 1) ? options[1] : undefined;
+	var redefineAll$4 = function (target, src, options) {
+	  for (var key in src) redefine$a(target, key, src[key], options);
+	  return target;
+	};
 
-	  return cache[METHOD_NAME] = !!method && !fails(function () {
-	    if (ACCESSORS && !descriptors) return true;
-	    var O = { length: -1 };
+	var global$T = global$1o;
+	var isPrototypeOf$6 = objectIsPrototypeOf;
 
-	    if (ACCESSORS) defineProperty$3(O, 1, { enumerable: true, get: thrower });
-	    else O[1] = 1;
+	var TypeError$g = global$T.TypeError;
 
-	    method.call(O, argument0, argument1);
-	  });
+	var anInstance$7 = function (it, Prototype) {
+	  if (isPrototypeOf$6(Prototype, it)) return it;
+	  throw TypeError$g('Incorrect invocation');
 	};
 
-	var $forEach$1 = arrayIteration.forEach;
+	var global$S = global$1o;
+	var toIntegerOrInfinity$7 = toIntegerOrInfinity$b;
+	var toLength$a = toLength$c;
 
+	var RangeError$b = global$S.RangeError;
 
+	// `ToIndex` abstract operation
+	// https://tc39.es/ecma262/#sec-toindex
+	var toIndex$2 = function (it) {
+	  if (it === undefined) return 0;
+	  var number = toIntegerOrInfinity$7(it);
+	  var length = toLength$a(number);
+	  if (number !== length) throw RangeError$b('Wrong length or index');
+	  return length;
+	};
 
-	var STRICT_METHOD = arrayMethodIsStrict('forEach');
-	var USES_TO_LENGTH = arrayMethodUsesToLength('forEach');
+	// IEEE754 conversions based on https://github.com/feross/ieee754
+	var global$R = global$1o;
 
-	// `Array.prototype.forEach` method implementation
-	// https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-	var arrayForEach = (!STRICT_METHOD || !USES_TO_LENGTH) ? function forEach(callbackfn /* , thisArg */) {
-	  return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	} : [].forEach;
+	var Array$5 = global$R.Array;
+	var abs$4 = Math.abs;
+	var pow$2 = Math.pow;
+	var floor$7 = Math.floor;
+	var log$2 = Math.log;
+	var LN2 = Math.LN2;
 
-	// `Array.prototype.forEach` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-	_export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
-	  forEach: arrayForEach
-	});
+	var pack = function (number, mantissaLength, bytes) {
+	  var buffer = Array$5(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$7(log$2(number) / LN2);
+	    c = pow$2(2, -exponent);
+	    if (number * c < 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;
+	    }
+	  }
+	  while (mantissaLength >= 8) {
+	    buffer[index++] = mantissa & 255;
+	    mantissa /= 256;
+	    mantissaLength -= 8;
+	  }
+	  exponent = exponent << mantissaLength | mantissa;
+	  exponentLength += mantissaLength;
+	  while (exponentLength > 0) {
+	    buffer[index++] = exponent & 255;
+	    exponent /= 256;
+	    exponentLength -= 8;
+	  }
+	  buffer[--index] |= sign * 128;
+	  return buffer;
+	};
 
-	var $indexOf = arrayIncludes.indexOf;
+	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;
+	  while (nBits > 0) {
+	    exponent = exponent * 256 + buffer[index--];
+	    nBits -= 8;
+	  }
+	  mantissa = exponent & (1 << -nBits) - 1;
+	  exponent >>= -nBits;
+	  nBits += mantissaLength;
+	  while (nBits > 0) {
+	    mantissa = mantissa * 256 + buffer[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$9;
+	var lengthOfArrayLike$e = lengthOfArrayLike$i;
 
-	var nativeIndexOf = [].indexOf;
+	// `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 = lengthOfArrayLike$e(O);
+	  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 NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
-	var STRICT_METHOD$1 = arrayMethodIsStrict('indexOf');
-	var USES_TO_LENGTH$1 = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
+	var global$Q = global$1o;
+	var uncurryThis$E = functionUncurryThis;
+	var DESCRIPTORS$f = descriptors;
+	var NATIVE_ARRAY_BUFFER$2 = arrayBufferNative;
+	var FunctionName = functionName;
+	var createNonEnumerableProperty$5 = createNonEnumerableProperty$b;
+	var redefineAll$3 = redefineAll$4;
+	var fails$J = fails$V;
+	var anInstance$6 = anInstance$7;
+	var toIntegerOrInfinity$6 = toIntegerOrInfinity$b;
+	var toLength$9 = toLength$c;
+	var toIndex$1 = toIndex$2;
+	var IEEE754 = ieee754$2;
+	var getPrototypeOf$2 = objectGetPrototypeOf;
+	var setPrototypeOf$5 = objectSetPrototypeOf;
+	var getOwnPropertyNames$4 = objectGetOwnPropertyNames.f;
+	var defineProperty$8 = objectDefineProperty.f;
+	var arrayFill = arrayFill$1;
+	var arraySlice$9 = arraySliceSimple;
+	var setToStringTag$6 = setToStringTag$a;
+	var InternalStateModule$5 = internalState;
+
+	var PROPER_FUNCTION_NAME$2 = FunctionName.PROPER;
+	var CONFIGURABLE_FUNCTION_NAME = FunctionName.CONFIGURABLE;
+	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 ArrayBufferPrototype$1 = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
+	var $DataView = global$Q[DATA_VIEW];
+	var DataViewPrototype$1 = $DataView && $DataView[PROTOTYPE];
+	var ObjectPrototype$2 = Object.prototype;
+	var Array$4 = global$Q.Array;
+	var RangeError$a = global$Q.RangeError;
+	var fill$1 = uncurryThis$E(arrayFill);
+	var reverse = uncurryThis$E([].reverse);
 
-	// `Array.prototype.indexOf` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.indexof
-	_export({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD$1 || !USES_TO_LENGTH$1 }, {
-	  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
-	    return NEGATIVE_ZERO
-	      // convert -0 to +0
-	      ? nativeIndexOf.apply(this, arguments) || 0
-	      : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
+	var packIEEE754 = IEEE754.pack;
+	var unpackIEEE754 = IEEE754.unpack;
 
-	// `Array.isArray` method
-	// https://tc39.github.io/ecma262/#sec-array.isarray
-	_export({ target: 'Array', stat: true }, {
-	  isArray: isArray
-	});
+	var packInt8 = function (number) {
+	  return [number & 0xFF];
+	};
 
-	var UNSCOPABLES = wellKnownSymbol('unscopables');
-	var ArrayPrototype = Array.prototype;
+	var packInt16 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF];
+	};
 
-	// Array.prototype[@@unscopables]
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-	if (ArrayPrototype[UNSCOPABLES] == undefined) {
-	  objectDefineProperty.f(ArrayPrototype, UNSCOPABLES, {
-	    configurable: true,
-	    value: objectCreate(null)
-	  });
-	}
+	var packInt32 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
+	};
 
-	// add a key to Array.prototype[@@unscopables]
-	var addToUnscopables = function (key) {
-	  ArrayPrototype[UNSCOPABLES][key] = true;
+	var unpackInt32 = function (buffer) {
+	  return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
 	};
 
-	var iterators = {};
+	var packFloat32 = function (number) {
+	  return packIEEE754(number, 23, 4);
+	};
 
-	var correctPrototypeGetter = !fails(function () {
-	  function F() { /* empty */ }
-	  F.prototype.constructor = null;
-	  return Object.getPrototypeOf(new F()) !== F.prototype;
-	});
+	var packFloat64 = function (number) {
+	  return packIEEE754(number, 52, 8);
+	};
 
-	var IE_PROTO$1 = sharedKey('IE_PROTO');
-	var ObjectPrototype$1 = Object.prototype;
+	var addGetter$1 = function (Constructor, key) {
+	  defineProperty$8(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$3(this)[key]; } });
+	};
 
-	// `Object.getPrototypeOf` method
-	// https://tc39.github.io/ecma262/#sec-object.getprototypeof
-	var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
-	  O = toObject(O);
-	  if (has(O, IE_PROTO$1)) return O[IE_PROTO$1];
-	  if (typeof O.constructor == 'function' && O instanceof O.constructor) {
-	    return O.constructor.prototype;
-	  } return O instanceof Object ? ObjectPrototype$1 : null;
+	var get$4 = function (view, count, index, isLittleEndian) {
+	  var intIndex = toIndex$1(index);
+	  var store = getInternalState$3(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$a(WRONG_INDEX);
+	  var bytes = getInternalState$3(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = arraySlice$9(bytes, start, start + count);
+	  return isLittleEndian ? pack : reverse(pack);
 	};
 
-	var ITERATOR = wellKnownSymbol('iterator');
-	var BUGGY_SAFARI_ITERATORS = false;
+	var set$3 = function (view, count, index, conversion, value, isLittleEndian) {
+	  var intIndex = toIndex$1(index);
+	  var store = getInternalState$3(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$a(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];
+	};
 
-	var returnThis = function () { return this; };
+	if (!NATIVE_ARRAY_BUFFER$2) {
+	  $ArrayBuffer = function ArrayBuffer(length) {
+	    anInstance$6(this, ArrayBufferPrototype$1);
+	    var byteLength = toIndex$1(length);
+	    setInternalState$5(this, {
+	      bytes: fill$1(Array$4(byteLength), 0),
+	      byteLength: byteLength
+	    });
+	    if (!DESCRIPTORS$f) this.byteLength = byteLength;
+	  };
 
-	// `%IteratorPrototype%` object
-	// https://tc39.github.io/ecma262/#sec-%iteratorprototype%-object
-	var IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;
-
-	if ([].keys) {
-	  arrayIterator = [].keys();
-	  // Safari 8 has buggy iterators w/o `next`
-	  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;
-	  else {
-	    PrototypeOfArrayIteratorPrototype = objectGetPrototypeOf(objectGetPrototypeOf(arrayIterator));
-	    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;
-	  }
-	}
-
-	if (IteratorPrototype == undefined) IteratorPrototype = {};
-
-	// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
-	if ( !has(IteratorPrototype, ITERATOR)) {
-	  createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);
-	}
-
-	var iteratorsCore = {
-	  IteratorPrototype: IteratorPrototype,
-	  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS
-	};
-
-	var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
-
-
-
-
-
-	var returnThis$1 = function () { return this; };
-
-	var createIteratorConstructor = function (IteratorConstructor, NAME, next) {
-	  var TO_STRING_TAG = NAME + ' Iterator';
-	  IteratorConstructor.prototype = objectCreate(IteratorPrototype$1, { next: createPropertyDescriptor(1, next) });
-	  setToStringTag(IteratorConstructor, TO_STRING_TAG, false);
-	  iterators[TO_STRING_TAG] = returnThis$1;
-	  return IteratorConstructor;
-	};
-
-	var aPossiblePrototype = function (it) {
-	  if (!isObject(it) && it !== null) {
-	    throw TypeError("Can't set " + String(it) + ' as a prototype');
-	  } return it;
-	};
-
-	// `Object.setPrototypeOf` method
-	// https://tc39.github.io/ecma262/#sec-object.setprototypeof
-	// Works with __proto__ only. Old v8 can't work with null proto objects.
-	/* eslint-disable no-proto */
-	var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
-	  var CORRECT_SETTER = false;
-	  var test = {};
-	  var setter;
-	  try {
-	    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
-	    setter.call(test, []);
-	    CORRECT_SETTER = test instanceof Array;
-	  } catch (error) { /* empty */ }
-	  return function setPrototypeOf(O, proto) {
-	    anObject(O);
-	    aPossiblePrototype(proto);
-	    if (CORRECT_SETTER) setter.call(O, proto);
-	    else O.__proto__ = proto;
-	    return O;
-	  };
-	}() : undefined);
-
-	var IteratorPrototype$2 = iteratorsCore.IteratorPrototype;
-	var BUGGY_SAFARI_ITERATORS$1 = iteratorsCore.BUGGY_SAFARI_ITERATORS;
-	var ITERATOR$1 = wellKnownSymbol('iterator');
-	var KEYS = 'keys';
-	var VALUES = 'values';
-	var ENTRIES = 'entries';
-
-	var returnThis$2 = function () { return this; };
-
-	var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
-	  createIteratorConstructor(IteratorConstructor, NAME, next);
-
-	  var getIterationMethod = function (KIND) {
-	    if (KIND === DEFAULT && defaultIterator) return defaultIterator;
-	    if (!BUGGY_SAFARI_ITERATORS$1 && 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$1]
-	    || IterablePrototype['@@iterator']
-	    || DEFAULT && IterablePrototype[DEFAULT];
-	  var defaultIterator = !BUGGY_SAFARI_ITERATORS$1 && nativeIterator || getIterationMethod(DEFAULT);
-	  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
-	  var CurrentIteratorPrototype, methods, KEY;
-
-	  // fix native
-	  if (anyNativeIterator) {
-	    CurrentIteratorPrototype = objectGetPrototypeOf(anyNativeIterator.call(new Iterable()));
-	    if (IteratorPrototype$2 !== Object.prototype && CurrentIteratorPrototype.next) {
-	      if ( objectGetPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype$2) {
-	        if (objectSetPrototypeOf) {
-	          objectSetPrototypeOf(CurrentIteratorPrototype, IteratorPrototype$2);
-	        } else if (typeof CurrentIteratorPrototype[ITERATOR$1] != 'function') {
-	          createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR$1, returnThis$2);
-	        }
-	      }
-	      // Set @@toStringTag to native iterators
-	      setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true);
-	    }
-	  }
-
-	  // fix Array#{values, @@iterator}.name in V8 / FF
-	  if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
-	    INCORRECT_VALUES_NAME = true;
-	    defaultIterator = function values() { return nativeIterator.call(this); };
-	  }
-
-	  // define iterator
-	  if ( IterablePrototype[ITERATOR$1] !== defaultIterator) {
-	    createNonEnumerableProperty(IterablePrototype, ITERATOR$1, defaultIterator);
-	  }
-	  iterators[NAME] = defaultIterator;
-
-	  // 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$1 || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
-	        redefine(IterablePrototype, KEY, methods[KEY]);
-	      }
-	    } else _export({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME }, methods);
-	  }
-
-	  return methods;
-	};
-
-	var ARRAY_ITERATOR = 'Array Iterator';
-	var setInternalState$1 = internalState.set;
-	var getInternalState$1 = internalState.getterFor(ARRAY_ITERATOR);
-
-	// `Array.prototype.entries` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.entries
-	// `Array.prototype.keys` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.keys
-	// `Array.prototype.values` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.values
-	// `Array.prototype[@@iterator]` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@iterator
-	// `CreateArrayIterator` internal method
-	// https://tc39.github.io/ecma262/#sec-createarrayiterator
-	var es_array_iterator = defineIterator(Array, 'Array', function (iterated, kind) {
-	  setInternalState$1(this, {
-	    type: ARRAY_ITERATOR,
-	    target: toIndexedObject(iterated), // target
-	    index: 0,                          // next index
-	    kind: kind                         // kind
-	  });
-	// `%ArrayIteratorPrototype%.next` method
-	// https://tc39.github.io/ecma262/#sec-%arrayiteratorprototype%.next
-	}, function () {
-	  var state = getInternalState$1(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.github.io/ecma262/#sec-createunmappedargumentsobject
-	// https://tc39.github.io/ecma262/#sec-createmappedargumentsobject
-	iterators.Arguments = iterators.Array;
-
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-	addToUnscopables('keys');
-	addToUnscopables('values');
-	addToUnscopables('entries');
-
-	var nativeJoin = [].join;
-
-	var ES3_STRINGS = indexedObject != Object;
-	var STRICT_METHOD$2 = arrayMethodIsStrict('join', ',');
-
-	// `Array.prototype.join` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.join
-	_export({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$2 }, {
-	  join: function join(separator) {
-	    return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);
-	  }
-	});
-
-	var engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';
-
-	var process$1 = global_1.process;
-	var versions = process$1 && process$1.versions;
-	var v8 = versions && versions.v8;
-	var match, version;
-
-	if (v8) {
-	  match = v8.split('.');
-	  version = match[0] + match[1];
-	} else if (engineUserAgent) {
-	  match = engineUserAgent.match(/Edge\/(\d+)/);
-	  if (!match || match[1] >= 74) {
-	    match = engineUserAgent.match(/Chrome\/(\d+)/);
-	    if (match) version = match[1];
-	  }
-	}
-
-	var engineV8Version = version && +version;
-
-	var SPECIES$1 = wellKnownSymbol('species');
-
-	var arrayMethodHasSpeciesSupport = 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 engineV8Version >= 51 || !fails(function () {
-	    var array = [];
-	    var constructor = array.constructor = {};
-	    constructor[SPECIES$1] = function () {
-	      return { foo: 1 };
-	    };
-	    return array[METHOD_NAME](Boolean).foo !== 1;
-	  });
-	};
-
-	var $map = arrayIteration.map;
-
-
-
-	var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');
-	// FF49- issue
-	var USES_TO_LENGTH$2 = arrayMethodUsesToLength('map');
-
-	// `Array.prototype.map` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.map
-	// with adding support of @@species
-	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH$2 }, {
-	  map: function map(callbackfn /* , thisArg */) {
-	    return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
-
-	var createProperty = function (object, key, value) {
-	  var propertyKey = toPrimitive(key);
-	  if (propertyKey in object) objectDefineProperty.f(object, propertyKey, createPropertyDescriptor(0, value));
-	  else object[propertyKey] = value;
-	};
-
-	var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport('slice');
-	var USES_TO_LENGTH$3 = arrayMethodUsesToLength('slice', { ACCESSORS: true, 0: 0, 1: 2 });
-
-	var SPECIES$2 = wellKnownSymbol('species');
-	var nativeSlice = [].slice;
-	var max$1 = Math.max;
-
-	// `Array.prototype.slice` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.slice
-	// fallback for not array-like ES3 strings and DOM objects
-	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 || !USES_TO_LENGTH$3 }, {
-	  slice: function slice(start, end) {
-	    var O = toIndexedObject(this);
-	    var length = toLength(O.length);
-	    var k = toAbsoluteIndex(start, length);
-	    var fin = toAbsoluteIndex(end === undefined ? length : end, length);
-	    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
-	    var Constructor, result, n;
-	    if (isArray(O)) {
-	      Constructor = O.constructor;
-	      // cross-realm fallback
-	      if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {
-	        Constructor = undefined;
-	      } else if (isObject(Constructor)) {
-	        Constructor = Constructor[SPECIES$2];
-	        if (Constructor === null) Constructor = undefined;
-	      }
-	      if (Constructor === Array || Constructor === undefined) {
-	        return nativeSlice.call(O, k, fin);
-	      }
-	    }
-	    result = new (Constructor === undefined ? Array : Constructor)(max$1(fin - k, 0));
-	    for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);
-	    result.length = n;
-	    return result;
-	  }
-	});
-
-	var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';
-
-	var redefineAll = function (target, src, options) {
-	  for (var key in src) redefine(target, key, src[key], options);
-	  return target;
-	};
-
-	var anInstance = function (it, Constructor, name) {
-	  if (!(it instanceof Constructor)) {
-	    throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
-	  } return it;
-	};
-
-	// `ToIndex` abstract operation
-	// https://tc39.github.io/ecma262/#sec-toindex
-	var toIndex = function (it) {
-	  if (it === undefined) return 0;
-	  var number = toInteger(it);
-	  var length = toLength(number);
-	  if (number !== length) throw RangeError('Wrong length or index');
-	  return length;
-	};
-
-	// IEEE754 conversions based on https://github.com/feross/ieee754
-	// eslint-disable-next-line no-shadow-restricted-names
-	var Infinity$1 = 1 / 0;
-	var abs = Math.abs;
-	var pow = Math.pow;
-	var floor$1 = Math.floor;
-	var log = 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, -24) - pow(2, -77) : 0;
-	  var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
-	  var index = 0;
-	  var exponent, mantissa, c;
-	  number = abs(number);
-	  // eslint-disable-next-line no-self-compare
-	  if (number != number || number === Infinity$1) {
-	    // eslint-disable-next-line no-self-compare
-	    mantissa = number != number ? 1 : 0;
-	    exponent = eMax;
-	  } else {
-	    exponent = floor$1(log(number) / LN2);
-	    if (number * (c = pow(2, -exponent)) < 1) {
-	      exponent--;
-	      c *= 2;
-	    }
-	    if (exponent + eBias >= 1) {
-	      number += rt / c;
-	    } else {
-	      number += rt * pow(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, mantissaLength);
-	      exponent = exponent + eBias;
-	    } else {
-	      mantissa = number * pow(2, eBias - 1) * pow(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 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$1 : Infinity$1;
-	  } else {
-	    mantissa = mantissa + pow(2, mantissaLength);
-	    exponent = exponent - eBias;
-	  } return (sign ? -1 : 1) * mantissa * pow(2, exponent - mantissaLength);
-	};
-
-	var ieee754 = {
-	  pack: pack,
-	  unpack: unpack
-	};
-
-	// `Array.prototype.fill` method implementation
-	// https://tc39.github.io/ecma262/#sec-array.prototype.fill
-	var arrayFill = function fill(value /* , start = 0, end = @length */) {
-	  var O = toObject(this);
-	  var length = toLength(O.length);
-	  var argumentsLength = arguments.length;
-	  var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);
-	  var end = argumentsLength > 2 ? arguments[2] : undefined;
-	  var endPos = end === undefined ? length : toAbsoluteIndex(end, length);
-	  while (endPos > index) O[index++] = value;
-	  return O;
-	};
-
-	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
-	var defineProperty$4 = objectDefineProperty.f;
-
-
-
-
-	var getInternalState$2 = internalState.get;
-	var setInternalState$2 = internalState.set;
-	var ARRAY_BUFFER = 'ArrayBuffer';
-	var DATA_VIEW = 'DataView';
-	var PROTOTYPE$2 = 'prototype';
-	var WRONG_LENGTH = 'Wrong length';
-	var WRONG_INDEX = 'Wrong index';
-	var NativeArrayBuffer = global_1[ARRAY_BUFFER];
-	var $ArrayBuffer = NativeArrayBuffer;
-	var $DataView = global_1[DATA_VIEW];
-	var $DataViewPrototype = $DataView && $DataView[PROTOTYPE$2];
-	var ObjectPrototype$2 = Object.prototype;
-	var RangeError$1 = global_1.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 = function (Constructor, key) {
-	  defineProperty$4(Constructor[PROTOTYPE$2], key, { get: function () { return getInternalState$2(this)[key]; } });
-	};
-
-	var get$1 = function (view, count, index, isLittleEndian) {
-	  var intIndex = toIndex(index);
-	  var store = getInternalState$2(view);
-	  if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
-	  var bytes = getInternalState$2(store.buffer).bytes;
-	  var start = intIndex + store.byteOffset;
-	  var pack = bytes.slice(start, start + count);
-	  return isLittleEndian ? pack : pack.reverse();
-	};
-
-	var set$1 = function (view, count, index, conversion, value, isLittleEndian) {
-	  var intIndex = toIndex(index);
-	  var store = getInternalState$2(view);
-	  if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
-	  var bytes = getInternalState$2(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 (!arrayBufferNative) {
-	  $ArrayBuffer = function ArrayBuffer(length) {
-	    anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
-	    var byteLength = toIndex(length);
-	    setInternalState$2(this, {
-	      bytes: arrayFill.call(new Array(byteLength), 0),
-	      byteLength: byteLength
-	    });
-	    if (!descriptors) this.byteLength = byteLength;
-	  };
+	  ArrayBufferPrototype$1 = $ArrayBuffer[PROTOTYPE];
 
 	  $DataView = function DataView(buffer, byteOffset, byteLength) {
-	    anInstance(this, $DataView, DATA_VIEW);
-	    anInstance(buffer, $ArrayBuffer, DATA_VIEW);
-	    var bufferLength = getInternalState$2(buffer).byteLength;
-	    var offset = toInteger(byteOffset);
-	    if (offset < 0 || offset > bufferLength) throw RangeError$1('Wrong offset');
-	    byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
-	    if (offset + byteLength > bufferLength) throw RangeError$1(WRONG_LENGTH);
-	    setInternalState$2(this, {
+	    anInstance$6(this, DataViewPrototype$1);
+	    anInstance$6(buffer, ArrayBufferPrototype$1);
+	    var bufferLength = getInternalState$3(buffer).byteLength;
+	    var offset = toIntegerOrInfinity$6(byteOffset);
+	    if (offset < 0 || offset > bufferLength) throw RangeError$a('Wrong offset');
+	    byteLength = byteLength === undefined ? bufferLength - offset : toLength$9(byteLength);
+	    if (offset + byteLength > bufferLength) throw RangeError$a(WRONG_LENGTH$1);
+	    setInternalState$5(this, {
 	      buffer: buffer,
 	      byteLength: byteLength,
 	      byteOffset: offset
 	    });
-	    if (!descriptors) {
+	    if (!DESCRIPTORS$f) {
 	      this.buffer = buffer;
 	      this.byteLength = byteLength;
 	      this.byteOffset = offset;
 	    }
 	  };
 
-	  if (descriptors) {
-	    addGetter($ArrayBuffer, 'byteLength');
-	    addGetter($DataView, 'buffer');
-	    addGetter($DataView, 'byteLength');
-	    addGetter($DataView, 'byteOffset');
+	  DataViewPrototype$1 = $DataView[PROTOTYPE];
+
+	  if (DESCRIPTORS$f) {
+	    addGetter$1($ArrayBuffer, 'byteLength');
+	    addGetter$1($DataView, 'buffer');
+	    addGetter$1($DataView, 'byteLength');
+	    addGetter$1($DataView, 'byteOffset');
 	  }
 
-	  redefineAll($DataView[PROTOTYPE$2], {
+	  redefineAll$3(DataViewPrototype$1, {
 	    getInt8: function getInt8(byteOffset) {
-	      return get$1(this, 1, byteOffset)[0] << 24 >> 24;
+	      return get$4(this, 1, byteOffset)[0] << 24 >> 24;
 	    },
 	    getUint8: function getUint8(byteOffset) {
-	      return get$1(this, 1, byteOffset)[0];
+	      return get$4(this, 1, byteOffset)[0];
 	    },
 	    getInt16: function getInt16(byteOffset /* , littleEndian */) {
-	      var bytes = get$1(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      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$1(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      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$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
+	      return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
 	    },
 	    getUint32: function getUint32(byteOffset /* , littleEndian */) {
-	      return unpackInt32(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
+	      return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
 	    },
 	    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
-	      return unpackIEEE754(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
+	      return unpackIEEE754(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
 	    },
 	    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
-	      return unpackIEEE754(get$1(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
+	      return unpackIEEE754(get$4(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
 	    },
 	    setInt8: function setInt8(byteOffset, value) {
-	      set$1(this, 1, byteOffset, packInt8, value);
+	      set$3(this, 1, byteOffset, packInt8, value);
 	    },
 	    setUint8: function setUint8(byteOffset, value) {
-	      set$1(this, 1, byteOffset, packInt8, value);
+	      set$3(this, 1, byteOffset, packInt8, value);
 	    },
 	    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
-	      set$1(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	      set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
 	    },
 	    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
-	      set$1(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	      set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
 	    },
 	    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
-	      set$1(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	      set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
 	    },
 	    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
-	      set$1(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	      set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
 	    },
 	    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
-	      set$1(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
+	      set$3(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
 	    },
 	    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
-	      set$1(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
+	      set$3(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
 	    }
 	  });
 	} else {
-	  if (!fails(function () {
-	    NativeArrayBuffer(1);
-	  }) || !fails(function () {
-	    new NativeArrayBuffer(-1); // eslint-disable-line no-new
-	  }) || fails(function () {
-	    new NativeArrayBuffer(); // eslint-disable-line no-new
-	    new NativeArrayBuffer(1.5); // eslint-disable-line no-new
-	    new NativeArrayBuffer(NaN); // eslint-disable-line no-new
-	    return NativeArrayBuffer.name != ARRAY_BUFFER;
+	  var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME$2 && NativeArrayBuffer$1.name !== ARRAY_BUFFER$1;
+	  /* eslint-disable no-new -- required for testing */
+	  if (!fails$J(function () {
+	    NativeArrayBuffer$1(1);
+	  }) || !fails$J(function () {
+	    new NativeArrayBuffer$1(-1);
+	  }) || fails$J(function () {
+	    new NativeArrayBuffer$1();
+	    new NativeArrayBuffer$1(1.5);
+	    new NativeArrayBuffer$1(NaN);
+	    return INCORRECT_ARRAY_BUFFER_NAME && !CONFIGURABLE_FUNCTION_NAME;
 	  })) {
+	  /* eslint-enable no-new -- required for testing */
 	    $ArrayBuffer = function ArrayBuffer(length) {
-	      anInstance(this, $ArrayBuffer);
-	      return new NativeArrayBuffer(toIndex(length));
+	      anInstance$6(this, ArrayBufferPrototype$1);
+	      return new NativeArrayBuffer$1(toIndex$1(length));
 	    };
-	    var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE$2] = NativeArrayBuffer[PROTOTYPE$2];
-	    for (var keys$1 = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys$1.length > j;) {
-	      if (!((key = keys$1[j++]) in $ArrayBuffer)) {
-	        createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);
+
+	    $ArrayBuffer[PROTOTYPE] = ArrayBufferPrototype$1;
+
+	    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;
+
+	    ArrayBufferPrototype$1.constructor = $ArrayBuffer;
+	  } else if (INCORRECT_ARRAY_BUFFER_NAME && CONFIGURABLE_FUNCTION_NAME) {
+	    createNonEnumerableProperty$5(NativeArrayBuffer$1, 'name', ARRAY_BUFFER$1);
 	  }
 
 	  // WebKit bug - the same parent prototype for typed arrays and data view
-	  if (objectSetPrototypeOf && objectGetPrototypeOf($DataViewPrototype) !== ObjectPrototype$2) {
-	    objectSetPrototypeOf($DataViewPrototype, ObjectPrototype$2);
+	  if (setPrototypeOf$5 && getPrototypeOf$2(DataViewPrototype$1) !== ObjectPrototype$2) {
+	    setPrototypeOf$5(DataViewPrototype$1, ObjectPrototype$2);
 	  }
 
 	  // iOS Safari 7.x bug
 	  var testView = new $DataView(new $ArrayBuffer(2));
-	  var nativeSetInt8 = $DataViewPrototype.setInt8;
+	  var $setInt8 = uncurryThis$E(DataViewPrototype$1.setInt8);
 	  testView.setInt8(0, 2147483648);
 	  testView.setInt8(1, 2147483649);
-	  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {
+	  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll$3(DataViewPrototype$1, {
 	    setInt8: function setInt8(byteOffset, value) {
-	      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+	      $setInt8(this, byteOffset, value << 24 >> 24);
 	    },
 	    setUint8: function setUint8(byteOffset, value) {
-	      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+	      $setInt8(this, byteOffset, value << 24 >> 24);
 	    }
 	  }, { unsafe: true });
 	}
 
-	setToStringTag($ArrayBuffer, ARRAY_BUFFER);
-	setToStringTag($DataView, DATA_VIEW);
+	setToStringTag$6($ArrayBuffer, ARRAY_BUFFER$1);
+	setToStringTag$6($DataView, DATA_VIEW);
 
 	var arrayBuffer = {
 	  ArrayBuffer: $ArrayBuffer,
 	  DataView: $DataView
 	};
 
-	var SPECIES$3 = wellKnownSymbol('species');
+	var global$P = global$1o;
+	var isConstructor$2 = isConstructor$4;
+	var tryToString$3 = tryToString$5;
 
-	var setSpecies = function (CONSTRUCTOR_NAME) {
-	  var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
-	  var defineProperty = objectDefineProperty.f;
+	var TypeError$f = global$P.TypeError;
 
-	  if (descriptors && Constructor && !Constructor[SPECIES$3]) {
-	    defineProperty(Constructor, SPECIES$3, {
-	      configurable: true,
-	      get: function () { return this; }
-	    });
-	  }
+	// `Assert: IsConstructor(argument) is true`
+	var aConstructor$3 = function (argument) {
+	  if (isConstructor$2(argument)) return argument;
+	  throw TypeError$f(tryToString$3(argument) + ' is not a constructor');
 	};
 
-	var ARRAY_BUFFER$1 = 'ArrayBuffer';
-	var ArrayBuffer$1 = arrayBuffer[ARRAY_BUFFER$1];
-	var NativeArrayBuffer$1 = global_1[ARRAY_BUFFER$1];
-
-	// `ArrayBuffer` constructor
-	// https://tc39.github.io/ecma262/#sec-arraybuffer-constructor
-	_export({ global: true, forced: NativeArrayBuffer$1 !== ArrayBuffer$1 }, {
-	  ArrayBuffer: ArrayBuffer$1
-	});
-
-	setSpecies(ARRAY_BUFFER$1);
+	var anObject$g = anObject$n;
+	var aConstructor$2 = aConstructor$3;
+	var wellKnownSymbol$h = wellKnownSymbol$t;
 
-	var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');
-	var test = {};
+	var SPECIES$5 = wellKnownSymbol$h('species');
 
-	test[TO_STRING_TAG$1] = 'z';
-
-	var toStringTagSupport = String(test) === '[object z]';
-
-	var TO_STRING_TAG$2 = wellKnownSymbol('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 = toStringTagSupport ? 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;
+	// `SpeciesConstructor` abstract operation
+	// https://tc39.es/ecma262/#sec-speciesconstructor
+	var speciesConstructor$5 = function (O, defaultConstructor) {
+	  var C = anObject$g(O).constructor;
+	  var S;
+	  return C === undefined || (S = anObject$g(C)[SPECIES$5]) == undefined ? defaultConstructor : aConstructor$2(S);
 	};
 
-	var defineProperty$5 = objectDefineProperty.f;
-
+	var $$19 = _export;
+	var uncurryThis$D = functionUncurryThis;
+	var fails$I = fails$V;
+	var ArrayBufferModule$2 = arrayBuffer;
+	var anObject$f = anObject$n;
+	var toAbsoluteIndex$5 = toAbsoluteIndex$9;
+	var toLength$8 = toLength$c;
+	var speciesConstructor$4 = speciesConstructor$5;
+
+	var ArrayBuffer$4 = ArrayBufferModule$2.ArrayBuffer;
+	var DataView$2 = ArrayBufferModule$2.DataView;
+	var DataViewPrototype = DataView$2.prototype;
+	var un$ArrayBufferSlice = uncurryThis$D(ArrayBuffer$4.prototype.slice);
+	var getUint8 = uncurryThis$D(DataViewPrototype.getUint8);
+	var setUint8 = uncurryThis$D(DataViewPrototype.setUint8);
+
+	var INCORRECT_SLICE = fails$I(function () {
+	  return !new ArrayBuffer$4(2).slice(1, undefined).byteLength;
+	});
 
+	// `ArrayBuffer.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
+	$$19({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+	  slice: function slice(start, end) {
+	    if (un$ArrayBufferSlice && end === undefined) {
+	      return un$ArrayBufferSlice(anObject$f(this), start); // FF fix
+	    }
+	    var length = anObject$f(this).byteLength;
+	    var first = toAbsoluteIndex$5(start, length);
+	    var fin = toAbsoluteIndex$5(end === undefined ? length : end, length);
+	    var result = new (speciesConstructor$4(this, ArrayBuffer$4))(toLength$8(fin - first));
+	    var viewSource = new DataView$2(this);
+	    var viewTarget = new DataView$2(result);
+	    var index = 0;
+	    while (first < fin) {
+	      setUint8(viewTarget, index++, getUint8(viewSource, first++));
+	    } return result;
+	  }
+	});
 
+	var $$18 = _export;
+	var ArrayBufferModule$1 = arrayBuffer;
+	var NATIVE_ARRAY_BUFFER$1 = arrayBufferNative;
 
+	// `DataView` constructor
+	// https://tc39.es/ecma262/#sec-dataview-constructor
+	$$18({ global: true, forced: !NATIVE_ARRAY_BUFFER$1 }, {
+	  DataView: ArrayBufferModule$1.DataView
+	});
 
-	var Int8Array$1 = global_1.Int8Array;
-	var Int8ArrayPrototype = Int8Array$1 && Int8Array$1.prototype;
-	var Uint8ClampedArray = global_1.Uint8ClampedArray;
-	var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
-	var TypedArray = Int8Array$1 && objectGetPrototypeOf(Int8Array$1);
-	var TypedArrayPrototype = Int8ArrayPrototype && objectGetPrototypeOf(Int8ArrayPrototype);
-	var ObjectPrototype$3 = Object.prototype;
-	var isPrototypeOf = ObjectPrototype$3.isPrototypeOf;
+	var NATIVE_ARRAY_BUFFER = arrayBufferNative;
+	var DESCRIPTORS$e = descriptors;
+	var global$O = global$1o;
+	var isCallable$9 = isCallable$r;
+	var isObject$k = isObject$s;
+	var hasOwn$9 = hasOwnProperty_1;
+	var classof$7 = classof$d;
+	var tryToString$2 = tryToString$5;
+	var createNonEnumerableProperty$4 = createNonEnumerableProperty$b;
+	var redefine$9 = redefine$h.exports;
+	var defineProperty$7 = objectDefineProperty.f;
+	var isPrototypeOf$5 = objectIsPrototypeOf;
+	var getPrototypeOf$1 = objectGetPrototypeOf;
+	var setPrototypeOf$4 = objectSetPrototypeOf;
+	var wellKnownSymbol$g = wellKnownSymbol$t;
+	var uid$1 = uid$5;
+
+	var Int8Array$4 = global$O.Int8Array;
+	var Int8ArrayPrototype$1 = Int8Array$4 && Int8Array$4.prototype;
+	var Uint8ClampedArray$1 = global$O.Uint8ClampedArray;
+	var Uint8ClampedArrayPrototype = Uint8ClampedArray$1 && Uint8ClampedArray$1.prototype;
+	var TypedArray$1 = Int8Array$4 && getPrototypeOf$1(Int8Array$4);
+	var TypedArrayPrototype$2 = Int8ArrayPrototype$1 && getPrototypeOf$1(Int8ArrayPrototype$1);
+	var ObjectPrototype$1 = Object.prototype;
+	var TypeError$e = global$O.TypeError;
 
-	var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
-	var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
+	var TO_STRING_TAG = wellKnownSymbol$g('toStringTag');
+	var TYPED_ARRAY_TAG$1 = uid$1('TYPED_ARRAY_TAG');
+	var TYPED_ARRAY_CONSTRUCTOR$2 = uid$1('TYPED_ARRAY_CONSTRUCTOR');
 	// Fixing native typed arrays in Opera Presto crashes the browser, see #595
-	var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferNative && !!objectSetPrototypeOf && classof(global_1.opera) !== 'Opera';
-	var TYPED_ARRAY_TAG_REQIRED = false;
-	var NAME;
+	var NATIVE_ARRAY_BUFFER_VIEWS$3 = NATIVE_ARRAY_BUFFER && !!setPrototypeOf$4 && classof$7(global$O.opera) !== 'Opera';
+	var TYPED_ARRAY_TAG_REQUIRED = false;
+	var NAME$1, Constructor, Prototype;
 
 	var TypedArrayConstructorsList = {
 	  Int8Array: 1,
@@ -2021,347 +3029,744 @@
 	  Float64Array: 8
 	};
 
+	var BigIntArrayConstructorsList = {
+	  BigInt64Array: 8,
+	  BigUint64Array: 8
+	};
+
 	var isView = function isView(it) {
-	  var klass = classof(it);
-	  return klass === 'DataView' || has(TypedArrayConstructorsList, klass);
+	  if (!isObject$k(it)) return false;
+	  var klass = classof$7(it);
+	  return klass === 'DataView'
+	    || hasOwn$9(TypedArrayConstructorsList, klass)
+	    || hasOwn$9(BigIntArrayConstructorsList, klass);
 	};
 
-	var isTypedArray = function (it) {
-	  return isObject(it) && has(TypedArrayConstructorsList, classof(it));
+	var isTypedArray$1 = function (it) {
+	  if (!isObject$k(it)) return false;
+	  var klass = classof$7(it);
+	  return hasOwn$9(TypedArrayConstructorsList, klass)
+	    || hasOwn$9(BigIntArrayConstructorsList, klass);
 	};
 
-	var aTypedArray = function (it) {
-	  if (isTypedArray(it)) return it;
-	  throw TypeError('Target is not a typed array');
+	var aTypedArray$m = function (it) {
+	  if (isTypedArray$1(it)) return it;
+	  throw TypeError$e('Target is not a typed array');
 	};
 
-	var aTypedArrayConstructor = function (C) {
-	  if (objectSetPrototypeOf) {
-	    if (isPrototypeOf.call(TypedArray, C)) return C;
-	  } else for (var ARRAY in TypedArrayConstructorsList) if (has(TypedArrayConstructorsList, NAME)) {
-	    var TypedArrayConstructor = global_1[ARRAY];
-	    if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
-	      return C;
-	    }
-	  } throw TypeError('Target is not a typed array constructor');
+	var aTypedArrayConstructor$3 = function (C) {
+	  if (isCallable$9(C) && (!setPrototypeOf$4 || isPrototypeOf$5(TypedArray$1, C))) return C;
+	  throw TypeError$e(tryToString$2(C) + ' is not a typed array constructor');
 	};
 
-	var exportTypedArrayMethod = function (KEY, property, forced) {
-	  if (!descriptors) return;
+	var exportTypedArrayMethod$n = function (KEY, property, forced, options) {
+	  if (!DESCRIPTORS$e) return;
 	  if (forced) for (var ARRAY in TypedArrayConstructorsList) {
-	    var TypedArrayConstructor = global_1[ARRAY];
-	    if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {
+	    var TypedArrayConstructor = global$O[ARRAY];
+	    if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor.prototype, KEY)) try {
 	      delete TypedArrayConstructor.prototype[KEY];
+	    } catch (error) {
+	      // old WebKit bug - some methods are non-configurable
+	      try {
+	        TypedArrayConstructor.prototype[KEY] = property;
+	      } catch (error2) { /* empty */ }
 	    }
 	  }
-	  if (!TypedArrayPrototype[KEY] || forced) {
-	    redefine(TypedArrayPrototype, KEY, forced ? property
-	      : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
+	  if (!TypedArrayPrototype$2[KEY] || forced) {
+	    redefine$9(TypedArrayPrototype$2, KEY, forced ? property
+	      : NATIVE_ARRAY_BUFFER_VIEWS$3 && Int8ArrayPrototype$1[KEY] || property, options);
 	  }
 	};
 
-	var exportTypedArrayStaticMethod = function (KEY, property, forced) {
+	var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
 	  var ARRAY, TypedArrayConstructor;
-	  if (!descriptors) return;
-	  if (objectSetPrototypeOf) {
+	  if (!DESCRIPTORS$e) return;
+	  if (setPrototypeOf$4) {
 	    if (forced) for (ARRAY in TypedArrayConstructorsList) {
-	      TypedArrayConstructor = global_1[ARRAY];
-	      if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {
+	      TypedArrayConstructor = global$O[ARRAY];
+	      if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor, KEY)) try {
 	        delete TypedArrayConstructor[KEY];
-	      }
+	      } catch (error) { /* empty */ }
 	    }
-	    if (!TypedArray[KEY] || forced) {
+	    if (!TypedArray$1[KEY] || forced) {
 	      // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
 	      try {
-	        return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && Int8Array$1[KEY] || property);
+	        return redefine$9(TypedArray$1, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$3 && TypedArray$1[KEY] || property);
 	      } catch (error) { /* empty */ }
 	    } else return;
 	  }
 	  for (ARRAY in TypedArrayConstructorsList) {
-	    TypedArrayConstructor = global_1[ARRAY];
+	    TypedArrayConstructor = global$O[ARRAY];
 	    if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
-	      redefine(TypedArrayConstructor, KEY, property);
+	      redefine$9(TypedArrayConstructor, KEY, property);
 	    }
 	  }
 	};
 
-	for (NAME in TypedArrayConstructorsList) {
-	  if (!global_1[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;
+	for (NAME$1 in TypedArrayConstructorsList) {
+	  Constructor = global$O[NAME$1];
+	  Prototype = Constructor && Constructor.prototype;
+	  if (Prototype) createNonEnumerableProperty$4(Prototype, TYPED_ARRAY_CONSTRUCTOR$2, Constructor);
+	  else NATIVE_ARRAY_BUFFER_VIEWS$3 = false;
+	}
+
+	for (NAME$1 in BigIntArrayConstructorsList) {
+	  Constructor = global$O[NAME$1];
+	  Prototype = Constructor && Constructor.prototype;
+	  if (Prototype) createNonEnumerableProperty$4(Prototype, TYPED_ARRAY_CONSTRUCTOR$2, Constructor);
 	}
 
 	// WebKit bug - typed arrays constructors prototype is Object.prototype
-	if (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
-	  // eslint-disable-next-line no-shadow
-	  TypedArray = function TypedArray() {
-	    throw TypeError('Incorrect invocation');
+	if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !isCallable$9(TypedArray$1) || TypedArray$1 === Function.prototype) {
+	  // eslint-disable-next-line no-shadow -- safe
+	  TypedArray$1 = function TypedArray() {
+	    throw TypeError$e('Incorrect invocation');
 	  };
-	  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
-	    if (global_1[NAME]) objectSetPrototypeOf(global_1[NAME], TypedArray);
+	  if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+	    if (global$O[NAME$1]) setPrototypeOf$4(global$O[NAME$1], TypedArray$1);
 	  }
 	}
 
-	if (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype$3) {
-	  TypedArrayPrototype = TypedArray.prototype;
-	  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
-	    if (global_1[NAME]) objectSetPrototypeOf(global_1[NAME].prototype, TypedArrayPrototype);
+	if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !TypedArrayPrototype$2 || TypedArrayPrototype$2 === ObjectPrototype$1) {
+	  TypedArrayPrototype$2 = TypedArray$1.prototype;
+	  if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+	    if (global$O[NAME$1]) setPrototypeOf$4(global$O[NAME$1].prototype, TypedArrayPrototype$2);
 	  }
 	}
 
 	// WebKit bug - one more object in Uint8ClampedArray prototype chain
-	if (NATIVE_ARRAY_BUFFER_VIEWS && objectGetPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
-	  objectSetPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
+	if (NATIVE_ARRAY_BUFFER_VIEWS$3 && getPrototypeOf$1(Uint8ClampedArrayPrototype) !== TypedArrayPrototype$2) {
+	  setPrototypeOf$4(Uint8ClampedArrayPrototype, TypedArrayPrototype$2);
 	}
 
-	if (descriptors && !has(TypedArrayPrototype, TO_STRING_TAG$3)) {
-	  TYPED_ARRAY_TAG_REQIRED = true;
-	  defineProperty$5(TypedArrayPrototype, TO_STRING_TAG$3, { get: function () {
-	    return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
+	if (DESCRIPTORS$e && !hasOwn$9(TypedArrayPrototype$2, TO_STRING_TAG)) {
+	  TYPED_ARRAY_TAG_REQUIRED = true;
+	  defineProperty$7(TypedArrayPrototype$2, TO_STRING_TAG, { get: function () {
+	    return isObject$k(this) ? this[TYPED_ARRAY_TAG$1] : undefined;
 	  } });
-	  for (NAME in TypedArrayConstructorsList) if (global_1[NAME]) {
-	    createNonEnumerableProperty(global_1[NAME], TYPED_ARRAY_TAG, NAME);
+	  for (NAME$1 in TypedArrayConstructorsList) if (global$O[NAME$1]) {
+	    createNonEnumerableProperty$4(global$O[NAME$1], TYPED_ARRAY_TAG$1, NAME$1);
 	  }
 	}
 
 	var arrayBufferViewCore = {
-	  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,
-	  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
-	  aTypedArray: aTypedArray,
-	  aTypedArrayConstructor: aTypedArrayConstructor,
-	  exportTypedArrayMethod: exportTypedArrayMethod,
-	  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
+	  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$3,
+	  TYPED_ARRAY_CONSTRUCTOR: TYPED_ARRAY_CONSTRUCTOR$2,
+	  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQUIRED && TYPED_ARRAY_TAG$1,
+	  aTypedArray: aTypedArray$m,
+	  aTypedArrayConstructor: aTypedArrayConstructor$3,
+	  exportTypedArrayMethod: exportTypedArrayMethod$n,
+	  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
 	  isView: isView,
-	  isTypedArray: isTypedArray,
-	  TypedArray: TypedArray,
-	  TypedArrayPrototype: TypedArrayPrototype
+	  isTypedArray: isTypedArray$1,
+	  TypedArray: TypedArray$1,
+	  TypedArrayPrototype: TypedArrayPrototype$2
 	};
 
-	var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+	var $$17 = _export;
+	var ArrayBufferViewCore$o = arrayBufferViewCore;
+
+	var NATIVE_ARRAY_BUFFER_VIEWS$2 = ArrayBufferViewCore$o.NATIVE_ARRAY_BUFFER_VIEWS;
 
 	// `ArrayBuffer.isView` method
-	// https://tc39.github.io/ecma262/#sec-arraybuffer.isview
-	_export({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$1 }, {
-	  isView: arrayBufferViewCore.isView
+	// https://tc39.es/ecma262/#sec-arraybuffer.isview
+	$$17({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$2 }, {
+	  isView: ArrayBufferViewCore$o.isView
 	});
 
-	var SPECIES$4 = wellKnownSymbol('species');
-
-	// `SpeciesConstructor` abstract operation
-	// https://tc39.github.io/ecma262/#sec-speciesconstructor
-	var speciesConstructor = function (O, defaultConstructor) {
-	  var C = anObject(O).constructor;
-	  var S;
-	  return C === undefined || (S = anObject(C)[SPECIES$4]) == undefined ? defaultConstructor : aFunction$1(S);
-	};
+	var getBuiltIn$4 = getBuiltIn$b;
+	var definePropertyModule$1 = objectDefineProperty;
+	var wellKnownSymbol$f = wellKnownSymbol$t;
+	var DESCRIPTORS$d = descriptors;
 
-	var ArrayBuffer$2 = arrayBuffer.ArrayBuffer;
-	var DataView$1 = arrayBuffer.DataView;
-	var nativeArrayBufferSlice = ArrayBuffer$2.prototype.slice;
+	var SPECIES$4 = wellKnownSymbol$f('species');
 
-	var INCORRECT_SLICE = fails(function () {
-	  return !new ArrayBuffer$2(2).slice(1, undefined).byteLength;
-	});
+	var setSpecies$5 = function (CONSTRUCTOR_NAME) {
+	  var Constructor = getBuiltIn$4(CONSTRUCTOR_NAME);
+	  var defineProperty = definePropertyModule$1.f;
 
-	// `ArrayBuffer.prototype.slice` method
-	// https://tc39.github.io/ecma262/#sec-arraybuffer.prototype.slice
-	_export({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
-	  slice: function slice(start, end) {
-	    if (nativeArrayBufferSlice !== undefined && end === undefined) {
-	      return nativeArrayBufferSlice.call(anObject(this), start); // FF fix
-	    }
-	    var length = anObject(this).byteLength;
-	    var first = toAbsoluteIndex(start, length);
-	    var fin = toAbsoluteIndex(end === undefined ? length : end, length);
-	    var result = new (speciesConstructor(this, ArrayBuffer$2))(toLength(fin - first));
-	    var viewSource = new DataView$1(this);
-	    var viewTarget = new DataView$1(result);
-	    var index = 0;
-	    while (first < fin) {
-	      viewTarget.setUint8(index++, viewSource.getUint8(first++));
-	    } return result;
+	  if (DESCRIPTORS$d && Constructor && !Constructor[SPECIES$4]) {
+	    defineProperty(Constructor, SPECIES$4, {
+	      configurable: true,
+	      get: function () { return this; }
+	    });
 	  }
-	});
+	};
 
-	// `DataView` constructor
-	// https://tc39.github.io/ecma262/#sec-dataview-constructor
-	_export({ global: true, forced: !arrayBufferNative }, {
-	  DataView: arrayBuffer.DataView
+	var $$16 = _export;
+	var global$N = global$1o;
+	var arrayBufferModule = arrayBuffer;
+	var setSpecies$4 = setSpecies$5;
+
+	var ARRAY_BUFFER = 'ArrayBuffer';
+	var ArrayBuffer$3 = arrayBufferModule[ARRAY_BUFFER];
+	var NativeArrayBuffer = global$N[ARRAY_BUFFER];
+
+	// `ArrayBuffer` constructor
+	// https://tc39.es/ecma262/#sec-arraybuffer-constructor
+	$$16({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$3 }, {
+	  ArrayBuffer: ArrayBuffer$3
 	});
 
-	var defineProperty$6 = objectDefineProperty.f;
+	setSpecies$4(ARRAY_BUFFER);
 
-	var FunctionPrototype = Function.prototype;
-	var FunctionPrototypeToString = FunctionPrototype.toString;
-	var nameRE = /^\s*function ([^ (]*)/;
-	var NAME$1 = 'name';
+	var fails$H = fails$V;
 
-	// Function instances `.name` property
-	// https://tc39.github.io/ecma262/#sec-function-instances-name
-	if (descriptors && !(NAME$1 in FunctionPrototype)) {
-	  defineProperty$6(FunctionPrototype, NAME$1, {
-	    configurable: true,
-	    get: function () {
-	      try {
-	        return FunctionPrototypeToString.call(this).match(nameRE)[1];
-	      } catch (error) {
-	        return '';
-	      }
-	    }
+	var arrayMethodIsStrict$9 = function (METHOD_NAME, argument) {
+	  var method = [][METHOD_NAME];
+	  return !!method && fails$H(function () {
+	    // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
+	    method.call(null, argument || function () { throw 1; }, 1);
 	  });
-	}
+	};
 
-	// `Object.create` method
-	// https://tc39.github.io/ecma262/#sec-object.create
-	_export({ target: 'Object', stat: true, sham: !descriptors }, {
-	  create: objectCreate
-	});
+	/* eslint-disable es/no-array-prototype-indexof -- required for testing */
+	var $$15 = _export;
+	var uncurryThis$C = functionUncurryThis;
+	var $IndexOf = arrayIncludes.indexOf;
+	var arrayMethodIsStrict$8 = arrayMethodIsStrict$9;
 
-	var nativeGetOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;
+	var un$IndexOf = uncurryThis$C([].indexOf);
 
-	var FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });
+	var NEGATIVE_ZERO$1 = !!un$IndexOf && 1 / un$IndexOf([1], 1, -0) < 0;
+	var STRICT_METHOD$8 = arrayMethodIsStrict$8('indexOf');
 
-	// `Object.getOwnPropertyNames` method
-	// https://tc39.github.io/ecma262/#sec-object.getownpropertynames
-	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {
-	  getOwnPropertyNames: nativeGetOwnPropertyNames$2
+	// `Array.prototype.indexOf` method
+	// https://tc39.es/ecma262/#sec-array.prototype.indexof
+	$$15({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$8 }, {
+	  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+	    var fromIndex = arguments.length > 1 ? arguments[1] : undefined;
+	    return NEGATIVE_ZERO$1
+	      // convert -0 to +0
+	      ? un$IndexOf(this, searchElement, fromIndex) || 0
+	      : $IndexOf(this, searchElement, fromIndex);
+	  }
 	});
 
-	// `Object.prototype.toString` method implementation
-	// https://tc39.github.io/ecma262/#sec-object.prototype.tostring
-	var objectToString = toStringTagSupport ? {}.toString : function toString() {
-	  return '[object ' + classof(this) + ']';
+	var anObject$e = anObject$n;
+
+	// `RegExp.prototype.flags` getter implementation
+	// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+	var regexpFlags$1 = function () {
+	  var that = anObject$e(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;
 	};
 
-	// `Object.prototype.toString` method
-	// https://tc39.github.io/ecma262/#sec-object.prototype.tostring
-	if (!toStringTagSupport) {
-	  redefine(Object.prototype, 'toString', objectToString, { unsafe: true });
-	}
+	var fails$G = fails$V;
+	var global$M = global$1o;
 
-	var nativePromiseConstructor = global_1.Promise;
+	// babel-minify and Closure Compiler transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
+	var $RegExp$2 = global$M.RegExp;
 
-	var ITERATOR$2 = wellKnownSymbol('iterator');
-	var ArrayPrototype$1 = Array.prototype;
+	var UNSUPPORTED_Y$3 = fails$G(function () {
+	  var re = $RegExp$2('a', 'y');
+	  re.lastIndex = 2;
+	  return re.exec('abcd') != null;
+	});
 
-	// check on default Array iterator
-	var isArrayIteratorMethod = function (it) {
-	  return it !== undefined && (iterators.Array === it || ArrayPrototype$1[ITERATOR$2] === it);
-	};
+	// UC Browser bug
+	// https://github.com/zloirock/core-js/issues/1008
+	var MISSED_STICKY$1 = UNSUPPORTED_Y$3 || fails$G(function () {
+	  return !$RegExp$2('a', 'y').sticky;
+	});
 
-	var ITERATOR$3 = wellKnownSymbol('iterator');
+	var BROKEN_CARET = UNSUPPORTED_Y$3 || fails$G(function () {
+	  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+	  var re = $RegExp$2('^r', 'gy');
+	  re.lastIndex = 2;
+	  return re.exec('str') != null;
+	});
 
-	var getIteratorMethod = function (it) {
-	  if (it != undefined) return it[ITERATOR$3]
-	    || it['@@iterator']
-	    || iterators[classof(it)];
+	var regexpStickyHelpers = {
+	  BROKEN_CARET: BROKEN_CARET,
+	  MISSED_STICKY: MISSED_STICKY$1,
+	  UNSUPPORTED_Y: UNSUPPORTED_Y$3
 	};
 
-	// call something on iterator step with safe closing on error
-	var callWithSafeIterationClosing = function (iterator, fn, value, ENTRIES) {
-	  try {
-	    return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);
-	  // 7.4.6 IteratorClose(iterator, completion)
-	  } catch (error) {
-	    var returnMethod = iterator['return'];
-	    if (returnMethod !== undefined) anObject(returnMethod.call(iterator));
-	    throw error;
-	  }
-	};
+	var fails$F = fails$V;
+	var global$L = global$1o;
 
-	var iterate_1 = createCommonjsModule(function (module) {
-	var Result = function (stopped, result) {
-	  this.stopped = stopped;
-	  this.result = result;
-	};
+	// babel-minify and Closure Compiler transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+	var $RegExp$1 = global$L.RegExp;
 
-	var iterate = module.exports = function (iterable, fn, that, AS_ENTRIES, IS_ITERATOR) {
-	  var boundFunction = functionBindContext(fn, that, AS_ENTRIES ? 2 : 1);
-	  var iterator, iterFn, index, length, result, next, step;
+	var regexpUnsupportedDotAll = fails$F(function () {
+	  var re = $RegExp$1('.', 's');
+	  return !(re.dotAll && re.exec('\n') && re.flags === 's');
+	});
 
-	  if (IS_ITERATOR) {
-	    iterator = iterable;
-	  } else {
-	    iterFn = getIteratorMethod(iterable);
-	    if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
-	    // optimisation for array iterators
-	    if (isArrayIteratorMethod(iterFn)) {
-	      for (index = 0, length = toLength(iterable.length); length > index; index++) {
-	        result = AS_ENTRIES
-	          ? boundFunction(anObject(step = iterable[index])[0], step[1])
-	          : boundFunction(iterable[index]);
-	        if (result && result instanceof Result) return result;
-	      } return new Result(false);
-	    }
-	    iterator = iterFn.call(iterable);
-	  }
+	var fails$E = fails$V;
+	var global$K = global$1o;
 
-	  next = iterator.next;
-	  while (!(step = next.call(iterator)).done) {
-	    result = callWithSafeIterationClosing(iterator, boundFunction, step.value, AS_ENTRIES);
-	    if (typeof result == 'object' && result && result instanceof Result) return result;
-	  } return new Result(false);
-	};
+	// babel-minify and Closure Compiler transpiles RegExp('(?<a>b)', 'g') -> /(?<a>b)/g and it causes SyntaxError
+	var $RegExp = global$K.RegExp;
 
-	iterate.stop = function (result) {
-	  return new Result(true, result);
-	};
+	var regexpUnsupportedNcg = fails$E(function () {
+	  var re = $RegExp('(?<a>b)', 'g');
+	  return re.exec('b').groups.a !== 'b' ||
+	    'b'.replace(re, '$<a>c') !== 'bc';
 	});
 
-	var ITERATOR$4 = wellKnownSymbol('iterator');
-	var SAFE_CLOSING = false;
+	/* eslint-disable regexp/no-empty-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
+	/* eslint-disable regexp/no-useless-quantifier -- testing */
+	var call$i = functionCall;
+	var uncurryThis$B = functionUncurryThis;
+	var toString$g = toString$k;
+	var regexpFlags = regexpFlags$1;
+	var stickyHelpers$2 = regexpStickyHelpers;
+	var shared = shared$5.exports;
+	var create$8 = objectCreate;
+	var getInternalState$2 = internalState.get;
+	var UNSUPPORTED_DOT_ALL$1 = regexpUnsupportedDotAll;
+	var UNSUPPORTED_NCG$1 = regexpUnsupportedNcg;
 
-	try {
-	  var called = 0;
-	  var iteratorWithReturn = {
-	    next: function () {
-	      return { done: !!called++ };
-	    },
-	    'return': function () {
-	      SAFE_CLOSING = true;
-	    }
-	  };
-	  iteratorWithReturn[ITERATOR$4] = function () {
-	    return this;
-	  };
-	  // eslint-disable-next-line no-throw-literal
-	  Array.from(iteratorWithReturn, function () { throw 2; });
-	} catch (error) { /* empty */ }
+	var nativeReplace = shared('native-string-replace', String.prototype.replace);
+	var nativeExec = RegExp.prototype.exec;
+	var patchedExec = nativeExec;
+	var charAt$6 = uncurryThis$B(''.charAt);
+	var indexOf = uncurryThis$B(''.indexOf);
+	var replace$7 = uncurryThis$B(''.replace);
+	var stringSlice$9 = uncurryThis$B(''.slice);
 
-	var checkCorrectnessOfIteration = function (exec, SKIP_CLOSING) {
-	  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
-	  var ITERATION_SUPPORT = false;
-	  try {
-	    var object = {};
-	    object[ITERATOR$4] = function () {
-	      return {
-	        next: function () {
-	          return { done: ITERATION_SUPPORT = true };
-	        }
-	      };
-	    };
-	    exec(object);
-	  } catch (error) { /* empty */ }
-	  return ITERATION_SUPPORT;
-	};
+	var UPDATES_LAST_INDEX_WRONG = (function () {
+	  var re1 = /a/;
+	  var re2 = /b*/g;
+	  call$i(nativeExec, re1, 'a');
+	  call$i(nativeExec, re2, 'a');
+	  return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+	})();
 
-	var engineIsIos = /(iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);
+	var UNSUPPORTED_Y$2 = stickyHelpers$2.BROKEN_CARET;
 
-	var location$1 = global_1.location;
-	var set$2 = global_1.setImmediate;
-	var clear = global_1.clearImmediate;
-	var process$2 = global_1.process;
-	var MessageChannel = global_1.MessageChannel;
-	var Dispatch = global_1.Dispatch;
-	var counter = 0;
-	var queue = {};
-	var ONREADYSTATECHANGE = 'onreadystatechange';
-	var defer, channel, port;
+	// nonparticipating capturing group, copied from es5-shim's String#split patch.
+	var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
 
-	var run = function (id) {
-	  // eslint-disable-next-line no-prototype-builtins
-	  if (queue.hasOwnProperty(id)) {
-	    var fn = queue[id];
-	    delete queue[id];
-	    fn();
+	var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || UNSUPPORTED_DOT_ALL$1 || UNSUPPORTED_NCG$1;
+
+	if (PATCH) {
+	  patchedExec = function exec(string) {
+	    var re = this;
+	    var state = getInternalState$2(re);
+	    var str = toString$g(string);
+	    var raw = state.raw;
+	    var result, reCopy, lastIndex, match, i, object, group;
+
+	    if (raw) {
+	      raw.lastIndex = re.lastIndex;
+	      result = call$i(patchedExec, raw, str);
+	      re.lastIndex = raw.lastIndex;
+	      return result;
+	    }
+
+	    var groups = state.groups;
+	    var sticky = UNSUPPORTED_Y$2 && re.sticky;
+	    var flags = call$i(regexpFlags, re);
+	    var source = re.source;
+	    var charsAdded = 0;
+	    var strCopy = str;
+
+	    if (sticky) {
+	      flags = replace$7(flags, 'y', '');
+	      if (indexOf(flags, 'g') === -1) {
+	        flags += 'g';
+	      }
+
+	      strCopy = stringSlice$9(str, re.lastIndex);
+	      // Support anchored sticky behavior.
+	      if (re.lastIndex > 0 && (!re.multiline || re.multiline && charAt$6(str, re.lastIndex - 1) !== '\n')) {
+	        source = '(?: ' + source + ')';
+	        strCopy = ' ' + strCopy;
+	        charsAdded++;
+	      }
+	      // ^(? + rx + ) is needed, in combination with some str slicing, to
+	      // simulate the 'y' flag.
+	      reCopy = new RegExp('^(?:' + source + ')', flags);
+	    }
+
+	    if (NPCG_INCLUDED) {
+	      reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+	    }
+	    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
+
+	    match = call$i(nativeExec, sticky ? reCopy : re, strCopy);
+
+	    if (sticky) {
+	      if (match) {
+	        match.input = stringSlice$9(match.input, charsAdded);
+	        match[0] = stringSlice$9(match[0], charsAdded);
+	        match.index = re.lastIndex;
+	        re.lastIndex += match[0].length;
+	      } else re.lastIndex = 0;
+	    } else if (UPDATES_LAST_INDEX_WRONG && match) {
+	      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+	    }
+	    if (NPCG_INCLUDED && match && match.length > 1) {
+	      // Fix browsers whose `exec` methods don't consistently return `undefined`
+	      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+	      call$i(nativeReplace, 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$8(null);
+	      for (i = 0; i < groups.length; i++) {
+	        group = groups[i];
+	        object[group[0]] = match[group[1]];
+	      }
+	    }
+
+	    return match;
+	  };
+	}
+
+	var regexpExec$3 = patchedExec;
+
+	var $$14 = _export;
+	var exec$5 = regexpExec$3;
+
+	// `RegExp.prototype.exec` method
+	// https://tc39.es/ecma262/#sec-regexp.prototype.exec
+	$$14({ target: 'RegExp', proto: true, forced: /./.exec !== exec$5 }, {
+	  exec: exec$5
+	});
+
+	var fails$D = fails$V;
+	var wellKnownSymbol$e = wellKnownSymbol$t;
+	var V8_VERSION$2 = engineV8Version;
+
+	var SPECIES$3 = wellKnownSymbol$e('species');
+
+	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$2 >= 51 || !fails$D(function () {
+	    var array = [];
+	    var constructor = array.constructor = {};
+	    constructor[SPECIES$3] = function () {
+	      return { foo: 1 };
+	    };
+	    return array[METHOD_NAME](Boolean).foo !== 1;
+	  });
+	};
+
+	var $$13 = _export;
+	var $map$1 = arrayIteration.map;
+	var arrayMethodHasSpeciesSupport$4 = arrayMethodHasSpeciesSupport$5;
+
+	var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport$4('map');
+
+	// `Array.prototype.map` method
+	// https://tc39.es/ecma262/#sec-array.prototype.map
+	// with adding support of @@species
+	$$13({ 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);
+	  }
+	});
+
+	var $forEach$1 = arrayIteration.forEach;
+	var arrayMethodIsStrict$7 = arrayMethodIsStrict$9;
+
+	var STRICT_METHOD$7 = arrayMethodIsStrict$7('forEach');
+
+	// `Array.prototype.forEach` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.foreach
+	var arrayForEach = !STRICT_METHOD$7 ? 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 $$12 = _export;
+	var forEach$3 = arrayForEach;
+
+	// `Array.prototype.forEach` method
+	// https://tc39.es/ecma262/#sec-array.prototype.foreach
+	// eslint-disable-next-line es/no-array-prototype-foreach -- safe
+	$$12({ target: 'Array', proto: true, forced: [].forEach != forEach$3 }, {
+	  forEach: forEach$3
+	});
+
+	var global$J = global$1o;
+	var DOMIterables = domIterables;
+	var DOMTokenListPrototype = domTokenListPrototype;
+	var forEach$2 = arrayForEach;
+	var createNonEnumerableProperty$3 = createNonEnumerableProperty$b;
+
+	var handlePrototype = function (CollectionPrototype) {
+	  // 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$2;
+	  }
+	};
+
+	for (var COLLECTION_NAME in DOMIterables) {
+	  if (DOMIterables[COLLECTION_NAME]) {
+	    handlePrototype(global$J[COLLECTION_NAME] && global$J[COLLECTION_NAME].prototype);
+	  }
+	}
+
+	handlePrototype(DOMTokenListPrototype);
+
+	var $$11 = _export;
+	var isArray$5 = isArray$8;
+
+	// `Array.isArray` method
+	// https://tc39.es/ecma262/#sec-array.isarray
+	$$11({ target: 'Array', stat: true }, {
+	  isArray: isArray$5
+	});
+
+	var $$10 = _export;
+	var fails$C = fails$V;
+	var getOwnPropertyNames$3 = objectGetOwnPropertyNamesExternal.f;
+
+	// eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+	var FAILS_ON_PRIMITIVES$5 = fails$C(function () { return !Object.getOwnPropertyNames(1); });
+
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertynames
+	$$10({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$5 }, {
+	  getOwnPropertyNames: getOwnPropertyNames$3
+	});
+
+	var global$I = global$1o;
+
+	var nativePromiseConstructor = global$I.Promise;
+
+	var wellKnownSymbol$d = wellKnownSymbol$t;
+	var Iterators$1 = iterators;
+
+	var ITERATOR$7 = wellKnownSymbol$d('iterator');
+	var ArrayPrototype = Array.prototype;
+
+	// check on default Array iterator
+	var isArrayIteratorMethod$3 = function (it) {
+	  return it !== undefined && (Iterators$1.Array === it || ArrayPrototype[ITERATOR$7] === it);
+	};
+
+	var classof$6 = classof$d;
+	var getMethod$5 = getMethod$7;
+	var Iterators = iterators;
+	var wellKnownSymbol$c = wellKnownSymbol$t;
+
+	var ITERATOR$6 = wellKnownSymbol$c('iterator');
+
+	var getIteratorMethod$5 = function (it) {
+	  if (it != undefined) return getMethod$5(it, ITERATOR$6)
+	    || getMethod$5(it, '@@iterator')
+	    || Iterators[classof$6(it)];
+	};
+
+	var global$H = global$1o;
+	var call$h = functionCall;
+	var aCallable$7 = aCallable$a;
+	var anObject$d = anObject$n;
+	var tryToString$1 = tryToString$5;
+	var getIteratorMethod$4 = getIteratorMethod$5;
+
+	var TypeError$d = global$H.TypeError;
+
+	var getIterator$4 = function (argument, usingIterator) {
+	  var iteratorMethod = arguments.length < 2 ? getIteratorMethod$4(argument) : usingIterator;
+	  if (aCallable$7(iteratorMethod)) return anObject$d(call$h(iteratorMethod, argument));
+	  throw TypeError$d(tryToString$1(argument) + ' is not iterable');
+	};
+
+	var call$g = functionCall;
+	var anObject$c = anObject$n;
+	var getMethod$4 = getMethod$7;
+
+	var iteratorClose$2 = function (iterator, kind, value) {
+	  var innerResult, innerError;
+	  anObject$c(iterator);
+	  try {
+	    innerResult = getMethod$4(iterator, 'return');
+	    if (!innerResult) {
+	      if (kind === 'throw') throw value;
+	      return value;
+	    }
+	    innerResult = call$g(innerResult, iterator);
+	  } catch (error) {
+	    innerError = true;
+	    innerResult = error;
+	  }
+	  if (kind === 'throw') throw value;
+	  if (innerError) throw innerResult;
+	  anObject$c(innerResult);
+	  return value;
+	};
+
+	var global$G = global$1o;
+	var bind$d = functionBindContext;
+	var call$f = functionCall;
+	var anObject$b = anObject$n;
+	var tryToString = tryToString$5;
+	var isArrayIteratorMethod$2 = isArrayIteratorMethod$3;
+	var lengthOfArrayLike$d = lengthOfArrayLike$i;
+	var isPrototypeOf$4 = objectIsPrototypeOf;
+	var getIterator$3 = getIterator$4;
+	var getIteratorMethod$3 = getIteratorMethod$5;
+	var iteratorClose$1 = iteratorClose$2;
+
+	var TypeError$c = global$G.TypeError;
+
+	var Result = function (stopped, result) {
+	  this.stopped = stopped;
+	  this.result = result;
+	};
+
+	var ResultPrototype = Result.prototype;
+
+	var iterate$3 = function (iterable, unboundFunction, options) {
+	  var that = options && options.that;
+	  var AS_ENTRIES = !!(options && options.AS_ENTRIES);
+	  var IS_ITERATOR = !!(options && options.IS_ITERATOR);
+	  var INTERRUPTED = !!(options && options.INTERRUPTED);
+	  var fn = bind$d(unboundFunction, that);
+	  var iterator, iterFn, index, length, result, next, step;
+
+	  var stop = function (condition) {
+	    if (iterator) iteratorClose$1(iterator, 'normal', condition);
+	    return new Result(true, condition);
+	  };
+
+	  var callFn = function (value) {
+	    if (AS_ENTRIES) {
+	      anObject$b(value);
+	      return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
+	    } return INTERRUPTED ? fn(value, stop) : fn(value);
+	  };
+
+	  if (IS_ITERATOR) {
+	    iterator = iterable;
+	  } else {
+	    iterFn = getIteratorMethod$3(iterable);
+	    if (!iterFn) throw TypeError$c(tryToString(iterable) + ' is not iterable');
+	    // optimisation for array iterators
+	    if (isArrayIteratorMethod$2(iterFn)) {
+	      for (index = 0, length = lengthOfArrayLike$d(iterable); length > index; index++) {
+	        result = callFn(iterable[index]);
+	        if (result && isPrototypeOf$4(ResultPrototype, result)) return result;
+	      } return new Result(false);
+	    }
+	    iterator = getIterator$3(iterable, iterFn);
+	  }
+
+	  next = iterator.next;
+	  while (!(step = call$f(next, iterator)).done) {
+	    try {
+	      result = callFn(step.value);
+	    } catch (error) {
+	      iteratorClose$1(iterator, 'throw', error);
+	    }
+	    if (typeof result == 'object' && result && isPrototypeOf$4(ResultPrototype, result)) return result;
+	  } return new Result(false);
+	};
+
+	var wellKnownSymbol$b = wellKnownSymbol$t;
+
+	var ITERATOR$5 = wellKnownSymbol$b('iterator');
+	var SAFE_CLOSING = false;
+
+	try {
+	  var called = 0;
+	  var iteratorWithReturn = {
+	    next: function () {
+	      return { done: !!called++ };
+	    },
+	    'return': function () {
+	      SAFE_CLOSING = true;
+	    }
+	  };
+	  iteratorWithReturn[ITERATOR$5] = 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 */ }
+
+	var checkCorrectnessOfIteration$4 = function (exec, SKIP_CLOSING) {
+	  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
+	  var ITERATION_SUPPORT = false;
+	  try {
+	    var object = {};
+	    object[ITERATOR$5] = function () {
+	      return {
+	        next: function () {
+	          return { done: ITERATION_SUPPORT = true };
+	        }
+	      };
+	    };
+	    exec(object);
+	  } catch (error) { /* empty */ }
+	  return ITERATION_SUPPORT;
+	};
+
+	var global$F = global$1o;
+
+	var TypeError$b = global$F.TypeError;
+
+	var validateArgumentsLength$4 = function (passed, required) {
+	  if (passed < required) throw TypeError$b('Not enough arguments');
+	  return passed;
+	};
+
+	var userAgent$6 = engineUserAgent;
+
+	var engineIsIos = /(?:ipad|iphone|ipod).*applewebkit/i.test(userAgent$6);
+
+	var classof$5 = classofRaw$1;
+	var global$E = global$1o;
+
+	var engineIsNode = classof$5(global$E.process) == 'process';
+
+	var global$D = global$1o;
+	var apply$7 = functionApply;
+	var bind$c = functionBindContext;
+	var isCallable$8 = isCallable$r;
+	var hasOwn$8 = hasOwnProperty_1;
+	var fails$B = fails$V;
+	var html = html$2;
+	var arraySlice$8 = arraySlice$b;
+	var createElement = documentCreateElement$2;
+	var validateArgumentsLength$3 = validateArgumentsLength$4;
+	var IS_IOS$1 = engineIsIos;
+	var IS_NODE$4 = engineIsNode;
+
+	var set$2 = global$D.setImmediate;
+	var clear = global$D.clearImmediate;
+	var process$3 = global$D.process;
+	var Dispatch$1 = global$D.Dispatch;
+	var Function$3 = global$D.Function;
+	var MessageChannel = global$D.MessageChannel;
+	var String$2 = global$D.String;
+	var counter = 0;
+	var queue$1 = {};
+	var ONREADYSTATECHANGE = 'onreadystatechange';
+	var location$1, defer, channel, port;
+
+	try {
+	  // Deno throws a ReferenceError on `location` access without `--location` flag
+	  location$1 = global$D.location;
+	} catch (error) { /* empty */ }
+
+	var run = function (id) {
+	  if (hasOwn$8(queue$1, id)) {
+	    var fn = queue$1[id];
+	    delete queue$1[id];
+	    fn();
 	  }
 	};
 
@@ -2377,57 +3782,56 @@
 
 	var post = function (id) {
 	  // old engines have not location.origin
-	  global_1.postMessage(id + '', location$1.protocol + '//' + location$1.host);
+	  global$D.postMessage(String$2(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
-	      (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
+	  set$2 = function setImmediate(handler) {
+	    validateArgumentsLength$3(arguments.length, 1);
+	    var fn = isCallable$8(handler) ? handler : Function$3(handler);
+	    var args = arraySlice$8(arguments, 1);
+	    queue$1[++counter] = function () {
+	      apply$7(fn, undefined, args);
 	    };
 	    defer(counter);
 	    return counter;
 	  };
 	  clear = function clearImmediate(id) {
-	    delete queue[id];
+	    delete queue$1[id];
 	  };
 	  // Node.js 0.8-
-	  if (classofRaw(process$2) == 'process') {
+	  if (IS_NODE$4) {
 	    defer = function (id) {
-	      process$2.nextTick(runner(id));
+	      process$3.nextTick(runner(id));
 	    };
 	  // Sphere (JS game engine) Dispatch API
-	  } else if (Dispatch && Dispatch.now) {
+	  } else if (Dispatch$1 && Dispatch$1.now) {
 	    defer = function (id) {
-	      Dispatch.now(runner(id));
+	      Dispatch$1.now(runner(id));
 	    };
 	  // Browsers with MessageChannel, includes WebWorkers
 	  // except iOS - https://github.com/zloirock/core-js/issues/624
-	  } else if (MessageChannel && !engineIsIos) {
+	  } else if (MessageChannel && !IS_IOS$1) {
 	    channel = new MessageChannel();
 	    port = channel.port2;
 	    channel.port1.onmessage = listener;
-	    defer = functionBindContext(port.postMessage, port, 1);
+	    defer = bind$c(port.postMessage, port);
 	  // Browsers with postMessage, skip WebWorkers
 	  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
 	  } else if (
-	    global_1.addEventListener &&
-	    typeof postMessage == 'function' &&
-	    !global_1.importScripts &&
-	    !fails(post) &&
-	    location$1.protocol !== 'file:'
+	    global$D.addEventListener &&
+	    isCallable$8(global$D.postMessage) &&
+	    !global$D.importScripts &&
+	    location$1 && location$1.protocol !== 'file:' &&
+	    !fails$B(post)
 	  ) {
 	    defer = post;
-	    global_1.addEventListener('message', listener, false);
+	    global$D.addEventListener('message', listener, false);
 	  // IE8-
-	  } else if (ONREADYSTATECHANGE in documentCreateElement('script')) {
+	  } else if (ONREADYSTATECHANGE in createElement('script')) {
 	    defer = function (id) {
-	      html.appendChild(documentCreateElement('script'))[ONREADYSTATECHANGE] = function () {
+	      html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {
 	        html.removeChild(this);
 	        run(id);
 	      };
@@ -2440,38 +3844,51 @@
 	  }
 	}
 
-	var task = {
+	var task$1 = {
 	  set: set$2,
 	  clear: clear
 	};
 
-	var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+	var userAgent$5 = engineUserAgent;
+	var global$C = global$1o;
 
-	var macrotask = task.set;
+	var engineIsIosPebble = /ipad|iphone|ipod/i.test(userAgent$5) && global$C.Pebble !== undefined;
 
+	var userAgent$4 = engineUserAgent;
 
-	var MutationObserver = global_1.MutationObserver || global_1.WebKitMutationObserver;
-	var process$3 = global_1.process;
-	var Promise$1 = global_1.Promise;
-	var IS_NODE = classofRaw(process$3) == 'process';
+	var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(userAgent$4);
+
+	var global$B = global$1o;
+	var bind$b = functionBindContext;
+	var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+	var macrotask = task$1.set;
+	var IS_IOS = engineIsIos;
+	var IS_IOS_PEBBLE = engineIsIosPebble;
+	var IS_WEBOS_WEBKIT = engineIsWebosWebkit;
+	var IS_NODE$3 = engineIsNode;
+
+	var MutationObserver = global$B.MutationObserver || global$B.WebKitMutationObserver;
+	var document$2 = global$B.document;
+	var process$2 = global$B.process;
+	var Promise$1 = global$B.Promise;
 	// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
-	var queueMicrotaskDescriptor = getOwnPropertyDescriptor$2(global_1, 'queueMicrotask');
+	var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$B, 'queueMicrotask');
 	var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;
 
-	var flush, head, last, notify, toggle, node, promise, then;
+	var flush, head, last, notify$1, toggle, node, promise, then;
 
 	// modern engines have queueMicrotask method
 	if (!queueMicrotask) {
 	  flush = function () {
 	    var parent, fn;
-	    if (IS_NODE && (parent = process$3.domain)) parent.exit();
+	    if (IS_NODE$3 && (parent = process$2.domain)) parent.exit();
 	    while (head) {
 	      fn = head.fn;
 	      head = head.next;
 	      try {
 	        fn();
 	      } catch (error) {
-	        if (head) notify();
+	        if (head) notify$1();
 	        else last = undefined;
 	        throw error;
 	      }
@@ -2479,26 +3896,29 @@
 	    if (parent) parent.enter();
 	  };
 
-	  // Node.js
-	  if (IS_NODE) {
-	    notify = function () {
-	      process$3.nextTick(flush);
-	    };
 	  // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
-	  } else if (MutationObserver && !engineIsIos) {
+	  // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
+	  if (!IS_IOS && !IS_NODE$3 && !IS_WEBOS_WEBKIT && MutationObserver && document$2) {
 	    toggle = true;
-	    node = document.createTextNode('');
+	    node = document$2.createTextNode('');
 	    new MutationObserver(flush).observe(node, { characterData: true });
-	    notify = function () {
+	    notify$1 = function () {
 	      node.data = toggle = !toggle;
 	    };
 	  // environments with maybe non-completely correct, but existent Promise
-	  } else if (Promise$1 && Promise$1.resolve) {
+	  } else if (!IS_IOS_PEBBLE && Promise$1 && Promise$1.resolve) {
 	    // Promise.resolve without an argument throws an error in LG WebOS 2
 	    promise = Promise$1.resolve(undefined);
-	    then = promise.then;
-	    notify = function () {
-	      then.call(promise, flush);
+	    // workaround of WebKit ~ iOS Safari 10.1 bug
+	    promise.constructor = Promise$1;
+	    then = bind$b(promise.then, promise);
+	    notify$1 = function () {
+	      then(flush);
+	    };
+	  // Node.js without promises
+	  } else if (IS_NODE$3) {
+	    notify$1 = function () {
+	      process$2.nextTick(flush);
 	    };
 	  // for other environments - macrotask based on:
 	  // - setImmediate
@@ -2507,22 +3927,27 @@
 	  // - onreadystatechange
 	  // - setTimeout
 	  } else {
-	    notify = function () {
-	      // strange IE + webpack dev server bug - use .call(global)
-	      macrotask.call(global_1, flush);
+	    // strange IE + webpack dev server bug - use .bind(global)
+	    macrotask = bind$b(macrotask, global$B);
+	    notify$1 = function () {
+	      macrotask(flush);
 	    };
 	  }
 	}
 
-	var microtask = queueMicrotask || function (fn) {
+	var microtask$1 = queueMicrotask || function (fn) {
 	  var task = { fn: fn, next: undefined };
 	  if (last) last.next = task;
 	  if (!head) {
 	    head = task;
-	    notify();
+	    notify$1();
 	  } last = task;
 	};
 
+	var newPromiseCapability$2 = {};
+
+	var aCallable$6 = aCallable$a;
+
 	var PromiseCapability = function (C) {
 	  var resolve, reject;
 	  this.promise = new C(function ($$resolve, $$reject) {
@@ -2530,36 +3955,39 @@
 	    resolve = $$resolve;
 	    reject = $$reject;
 	  });
-	  this.resolve = aFunction$1(resolve);
-	  this.reject = aFunction$1(reject);
+	  this.resolve = aCallable$6(resolve);
+	  this.reject = aCallable$6(reject);
 	};
 
-	// 25.4.1.5 NewPromiseCapability(C)
-	var f$7 = function (C) {
+	// `NewPromiseCapability` abstract operation
+	// https://tc39.es/ecma262/#sec-newpromisecapability
+	newPromiseCapability$2.f = function (C) {
 	  return new PromiseCapability(C);
 	};
 
-	var newPromiseCapability = {
-		f: f$7
-	};
+	var anObject$a = anObject$n;
+	var isObject$j = isObject$s;
+	var newPromiseCapability$1 = newPromiseCapability$2;
 
-	var promiseResolve = function (C, x) {
-	  anObject(C);
-	  if (isObject(x) && x.constructor === C) return x;
-	  var promiseCapability = newPromiseCapability.f(C);
+	var promiseResolve$2 = function (C, x) {
+	  anObject$a(C);
+	  if (isObject$j(x) && x.constructor === C) return x;
+	  var promiseCapability = newPromiseCapability$1.f(C);
 	  var resolve = promiseCapability.resolve;
 	  resolve(x);
 	  return promiseCapability.promise;
 	};
 
-	var hostReportErrors = function (a, b) {
-	  var console = global_1.console;
+	var global$A = global$1o;
+
+	var hostReportErrors$1 = function (a, b) {
+	  var console = global$A.console;
 	  if (console && console.error) {
-	    arguments.length === 1 ? console.error(a) : console.error(a, b);
+	    arguments.length == 1 ? console.error(a) : console.error(a, b);
 	  }
 	};
 
-	var perform = function (exec) {
+	var perform$1 = function (exec) {
 	  try {
 	    return { error: false, value: exec() };
 	  } catch (error) {
@@ -2567,31 +3995,81 @@
 	  }
 	};
 
-	var task$1 = task.set;
-
-
-
-
-
-
-
-
+	var Queue$1 = function () {
+	  this.head = null;
+	  this.tail = null;
+	};
 
+	Queue$1.prototype = {
+	  add: function (item) {
+	    var entry = { item: item, next: null };
+	    if (this.head) this.tail.next = entry;
+	    else this.head = entry;
+	    this.tail = entry;
+	  },
+	  get: function () {
+	    var entry = this.head;
+	    if (entry) {
+	      this.head = entry.next;
+	      if (this.tail === entry) this.tail = null;
+	      return entry.item;
+	    }
+	  }
+	};
 
-	var SPECIES$5 = wellKnownSymbol('species');
+	var queue = Queue$1;
+
+	var engineIsBrowser = typeof window == 'object';
+
+	var $$$ = _export;
+	var global$z = global$1o;
+	var getBuiltIn$3 = getBuiltIn$b;
+	var call$e = functionCall;
+	var NativePromise$1 = nativePromiseConstructor;
+	var redefine$8 = redefine$h.exports;
+	var redefineAll$2 = redefineAll$4;
+	var setPrototypeOf$3 = objectSetPrototypeOf;
+	var setToStringTag$5 = setToStringTag$a;
+	var setSpecies$3 = setSpecies$5;
+	var aCallable$5 = aCallable$a;
+	var isCallable$7 = isCallable$r;
+	var isObject$i = isObject$s;
+	var anInstance$5 = anInstance$7;
+	var inspectSource = inspectSource$4;
+	var iterate$2 = iterate$3;
+	var checkCorrectnessOfIteration$3 = checkCorrectnessOfIteration$4;
+	var speciesConstructor$3 = speciesConstructor$5;
+	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 Queue = queue;
+	var InternalStateModule$4 = internalState;
+	var isForced$3 = isForced_1;
+	var wellKnownSymbol$a = wellKnownSymbol$t;
+	var IS_BROWSER = engineIsBrowser;
+	var IS_NODE$2 = engineIsNode;
+	var V8_VERSION$1 = engineV8Version;
+
+	var SPECIES$2 = wellKnownSymbol$a('species');
 	var PROMISE = 'Promise';
-	var getInternalState$3 = internalState.get;
-	var setInternalState$3 = internalState.set;
-	var getInternalPromiseState = internalState.getterFor(PROMISE);
-	var PromiseConstructor = nativePromiseConstructor;
-	var TypeError$1 = global_1.TypeError;
-	var document$2 = global_1.document;
-	var process$4 = global_1.process;
-	var $fetch = getBuiltIn('fetch');
-	var newPromiseCapability$1 = newPromiseCapability.f;
-	var newGenericPromiseCapability = newPromiseCapability$1;
-	var IS_NODE$1 = classofRaw(process$4) == 'process';
-	var DISPATCH_EVENT = !!(document$2 && document$2.createEvent && global_1.dispatchEvent);
+
+	var getInternalState$1 = InternalStateModule$4.getterFor(PROMISE);
+	var setInternalState$4 = InternalStateModule$4.set;
+	var getInternalPromiseState = InternalStateModule$4.getterFor(PROMISE);
+	var NativePromisePrototype = NativePromise$1 && NativePromise$1.prototype;
+	var PromiseConstructor = NativePromise$1;
+	var PromisePrototype = NativePromisePrototype;
+	var TypeError$a = global$z.TypeError;
+	var document$1 = global$z.document;
+	var process$1 = global$z.process;
+	var newPromiseCapability = newPromiseCapabilityModule.f;
+	var newGenericPromiseCapability = newPromiseCapability;
+
+	var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$z.dispatchEvent);
+	var NATIVE_REJECTION_EVENT = isCallable$7(global$z.PromiseRejectionEvent);
 	var UNHANDLED_REJECTION = 'unhandledrejection';
 	var REJECTION_HANDLED = 'rejectionhandled';
 	var PENDING = 0;
@@ -2599,116 +4077,120 @@
 	var REJECTED = 2;
 	var HANDLED = 1;
 	var UNHANDLED = 2;
+	var SUBCLASSING = false;
+
 	var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
 
-	var FORCED = isForced_1(PROMISE, function () {
-	  var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);
-	  if (!GLOBAL_CORE_JS_PROMISE) {
-	    // 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 (engineV8Version === 66) return true;
-	    // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
-	    if (!IS_NODE$1 && typeof PromiseRejectionEvent != 'function') return true;
-	  }
+	var FORCED$g = isForced$3(PROMISE, function () {
+	  var PROMISE_CONSTRUCTOR_SOURCE = inspectSource(PromiseConstructor);
+	  var GLOBAL_CORE_JS_PROMISE = PROMISE_CONSTRUCTOR_SOURCE !== 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 (engineV8Version >= 51 && /native code/.test(PromiseConstructor)) return false;
+	  if (V8_VERSION$1 >= 51 && /native code/.test(PROMISE_CONSTRUCTOR_SOURCE)) return false;
 	  // Detect correctness of subclassing with @@species support
-	  var promise = PromiseConstructor.resolve(1);
+	  var promise = new PromiseConstructor(function (resolve) { resolve(1); });
 	  var FakePromise = function (exec) {
 	    exec(function () { /* empty */ }, function () { /* empty */ });
 	  };
 	  var constructor = promise.constructor = {};
-	  constructor[SPECIES$5] = FakePromise;
-	  return !(promise.then(function () { /* empty */ }) instanceof FakePromise);
+	  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 = FORCED || !checkCorrectnessOfIteration(function (iterable) {
+	var INCORRECT_ITERATION$1 = FORCED$g || !checkCorrectnessOfIteration$3(function (iterable) {
 	  PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
 	});
 
 	// helpers
 	var isThenable = function (it) {
 	  var then;
-	  return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
+	  return isObject$i(it) && isCallable$7(then = it.then) ? then : false;
+	};
+
+	var callReaction = function (reaction, state) {
+	  var value = state.value;
+	  var ok = state.state == FULFILLED;
+	  var handler = ok ? reaction.ok : reaction.fail;
+	  var resolve = reaction.resolve;
+	  var reject = reaction.reject;
+	  var domain = reaction.domain;
+	  var result, then, exited;
+	  try {
+	    if (handler) {
+	      if (!ok) {
+	        if (state.rejection === UNHANDLED) onHandleUnhandled(state);
+	        state.rejection = HANDLED;
+	      }
+	      if (handler === true) result = value;
+	      else {
+	        if (domain) domain.enter();
+	        result = handler(value); // can throw
+	        if (domain) {
+	          domain.exit();
+	          exited = true;
+	        }
+	      }
+	      if (result === reaction.promise) {
+	        reject(TypeError$a('Promise-chain cycle'));
+	      } else if (then = isThenable(result)) {
+	        call$e(then, result, resolve, reject);
+	      } else resolve(result);
+	    } else reject(value);
+	  } catch (error) {
+	    if (domain && !exited) domain.exit();
+	    reject(error);
+	  }
 	};
 
-	var notify$1 = function (promise, state, isReject) {
+	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(promise, 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);
-	      }
+	    var reactions = state.reactions;
+	    var reaction;
+	    while (reaction = reactions.get()) {
+	      callReaction(reaction, state);
 	    }
-	    state.reactions = [];
 	    state.notified = false;
-	    if (isReject && !state.rejection) onUnhandled(promise, state);
+	    if (isReject && !state.rejection) onUnhandled(state);
 	  });
 	};
 
-	var dispatchEvent = function (name, promise, reason) {
+	var dispatchEvent$1 = function (name, promise, reason) {
 	  var event, handler;
 	  if (DISPATCH_EVENT) {
-	    event = document$2.createEvent('Event');
+	    event = document$1.createEvent('Event');
 	    event.promise = promise;
 	    event.reason = reason;
 	    event.initEvent(name, false, true);
-	    global_1.dispatchEvent(event);
+	    global$z.dispatchEvent(event);
 	  } else event = { promise: promise, reason: reason };
-	  if (handler = global_1['on' + name]) handler(event);
+	  if (!NATIVE_REJECTION_EVENT && (handler = global$z['on' + name])) handler(event);
 	  else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
 	};
 
-	var onUnhandled = function (promise, state) {
-	  task$1.call(global_1, function () {
+	var onUnhandled = function (state) {
+	  call$e(task, global$z, 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$4.emit('unhandledRejection', value, promise);
-	        } else dispatchEvent(UNHANDLED_REJECTION, promise, value);
+	        if (IS_NODE$2) {
+	          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;
+	      state.rejection = IS_NODE$2 || isUnhandled(state) ? UNHANDLED : HANDLED;
 	      if (result.error) throw result.value;
 	    }
 	  });
@@ -2718,187 +4200,198 @@
 	  return state.rejection !== HANDLED && !state.parent;
 	};
 
-	var onHandleUnhandled = function (promise, state) {
-	  task$1.call(global_1, function () {
-	    if (IS_NODE$1) {
-	      process$4.emit('rejectionHandled', promise);
-	    } else dispatchEvent(REJECTION_HANDLED, promise, state.value);
+	var onHandleUnhandled = function (state) {
+	  call$e(task, global$z, function () {
+	    var promise = state.facade;
+	    if (IS_NODE$2) {
+	      process$1.emit('rejectionHandled', promise);
+	    } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
 	  });
 	};
 
-	var bind = function (fn, promise, state, unwrap) {
+	var bind$a = function (fn, state, unwrap) {
 	  return function (value) {
-	    fn(promise, state, value, unwrap);
+	    fn(state, value, unwrap);
 	  };
 	};
 
-	var internalReject = function (promise, 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$1(promise, state, true);
+	  notify(state, true);
 	};
 
-	var internalResolve = function (promise, state, value, unwrap) {
+	var internalResolve = function (state, value, unwrap) {
 	  if (state.done) return;
 	  state.done = true;
 	  if (unwrap) state = unwrap;
 	  try {
-	    if (promise === value) throw TypeError$1("Promise can't be resolved itself");
+	    if (state.facade === value) throw TypeError$a("Promise can't be resolved itself");
 	    var then = isThenable(value);
 	    if (then) {
 	      microtask(function () {
 	        var wrapper = { done: false };
 	        try {
-	          then.call(value,
-	            bind(internalResolve, promise, wrapper, state),
-	            bind(internalReject, promise, wrapper, state)
+	          call$e(then, value,
+	            bind$a(internalResolve, wrapper, state),
+	            bind$a(internalReject, wrapper, state)
 	          );
 	        } catch (error) {
-	          internalReject(promise, wrapper, error, state);
+	          internalReject(wrapper, error, state);
 	        }
 	      });
 	    } else {
 	      state.value = value;
 	      state.state = FULFILLED;
-	      notify$1(promise, state, false);
+	      notify(state, false);
 	    }
 	  } catch (error) {
-	    internalReject(promise, { done: false }, error, state);
+	    internalReject({ done: false }, error, state);
 	  }
 	};
 
 	// constructor polyfill
-	if (FORCED) {
+	if (FORCED$g) {
 	  // 25.4.3.1 Promise(executor)
 	  PromiseConstructor = function Promise(executor) {
-	    anInstance(this, PromiseConstructor, PROMISE);
-	    aFunction$1(executor);
-	    Internal.call(this);
-	    var state = getInternalState$3(this);
+	    anInstance$5(this, PromisePrototype);
+	    aCallable$5(executor);
+	    call$e(Internal, this);
+	    var state = getInternalState$1(this);
 	    try {
-	      executor(bind(internalResolve, this, state), bind(internalReject, this, state));
+	      executor(bind$a(internalResolve, state), bind$a(internalReject, state));
 	    } catch (error) {
-	      internalReject(this, state, error);
+	      internalReject(state, error);
 	    }
 	  };
-	  // eslint-disable-next-line no-unused-vars
+	  PromisePrototype = PromiseConstructor.prototype;
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
 	  Internal = function Promise(executor) {
-	    setInternalState$3(this, {
+	    setInternalState$4(this, {
 	      type: PROMISE,
 	      done: false,
 	      notified: false,
 	      parent: false,
-	      reactions: [],
+	      reactions: new Queue(),
 	      rejection: false,
 	      state: PENDING,
 	      value: undefined
 	    });
 	  };
-	  Internal.prototype = redefineAll(PromiseConstructor.prototype, {
+	  Internal.prototype = redefineAll$2(PromisePrototype, {
 	    // `Promise.prototype.then` method
-	    // https://tc39.github.io/ecma262/#sec-promise.prototype.then
+	    // https://tc39.es/ecma262/#sec-promise.prototype.then
+	    // eslint-disable-next-line unicorn/no-thenable -- safe
 	    then: function then(onFulfilled, onRejected) {
 	      var state = getInternalPromiseState(this);
-	      var reaction = newPromiseCapability$1(speciesConstructor(this, PromiseConstructor));
-	      reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
-	      reaction.fail = typeof onRejected == 'function' && onRejected;
-	      reaction.domain = IS_NODE$1 ? process$4.domain : undefined;
+	      var reaction = newPromiseCapability(speciesConstructor$3(this, PromiseConstructor));
 	      state.parent = true;
-	      state.reactions.push(reaction);
-	      if (state.state != PENDING) notify$1(this, state, false);
+	      reaction.ok = isCallable$7(onFulfilled) ? onFulfilled : true;
+	      reaction.fail = isCallable$7(onRejected) && onRejected;
+	      reaction.domain = IS_NODE$2 ? process$1.domain : undefined;
+	      if (state.state == PENDING) state.reactions.add(reaction);
+	      else microtask(function () {
+	        callReaction(reaction, state);
+	      });
 	      return reaction.promise;
 	    },
 	    // `Promise.prototype.catch` method
-	    // https://tc39.github.io/ecma262/#sec-promise.prototype.catch
+	    // 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$3(promise);
+	    var state = getInternalState$1(promise);
 	    this.promise = promise;
-	    this.resolve = bind(internalResolve, promise, state);
-	    this.reject = bind(internalReject, promise, state);
+	    this.resolve = bind$a(internalResolve, state);
+	    this.reject = bind$a(internalReject, state);
 	  };
-	  newPromiseCapability.f = newPromiseCapability$1 = function (C) {
+	  newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
 	    return C === PromiseConstructor || C === PromiseWrapper
 	      ? new OwnPromiseCapability(C)
 	      : newGenericPromiseCapability(C);
 	  };
 
-	  if ( typeof nativePromiseConstructor == 'function') {
-	    nativeThen = nativePromiseConstructor.prototype.then;
+	  if (isCallable$7(NativePromise$1) && NativePromisePrototype !== Object.prototype) {
+	    nativeThen = NativePromisePrototype.then;
 
-	    // wrap native Promise#then for native async functions
-	    redefine(nativePromiseConstructor.prototype, '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 });
-
-	    // wrap fetch result
-	    if (typeof $fetch == 'function') _export({ global: true, enumerable: true, forced: true }, {
-	      // eslint-disable-next-line no-unused-vars
-	      fetch: function fetch(input /* , init */) {
-	        return promiseResolve(PromiseConstructor, $fetch.apply(global_1, arguments));
-	      }
-	    });
+	    if (!SUBCLASSING) {
+	      // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
+	      redefine$8(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
+	        var that = this;
+	        return new PromiseConstructor(function (resolve, reject) {
+	          call$e(nativeThen, that, resolve, reject);
+	        }).then(onFulfilled, onRejected);
+	      // https://github.com/zloirock/core-js/issues/640
+	      }, { unsafe: true });
+
+	      // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
+	      redefine$8(NativePromisePrototype, 'catch', PromisePrototype['catch'], { unsafe: true });
+	    }
+
+	    // make `.constructor === Promise` work for native promise-based APIs
+	    try {
+	      delete NativePromisePrototype.constructor;
+	    } catch (error) { /* empty */ }
+
+	    // make `instanceof Promise` work for native promise-based APIs
+	    if (setPrototypeOf$3) {
+	      setPrototypeOf$3(NativePromisePrototype, PromisePrototype);
+	    }
 	  }
 	}
 
-	_export({ global: true, wrap: true, forced: FORCED }, {
+	$$$({ global: true, wrap: true, forced: FORCED$g }, {
 	  Promise: PromiseConstructor
 	});
 
-	setToStringTag(PromiseConstructor, PROMISE, false);
-	setSpecies(PROMISE);
+	setToStringTag$5(PromiseConstructor, PROMISE, false);
+	setSpecies$3(PROMISE);
 
-	PromiseWrapper = getBuiltIn(PROMISE);
+	PromiseWrapper = getBuiltIn$3(PROMISE);
 
 	// statics
-	_export({ target: PROMISE, stat: true, forced: FORCED }, {
+	$$$({ target: PROMISE, stat: true, forced: FORCED$g }, {
 	  // `Promise.reject` method
-	  // https://tc39.github.io/ecma262/#sec-promise.reject
+	  // https://tc39.es/ecma262/#sec-promise.reject
 	  reject: function reject(r) {
-	    var capability = newPromiseCapability$1(this);
-	    capability.reject.call(undefined, r);
+	    var capability = newPromiseCapability(this);
+	    call$e(capability.reject, undefined, r);
 	    return capability.promise;
 	  }
 	});
 
-	_export({ target: PROMISE, stat: true, forced:  FORCED }, {
+	$$$({ target: PROMISE, stat: true, forced: FORCED$g }, {
 	  // `Promise.resolve` method
-	  // https://tc39.github.io/ecma262/#sec-promise.resolve
+	  // https://tc39.es/ecma262/#sec-promise.resolve
 	  resolve: function resolve(x) {
-	    return promiseResolve( this, x);
+	    return promiseResolve$1(this, x);
 	  }
 	});
 
-	_export({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {
+	$$$({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION$1 }, {
 	  // `Promise.all` method
-	  // https://tc39.github.io/ecma262/#sec-promise.all
+	  // https://tc39.es/ecma262/#sec-promise.all
 	  all: function all(iterable) {
 	    var C = this;
-	    var capability = newPromiseCapability$1(C);
+	    var capability = newPromiseCapability(C);
 	    var resolve = capability.resolve;
 	    var reject = capability.reject;
 	    var result = perform(function () {
-	      var $promiseResolve = aFunction$1(C.resolve);
+	      var $promiseResolve = aCallable$5(C.resolve);
 	      var values = [];
 	      var counter = 0;
 	      var remaining = 1;
-	      iterate_1(iterable, function (promise) {
+	      iterate$2(iterable, function (promise) {
 	        var index = counter++;
 	        var alreadyCalled = false;
-	        values.push(undefined);
 	        remaining++;
-	        $promiseResolve.call(C, promise).then(function (value) {
+	        call$e($promiseResolve, C, promise).then(function (value) {
 	          if (alreadyCalled) return;
 	          alreadyCalled = true;
 	          values[index] = value;
@@ -2911,15 +4404,15 @@
 	    return capability.promise;
 	  },
 	  // `Promise.race` method
-	  // https://tc39.github.io/ecma262/#sec-promise.race
+	  // https://tc39.es/ecma262/#sec-promise.race
 	  race: function race(iterable) {
 	    var C = this;
-	    var capability = newPromiseCapability$1(C);
+	    var capability = newPromiseCapability(C);
 	    var reject = capability.reject;
 	    var result = perform(function () {
-	      var $promiseResolve = aFunction$1(C.resolve);
-	      iterate_1(iterable, function (promise) {
-	        $promiseResolve.call(C, promise).then(capability.resolve, reject);
+	      var $promiseResolve = aCallable$5(C.resolve);
+	      iterate$2(iterable, function (promise) {
+	        call$e($promiseResolve, C, promise).then(capability.resolve, reject);
 	      });
 	    });
 	    if (result.error) reject(result.value);
@@ -2927,7297 +4420,7665 @@
 	  }
 	});
 
-	// `RegExp.prototype.flags` getter implementation
-	// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
-	var regexpFlags = function () {
-	  var that = anObject(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;
-	};
+	var typedArrayConstructor = {exports: {}};
 
-	// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
-	// so we use an intermediate function.
-	function RE(s, f) {
-	  return RegExp(s, f);
-	}
+	/* eslint-disable no-new -- required for testing */
 
-	var UNSUPPORTED_Y = fails(function () {
-	  // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
-	  var re = RE('a', 'y');
-	  re.lastIndex = 2;
-	  return re.exec('abcd') != null;
-	});
+	var global$y = global$1o;
+	var fails$A = fails$V;
+	var checkCorrectnessOfIteration$2 = checkCorrectnessOfIteration$4;
+	var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
 
-	var BROKEN_CARET = fails(function () {
-	  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
-	  var re = RE('^r', 'gy');
-	  re.lastIndex = 2;
-	  return re.exec('str') != null;
+	var ArrayBuffer$2 = global$y.ArrayBuffer;
+	var Int8Array$3 = global$y.Int8Array;
+
+	var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$1 || !fails$A(function () {
+	  Int8Array$3(1);
+	}) || !fails$A(function () {
+	  new Int8Array$3(-1);
+	}) || !checkCorrectnessOfIteration$2(function (iterable) {
+	  new Int8Array$3();
+	  new Int8Array$3(null);
+	  new Int8Array$3(1.5);
+	  new Int8Array$3(iterable);
+	}, true) || fails$A(function () {
+	  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+	  return new Int8Array$3(new ArrayBuffer$2(2), 1, undefined).length !== 1;
 	});
 
-	var regexpStickyHelpers = {
-		UNSUPPORTED_Y: UNSUPPORTED_Y,
-		BROKEN_CARET: BROKEN_CARET
-	};
-
-	var nativeExec = RegExp.prototype.exec;
-	// This always refers to the native implementation, because the
-	// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,
-	// which loads this file before patching the method.
-	var nativeReplace = String.prototype.replace;
+	var isObject$h = isObject$s;
 
-	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 floor$6 = Math.floor;
 
-	var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;
+	// `IsIntegralNumber` abstract operation
+	// https://tc39.es/ecma262/#sec-isintegralnumber
+	// eslint-disable-next-line es/no-number-isinteger -- safe
+	var isIntegralNumber$1 = Number.isInteger || function isInteger(it) {
+	  return !isObject$h(it) && isFinite(it) && floor$6(it) === it;
+	};
 
-	// nonparticipating capturing group, copied from es5-shim's String#split patch.
-	var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
+	var global$x = global$1o;
+	var toIntegerOrInfinity$5 = toIntegerOrInfinity$b;
 
-	var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$1;
+	var RangeError$9 = global$x.RangeError;
 
-	if (PATCH) {
-	  patchedExec = function exec(str) {
-	    var re = this;
-	    var lastIndex, reCopy, match, i;
-	    var sticky = UNSUPPORTED_Y$1 && re.sticky;
-	    var flags = regexpFlags.call(re);
-	    var source = re.source;
-	    var charsAdded = 0;
-	    var strCopy = str;
+	var toPositiveInteger$1 = function (it) {
+	  var result = toIntegerOrInfinity$5(it);
+	  if (result < 0) throw RangeError$9("The argument can't be less than 0");
+	  return result;
+	};
 
-	    if (sticky) {
-	      flags = flags.replace('y', '');
-	      if (flags.indexOf('g') === -1) {
-	        flags += 'g';
-	      }
+	var global$w = global$1o;
+	var toPositiveInteger = toPositiveInteger$1;
 
-	      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 RangeError$8 = global$w.RangeError;
 
-	    if (NPCG_INCLUDED) {
-	      reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
-	    }
-	    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
+	var toOffset$2 = function (it, BYTES) {
+	  var offset = toPositiveInteger(it);
+	  if (offset % BYTES) throw RangeError$8('Wrong offset');
+	  return offset;
+	};
 
-	    match = nativeExec.call(sticky ? reCopy : re, strCopy);
+	var bind$9 = functionBindContext;
+	var call$d = functionCall;
+	var aConstructor$1 = aConstructor$3;
+	var toObject$c = toObject$i;
+	var lengthOfArrayLike$c = lengthOfArrayLike$i;
+	var getIterator$2 = getIterator$4;
+	var getIteratorMethod$2 = getIteratorMethod$5;
+	var isArrayIteratorMethod$1 = isArrayIteratorMethod$3;
+	var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
 
-	    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;
-	        }
-	      });
+	var typedArrayFrom$2 = function from(source /* , mapfn, thisArg */) {
+	  var C = aConstructor$1(this);
+	  var O = toObject$c(source);
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  var iteratorMethod = getIteratorMethod$2(O);
+	  var i, length, result, step, iterator, next;
+	  if (iteratorMethod && !isArrayIteratorMethod$1(iteratorMethod)) {
+	    iterator = getIterator$2(O, iteratorMethod);
+	    next = iterator.next;
+	    O = [];
+	    while (!(step = call$d(next, iterator)).done) {
+	      O.push(step.value);
 	    }
+	  }
+	  if (mapping && argumentsLength > 2) {
+	    mapfn = bind$9(mapfn, arguments[2]);
+	  }
+	  length = lengthOfArrayLike$c(O);
+	  result = new (aTypedArrayConstructor$2(C))(length);
+	  for (i = 0; length > i; i++) {
+	    result[i] = mapping ? mapfn(O[i], i) : O[i];
+	  }
+	  return result;
+	};
 
-	    return match;
-	  };
-	}
+	var isCallable$6 = isCallable$r;
+	var isObject$g = isObject$s;
+	var setPrototypeOf$2 = objectSetPrototypeOf;
 
-	var regexpExec = patchedExec;
+	// 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
+	    isCallable$6(NewTarget = dummy.constructor) &&
+	    NewTarget !== Wrapper &&
+	    isObject$g(NewTargetPrototype = NewTarget.prototype) &&
+	    NewTargetPrototype !== Wrapper.prototype
+	  ) setPrototypeOf$2($this, NewTargetPrototype);
+	  return $this;
+	};
 
-	_export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
-	  exec: regexpExec
-	});
+	var $$_ = _export;
+	var global$v = global$1o;
+	var call$c = functionCall;
+	var DESCRIPTORS$c = descriptors;
+	var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1 = typedArrayConstructorsRequireWrappers;
+	var ArrayBufferViewCore$n = arrayBufferViewCore;
+	var ArrayBufferModule = arrayBuffer;
+	var anInstance$4 = anInstance$7;
+	var createPropertyDescriptor$1 = createPropertyDescriptor$7;
+	var createNonEnumerableProperty$2 = createNonEnumerableProperty$b;
+	var isIntegralNumber = isIntegralNumber$1;
+	var toLength$7 = toLength$c;
+	var toIndex = toIndex$2;
+	var toOffset$1 = toOffset$2;
+	var toPropertyKey = toPropertyKey$5;
+	var hasOwn$7 = hasOwnProperty_1;
+	var classof$4 = classof$d;
+	var isObject$f = isObject$s;
+	var isSymbol$2 = isSymbol$6;
+	var create$7 = objectCreate;
+	var isPrototypeOf$3 = objectIsPrototypeOf;
+	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 = objectDefineProperty;
+	var getOwnPropertyDescriptorModule$1 = objectGetOwnPropertyDescriptor;
+	var InternalStateModule$3 = internalState;
+	var inheritIfRequired$3 = inheritIfRequired$4;
+
+	var getInternalState = InternalStateModule$3.get;
+	var setInternalState$3 = InternalStateModule$3.set;
+	var nativeDefineProperty = definePropertyModule.f;
+	var nativeGetOwnPropertyDescriptor$1 = getOwnPropertyDescriptorModule$1.f;
+	var round = Math.round;
+	var RangeError$7 = global$v.RangeError;
+	var ArrayBuffer$1 = ArrayBufferModule.ArrayBuffer;
+	var ArrayBufferPrototype = ArrayBuffer$1.prototype;
+	var DataView$1 = ArrayBufferModule.DataView;
+	var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore$n.NATIVE_ARRAY_BUFFER_VIEWS;
+	var TYPED_ARRAY_CONSTRUCTOR$1 = ArrayBufferViewCore$n.TYPED_ARRAY_CONSTRUCTOR;
+	var TYPED_ARRAY_TAG = ArrayBufferViewCore$n.TYPED_ARRAY_TAG;
+	var TypedArray = ArrayBufferViewCore$n.TypedArray;
+	var TypedArrayPrototype$1 = ArrayBufferViewCore$n.TypedArrayPrototype;
+	var aTypedArrayConstructor$1 = ArrayBufferViewCore$n.aTypedArrayConstructor;
+	var isTypedArray = ArrayBufferViewCore$n.isTypedArray;
+	var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
+	var WRONG_LENGTH = 'Wrong length';
 
-	var TO_STRING$1 = 'toString';
-	var RegExpPrototype = RegExp.prototype;
-	var nativeToString = RegExpPrototype[TO_STRING$1];
+	var fromList = function (C, list) {
+	  aTypedArrayConstructor$1(C);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new C(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	};
 
-	var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
-	// FF44- RegExp#toString has a wrong name
-	var INCORRECT_NAME = nativeToString.name != TO_STRING$1;
+	var addGetter = function (it, key) {
+	  nativeDefineProperty(it, key, { get: function () {
+	    return getInternalState(this)[key];
+	  } });
+	};
 
-	// `RegExp.prototype.toString` method
-	// https://tc39.github.io/ecma262/#sec-regexp.prototype.tostring
-	if (NOT_GENERIC || INCORRECT_NAME) {
-	  redefine(RegExp.prototype, TO_STRING$1, function toString() {
-	    var R = anObject(this);
-	    var p = String(R.source);
-	    var rf = R.flags;
-	    var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? regexpFlags.call(R) : rf);
-	    return '/' + p + '/' + f;
-	  }, { unsafe: true });
-	}
+	var isArrayBuffer = function (it) {
+	  var klass;
+	  return isPrototypeOf$3(ArrayBufferPrototype, it) || (klass = classof$4(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
+	};
 
-	// `String.prototype.{ codePointAt, at }` methods implementation
-	var createMethod$2 = function (CONVERT_TO_STRING) {
-	  return function ($this, pos) {
-	    var S = String(requireObjectCoercible($this));
-	    var position = toInteger(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 isTypedArrayIndex = function (target, key) {
+	  return isTypedArray(target)
+	    && !isSymbol$2(key)
+	    && key in target
+	    && isIntegralNumber(+key)
+	    && key >= 0;
 	};
 
-	var stringMultibyte = {
-	  // `String.prototype.codePointAt` method
-	  // https://tc39.github.io/ecma262/#sec-string.prototype.codepointat
-	  codeAt: createMethod$2(false),
-	  // `String.prototype.at` method
-	  // https://github.com/mathiasbynens/String.prototype.at
-	  charAt: createMethod$2(true)
+	var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+	  key = toPropertyKey(key);
+	  return isTypedArrayIndex(target, key)
+	    ? createPropertyDescriptor$1(2, target[key])
+	    : nativeGetOwnPropertyDescriptor$1(target, key);
 	};
 
-	var charAt = stringMultibyte.charAt;
+	var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+	  key = toPropertyKey(key);
+	  if (isTypedArrayIndex(target, key)
+	    && isObject$f(descriptor)
+	    && hasOwn$7(descriptor, 'value')
+	    && !hasOwn$7(descriptor, 'get')
+	    && !hasOwn$7(descriptor, 'set')
+	    // TODO: add validation descriptor w/o calling accessors
+	    && !descriptor.configurable
+	    && (!hasOwn$7(descriptor, 'writable') || descriptor.writable)
+	    && (!hasOwn$7(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.f = wrappedDefineProperty;
+	    addGetter(TypedArrayPrototype$1, 'buffer');
+	    addGetter(TypedArrayPrototype$1, 'byteOffset');
+	    addGetter(TypedArrayPrototype$1, 'byteLength');
+	    addGetter(TypedArrayPrototype$1, 'length');
+	  }
 
+	  $$_({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+	    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+	    defineProperty: wrappedDefineProperty
+	  });
 
-	var STRING_ITERATOR = 'String Iterator';
-	var setInternalState$4 = internalState.set;
-	var getInternalState$4 = internalState.getterFor(STRING_ITERATOR);
+	  typedArrayConstructor.exports = function (TYPE, wrapper, CLAMPED) {
+	    var BYTES = TYPE.match(/\d+$/)[0] / 8;
+	    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
+	    var GETTER = 'get' + TYPE;
+	    var SETTER = 'set' + TYPE;
+	    var NativeTypedArrayConstructor = global$v[CONSTRUCTOR_NAME];
+	    var TypedArrayConstructor = NativeTypedArrayConstructor;
+	    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+	    var exported = {};
 
-	// `String.prototype[@@iterator]` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype-@@iterator
-	defineIterator(String, 'String', function (iterated) {
-	  setInternalState$4(this, {
-	    type: STRING_ITERATOR,
-	    string: String(iterated),
-	    index: 0
-	  });
-	// `%StringIteratorPrototype%.next` method
-	// https://tc39.github.io/ecma262/#sec-%stringiteratorprototype%.next
-	}, function next() {
-	  var state = getInternalState$4(this);
-	  var string = state.string;
-	  var index = state.index;
-	  var point;
-	  if (index >= string.length) return { value: undefined, done: true };
-	  point = charAt(string, index);
-	  state.index += point.length;
-	  return { value: point, done: false };
-	});
+	    var getter = function (that, index) {
+	      var data = getInternalState(that);
+	      return data.view[GETTER](index * BYTES + data.byteOffset, true);
+	    };
 
-	// TODO: Remove from `core-js@4` since it's moved to entry points
+	    var setter = function (that, index, value) {
+	      var data = getInternalState(that);
+	      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
+	      data.view[SETTER](index * BYTES + data.byteOffset, value, true);
+	    };
 
+	    var addElement = function (that, index) {
+	      nativeDefineProperty(that, index, {
+	        get: function () {
+	          return getter(this, index);
+	        },
+	        set: function (value) {
+	          return setter(this, index, value);
+	        },
+	        enumerable: true
+	      });
+	    };
 
+	    if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
+	        anInstance$4(that, TypedArrayConstructorPrototype);
+	        var index = 0;
+	        var byteOffset = 0;
+	        var buffer, byteLength, length;
+	        if (!isObject$f(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$7(WRONG_LENGTH);
+	            byteLength = $len - byteOffset;
+	            if (byteLength < 0) throw RangeError$7(WRONG_LENGTH);
+	          } else {
+	            byteLength = toLength$7($length) * BYTES;
+	            if (byteLength + byteOffset > $len) throw RangeError$7(WRONG_LENGTH);
+	          }
+	          length = byteLength / BYTES;
+	        } else if (isTypedArray(data)) {
+	          return fromList(TypedArrayConstructor, data);
+	        } else {
+	          return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
+	        }
+	        setInternalState$3(that, {
+	          buffer: buffer,
+	          byteOffset: byteOffset,
+	          byteLength: byteLength,
+	          length: length,
+	          view: new DataView$1(buffer)
+	        });
+	        while (index < length) addElement(that, index++);
+	      });
 
+	      if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+	      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create$7(TypedArrayPrototype$1);
+	    } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1) {
+	      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
+	        anInstance$4(dummy, TypedArrayConstructorPrototype);
+	        return inheritIfRequired$3(function () {
+	          if (!isObject$f(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$1(typedArrayOffset, BYTES))
+	              : new NativeTypedArrayConstructor(data);
+	          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
+	          return call$c(typedArrayFrom$1, 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;
+	    }
 
+	    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+	    }
 
+	    createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_CONSTRUCTOR$1, TypedArrayConstructor);
 
-	var SPECIES$6 = wellKnownSymbol('species');
+	    if (TYPED_ARRAY_TAG) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+	    }
 
-	var REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {
-	  // #replace needs built-in support for named groups.
-	  // #match works fine because it just return the exec results, even if it has
-	  // a "grops" property.
-	  var re = /./;
-	  re.exec = function () {
-	    var result = [];
-	    result.groups = { a: '7' };
-	    return result;
-	  };
-	  return ''.replace(re, '$<a>') !== '7';
-	});
+	    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
 
-	// 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 () {
-	  return 'a'.replace(/./, '$0') === '$0';
-	})();
+	    $$_({
+	      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
+	    }, exported);
 
-	var REPLACE = wellKnownSymbol('replace');
-	// 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;
-	})();
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
+	      createNonEnumerableProperty$2(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+	    }
 
-	// 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(function () {
-	  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';
+	    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 fixRegexpWellKnownSymbolLogic = function (KEY, length, exec, sham) {
-	  var SYMBOL = wellKnownSymbol(KEY);
+	var toObject$b = toObject$i;
+	var toAbsoluteIndex$4 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$b = lengthOfArrayLike$i;
 
-	  var DELEGATES_TO_SYMBOL = !fails(function () {
-	    // String methods call symbol-named RegEp methods
-	    var O = {};
-	    O[SYMBOL] = function () { return 7; };
-	    return ''[KEY](O) != 7;
-	  });
+	var min$7 = Math.min;
 
-	  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
-	    // Symbol-named RegExp methods call .exec
-	    var execCalled = false;
-	    var re = /a/;
+	// `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$b(this);
+	  var len = lengthOfArrayLike$b(O);
+	  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;
+	};
 
-	    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$6] = function () { return re; };
-	      re.flags = '';
-	      re[SYMBOL] = /./[SYMBOL];
-	    }
+	var uncurryThis$A = functionUncurryThis;
+	var ArrayBufferViewCore$m = arrayBufferViewCore;
+	var $ArrayCopyWithin = arrayCopyWithin;
 
-	    re.exec = function () { execCalled = true; return null; };
+	var u$ArrayCopyWithin = uncurryThis$A($ArrayCopyWithin);
+	var aTypedArray$l = ArrayBufferViewCore$m.aTypedArray;
+	var exportTypedArrayMethod$m = ArrayBufferViewCore$m.exportTypedArrayMethod;
 
-	    re[SYMBOL]('');
-	    return !execCalled;
-	  });
+	// `%TypedArray%.prototype.copyWithin` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+	exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+	  return u$ArrayCopyWithin(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+	});
 
-	  if (
-	    !DELEGATES_TO_SYMBOL ||
-	    !DELEGATES_TO_EXEC ||
-	    (KEY === 'replace' && !(
-	      REPLACE_SUPPORTS_NAMED_GROUPS &&
-	      REPLACE_KEEPS_$0 &&
-	      !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
-	    )) ||
-	    (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)
-	  ) {
-	    var nativeRegExpMethod = /./[SYMBOL];
-	    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
-	      if (regexp.exec === regexpExec) {
-	        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 };
-	    }, {
-	      REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,
-	      REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
-	    });
-	    var stringMethod = methods[0];
-	    var regexMethod = methods[1];
-
-	    redefine(String.prototype, KEY, stringMethod);
-	    redefine(RegExp.prototype, SYMBOL, length == 2
-	      // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)
-	      // 21.2.5.11 RegExp.prototype[@@split](string, limit)
-	      ? function (string, arg) { return regexMethod.call(string, this, arg); }
-	      // 21.2.5.6 RegExp.prototype[@@match](string)
-	      // 21.2.5.9 RegExp.prototype[@@search](string)
-	      : function (string) { return regexMethod.call(string, this); }
-	    );
-	  }
+	var ArrayBufferViewCore$l = arrayBufferViewCore;
+	var $every$1 = arrayIteration.every;
 
-	  if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);
-	};
+	var aTypedArray$k = ArrayBufferViewCore$l.aTypedArray;
+	var exportTypedArrayMethod$l = ArrayBufferViewCore$l.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 charAt$1 = stringMultibyte.charAt;
+	var ArrayBufferViewCore$k = arrayBufferViewCore;
+	var call$b = functionCall;
+	var $fill = arrayFill$1;
 
-	// `AdvanceStringIndex` abstract operation
-	// https://tc39.github.io/ecma262/#sec-advancestringindex
-	var advanceStringIndex = function (S, index, unicode) {
-	  return index + (unicode ? charAt$1(S, index).length : 1);
+	var aTypedArray$j = ArrayBufferViewCore$k.aTypedArray;
+	var exportTypedArrayMethod$k = ArrayBufferViewCore$k.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.fill` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
+	exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
+	  var length = arguments.length;
+	  return call$b(
+	    $fill,
+	    aTypedArray$j(this),
+	    value,
+	    length > 1 ? arguments[1] : undefined,
+	    length > 2 ? arguments[2] : undefined
+	  );
+	});
+
+	var lengthOfArrayLike$a = lengthOfArrayLike$i;
+
+	var arrayFromConstructorAndList$1 = function (Constructor, list) {
+	  var index = 0;
+	  var length = lengthOfArrayLike$a(list);
+	  var result = new Constructor(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
 	};
 
-	// `RegExpExec` abstract operation
-	// https://tc39.github.io/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;
-	  }
+	var ArrayBufferViewCore$j = arrayBufferViewCore;
+	var speciesConstructor$2 = speciesConstructor$5;
 
-	  if (classofRaw(R) !== 'RegExp') {
-	    throw TypeError('RegExp#exec called on incompatible receiver');
-	  }
+	var TYPED_ARRAY_CONSTRUCTOR = ArrayBufferViewCore$j.TYPED_ARRAY_CONSTRUCTOR;
+	var aTypedArrayConstructor = ArrayBufferViewCore$j.aTypedArrayConstructor;
 
-	  return regexpExec.call(R, S);
+	// a part of `TypedArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#typedarray-species-create
+	var typedArraySpeciesConstructor$4 = function (originalArray) {
+	  return aTypedArrayConstructor(speciesConstructor$2(originalArray, originalArray[TYPED_ARRAY_CONSTRUCTOR]));
 	};
 
-	var max$2 = Math.max;
-	var min$2 = Math.min;
-	var floor$2 = Math.floor;
-	var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d\d?|<[^>]*>)/g;
-	var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d\d?)/g;
+	var arrayFromConstructorAndList = arrayFromConstructorAndList$1;
+	var typedArraySpeciesConstructor$3 = typedArraySpeciesConstructor$4;
 
-	var maybeToString = function (it) {
-	  return it === undefined ? it : String(it);
+	var typedArrayFromSpeciesAndList = function (instance, list) {
+	  return arrayFromConstructorAndList(typedArraySpeciesConstructor$3(instance), list);
 	};
 
-	// @@replace logic
-	fixRegexpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative, reason) {
-	  var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE;
-	  var REPLACE_KEEPS_$0 = reason.REPLACE_KEEPS_$0;
-	  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
+	var ArrayBufferViewCore$i = arrayBufferViewCore;
+	var $filter$1 = arrayIteration.filter;
+	var fromSpeciesAndList = typedArrayFromSpeciesAndList;
 
-	  return [
-	    // `String.prototype.replace` method
-	    // https://tc39.github.io/ecma262/#sec-string.prototype.replace
-	    function replace(searchValue, replaceValue) {
-	      var O = requireObjectCoercible(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.github.io/ecma262/#sec-regexp.prototype-@@replace
-	    function (regexp, replaceValue) {
-	      if (
-	        (!REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE && REPLACE_KEEPS_$0) ||
-	        (typeof replaceValue === 'string' && replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1)
-	      ) {
-	        var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);
-	        if (res.done) return res.value;
-	      }
+	var aTypedArray$i = ArrayBufferViewCore$i.aTypedArray;
+	var exportTypedArrayMethod$j = ArrayBufferViewCore$i.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.filter` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
+	exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+	  var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  return fromSpeciesAndList(this, list);
+	});
 
-	      var rx = anObject(regexp);
-	      var S = String(this);
+	var ArrayBufferViewCore$h = arrayBufferViewCore;
+	var $find$1 = arrayIteration.find;
 
-	      var functionalReplace = typeof replaceValue === 'function';
-	      if (!functionalReplace) replaceValue = String(replaceValue);
+	var aTypedArray$h = ArrayBufferViewCore$h.aTypedArray;
+	var exportTypedArrayMethod$i = ArrayBufferViewCore$h.exportTypedArrayMethod;
 
-	      var global = rx.global;
-	      if (global) {
-	        var fullUnicode = rx.unicode;
-	        rx.lastIndex = 0;
-	      }
-	      var results = [];
-	      while (true) {
-	        var result = regexpExecAbstract(rx, S);
-	        if (result === null) break;
+	// `%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);
+	});
 
-	        results.push(result);
-	        if (!global) break;
+	var ArrayBufferViewCore$g = arrayBufferViewCore;
+	var $findIndex$1 = arrayIteration.findIndex;
 
-	        var matchStr = String(result[0]);
-	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
-	      }
+	var aTypedArray$g = ArrayBufferViewCore$g.aTypedArray;
+	var exportTypedArrayMethod$h = ArrayBufferViewCore$g.exportTypedArrayMethod;
 
-	      var accumulatedResult = '';
-	      var nextSourcePosition = 0;
-	      for (var i = 0; i < results.length; i++) {
-	        result = results[i];
+	// `%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 matched = String(result[0]);
-	        var position = max$2(min$2(toInteger(result.index), S.length), 0);
-	        var captures = [];
-	        // NOTE: This is equivalent to
-	        //   captures = result.slice(1).map(maybeToString)
-	        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
-	        // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
-	        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
-	        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
-	        var namedCaptures = result.groups;
-	        if (functionalReplace) {
-	          var replacerArgs = [matched].concat(captures, position, S);
-	          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
-	          var replacement = String(replaceValue.apply(undefined, replacerArgs));
-	        } else {
-	          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
-	        }
-	        if (position >= nextSourcePosition) {
-	          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
-	          nextSourcePosition = position + matched.length;
-	        }
-	      }
-	      return accumulatedResult + S.slice(nextSourcePosition);
-	    }
-	  ];
+	var ArrayBufferViewCore$f = arrayBufferViewCore;
+	var $forEach = arrayIteration.forEach;
 
-	  // https://tc39.github.io/ecma262/#sec-getsubstitution
-	  function getSubstitution(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(namedCaptures);
-	      symbols = SUBSTITUTION_SYMBOLS;
-	    }
-	    return nativeReplace.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$2(n / 10);
-	            if (f === 0) return match;
-	            if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
-	            return match;
-	          }
-	          capture = captures[n - 1];
-	      }
-	      return capture === undefined ? '' : capture;
-	    });
-	  }
+	var aTypedArray$f = ArrayBufferViewCore$f.aTypedArray;
+	var exportTypedArrayMethod$g = ArrayBufferViewCore$f.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.forEach` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
+	exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+	  $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
 	});
 
-	var MATCH = wellKnownSymbol('match');
+	var ArrayBufferViewCore$e = arrayBufferViewCore;
+	var $includes$1 = arrayIncludes.includes;
 
-	// `IsRegExp` abstract operation
-	// https://tc39.github.io/ecma262/#sec-isregexp
-	var isRegexp = function (it) {
-	  var isRegExp;
-	  return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classofRaw(it) == 'RegExp');
+	var aTypedArray$e = ArrayBufferViewCore$e.aTypedArray;
+	var exportTypedArrayMethod$f = ArrayBufferViewCore$e.exportTypedArrayMethod;
+
+	// `%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 ArrayBufferViewCore$d = arrayBufferViewCore;
+	var $indexOf = arrayIncludes.indexOf;
+
+	var aTypedArray$d = ArrayBufferViewCore$d.aTypedArray;
+	var exportTypedArrayMethod$e = ArrayBufferViewCore$d.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.indexOf` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
+	exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+	  return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
+
+	var global$u = global$1o;
+	var fails$z = fails$V;
+	var uncurryThis$z = functionUncurryThis;
+	var ArrayBufferViewCore$c = arrayBufferViewCore;
+	var ArrayIterators = es_array_iterator;
+	var wellKnownSymbol$9 = wellKnownSymbol$t;
+
+	var ITERATOR$4 = wellKnownSymbol$9('iterator');
+	var Uint8Array$2 = global$u.Uint8Array;
+	var arrayValues = uncurryThis$z(ArrayIterators.values);
+	var arrayKeys = uncurryThis$z(ArrayIterators.keys);
+	var arrayEntries = uncurryThis$z(ArrayIterators.entries);
+	var aTypedArray$c = ArrayBufferViewCore$c.aTypedArray;
+	var exportTypedArrayMethod$d = ArrayBufferViewCore$c.exportTypedArrayMethod;
+	var TypedArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype;
+
+	var GENERIC = !fails$z(function () {
+	  TypedArrayPrototype[ITERATOR$4].call([1]);
+	});
+
+	var ITERATOR_IS_VALUES = !!TypedArrayPrototype
+	  && TypedArrayPrototype.values
+	  && TypedArrayPrototype[ITERATOR$4] === TypedArrayPrototype.values
+	  && TypedArrayPrototype.values.name === 'values';
+
+	var typedArrayValues = function values() {
+	  return arrayValues(aTypedArray$c(this));
 	};
 
-	var arrayPush = [].push;
-	var min$3 = Math.min;
-	var MAX_UINT32 = 0xFFFFFFFF;
+	// `%TypedArray%.prototype.entries` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
+	exportTypedArrayMethod$d('entries', function entries() {
+	  return arrayEntries(aTypedArray$c(this));
+	}, GENERIC);
+	// `%TypedArray%.prototype.keys` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
+	exportTypedArrayMethod$d('keys', function keys() {
+	  return arrayKeys(aTypedArray$c(this));
+	}, GENERIC);
+	// `%TypedArray%.prototype.values` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+	exportTypedArrayMethod$d('values', typedArrayValues, GENERIC || !ITERATOR_IS_VALUES, { name: 'values' });
+	// `%TypedArray%.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
+	exportTypedArrayMethod$d(ITERATOR$4, typedArrayValues, GENERIC || !ITERATOR_IS_VALUES, { name: 'values' });
 
-	// babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError
-	var SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });
+	var ArrayBufferViewCore$b = arrayBufferViewCore;
+	var uncurryThis$y = functionUncurryThis;
 
-	// @@split logic
-	fixRegexpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {
-	  var internalSplit;
-	  if (
-	    'abbc'.split(/(b)*/)[1] == 'c' ||
-	    'test'.split(/(?:)/, -1).length != 4 ||
-	    'ab'.split(/(?:ab)*/).length != 2 ||
-	    '.'.split(/(.?)(.?)/).length != 4 ||
-	    '.'.split(/()()/).length > 1 ||
-	    ''.split(/.?/).length
-	  ) {
-	    // based on es5-shim implementation, need to rework it
-	    internalSplit = function (separator, limit) {
-	      var string = String(requireObjectCoercible(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(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;
+	var aTypedArray$b = ArrayBufferViewCore$b.aTypedArray;
+	var exportTypedArrayMethod$c = ArrayBufferViewCore$b.exportTypedArrayMethod;
+	var $join = uncurryThis$y([].join);
 
-	  return [
-	    // `String.prototype.split` method
-	    // https://tc39.github.io/ecma262/#sec-string.prototype.split
-	    function split(separator, limit) {
-	      var O = requireObjectCoercible(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.github.io/ecma262/#sec-regexp.prototype-@@split
-	    //
-	    // NOTE: This cannot be properly polyfilled in engines that don't support
-	    // the 'y' flag.
-	    function (regexp, limit) {
-	      var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);
-	      if (res.done) return res.value;
+	// `%TypedArray%.prototype.join` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
+	exportTypedArrayMethod$c('join', function join(separator) {
+	  return $join(aTypedArray$b(this), separator);
+	});
 
-	      var rx = anObject(regexp);
-	      var S = String(this);
-	      var C = speciesConstructor(rx, RegExp);
+	/* eslint-disable es/no-array-prototype-lastindexof -- safe */
+	var apply$6 = functionApply;
+	var toIndexedObject$5 = toIndexedObject$d;
+	var toIntegerOrInfinity$4 = toIntegerOrInfinity$b;
+	var lengthOfArrayLike$9 = lengthOfArrayLike$i;
+	var arrayMethodIsStrict$6 = arrayMethodIsStrict$9;
 
-	      var unicodeMatching = rx.unicode;
-	      var flags = (rx.ignoreCase ? 'i' : '') +
-	                  (rx.multiline ? 'm' : '') +
-	                  (rx.unicode ? 'u' : '') +
-	                  (SUPPORTS_Y ? 'y' : 'g');
+	var min$6 = Math.min;
+	var $lastIndexOf$1 = [].lastIndexOf;
+	var NEGATIVE_ZERO = !!$lastIndexOf$1 && 1 / [1].lastIndexOf(1, -0) < 0;
+	var STRICT_METHOD$6 = arrayMethodIsStrict$6('lastIndexOf');
+	var FORCED$f = NEGATIVE_ZERO || !STRICT_METHOD$6;
 
-	      // ^(? + rx + ) is needed, in combination with some S slicing, to
-	      // simulate the 'y' flag.
-	      var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);
-	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
-	      if (lim === 0) return [];
-	      if (S.length === 0) return regexpExecAbstract(splitter, S) === null ? [S] : [];
-	      var p = 0;
-	      var q = 0;
-	      var A = [];
-	      while (q < S.length) {
-	        splitter.lastIndex = SUPPORTS_Y ? q : 0;
-	        var z = regexpExecAbstract(splitter, SUPPORTS_Y ? S : S.slice(q));
-	        var e;
-	        if (
-	          z === null ||
-	          (e = min$3(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p
-	        ) {
-	          q = advanceStringIndex(S, q, unicodeMatching);
-	        } else {
-	          A.push(S.slice(p, q));
-	          if (A.length === lim) return A;
-	          for (var i = 1; i <= z.length - 1; i++) {
-	            A.push(z[i]);
-	            if (A.length === lim) return A;
-	          }
-	          q = p = e;
-	        }
-	      }
-	      A.push(S.slice(p));
-	      return A;
-	    }
-	  ];
-	}, !SUPPORTS_Y);
+	// `Array.prototype.lastIndexOf` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+	var arrayLastIndexOf = FORCED$f ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+	  // convert -0 to +0
+	  if (NEGATIVE_ZERO) return apply$6($lastIndexOf$1, this, arguments) || 0;
+	  var O = toIndexedObject$5(this);
+	  var length = lengthOfArrayLike$9(O);
+	  var index = length - 1;
+	  if (arguments.length > 1) index = min$6(index, toIntegerOrInfinity$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;
 
-	// a string of all valid unicode whitespaces
-	// eslint-disable-next-line max-len
-	var whitespaces = '\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 ArrayBufferViewCore$a = arrayBufferViewCore;
+	var apply$5 = functionApply;
+	var $lastIndexOf = arrayLastIndexOf;
 
-	var whitespace = '[' + whitespaces + ']';
-	var ltrim = RegExp('^' + whitespace + whitespace + '*');
-	var rtrim = RegExp(whitespace + whitespace + '*$');
+	var aTypedArray$a = ArrayBufferViewCore$a.aTypedArray;
+	var exportTypedArrayMethod$b = ArrayBufferViewCore$a.exportTypedArrayMethod;
 
-	// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
-	var createMethod$3 = function (TYPE) {
-	  return function ($this) {
-	    var string = String(requireObjectCoercible($this));
-	    if (TYPE & 1) string = string.replace(ltrim, '');
-	    if (TYPE & 2) string = string.replace(rtrim, '');
-	    return string;
+	// `%TypedArray%.prototype.lastIndexOf` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
+	exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+	  var length = arguments.length;
+	  return apply$5($lastIndexOf, aTypedArray$a(this), length > 1 ? [searchElement, arguments[1]] : [searchElement]);
+	});
+
+	var ArrayBufferViewCore$9 = arrayBufferViewCore;
+	var $map = arrayIteration.map;
+	var typedArraySpeciesConstructor$2 = typedArraySpeciesConstructor$4;
+
+	var aTypedArray$9 = ArrayBufferViewCore$9.aTypedArray;
+	var exportTypedArrayMethod$a = ArrayBufferViewCore$9.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.map` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
+	exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
+	  return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+	    return new (typedArraySpeciesConstructor$2(O))(length);
+	  });
+	});
+
+	var global$t = global$1o;
+	var aCallable$4 = aCallable$a;
+	var toObject$a = toObject$i;
+	var IndexedObject$2 = indexedObject;
+	var lengthOfArrayLike$8 = lengthOfArrayLike$i;
+
+	var TypeError$9 = global$t.TypeError;
+
+	// `Array.prototype.{ reduce, reduceRight }` methods implementation
+	var createMethod$3 = function (IS_RIGHT) {
+	  return function (that, callbackfn, argumentsLength, memo) {
+	    aCallable$4(callbackfn);
+	    var O = toObject$a(that);
+	    var self = IndexedObject$2(O);
+	    var length = lengthOfArrayLike$8(O);
+	    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$9('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 stringTrim = {
-	  // `String.prototype.{ trimLeft, trimStart }` methods
-	  // https://tc39.github.io/ecma262/#sec-string.prototype.trimstart
-	  start: createMethod$3(1),
-	  // `String.prototype.{ trimRight, trimEnd }` methods
-	  // https://tc39.github.io/ecma262/#sec-string.prototype.trimend
-	  end: createMethod$3(2),
-	  // `String.prototype.trim` method
-	  // https://tc39.github.io/ecma262/#sec-string.prototype.trim
-	  trim: createMethod$3(3)
+	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 non = '\u200B\u0085\u180E';
+	var ArrayBufferViewCore$8 = arrayBufferViewCore;
+	var $reduce$1 = arrayReduce.left;
 
-	// check that a method works with the correct list
-	// of whitespaces and has a correct name
-	var stringTrimForced = function (METHOD_NAME) {
-	  return fails(function () {
-	    return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;
-	  });
-	};
+	var aTypedArray$8 = ArrayBufferViewCore$8.aTypedArray;
+	var exportTypedArrayMethod$9 = ArrayBufferViewCore$8.exportTypedArrayMethod;
 
-	var $trim = stringTrim.trim;
+	// `%TypedArray%.prototype.reduce` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
+	exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
+	  var length = arguments.length;
+	  return $reduce$1(aTypedArray$8(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
+	});
 
+	var ArrayBufferViewCore$7 = arrayBufferViewCore;
+	var $reduceRight$1 = arrayReduce.right;
 
-	// `String.prototype.trim` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype.trim
-	_export({ target: 'String', proto: true, forced: stringTrimForced('trim') }, {
-	  trim: function trim() {
-	    return $trim(this);
-	  }
+	var aTypedArray$7 = ArrayBufferViewCore$7.aTypedArray;
+	var exportTypedArrayMethod$8 = ArrayBufferViewCore$7.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.reduceRicht` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
+	exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+	  var length = arguments.length;
+	  return $reduceRight$1(aTypedArray$7(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
+	});
+
+	var ArrayBufferViewCore$6 = arrayBufferViewCore;
+
+	var aTypedArray$6 = ArrayBufferViewCore$6.aTypedArray;
+	var exportTypedArrayMethod$7 = ArrayBufferViewCore$6.exportTypedArrayMethod;
+	var floor$5 = Math.floor;
+
+	// `%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;
 	});
 
-	/* eslint-disable no-new */
+	var global$s = global$1o;
+	var call$a = functionCall;
+	var ArrayBufferViewCore$5 = arrayBufferViewCore;
+	var lengthOfArrayLike$7 = lengthOfArrayLike$i;
+	var toOffset = toOffset$2;
+	var toIndexedObject$4 = toObject$i;
+	var fails$y = fails$V;
+
+	var RangeError$6 = global$s.RangeError;
+	var Int8Array$2 = global$s.Int8Array;
+	var Int8ArrayPrototype = Int8Array$2 && Int8Array$2.prototype;
+	var $set = Int8ArrayPrototype && Int8ArrayPrototype.set;
+	var aTypedArray$5 = ArrayBufferViewCore$5.aTypedArray;
+	var exportTypedArrayMethod$6 = ArrayBufferViewCore$5.exportTypedArrayMethod;
+
+	var WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS = !fails$y(function () {
+	  // eslint-disable-next-line es/no-typed-arrays -- required for testing
+	  var array = new Uint8ClampedArray(2);
+	  call$a($set, array, { length: 1, 0: 3 }, 1);
+	  return array[1] !== 3;
+	});
 
+	// https://bugs.chromium.org/p/v8/issues/detail?id=11294 and other
+	var TO_OBJECT_BUG = WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS && ArrayBufferViewCore$5.NATIVE_ARRAY_BUFFER_VIEWS && fails$y(function () {
+	  var array = new Int8Array$2(2);
+	  array.set(1);
+	  array.set('2', 1);
+	  return array[0] !== 0 || array[1] !== 2;
+	});
 
+	// `%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 src = toIndexedObject$4(arrayLike);
+	  if (WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS) return call$a($set, this, src, offset);
+	  var length = this.length;
+	  var len = lengthOfArrayLike$7(src);
+	  var index = 0;
+	  if (len + offset > length) throw RangeError$6('Wrong length');
+	  while (index < len) this[offset + index] = src[index++];
+	}, !WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS || TO_OBJECT_BUG);
 
-	var NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+	var ArrayBufferViewCore$4 = arrayBufferViewCore;
+	var typedArraySpeciesConstructor$1 = typedArraySpeciesConstructor$4;
+	var fails$x = fails$V;
+	var arraySlice$7 = arraySlice$b;
 
-	var ArrayBuffer$3 = global_1.ArrayBuffer;
-	var Int8Array$2 = global_1.Int8Array;
+	var aTypedArray$4 = ArrayBufferViewCore$4.aTypedArray;
+	var exportTypedArrayMethod$5 = ArrayBufferViewCore$4.exportTypedArrayMethod;
 
-	var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$2 || !fails(function () {
-	  Int8Array$2(1);
-	}) || !fails(function () {
-	  new Int8Array$2(-1);
-	}) || !checkCorrectnessOfIteration(function (iterable) {
-	  new Int8Array$2();
-	  new Int8Array$2(null);
-	  new Int8Array$2(1.5);
-	  new Int8Array$2(iterable);
-	}, true) || fails(function () {
-	  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
-	  return new Int8Array$2(new ArrayBuffer$3(2), 1, undefined).length !== 1;
+	var FORCED$e = fails$x(function () {
+	  // eslint-disable-next-line es/no-typed-arrays -- required for testing
+	  new Int8Array(1).slice();
 	});
 
-	var toPositiveInteger = function (it) {
-	  var result = toInteger(it);
-	  if (result < 0) throw RangeError("The argument can't be less than 0");
+	// `%TypedArray%.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
+	exportTypedArrayMethod$5('slice', function slice(start, end) {
+	  var list = arraySlice$7(aTypedArray$4(this), start, end);
+	  var C = typedArraySpeciesConstructor$1(this);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new C(length);
+	  while (length > index) result[index] = list[index++];
 	  return result;
-	};
+	}, FORCED$e);
 
-	var toOffset = function (it, BYTES) {
-	  var offset = toPositiveInteger(it);
-	  if (offset % BYTES) throw RangeError('Wrong offset');
-	  return offset;
+	var ArrayBufferViewCore$3 = arrayBufferViewCore;
+	var $some$1 = arrayIteration.some;
+
+	var aTypedArray$3 = ArrayBufferViewCore$3.aTypedArray;
+	var exportTypedArrayMethod$4 = ArrayBufferViewCore$3.exportTypedArrayMethod;
+
+	// `%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 arraySlice$6 = arraySliceSimple;
+
+	var floor$4 = Math.floor;
+
+	var mergeSort = function (array, comparefn) {
+	  var length = array.length;
+	  var middle = floor$4(length / 2);
+	  return length < 8 ? insertionSort(array, comparefn) : merge$5(
+	    array,
+	    mergeSort(arraySlice$6(array, 0, middle), comparefn),
+	    mergeSort(arraySlice$6(array, middle), comparefn),
+	    comparefn
+	  );
 	};
 
-	var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
+	var insertionSort = function (array, comparefn) {
+	  var length = array.length;
+	  var i = 1;
+	  var element, j;
 
-	var typedArrayFrom = function from(source /* , mapfn, thisArg */) {
-	  var O = toObject(source);
-	  var argumentsLength = arguments.length;
-	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
-	  var mapping = mapfn !== undefined;
-	  var iteratorMethod = getIteratorMethod(O);
-	  var i, length, result, step, iterator, next;
-	  if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {
-	    iterator = iteratorMethod.call(O);
-	    next = iterator.next;
-	    O = [];
-	    while (!(step = next.call(iterator)).done) {
-	      O.push(step.value);
+	  while (i < length) {
+	    j = i;
+	    element = array[i];
+	    while (j && comparefn(array[j - 1], element) > 0) {
+	      array[j] = array[--j];
 	    }
-	  }
-	  if (mapping && argumentsLength > 2) {
-	    mapfn = functionBindContext(mapfn, arguments[2], 2);
-	  }
-	  length = toLength(O.length);
-	  result = new (aTypedArrayConstructor$1(this))(length);
-	  for (i = 0; length > i; i++) {
-	    result[i] = mapping ? mapfn(O[i], i) : O[i];
-	  }
-	  return result;
+	    if (j !== i++) array[j] = element;
+	  } return array;
 	};
 
-	// makes subclassing work correct for wrapped built-ins
-	var inheritIfRequired = function ($this, dummy, Wrapper) {
-	  var NewTarget, NewTargetPrototype;
-	  if (
-	    // it can work only with native `setPrototypeOf`
-	    objectSetPrototypeOf &&
-	    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
-	    typeof (NewTarget = dummy.constructor) == 'function' &&
-	    NewTarget !== Wrapper &&
-	    isObject(NewTargetPrototype = NewTarget.prototype) &&
-	    NewTargetPrototype !== Wrapper.prototype
-	  ) objectSetPrototypeOf($this, NewTargetPrototype);
-	  return $this;
+	var merge$5 = function (array, left, right, comparefn) {
+	  var llength = left.length;
+	  var rlength = right.length;
+	  var lindex = 0;
+	  var rindex = 0;
+
+	  while (lindex < llength || rindex < rlength) {
+	    array[lindex + rindex] = (lindex < llength && rindex < rlength)
+	      ? comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]
+	      : lindex < llength ? left[lindex++] : right[rindex++];
+	  } return array;
 	};
 
-	var typedArrayConstructor = createCommonjsModule(function (module) {
+	var arraySort$1 = mergeSort;
 
+	var userAgent$3 = engineUserAgent;
 
+	var firefox = userAgent$3.match(/firefox\/(\d+)/i);
 
+	var engineFfVersion = !!firefox && +firefox[1];
 
+	var UA = engineUserAgent;
 
+	var engineIsIeOrEdge = /MSIE|Trident/.test(UA);
 
+	var userAgent$2 = engineUserAgent;
 
+	var webkit = userAgent$2.match(/AppleWebKit\/(\d+)\./);
 
+	var engineWebkitVersion = !!webkit && +webkit[1];
 
+	var global$r = global$1o;
+	var uncurryThis$x = functionUncurryThis;
+	var fails$w = fails$V;
+	var aCallable$3 = aCallable$a;
+	var internalSort$1 = arraySort$1;
+	var ArrayBufferViewCore$2 = arrayBufferViewCore;
+	var FF$1 = engineFfVersion;
+	var IE_OR_EDGE$1 = engineIsIeOrEdge;
+	var V8$1 = engineV8Version;
+	var WEBKIT$1 = engineWebkitVersion;
 
+	var Array$3 = global$r.Array;
+	var aTypedArray$2 = ArrayBufferViewCore$2.aTypedArray;
+	var exportTypedArrayMethod$3 = ArrayBufferViewCore$2.exportTypedArrayMethod;
+	var Uint16Array = global$r.Uint16Array;
+	var un$Sort$1 = Uint16Array && uncurryThis$x(Uint16Array.prototype.sort);
 
+	// WebKit
+	var ACCEPT_INCORRECT_ARGUMENTS = !!un$Sort$1 && !(fails$w(function () {
+	  un$Sort$1(new Uint16Array(2), null);
+	}) && fails$w(function () {
+	  un$Sort$1(new Uint16Array(2), {});
+	}));
 
+	var STABLE_SORT$1 = !!un$Sort$1 && !fails$w(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$3(516);
+	  var index, mod;
 
+	  for (index = 0; index < 516; index++) {
+	    mod = index % 4;
+	    array[index] = 515 - index;
+	    expected[index] = index - 2 * mod + 3;
+	  }
 
+	  un$Sort$1(array, function (a, b) {
+	    return (a / 4 | 0) - (b / 4 | 0);
+	  });
 
+	  for (index = 0; index < 516; index++) {
+	    if (array[index] !== expected[index]) return true;
+	  }
+	});
 
+	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;
+	  };
+	};
 
-	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+	// `%TypedArray%.prototype.sort` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
+	exportTypedArrayMethod$3('sort', function sort(comparefn) {
+	  if (comparefn !== undefined) aCallable$3(comparefn);
+	  if (STABLE_SORT$1) return un$Sort$1(this, comparefn);
 
-	var forEach = arrayIteration.forEach;
+	  return internalSort$1(aTypedArray$2(this), getSortCompare$1(comparefn));
+	}, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);
 
+	var ArrayBufferViewCore$1 = arrayBufferViewCore;
+	var toLength$6 = toLength$c;
+	var toAbsoluteIndex$3 = toAbsoluteIndex$9;
+	var typedArraySpeciesConstructor = typedArraySpeciesConstructor$4;
 
+	var aTypedArray$1 = ArrayBufferViewCore$1.aTypedArray;
+	var exportTypedArrayMethod$2 = ArrayBufferViewCore$1.exportTypedArrayMethod;
 
+	// `%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);
+	  var C = typedArraySpeciesConstructor(O);
+	  return new C(
+	    O.buffer,
+	    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
+	    toLength$6((end === undefined ? length : toAbsoluteIndex$3(end, length)) - beginIndex)
+	  );
+	});
 
+	var global$q = global$1o;
+	var apply$4 = functionApply;
+	var ArrayBufferViewCore = arrayBufferViewCore;
+	var fails$v = fails$V;
+	var arraySlice$5 = arraySlice$b;
 
+	var Int8Array$1 = global$q.Int8Array;
+	var aTypedArray = ArrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$1 = ArrayBufferViewCore.exportTypedArrayMethod;
+	var $toLocaleString = [].toLocaleString;
 
-	var getInternalState = internalState.get;
-	var setInternalState = internalState.set;
-	var nativeDefineProperty = objectDefineProperty.f;
-	var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
-	var round = Math.round;
-	var RangeError = global_1.RangeError;
-	var ArrayBuffer = arrayBuffer.ArrayBuffer;
-	var DataView = arrayBuffer.DataView;
-	var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
-	var TYPED_ARRAY_TAG = arrayBufferViewCore.TYPED_ARRAY_TAG;
-	var TypedArray = arrayBufferViewCore.TypedArray;
-	var TypedArrayPrototype = arrayBufferViewCore.TypedArrayPrototype;
-	var aTypedArrayConstructor = arrayBufferViewCore.aTypedArrayConstructor;
-	var isTypedArray = arrayBufferViewCore.isTypedArray;
-	var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
-	var WRONG_LENGTH = 'Wrong length';
+	// iOS Safari 6.x fails here
+	var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails$v(function () {
+	  $toLocaleString.call(new Int8Array$1(1));
+	});
 
-	var fromList = function (C, list) {
-	  var index = 0;
-	  var length = list.length;
-	  var result = new (aTypedArrayConstructor(C))(length);
-	  while (length > index) result[index] = list[index++];
-	  return result;
-	};
+	var FORCED$d = fails$v(function () {
+	  return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
+	}) || !fails$v(function () {
+	  Int8Array$1.prototype.toLocaleString.call([1, 2]);
+	});
 
-	var addGetter = function (it, key) {
-	  nativeDefineProperty(it, key, { get: function () {
-	    return getInternalState(this)[key];
-	  } });
-	};
+	// `%TypedArray%.prototype.toLocaleString` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
+	exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
+	  return apply$4(
+	    $toLocaleString,
+	    TO_LOCALE_STRING_BUG ? arraySlice$5(aTypedArray(this)) : aTypedArray(this),
+	    arraySlice$5(arguments)
+	  );
+	}, FORCED$d);
 
-	var isArrayBuffer = function (it) {
-	  var klass;
-	  return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
-	};
+	var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;
+	var fails$u = fails$V;
+	var global$p = global$1o;
+	var uncurryThis$w = functionUncurryThis;
 
-	var isTypedArrayIndex = function (target, key) {
-	  return isTypedArray(target)
-	    && typeof key != 'symbol'
-	    && key in target
-	    && String(+key) == String(key);
-	};
+	var Uint8Array$1 = global$p.Uint8Array;
+	var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
+	var arrayToString = [].toString;
+	var join$5 = uncurryThis$w([].join);
 
-	var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
-	  return isTypedArrayIndex(target, key = toPrimitive(key, true))
-	    ? createPropertyDescriptor(2, target[key])
-	    : nativeGetOwnPropertyDescriptor(target, key);
-	};
+	if (fails$u(function () { arrayToString.call({}); })) {
+	  arrayToString = function toString() {
+	    return join$5(this);
+	  };
+	}
 
-	var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
-	  if (isTypedArrayIndex(target, key = toPrimitive(key, true))
-	    && isObject(descriptor)
-	    && has(descriptor, 'value')
-	    && !has(descriptor, 'get')
-	    && !has(descriptor, 'set')
-	    // TODO: add validation descriptor w/o calling accessors
-	    && !descriptor.configurable
-	    && (!has(descriptor, 'writable') || descriptor.writable)
-	    && (!has(descriptor, 'enumerable') || descriptor.enumerable)
-	  ) {
-	    target[key] = descriptor.value;
-	    return target;
-	  } return nativeDefineProperty(target, key, descriptor);
-	};
+	var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
 
-	if (descriptors) {
-	  if (!NATIVE_ARRAY_BUFFER_VIEWS) {
-	    objectGetOwnPropertyDescriptor.f = wrappedGetOwnPropertyDescriptor;
-	    objectDefineProperty.f = wrappedDefineProperty;
-	    addGetter(TypedArrayPrototype, 'buffer');
-	    addGetter(TypedArrayPrototype, 'byteOffset');
-	    addGetter(TypedArrayPrototype, 'byteLength');
-	    addGetter(TypedArrayPrototype, 'length');
-	  }
+	// `%TypedArray%.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
+	exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);
 
-	  _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
-	    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
-	    defineProperty: wrappedDefineProperty
-	  });
+	var $$Z = _export;
+	var uncurryThis$v = functionUncurryThis;
+	var IndexedObject$1 = indexedObject;
+	var toIndexedObject$3 = toIndexedObject$d;
+	var arrayMethodIsStrict$5 = arrayMethodIsStrict$9;
 
-	  module.exports = function (TYPE, wrapper, CLAMPED) {
-	    var BYTES = TYPE.match(/\d+$/)[0] / 8;
-	    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
-	    var GETTER = 'get' + TYPE;
-	    var SETTER = 'set' + TYPE;
-	    var NativeTypedArrayConstructor = global_1[CONSTRUCTOR_NAME];
-	    var TypedArrayConstructor = NativeTypedArrayConstructor;
-	    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
-	    var exported = {};
+	var un$Join = uncurryThis$v([].join);
 
-	    var getter = function (that, index) {
-	      var data = getInternalState(that);
-	      return data.view[GETTER](index * BYTES + data.byteOffset, true);
-	    };
+	var ES3_STRINGS = IndexedObject$1 != Object;
+	var STRICT_METHOD$5 = arrayMethodIsStrict$5('join', ',');
 
-	    var setter = function (that, index, value) {
-	      var data = getInternalState(that);
-	      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
-	      data.view[SETTER](index * BYTES + data.byteOffset, value, true);
-	    };
+	// `Array.prototype.join` method
+	// https://tc39.es/ecma262/#sec-array.prototype.join
+	$$Z({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$5 }, {
+	  join: function join(separator) {
+	    return un$Join(toIndexedObject$3(this), separator === undefined ? ',' : separator);
+	  }
+	});
 
-	    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 $$Y = _export;
+	var global$o = global$1o;
+	var isArray$4 = isArray$8;
+	var isConstructor$1 = isConstructor$4;
+	var isObject$e = isObject$s;
+	var toAbsoluteIndex$2 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$6 = lengthOfArrayLike$i;
+	var toIndexedObject$2 = toIndexedObject$d;
+	var createProperty$3 = createProperty$5;
+	var wellKnownSymbol$8 = wellKnownSymbol$t;
+	var arrayMethodHasSpeciesSupport$3 = arrayMethodHasSpeciesSupport$5;
+	var un$Slice = arraySlice$b;
+
+	var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport$3('slice');
+
+	var SPECIES$1 = wellKnownSymbol$8('species');
+	var Array$2 = global$o.Array;
+	var max$3 = Math.max;
 
-	    if (!NATIVE_ARRAY_BUFFER_VIEWS) {
-	      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
-	        anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
-	        var index = 0;
-	        var byteOffset = 0;
-	        var buffer, byteLength, length;
-	        if (!isObject(data)) {
-	          length = toIndex(data);
-	          byteLength = length * BYTES;
-	          buffer = new ArrayBuffer(byteLength);
-	        } else if (isArrayBuffer(data)) {
-	          buffer = data;
-	          byteOffset = toOffset(offset, BYTES);
-	          var $len = data.byteLength;
-	          if ($length === undefined) {
-	            if ($len % BYTES) throw RangeError(WRONG_LENGTH);
-	            byteLength = $len - byteOffset;
-	            if (byteLength < 0) throw RangeError(WRONG_LENGTH);
-	          } else {
-	            byteLength = toLength($length) * BYTES;
-	            if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
-	          }
-	          length = byteLength / BYTES;
-	        } else if (isTypedArray(data)) {
-	          return fromList(TypedArrayConstructor, data);
-	        } else {
-	          return typedArrayFrom.call(TypedArrayConstructor, data);
-	        }
-	        setInternalState(that, {
-	          buffer: buffer,
-	          byteOffset: byteOffset,
-	          byteLength: byteLength,
-	          length: length,
-	          view: new DataView(buffer)
-	        });
-	        while (index < length) addElement(that, index++);
-	      });
-
-	      if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
-	      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = objectCreate(TypedArrayPrototype);
-	    } else if (typedArrayConstructorsRequireWrappers) {
-	      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
-	        anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
-	        return inheritIfRequired(function () {
-	          if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
-	          if (isArrayBuffer(data)) return $length !== undefined
-	            ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
-	            : typedArrayOffset !== undefined
-	              ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
-	              : new NativeTypedArrayConstructor(data);
-	          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
-	          return typedArrayFrom.call(TypedArrayConstructor, data);
-	        }(), dummy, TypedArrayConstructor);
-	      });
-
-	      if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
-	      forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
-	        if (!(key in TypedArrayConstructor)) {
-	          createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
-	        }
-	      });
-	      TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
-	    }
-
-	    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
-	      createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+	// `Array.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-array.prototype.slice
+	// fallback for not array-like ES3 strings and DOM objects
+	$$Y({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
+	  slice: function slice(start, end) {
+	    var O = toIndexedObject$2(this);
+	    var length = lengthOfArrayLike$6(O);
+	    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$4(O)) {
+	      Constructor = O.constructor;
+	      // cross-realm fallback
+	      if (isConstructor$1(Constructor) && (Constructor === Array$2 || isArray$4(Constructor.prototype))) {
+	        Constructor = undefined;
+	      } else if (isObject$e(Constructor)) {
+	        Constructor = Constructor[SPECIES$1];
+	        if (Constructor === null) Constructor = undefined;
+	      }
+	      if (Constructor === Array$2 || Constructor === undefined) {
+	        return un$Slice(O, k, fin);
+	      }
 	    }
+	    result = new (Constructor === undefined ? Array$2 : 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;
+	  }
+	});
 
-	    if (TYPED_ARRAY_TAG) {
-	      createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
-	    }
+	var fails$t = fails$V;
+	var wellKnownSymbol$7 = wellKnownSymbol$t;
+	var IS_PURE = isPure;
 
-	    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
+	var ITERATOR$3 = wellKnownSymbol$7('iterator');
 
-	    _export({
-	      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
-	    }, exported);
+	var nativeUrl = !fails$t(function () {
+	  // eslint-disable-next-line unicorn/relative-url-style -- required for testing
+	  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$3]
+	    // 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';
+	});
 
-	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
-	      createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
-	    }
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
 
-	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
-	      createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
-	    }
+	var $$X = _export;
+	var global$n = global$1o;
+	var getBuiltIn$2 = getBuiltIn$b;
+	var call$9 = functionCall;
+	var uncurryThis$u = functionUncurryThis;
+	var USE_NATIVE_URL$1 = nativeUrl;
+	var redefine$7 = redefine$h.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 isCallable$5 = isCallable$r;
+	var hasOwn$6 = hasOwnProperty_1;
+	var bind$8 = functionBindContext;
+	var classof$3 = classof$d;
+	var anObject$9 = anObject$n;
+	var isObject$d = isObject$s;
+	var $toString$2 = toString$k;
+	var create$6 = objectCreate;
+	var createPropertyDescriptor = createPropertyDescriptor$7;
+	var getIterator$1 = getIterator$4;
+	var getIteratorMethod$1 = getIteratorMethod$5;
+	var validateArgumentsLength$2 = validateArgumentsLength$4;
+	var wellKnownSymbol$6 = wellKnownSymbol$t;
+	var arraySort = arraySort$1;
+
+	var ITERATOR$2 = 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$2.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+
+	var n$Fetch = getBuiltIn$2('fetch');
+	var N$Request = getBuiltIn$2('Request');
+	var Headers$1 = getBuiltIn$2('Headers');
+	var RequestPrototype = N$Request && N$Request.prototype;
+	var HeadersPrototype = Headers$1 && Headers$1.prototype;
+	var RegExp$1 = global$n.RegExp;
+	var TypeError$8 = global$n.TypeError;
+	var decodeURIComponent$1 = global$n.decodeURIComponent;
+	var encodeURIComponent$1 = global$n.encodeURIComponent;
+	var charAt$5 = uncurryThis$u(''.charAt);
+	var join$4 = uncurryThis$u([].join);
+	var push$7 = uncurryThis$u([].push);
+	var replace$6 = uncurryThis$u(''.replace);
+	var shift$1 = uncurryThis$u([].shift);
+	var splice = uncurryThis$u([].splice);
+	var split$3 = uncurryThis$u(''.split);
+	var stringSlice$8 = uncurryThis$u(''.slice);
 
-	    setSpecies(CONSTRUCTOR_NAME);
-	  };
-	} else module.exports = function () { /* empty */ };
-	});
+	var plus = /\+/g;
+	var sequences = Array(4);
 
-	// `Uint8Array` constructor
-	// https://tc39.github.io/ecma262/#sec-typedarray-objects
-	typedArrayConstructor('Uint8', function (init) {
-	  return function Uint8Array(data, byteOffset, length) {
-	    return init(this, data, byteOffset, length);
-	  };
-	});
+	var percentSequence = function (bytes) {
+	  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp$1('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
+	};
 
-	var min$4 = Math.min;
+	var percentDecode = function (sequence) {
+	  try {
+	    return decodeURIComponent$1(sequence);
+	  } catch (error) {
+	    return sequence;
+	  }
+	};
 
-	// `Array.prototype.copyWithin` method implementation
-	// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin
-	var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
-	  var O = toObject(this);
-	  var len = toLength(O.length);
-	  var to = toAbsoluteIndex(target, len);
-	  var from = toAbsoluteIndex(start, len);
-	  var end = arguments.length > 2 ? arguments[2] : undefined;
-	  var count = min$4((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
-	  var inc = 1;
-	  if (from < to && to < from + count) {
-	    inc = -1;
-	    from += count - 1;
-	    to += count - 1;
+	var deserialize = function (it) {
+	  var result = replace$6(it, plus, ' ');
+	  var bytes = 4;
+	  try {
+	    return decodeURIComponent$1(result);
+	  } catch (error) {
+	    while (bytes) {
+	      result = replace$6(result, percentSequence(bytes--), percentDecode);
+	    }
+	    return result;
 	  }
-	  while (count-- > 0) {
-	    if (from in O) O[to] = O[from];
-	    else delete O[to];
-	    to += inc;
-	    from += inc;
-	  } return O;
 	};
 
-	var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
+	var find$1 = /[!'()~]|%20/g;
 
-	// `%TypedArray%.prototype.copyWithin` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.copywithin
-	exportTypedArrayMethod$1('copyWithin', function copyWithin(target, start /* , end */) {
-	  return arrayCopyWithin.call(aTypedArray$1(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
-	});
+	var replacements = {
+	  '!': '%21',
+	  "'": '%27',
+	  '(': '%28',
+	  ')': '%29',
+	  '~': '%7E',
+	  '%20': '+'
+	};
 
-	var $every = arrayIteration.every;
+	var replacer = function (match) {
+	  return replacements[match];
+	};
 
-	var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;
+	var serialize = function (it) {
+	  return replace$6(encodeURIComponent$1(it), find$1, replacer);
+	};
 
-	// `%TypedArray%.prototype.every` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.every
-	exportTypedArrayMethod$2('every', function every(callbackfn /* , thisArg */) {
-	  return $every(aTypedArray$2(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
+	  setInternalState$2(this, {
+	    type: URL_SEARCH_PARAMS_ITERATOR,
+	    iterator: getIterator$1(getInternalParamsState(params).entries),
+	    kind: kind
+	  });
+	}, '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;
+	}, true);
 
-	var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
+	var URLSearchParamsState = function (init) {
+	  this.entries = [];
+	  this.url = null;
 
-	// `%TypedArray%.prototype.fill` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill
-	// eslint-disable-next-line no-unused-vars
-	exportTypedArrayMethod$3('fill', function fill(value /* , start, end */) {
-	  return arrayFill.apply(aTypedArray$3(this), arguments);
-	});
+	  if (init !== undefined) {
+	    if (isObject$d(init)) this.parseObject(init);
+	    else this.parseQuery(typeof init == 'string' ? charAt$5(init, 0) === '?' ? stringSlice$8(init, 1) : init : $toString$2(init));
+	  }
+	};
 
-	var $filter = arrayIteration.filter;
+	URLSearchParamsState.prototype = {
+	  type: URL_SEARCH_PARAMS,
+	  bindURL: function (url) {
+	    this.url = url;
+	    this.update();
+	  },
+	  parseObject: function (object) {
+	    var iteratorMethod = getIteratorMethod$1(object);
+	    var iterator, next, step, entryIterator, entryNext, first, second;
+
+	    if (iteratorMethod) {
+	      iterator = getIterator$1(object, iteratorMethod);
+	      next = iterator.next;
+	      while (!(step = call$9(next, iterator)).done) {
+	        entryIterator = getIterator$1(anObject$9(step.value));
+	        entryNext = entryIterator.next;
+	        if (
+	          (first = call$9(entryNext, entryIterator)).done ||
+	          (second = call$9(entryNext, entryIterator)).done ||
+	          !call$9(entryNext, entryIterator).done
+	        ) throw TypeError$8('Expected sequence with length 2');
+	        push$7(this.entries, { key: $toString$2(first.value), value: $toString$2(second.value) });
+	      }
+	    } else for (var key in object) if (hasOwn$6(object, key)) {
+	      push$7(this.entries, { key: key, value: $toString$2(object[key]) });
+	    }
+	  },
+	  parseQuery: function (query) {
+	    if (query) {
+	      var attributes = split$3(query, '&');
+	      var index = 0;
+	      var attribute, entry;
+	      while (index < attributes.length) {
+	        attribute = attributes[index++];
+	        if (attribute.length) {
+	          entry = split$3(attribute, '=');
+	          push$7(this.entries, {
+	            key: deserialize(shift$1(entry)),
+	            value: deserialize(join$4(entry, '='))
+	          });
+	        }
+	      }
+	    }
+	  },
+	  serialize: function () {
+	    var entries = this.entries;
+	    var result = [];
+	    var index = 0;
+	    var entry;
+	    while (index < entries.length) {
+	      entry = entries[index++];
+	      push$7(result, serialize(entry.key) + '=' + serialize(entry.value));
+	    } return join$4(result, '&');
+	  },
+	  update: function () {
+	    this.entries.length = 0;
+	    this.parseQuery(this.url.query);
+	  },
+	  updateURL: function () {
+	    if (this.url) this.url.update();
+	  }
+	};
 
+	// `URLSearchParams` constructor
+	// https://url.spec.whatwg.org/#interface-urlsearchparams
+	var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
+	  anInstance$3(this, URLSearchParamsPrototype);
+	  var init = arguments.length > 0 ? arguments[0] : undefined;
+	  setInternalState$2(this, new URLSearchParamsState(init));
+	};
 
-	var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
-	var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
-	var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;
+	var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
 
-	// `%TypedArray%.prototype.filter` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.filter
-	exportTypedArrayMethod$4('filter', function filter(callbackfn /* , thisArg */) {
-	  var list = $filter(aTypedArray$4(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	  var C = speciesConstructor(this, this.constructor);
-	  var index = 0;
-	  var length = list.length;
-	  var result = new (aTypedArrayConstructor$2(C))(length);
-	  while (length > index) result[index] = list[index++];
-	  return result;
-	});
+	redefineAll$1(URLSearchParamsPrototype, {
+	  // `URLSearchParams.prototype.append` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-append
+	  append: function append(name, value) {
+	    validateArgumentsLength$2(arguments.length, 2);
+	    var state = getInternalParamsState(this);
+	    push$7(state.entries, { key: $toString$2(name), value: $toString$2(value) });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.delete` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
+	  'delete': function (name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var key = $toString$2(name);
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index].key === key) splice(entries, index, 1);
+	      else index++;
+	    }
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.get` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-get
+	  get: function get(name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = $toString$2(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$2(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = $toString$2(name);
+	    var result = [];
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) push$7(result, entries[index].value);
+	    }
+	    return result;
+	  },
+	  // `URLSearchParams.prototype.has` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-has
+	  has: function has(name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = $toString$2(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$2(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var found = false;
+	    var key = $toString$2(name);
+	    var val = $toString$2(value);
+	    var index = 0;
+	    var entry;
+	    for (; index < entries.length; index++) {
+	      entry = entries[index];
+	      if (entry.key === key) {
+	        if (found) splice(entries, index--, 1);
+	        else {
+	          found = true;
+	          entry.value = val;
+	        }
+	      }
+	    }
+	    if (!found) push$7(entries, { 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);
+	    arraySort(state.entries, function (a, b) {
+	      return a.key > b.key ? 1 : -1;
+	    });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.forEach` method
+	  forEach: function forEach(callback /* , thisArg */) {
+	    var entries = getInternalParamsState(this).entries;
+	    var boundFunction = bind$8(callback, arguments.length > 1 ? arguments[1] : undefined);
+	    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');
+	  }
+	}, { enumerable: true });
 
-	var $find = arrayIteration.find;
+	// `URLSearchParams.prototype[@@iterator]` method
+	redefine$7(URLSearchParamsPrototype, ITERATOR$2, URLSearchParamsPrototype.entries, { name: 'entries' });
 
-	var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
+	// `URLSearchParams.prototype.toString` method
+	// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
+	redefine$7(URLSearchParamsPrototype, 'toString', function toString() {
+	  return getInternalParamsState(this).serialize();
+	}, { enumerable: true });
 
-	// `%TypedArray%.prototype.find` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.find
-	exportTypedArrayMethod$5('find', function find(predicate /* , thisArg */) {
-	  return $find(aTypedArray$5(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	setToStringTag$4(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
 
-	var $findIndex = arrayIteration.findIndex;
+	$$X({ global: true, forced: !USE_NATIVE_URL$1 }, {
+	  URLSearchParams: URLSearchParamsConstructor
+	});
 
-	var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;
+	// Wrap `fetch` and `Request` for correct work with polyfilled `URLSearchParams`
+	if (!USE_NATIVE_URL$1 && isCallable$5(Headers$1)) {
+	  var headersHas = uncurryThis$u(HeadersPrototype.has);
+	  var headersSet = uncurryThis$u(HeadersPrototype.set);
+
+	  var wrapRequestOptions = function (init) {
+	    if (isObject$d(init)) {
+	      var body = init.body;
+	      var headers;
+	      if (classof$3(body) === URL_SEARCH_PARAMS) {
+	        headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
+	        if (!headersHas(headers, 'content-type')) {
+	          headersSet(headers, 'content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+	        }
+	        return create$6(init, {
+	          body: createPropertyDescriptor(0, $toString$2(body)),
+	          headers: createPropertyDescriptor(0, headers)
+	        });
+	      }
+	    } return init;
+	  };
 
-	// `%TypedArray%.prototype.findIndex` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findindex
-	exportTypedArrayMethod$6('findIndex', function findIndex(predicate /* , thisArg */) {
-	  return $findIndex(aTypedArray$6(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	  if (isCallable$5(n$Fetch)) {
+	    $$X({ global: true, enumerable: true, forced: true }, {
+	      fetch: function fetch(input /* , init */) {
+	        return n$Fetch(input, arguments.length > 1 ? wrapRequestOptions(arguments[1]) : {});
+	      }
+	    });
+	  }
 
-	var $forEach$2 = arrayIteration.forEach;
+	  if (isCallable$5(N$Request)) {
+	    var RequestConstructor = function Request(input /* , init */) {
+	      anInstance$3(this, RequestPrototype);
+	      return new N$Request(input, arguments.length > 1 ? wrapRequestOptions(arguments[1]) : {});
+	    };
 
-	var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
+	    RequestPrototype.constructor = RequestConstructor;
+	    RequestConstructor.prototype = RequestPrototype;
 
-	// `%TypedArray%.prototype.forEach` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.foreach
-	exportTypedArrayMethod$7('forEach', function forEach(callbackfn /* , thisArg */) {
-	  $forEach$2(aTypedArray$7(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	    $$X({ global: true, forced: true }, {
+	      Request: RequestConstructor
+	    });
+	  }
+	}
 
-	var $includes = arrayIncludes.includes;
+	var web_urlSearchParams = {
+	  URLSearchParams: URLSearchParamsConstructor,
+	  getState: getInternalParamsState
+	};
 
-	var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;
+	var uncurryThis$t = functionUncurryThis;
+	var PROPER_FUNCTION_NAME$1 = functionName.PROPER;
+	var redefine$6 = redefine$h.exports;
+	var anObject$8 = anObject$n;
+	var isPrototypeOf$2 = objectIsPrototypeOf;
+	var $toString$1 = toString$k;
+	var fails$s = fails$V;
+	var regExpFlags$2 = regexpFlags$1;
 
-	// `%TypedArray%.prototype.includes` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.includes
-	exportTypedArrayMethod$8('includes', function includes(searchElement /* , fromIndex */) {
-	  return $includes(aTypedArray$8(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	var TO_STRING = 'toString';
+	var RegExpPrototype$3 = RegExp.prototype;
+	var n$ToString = RegExpPrototype$3[TO_STRING];
+	var getFlags$1 = uncurryThis$t(regExpFlags$2);
 
-	var $indexOf$1 = arrayIncludes.indexOf;
+	var NOT_GENERIC = fails$s(function () { return n$ToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+	// FF44- RegExp#toString has a wrong name
+	var INCORRECT_NAME = PROPER_FUNCTION_NAME$1 && n$ToString.name != TO_STRING;
 
-	var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$9 = arrayBufferViewCore.exportTypedArrayMethod;
+	// `RegExp.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-regexp.prototype.tostring
+	if (NOT_GENERIC || INCORRECT_NAME) {
+	  redefine$6(RegExp.prototype, TO_STRING, function toString() {
+	    var R = anObject$8(this);
+	    var p = $toString$1(R.source);
+	    var rf = R.flags;
+	    var f = $toString$1(rf === undefined && isPrototypeOf$2(RegExpPrototype$3, R) && !('flags' in RegExpPrototype$3) ? getFlags$1(R) : rf);
+	    return '/' + p + '/' + f;
+	  }, { unsafe: true });
+	}
 
-	// `%TypedArray%.prototype.indexOf` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.indexof
-	exportTypedArrayMethod$9('indexOf', function indexOf(searchElement /* , fromIndex */) {
-	  return $indexOf$1(aTypedArray$9(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	// TODO: Remove from `core-js@4` since it's moved to entry points
 
-	var ITERATOR$5 = wellKnownSymbol('iterator');
-	var Uint8Array$1 = global_1.Uint8Array;
-	var arrayValues = es_array_iterator.values;
-	var arrayKeys = es_array_iterator.keys;
-	var arrayEntries = es_array_iterator.entries;
-	var aTypedArray$a = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$a = arrayBufferViewCore.exportTypedArrayMethod;
-	var nativeTypedArrayIterator = Uint8Array$1 && Uint8Array$1.prototype[ITERATOR$5];
+	var uncurryThis$s = functionUncurryThis;
+	var redefine$5 = redefine$h.exports;
+	var regexpExec$2 = regexpExec$3;
+	var fails$r = fails$V;
+	var wellKnownSymbol$5 = wellKnownSymbol$t;
+	var createNonEnumerableProperty$1 = createNonEnumerableProperty$b;
 
-	var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
-	  && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);
+	var SPECIES = wellKnownSymbol$5('species');
+	var RegExpPrototype$2 = RegExp.prototype;
 
-	var typedArrayValues = function values() {
-	  return arrayValues.call(aTypedArray$a(this));
-	};
+	var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
+	  var SYMBOL = wellKnownSymbol$5(KEY);
 
-	// `%TypedArray%.prototype.entries` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.entries
-	exportTypedArrayMethod$a('entries', function entries() {
-	  return arrayEntries.call(aTypedArray$a(this));
-	});
-	// `%TypedArray%.prototype.keys` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.keys
-	exportTypedArrayMethod$a('keys', function keys() {
-	  return arrayKeys.call(aTypedArray$a(this));
-	});
-	// `%TypedArray%.prototype.values` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.values
-	exportTypedArrayMethod$a('values', typedArrayValues, !CORRECT_ITER_NAME);
-	// `%TypedArray%.prototype[@@iterator]` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype-@@iterator
-	exportTypedArrayMethod$a(ITERATOR$5, typedArrayValues, !CORRECT_ITER_NAME);
+	  var DELEGATES_TO_SYMBOL = !fails$r(function () {
+	    // String methods call symbol-named RegEp methods
+	    var O = {};
+	    O[SYMBOL] = function () { return 7; };
+	    return ''[KEY](O) != 7;
+	  });
 
-	var aTypedArray$b = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;
-	var $join = [].join;
+	  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails$r(function () {
+	    // Symbol-named RegExp methods call .exec
+	    var execCalled = false;
+	    var re = /a/;
 
-	// `%TypedArray%.prototype.join` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join
-	// eslint-disable-next-line no-unused-vars
-	exportTypedArrayMethod$b('join', function join(separator) {
-	  return $join.apply(aTypedArray$b(this), arguments);
-	});
+	    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];
+	    }
 
-	var min$5 = Math.min;
-	var nativeLastIndexOf = [].lastIndexOf;
-	var NEGATIVE_ZERO$1 = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
-	var STRICT_METHOD$3 = arrayMethodIsStrict('lastIndexOf');
-	// For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method
-	var USES_TO_LENGTH$4 = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
-	var FORCED$1 = NEGATIVE_ZERO$1 || !STRICT_METHOD$3 || !USES_TO_LENGTH$4;
+	    re.exec = function () { execCalled = true; return null; };
 
-	// `Array.prototype.lastIndexOf` method implementation
-	// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
-	var arrayLastIndexOf = FORCED$1 ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
-	  // convert -0 to +0
-	  if (NEGATIVE_ZERO$1) return nativeLastIndexOf.apply(this, arguments) || 0;
-	  var O = toIndexedObject(this);
-	  var length = toLength(O.length);
-	  var index = length - 1;
-	  if (arguments.length > 1) index = min$5(index, toInteger(arguments[1]));
-	  if (index < 0) index = length + index;
-	  for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
-	  return -1;
-	} : nativeLastIndexOf;
+	    re[SYMBOL]('');
+	    return !execCalled;
+	  });
 
-	var aTypedArray$c = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
+	  if (
+	    !DELEGATES_TO_SYMBOL ||
+	    !DELEGATES_TO_EXEC ||
+	    FORCED
+	  ) {
+	    var uncurriedNativeRegExpMethod = uncurryThis$s(/./[SYMBOL]);
+	    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+	      var uncurriedNativeMethod = uncurryThis$s(nativeMethod);
+	      var $exec = regexp.exec;
+	      if ($exec === regexpExec$2 || $exec === RegExpPrototype$2.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: uncurriedNativeRegExpMethod(regexp, str, arg2) };
+	        }
+	        return { done: true, value: uncurriedNativeMethod(str, regexp, arg2) };
+	      }
+	      return { done: false };
+	    });
 
-	// `%TypedArray%.prototype.lastIndexOf` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.lastindexof
-	// eslint-disable-next-line no-unused-vars
-	exportTypedArrayMethod$c('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
-	  return arrayLastIndexOf.apply(aTypedArray$c(this), arguments);
-	});
+	    redefine$5(String.prototype, KEY, methods[0]);
+	    redefine$5(RegExpPrototype$2, SYMBOL, methods[1]);
+	  }
 
-	var $map$1 = arrayIteration.map;
+	  if (SHAM) createNonEnumerableProperty$1(RegExpPrototype$2[SYMBOL], 'sham', true);
+	};
 
+	var charAt$4 = stringMultibyte.charAt;
 
-	var aTypedArray$d = arrayBufferViewCore.aTypedArray;
-	var aTypedArrayConstructor$3 = arrayBufferViewCore.aTypedArrayConstructor;
-	var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
+	// `AdvanceStringIndex` abstract operation
+	// https://tc39.es/ecma262/#sec-advancestringindex
+	var advanceStringIndex$3 = function (S, index, unicode) {
+	  return index + (unicode ? charAt$4(S, index).length : 1);
+	};
 
-	// `%TypedArray%.prototype.map` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.map
-	exportTypedArrayMethod$d('map', function map(mapfn /* , thisArg */) {
-	  return $map$1(aTypedArray$d(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
-	    return new (aTypedArrayConstructor$3(speciesConstructor(O, O.constructor)))(length);
-	  });
-	});
+	var uncurryThis$r = functionUncurryThis;
+	var toObject$9 = toObject$i;
 
-	// `Array.prototype.{ reduce, reduceRight }` methods implementation
-	var createMethod$4 = function (IS_RIGHT) {
-	  return function (that, callbackfn, argumentsLength, memo) {
-	    aFunction$1(callbackfn);
-	    var O = toObject(that);
-	    var self = indexedObject(O);
-	    var length = toLength(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;
+	var floor$3 = Math.floor;
+	var charAt$3 = uncurryThis$r(''.charAt);
+	var replace$5 = uncurryThis$r(''.replace);
+	var stringSlice$7 = uncurryThis$r(''.slice);
+	var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
+	var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
+
+	// `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$9(namedCaptures);
+	    symbols = SUBSTITUTION_SYMBOLS;
+	  }
+	  return replace$5(replacement, symbols, function (match, ch) {
+	    var capture;
+	    switch (charAt$3(ch, 0)) {
+	      case '$': return '$';
+	      case '&': return matched;
+	      case '`': return stringSlice$7(str, 0, position);
+	      case "'": return stringSlice$7(str, tailPos);
+	      case '<':
+	        capture = namedCaptures[stringSlice$7(ch, 1, -1)];
 	        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);
+	      default: // \d\d?
+	        var n = +ch;
+	        if (n === 0) return match;
+	        if (n > m) {
+	          var f = floor$3(n / 10);
+	          if (f === 0) return match;
+	          if (f <= m) return captures[f - 1] === undefined ? charAt$3(ch, 1) : captures[f - 1] + charAt$3(ch, 1);
+	          return match;
+	        }
+	        capture = captures[n - 1];
 	    }
-	    return memo;
-	  };
-	};
-
-	var arrayReduce = {
-	  // `Array.prototype.reduce` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.reduce
-	  left: createMethod$4(false),
-	  // `Array.prototype.reduceRight` method
-	  // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright
-	  right: createMethod$4(true)
+	    return capture === undefined ? '' : capture;
+	  });
 	};
 
-	var $reduce = arrayReduce.left;
-
-	var aTypedArray$e = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;
-
-	// `%TypedArray%.prototype.reduce` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduce
-	exportTypedArrayMethod$e('reduce', function reduce(callbackfn /* , initialValue */) {
-	  return $reduce(aTypedArray$e(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	var global$m = global$1o;
+	var call$8 = functionCall;
+	var anObject$7 = anObject$n;
+	var isCallable$4 = isCallable$r;
+	var classof$2 = classofRaw$1;
+	var regexpExec$1 = regexpExec$3;
 
-	var $reduceRight = arrayReduce.right;
+	var TypeError$7 = global$m.TypeError;
 
-	var aTypedArray$f = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;
+	// `RegExpExec` abstract operation
+	// https://tc39.es/ecma262/#sec-regexpexec
+	var regexpExecAbstract = function (R, S) {
+	  var exec = R.exec;
+	  if (isCallable$4(exec)) {
+	    var result = call$8(exec, R, S);
+	    if (result !== null) anObject$7(result);
+	    return result;
+	  }
+	  if (classof$2(R) === 'RegExp') return call$8(regexpExec$1, R, S);
+	  throw TypeError$7('RegExp#exec called on incompatible receiver');
+	};
 
-	// `%TypedArray%.prototype.reduceRicht` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduceright
-	exportTypedArrayMethod$f('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
-	  return $reduceRight(aTypedArray$f(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	var apply$3 = functionApply;
+	var call$7 = functionCall;
+	var uncurryThis$q = functionUncurryThis;
+	var fixRegExpWellKnownSymbolLogic$3 = fixRegexpWellKnownSymbolLogic;
+	var fails$q = fails$V;
+	var anObject$6 = anObject$n;
+	var isCallable$3 = isCallable$r;
+	var toIntegerOrInfinity$3 = toIntegerOrInfinity$b;
+	var toLength$5 = toLength$c;
+	var toString$f = toString$k;
+	var requireObjectCoercible$a = requireObjectCoercible$e;
+	var advanceStringIndex$2 = advanceStringIndex$3;
+	var getMethod$3 = getMethod$7;
+	var getSubstitution = getSubstitution$1;
+	var regExpExec$3 = regexpExecAbstract;
+	var wellKnownSymbol$4 = wellKnownSymbol$t;
+
+	var REPLACE = wellKnownSymbol$4('replace');
+	var max$2 = Math.max;
+	var min$5 = Math.min;
+	var concat$2 = uncurryThis$q([].concat);
+	var push$6 = uncurryThis$q([].push);
+	var stringIndexOf$2 = uncurryThis$q(''.indexOf);
+	var stringSlice$6 = uncurryThis$q(''.slice);
 
-	var aTypedArray$g = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;
-	var floor$3 = Math.floor;
+	var maybeToString = function (it) {
+	  return it === undefined ? it : String(it);
+	};
 
-	// `%TypedArray%.prototype.reverse` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reverse
-	exportTypedArrayMethod$g('reverse', function reverse() {
-	  var that = this;
-	  var length = aTypedArray$g(that).length;
-	  var middle = floor$3(length / 2);
-	  var index = 0;
-	  var value;
-	  while (index < middle) {
-	    value = that[index];
-	    that[index++] = that[--length];
-	    that[length] = value;
-	  } return that;
-	});
+	// 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';
+	})();
 
-	var aTypedArray$h = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;
+	// 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 FORCED$2 = fails(function () {
-	  // eslint-disable-next-line no-undef
-	  new Int8Array(1).set({});
+	var REPLACE_SUPPORTS_NAMED_GROUPS = !fails$q(function () {
+	  var re = /./;
+	  re.exec = function () {
+	    var result = [];
+	    result.groups = { a: '7' };
+	    return result;
+	  };
+	  // eslint-disable-next-line regexp/no-useless-dollar-replacements -- false positive
+	  return ''.replace(re, '$<a>') !== '7';
 	});
 
-	// `%TypedArray%.prototype.set` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.set
-	exportTypedArrayMethod$h('set', function set(arrayLike /* , offset */) {
-	  aTypedArray$h(this);
-	  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
-	  var length = this.length;
-	  var src = toObject(arrayLike);
-	  var len = toLength(src.length);
-	  var index = 0;
-	  if (len + offset > length) throw RangeError('Wrong length');
-	  while (index < len) this[offset + index] = src[index++];
-	}, FORCED$2);
-
-	var aTypedArray$i = arrayBufferViewCore.aTypedArray;
-	var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
-	var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;
-	var $slice = [].slice;
-
-	var FORCED$3 = fails(function () {
-	  // eslint-disable-next-line no-undef
-	  new Int8Array(1).slice();
-	});
+	// @@replace logic
+	fixRegExpWellKnownSymbolLogic$3('replace', function (_, nativeReplace, maybeCallNative) {
+	  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
 
-	// `%TypedArray%.prototype.slice` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.slice
-	exportTypedArrayMethod$i('slice', function slice(start, end) {
-	  var list = $slice.call(aTypedArray$i(this), start, end);
-	  var C = speciesConstructor(this, this.constructor);
-	  var index = 0;
-	  var length = list.length;
-	  var result = new (aTypedArrayConstructor$4(C))(length);
-	  while (length > index) result[index] = list[index++];
-	  return result;
-	}, FORCED$3);
+	  return [
+	    // `String.prototype.replace` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.replace
+	    function replace(searchValue, replaceValue) {
+	      var O = requireObjectCoercible$a(this);
+	      var replacer = searchValue == undefined ? undefined : getMethod$3(searchValue, REPLACE);
+	      return replacer
+	        ? call$7(replacer, searchValue, O, replaceValue)
+	        : call$7(nativeReplace, toString$f(O), searchValue, replaceValue);
+	    },
+	    // `RegExp.prototype[@@replace]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
+	    function (string, replaceValue) {
+	      var rx = anObject$6(this);
+	      var S = toString$f(string);
 
-	var $some = arrayIteration.some;
+	      if (
+	        typeof replaceValue == 'string' &&
+	        stringIndexOf$2(replaceValue, UNSAFE_SUBSTITUTE) === -1 &&
+	        stringIndexOf$2(replaceValue, '$<') === -1
+	      ) {
+	        var res = maybeCallNative(nativeReplace, rx, S, replaceValue);
+	        if (res.done) return res.value;
+	      }
 
-	var aTypedArray$j = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;
+	      var functionalReplace = isCallable$3(replaceValue);
+	      if (!functionalReplace) replaceValue = toString$f(replaceValue);
 
-	// `%TypedArray%.prototype.some` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.some
-	exportTypedArrayMethod$j('some', function some(callbackfn /* , thisArg */) {
-	  return $some(aTypedArray$j(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	});
+	      var global = rx.global;
+	      if (global) {
+	        var fullUnicode = rx.unicode;
+	        rx.lastIndex = 0;
+	      }
+	      var results = [];
+	      while (true) {
+	        var result = regExpExec$3(rx, S);
+	        if (result === null) break;
 
-	var aTypedArray$k = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;
-	var $sort = [].sort;
+	        push$6(results, result);
+	        if (!global) break;
 
-	// `%TypedArray%.prototype.sort` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.sort
-	exportTypedArrayMethod$k('sort', function sort(comparefn) {
-	  return $sort.call(aTypedArray$k(this), comparefn);
-	});
+	        var matchStr = toString$f(result[0]);
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex$2(S, toLength$5(rx.lastIndex), fullUnicode);
+	      }
 
-	var aTypedArray$l = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;
+	      var accumulatedResult = '';
+	      var nextSourcePosition = 0;
+	      for (var i = 0; i < results.length; i++) {
+	        result = results[i];
 
-	// `%TypedArray%.prototype.subarray` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.subarray
-	exportTypedArrayMethod$l('subarray', function subarray(begin, end) {
-	  var O = aTypedArray$l(this);
-	  var length = O.length;
-	  var beginIndex = toAbsoluteIndex(begin, length);
-	  return new (speciesConstructor(O, O.constructor))(
-	    O.buffer,
-	    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
-	    toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)
-	  );
-	});
+	        var matched = toString$f(result[0]);
+	        var position = max$2(min$5(toIntegerOrInfinity$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++) push$6(captures, maybeToString(result[j]));
+	        var namedCaptures = result.groups;
+	        if (functionalReplace) {
+	          var replacerArgs = concat$2([matched], captures, position, S);
+	          if (namedCaptures !== undefined) push$6(replacerArgs, namedCaptures);
+	          var replacement = toString$f(apply$3(replaceValue, undefined, replacerArgs));
+	        } else {
+	          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
+	        }
+	        if (position >= nextSourcePosition) {
+	          accumulatedResult += stringSlice$6(S, nextSourcePosition, position) + replacement;
+	          nextSourcePosition = position + matched.length;
+	        }
+	      }
+	      return accumulatedResult + stringSlice$6(S, nextSourcePosition);
+	    }
+	  ];
+	}, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
 
-	var Int8Array$3 = global_1.Int8Array;
-	var aTypedArray$m = arrayBufferViewCore.aTypedArray;
-	var exportTypedArrayMethod$m = arrayBufferViewCore.exportTypedArrayMethod;
-	var $toLocaleString = [].toLocaleString;
-	var $slice$1 = [].slice;
+	var isObject$c = isObject$s;
+	var classof$1 = classofRaw$1;
+	var wellKnownSymbol$3 = wellKnownSymbol$t;
 
-	// iOS Safari 6.x fails here
-	var TO_LOCALE_STRING_BUG = !!Int8Array$3 && fails(function () {
-	  $toLocaleString.call(new Int8Array$3(1));
-	});
+	var MATCH$2 = wellKnownSymbol$3('match');
+
+	// `IsRegExp` abstract operation
+	// https://tc39.es/ecma262/#sec-isregexp
+	var isRegexp = function (it) {
+	  var isRegExp;
+	  return isObject$c(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classof$1(it) == 'RegExp');
+	};
+
+	var apply$2 = functionApply;
+	var call$6 = functionCall;
+	var uncurryThis$p = functionUncurryThis;
+	var fixRegExpWellKnownSymbolLogic$2 = fixRegexpWellKnownSymbolLogic;
+	var isRegExp$2 = isRegexp;
+	var anObject$5 = anObject$n;
+	var requireObjectCoercible$9 = requireObjectCoercible$e;
+	var speciesConstructor$1 = speciesConstructor$5;
+	var advanceStringIndex$1 = advanceStringIndex$3;
+	var toLength$4 = toLength$c;
+	var toString$e = toString$k;
+	var getMethod$2 = getMethod$7;
+	var arraySlice$4 = arraySliceSimple;
+	var callRegExpExec = regexpExecAbstract;
+	var regexpExec = regexpExec$3;
+	var stickyHelpers$1 = regexpStickyHelpers;
+	var fails$p = fails$V;
+
+	var UNSUPPORTED_Y$1 = stickyHelpers$1.UNSUPPORTED_Y;
+	var MAX_UINT32 = 0xFFFFFFFF;
+	var min$4 = Math.min;
+	var $push = [].push;
+	var exec$4 = uncurryThis$p(/./.exec);
+	var push$5 = uncurryThis$p($push);
+	var stringSlice$5 = uncurryThis$p(''.slice);
 
-	var FORCED$4 = fails(function () {
-	  return [1, 2].toLocaleString() != new Int8Array$3([1, 2]).toLocaleString();
-	}) || !fails(function () {
-	  Int8Array$3.prototype.toLocaleString.call([1, 2]);
+	// Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+	// Weex JS has frozen built-in prototypes, so use try / catch wrapper
+	var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails$p(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';
 	});
 
-	// `%TypedArray%.prototype.toLocaleString` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tolocalestring
-	exportTypedArrayMethod$m('toLocaleString', function toLocaleString() {
-	  return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice$1.call(aTypedArray$m(this)) : aTypedArray$m(this), arguments);
-	}, FORCED$4);
+	// @@split logic
+	fixRegExpWellKnownSymbolLogic$2('split', function (SPLIT, nativeSplit, maybeCallNative) {
+	  var internalSplit;
+	  if (
+	    'abbc'.split(/(b)*/)[1] == 'c' ||
+	    // eslint-disable-next-line regexp/no-empty-group -- required for testing
+	    'test'.split(/(?:)/, -1).length != 4 ||
+	    'ab'.split(/(?:ab)*/).length != 2 ||
+	    '.'.split(/(.?)(.?)/).length != 4 ||
+	    // eslint-disable-next-line regexp/no-empty-capturing-group, regexp/no-empty-group -- required for testing
+	    '.'.split(/()()/).length > 1 ||
+	    ''.split(/.?/).length
+	  ) {
+	    // based on es5-shim implementation, need to rework it
+	    internalSplit = function (separator, limit) {
+	      var string = toString$e(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 call$6(nativeSplit, 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 = call$6(regexpExec, separatorCopy, string)) {
+	        lastIndex = separatorCopy.lastIndex;
+	        if (lastIndex > lastLastIndex) {
+	          push$5(output, stringSlice$5(string, lastLastIndex, match.index));
+	          if (match.length > 1 && match.index < string.length) apply$2($push, output, arraySlice$4(match, 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 || !exec$4(separatorCopy, '')) push$5(output, '');
+	      } else push$5(output, stringSlice$5(string, lastLastIndex));
+	      return output.length > lim ? arraySlice$4(output, 0, lim) : output;
+	    };
+	  // Chakra, V8
+	  } else if ('0'.split(undefined, 0).length) {
+	    internalSplit = function (separator, limit) {
+	      return separator === undefined && limit === 0 ? [] : call$6(nativeSplit, this, separator, limit);
+	    };
+	  } else internalSplit = nativeSplit;
 
-	var exportTypedArrayMethod$n = arrayBufferViewCore.exportTypedArrayMethod;
+	  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 : getMethod$2(separator, SPLIT);
+	      return splitter
+	        ? call$6(splitter, separator, O, limit)
+	        : call$6(internalSplit, toString$e(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 rx = anObject$5(this);
+	      var S = toString$e(string);
+	      var res = maybeCallNative(internalSplit, rx, S, limit, internalSplit !== nativeSplit);
 
+	      if (res.done) return res.value;
 
+	      var C = speciesConstructor$1(rx, RegExp);
 
-	var Uint8Array$2 = global_1.Uint8Array;
-	var Uint8ArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype || {};
-	var arrayToString = [].toString;
-	var arrayJoin = [].join;
+	      var unicodeMatching = rx.unicode;
+	      var flags = (rx.ignoreCase ? 'i' : '') +
+	                  (rx.multiline ? 'm' : '') +
+	                  (rx.unicode ? 'u' : '') +
+	                  (UNSUPPORTED_Y$1 ? 'g' : 'y');
 
-	if (fails(function () { arrayToString.call({}); })) {
-	  arrayToString = function toString() {
-	    return arrayJoin.call(this);
+	      // ^(? + 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 ? stringSlice$5(S, q) : S);
+	        var e;
+	        if (
+	          z === null ||
+	          (e = min$4(toLength$4(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), S.length)) === p
+	        ) {
+	          q = advanceStringIndex$1(S, q, unicodeMatching);
+	        } else {
+	          push$5(A, stringSlice$5(S, p, q));
+	          if (A.length === lim) return A;
+	          for (var i = 1; i <= z.length - 1; i++) {
+	            push$5(A, z[i]);
+	            if (A.length === lim) return A;
+	          }
+	          q = p = e;
+	        }
+	      }
+	      push$5(A, stringSlice$5(S, p));
+	      return A;
+	    }
+	  ];
+	}, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);
+
+	// a string of all valid unicode whitespaces
+	var whitespaces$4 = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002' +
+	  '\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
+
+	var uncurryThis$o = functionUncurryThis;
+	var requireObjectCoercible$8 = requireObjectCoercible$e;
+	var toString$d = toString$k;
+	var whitespaces$3 = whitespaces$4;
+
+	var replace$4 = uncurryThis$o(''.replace);
+	var whitespace = '[' + whitespaces$3 + ']';
+	var ltrim = RegExp('^' + whitespace + whitespace + '*');
+	var rtrim$2 = RegExp(whitespace + whitespace + '*$');
+
+	// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
+	var createMethod$2 = function (TYPE) {
+	  return function ($this) {
+	    var string = toString$d(requireObjectCoercible$8($this));
+	    if (TYPE & 1) string = replace$4(string, ltrim, '');
+	    if (TYPE & 2) string = replace$4(string, rtrim$2, '');
+	    return string;
 	  };
-	}
+	};
 
-	var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
+	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)
+	};
 
-	// `%TypedArray%.prototype.toString` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tostring
-	exportTypedArrayMethod$n('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+	var PROPER_FUNCTION_NAME = functionName.PROPER;
+	var fails$o = fails$V;
+	var whitespaces$2 = whitespaces$4;
 
-	// 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 non = '\u200B\u0085\u180E';
+
+	// check that a method works with the correct list
+	// of whitespaces and has a correct name
+	var stringTrimForced = function (METHOD_NAME) {
+	  return fails$o(function () {
+	    return !!whitespaces$2[METHOD_NAME]()
+	      || non[METHOD_NAME]() !== non
+	      || (PROPER_FUNCTION_NAME && whitespaces$2[METHOD_NAME].name !== METHOD_NAME);
+	  });
 	};
 
-	for (var COLLECTION_NAME in domIterables) {
-	  var Collection = global_1[COLLECTION_NAME];
-	  var CollectionPrototype = Collection && Collection.prototype;
-	  // some Chrome versions have non-configurable methods on DOMTokenList
-	  if (CollectionPrototype && CollectionPrototype.forEach !== arrayForEach) try {
-	    createNonEnumerableProperty(CollectionPrototype, 'forEach', arrayForEach);
-	  } catch (error) {
-	    CollectionPrototype.forEach = arrayForEach;
+	var $$W = _export;
+	var $trim = stringTrim.trim;
+	var forcedStringTrimMethod$2 = stringTrimForced;
+
+	// `String.prototype.trim` method
+	// https://tc39.es/ecma262/#sec-string.prototype.trim
+	$$W({ target: 'String', proto: true, forced: forcedStringTrimMethod$2('trim') }, {
+	  trim: function trim() {
+	    return $trim(this);
 	  }
-	}
+	});
 
-	var ITERATOR$6 = wellKnownSymbol('iterator');
-	var TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');
-	var ArrayValues = es_array_iterator.values;
+	var DESCRIPTORS$b = descriptors;
+	var FUNCTION_NAME_EXISTS = functionName.EXISTS;
+	var uncurryThis$n = functionUncurryThis;
+	var defineProperty$6 = objectDefineProperty.f;
 
-	for (var COLLECTION_NAME$1 in domIterables) {
-	  var Collection$1 = global_1[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(CollectionPrototype$1, ITERATOR$6, ArrayValues);
-	    } catch (error) {
-	      CollectionPrototype$1[ITERATOR$6] = ArrayValues;
-	    }
-	    if (!CollectionPrototype$1[TO_STRING_TAG$4]) {
-	      createNonEnumerableProperty(CollectionPrototype$1, TO_STRING_TAG$4, COLLECTION_NAME$1);
-	    }
-	    if (domIterables[COLLECTION_NAME$1]) for (var METHOD_NAME in es_array_iterator) {
-	      // some Chrome versions have non-configurable methods on DOMTokenList
-	      if (CollectionPrototype$1[METHOD_NAME] !== es_array_iterator[METHOD_NAME]) try {
-	        createNonEnumerableProperty(CollectionPrototype$1, METHOD_NAME, es_array_iterator[METHOD_NAME]);
+	var FunctionPrototype = Function.prototype;
+	var functionToString = uncurryThis$n(FunctionPrototype.toString);
+	var nameRE = /function\b(?:\s|\/\*[\S\s]*?\*\/|\/\/[^\n\r]*[\n\r]+)*([^\s(/]*)/;
+	var regExpExec$2 = uncurryThis$n(nameRE.exec);
+	var NAME = 'name';
+
+	// Function instances `.name` property
+	// https://tc39.es/ecma262/#sec-function-instances-name
+	if (DESCRIPTORS$b && !FUNCTION_NAME_EXISTS) {
+	  defineProperty$6(FunctionPrototype, NAME, {
+	    configurable: true,
+	    get: function () {
+	      try {
+	        return regExpExec$2(nameRE, functionToString(this))[1];
 	      } catch (error) {
-	        CollectionPrototype$1[METHOD_NAME] = es_array_iterator[METHOD_NAME];
+	        return '';
 	      }
 	    }
-	  }
+	  });
 	}
 
-	var slice = [].slice;
-	var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check
+	var $$V = _export;
+	var DESCRIPTORS$a = descriptors;
+	var create$5 = objectCreate;
+
+	// `Object.create` method
+	// https://tc39.es/ecma262/#sec-object.create
+	$$V({ target: 'Object', stat: true, sham: !DESCRIPTORS$a }, {
+	  create: create$5
+	});
+
+	var $$U = _export;
+	var global$l = global$1o;
+	var apply$1 = functionApply;
+	var isCallable$2 = isCallable$r;
+	var userAgent$1 = engineUserAgent;
+	var arraySlice$3 = arraySlice$b;
+	var validateArgumentsLength$1 = validateArgumentsLength$4;
+
+	var MSIE = /MSIE .\./.test(userAgent$1); // <- dirty ie9- check
+	var Function$2 = global$l.Function;
 
 	var wrap$1 = function (scheduler) {
 	  return function (handler, timeout /* , ...arguments */) {
-	    var boundArgs = arguments.length > 2;
-	    var args = boundArgs ? slice.call(arguments, 2) : undefined;
+	    var boundArgs = validateArgumentsLength$1(arguments.length, 1) > 2;
+	    var fn = isCallable$2(handler) ? handler : Function$2(handler);
+	    var args = boundArgs ? arraySlice$3(arguments, 2) : undefined;
 	    return scheduler(boundArgs ? function () {
-	      // eslint-disable-next-line no-new-func
-	      (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
-	    } : handler, timeout);
+	      apply$1(fn, this, args);
+	    } : fn, timeout);
 	  };
 	};
 
 	// ie9- setTimeout & setInterval additional parameters fix
 	// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
-	_export({ global: true, bind: true, forced: MSIE }, {
+	$$U({ 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_1.setTimeout),
+	  setTimeout: wrap$1(global$l.setTimeout),
 	  // `setInterval` method
 	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
-	  setInterval: wrap$1(global_1.setInterval)
-	});
-
-	var ITERATOR$7 = wellKnownSymbol('iterator');
-
-	var nativeUrl = !fails(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 (isPure && !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$7]
-	    // 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';
+	  setInterval: wrap$1(global$l.setInterval)
 	});
 
-	var nativeAssign = Object.assign;
-	var defineProperty$7 = Object.defineProperty;
-
-	// `Object.assign` method
-	// https://tc39.github.io/ecma262/#sec-object.assign
-	var objectAssign = !nativeAssign || fails(function () {
-	  // should have correct order of operations (Edge bug)
-	  if (descriptors && nativeAssign({ b: 1 }, nativeAssign(defineProperty$7({}, 'a', {
-	    enumerable: true,
-	    get: function () {
-	      defineProperty$7(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 no-undef
-	  var symbol = Symbol();
-	  var alphabet = 'abcdefghijklmnopqrst';
-	  A[symbol] = 7;
-	  alphabet.split('').forEach(function (chr) { B[chr] = chr; });
-	  return nativeAssign({}, A)[symbol] != 7 || objectKeys(nativeAssign({}, B)).join('') != alphabet;
-	}) ? function assign(target, source) { // eslint-disable-line no-unused-vars
-	  var T = toObject(target);
-	  var argumentsLength = arguments.length;
-	  var index = 1;
-	  var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
-	  var propertyIsEnumerable = objectPropertyIsEnumerable.f;
-	  while (argumentsLength > index) {
-	    var S = indexedObject(arguments[index++]);
-	    var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);
-	    var length = keys.length;
-	    var j = 0;
-	    var key;
-	    while (length > j) {
-	      key = keys[j++];
-	      if (!descriptors || propertyIsEnumerable.call(S, key)) T[key] = S[key];
-	    }
-	  } return T;
-	} : nativeAssign;
-
-	// `Array.from` method implementation
-	// https://tc39.github.io/ecma262/#sec-array.from
-	var arrayFrom = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
-	  var O = toObject(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(O);
-	  var index = 0;
-	  var length, result, step, iterator, next, value;
-	  if (mapping) mapfn = functionBindContext(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(result, index, value);
-	    }
-	  } else {
-	    length = toLength(O.length);
-	    result = new C(length);
-	    for (;length > index; index++) {
-	      value = mapping ? mapfn(O[index], index) : O[index];
-	      createProperty(result, index, value);
+	var global$k = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$k !== 'undefined' && global$k;
+	var support = {
+	  searchParams: 'URLSearchParams' in global$k,
+	  iterable: 'Symbol' in global$k && 'iterator' in Symbol,
+	  blob: 'FileReader' in global$k && 'Blob' in global$k && function () {
+	    try {
+	      new Blob();
+	      return true;
+	    } catch (e) {
+	      return false;
 	    }
-	  }
-	  result.length = index;
-	  return result;
+	  }(),
+	  formData: 'FormData' in global$k,
+	  arrayBuffer: 'ArrayBuffer' in global$k
 	};
 
-	// 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$4 = Math.floor;
-	var stringFromCharCode = String.fromCharCode;
+	function isDataView(obj) {
+	  return obj && DataView.prototype.isPrototypeOf(obj);
+	}
 
-	/**
-	 * 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);
-	    }
-	  }
-	  return output;
-	};
+	if (support.arrayBuffer) {
+	  var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
 
-	/**
-	 * 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 isArrayBufferView = ArrayBuffer.isView || function (obj) {
+	    return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+	  };
+	}
 
-	/**
-	 * 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$4(delta / damp) : delta >> 1;
-	  delta += floor$4(delta / numPoints);
-	  for (; delta > baseMinusTMin * tMax >> 1; k += base) {
-	    delta = floor$4(delta / baseMinusTMin);
+	function normalizeName(name) {
+	  if (typeof name !== 'string') {
+	    name = String(name);
 	  }
-	  return floor$4(k + (baseMinusTMin + 1) * delta / (delta + skew));
-	};
-
-	/**
-	 * 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
-	var encode = function (input) {
-	  var output = [];
-
-	  // Convert the input in UCS-2 to an array of Unicode code points.
-	  input = ucs2decode(input);
-
-	  // Cache the length.
-	  var inputLength = input.length;
-
-	  // Initialize the state.
-	  var n = initialN;
-	  var delta = 0;
-	  var bias = initialBias;
-	  var i, currentValue;
 
-	  // Handle the basic code points.
-	  for (i = 0; i < input.length; i++) {
-	    currentValue = input[i];
-	    if (currentValue < 0x80) {
-	      output.push(stringFromCharCode(currentValue));
-	    }
+	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+	    throw new TypeError('Invalid character in header field name: "' + name + '"');
 	  }
 
-	  var basicLength = output.length; // number of basic code points.
-	  var handledCPCount = basicLength; // number of code points that have been handled;
+	  return name.toLowerCase();
+	}
 
-	  // Finish the basic string with a delimiter unless it's empty.
-	  if (basicLength) {
-	    output.push(delimiter);
+	function normalizeValue(value) {
+	  if (typeof value !== 'string') {
+	    value = String(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;
-	      }
-	    }
+	  return value;
+	} // Build a destructive iterator for the value list
 
-	    // 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$4((maxInt - delta) / handledCPCountPlusOne)) {
-	      throw RangeError(OVERFLOW_ERROR);
+
+	function iteratorFor(items) {
+	  var iterator = {
+	    next: function next() {
+	      var value = items.shift();
+	      return {
+	        done: value === undefined,
+	        value: value
+	      };
 	    }
+	  };
 
-	    delta += (m - n) * handledCPCountPlusOne;
-	    n = m;
+	  if (support.iterable) {
+	    iterator[Symbol.iterator] = function () {
+	      return iterator;
+	    };
+	  }
 
-	    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$4(qMinusT / baseMinusT);
-	        }
+	  return iterator;
+	}
 
-	        output.push(stringFromCharCode(digitToBasic(q)));
-	        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
-	        delta = 0;
-	        ++handledCPCount;
-	      }
-	    }
+	function Headers(headers) {
+	  this.map = {};
 
-	    ++delta;
-	    ++n;
+	  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);
 	  }
-	  return output.join('');
+	}
+
+	Headers.prototype.append = function (name, value) {
+	  name = normalizeName(name);
+	  value = normalizeValue(value);
+	  var oldValue = this.map[name];
+	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
 	};
 
-	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('.');
+	Headers.prototype['delete'] = function (name) {
+	  delete this.map[normalizeName(name)];
 	};
 
-	var getIterator = function (it) {
-	  var iteratorMethod = getIteratorMethod(it);
-	  if (typeof iteratorMethod != 'function') {
-	    throw TypeError(String(it) + ' is not iterable');
-	  } return anObject(iteratorMethod.call(it));
+	Headers.prototype.get = function (name) {
+	  name = normalizeName(name);
+	  return this.has(name) ? this.map[name] : null;
 	};
 
-	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+	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);
+	    }
+	  }
+	};
 
+	Headers.prototype.keys = function () {
+	  var items = [];
+	  this.forEach(function (value, name) {
+	    items.push(name);
+	  });
+	  return iteratorFor(items);
+	};
 
+	Headers.prototype.values = function () {
+	  var items = [];
+	  this.forEach(function (value) {
+	    items.push(value);
+	  });
+	  return iteratorFor(items);
+	};
 
+	Headers.prototype.entries = function () {
+	  var items = [];
+	  this.forEach(function (value, name) {
+	    items.push([name, value]);
+	  });
+	  return iteratorFor(items);
+	};
 
+	if (support.iterable) {
+	  Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+	}
 
+	function consumed(body) {
+	  if (body.bodyUsed) {
+	    return Promise.reject(new TypeError('Already read'));
+	  }
 
+	  body.bodyUsed = true;
+	}
 
+	function fileReaderReady(reader) {
+	  return new Promise(function (resolve, reject) {
+	    reader.onload = function () {
+	      resolve(reader.result);
+	    };
 
+	    reader.onerror = function () {
+	      reject(reader.error);
+	    };
+	  });
+	}
 
+	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;
+	}
 
+	function readArrayBufferAsText(buf) {
+	  var view = new Uint8Array(buf);
+	  var chars = new Array(view.length);
 
+	  for (var i = 0; i < view.length; i++) {
+	    chars[i] = String.fromCharCode(view[i]);
+	  }
 
+	  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 Body() {
+	  this.bodyUsed = false;
 
+	  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 $fetch$1 = getBuiltIn('fetch');
-	var Headers = getBuiltIn('Headers');
-	var ITERATOR$8 = wellKnownSymbol('iterator');
-	var URL_SEARCH_PARAMS = 'URLSearchParams';
-	var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
-	var setInternalState$5 = internalState.set;
-	var getInternalParamsState = internalState.getterFor(URL_SEARCH_PARAMS);
-	var getInternalIteratorState = internalState.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+	    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 plus = /\+/g;
-	var sequences = Array(4);
+	  if (support.blob) {
+	    this.blob = function () {
+	      var rejected = consumed(this);
 
-	var percentSequence = function (bytes) {
-	  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
-	};
+	      if (rejected) {
+	        return rejected;
+	      }
 
-	var percentDecode = function (sequence) {
-	  try {
-	    return decodeURIComponent(sequence);
-	  } catch (error) {
-	    return sequence;
-	  }
-	};
+	      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 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;
-	  }
-	};
+	    this.arrayBuffer = function () {
+	      if (this._bodyArrayBuffer) {
+	        var isConsumed = consumed(this);
 
-	var find = /[!'()~]|%20/g;
+	        if (isConsumed) {
+	          return isConsumed;
+	        }
 
-	var replace = {
-	  '!': '%21',
-	  "'": '%27',
-	  '(': '%28',
-	  ')': '%29',
-	  '~': '%7E',
-	  '%20': '+'
-	};
+	        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);
+	      }
+	    };
+	  }
 
-	var replacer = function (match) {
-	  return replace[match];
-	};
+	  this.text = function () {
+	    var rejected = consumed(this);
 
-	var serialize = function (it) {
-	  return encodeURIComponent(it).replace(find, replacer);
-	};
+	    if (rejected) {
+	      return rejected;
+	    }
 
-	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('='))
-	        });
-	      }
+	    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);
 	    }
+	  };
+
+	  if (support.formData) {
+	    this.formData = function () {
+	      return this.text().then(decode);
+	    };
 	  }
-	};
 
-	var updateSearchParams = function (query) {
-	  this.entries.length = 0;
-	  parseSearchParams(this.entries, query);
-	};
+	  this.json = function () {
+	    return this.text().then(JSON.parse);
+	  };
 
-	var validateArgumentsLength = function (passed, required) {
-	  if (passed < required) throw TypeError('Not enough arguments');
-	};
+	  return this;
+	} // HTTP methods whose capitalization should be normalized
 
-	var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
-	  setInternalState$5(this, {
-	    type: URL_SEARCH_PARAMS_ITERATOR,
-	    iterator: getIterator(getInternalParamsState(params).entries),
-	    kind: kind
-	  });
-	}, '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(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$5(that, {
-	    type: URL_SEARCH_PARAMS,
-	    entries: entries,
-	    updateURL: function () { /* empty */ },
-	    updateSearchParams: updateSearchParams
-	  });
+	var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
 
-	  if (init !== undefined) {
-	    if (isObject(init)) {
-	      iteratorMethod = getIteratorMethod(init);
-	      if (typeof iteratorMethod === 'function') {
-	        iterator = iteratorMethod.call(init);
-	        next = iterator.next;
-	        while (!(step = next.call(iterator)).done) {
-	          entryIterator = getIterator(anObject(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 (has(init, key)) entries.push({ key: key, value: init[key] + '' });
-	    } else {
-	      parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
-	    }
+	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.');
 	  }
-	};
 
-	var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
+	  options = options || {};
+	  var body = options.body;
 
-	redefineAll(URLSearchParamsPrototype, {
-	  // `URLSearchParams.prototype.appent` 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 (input instanceof Request) {
+	    if (input.bodyUsed) {
+	      throw new TypeError('Already read');
 	    }
-	    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);
+
+	    this.url = input.url;
+	    this.credentials = input.credentials;
+
+	    if (!options.headers) {
+	      this.headers = new Headers(input.headers);
 	    }
-	    state.updateURL();
-	  },
-	  // `URLSearchParams.prototype.forEach` method
-	  forEach: function forEach(callback /* , thisArg */) {
-	    var entries = getInternalParamsState(this).entries;
-	    var boundFunction = functionBindContext(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);
+
+	    this.method = input.method;
+	    this.mode = input.mode;
+	    this.signal = input.signal;
+
+	    if (!body && input._bodyInit != null) {
+	      body = input._bodyInit;
+	      input.bodyUsed = true;
 	    }
-	  },
-	  // `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');
+	  } else {
+	    this.url = String(input);
 	  }
-	}, { enumerable: true });
 
-	// `URLSearchParams.prototype[@@iterator]` method
-	redefine(URLSearchParamsPrototype, ITERATOR$8, URLSearchParamsPrototype.entries);
+	  this.credentials = options.credentials || this.credentials || 'same-origin';
 
-	// `URLSearchParams.prototype.toString` method
-	// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
-	redefine(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 });
+	  if (options.headers || !this.headers) {
+	    this.headers = new Headers(options.headers);
+	  }
 
-	setToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+	  this.method = normalizeMethod(options.method || this.method || 'GET');
+	  this.mode = options.mode || this.mode || null;
+	  this.signal = options.signal || this.signal;
+	  this.referrer = null;
 
-	_export({ global: true, forced: !nativeUrl }, {
-	  URLSearchParams: URLSearchParamsConstructor
-	});
+	  if ((this.method === 'GET' || this.method === 'HEAD') && body) {
+	    throw new TypeError('Body not allowed for GET or HEAD requests');
+	  }
 
-	// Wrap `fetch` for correct work with polyfilled `URLSearchParams`
-	// https://github.com/zloirock/core-js/issues/674
-	if (!nativeUrl && typeof $fetch$1 == 'function' && typeof Headers == 'function') {
-	  _export({ 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(init)) {
-	          body = init.body;
-	          if (classof(body) === URL_SEARCH_PARAMS) {
-	            headers = init.headers ? new Headers(init.headers) : new Headers();
-	            if (!headers.has('content-type')) {
-	              headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
-	            }
-	            init = objectCreate(init, {
-	              body: createPropertyDescriptor(0, String(body)),
-	              headers: createPropertyDescriptor(0, headers)
-	            });
-	          }
-	        }
-	        args.push(init);
-	      } return $fetch$1.apply(this, args);
+	  this._initBody(body);
+
+	  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();
+	      }
 	    }
-	  });
+	  }
 	}
 
-	var web_urlSearchParams = {
-	  URLSearchParams: URLSearchParamsConstructor,
-	  getState: getInternalParamsState
+	Request.prototype.clone = function () {
+	  return new Request(this, {
+	    body: this._bodyInit
+	  });
 	};
 
-	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
-
+	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;
+	}
 
+	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, ' '); // 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
 
+	  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();
 
+	    if (key) {
+	      var value = parts.join(':').trim();
+	      headers.append(key, value);
+	    }
+	  });
+	  return headers;
+	}
 
+	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.');
+	  }
 
+	  if (!options) {
+	    options = {};
+	  }
 
+	  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 || '';
 
+	  this._initBody(bodyInit);
+	}
+	Body.call(Response.prototype);
 
+	Response.prototype.clone = function () {
+	  return new Response(this._bodyInit, {
+	    status: this.status,
+	    statusText: this.statusText,
+	    headers: new Headers(this.headers),
+	    url: this.url
+	  });
+	};
 
-	var codeAt = stringMultibyte.codeAt;
+	Response.error = function () {
+	  var response = new Response(null, {
+	    status: 0,
+	    statusText: ''
+	  });
+	  response.type = 'error';
+	  return response;
+	};
 
+	var redirectStatuses = [301, 302, 303, 307, 308];
 
+	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 DOMException$1 = global$k.DOMException;
 
-	var NativeURL = global_1.URL;
-	var URLSearchParams$1 = web_urlSearchParams.URLSearchParams;
-	var getInternalSearchParamsState = web_urlSearchParams.getState;
-	var setInternalState$6 = internalState.set;
-	var getInternalURLState = internalState.getterFor('URL');
-	var floor$5 = Math.floor;
-	var pow$1 = Math.pow;
+	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 INVALID_AUTHORITY = 'Invalid authority';
-	var INVALID_SCHEME = 'Invalid scheme';
-	var INVALID_HOST = 'Invalid host';
-	var INVALID_PORT = 'Invalid port';
+	  DOMException$1.prototype = Object.create(Error.prototype);
+	  DOMException$1.prototype.constructor = DOMException$1;
+	}
 
-	var ALPHA = /[A-Za-z]/;
-	var ALPHANUMERIC = /[\d+-.A-Za-z]/;
-	var DIGIT = /\d/;
-	var HEX_START = /^(0x|0X)/;
-	var OCT = /^[0-7]+$/;
-	var DEC = /^\d+$/;
-	var HEX = /^[\dA-Fa-f]+$/;
-	// eslint-disable-next-line no-control-regex
-	var FORBIDDEN_HOST_CODE_POINT = /[\u0000\u0009\u000A\u000D #%/:?@[\\]]/;
-	// eslint-disable-next-line no-control-regex
-	var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\u0000\u0009\u000A\u000D #/:?@[\\]]/;
-	// eslint-disable-next-line no-control-regex
-	var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
-	// eslint-disable-next-line no-control-regex
-	var TAB_AND_NEW_LINE = /[\u0009\u000A\u000D]/g;
-	var EOF;
+	function fetch$1(input, init) {
+	  return new Promise(function (resolve, reject) {
+	    var request = new Request(input, init);
 
-	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);
+	    if (request.signal && request.signal.aborted) {
+	      return reject(new DOMException$1('Aborted', 'AbortError'));
 	    }
-	    url.host = result;
-	  } else {
-	    input = stringPunycodeToAscii(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);
+	    var xhr = new XMLHttpRequest();
+
+	    function abortXhr() {
+	      xhr.abort();
 	    }
-	    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
-	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;
+	    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);
+	    };
 
-	  var char = function () {
-	    return input.charAt(pointer);
-	  };
+	    xhr.onerror = function () {
+	      setTimeout(function () {
+	        reject(new TypeError('Network request failed'));
+	      }, 0);
+	    };
 
-	  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;
+	    xhr.ontimeout = function () {
+	      setTimeout(function () {
+	        reject(new TypeError('Network request failed'));
+	      }, 0);
+	    };
+
+	    xhr.onabort = function () {
+	      setTimeout(function () {
+	        reject(new DOMException$1('Aborted', 'AbortError'));
+	      }, 0);
+	    };
+
+	    function fixUrl(url) {
+	      try {
+	        return url === '' && global$k.location.href ? global$k.location.href : url;
+	      } catch (e) {
+	        return url;
+	      }
 	    }
-	    value = length = 0;
-	    while (length < 4 && HEX.test(char())) {
-	      value = value * 16 + parseInt(char(), 16);
-	      pointer++;
-	      length++;
+
+	    xhr.open(request.method, fixUrl(request.url), true);
+
+	    if (request.credentials === 'include') {
+	      xhr.withCredentials = true;
+	    } else if (request.credentials === 'omit') {
+	      xhr.withCredentials = false;
 	    }
-	    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 ('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';
 	      }
-	      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;
+	    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 {
-	      if (currStart === null) currStart = index;
-	      ++currLength;
+	      request.headers.forEach(function (value, name) {
+	        xhr.setRequestHeader(name, value);
+	      });
 	    }
-	  }
-	  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$5(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 += ':';
-	      }
+	    if (request.signal) {
+	      request.signal.addEventListener('abort', abortXhr);
+
+	      xhr.onreadystatechange = function () {
+	        // DONE (success or failure)
+	        if (xhr.readyState === 4) {
+	          request.signal.removeEventListener('abort', abortXhr);
+	        }
+	      };
 	    }
-	    return '[' + result + ']';
-	  } return host;
-	};
 
-	var C0ControlPercentEncodeSet = {};
-	var fragmentPercentEncodeSet = objectAssign({}, C0ControlPercentEncodeSet, {
-	  ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+	    xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
+	  });
+	}
+	fetch$1.polyfill = true;
+
+	if (!global$k.fetch) {
+	  global$k.fetch = fetch$1;
+	  global$k.Headers = Headers;
+	  global$k.Request = Request;
+	  global$k.Response = Response;
+	}
+
+	var $$T = _export;
+	var DESCRIPTORS$9 = descriptors;
+	var defineProperty$5 = objectDefineProperty.f;
+
+	// `Object.defineProperty` method
+	// https://tc39.es/ecma262/#sec-object.defineproperty
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	$$T({ target: 'Object', stat: true, forced: Object.defineProperty !== defineProperty$5, sham: !DESCRIPTORS$9 }, {
+	  defineProperty: defineProperty$5
 	});
-	var pathPercentEncodeSet = objectAssign({}, fragmentPercentEncodeSet, {
-	  '#': 1, '?': 1, '{': 1, '}': 1
+
+	var $$S = _export;
+	var setPrototypeOf = objectSetPrototypeOf;
+
+	// `Object.setPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.setprototypeof
+	$$S({ target: 'Object', stat: true }, {
+	  setPrototypeOf: setPrototypeOf
 	});
-	var userinfoPercentEncodeSet = objectAssign({}, pathPercentEncodeSet, {
-	  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+
+	var $$R = _export;
+	var fails$n = fails$V;
+	var toObject$8 = toObject$i;
+	var nativeGetPrototypeOf = objectGetPrototypeOf;
+	var CORRECT_PROTOTYPE_GETTER = correctPrototypeGetter;
+
+	var FAILS_ON_PRIMITIVES$4 = fails$n(function () { nativeGetPrototypeOf(1); });
+
+	// `Object.getPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.getprototypeof
+	$$R({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !CORRECT_PROTOTYPE_GETTER }, {
+	  getPrototypeOf: function getPrototypeOf(it) {
+	    return nativeGetPrototypeOf(toObject$8(it));
+	  }
 	});
 
-	var percentEncode = function (char, set) {
-	  var code = codeAt(char, 0);
-	  return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);
-	};
+	var global$j = global$1o;
+	var uncurryThis$m = functionUncurryThis;
+	var aCallable$2 = aCallable$a;
+	var isObject$b = isObject$s;
+	var hasOwn$5 = hasOwnProperty_1;
+	var arraySlice$2 = arraySlice$b;
+	var NATIVE_BIND = functionBindNative;
+
+	var Function$1 = global$j.Function;
+	var concat$1 = uncurryThis$m([].concat);
+	var join$3 = uncurryThis$m([].join);
+	var factories = {};
 
-	var specialSchemes = {
-	  ftp: 21,
-	  file: null,
-	  http: 80,
-	  https: 443,
-	  ws: 80,
-	  wss: 443
+	var construct = function (C, argsLength, args) {
+	  if (!hasOwn$5(factories, argsLength)) {
+	    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
+	    factories[argsLength] = Function$1('C,a', 'return new C(' + join$3(list, ',') + ')');
+	  } return factories[argsLength](C, args);
 	};
 
-	var isSpecial = function (url) {
-	  return has(specialSchemes, url.scheme);
+	// `Function.prototype.bind` method implementation
+	// https://tc39.es/ecma262/#sec-function.prototype.bind
+	var functionBind = NATIVE_BIND ? Function$1.bind : function bind(that /* , ...args */) {
+	  var F = aCallable$2(this);
+	  var Prototype = F.prototype;
+	  var partArgs = arraySlice$2(arguments, 1);
+	  var boundFunction = function bound(/* args... */) {
+	    var args = concat$1(partArgs, arraySlice$2(arguments));
+	    return this instanceof boundFunction ? construct(F, args.length, args) : F.apply(that, args);
+	  };
+	  if (isObject$b(Prototype)) boundFunction.prototype = Prototype;
+	  return boundFunction;
 	};
 
-	var includesCredentials = function (url) {
-	  return url.username != '' || url.password != '';
-	};
+	var $$Q = _export;
+	var getBuiltIn$1 = getBuiltIn$b;
+	var apply = functionApply;
+	var bind$7 = functionBind;
+	var aConstructor = aConstructor$3;
+	var anObject$4 = anObject$n;
+	var isObject$a = isObject$s;
+	var create$4 = objectCreate;
+	var fails$m = fails$V;
 
-	var cannotHaveUsernamePasswordPort = function (url) {
-	  return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
-	};
+	var nativeConstruct = getBuiltIn$1('Reflect', 'construct');
+	var ObjectPrototype = Object.prototype;
+	var push$4 = [].push;
 
-	var isWindowsDriveLetter = function (string, normalized) {
-	  var second;
-	  return string.length == 2 && ALPHA.test(string.charAt(0))
-	    && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
-	};
+	// `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$m(function () {
+	  function F() { /* empty */ }
+	  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
+	});
 
-	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 === '#')
-	  );
-	};
+	var ARGS_BUG = !fails$m(function () {
+	  nativeConstruct(function () { /* empty */ });
+	});
+
+	var FORCED$c = NEW_TARGET_BUG || ARGS_BUG;
 
-	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();
+	$$Q({ target: 'Reflect', stat: true, forced: FORCED$c, sham: FORCED$c }, {
+	  construct: function construct(Target, args /* , newTarget */) {
+	    aConstructor(Target);
+	    anObject$4(args);
+	    var newTarget = arguments.length < 3 ? Target : aConstructor(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];
+	      apply(push$4, $args, args);
+	      return new (apply(bind$7, Target, $args))();
+	    }
+	    // with altered newTarget, not support built-in constructors
+	    var proto = newTarget.prototype;
+	    var instance = create$4(isObject$a(proto) ? proto : ObjectPrototype);
+	    var result = apply(Target, instance, args);
+	    return isObject$a(result) ? result : instance;
 	  }
-	};
+	});
 
-	var isSingleDot = function (segment) {
-	  return segment === '.' || segment.toLowerCase() === '%2e';
-	};
+	var hasOwn$4 = hasOwnProperty_1;
 
-	var isDoubleDot = function (segment) {
-	  segment = segment.toLowerCase();
-	  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+	var isDataDescriptor$1 = function (descriptor) {
+	  return descriptor !== undefined && (hasOwn$4(descriptor, 'value') || hasOwn$4(descriptor, 'writable'));
 	};
 
-	// 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 = {};
+	var $$P = _export;
+	var call$5 = functionCall;
+	var isObject$9 = isObject$s;
+	var anObject$3 = anObject$n;
+	var isDataDescriptor = isDataDescriptor$1;
+	var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
+	var getPrototypeOf = objectGetPrototypeOf;
 
-	// eslint-disable-next-line max-statements
-	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;
+	// `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$3(target) === receiver) return target[propertyKey];
+	  descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey);
+	  if (descriptor) return isDataDescriptor(descriptor)
+	    ? descriptor.value
+	    : descriptor.get === undefined ? undefined : call$5(descriptor.get, receiver);
+	  if (isObject$9(prototype = getPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
+	}
 
-	      case SCHEME:
-	        if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {
-	          buffer += char.toLowerCase();
-	        } else if (char == ':') {
-	          if (stateOverride && (
-	            (isSpecial(url) != has(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;
+	$$P({ target: 'Reflect', stat: true }, {
+	  get: get$3
+	});
 
-	      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;
+	var $$O = _export;
+	var fails$l = fails$V;
+	var toIndexedObject$1 = toIndexedObject$d;
+	var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var DESCRIPTORS$8 = descriptors;
 
-	      case SPECIAL_RELATIVE_OR_AUTHORITY:
-	        if (char == '/' && codePoints[pointer + 1] == '/') {
-	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-	          pointer++;
-	        } else {
-	          state = RELATIVE;
-	          continue;
-	        } break;
+	var FAILS_ON_PRIMITIVES$3 = fails$l(function () { nativeGetOwnPropertyDescriptor(1); });
+	var FORCED$b = !DESCRIPTORS$8 || FAILS_ON_PRIMITIVES$3;
 
-	      case PATH_OR_AUTHORITY:
-	        if (char == '/') {
-	          state = AUTHORITY;
-	          break;
-	        } else {
-	          state = PATH;
-	          continue;
-	        }
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+	$$O({ target: 'Object', stat: true, forced: FORCED$b, sham: !DESCRIPTORS$8 }, {
+	  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+	    return nativeGetOwnPropertyDescriptor(toIndexedObject$1(it), key);
+	  }
+	});
 
-	      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;
+	var $$N = _export;
+	var global$i = global$1o;
+	var toAbsoluteIndex$1 = toAbsoluteIndex$9;
+	var toIntegerOrInfinity$2 = toIntegerOrInfinity$b;
+	var lengthOfArrayLike$5 = lengthOfArrayLike$i;
+	var toObject$7 = toObject$i;
+	var arraySpeciesCreate$2 = arraySpeciesCreate$4;
+	var createProperty$2 = createProperty$5;
+	var arrayMethodHasSpeciesSupport$2 = arrayMethodHasSpeciesSupport$5;
 
-	      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;
+	var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport$2('splice');
 
-	      case SPECIAL_AUTHORITY_SLASHES:
-	        state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-	        if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
-	        pointer++;
-	        break;
+	var TypeError$6 = global$i.TypeError;
+	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';
 
-	      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;
+	// `Array.prototype.splice` method
+	// https://tc39.es/ecma262/#sec-array.prototype.splice
+	// with adding support of @@species
+	$$N({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+	  splice: function splice(start, deleteCount /* , ...items */) {
+	    var O = toObject$7(this);
+	    var len = lengthOfArrayLike$5(O);
+	    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 {
+	      insertCount = argumentsLength - 2;
+	      actualDeleteCount = min$3(max$1(toIntegerOrInfinity$2(deleteCount), 0), len - actualStart);
+	    }
+	    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
+	      throw TypeError$6(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
+	    }
+	    A = arraySpeciesCreate$2(O, actualDeleteCount);
+	    for (k = 0; k < actualDeleteCount; k++) {
+	      from = actualStart + k;
+	      if (from in O) createProperty$2(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];
+	      }
+	      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];
+	      }
+	    }
+	    for (k = 0; k < insertCount; k++) {
+	      O[k + actualStart] = arguments[k + 2];
+	    }
+	    O.length = len - actualDeleteCount + insertCount;
+	    return A;
+	  }
+	});
 
-	      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;
+	var defineWellKnownSymbol$1 = defineWellKnownSymbol$4;
 
-	      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;
+	// `Symbol.toStringTag` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.tostringtag
+	defineWellKnownSymbol$1('toStringTag');
 
-	      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;
+	var global$h = global$1o;
+	var setToStringTag$3 = setToStringTag$a;
 
-	      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;
+	// JSON[@@toStringTag] property
+	// https://tc39.es/ecma262/#sec-json-@@tostringtag
+	setToStringTag$3(global$h.JSON, 'JSON', true);
 
-	      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;
+	var setToStringTag$2 = setToStringTag$a;
 
-	      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;
+	// Math[@@toStringTag] property
+	// https://tc39.es/ecma262/#sec-math-@@tostringtag
+	setToStringTag$2(Math, 'Math', true);
+
+	(function (factory) {
+	  factory();
+	})(function () {
+
+	  function _classCallCheck(instance, Constructor) {
+	    if (!(instance instanceof Constructor)) {
+	      throw new TypeError("Cannot call a class as a function");
 	    }
+	  }
 
-	    pointer++;
+	  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);
+	    }
 	  }
-	};
 
-	// `URL` constructor
-	// https://url.spec.whatwg.org/#url-class
-	var URLConstructor = function URL(url /* , base */) {
-	  var that = anInstance(this, URLConstructor, 'URL');
-	  var base = arguments.length > 1 ? arguments[1] : undefined;
-	  var urlString = String(url);
-	  var state = setInternalState$6(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) {
-	    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 _createClass(Constructor, protoProps, staticProps) {
+	    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	    if (staticProps) _defineProperties(Constructor, staticProps);
+	    return Constructor;
 	  }
-	};
 
-	var URLPrototype = URLConstructor.prototype;
+	  function _inherits(subClass, superClass) {
+	    if (typeof superClass !== "function" && superClass !== null) {
+	      throw new TypeError("Super expression must either be null or a function");
+	    }
 
-	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 : '') + '@';
-	    }
-	    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;
-	};
+	    subClass.prototype = Object.create(superClass && superClass.prototype, {
+	      constructor: {
+	        value: subClass,
+	        writable: true,
+	        configurable: true
+	      }
+	    });
+	    if (superClass) _setPrototypeOf(subClass, superClass);
+	  }
 
-	var getOrigin = function () {
-	  var url = getInternalURLState(this);
-	  var scheme = url.scheme;
-	  var port = url.port;
-	  if (scheme == 'blob') try {
-	    return new URL(scheme.path[0]).origin;
-	  } catch (error) {
-	    return 'null';
+	  function _getPrototypeOf(o) {
+	    _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
+	      return o.__proto__ || Object.getPrototypeOf(o);
+	    };
+	    return _getPrototypeOf(o);
 	  }
-	  if (scheme == 'file' || !isSpecial(url)) return 'null';
-	  return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
-	};
 
-	var getProtocol = function () {
-	  return getInternalURLState(this).scheme + ':';
-	};
+	  function _setPrototypeOf(o, p) {
+	    _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
+	      o.__proto__ = p;
+	      return o;
+	    };
 
-	var getUsername = function () {
-	  return getInternalURLState(this).username;
-	};
+	    return _setPrototypeOf(o, p);
+	  }
 
-	var getPassword = function () {
-	  return getInternalURLState(this).password;
-	};
+	  function _isNativeReflectConstruct() {
+	    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+	    if (Reflect.construct.sham) return false;
+	    if (typeof Proxy === "function") return true;
 
-	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;
-	};
+	    try {
+	      Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
+	  }
 
-	var getHostname = function () {
-	  var host = getInternalURLState(this).host;
-	  return host === null ? '' : serializeHost(host);
-	};
+	  function _assertThisInitialized(self) {
+	    if (self === void 0) {
+	      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+	    }
 
-	var getPort = function () {
-	  var port = getInternalURLState(this).port;
-	  return port === null ? '' : String(port);
-	};
+	    return self;
+	  }
 
-	var getPathname = function () {
-	  var url = getInternalURLState(this);
-	  var path = url.path;
-	  return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
-	};
+	  function _possibleConstructorReturn(self, call) {
+	    if (call && (_typeof(call) === "object" || typeof call === "function")) {
+	      return call;
+	    }
 
-	var getSearch = function () {
-	  var query = getInternalURLState(this).query;
-	  return query ? '?' + query : '';
-	};
+	    return _assertThisInitialized(self);
+	  }
 
-	var getSearchParams = function () {
-	  return getInternalURLState(this).searchParams;
-	};
+	  function _createSuper(Derived) {
+	    var hasNativeReflectConstruct = _isNativeReflectConstruct();
 
-	var getHash = function () {
-	  var fragment = getInternalURLState(this).fragment;
-	  return fragment ? '#' + fragment : '';
-	};
+	    return function _createSuperInternal() {
+	      var Super = _getPrototypeOf(Derived),
+	          result;
 
-	var accessorDescriptor = function (getter, setter) {
-	  return { get: getter, set: setter, configurable: true, enumerable: true };
-	};
+	      if (hasNativeReflectConstruct) {
+	        var NewTarget = _getPrototypeOf(this).constructor;
 
-	if (descriptors) {
-	  objectDefineProperties(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);
+	        result = Reflect.construct(Super, arguments, NewTarget);
+	      } else {
+	        result = Super.apply(this, arguments);
 	      }
-	    }),
-	    // `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);
-	    })
-	  });
-	}
 
-	// `URL.prototype.toJSON` method
-	// https://url.spec.whatwg.org/#dom-url-tojson
-	redefine(URLPrototype, 'toJSON', function toJSON() {
-	  return serializeURL.call(this);
-	}, { enumerable: true });
+	      return _possibleConstructorReturn(this, result);
+	    };
+	  }
 
-	// `URL.prototype.toString` method
-	// https://url.spec.whatwg.org/#URL-stringification-behavior
-	redefine(URLPrototype, 'toString', function toString() {
-	  return serializeURL.call(this);
-	}, { enumerable: true });
+	  function _superPropBase(object, property) {
+	    while (!Object.prototype.hasOwnProperty.call(object, property)) {
+	      object = _getPrototypeOf(object);
+	      if (object === null) break;
+	    }
 
-	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
-	  if (nativeCreateObjectURL) redefine(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
-	  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
-	    return nativeRevokeObjectURL.apply(NativeURL, arguments);
-	  });
-	}
+	    return object;
+	  }
 
-	setToStringTag(URLConstructor, 'URL');
+	  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);
 
-	_export({ global: true, forced: !nativeUrl, sham: !descriptors }, {
-	  URL: URLConstructor
-	});
+	        if (!base) return;
+	        var desc = Object.getOwnPropertyDescriptor(base, property);
 
-	function _typeof(obj) {
-	  "@babel/helpers - typeof";
+	        if (desc.get) {
+	          return desc.get.call(receiver);
+	        }
 
-	  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;
-	    };
+	        return desc.value;
+	      };
+	    }
+
+	    return _get(target, property, receiver || target);
 	  }
 
-	  return _typeof(obj);
-	}
+	  var Emitter = /*#__PURE__*/function () {
+	    function Emitter() {
+	      _classCallCheck(this, Emitter);
 
-	function _classCallCheck(instance, Constructor) {
-	  if (!(instance instanceof Constructor)) {
-	    throw new TypeError("Cannot call a class as a function");
-	  }
-	}
+	      Object.defineProperty(this, 'listeners', {
+	        value: {},
+	        writable: true,
+	        configurable: true
+	      });
+	    }
 
-	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);
-	  }
-	}
+	    _createClass(Emitter, [{
+	      key: "addEventListener",
+	      value: function addEventListener(type, callback, options) {
+	        if (!(type in this.listeners)) {
+	          this.listeners[type] = [];
+	        }
 
-	function _createClass(Constructor, protoProps, staticProps) {
-	  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
-	  if (staticProps) _defineProperties(Constructor, staticProps);
-	  return Constructor;
-	}
+	        this.listeners[type].push({
+	          callback: callback,
+	          options: options
+	        });
+	      }
+	    }, {
+	      key: "removeEventListener",
+	      value: function removeEventListener(type, callback) {
+	        if (!(type in this.listeners)) {
+	          return;
+	        }
 
-	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;
-	  }
+	        var stack = this.listeners[type];
 
-	  return obj;
-	}
+	        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;
+	        }
 
-	function _slicedToArray(arr, i) {
-	  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
-	}
+	        var stack = this.listeners[event.type];
+	        var stackToCall = stack.slice();
 
-	function _toConsumableArray(arr) {
-	  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
-	}
+	        for (var i = 0, l = stackToCall.length; i < l; i++) {
+	          var listener = stackToCall[i];
 
-	function _arrayWithoutHoles(arr) {
-	  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
-	}
+	          try {
+	            listener.callback.call(this, event);
+	          } catch (e) {
+	            Promise.resolve().then(function () {
+	              throw e;
+	            });
+	          }
 
-	function _arrayWithHoles(arr) {
-	  if (Array.isArray(arr)) return arr;
-	}
+	          if (listener.options && listener.options.once) {
+	            this.removeEventListener(event.type, listener.callback);
+	          }
+	        }
 
-	function _iterableToArray(iter) {
-	  if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
-	}
+	        return !event.defaultPrevented;
+	      }
+	    }]);
 
-	function _iterableToArrayLimit(arr, i) {
-	  if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
-	  var _arr = [];
-	  var _n = true;
-	  var _d = false;
-	  var _e = undefined;
+	    return Emitter;
+	  }();
 
-	  try {
-	    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
-	      _arr.push(_s.value);
+	  var AbortSignal = /*#__PURE__*/function (_Emitter) {
+	    _inherits(AbortSignal, _Emitter);
 
-	      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;
-	    }
-	  }
+	    var _super = _createSuper(AbortSignal);
 
-	  return _arr;
-	}
+	    function AbortSignal() {
+	      var _this;
 
-	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);
-	}
+	      _classCallCheck(this, AbortSignal);
 
-	function _arrayLikeToArray(arr, len) {
-	  if (len == null || len > arr.length) len = arr.length;
+	      _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, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
+	      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
 
-	  return arr2;
-	}
 
-	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.");
-	}
+	      Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
+	        value: false,
+	        writable: true,
+	        configurable: true
+	      });
+	      Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
+	        value: null,
+	        writable: true,
+	        configurable: true
+	      });
+	      return _this;
+	    }
 
-	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.");
-	}
+	    _createClass(AbortSignal, [{
+	      key: "toString",
+	      value: function toString() {
+	        return '[object AbortSignal]';
+	      }
+	    }, {
+	      key: "dispatchEvent",
+	      value: function dispatchEvent(event) {
+	        if (event.type === 'abort') {
+	          this.aborted = true;
 
-	function _createForOfIteratorHelper(o, allowArrayLike) {
-	  var it;
+	          if (typeof this.onabort === 'function') {
+	            this.onabort.call(this, event);
+	          }
+	        }
 
-	  if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
-	    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
-	      if (it) o = it;
-	      var i = 0;
+	        _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);
+	      }
+	    }]);
 
-	      var F = function () {};
+	    return AbortSignal;
+	  }(Emitter);
 
-	      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
-	      };
-	    }
+	  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
 
-	    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
-	  }
 
-	  var normalCompletion = true,
-	      didErr = false,
-	      err;
-	  return {
-	    s: function () {
-	      it = o[Symbol.iterator]();
-	    },
-	    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;
-	      }
+	      Object.defineProperty(this, 'signal', {
+	        value: new AbortSignal(),
+	        writable: true,
+	        configurable: true
+	      });
 	    }
-	  };
-	}
 
-	var global$1 = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$1 !== 'undefined' && global$1;
-	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
-	};
+	    _createClass(AbortController, [{
+	      key: "abort",
+	      value: function abort() {
+	        var event;
 
-	function isDataView(obj) {
-	  return obj && DataView.prototype.isPrototypeOf(obj);
-	}
+	        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
+	            };
+	          }
+	        }
 
-	if (support.arrayBuffer) {
-	  var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
+	        this.signal.dispatchEvent(event);
+	      }
+	    }, {
+	      key: "toString",
+	      value: function toString() {
+	        return '[object AbortController]';
+	      }
+	    }]);
 
-	  var isArrayBufferView = ArrayBuffer.isView || function (obj) {
-	    return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
-	  };
-	}
+	    return AbortController;
+	  }();
 
-	function normalizeName(name) {
-	  if (typeof name !== 'string') {
-	    name = String(name);
+	  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';
 	  }
 
-	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-	    throw new TypeError('Invalid character in header field name');
-	  }
+	  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
 
-	  return name.toLowerCase();
-	}
 
-	function normalizeValue(value) {
-	  if (typeof value !== 'string') {
-	    value = String(value);
+	    return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
 	  }
-
-	  return value;
-	} // Build a destructive iterator for the value list
+	  /**
+	   * 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}
+	   */
 
 
-	function iteratorFor(items) {
-	  var iterator = {
-	    next: function next() {
-	      var value = items.shift();
-	      return {
-	        done: value === undefined,
-	        value: value
+	  function abortableFetchDecorator(patchTargets) {
+	    if ('function' === typeof patchTargets) {
+	      patchTargets = {
+	        fetch: patchTargets
 	      };
 	    }
-	  };
 
-	  if (support.iterable) {
-	    iterator[Symbol.iterator] = function () {
-	      return iterator;
-	    };
-	  }
+	    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;
 
-	  return iterator;
-	}
+	    if (!polyfillNeeded({
+	      fetch: fetch,
+	      Request: NativeRequest,
+	      AbortController: NativeAbortController,
+	      __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
+	    })) {
+	      return {
+	        fetch: fetch,
+	        Request: Request
+	      };
+	    }
 
-	function Headers$1(headers) {
-	  this.map = {};
+	    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 (headers instanceof Headers$1) {
-	    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);
-	  }
-	}
+	    if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
+	      Request = function Request(input, init) {
+	        var signal;
 
-	Headers$1.prototype.append = function (name, value) {
-	  name = normalizeName(name);
-	  value = normalizeValue(value);
-	  var oldValue = this.map[name];
-	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
-	};
+	        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.
 
-	Headers$1.prototype['delete'] = function (name) {
-	  delete this.map[normalizeName(name)];
-	};
+	          delete init.signal;
+	        }
 
-	Headers$1.prototype.get = function (name) {
-	  name = normalizeName(name);
-	  return this.has(name) ? this.map[name] : null;
-	};
+	        var request = new NativeRequest(input, init);
 
-	Headers$1.prototype.has = function (name) {
-	  return this.map.hasOwnProperty(normalizeName(name));
-	};
+	        if (signal) {
+	          Object.defineProperty(request, 'signal', {
+	            writable: false,
+	            enumerable: false,
+	            configurable: true,
+	            value: signal
+	          });
+	        }
 
-	Headers$1.prototype.set = function (name, value) {
-	  this.map[normalizeName(name)] = normalizeValue(value);
-	};
+	        return request;
+	      };
 
-	Headers$1.prototype.forEach = function (callback, thisArg) {
-	  for (var name in this.map) {
-	    if (this.map.hasOwnProperty(name)) {
-	      callback.call(thisArg, this.map[name], name, this);
+	      Request.prototype = NativeRequest.prototype;
 	    }
-	  }
-	};
 
-	Headers$1.prototype.keys = function () {
-	  var items = [];
-	  this.forEach(function (value, name) {
-	    items.push(name);
-	  });
-	  return iteratorFor(items);
-	};
+	    var realFetch = fetch;
 
-	Headers$1.prototype.values = function () {
-	  var items = [];
-	  this.forEach(function (value) {
-	    items.push(value);
-	  });
-	  return iteratorFor(items);
-	};
-
-	Headers$1.prototype.entries = function () {
-	  var items = [];
-	  this.forEach(function (value, name) {
-	    items.push([name, value]);
-	  });
-	  return iteratorFor(items);
-	};
+	    var abortableFetch = function abortableFetch(input, init) {
+	      var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;
 
-	if (support.iterable) {
-	  Headers$1.prototype[Symbol.iterator] = Headers$1.prototype.entries;
-	}
+	      if (signal) {
+	        var abortError;
 
-	function consumed(body) {
-	  if (body.bodyUsed) {
-	    return Promise.reject(new TypeError('Already read'));
-	  }
+	        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
 
-	  body.bodyUsed = true;
-	}
 
-	function fileReaderReady(reader) {
-	  return new Promise(function (resolve, reject) {
-	    reader.onload = function () {
-	      resolve(reader.result);
-	    };
+	        if (signal.aborted) {
+	          return Promise.reject(abortError);
+	        } // Turn an event into a promise, reject it once `abort` is dispatched
 
-	    reader.onerror = function () {
-	      reject(reader.error);
-	    };
-	  });
-	}
 
-	function readBlobAsArrayBuffer(blob) {
-	  var reader = new FileReader();
-	  var promise = fileReaderReady(reader);
-	  reader.readAsArrayBuffer(blob);
-	  return promise;
-	}
+	        var cancellation = new Promise(function (_, reject) {
+	          signal.addEventListener('abort', function () {
+	            return reject(abortError);
+	          }, {
+	            once: true
+	          });
+	        });
 
-	function readBlobAsText(blob) {
-	  var reader = new FileReader();
-	  var promise = fileReaderReady(reader);
-	  reader.readAsText(blob);
-	  return promise;
-	}
+	        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 readArrayBufferAsText(buf) {
-	  var view = new Uint8Array(buf);
-	  var chars = new Array(view.length);
 
-	  for (var i = 0; i < view.length; i++) {
-	    chars[i] = String.fromCharCode(view[i]);
-	  }
+	        return Promise.race([cancellation, realFetch(input, init)]);
+	      }
 
-	  return chars.join('');
-	}
+	      return realFetch(input, init);
+	    };
 
-	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;
+	    return {
+	      fetch: abortableFetch,
+	      Request: Request
+	    };
 	  }
-	}
 
-	function Body() {
-	  this.bodyUsed = false;
+	  (function (self) {
+	    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.
+	    var _abortableFetch = abortableFetchDecorator(self),
+	        fetch = _abortableFetch.fetch,
+	        Request = _abortableFetch.Request;
 
-	      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);
-	    }
+	    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 (!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');
-	      }
-	    }
+	function actionAddEntity(way) {
+	  return function (graph) {
+	    return graph.replace(way);
 	  };
+	}
 
-	  if (support.blob) {
-	    this.blob = function () {
-	      var rejected = consumed(this);
+	var $$M = _export;
+	var global$g = global$1o;
+	var fails$k = fails$V;
+	var isArray$3 = isArray$8;
+	var isObject$8 = isObject$s;
+	var toObject$6 = toObject$i;
+	var lengthOfArrayLike$4 = lengthOfArrayLike$i;
+	var createProperty$1 = createProperty$5;
+	var arraySpeciesCreate$1 = arraySpeciesCreate$4;
+	var arrayMethodHasSpeciesSupport$1 = arrayMethodHasSpeciesSupport$5;
+	var wellKnownSymbol$2 = wellKnownSymbol$t;
+	var V8_VERSION = engineV8Version;
 
-	      if (rejected) {
-	        return rejected;
-	      }
+	var IS_CONCAT_SPREADABLE = wellKnownSymbol$2('isConcatSpreadable');
+	var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+	var TypeError$5 = global$g.TypeError;
 
-	      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]));
-	      }
-	    };
+	// 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$k(function () {
+	  var array = [];
+	  array[IS_CONCAT_SPREADABLE] = false;
+	  return array.concat()[0] !== array;
+	});
 
-	    this.arrayBuffer = function () {
-	      if (this._bodyArrayBuffer) {
-	        var isConsumed = consumed(this);
+	var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport$1('concat');
 
-	        if (isConsumed) {
-	          return isConsumed;
-	        }
+	var isConcatSpreadable = function (O) {
+	  if (!isObject$8(O)) return false;
+	  var spreadable = O[IS_CONCAT_SPREADABLE];
+	  return spreadable !== undefined ? !!spreadable : isArray$3(O);
+	};
 
-	        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);
-	        }
+	var FORCED$a = !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
+	$$M({ target: 'Array', proto: true, forced: FORCED$a }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  concat: function concat(arg) {
+	    var O = toObject$6(this);
+	    var A = arraySpeciesCreate$1(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 = lengthOfArrayLike$4(E);
+	        if (n + len > MAX_SAFE_INTEGER) throw TypeError$5(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        for (k = 0; k < len; k++, n++) if (k in E) createProperty$1(A, n, E[k]);
 	      } else {
-	        return this.blob().then(readBlobAsArrayBuffer);
+	        if (n >= MAX_SAFE_INTEGER) throw TypeError$5(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        createProperty$1(A, n++, E);
 	      }
-	    };
+	    }
+	    A.length = n;
+	    return A;
 	  }
+	});
 
-	  this.text = function () {
-	    var rejected = consumed(this);
+	var DESCRIPTORS$7 = descriptors;
+	var uncurryThis$l = functionUncurryThis;
+	var call$4 = functionCall;
+	var fails$j = fails$V;
+	var objectKeys$1 = objectKeys$4;
+	var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
+	var propertyIsEnumerableModule = objectPropertyIsEnumerable;
+	var toObject$5 = toObject$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$4 = Object.defineProperty;
+	var concat = uncurryThis$l([].concat);
 
-	    if (rejected) {
-	      return rejected;
+	// `Object.assign` method
+	// https://tc39.es/ecma262/#sec-object.assign
+	var objectAssign = !$assign || fails$j(function () {
+	  // should have correct order of operations (Edge bug)
+	  if (DESCRIPTORS$7 && $assign({ b: 1 }, $assign(defineProperty$4({}, 'a', {
+	    enumerable: true,
+	    get: function () {
+	      defineProperty$4(this, 'b', {
+	        value: 3,
+	        enumerable: false
+	      });
 	    }
-
-	    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);
+	  }), { 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$5(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 ? concat(objectKeys$1(S), getOwnPropertySymbols(S)) : objectKeys$1(S);
+	    var length = keys.length;
+	    var j = 0;
+	    var key;
+	    while (length > j) {
+	      key = keys[j++];
+	      if (!DESCRIPTORS$7 || call$4(propertyIsEnumerable, S, key)) T[key] = S[key];
 	    }
-	  };
+	  } return T;
+	} : $assign;
 
-	  if (support.formData) {
-	    this.formData = function () {
-	      return this.text().then(decode);
-	    };
-	  }
+	var $$L = _export;
+	var assign$2 = objectAssign;
 
-	  this.json = function () {
-	    return this.text().then(JSON.parse);
-	  };
+	// `Object.assign` method
+	// https://tc39.es/ecma262/#sec-object.assign
+	// eslint-disable-next-line es/no-object-assign -- required for testing
+	$$L({ target: 'Object', stat: true, forced: Object.assign !== assign$2 }, {
+	  assign: assign$2
+	});
 
-	  return this;
-	} // HTTP methods whose capitalization should be normalized
+	var $$K = _export;
+	var $filter = arrayIteration.filter;
+	var arrayMethodHasSpeciesSupport = arrayMethodHasSpeciesSupport$5;
 
+	var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');
 
-	var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
+	// `Array.prototype.filter` method
+	// https://tc39.es/ecma262/#sec-array.prototype.filter
+	// with adding support of @@species
+	$$K({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
+	  filter: function filter(callbackfn /* , thisArg */) {
+	    return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	function normalizeMethod(method) {
-	  var upcased = method.toUpperCase();
-	  return methods.indexOf(upcased) > -1 ? upcased : method;
-	}
+	var $$J = _export;
+	var toObject$4 = toObject$i;
+	var nativeKeys = objectKeys$4;
+	var fails$i = fails$V;
 
-	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.');
+	var FAILS_ON_PRIMITIVES$2 = fails$i(function () { nativeKeys(1); });
+
+	// `Object.keys` method
+	// https://tc39.es/ecma262/#sec-object.keys
+	$$J({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2 }, {
+	  keys: function keys(it) {
+	    return nativeKeys(toObject$4(it));
 	  }
+	});
 
-	  options = options || {};
-	  var body = options.body;
+	var $$I = _export;
+	var uncurryThis$k = functionUncurryThis;
+	var isArray$2 = isArray$8;
 
-	  if (input instanceof Request) {
-	    if (input.bodyUsed) {
-	      throw new TypeError('Already read');
-	    }
+	var un$Reverse = uncurryThis$k([].reverse);
+	var test$1 = [1, 2];
 
-	    this.url = input.url;
-	    this.credentials = input.credentials;
+	// `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
+	$$I({ 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$2(this)) this.length = this.length;
+	    return un$Reverse(this);
+	  }
+	});
 
-	    if (!options.headers) {
-	      this.headers = new Headers$1(input.headers);
-	    }
+	var global$f = global$1o;
+	var fails$h = fails$V;
+	var uncurryThis$j = functionUncurryThis;
+	var toString$c = toString$k;
+	var trim$4 = stringTrim.trim;
+	var whitespaces$1 = whitespaces$4;
+
+	var charAt$2 = uncurryThis$j(''.charAt);
+	var n$ParseFloat = global$f.parseFloat;
+	var Symbol$2 = global$f.Symbol;
+	var ITERATOR$1 = Symbol$2 && Symbol$2.iterator;
+	var FORCED$9 = 1 / n$ParseFloat(whitespaces$1 + '-0') !== -Infinity
+	  // MS Edge 18- broken with boxed symbols
+	  || (ITERATOR$1 && !fails$h(function () { n$ParseFloat(Object(ITERATOR$1)); }));
 
-	    this.method = input.method;
-	    this.mode = input.mode;
-	    this.signal = input.signal;
+	// `parseFloat` method
+	// https://tc39.es/ecma262/#sec-parsefloat-string
+	var numberParseFloat = FORCED$9 ? function parseFloat(string) {
+	  var trimmedString = trim$4(toString$c(string));
+	  var result = n$ParseFloat(trimmedString);
+	  return result === 0 && charAt$2(trimmedString, 0) == '-' ? -0 : result;
+	} : n$ParseFloat;
 
-	    if (!body && input._bodyInit != null) {
-	      body = input._bodyInit;
-	      input.bodyUsed = true;
-	    }
-	  } else {
-	    this.url = String(input);
-	  }
+	var $$H = _export;
+	var $parseFloat = numberParseFloat;
 
-	  this.credentials = options.credentials || this.credentials || 'same-origin';
+	// `parseFloat` method
+	// https://tc39.es/ecma262/#sec-parsefloat-string
+	$$H({ global: true, forced: parseFloat != $parseFloat }, {
+	  parseFloat: $parseFloat
+	});
 
-	  if (options.headers || !this.headers) {
-	    this.headers = new Headers$1(options.headers);
-	  }
+	/*
+	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.)
 
-	  this.method = normalizeMethod(options.method || this.method || 'GET');
-	  this.mode = options.mode || this.mode || null;
-	  this.signal = options.signal || this.signal;
-	  this.referrer = null;
+	In addition, numeric-valued `incline` tags are negated.
 
-	  if ((this.method === 'GET' || this.method === 'HEAD') && body) {
-	    throw new TypeError('Body not allowed for GET or HEAD requests');
-	  }
+	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._initBody(body);
+	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'
+	  };
 
-	  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 reverseKey(key) {
+	    for (var i = 0; i < keyReplacements.length; ++i) {
+	      var replacement = keyReplacements[i];
 
-	      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();
+	      if (replacement[0].test(key)) {
+	        return key.replace(replacement[0], replacement[1]);
 	      }
 	    }
-	  }
-	}
 
-	Request.prototype.clone = function () {
-	  return new Request(this, {
-	    body: this._bodyInit
-	  });
-	};
+	    return key;
+	  }
 
-	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;
-	}
+	  function reverseValue(key, value, includeAbsolute) {
+	    if (ignoreKey.test(key)) return value; // Turn lanes are left/right to key (not way) direction - #5674
 
-	function parseHeaders(rawHeaders) {
-	  var headers = new Headers$1(); // 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
+	    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);
 
-	  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 (typeof degrees === 'number' && !isNaN(degrees)) {
+	        if (degrees < 180) {
+	          degrees += 180;
+	        } else {
+	          degrees -= 180;
+	        }
 
-	    if (key) {
-	      var value = parts.join(':').trim();
-	      headers.append(key, value);
+	        return degrees.toString();
+	      }
 	    }
-	  });
-	  return headers;
-	}
-
-	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.');
-	  }
-
-	  if (!options) {
-	    options = {};
-	  }
 
-	  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$1(options.headers);
-	  this.url = options.url || '';
+	    return valueReplacements[value] || value;
+	  } // Reverse the direction of tags attached to the nodes - #3076
 
-	  this._initBody(bodyInit);
-	}
-	Body.call(Response.prototype);
 
-	Response.prototype.clone = function () {
-	  return new Response(this._bodyInit, {
-	    status: this.status,
-	    statusText: this.statusText,
-	    headers: new Headers$1(this.headers),
-	    url: this.url
-	  });
-	};
+	  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 = {};
 
-	Response.error = function () {
-	  var response = new Response(null, {
-	    status: 0,
-	    statusText: ''
-	  });
-	  response.type = 'error';
-	  return response;
-	};
+	      for (var key in node.tags) {
+	        tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
+	      }
 
-	var redirectStatuses = [301, 302, 303, 307, 308];
+	      graph = graph.replace(node.update({
+	        tags: tags
+	      }));
+	    }
 
-	Response.redirect = function (url, status) {
-	  if (redirectStatuses.indexOf(status) === -1) {
-	    throw new RangeError('Invalid status code');
+	    return graph;
 	  }
 
-	  return new Response(null, {
-	    status: status,
-	    headers: {
-	      location: url
-	    }
-	  });
-	};
+	  function reverseWay(graph, way) {
+	    var nodes = way.nodes.slice().reverse();
+	    var tags = {};
+	    var role;
 
-	var DOMException$1 = global$1.DOMException;
+	    for (var key in way.tags) {
+	      tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
+	    }
 
-	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;
-	  };
+	    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
 
-	  DOMException$1.prototype = Object.create(Error.prototype);
-	  DOMException$1.prototype.constructor = DOMException$1;
-	}
+	    return reverseNodeTags(graph, nodes).replace(way.update({
+	      nodes: nodes,
+	      tags: tags
+	    }));
+	  }
 
-	function fetch$1(input, init) {
-	  return new Promise(function (resolve, reject) {
-	    var request = new Request(input, init);
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
-	    if (request.signal && request.signal.aborted) {
-	      return reject(new DOMException$1('Aborted', 'AbortError'));
+	    if (entity.type === 'way') {
+	      return reverseWay(graph, entity);
 	    }
 
-	    var xhr = new XMLHttpRequest();
+	    return reverseNodeTags(graph, [entityID]);
+	  };
 
-	    function abortXhr() {
-	      xhr.abort();
-	    }
+	  action.disabled = function (graph) {
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || entity.type === 'way') return false;
 
-	    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);
-	    };
+	    for (var key in entity.tags) {
+	      var value = entity.tags[key];
 
-	    xhr.onerror = function () {
-	      setTimeout(function () {
-	        reject(new TypeError('Network request failed'));
-	      }, 0);
-	    };
+	      if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
+	        return false;
+	      }
+	    }
 
-	    xhr.ontimeout = function () {
-	      setTimeout(function () {
-	        reject(new TypeError('Network request failed'));
-	      }, 0);
-	    };
+	    return 'nondirectional_node';
+	  };
 
-	    xhr.onabort = function () {
-	      setTimeout(function () {
-	        reject(new DOMException$1('Aborted', 'AbortError'));
-	      }, 0);
-	    };
+	  action.entityID = function () {
+	    return entityID;
+	  };
 
-	    function fixUrl(url) {
-	      try {
-	        return url === '' && global$1.location.href ? global$1.location.href : url;
-	      } catch (e) {
-	        return url;
-	      }
-	    }
+	  return action;
+	}
 
-	    xhr.open(request.method, fixUrl(request.url), true);
+	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
 
-	    if (request.credentials === 'include') {
-	      xhr.withCredentials = true;
-	    } else if (request.credentials === 'omit') {
-	      xhr.withCredentials = false;
+	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 = {};
 
-	    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';
-	      }
+	  for (var key in tags) {
+	    if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
 	    }
 
-	    if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers$1)) {
-	      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);
-	      });
+	    if (key in lineKeys && tags[key] in lineKeys[key]) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
 	    }
+	  }
 
-	    if (request.signal) {
-	      request.signal.addEventListener('abort', abortXhr);
+	  return null;
+	} // Tags that indicate a node can be a standalone point
+	// e.g. { amenity: { bar: true, parking: true, ... } ... }
 
-	      xhr.onreadystatechange = function () {
-	        // DONE (success or failure)
-	        if (xhr.readyState === 4) {
-	          request.signal.removeEventListener('abort', abortXhr);
-	        }
-	      };
-	    }
+	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 ... } ... }
 
-	    xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
-	  });
+	var osmVertexTags = {};
+	function osmSetVertexTags(value) {
+	  osmVertexTags = value;
 	}
-	fetch$1.polyfill = true;
+	function osmNodeGeometriesForTags(nodeTags) {
+	  var geometries = {};
 
-	if (!global$1.fetch) {
-	  global$1.fetch = fetch$1;
-	  global$1.Headers = Headers$1;
-	  global$1.Request = Request;
-	  global$1.Response = Response;
-	}
+	  for (var key in nodeTags) {
+	    if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
+	      geometries.point = true;
+	    }
 
-	// `Symbol.toStringTag` well-known symbol
-	// https://tc39.github.io/ecma262/#sec-symbol.tostringtag
-	defineWellKnownSymbol('toStringTag');
+	    if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
+	      geometries.vertex = true;
+	    } // break early if both are already supported
 
-	var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport('splice');
-	var USES_TO_LENGTH$5 = arrayMethodUsesToLength('splice', { ACCESSORS: true, 0: 0, 1: 2 });
 
-	var max$3 = Math.max;
-	var min$6 = Math.min;
-	var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
-	var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+	    if (geometries.point && geometries.vertex) break;
+	  }
 
-	// `Array.prototype.splice` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.splice
-	// with adding support of @@species
-	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 || !USES_TO_LENGTH$5 }, {
-	  splice: function splice(start, deleteCount /* , ...items */) {
-	    var O = toObject(this);
-	    var len = toLength(O.length);
-	    var actualStart = toAbsoluteIndex(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 {
-	      insertCount = argumentsLength - 2;
-	      actualDeleteCount = min$6(max$3(toInteger(deleteCount), 0), len - actualStart);
-	    }
-	    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) {
-	      throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
-	    }
-	    A = arraySpeciesCreate(O, actualDeleteCount);
-	    for (k = 0; k < actualDeleteCount; k++) {
-	      from = actualStart + k;
-	      if (from in O) createProperty(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];
-	      }
-	      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];
-	      }
-	    }
-	    for (k = 0; k < insertCount; k++) {
-	      O[k + actualStart] = arguments[k + 2];
-	    }
-	    O.length = len - actualDeleteCount + insertCount;
-	    return A;
+	  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
+	  },
+	  'seamark:type': {
+	    'separation_lane': true,
+	    'separation_roundabout': 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
 
-	// JSON[@@toStringTag] property
-	// https://tc39.github.io/ecma262/#sec-json-@@tostringtag
-	setToStringTag(global_1.JSON, 'JSON', true);
+	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
 
-	// Math[@@toStringTag] property
-	// https://tc39.github.io/ecma262/#sec-math-@@tostringtag
-	setToStringTag(Math, 'Math', true);
+	var osmSemipavedTags = {
+	  'surface': {
+	    'cobblestone': true,
+	    'cobblestone:flattened': true,
+	    'unhewn_cobblestone': true,
+	    'sett': true,
+	    'paving_stones': true,
+	    'metal': true,
+	    'wood': true
+	  }
+	};
+	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`)
 
-	// `Object.defineProperty` method
-	// https://tc39.github.io/ecma262/#sec-object.defineproperty
-	_export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
-	  defineProperty: objectDefineProperty.f
-	});
+	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 nativeGetOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+	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')
 
+	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
 
-	var FAILS_ON_PRIMITIVES$1 = fails(function () { nativeGetOwnPropertyDescriptor$2(1); });
-	var FORCED$5 = !descriptors || FAILS_ON_PRIMITIVES$1;
+	var osmFlowingWaterwayTagValues = {
+	  canal: true,
+	  ditch: true,
+	  drain: true,
+	  fish_pass: true,
+	  river: true,
+	  stream: true,
+	  tidal_channel: true
+	};
 
-	// `Object.getOwnPropertyDescriptor` method
-	// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
-	_export({ target: 'Object', stat: true, forced: FORCED$5, sham: !descriptors }, {
-	  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
-	    return nativeGetOwnPropertyDescriptor$2(toIndexedObject(it), key);
-	  }
-	});
+	var global$e = global$1o;
+	var fails$g = fails$V;
+	var uncurryThis$i = functionUncurryThis;
+	var toString$b = toString$k;
+	var trim$3 = stringTrim.trim;
+	var whitespaces = whitespaces$4;
+
+	var $parseInt$1 = global$e.parseInt;
+	var Symbol$1 = global$e.Symbol;
+	var ITERATOR = Symbol$1 && Symbol$1.iterator;
+	var hex$2 = /^[+-]?0x/i;
+	var exec$3 = uncurryThis$i(hex$2.exec);
+	var FORCED$8 = $parseInt$1(whitespaces + '08') !== 8 || $parseInt$1(whitespaces + '0x16') !== 22
+	  // MS Edge 18- broken with boxed symbols
+	  || (ITERATOR && !fails$g(function () { $parseInt$1(Object(ITERATOR)); }));
 
-	var FAILS_ON_PRIMITIVES$2 = fails(function () { objectGetPrototypeOf(1); });
+	// `parseInt` method
+	// https://tc39.es/ecma262/#sec-parseint-string-radix
+	var numberParseInt = FORCED$8 ? function parseInt(string, radix) {
+	  var S = trim$3(toString$b(string));
+	  return $parseInt$1(S, (radix >>> 0) || (exec$3(hex$2, S) ? 16 : 10));
+	} : $parseInt$1;
 
-	// `Object.getPrototypeOf` method
-	// https://tc39.github.io/ecma262/#sec-object.getprototypeof
-	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2, sham: !correctPrototypeGetter }, {
-	  getPrototypeOf: function getPrototypeOf(it) {
-	    return objectGetPrototypeOf(toObject(it));
-	  }
-	});
+	var $$G = _export;
+	var $parseInt = numberParseInt;
 
-	// `Object.setPrototypeOf` method
-	// https://tc39.github.io/ecma262/#sec-object.setprototypeof
-	_export({ target: 'Object', stat: true }, {
-	  setPrototypeOf: objectSetPrototypeOf
+	// `parseInt` method
+	// https://tc39.es/ecma262/#sec-parseint-string-radix
+	$$G({ global: true, forced: parseInt != $parseInt }, {
+	  parseInt: $parseInt
 	});
 
-	var slice$1 = [].slice;
-	var factories = {};
+	var internalMetadata = {exports: {}};
 
-	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
-	    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
-	  } return factories[argsLength](C, args);
-	};
+	// FF26- bug: ArrayBuffers are non-extensible, but Object.isExtensible does not report it
+	var fails$f = fails$V;
 
-	// `Function.prototype.bind` method implementation
-	// https://tc39.github.io/ecma262/#sec-function.prototype.bind
-	var functionBind = Function.bind || function bind(that /* , ...args */) {
-	  var fn = aFunction$1(this);
-	  var partArgs = slice$1.call(arguments, 1);
-	  var boundFunction = function bound(/* args... */) {
-	    var args = partArgs.concat(slice$1.call(arguments));
-	    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
-	  };
-	  if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
-	  return boundFunction;
-	};
+	var arrayBufferNonExtensible = fails$f(function () {
+	  if (typeof ArrayBuffer == 'function') {
+	    var buffer = new ArrayBuffer(8);
+	    // eslint-disable-next-line es/no-object-isextensible, es/no-object-defineproperty -- safe
+	    if (Object.isExtensible(buffer)) Object.defineProperty(buffer, 'a', { value: 8 });
+	  }
+	});
 
-	var nativeConstruct = getBuiltIn('Reflect', 'construct');
+	var fails$e = fails$V;
+	var isObject$7 = isObject$s;
+	var classof = classofRaw$1;
+	var ARRAY_BUFFER_NON_EXTENSIBLE = arrayBufferNonExtensible;
 
-	// `Reflect.construct` method
-	// https://tc39.github.io/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(function () {
-	  function F() { /* empty */ }
-	  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
-	});
-	var ARGS_BUG = !fails(function () {
-	  nativeConstruct(function () { /* empty */ });
-	});
-	var FORCED$6 = NEW_TARGET_BUG || ARGS_BUG;
+	// eslint-disable-next-line es/no-object-isextensible -- safe
+	var $isExtensible = Object.isExtensible;
+	var FAILS_ON_PRIMITIVES$1 = fails$e(function () { $isExtensible(1); });
 
-	_export({ target: 'Reflect', stat: true, forced: FORCED$6, sham: FORCED$6 }, {
-	  construct: function construct(Target, args /* , newTarget */) {
-	    aFunction$1(Target);
-	    anObject(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 (functionBind.apply(Target, $args))();
-	    }
-	    // with altered newTarget, not support built-in constructors
-	    var proto = newTarget.prototype;
-	    var instance = objectCreate(isObject(proto) ? proto : Object.prototype);
-	    var result = Function.apply.call(Target, instance, args);
-	    return isObject(result) ? result : instance;
-	  }
-	});
+	// `Object.isExtensible` method
+	// https://tc39.es/ecma262/#sec-object.isextensible
+	var objectIsExtensible = (FAILS_ON_PRIMITIVES$1 || ARRAY_BUFFER_NON_EXTENSIBLE) ? function isExtensible(it) {
+	  if (!isObject$7(it)) return false;
+	  if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) == 'ArrayBuffer') return false;
+	  return $isExtensible ? $isExtensible(it) : true;
+	} : $isExtensible;
 
-	// `Reflect.get` method
-	// https://tc39.github.io/ecma262/#sec-reflect.get
-	function get$2(target, propertyKey /* , receiver */) {
-	  var receiver = arguments.length < 3 ? target : arguments[2];
-	  var descriptor, prototype;
-	  if (anObject(target) === receiver) return target[propertyKey];
-	  if (descriptor = objectGetOwnPropertyDescriptor.f(target, propertyKey)) return has(descriptor, 'value')
-	    ? descriptor.value
-	    : descriptor.get === undefined
-	      ? undefined
-	      : descriptor.get.call(receiver);
-	  if (isObject(prototype = objectGetPrototypeOf(target))) return get$2(prototype, propertyKey, receiver);
-	}
+	var fails$d = fails$V;
 
-	_export({ target: 'Reflect', stat: true }, {
-	  get: get$2
+	var freezing = !fails$d(function () {
+	  // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
+	  return Object.isExtensible(Object.preventExtensions({}));
 	});
 
-	(function (factory) {
-	   factory();
-	})(function () {
+	var $$F = _export;
+	var uncurryThis$h = functionUncurryThis;
+	var hiddenKeys = hiddenKeys$6;
+	var isObject$6 = isObject$s;
+	var hasOwn$3 = hasOwnProperty_1;
+	var defineProperty$3 = objectDefineProperty.f;
+	var getOwnPropertyNamesModule = objectGetOwnPropertyNames;
+	var getOwnPropertyNamesExternalModule = objectGetOwnPropertyNamesExternal;
+	var isExtensible = objectIsExtensible;
+	var uid = uid$5;
+	var FREEZING$1 = freezing;
+
+	var REQUIRED = false;
+	var METADATA = uid('meta');
+	var id$1 = 0;
 
-	  function _classCallCheck(instance, Constructor) {
-	    if (!(instance instanceof Constructor)) {
-	      throw new TypeError("Cannot call a class as a function");
-	    }
-	  }
+	var setMetadata = function (it) {
+	  defineProperty$3(it, METADATA, { value: {
+	    objectID: 'O' + id$1++, // object ID
+	    weakData: {}          // weak collections IDs
+	  } });
+	};
 
-	  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);
-	    }
-	  }
+	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 (!hasOwn$3(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;
+	};
 
-	  function _createClass(Constructor, protoProps, staticProps) {
-	    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
-	    if (staticProps) _defineProperties(Constructor, staticProps);
-	    return Constructor;
-	  }
+	var getWeakData = function (it, create) {
+	  if (!hasOwn$3(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;
+	};
 
-	  function _inherits(subClass, superClass) {
-	    if (typeof superClass !== "function" && superClass !== null) {
-	      throw new TypeError("Super expression must either be null or a function");
-	    }
+	// add metadata on freeze-family methods calling
+	var onFreeze$1 = function (it) {
+	  if (FREEZING$1 && REQUIRED && isExtensible(it) && !hasOwn$3(it, METADATA)) setMetadata(it);
+	  return it;
+	};
 
-	    subClass.prototype = Object.create(superClass && superClass.prototype, {
-	      constructor: {
-	        value: subClass,
-	        writable: true,
-	        configurable: true
-	      }
+	var enable = function () {
+	  meta.enable = function () { /* empty */ };
+	  REQUIRED = true;
+	  var getOwnPropertyNames = getOwnPropertyNamesModule.f;
+	  var splice = uncurryThis$h([].splice);
+	  var test = {};
+	  test[METADATA] = 1;
+
+	  // prevent exposing of metadata key
+	  if (getOwnPropertyNames(test).length) {
+	    getOwnPropertyNamesModule.f = function (it) {
+	      var result = getOwnPropertyNames(it);
+	      for (var i = 0, length = result.length; i < length; i++) {
+	        if (result[i] === METADATA) {
+	          splice(result, i, 1);
+	          break;
+	        }
+	      } return result;
+	    };
+
+	    $$F({ target: 'Object', stat: true, forced: true }, {
+	      getOwnPropertyNames: getOwnPropertyNamesExternalModule.f
 	    });
-	    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);
-	  }
+	var meta = internalMetadata.exports = {
+	  enable: enable,
+	  fastKey: fastKey$1,
+	  getWeakData: getWeakData,
+	  onFreeze: onFreeze$1
+	};
 
-	  function _setPrototypeOf(o, p) {
-	    _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
-	      o.__proto__ = p;
-	      return o;
-	    };
+	hiddenKeys[METADATA] = true;
 
-	    return _setPrototypeOf(o, p);
-	  }
+	var $$E = _export;
+	var global$d = global$1o;
+	var uncurryThis$g = functionUncurryThis;
+	var isForced$2 = isForced_1;
+	var redefine$4 = redefine$h.exports;
+	var InternalMetadataModule = internalMetadata.exports;
+	var iterate$1 = iterate$3;
+	var anInstance$2 = anInstance$7;
+	var isCallable$1 = isCallable$r;
+	var isObject$5 = isObject$s;
+	var fails$c = fails$V;
+	var checkCorrectnessOfIteration$1 = checkCorrectnessOfIteration$4;
+	var setToStringTag$1 = setToStringTag$a;
+	var inheritIfRequired$2 = inheritIfRequired$4;
+
+	var collection$2 = function (CONSTRUCTOR_NAME, wrapper, common) {
+	  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
+	  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
+	  var ADDER = IS_MAP ? 'set' : 'add';
+	  var NativeConstructor = global$d[CONSTRUCTOR_NAME];
+	  var NativePrototype = NativeConstructor && NativeConstructor.prototype;
+	  var Constructor = NativeConstructor;
+	  var exported = {};
 
-	  function _isNativeReflectConstruct() {
-	    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
-	    if (Reflect.construct.sham) return false;
-	    if (typeof Proxy === "function") return true;
+	  var fixMethod = function (KEY) {
+	    var uncurriedNativeMethod = uncurryThis$g(NativePrototype[KEY]);
+	    redefine$4(NativePrototype, KEY,
+	      KEY == 'add' ? function add(value) {
+	        uncurriedNativeMethod(this, value === 0 ? 0 : value);
+	        return this;
+	      } : KEY == 'delete' ? function (key) {
+	        return IS_WEAK && !isObject$5(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
+	      } : KEY == 'get' ? function get(key) {
+	        return IS_WEAK && !isObject$5(key) ? undefined : uncurriedNativeMethod(this, key === 0 ? 0 : key);
+	      } : KEY == 'has' ? function has(key) {
+	        return IS_WEAK && !isObject$5(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
+	      } : function set(key, value) {
+	        uncurriedNativeMethod(this, key === 0 ? 0 : key, value);
+	        return this;
+	      }
+	    );
+	  };
 
-	    try {
-	      Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
-	      return true;
-	    } catch (e) {
-	      return false;
+	  var REPLACE = isForced$2(
+	    CONSTRUCTOR_NAME,
+	    !isCallable$1(NativeConstructor) || !(IS_WEAK || NativePrototype.forEach && !fails$c(function () {
+	      new NativeConstructor().entries().next();
+	    }))
+	  );
+
+	  if (REPLACE) {
+	    // create collection constructor
+	    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
+	    InternalMetadataModule.enable();
+	  } 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$2(dummy, NativePrototype);
+	        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;
 	    }
-	  }
 
-	  function _assertThisInitialized(self) {
-	    if (self === void 0) {
-	      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+	    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
+	      fixMethod('delete');
+	      fixMethod('has');
+	      IS_MAP && fixMethod('get');
 	    }
 
-	    return self;
+	    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
+
+	    // weak collections should not contains .clear method
+	    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
 	  }
 
-	  function _possibleConstructorReturn(self, call) {
-	    if (call && (_typeof(call) === "object" || typeof call === "function")) {
-	      return call;
-	    }
+	  exported[CONSTRUCTOR_NAME] = Constructor;
+	  $$E({ global: true, forced: Constructor != NativeConstructor }, exported);
 
-	    return _assertThisInitialized(self);
-	  }
+	  setToStringTag$1(Constructor, CONSTRUCTOR_NAME);
 
-	  function _createSuper(Derived) {
-	    var hasNativeReflectConstruct = _isNativeReflectConstruct();
+	  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
 
-	    return function _createSuperInternal() {
-	      var Super = _getPrototypeOf(Derived),
-	          result;
+	  return Constructor;
+	};
 
-	      if (hasNativeReflectConstruct) {
-	        var NewTarget = _getPrototypeOf(this).constructor;
+	var defineProperty$2 = objectDefineProperty.f;
+	var create$3 = objectCreate;
+	var redefineAll = redefineAll$4;
+	var bind$6 = functionBindContext;
+	var anInstance$1 = anInstance$7;
+	var iterate = iterate$3;
+	var defineIterator = defineIterator$3;
+	var setSpecies$1 = setSpecies$5;
+	var DESCRIPTORS$6 = descriptors;
+	var fastKey = internalMetadata.exports.fastKey;
+	var InternalStateModule$1 = internalState;
+
+	var setInternalState$1 = InternalStateModule$1.set;
+	var internalStateGetterFor = InternalStateModule$1.getterFor;
+
+	var collectionStrong$2 = {
+	  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+	    var Constructor = wrapper(function (that, iterable) {
+	      anInstance$1(that, Prototype);
+	      setInternalState$1(that, {
+	        type: CONSTRUCTOR_NAME,
+	        index: create$3(null),
+	        first: undefined,
+	        last: undefined,
+	        size: 0
+	      });
+	      if (!DESCRIPTORS$6) that.size = 0;
+	      if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+	    });
 
-	        result = Reflect.construct(Super, arguments, NewTarget);
+	    var Prototype = Constructor.prototype;
+
+	    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
+
+	    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 {
-	        result = Super.apply(this, arguments);
-	      }
+	        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$6) state.size++;
+	        else that.size++;
+	        // add to index
+	        if (index !== 'F') state.index[index] = entry;
+	      } return that;
+	    };
 
-	      return _possibleConstructorReturn(this, result);
+	    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;
+	      }
 	    };
-	  }
 
-	  function _superPropBase(object, property) {
-	    while (!Object.prototype.hasOwnProperty.call(object, property)) {
-	      object = _getPrototypeOf(object);
-	      if (object === null) break;
-	    }
+	    redefineAll(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$6) 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$6) 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$6(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	        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);
+	      }
+	    });
 
-	    return object;
+	    redefineAll(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$6) defineProperty$2(Prototype, 'size', {
+	      get: function () {
+	        return getInternalState(this).size;
+	      }
+	    });
+	    return Constructor;
+	  },
+	  setStrong: function (Constructor, 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(Constructor, CONSTRUCTOR_NAME, function (iterated, kind) {
+	      setInternalState$1(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 _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);
+	var collection$1 = collection$2;
+	var collectionStrong$1 = collectionStrong$2;
 
-	        if (!base) return;
-	        var desc = Object.getOwnPropertyDescriptor(base, property);
+	// `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);
 
-	        if (desc.get) {
-	          return desc.get.call(receiver);
-	        }
+	function d3_ascending (a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+	}
 
-	        return desc.value;
-	      };
-	    }
+	function d3_bisector (f) {
+	  var delta = f;
+	  var compare = f;
 
-	    return _get(target, property, receiver || target);
+	  if (f.length === 1) {
+	    delta = function delta(d, x) {
+	      return f(d) - x;
+	    };
+
+	    compare = ascendingComparator(f);
 	  }
 
-	  var Emitter = /*#__PURE__*/function () {
-	    function Emitter() {
-	      _classCallCheck(this, Emitter);
+	  function left(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	      Object.defineProperty(this, 'listeners', {
-	        value: {},
-	        writable: true,
-	        configurable: true
-	      });
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
 	    }
 
-	    _createClass(Emitter, [{
-	      key: "addEventListener",
-	      value: function addEventListener(type, callback) {
-	        if (!(type in this.listeners)) {
-	          this.listeners[type] = [];
-	        }
-
-	        this.listeners[type].push(callback);
-	      }
-	    }, {
-	      key: "removeEventListener",
-	      value: function removeEventListener(type, callback) {
-	        if (!(type in this.listeners)) {
-	          return;
-	        }
+	    return lo;
+	  }
 
-	        var stack = this.listeners[type];
+	  function right(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	        for (var i = 0, l = stack.length; i < l; i++) {
-	          if (stack[i] === callback) {
-	            stack.splice(i, 1);
-	            return;
-	          }
-	        }
-	      }
-	    }, {
-	      key: "dispatchEvent",
-	      value: function dispatchEvent(event) {
-	        var _this = this;
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
+	    }
 
-	        if (!(event.type in this.listeners)) {
-	          return;
-	        }
+	    return lo;
+	  }
 
-	        var debounce = function debounce(callback) {
-	          setTimeout(function () {
-	            return callback.call(_this, event);
-	          });
-	        };
+	  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;
+	  }
 
-	        var stack = this.listeners[event.type];
+	  return {
+	    left: left,
+	    center: center,
+	    right: right
+	  };
+	}
 
-	        for (var i = 0, l = stack.length; i < l; i++) {
-	          debounce(stack[i]);
-	        }
+	function ascendingComparator(f) {
+	  return function (d, x) {
+	    return d3_ascending(f(d), x);
+	  };
+	}
 
-	        return !event.defaultPrevented;
-	      }
-	    }]);
+	var defineWellKnownSymbol = defineWellKnownSymbol$4;
 
-	    return Emitter;
-	  }();
+	// `Symbol.asyncIterator` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.asynciterator
+	defineWellKnownSymbol('asyncIterator');
 
-	  var AbortSignal = /*#__PURE__*/function (_Emitter) {
-	    _inherits(AbortSignal, _Emitter);
+	var runtime = {exports: {}};
 
-	    var _super = _createSuper(AbortSignal);
+	(function (module) {
+	  var runtime = function (exports) {
 
-	    function AbortSignal() {
-	      var _this2;
+	    var Op = Object.prototype;
+	    var hasOwn = Op.hasOwnProperty;
+	    var undefined$1; // More compressible than void 0.
 
-	      _classCallCheck(this, AbortSignal);
+	    var $Symbol = typeof Symbol === "function" ? Symbol : {};
+	    var iteratorSymbol = $Symbol.iterator || "@@iterator";
+	    var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
+	    var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
 
-	      _this2 = _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
+	    function define(obj, key, value) {
+	      Object.defineProperty(obj, key, {
+	        value: value,
+	        enumerable: true,
+	        configurable: true,
+	        writable: true
+	      });
+	      return obj[key];
+	    }
 
-	      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
+	    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 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.
 
-	      Object.defineProperty(_assertThisInitialized(_this2), 'aborted', {
-	        value: false,
-	        writable: true,
-	        configurable: true
-	      });
-	      Object.defineProperty(_assertThisInitialized(_this2), 'onabort', {
-	        value: null,
-	        writable: true,
-	        configurable: true
-	      });
-	      return _this2;
+	      generator._invoke = makeInvokeMethod(innerFn, self, context);
+	      return generator;
 	    }
 
-	    _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);
-	          }
-	        }
+	    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.
 
-	        _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);
+	    function tryCatch(fn, obj, arg) {
+	      try {
+	        return {
+	          type: "normal",
+	          arg: fn.call(obj, arg)
+	        };
+	      } catch (err) {
+	        return {
+	          type: "throw",
+	          arg: err
+	        };
 	      }
-	    }]);
-
-	    return AbortSignal;
-	  }(Emitter);
+	    }
 
-	  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
+	    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.
 
+	    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.
 
-	      Object.defineProperty(this, 'signal', {
-	        value: new AbortSignal(),
-	        writable: true,
-	        configurable: true
-	      });
-	    }
+	    function Generator() {}
 
-	    _createClass(AbortController, [{
-	      key: "abort",
-	      value: function abort() {
-	        var event;
+	    function GeneratorFunction() {}
 
-	        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 GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
+	    // don't natively support it.
 
-	        this.signal.dispatchEvent(event);
-	      }
-	    }, {
-	      key: "toString",
-	      value: function toString() {
-	        return '[object AbortController]';
-	      }
-	    }]);
 
-	    return AbortController;
-	  }();
+	    var IteratorPrototype = {};
+	    define(IteratorPrototype, iteratorSymbol, function () {
+	      return this;
+	    });
+	    var getProto = Object.getPrototypeOf;
+	    var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
 
-	  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';
-	  }
+	    if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
+	      // This environment has a native %IteratorPrototype%; use it instead
+	      // of the polyfill.
+	      IteratorPrototype = NativeIteratorPrototype;
+	    }
 
-	  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
+	    var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
+	    GeneratorFunction.prototype = GeneratorFunctionPrototype;
+	    define(Gp, "constructor", GeneratorFunctionPrototype);
+	    define(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 defineIteratorMethods(prototype) {
+	      ["next", "throw", "return"].forEach(function (method) {
+	        define(prototype, method, function (arg) {
+	          return this._invoke(method, arg);
+	        });
+	      });
+	    }
 
-	    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}
-	   */
+	    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;
+	    };
 
+	    exports.mark = function (genFun) {
+	      if (Object.setPrototypeOf) {
+	        Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
+	      } else {
+	        genFun.__proto__ = GeneratorFunctionPrototype;
+	        define(genFun, toStringTagSymbol, "GeneratorFunction");
+	      }
 
-	  function abortableFetchDecorator(patchTargets) {
-	    if ('function' === typeof patchTargets) {
-	      patchTargets = {
-	        fetch: patchTargets
-	      };
-	    }
+	      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.
 
-	    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;
 
-	    if (!polyfillNeeded({
-	      fetch: fetch,
-	      Request: NativeRequest,
-	      AbortController: NativeAbortController,
-	      __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
-	    })) {
+	    exports.awrap = function (arg) {
 	      return {
-	        fetch: fetch,
-	        Request: Request
+	        __await: arg
 	      };
-	    }
+	    };
 
-	    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
+	    function AsyncIterator(generator, PromiseImpl) {
+	      function invoke(method, arg, resolve, reject) {
+	        var record = tryCatch(generator[method], generator, arg);
 
-	    if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
-	      Request = function Request(input, init) {
-	        var signal;
+	        if (record.type === "throw") {
+	          reject(record.arg);
+	        } else {
+	          var result = record.arg;
+	          var value = result.value;
 
-	        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.
+	          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);
+	            });
+	          }
 
-	          delete init.signal;
+	          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 request = new NativeRequest(input, init);
+	      var previousPromise;
 
-	        if (signal) {
-	          Object.defineProperty(request, 'signal', {
-	            writable: false,
-	            enumerable: false,
-	            configurable: true,
-	            value: signal
+	      function enqueue(method, arg) {
+	        function callInvokeWithMethodAndArg() {
+	          return new PromiseImpl(function (resolve, reject) {
+	            invoke(method, arg, resolve, reject);
 	          });
 	        }
 
-	        return request;
-	      };
+	        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).
 
-	      Request.prototype = NativeRequest.prototype;
+
+	      this._invoke = enqueue;
 	    }
 
-	    var realFetch = fetch;
+	    defineIteratorMethods(AsyncIterator.prototype);
+	    define(AsyncIterator.prototype, asyncIteratorSymbol, function () {
+	      return this;
+	    });
+	    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.
 
-	    var abortableFetch = function abortableFetch(input, init) {
-	      var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;
+	    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();
+	      });
+	    };
 
-	      if (signal) {
-	        var abortError;
+	    function makeInvokeMethod(innerFn, self, context) {
+	      var state = GenStateSuspendedStart;
+	      return function invoke(method, arg) {
+	        if (state === GenStateExecuting) {
+	          throw new Error("Generator is already running");
+	        }
 
-	        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 (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
 
 
-	        if (signal.aborted) {
-	          return Promise.reject(abortError);
-	        } // Turn an event into a promise, reject it once `abort` is dispatched
+	          return doneResult();
+	        }
 
+	        context.method = method;
+	        context.arg = arg;
 
-	        var cancellation = new Promise(function (_, reject) {
-	          signal.addEventListener('abort', function () {
-	            return reject(abortError);
-	          }, {
-	            once: true
-	          });
-	        });
+	        while (true) {
+	          var delegate = context.delegate;
 
-	        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)
+	          if (delegate) {
+	            var delegateResult = maybeInvokeDelegate(delegate, context);
 
+	            if (delegateResult) {
+	              if (delegateResult === ContinueSentinel) continue;
+	              return delegateResult;
+	            }
+	          }
 
-	        return Promise.race([cancellation, realFetch(input, init)]);
-	      }
+	          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;
+	            }
 
-	      return realFetch(input, init);
-	    };
+	            context.dispatchException(context.arg);
+	          } else if (context.method === "return") {
+	            context.abrupt("return", context.arg);
+	          }
 
-	    return {
-	      fetch: abortableFetch,
-	      Request: Request
-	    };
-	  }
+	          state = GenStateExecuting;
+	          var record = tryCatch(innerFn, self, context);
 
-	  (function (self) {
-	    if (!polyfillNeeded(self)) {
-	      return;
-	    }
+	          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;
 
-	    if (!self.fetch) {
-	      console.warn('fetch() is not available, cannot install abortcontroller-polyfill');
-	      return;
-	    }
+	            if (record.arg === ContinueSentinel) {
+	              continue;
+	            }
 
-	    var _abortableFetch = abortableFetchDecorator(self),
-	        fetch = _abortableFetch.fetch,
-	        Request = _abortableFetch.Request;
+	            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.
 
-	    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);
-	});
+	            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 actionAddEntity(way) {
-	  return function (graph) {
-	    return graph.replace(way);
-	  };
-	}
 
-	var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
-	var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
-	var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+	    function maybeInvokeDelegate(delegate, context) {
+	      var method = delegate.iterator[context.method];
 
-	// 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 = engineV8Version >= 51 || !fails(function () {
-	  var array = [];
-	  array[IS_CONCAT_SPREADABLE] = false;
-	  return array.concat()[0] !== array;
-	});
+	      if (method === undefined$1) {
+	        // A .throw or .return when the delegate iterator has no .throw
+	        // method always terminates the yield* loop.
+	        context.delegate = null;
 
-	var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');
+	        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);
 
-	var isConcatSpreadable = function (O) {
-	  if (!isObject(O)) return false;
-	  var spreadable = O[IS_CONCAT_SPREADABLE];
-	  return spreadable !== undefined ? !!spreadable : isArray(O);
-	};
+	            if (context.method === "throw") {
+	              // If maybeInvokeDelegate(context) changed context.method from
+	              // "return" to "throw", let that override the TypeError below.
+	              return ContinueSentinel;
+	            }
+	          }
 
-	var FORCED$7 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+	          context.method = "throw";
+	          context.arg = new TypeError("The iterator does not provide a 'throw' method");
+	        }
 
-	// `Array.prototype.concat` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.concat
-	// with adding support of @@isConcatSpreadable and @@species
-	_export({ target: 'Array', proto: true, forced: FORCED$7 }, {
-	  concat: function concat(arg) { // eslint-disable-line no-unused-vars
-	    var O = toObject(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(E.length);
-	        if (n + len > MAX_SAFE_INTEGER$1) 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$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
-	        createProperty(A, n++, E);
+	        return ContinueSentinel;
 	      }
-	    }
-	    A.length = n;
-	    return A;
-	  }
-	});
 
-	// `Object.assign` method
-	// https://tc39.github.io/ecma262/#sec-object.assign
-	_export({ target: 'Object', stat: true, forced: Object.assign !== objectAssign }, {
-	  assign: objectAssign
-	});
+	      var record = tryCatch(method, delegate.iterator, context.arg);
 
-	var $filter$1 = arrayIteration.filter;
+	      if (record.type === "throw") {
+	        context.method = "throw";
+	        context.arg = record.arg;
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
 
+	      var info = record.arg;
 
+	      if (!info) {
+	        context.method = "throw";
+	        context.arg = new TypeError("iterator result is not an object");
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
 
-	var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport('filter');
-	// Edge 14- issue
-	var USES_TO_LENGTH$6 = arrayMethodUsesToLength('filter');
+	      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).
 
-	// `Array.prototype.filter` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.filter
-	// with adding support of @@species
-	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 || !USES_TO_LENGTH$6 }, {
-	  filter: function filter(callbackfn /* , thisArg */) {
-	    return $filter$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
+	        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.
 
-	var nativeReverse = [].reverse;
-	var test$1 = [1, 2];
+	        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.
 
-	// `Array.prototype.reverse` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.reverse
-	// fix for Safari 12.0 bug
-	// https://bugs.webkit.org/show_bug.cgi?id=188794
-	_export({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
-	  reverse: function reverse() {
-	    // eslint-disable-next-line no-self-assign
-	    if (isArray(this)) this.length = this.length;
-	    return nativeReverse.call(this);
-	  }
-	});
 
-	var FAILS_ON_PRIMITIVES$3 = fails(function () { objectKeys(1); });
+	      context.delegate = null;
+	      return ContinueSentinel;
+	    } // Define Generator.prototype.{next,throw,return} in terms of the
+	    // unified ._invoke helper method.
 
-	// `Object.keys` method
-	// https://tc39.github.io/ecma262/#sec-object.keys
-	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3 }, {
-	  keys: function keys(it) {
-	    return objectKeys(toObject(it));
-	  }
-	});
 
-	var trim = stringTrim.trim;
+	    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.
 
+	    define(Gp, iteratorSymbol, function () {
+	      return this;
+	    });
+	    define(Gp, "toString", function () {
+	      return "[object Generator]";
+	    });
 
-	var $parseFloat = global_1.parseFloat;
-	var FORCED$8 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;
+	    function pushTryEntry(locs) {
+	      var entry = {
+	        tryLoc: locs[0]
+	      };
 
-	// `parseFloat` method
-	// https://tc39.github.io/ecma262/#sec-parsefloat-string
-	var numberParseFloat = FORCED$8 ? function parseFloat(string) {
-	  var trimmedString = trim(String(string));
-	  var result = $parseFloat(trimmedString);
-	  return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
-	} : $parseFloat;
+	      if (1 in locs) {
+	        entry.catchLoc = locs[1];
+	      }
 
-	// `parseFloat` method
-	// https://tc39.github.io/ecma262/#sec-parsefloat-string
-	_export({ global: true, forced: parseFloat != numberParseFloat }, {
-	  parseFloat: numberParseFloat
-	});
+	      if (2 in locs) {
+	        entry.finallyLoc = locs[2];
+	        entry.afterLoc = locs[3];
+	      }
 
-	/*
-	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.)
+	      this.tryEntries.push(entry);
+	    }
 
-	In addition, numeric-valued `incline` tags are negated.
+	    function resetTryEntry(entry) {
+	      var record = entry.completion || {};
+	      record.type = "normal";
+	      delete record.arg;
+	      entry.completion = record;
+	    }
 
-	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.
+	    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);
+	    }
 
-	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];
+	    exports.keys = function (object) {
+	      var keys = [];
 
-	      if (replacement[0].test(key)) {
-	        return key.replace(replacement[0], replacement[1]);
+	      for (var key in object) {
+	        keys.push(key);
 	      }
-	    }
-
-	    return key;
-	  }
-
-	  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;
-	        }
+	      keys.reverse(); // Rather than returning an object with a next method, we keep
+	      // things simple and return the next function itself.
 
-	        return degrees.toString();
-	      }
-	    }
+	      return function next() {
+	        while (keys.length) {
+	          var key = keys.pop();
 
-	    return valueReplacements[value] || value;
-	  } // Reverse the direction of tags attached to the nodes - #3076
+	          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.
 
 
-	  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 = {};
+	        next.done = true;
+	        return next;
+	      };
+	    };
 
-	      for (var key in node.tags) {
-	        tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
-	      }
+	    function values(iterable) {
+	      if (iterable) {
+	        var iteratorMethod = iterable[iteratorSymbol];
 
-	      graph = graph.replace(node.update({
-	        tags: tags
-	      }));
-	    }
+	        if (iteratorMethod) {
+	          return iteratorMethod.call(iterable);
+	        }
 
-	    return graph;
-	  }
+	        if (typeof iterable.next === "function") {
+	          return iterable;
+	        }
 
-	  function reverseWay(graph, way) {
-	    var nodes = way.nodes.slice().reverse();
-	    var tags = {};
-	    var role;
+	        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;
+	              }
+	            }
 
-	    for (var key in way.tags) {
-	      tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
-	    }
+	            next.value = undefined$1;
+	            next.done = true;
+	            return next;
+	          };
 
-	    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);
+	          return next.next = next;
 	        }
-	      });
-	    }); // 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
-	    }));
-	  }
+	      } // Return an iterator with no values.
 
-	  var action = function action(graph) {
-	    var entity = graph.entity(entityID);
 
-	    if (entity.type === 'way') {
-	      return reverseWay(graph, entity);
+	      return {
+	        next: doneResult
+	      };
 	    }
 
-	    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];
+	    exports.values = values;
 
-	      if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
-	        return false;
-	      }
+	    function doneResult() {
+	      return {
+	        value: undefined$1,
+	        done: true
+	      };
 	    }
 
-	    return 'nondirectional_node';
-	  };
-
-	  action.entityID = function () {
-	    return entityID;
-	  };
+	    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.
 
-	  return action;
-	}
+	        this.sent = this._sent = undefined$1;
+	        this.done = false;
+	        this.delegate = null;
+	        this.method = "next";
+	        this.arg = undefined$1;
+	        this.tryEntries.forEach(resetTryEntry);
 
-	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
+	        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 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
+	        if (rootRecord.type === "throw") {
+	          throw rootRecord.arg;
+	        }
 
-	  var lineKeys = {
-	    highway: {
-	      rest_area: true,
-	      services: true
-	    },
-	    railway: {
-	      roundhouse: true,
-	      station: true,
-	      traverser: true,
-	      turntable: true,
-	      wash: true
-	    }
-	  };
-	  var returnTags = {};
+	        return this.rval;
+	      },
+	      dispatchException: function dispatchException(exception) {
+	        if (this.done) {
+	          throw exception;
+	        }
 
-	  for (var key in tags) {
-	    if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
-	      returnTags[key] = tags[key];
-	      return returnTags;
-	    }
+	        var context = this;
 
-	    if (key in lineKeys && tags[key] in lineKeys[key]) {
-	      returnTags[key] = tags[key];
-	      return returnTags;
-	    }
-	  }
+	        function handle(loc, caught) {
+	          record.type = "throw";
+	          record.arg = exception;
+	          context.next = loc;
 
-	  return null;
-	} // Tags that indicate a node can be a standalone point
-	// e.g. { amenity: { bar: true, parking: true, ... } ... }
+	          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;
+	          }
 
-	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 ... } ... }
+	          return !!caught;
+	        }
 
-	var osmVertexTags = {};
-	function osmSetVertexTags(value) {
-	  osmVertexTags = value;
-	}
-	function osmNodeGeometriesForTags(nodeTags) {
-	  var geometries = {};
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+	          var record = entry.completion;
 
-	  for (var key in nodeTags) {
-	    if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
-	      geometries.point = true;
-	    }
+	          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");
+	          }
 
-	    if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
-	      geometries.vertex = true;
-	    } // break early if both are already supported
+	          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];
 
-	    if (geometries.point && geometries.vertex) break;
-	  }
+	          if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
+	            var finallyEntry = entry;
+	            break;
+	          }
+	        }
 
-	  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
+	        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;
+	        }
 
-	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
+	        var record = finallyEntry ? finallyEntry.completion : {};
+	        record.type = type;
+	        record.arg = arg;
 
-	var osmSemipavedTags = {
-	  'surface': {
-	    'cobblestone': true,
-	    'cobblestone:flattened': true,
-	    'unhewn_cobblestone': true,
-	    'sett': true,
-	    'paving_stones': true,
-	    'metal': true,
-	    'wood': true
-	  }
-	};
-	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`)
+	        if (finallyEntry) {
+	          this.method = "next";
+	          this.next = finallyEntry.finallyLoc;
+	          return ContinueSentinel;
+	        }
 
-	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
+	        return this.complete(record);
+	      },
+	      complete: function complete(record, afterLoc) {
+	        if (record.type === "throw") {
+	          throw record.arg;
+	        }
 
-	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')
+	        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;
+	        }
 
-	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
+	        return ContinueSentinel;
+	      },
+	      finish: function finish(finallyLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
 
-	var osmFlowingWaterwayTagValues = {
-	  canal: true,
-	  ditch: true,
-	  drain: true,
-	  fish_pass: true,
-	  river: true,
-	  stream: true,
-	  tidal_channel: true
-	};
+	          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];
 
-	var trim$1 = stringTrim.trim;
+	          if (entry.tryLoc === tryLoc) {
+	            var record = entry.completion;
 
+	            if (record.type === "throw") {
+	              var thrown = record.arg;
+	              resetTryEntry(entry);
+	            }
 
-	var $parseInt = global_1.parseInt;
-	var hex$1 = /^[+-]?0[Xx]/;
-	var FORCED$9 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
+	            return thrown;
+	          }
+	        } // The context.catch method must only be called with a location
+	        // argument that corresponds to a known catch block.
 
-	// `parseInt` method
-	// https://tc39.github.io/ecma262/#sec-parseint-string-radix
-	var numberParseInt = FORCED$9 ? function parseInt(string, radix) {
-	  var S = trim$1(String(string));
-	  return $parseInt(S, (radix >>> 0) || (hex$1.test(S) ? 16 : 10));
-	} : $parseInt;
 
-	// `parseInt` method
-	// https://tc39.github.io/ecma262/#sec-parseint-string-radix
-	_export({ global: true, forced: parseInt != numberParseInt }, {
-	  parseInt: numberParseInt
-	});
+	        throw new Error("illegal catch attempt");
+	      },
+	      delegateYield: function delegateYield(iterable, resultName, nextLoc) {
+	        this.delegate = {
+	          iterator: values(iterable),
+	          resultName: resultName,
+	          nextLoc: nextLoc
+	        };
 
-	var freezing = !fails(function () {
-	  return Object.isExtensible(Object.preventExtensions({}));
-	});
+	        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;
+	        }
 
-	var internalMetadata = createCommonjsModule(function (module) {
-	var defineProperty = objectDefineProperty.f;
+	        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 );
 
+	  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, in modern engines
+	    // we can explicitly access globalThis. In older engines 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.
+	    if ((typeof globalThis === "undefined" ? "undefined" : _typeof(globalThis)) === "object") {
+	      globalThis.regeneratorRuntime = runtime;
+	    } else {
+	      Function("r", "regeneratorRuntime = r")(runtime);
+	    }
+	  }
+	})(runtime);
 
-	var METADATA = uid('meta');
-	var id = 0;
+	var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);
 
-	var isExtensible = Object.isExtensible || function () {
-	  return true;
-	};
+	function number$1 (x) {
+	  return x === null ? NaN : +x;
+	}
+	function numbers(values, valueof) {
+	  var _iterator, _step, value, index, _iterator2, _step2, _value;
 
-	var setMetadata = function (it) {
-	  defineProperty(it, METADATA, { value: {
-	    objectID: 'O' + ++id, // object ID
-	    weakData: {}          // weak collections IDs
-	  } });
-	};
+	  return regeneratorRuntime.wrap(function numbers$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          if (!(valueof === undefined)) {
+	            _context.next = 21;
+	            break;
+	          }
 
-	var fastKey = function (it, create) {
-	  // return a primitive with prefix
-	  if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
-	  if (!has(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;
-	};
+	          _iterator = _createForOfIteratorHelper(values);
+	          _context.prev = 2;
 
-	var getWeakData = function (it, create) {
-	  if (!has(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;
-	};
+	          _iterator.s();
 
-	// add metadata on freeze-family methods calling
-	var onFreeze = function (it) {
-	  if (freezing && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);
-	  return it;
-	};
+	        case 4:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 11;
+	            break;
+	          }
 
-	var meta = module.exports = {
-	  REQUIRED: false,
-	  fastKey: fastKey,
-	  getWeakData: getWeakData,
-	  onFreeze: onFreeze
-	};
+	          value = _step.value;
 
-	hiddenKeys[METADATA] = true;
-	});
+	          if (!(value != null && (value = +value) >= value)) {
+	            _context.next = 9;
+	            break;
+	          }
 
-	var collection = 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_1[CONSTRUCTOR_NAME];
-	  var NativePrototype = NativeConstructor && NativeConstructor.prototype;
-	  var Constructor = NativeConstructor;
-	  var exported = {};
+	          _context.next = 9;
+	          return value;
 
-	  var fixMethod = function (KEY) {
-	    var nativeMethod = NativePrototype[KEY];
-	    redefine(NativePrototype, KEY,
-	      KEY == 'add' ? function add(value) {
-	        nativeMethod.call(this, value === 0 ? 0 : value);
-	        return this;
-	      } : KEY == 'delete' ? function (key) {
-	        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
-	      } : KEY == 'get' ? function get(key) {
-	        return IS_WEAK && !isObject(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);
-	      } : KEY == 'has' ? function has(key) {
-	        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
-	      } : function set(key, value) {
-	        nativeMethod.call(this, key === 0 ? 0 : key, value);
-	        return this;
-	      }
-	    );
-	  };
+	        case 9:
+	          _context.next = 4;
+	          break;
 
-	  // eslint-disable-next-line max-len
-	  if (isForced_1(CONSTRUCTOR_NAME, typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
-	    new NativeConstructor().entries().next();
-	  })))) {
-	    // create collection constructor
-	    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
-	    internalMetadata.REQUIRED = true;
-	  } else if (isForced_1(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(function () { instance.has(1); });
-	    // most early implementations doesn't supports iterables, most modern - not close it correctly
-	    // eslint-disable-next-line no-new
-	    var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });
-	    // for early implementations -0 and +0 not the same
-	    var BUGGY_ZERO = !IS_WEAK && fails(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);
-	    });
+	        case 11:
+	          _context.next = 16;
+	          break;
 
-	    if (!ACCEPT_ITERABLES) {
-	      Constructor = wrapper(function (dummy, iterable) {
-	        anInstance(dummy, Constructor, CONSTRUCTOR_NAME);
-	        var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);
-	        if (iterable != undefined) iterate_1(iterable, that[ADDER], that, IS_MAP);
-	        return that;
-	      });
-	      Constructor.prototype = NativePrototype;
-	      NativePrototype.constructor = Constructor;
-	    }
+	        case 13:
+	          _context.prev = 13;
+	          _context.t0 = _context["catch"](2);
 
-	    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
-	      fixMethod('delete');
-	      fixMethod('has');
-	      IS_MAP && fixMethod('get');
-	    }
+	          _iterator.e(_context.t0);
 
-	    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
+	        case 16:
+	          _context.prev = 16;
 
-	    // weak collections should not contains .clear method
-	    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
-	  }
+	          _iterator.f();
 
-	  exported[CONSTRUCTOR_NAME] = Constructor;
-	  _export({ global: true, forced: Constructor != NativeConstructor }, exported);
+	          return _context.finish(16);
 
-	  setToStringTag(Constructor, CONSTRUCTOR_NAME);
+	        case 19:
+	          _context.next = 40;
+	          break;
 
-	  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
+	        case 21:
+	          index = -1;
+	          _iterator2 = _createForOfIteratorHelper(values);
+	          _context.prev = 23;
 
-	  return Constructor;
-	};
+	          _iterator2.s();
 
-	var defineProperty$8 = objectDefineProperty.f;
+	        case 25:
+	          if ((_step2 = _iterator2.n()).done) {
+	            _context.next = 32;
+	            break;
+	          }
 
+	          _value = _step2.value;
 
+	          if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
+	            _context.next = 30;
+	            break;
+	          }
 
+	          _context.next = 30;
+	          return _value;
 
+	        case 30:
+	          _context.next = 25;
+	          break;
 
+	        case 32:
+	          _context.next = 37;
+	          break;
 
+	        case 34:
+	          _context.prev = 34;
+	          _context.t1 = _context["catch"](23);
 
+	          _iterator2.e(_context.t1);
 
-	var fastKey = internalMetadata.fastKey;
+	        case 37:
+	          _context.prev = 37;
 
+	          _iterator2.f();
 
-	var setInternalState$7 = internalState.set;
-	var internalStateGetterFor = internalState.getterFor;
+	          return _context.finish(37);
 
-	var collectionStrong = {
-	  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
-	    var C = wrapper(function (that, iterable) {
-	      anInstance(that, C, CONSTRUCTOR_NAME);
-	      setInternalState$7(that, {
-	        type: CONSTRUCTOR_NAME,
-	        index: objectCreate(null),
-	        first: undefined,
-	        last: undefined,
-	        size: 0
-	      });
-	      if (!descriptors) that.size = 0;
-	      if (iterable != undefined) iterate_1(iterable, that[ADDER], that, IS_MAP);
-	    });
+	        case 40:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
+	}
 
-	    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
+	var ascendingBisect = d3_bisector(d3_ascending);
+	var bisectRight = ascendingBisect.right;
+	d3_bisector(number$1).center;
 
-	    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) state.size++;
-	        else that.size++;
-	        // add to index
-	        if (index !== 'F') state.index[index] = entry;
-	      } return that;
-	    };
+	var anObject$2 = anObject$n;
+	var iteratorClose = iteratorClose$2;
 
-	    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;
-	      }
-	    };
+	// call something on iterator step with safe closing on error
+	var callWithSafeIterationClosing$1 = function (iterator, fn, value, ENTRIES) {
+	  try {
+	    return ENTRIES ? fn(anObject$2(value)[0], value[1]) : fn(value);
+	  } catch (error) {
+	    iteratorClose(iterator, 'throw', error);
+	  }
+	};
 
-	    redefineAll(C.prototype, {
-	      // 23.1.3.1 Map.prototype.clear()
-	      // 23.2.3.2 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) state.size = 0;
-	        else that.size = 0;
-	      },
-	      // 23.1.3.3 Map.prototype.delete(key)
-	      // 23.2.3.4 Set.prototype.delete(value)
-	      '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) state.size--;
-	          else that.size--;
-	        } return !!entry;
-	      },
-	      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
-	      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
-	      forEach: function forEach(callbackfn /* , that = undefined */) {
-	        var state = getInternalState(this);
-	        var boundFunction = functionBindContext(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;
-	        }
-	      },
-	      // 23.1.3.7 Map.prototype.has(key)
-	      // 23.2.3.7 Set.prototype.has(value)
-	      has: function has(key) {
-	        return !!getEntry(this, key);
-	      }
-	    });
+	var global$c = global$1o;
+	var bind$5 = functionBindContext;
+	var call$3 = functionCall;
+	var toObject$3 = toObject$i;
+	var callWithSafeIterationClosing = callWithSafeIterationClosing$1;
+	var isArrayIteratorMethod = isArrayIteratorMethod$3;
+	var isConstructor = isConstructor$4;
+	var lengthOfArrayLike$3 = lengthOfArrayLike$i;
+	var createProperty = createProperty$5;
+	var getIterator = getIterator$4;
+	var getIteratorMethod = getIteratorMethod$5;
 
-	    redefineAll(C.prototype, IS_MAP ? {
-	      // 23.1.3.6 Map.prototype.get(key)
-	      get: function get(key) {
-	        var entry = getEntry(this, key);
-	        return entry && entry.value;
-	      },
-	      // 23.1.3.9 Map.prototype.set(key, value)
-	      set: function set(key, value) {
-	        return define(this, key === 0 ? 0 : key, value);
-	      }
-	    } : {
-	      // 23.2.3.1 Set.prototype.add(value)
-	      add: function add(value) {
-	        return define(this, value = value === 0 ? 0 : value, value);
-	      }
-	    });
-	    if (descriptors) defineProperty$8(C.prototype, 'size', {
-	      get: function () {
-	        return getInternalState(this).size;
-	      }
-	    });
-	    return C;
-	  },
-	  setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
-	    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
-	    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
-	    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
-	    // add .keys, .values, .entries, [@@iterator]
-	    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11
-	    defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
-	      setInternalState$7(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);
+	var Array$1 = global$c.Array;
 
-	    // add [@@species], 23.1.2.2, 23.2.2.2
-	    setSpecies(CONSTRUCTOR_NAME);
+	// `Array.from` method implementation
+	// https://tc39.es/ecma262/#sec-array.from
+	var arrayFrom$1 = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+	  var O = toObject$3(arrayLike);
+	  var IS_CONSTRUCTOR = isConstructor(this);
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  if (mapping) mapfn = bind$5(mapfn, argumentsLength > 2 ? arguments[2] : undefined);
+	  var iteratorMethod = getIteratorMethod(O);
+	  var index = 0;
+	  var length, result, step, iterator, next, value;
+	  // if the target is not iterable or it's an array with the default iterator - use a simple case
+	  if (iteratorMethod && !(this == Array$1 && isArrayIteratorMethod(iteratorMethod))) {
+	    iterator = getIterator(O, iteratorMethod);
+	    next = iterator.next;
+	    result = IS_CONSTRUCTOR ? new this() : [];
+	    for (;!(step = call$3(next, iterator)).done; index++) {
+	      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
+	      createProperty(result, index, value);
+	    }
+	  } else {
+	    length = lengthOfArrayLike$3(O);
+	    result = IS_CONSTRUCTOR ? new this(length) : Array$1(length);
+	    for (;length > index; index++) {
+	      value = mapping ? mapfn(O[index], index) : O[index];
+	      createProperty(result, index, value);
+	    }
 	  }
+	  result.length = index;
+	  return result;
 	};
 
-	// `Set` constructor
-	// https://tc39.github.io/ecma262/#sec-set-objects
-	var es_set = collection('Set', function (init) {
-	  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
-	}, collectionStrong);
+	var $$D = _export;
+	var from = arrayFrom$1;
+	var checkCorrectnessOfIteration = checkCorrectnessOfIteration$4;
 
-	function d3_ascending (a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-	}
+	var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
+	  // eslint-disable-next-line es/no-array-from -- required for testing
+	  Array.from(iterable);
+	});
 
-	function d3_bisector (f) {
-	  var delta = f;
-	  var compare = f;
+	// `Array.from` method
+	// https://tc39.es/ecma262/#sec-array.from
+	$$D({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
+	  from: from
+	});
 
-	  if (f.length === 1) {
-	    delta = function delta(d, x) {
-	      return f(d) - x;
-	    };
+	var $$C = _export;
+	var fill = arrayFill$1;
+	var addToUnscopables$4 = addToUnscopables$6;
 
-	    compare = ascendingComparator(f);
-	  }
+	// `Array.prototype.fill` method
+	// https://tc39.es/ecma262/#sec-array.prototype.fill
+	$$C({ target: 'Array', proto: true }, {
+	  fill: fill
+	});
 
-	  function left(a, x, lo, hi) {
-	    if (lo == null) lo = 0;
-	    if (hi == null) hi = a.length;
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$4('fill');
 
-	    while (lo < hi) {
-	      var mid = lo + hi >>> 1;
-	      if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
-	    }
+	var $$B = _export;
+	var $some = arrayIteration.some;
+	var arrayMethodIsStrict$4 = arrayMethodIsStrict$9;
 
-	    return lo;
-	  }
+	var STRICT_METHOD$4 = arrayMethodIsStrict$4('some');
 
-	  function right(a, x, lo, hi) {
-	    if (lo == null) lo = 0;
-	    if (hi == null) hi = a.length;
+	// `Array.prototype.some` method
+	// https://tc39.es/ecma262/#sec-array.prototype.some
+	$$B({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 }, {
+	  some: function some(callbackfn /* , thisArg */) {
+	    return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	    while (lo < hi) {
-	      var mid = lo + hi >>> 1;
-	      if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
-	    }
+	var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = typedArrayConstructorsRequireWrappers;
+	var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;
+	var typedArrayFrom = typedArrayFrom$2;
 
-	    return lo;
-	  }
+	// `%TypedArray%.from` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.from
+	exportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);
 
-	  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;
-	  }
+	var createTypedArrayConstructor = typedArrayConstructor.exports;
 
-	  return {
-	    left: left,
-	    center: center,
-	    right: right
+	// `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);
 	  };
-	}
+	});
 
-	function ascendingComparator(f) {
-	  return function (d, x) {
-	    return d3_ascending(f(d), x);
-	  };
+	function d3_descending (a, b) {
+	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
 	}
 
-	// `Symbol.asyncIterator` well-known symbol
-	// https://tc39.github.io/ecma262/#sec-symbol.asynciterator
-	defineWellKnownSymbol('asyncIterator');
+	// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
+	var Adder = /*#__PURE__*/function () {
+	  function Adder() {
+	    _classCallCheck$1(this, Adder);
 
-	var runtime_1 = createCommonjsModule(function (module) {
-	  /**
-	   * Copyright (c) 2014-present, Facebook, Inc.
-	   *
-	   * This source code is licensed under the MIT license found in the
-	   * LICENSE file in the root directory of this source tree.
-	   */
-	  var runtime = function (exports) {
+	    this._partials = new Float64Array(32);
+	    this._n = 0;
+	  }
 
-	    var Op = Object.prototype;
-	    var hasOwn = Op.hasOwnProperty;
-	    var undefined$1; // More compressible than void 0.
+	  _createClass$1(Adder, [{
+	    key: "add",
+	    value: function add(x) {
+	      var p = this._partials;
+	      var i = 0;
 
-	    var $Symbol = typeof Symbol === "function" ? Symbol : {};
-	    var iteratorSymbol = $Symbol.iterator || "@@iterator";
-	    var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
-	    var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
+	      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;
+	      }
 
-	    function define(obj, key, value) {
-	      Object.defineProperty(obj, key, {
-	        value: value,
-	        enumerable: true,
-	        configurable: true,
-	        writable: true
-	      });
-	      return obj[key];
+	      p[i] = x;
+	      this._n = i + 1;
+	      return this;
 	    }
+	  }, {
+	    key: "valueOf",
+	    value: function valueOf() {
+	      var p = this._partials;
+	      var n = this._n,
+	          x,
+	          y,
+	          lo,
+	          hi = 0;
 
-	    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;
-	      };
-	    }
+	      if (n > 0) {
+	        hi = p[--n];
 
-	    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.
+	        while (n > 0) {
+	          x = hi;
+	          y = p[--n];
+	          hi = x + y;
+	          lo = y - (hi - x);
+	          if (lo) break;
+	        }
 
-	      generator._invoke = makeInvokeMethod(innerFn, self, context);
-	      return generator;
+	        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 hi;
 	    }
+	  }]);
 
-	    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.
+	  return Adder;
+	}();
 
-	    function tryCatch(fn, obj, arg) {
-	      try {
-	        return {
-	          type: "normal",
-	          arg: fn.call(obj, arg)
-	        };
-	      } catch (err) {
-	        return {
-	          type: "throw",
-	          arg: err
-	        };
-	      }
-	    }
+	var $$A = _export;
+	var DESCRIPTORS$5 = descriptors;
+	var defineProperties$1 = objectDefineProperties.f;
 
-	    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.
+	// `Object.defineProperties` method
+	// https://tc39.es/ecma262/#sec-object.defineproperties
+	// eslint-disable-next-line es/no-object-defineproperties -- safe
+	$$A({ target: 'Object', stat: true, forced: Object.defineProperties !== defineProperties$1, sham: !DESCRIPTORS$5 }, {
+	  defineProperties: defineProperties$1
+	});
 
-	    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.
+	var collection = collection$2;
+	var collectionStrong = collectionStrong$2;
 
-	    function Generator() {}
+	// `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);
 
-	    function GeneratorFunction() {}
+	var $$z = _export;
+	var uncurryThis$f = functionUncurryThis;
+	var aCallable$1 = aCallable$a;
+	var toObject$2 = toObject$i;
+	var lengthOfArrayLike$2 = lengthOfArrayLike$i;
+	var toString$a = toString$k;
+	var fails$b = fails$V;
+	var internalSort = arraySort$1;
+	var arrayMethodIsStrict$3 = arrayMethodIsStrict$9;
+	var FF = engineFfVersion;
+	var IE_OR_EDGE = engineIsIeOrEdge;
+	var V8 = engineV8Version;
+	var WEBKIT = engineWebkitVersion;
+
+	var test = [];
+	var un$Sort = uncurryThis$f(test.sort);
+	var push$3 = uncurryThis$f(test.push);
 
-	    function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
-	    // don't natively support it.
+	// 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$3 = arrayMethodIsStrict$3('sort');
 
+	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 IteratorPrototype = {};
+	  var result = '';
+	  var code, chr, value, index;
 
-	    IteratorPrototype[iteratorSymbol] = function () {
-	      return this;
-	    };
+	  // 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);
 
-	    var getProto = Object.getPrototypeOf;
-	    var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
+	    switch (code) {
+	      case 66: case 69: case 70: case 72: value = 3; break;
+	      case 68: case 71: value = 4; break;
+	      default: value = 2;
+	    }
 
-	    if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
-	      // This environment has a native %IteratorPrototype%; use it instead
-	      // of the polyfill.
-	      IteratorPrototype = NativeIteratorPrototype;
+	    for (index = 0; index < 47; index++) {
+	      test.push({ k: chr + index, v: value });
 	    }
+	  }
 
-	    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.
+	  test.sort(function (a, b) { return b.v - a.v; });
 
-	    function defineIteratorMethods(prototype) {
-	      ["next", "throw", "return"].forEach(function (method) {
-	        define(prototype, method, function (arg) {
-	          return this._invoke(method, arg);
-	        });
-	      });
-	    }
+	  for (index = 0; index < test.length; index++) {
+	    chr = test[index].k.charAt(0);
+	    if (result.charAt(result.length - 1) !== chr) result += chr;
+	  }
 
-	    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;
-	    };
+	  return result !== 'DGBEFHACIJK';
+	});
 
-	    exports.mark = function (genFun) {
-	      if (Object.setPrototypeOf) {
-	        Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
-	      } else {
-	        genFun.__proto__ = GeneratorFunctionPrototype;
-	        define(genFun, toStringTagSymbol, "GeneratorFunction");
-	      }
+	var FORCED$7 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$3 || !STABLE_SORT;
 
-	      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.
+	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 toString$a(x) > toString$a(y) ? 1 : -1;
+	  };
+	};
 
+	// `Array.prototype.sort` method
+	// https://tc39.es/ecma262/#sec-array.prototype.sort
+	$$z({ target: 'Array', proto: true, forced: FORCED$7 }, {
+	  sort: function sort(comparefn) {
+	    if (comparefn !== undefined) aCallable$1(comparefn);
 
-	    exports.awrap = function (arg) {
-	      return {
-	        __await: arg
-	      };
-	    };
+	    var array = toObject$2(this);
 
-	    function AsyncIterator(generator, PromiseImpl) {
-	      function invoke(method, arg, resolve, reject) {
-	        var record = tryCatch(generator[method], generator, arg);
+	    if (STABLE_SORT) return comparefn === undefined ? un$Sort(array) : un$Sort(array, comparefn);
 
-	        if (record.type === "throw") {
-	          reject(record.arg);
-	        } else {
-	          var result = record.arg;
-	          var value = result.value;
+	    var items = [];
+	    var arrayLength = lengthOfArrayLike$2(array);
+	    var itemsLength, index;
 
-	          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);
-	            });
-	          }
+	    for (index = 0; index < arrayLength; index++) {
+	      if (index in array) push$3(items, array[index]);
+	    }
 
-	          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);
-	          });
-	        }
-	      }
+	    internalSort(items, getSortCompare(comparefn));
 
-	      var previousPromise;
+	    itemsLength = items.length;
+	    index = 0;
 
-	      function enqueue(method, arg) {
-	        function callInvokeWithMethodAndArg() {
-	          return new PromiseImpl(function (resolve, reject) {
-	            invoke(method, arg, resolve, reject);
-	          });
-	        }
+	    while (index < itemsLength) array[index] = items[index++];
+	    while (index < arrayLength) delete array[index++];
 
-	        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).
+	    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);
 
-	      this._invoke = enqueue;
+	    while (++i < n) {
+	      ticks[i] = (r0 + i) * step;
 	    }
+	  } else {
+	    step = -step;
 
-	    defineIteratorMethods(AsyncIterator.prototype);
+	    var _r = Math.round(start * step),
+	        _r2 = Math.round(stop * step);
 
-	    AsyncIterator.prototype[asyncIteratorSymbol] = function () {
-	      return this;
-	    };
+	    if (_r / step < start) ++_r;
+	    if (_r2 / step > stop) --_r2;
+	    ticks = new Array(n = _r2 - _r + 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.
+	    while (++i < n) {
+	      ticks[i] = (_r + i) / step;
+	    }
+	  }
 
-	    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();
-	      });
-	    };
+	  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 makeInvokeMethod(innerFn, self, context) {
-	      var state = GenStateSuspendedStart;
-	      return function invoke(method, arg) {
-	        if (state === GenStateExecuting) {
-	          throw new Error("Generator is already running");
-	        }
+	function max(values, valueof) {
+	  var max;
 
-	        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
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
 
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
 
-	          return doneResult();
+	        if (value != null && (max < value || max === undefined && value >= value)) {
+	          max = value;
 	        }
+	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
+	    }
+	  } else {
+	    var index = -1;
 
-	        context.method = method;
-	        context.arg = arg;
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
 
-	        while (true) {
-	          var delegate = context.delegate;
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
 
-	          if (delegate) {
-	            var delegateResult = maybeInvokeDelegate(delegate, context);
+	        if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
+	          max = _value;
+	        }
+	      }
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
+	    }
+	  }
 
-	            if (delegateResult) {
-	              if (delegateResult === ContinueSentinel) continue;
-	              return delegateResult;
-	            }
-	          }
+	  return max;
+	}
 
-	          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 min$2(values, valueof) {
+	  var min;
 
-	            context.dispatchException(context.arg);
-	          } else if (context.method === "return") {
-	            context.abrupt("return", context.arg);
-	          }
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
 
-	          state = GenStateExecuting;
-	          var record = tryCatch(innerFn, self, context);
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
 
-	          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;
+	        if (value != null && (min > value || min === undefined && value >= value)) {
+	          min = value;
+	        }
+	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
+	    }
+	  } else {
+	    var index = -1;
 
-	            if (record.arg === ContinueSentinel) {
-	              continue;
-	            }
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
 
-	            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.
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
 
-	            context.method = "throw";
-	            context.arg = record.arg;
-	          }
+	        if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
+	          min = _value;
 	        }
-	      };
-	    } // 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.
+	      }
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
+	    }
+	  }
 
+	  return min;
+	}
 
-	    function maybeInvokeDelegate(delegate, context) {
-	      var method = delegate.iterator[context.method];
+	// ISC license, Copyright 2018 Vladimir Agafonkin.
 
-	      if (method === undefined$1) {
-	        // A .throw or .return when the delegate iterator has no .throw
-	        // method always terminates the yield* loop.
-	        context.delegate = null;
+	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;
 
-	        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);
+	  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);
+	    }
 
-	            if (context.method === "throw") {
-	              // If maybeInvokeDelegate(context) changed context.method from
-	              // "return" to "throw", let that override the TypeError below.
-	              return ContinueSentinel;
-	            }
-	          }
+	    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);
 
-	          context.method = "throw";
-	          context.arg = new TypeError("The iterator does not provide a 'throw' method");
-	        }
+	    while (i < j) {
+	      swap$1(array, i, j), ++i, --j;
 
-	        return ContinueSentinel;
+	      while (compare(array[i], t) < 0) {
+	        ++i;
 	      }
 
-	      var record = tryCatch(method, delegate.iterator, context.arg);
-
-	      if (record.type === "throw") {
-	        context.method = "throw";
-	        context.arg = record.arg;
-	        context.delegate = null;
-	        return ContinueSentinel;
+	      while (compare(array[j], t) > 0) {
+	        --j;
 	      }
+	    }
 
-	      var info = record.arg;
+	    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;
+	  }
 
-	      if (!info) {
-	        context.method = "throw";
-	        context.arg = new TypeError("iterator result is not an object");
-	        context.delegate = null;
-	        return ContinueSentinel;
-	      }
+	  return array;
+	}
 
-	      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).
+	function swap$1(array, i, j) {
+	  var t = array[i];
+	  array[i] = array[j];
+	  array[j] = t;
+	}
 
-	        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.
+	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);
+	}
 
-	        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.
+	function d3_median (values, valueof) {
+	  return quantile(values, 0.5, valueof);
+	}
 
+	var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
 
-	      context.delegate = null;
-	      return ContinueSentinel;
-	    } // Define Generator.prototype.{next,throw,return} in terms of the
-	    // unified ._invoke helper method.
+	function flatten(arrays) {
+	  var _iterator, _step, array;
 
+	  return regeneratorRuntime.wrap(function flatten$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          _iterator = _createForOfIteratorHelper(arrays);
+	          _context.prev = 1;
 
-	    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.
+	          _iterator.s();
 
-	    Gp[iteratorSymbol] = function () {
-	      return this;
-	    };
+	        case 3:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 8;
+	            break;
+	          }
 
-	    Gp.toString = function () {
-	      return "[object Generator]";
-	    };
+	          array = _step.value;
+	          return _context.delegateYield(array, "t0", 6);
 
-	    function pushTryEntry(locs) {
-	      var entry = {
-	        tryLoc: locs[0]
-	      };
+	        case 6:
+	          _context.next = 3;
+	          break;
 
-	      if (1 in locs) {
-	        entry.catchLoc = locs[1];
-	      }
+	        case 8:
+	          _context.next = 13;
+	          break;
 
-	      if (2 in locs) {
-	        entry.finallyLoc = locs[2];
-	        entry.afterLoc = locs[3];
-	      }
+	        case 10:
+	          _context.prev = 10;
+	          _context.t1 = _context["catch"](1);
 
-	      this.tryEntries.push(entry);
-	    }
+	          _iterator.e(_context.t1);
 
-	    function resetTryEntry(entry) {
-	      var record = entry.completion || {};
-	      record.type = "normal";
-	      delete record.arg;
-	      entry.completion = record;
-	    }
+	        case 13:
+	          _context.prev = 13;
 
-	    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);
-	    }
+	          _iterator.f();
 
-	    exports.keys = function (object) {
-	      var keys = [];
+	          return _context.finish(13);
 
-	      for (var key in object) {
-	        keys.push(key);
+	        case 16:
+	        case "end":
+	          return _context.stop();
 	      }
+	    }
+	  }, _marked$2, null, [[1, 10, 13, 16]]);
+	}
 
-	      keys.reverse(); // Rather than returning an object with a next method, we keep
-	      // things simple and return the next function itself.
+	function merge$4(arrays) {
+	  return Array.from(flatten(arrays));
+	}
 
-	      return function next() {
-	        while (keys.length) {
-	          var key = keys.pop();
+	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 (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.
+	  while (++i < n) {
+	    range[i] = start + i * step;
+	  }
 
+	  return range;
+	}
 
-	        next.done = true;
-	        return next;
-	      };
-	    };
+	// `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;
+	};
 
-	    function values(iterable) {
-	      if (iterable) {
-	        var iteratorMethod = iterable[iteratorSymbol];
+	var $$y = _export;
 
-	        if (iteratorMethod) {
-	          return iteratorMethod.call(iterable);
-	        }
+	// 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;
 
-	        if (typeof iterable.next === "function") {
-	          return iterable;
-	        }
+	// Chrome 77 bug
+	// https://bugs.chromium.org/p/v8/issues/detail?id=9546
+	var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
 
-	        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;
-	              }
-	            }
+	// `Math.hypot` method
+	// https://tc39.es/ecma262/#sec-math.hypot
+	$$y({ 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);
+	  }
+	});
 
-	            next.value = undefined$1;
-	            next.done = true;
-	            return next;
-	          };
+	// `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;
+	};
 
-	          return next.next = next;
-	        }
-	      } // Return an iterator with no values.
+	var $$x = _export;
+	var sign$1 = mathSign;
 
+	// `Math.sign` method
+	// https://tc39.es/ecma262/#sec-math.sign
+	$$x({ target: 'Math', stat: true }, {
+	  sign: sign$1
+	});
 
-	      return {
-	        next: doneResult
-	      };
+	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 asin(x) {
+	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
+	}
+
+	function noop$1() {}
+
+	function streamGeometry(geometry, stream) {
+	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+	    streamGeometryType[geometry.type](geometry, stream);
+	  }
+	}
+
+	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;
+
+	    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;
 
-	    exports.values = values;
+	    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 doneResult() {
-	      return {
-	        value: undefined$1,
-	        done: true
-	      };
+	    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;
 
-	    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.
+	    while (++i < n) {
+	      streamPolygon(coordinates[i], stream);
+	    }
+	  },
+	  GeometryCollection: function GeometryCollection(object, stream) {
+	    var geometries = object.geometries,
+	        i = -1,
+	        n = geometries.length;
 
-	        this.sent = this._sent = undefined$1;
-	        this.done = false;
-	        this.delegate = null;
-	        this.method = "next";
-	        this.arg = undefined$1;
-	        this.tryEntries.forEach(resetTryEntry);
+	    while (++i < n) {
+	      streamGeometry(geometries[i], stream);
+	    }
+	  }
+	};
 
-	        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 streamLine(coordinates, stream, closed) {
+	  var i = -1,
+	      n = coordinates.length - closed,
+	      coordinate;
+	  stream.lineStart();
 
-	        if (rootRecord.type === "throw") {
-	          throw rootRecord.arg;
-	        }
+	  while (++i < n) {
+	    coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+	  }
 
-	        return this.rval;
-	      },
-	      dispatchException: function dispatchException(exception) {
-	        if (this.done) {
-	          throw exception;
-	        }
+	  stream.lineEnd();
+	}
 
-	        var context = this;
+	function streamPolygon(coordinates, stream) {
+	  var i = -1,
+	      n = coordinates.length;
+	  stream.polygonStart();
 
-	        function handle(loc, caught) {
-	          record.type = "throw";
-	          record.arg = exception;
-	          context.next = loc;
+	  while (++i < n) {
+	    streamLine(coordinates[i], stream, 1);
+	  }
 
-	          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;
-	          }
+	  stream.polygonEnd();
+	}
 
-	          return !!caught;
-	        }
+	function d3_geoStream (object, stream) {
+	  if (object && streamObjectType.hasOwnProperty(object.type)) {
+	    streamObjectType[object.type](object, stream);
+	  } else {
+	    streamGeometry(object, stream);
+	  }
+	}
 
-	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
-	          var entry = this.tryEntries[i];
-	          var record = entry.completion;
+	var areaRingSum$1 = new Adder(); // hello?
 
-	          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");
-	          }
+	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);
+	  }
+	};
 
-	          if (entry.tryLoc <= this.prev) {
-	            var hasCatch = hasOwn.call(entry, "catchLoc");
-	            var hasFinally = hasOwn.call(entry, "finallyLoc");
+	function areaRingStart$1() {
+	  areaStream$1.point = areaPointFirst$1;
+	}
 
-	            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];
+	function areaRingEnd$1() {
+	  areaPoint$1(lambda00$1, phi00$1);
+	}
 
-	          if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
-	            var finallyEntry = entry;
-	            break;
-	          }
-	        }
+	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);
+	}
 
-	        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;
-	        }
+	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).
 
-	        var record = finallyEntry ? finallyEntry.completion : {};
-	        record.type = type;
-	        record.arg = arg;
+	  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.
 
-	        if (finallyEntry) {
-	          this.method = "next";
-	          this.next = finallyEntry.finallyLoc;
-	          return ContinueSentinel;
-	        }
+	  lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
+	}
 
-	        return this.complete(record);
-	      },
-	      complete: function complete(record, afterLoc) {
-	        if (record.type === "throw") {
-	          throw record.arg;
-	        }
+	function d3_geoArea (object) {
+	  areaSum$1 = new Adder();
+	  d3_geoStream(object, areaStream$1);
+	  return areaSum$1 * 2;
+	}
 
-	        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;
-	        }
+	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
 
-	        return ContinueSentinel;
-	      },
-	      finish: function finish(finallyLoc) {
-	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
-	          var entry = this.tryEntries[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
 
-	          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];
+	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;
+	}
 
-	          if (entry.tryLoc === tryLoc) {
-	            var record = entry.completion;
+	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);
+	  }
+	};
 
-	            if (record.type === "throw") {
-	              var thrown = record.arg;
-	              resetTryEntry(entry);
-	            }
+	function boundsPoint$1(lambda, phi) {
+	  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
+	}
 
-	            return thrown;
-	          }
-	        } // The context.catch method must only be called with a location
-	        // argument that corresponds to a known catch block.
+	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$1 * sign,
+	        phii,
+	        antimeridian = abs$2(delta) > 180;
 
-	        throw new Error("illegal catch attempt");
-	      },
-	      delegateYield: function delegateYield(iterable, resultName, nextLoc) {
-	        this.delegate = {
-	          iterator: values(iterable),
-	          resultName: resultName,
-	          nextLoc: nextLoc
-	        };
+	    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;
+	    }
 
-	        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;
+	    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;
 	        }
-
-	        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 );
-
-	  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);
+	    }
+	  } else {
+	    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
 	  }
-	});
 
-	var _marked = /*#__PURE__*/regeneratorRuntime.mark(numbers);
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
+	  p0 = p, lambda2 = lambda;
+	}
 
-	function number (x) {
-	  return x === null ? NaN : +x;
+	function boundsLineStart() {
+	  boundsStream$1.point = linePoint;
 	}
-	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;
-	          }
+	function boundsLineEnd() {
+	  range[0] = lambda0$1, range[1] = lambda1;
+	  boundsStream$1.point = boundsPoint$1;
+	  p0 = null;
+	}
 
-	          _iterator = _createForOfIteratorHelper(values);
-	          _context.prev = 2;
+	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;
+	  }
 
-	          _iterator.s();
+	  areaStream$1.point(lambda, phi);
+	  linePoint(lambda, phi);
+	}
 
-	        case 4:
-	          if ((_step = _iterator.n()).done) {
-	            _context.next = 11;
-	            break;
-	          }
+	function boundsRingStart() {
+	  areaStream$1.lineStart();
+	}
 
-	          value = _step.value;
+	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°.
 
-	          if (!(value != null && (value = +value) >= value)) {
-	            _context.next = 9;
-	            break;
-	          }
 
-	          _context.next = 9;
-	          return value;
+	function angle(lambda0, lambda1) {
+	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
+	}
 
-	        case 9:
-	          _context.next = 4;
-	          break;
+	function rangeCompare(a, b) {
+	  return a[0] - b[0];
+	}
 
-	        case 11:
-	          _context.next = 16;
-	          break;
+	function rangeContains(range, x) {
+	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
+	}
 
-	        case 13:
-	          _context.prev = 13;
-	          _context.t0 = _context["catch"](2);
+	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.
 
-	          _iterator.e(_context.t0);
+	  if (n = ranges.length) {
+	    ranges.sort(rangeCompare); // Then, merge any ranges that overlap.
 
-	        case 16:
-	          _context.prev = 16;
+	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+	      b = ranges[i];
 
-	          _iterator.f();
+	      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.
 
-	          return _context.finish(16);
 
-	        case 19:
-	          _context.next = 40;
-	          break;
+	    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];
+	    }
+	  }
 
-	        case 21:
-	          index = -1;
-	          _iterator2 = _createForOfIteratorHelper(values);
-	          _context.prev = 23;
+	  ranges = range = null;
+	  return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
+	}
 
-	          _iterator2.s();
+	function compose (a, b) {
+	  function compose(x, y) {
+	    return x = a(x, y), b(x[0], x[1]);
+	  }
 
-	        case 25:
-	          if ((_step2 = _iterator2.n()).done) {
-	            _context.next = 32;
-	            break;
-	          }
+	  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;
+	}
 
-	          _value = _step2.value;
+	function rotationIdentity(lambda, phi) {
+	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
+	}
 
-	          if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
-	            _context.next = 30;
-	            break;
-	          }
+	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;
+	}
 
-	          _context.next = 30;
-	          return _value;
+	function forwardRotationLambda(deltaLambda) {
+	  return function (lambda, phi) {
+	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
+	  };
+	}
 
-	        case 30:
-	          _context.next = 25;
-	          break;
+	function rotationLambda(deltaLambda) {
+	  var rotation = forwardRotationLambda(deltaLambda);
+	  rotation.invert = forwardRotationLambda(-deltaLambda);
+	  return rotation;
+	}
 
-	        case 32:
-	          _context.next = 37;
-	          break;
+	function rotationPhiGamma(deltaPhi, deltaGamma) {
+	  var cosDeltaPhi = cos(deltaPhi),
+	      sinDeltaPhi = sin(deltaPhi),
+	      cosDeltaGamma = cos(deltaGamma),
+	      sinDeltaGamma = sin(deltaGamma);
 
-	        case 34:
-	          _context.prev = 34;
-	          _context.t1 = _context["catch"](23);
+	  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)];
+	  }
 
-	          _iterator2.e(_context.t1);
+	  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)];
+	  };
 
-	        case 37:
-	          _context.prev = 37;
+	  return rotation;
+	}
 
-	          _iterator2.f();
+	function rotation (rotate) {
+	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
 
-	          return _context.finish(37);
+	  function forward(coordinates) {
+	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+	  }
 
-	        case 40:
-	        case "end":
-	          return _context.stop();
-	      }
-	    }
-	  }, _marked, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
+	  forward.invert = function (coordinates) {
+	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+	  };
+
+	  return forward;
 	}
 
-	var ascendingBisect = d3_bisector(d3_ascending);
-	var bisectRight = ascendingBisect.right;
-	var bisectCenter = d3_bisector(number).center;
+	function circleStream(stream, radius, delta, direction, t0, t1) {
+	  if (!delta) return;
+	  var cosRadius = cos(radius),
+	      sinRadius = sin(radius),
+	      step = direction * delta;
 
-	// `Array.prototype.fill` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.fill
-	_export({ target: 'Array', proto: true }, {
-	  fill: arrayFill
-	});
+	  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;
+	  }
 
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-	addToUnscopables('fill');
+	  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].
 
-	var INCORRECT_ITERATION$1 = !checkCorrectnessOfIteration(function (iterable) {
-	  Array.from(iterable);
-	});
+	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;
+	}
 
-	// `Array.from` method
-	// https://tc39.github.io/ecma262/#sec-array.from
-	_export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION$1 }, {
-	  from: arrayFrom
-	});
+	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;
+	    }
+	  };
+	}
 
-	var $some$1 = arrayIteration.some;
+	function pointEqual (a, b) {
+	  return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;
+	}
 
+	function Intersection(point, points, other, entry) {
+	  this.x = point;
+	  this.z = points;
+	  this.o = other; // another intersection
 
+	  this.e = entry; // is an entry?
 
-	var STRICT_METHOD$4 = arrayMethodIsStrict('some');
-	var USES_TO_LENGTH$7 = arrayMethodUsesToLength('some');
+	  this.v = false; // visited
 
-	// `Array.prototype.some` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.some
-	_export({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 || !USES_TO_LENGTH$7 }, {
-	  some: function some(callbackfn /* , thisArg */) {
-	    return $some$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
+	  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.
 
-	// `Float64Array` constructor
-	// https://tc39.github.io/ecma262/#sec-typedarray-objects
-	typedArrayConstructor('Float64', function (init) {
-	  return function Float64Array(data, byteOffset, length) {
-	    return init(this, data, byteOffset, length);
-	  };
-	});
 
-	var exportTypedArrayStaticMethod$1 = arrayBufferViewCore.exportTypedArrayStaticMethod;
+	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;
 
+	    if (pointEqual(p0, p1)) {
+	      if (!p0[2] && !p1[2]) {
+	        stream.lineStart();
 
-	// `%TypedArray%.from` method
-	// https://tc39.github.io/ecma262/#sec-%typedarray%.from
-	exportTypedArrayStaticMethod$1('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);
+	        for (i = 0; i < n; ++i) {
+	          stream.point((p0 = segment[i])[0], p0[1]);
+	        }
 
-	function d3_descending (a, b) {
-	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-	}
+	        stream.lineEnd();
+	        return;
+	      } // handle degenerate cases by moving the point
 
-	// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
-	var Adder = /*#__PURE__*/function () {
-	  function Adder() {
-	    _classCallCheck(this, Adder);
 
-	    this._partials = new Float64Array(32);
-	    this._n = 0;
+	      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;
 	  }
 
-	  _createClass(Adder, [{
-	    key: "add",
-	    value: function add(x) {
-	      var p = this._partials;
-	      var i = 0;
+	  var start = subject[0],
+	      points,
+	      point;
 
-	      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;
-	      }
+	  while (1) {
+	    // Find first unvisited intersection.
+	    var current = start,
+	        isSubject = true;
 
-	      p[i] = x;
-	      this._n = i + 1;
-	      return this;
+	    while (current.v) {
+	      if ((current = current.n) === start) return;
 	    }
-	  }, {
-	    key: "valueOf",
-	    value: function valueOf() {
-	      var p = this._partials;
-	      var n = this._n,
-	          x,
-	          y,
-	          lo,
-	          hi = 0;
 
-	      if (n > 0) {
-	        hi = p[--n];
+	    points = current.z;
+	    stream.lineStart();
 
-	        while (n > 0) {
-	          x = hi;
-	          y = p[--n];
-	          hi = x + y;
-	          lo = y - (hi - x);
-	          if (lo) break;
-	        }
+	    do {
+	      current.v = current.o.v = true;
 
-	        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;
+	      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);
 	        }
-	      }
 
-	      return hi;
-	    }
-	  }]);
+	        current = current.n;
+	      } else {
+	        if (isSubject) {
+	          points = current.p.z;
 
-	  return Adder;
-	}();
+	          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);
+	        }
 
-	// `Map` constructor
-	// https://tc39.github.io/ecma262/#sec-map-objects
-	var es_map = collection('Map', function (init) {
-	  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
-	}, collectionStrong);
+	        current = current.p;
+	      }
 
-	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 [];
+	      current = current.o;
+	      points = current.z;
+	      isSubject = !isSubject;
+	    } while (!current.v);
 
-	  if (step > 0) {
-	    start = Math.ceil(start / step);
-	    stop = Math.floor(stop / step);
-	    ticks = new Array(n = Math.ceil(stop - start + 1));
+	    stream.lineEnd();
+	  }
+	}
 
-	    while (++i < n) {
-	      ticks[i] = (start + i) * step;
-	    }
-	  } else {
-	    step = -step;
-	    start = Math.ceil(start * step);
-	    stop = Math.floor(stop * step);
-	    ticks = new Array(n = Math.ceil(stop - start + 1));
+	function link(array) {
+	  if (!(n = array.length)) return;
+	  var n,
+	      i = 0,
+	      a = array[0],
+	      b;
 
-	    while (++i < n) {
-	      ticks[i] = (start + i) / step;
-	    }
+	  while (++i < n) {
+	    a.n = b = array[i];
+	    b.p = a;
+	    a = b;
 	  }
 
-	  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);
+	  a.n = b = array[0];
+	  b.p = a;
 	}
-	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 longitude(point) {
+	  if (abs$2(point[0]) <= pi) return point[0];else return sign(point[0]) * ((abs$2(point[0]) + pi) % tau - pi);
 	}
 
-	function max$4(values, valueof) {
-	  var max;
+	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;
 
-	  if (valueof === undefined) {
-	    var _iterator = _createForOfIteratorHelper(values),
-	        _step;
+	  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);
 
-	    try {
-	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
-	        var value = _step.value;
+	    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)?
 
-	        if (value != null && (max < value || max === undefined && value >= value)) {
-	          max = value;
+	      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;
 	        }
 	      }
-	    } catch (err) {
-	      _iterator.e(err);
-	    } finally {
-	      _iterator.f();
 	    }
-	  } else {
-	    var index = -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.
 
-	    var _iterator2 = _createForOfIteratorHelper(values),
-	        _step2;
 
-	    try {
-	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
-	        var _value = _step2.value;
+	  return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;
+	}
 
-	        if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
-	          max = _value;
-	        }
-	      }
-	    } catch (err) {
-	      _iterator2.e(err);
-	    } finally {
-	      _iterator2.f();
-	    }
-	  }
+	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);
 
-	  return max;
-	}
+	        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();
+	        }
 
-	function min$7(values, valueof) {
-	  var min;
+	        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();
+	      }
+	    };
 
-	  if (valueof === undefined) {
-	    var _iterator = _createForOfIteratorHelper(values),
-	        _step;
+	    function point(lambda, phi) {
+	      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
+	    }
 
-	    try {
-	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
-	        var value = _step.value;
+	    function pointLine(lambda, phi) {
+	      line.point(lambda, phi);
+	    }
 
-	        if (value != null && (min > value || min === undefined && value >= value)) {
-	          min = value;
-	        }
-	      }
-	    } catch (err) {
-	      _iterator.e(err);
-	    } finally {
-	      _iterator.f();
+	    function lineStart() {
+	      clip.point = pointLine;
+	      line.lineStart();
 	    }
-	  } else {
-	    var index = -1;
 
-	    var _iterator2 = _createForOfIteratorHelper(values),
-	        _step2;
+	    function lineEnd() {
+	      clip.point = point;
+	      line.lineEnd();
+	    }
 
-	    try {
-	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
-	        var _value = _step2.value;
+	    function pointRing(lambda, phi) {
+	      ring.push([lambda, phi]);
+	      ringSink.point(lambda, phi);
+	    }
 
-	        if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
-	          min = _value;
-	        }
-	      }
-	    } catch (err) {
-	      _iterator2.e(err);
-	    } finally {
-	      _iterator2.f();
+	    function ringStart() {
+	      ringSink.lineStart();
+	      ring = [];
 	    }
-	  }
 
-	  return min;
-	}
+	    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.
 
-	// ISC license, Copyright 2018 Vladimir Agafonkin.
+	      if (clean & 1) {
+	        segment = ringSegments[0];
 
-	function quickselect(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;
+	        if ((m = segment.length - 1) > 0) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
 
-	  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(array, k, newLeft, newRight, compare);
-	    }
+	          for (i = 0; i < m; ++i) {
+	            sink.point((point = segment[i])[0], point[1]);
+	          }
 
-	    var t = array[k];
-	    var i = left;
-	    var j = right;
-	    swap(array, left, k);
-	    if (compare(array[right], t) > 0) swap(array, left, right);
+	          sink.lineEnd();
+	        }
 
-	    while (i < j) {
-	      swap(array, i, j), ++i, --j;
+	        return;
+	      } // Rejoin connected segments.
+	      // TODO reuse ringBuffer.rejoin()?
 
-	      while (compare(array[i], t) < 0) {
-	        ++i;
-	      }
 
-	      while (compare(array[j], t) > 0) {
-	        --j;
-	      }
+	      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+	      segments.push(ringSegments.filter(validSegment));
 	    }
 
-	    if (compare(array[left], t) === 0) swap(array, left, j);else ++j, swap(array, j, right);
-	    if (j <= k) left = j + 1;
-	    if (k <= j) right = j - 1;
-	  }
-
-	  return array;
+	    return clip;
+	  };
 	}
 
-	function swap(array, i, j) {
-	  var t = array[i];
-	  array[i] = array[j];
-	  array[j] = t;
-	}
+	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 quantile(values, p, valueof) {
-	  values = Float64Array.from(numbers(values, valueof));
-	  if (!(n = values.length)) return;
-	  if ((p = +p) <= 0 || n < 2) return min$7(values);
-	  if (p >= 1) return max$4(values);
-	  var n,
-	      i = (n - 1) * p,
-	      i0 = Math.floor(i),
-	      value0 = max$4(quickselect(values, i0).subarray(0, i0 + 1)),
-	      value1 = min$7(values.subarray(i0 + 1));
-	  return value0 + (value1 - value0) * (i - i0);
-	}
 
-	function d3_median (values, valueof) {
-	  return quantile(values, 0.5, valueof);
+	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]);
 	}
 
-	var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
+	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.
 
-	function flatten(arrays) {
-	  var _iterator, _step, array;
+	function clipAntimeridianLine(stream) {
+	  var lambda0 = NaN,
+	      phi0 = NaN,
+	      sign0 = NaN,
+	      _clean; // no intersections
 
-	  return regeneratorRuntime.wrap(function flatten$(_context) {
-	    while (1) {
-	      switch (_context.prev = _context.next) {
-	        case 0:
-	          _iterator = _createForOfIteratorHelper(arrays);
-	          _context.prev = 1;
 
-	          _iterator.s();
+	  return {
+	    lineStart: function lineStart() {
+	      stream.lineStart();
+	      _clean = 1;
+	    },
+	    point: function point(lambda1, phi1) {
+	      var sign1 = lambda1 > 0 ? pi : -pi,
+	          delta = abs$2(lambda1 - lambda0);
 
-	        case 3:
-	          if ((_step = _iterator.n()).done) {
-	            _context.next = 8;
-	            break;
-	          }
+	      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
 
-	          array = _step.value;
-	          return _context.delegateYield(array, "t0", 6);
+	        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;
+	      }
 
-	        case 6:
-	          _context.next = 3;
-	          break;
+	      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
+	    }
+	  };
+	}
 
-	        case 8:
-	          _context.next = 13;
-	          break;
+	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;
+	}
 
-	        case 10:
-	          _context.prev = 10;
-	          _context.t1 = _context["catch"](1);
+	function clipAntimeridianInterpolate(from, to, direction, stream) {
+	  var phi;
 
-	          _iterator.e(_context.t1);
+	  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 {
+	    stream.point(to[0], to[1]);
+	  }
+	}
 
-	        case 13:
-	          _context.prev = 13;
+	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
 
-	          _iterator.f();
+	  function interpolate(from, to, direction, stream) {
+	    circleStream(stream, radius, delta, direction, from, to);
+	  }
 
-	          return _context.finish(13);
+	  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.
 
-	        case 16:
-	        case "end":
-	          return _context.stop();
-	      }
-	    }
-	  }, _marked$1, null, [[1, 10, 13, 16]]);
-	}
 
-	function merge(arrays) {
-	  return Array.from(flatten(arrays));
-	}
+	  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 range (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);
 
-	  while (++i < n) {
-	    range[i] = start + i * step;
-	  }
+	    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();
 
-	  return range;
-	}
+	        if (v !== v0) {
+	          point2 = intersect(point0, point1);
+	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
+	        }
 
-	var test$2 = [];
-	var nativeSort = test$2.sort;
+	        if (v !== v0) {
+	          _clean = 0;
 
-	// IE8-
-	var FAILS_ON_UNDEFINED = fails(function () {
-	  test$2.sort(undefined);
-	});
-	// V8 bug
-	var FAILS_ON_NULL = fails(function () {
-	  test$2.sort(null);
-	});
-	// Old WebKit
-	var STRICT_METHOD$5 = arrayMethodIsStrict('sort');
+	          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();
+	          }
 
-	var FORCED$a = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$5;
+	          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.
 
-	// `Array.prototype.sort` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.sort
-	_export({ target: 'Array', proto: true, forced: FORCED$a }, {
-	  sort: function sort(comparefn) {
-	    return comparefn === undefined
-	      ? nativeSort.call(toObject(this))
-	      : nativeSort.call(toObject(this), aFunction$1(comparefn));
-	  }
-	});
+	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
+	            _clean = 0;
 
-	// `SameValue` abstract operation
-	// https://tc39.github.io/ecma262/#sec-samevalue
-	var sameValue = Object.is || function is(x, y) {
-	  // eslint-disable-next-line no-self-compare
-	  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
-	};
+	            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);
+	            }
+	          }
+	        }
 
-	var $hypot = Math.hypot;
-	var abs$1 = Math.abs;
-	var sqrt = Math.sqrt;
+	        if (v && (!point0 || !pointEqual(point0, point1))) {
+	          stream.point(point1[0], point1[1]);
+	        }
 
-	// Chrome 77 bug
-	// https://bugs.chromium.org/p/v8/issues/detail?id=9546
-	var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
+	        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.
 
-	// `Math.hypot` method
-	// https://tc39.github.io/ecma262/#sec-math.hypot
-	_export({ target: 'Math', stat: true, forced: BUGGY }, {
-	  hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars
-	    var sum = 0;
-	    var i = 0;
-	    var aLen = arguments.length;
-	    var larg = 0;
-	    var arg, div;
-	    while (i < aLen) {
-	      arg = abs$1(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(sum);
-	  }
-	});
 
-	// `Math.sign` method implementation
-	// https://tc39.github.io/ecma262/#sec-math.sign
-	var mathSign = Math.sign || function sign(x) {
-	  // eslint-disable-next-line no-self-compare
-	  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
-	};
+	  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).
 
-	// `Math.sign` method
-	// https://tc39.github.io/ecma262/#sec-math.sign
-	_export({ target: 'Math', stat: true }, {
-	  sign: mathSign
-	});
+	    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.
 
-	var epsilon = 1e-6;
-	var epsilon2 = 1e-12;
-	var pi = Math.PI;
-	var halfPi = pi / 2;
-	var quarterPi = pi / 4;
-	var tau = pi * 2;
-	var degrees = 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 = Math.exp;
-	var hypot = Math.hypot;
-	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$1 = Math.sqrt;
-	var tan = Math.tan;
-	function acos(x) {
-	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
-	}
-	function asin(x) {
-	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
-	}
+	    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.
 
-	function noop() {}
+	    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.
 
-	function streamGeometry(geometry, stream) {
-	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
-	    streamGeometryType[geometry.type](geometry, stream);
+	    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]);
 	}
 
-	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;
+	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;
 
-	    while (++i < n) {
-	      streamGeometry(features[i].geometry, stream);
-	    }
+	  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;
 	  }
-	};
-	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;
 
-	    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;
+	  r = x1 - ax;
+	  if (!dx && r < 0) return;
+	  r /= dx;
 
-	    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;
+	  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;
+	  }
 
-	    while (++i < n) {
-	      streamPolygon(coordinates[i], stream);
-	    }
-	  },
-	  GeometryCollection: function GeometryCollection(object, stream) {
-	    var geometries = object.geometries,
-	        i = -1,
-	        n = geometries.length;
+	  r = y0 - ay;
+	  if (!dy && r > 0) return;
+	  r /= dy;
 
-	    while (++i < n) {
-	      streamGeometry(geometries[i], stream);
-	    }
+	  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 streamLine(coordinates, stream, closed) {
-	  var i = -1,
-	      n = coordinates.length - closed,
-	      coordinate;
-	  stream.lineStart();
+	  r = y1 - ay;
+	  if (!dy && r < 0) return;
+	  r /= dy;
 
-	  while (++i < n) {
-	    coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+	  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;
 	  }
 
-	  stream.lineEnd();
+	  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;
 	}
 
-	function streamPolygon(coordinates, stream) {
-	  var i = -1,
-	      n = coordinates.length;
-	  stream.polygonStart();
+	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?
 
-	  while (++i < n) {
-	    streamLine(coordinates[i], stream, 1);
+	function clipRectangle(x0, y0, x1, y1) {
+	  function visible(x, y) {
+	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
 	  }
 
-	  stream.polygonEnd();
-	}
+	  function interpolate(from, to, direction, stream) {
+	    var a = 0,
+	        a1 = 0;
 
-	function d3_geoStream (object, stream) {
-	  if (object && streamObjectType.hasOwnProperty(object.type)) {
-	    streamObjectType[object.type](object, stream);
-	  } else {
-	    streamGeometry(object, stream);
+	    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]);
+	    }
 	  }
-	}
 
-	var areaRingSum = new Adder(); // hello?
+	  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
+	  }
 
-	var areaSum = new Adder(),
-	    lambda00,
-	    phi00,
-	    lambda0,
-	    cosPhi0,
-	    sinPhi0;
-	var areaStream = {
-	  point: noop,
-	  lineStart: noop,
-	  lineEnd: noop,
-	  polygonStart: function polygonStart() {
-	    areaRingSum = new Adder();
-	    areaStream.lineStart = areaRingStart;
-	    areaStream.lineEnd = areaRingEnd;
-	  },
-	  polygonEnd: function polygonEnd() {
-	    var areaRing = +areaRingSum;
-	    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-	    this.lineStart = this.lineEnd = this.point = noop;
-	  },
-	  sphere: function sphere() {
-	    areaSum.add(tau);
+	  function compareIntersection(a, b) {
+	    return comparePoint(a.x, b.x);
 	  }
-	};
 
-	function areaRingStart() {
-	  areaStream.point = areaPointFirst;
-	}
+	  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];
+	  }
 
-	function areaRingEnd() {
-	  areaPoint(lambda00, phi00);
-	}
+	  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
+	    };
 
-	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);
-	}
+	    function point(x, y) {
+	      if (visible(x, y)) activeStream.point(x, y);
+	    }
 
-	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).
+	    function polygonInside() {
+	      var winding = 0;
 
-	  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)); // Advance the previous points.
+	      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];
 
-	  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
-	}
+	          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;
+	          }
+	        }
+	      }
 
-	function d3_geoArea (object) {
-	  areaSum = new Adder();
-	  d3_geoStream(object, areaStream);
-	  return areaSum * 2;
-	}
+	      return winding;
+	    } // Buffer geometry within a polygon and then clip it en masse.
 
-	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
 
-	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
+	    function polygonStart() {
+	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
+	    }
 
-	function cartesianNormalizeInPlace(d) {
-	  var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
-	  d[0] /= l, d[1] /= l, d[2] /= l;
-	}
+	    function polygonEnd() {
+	      var startInside = polygonInside(),
+	          cleanInside = clean && startInside,
+	          visible = (segments = merge$4(segments)).length;
 
-	var lambda0$1, phi0, lambda1, phi1, // bounds
-	lambda2, // previous lambda-coordinate
-	lambda00$1, phi00$1, // first point
-	p0, // previous 3D point
-	deltaSum, ranges, range$1;
-	var boundsStream = {
-	  point: boundsPoint,
-	  lineStart: boundsLineStart,
-	  lineEnd: boundsLineEnd,
-	  polygonStart: function polygonStart() {
-	    boundsStream.point = boundsRingPoint;
-	    boundsStream.lineStart = boundsRingStart;
-	    boundsStream.lineEnd = boundsRingEnd;
-	    deltaSum = new Adder();
-	    areaStream.polygonStart();
-	  },
-	  polygonEnd: function polygonEnd() {
-	    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$1[0] = lambda0$1, range$1[1] = lambda1;
-	  },
-	  sphere: function sphere() {
-	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
-	  }
-	};
+	      if (cleanInside || visible) {
+	        stream.polygonStart();
 
-	function boundsPoint(lambda, phi) {
-	  ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
-	  if (phi < phi0) phi0 = phi;
-	  if (phi > phi1) phi1 = phi;
-	}
+	        if (cleanInside) {
+	          stream.lineStart();
+	          interpolate(null, null, 1, stream);
+	          stream.lineEnd();
+	        }
 
-	function linePoint(lambda, phi) {
-	  var p = cartesian([lambda * radians, phi * radians]);
+	        if (visible) {
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+	        }
 
-	  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;
+	        stream.polygonEnd();
+	      }
 
-	    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;
-	    } else {
-	      if (phi < phi0) phi0 = phi;
-	      if (phi > phi1) phi1 = phi;
+	      activeStream = stream, segments = polygon = ring = 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;
+	    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.
+
+
+	    function lineEnd() {
+	      if (segments) {
+	        linePoint(x__, y__);
+	        if (v__ && v_) bufferStream.rejoin();
+	        segments.push(bufferStream.result());
 	      }
-	    } else {
-	      if (lambda1 >= lambda0$1) {
-	        if (lambda < lambda0$1) lambda0$1 = lambda;
-	        if (lambda > lambda1) lambda1 = lambda;
+
+	      clipStream.point = point;
+	      if (v_) activeStream.lineEnd();
+	    }
+
+	    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 (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;
+	        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;
 	    }
-	  } else {
-	    ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
-	  }
 
-	  if (phi < phi0) phi0 = phi;
-	  if (phi > phi1) phi1 = phi;
-	  p0 = p, lambda2 = lambda;
+	    return clipStream;
+	  };
 	}
 
-	function boundsLineStart() {
-	  boundsStream.point = linePoint;
+	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 boundsLineEnd() {
-	  range$1[0] = lambda0$1, range$1[1] = lambda1;
-	  boundsStream.point = boundsPoint;
-	  p0 = null;
+	function lengthLineEnd() {
+	  lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
 	}
 
-	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;
-	  }
+	function lengthPointFirst$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
+	  lengthStream$1.point = lengthPoint$1;
+	}
 
-	  areaStream.point(lambda, phi);
-	  linePoint(lambda, phi);
+	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 boundsRingStart() {
-	  areaStream.lineStart();
+	function d3_geoLength (object) {
+	  lengthSum$1 = new Adder();
+	  d3_geoStream(object, lengthStream$1);
+	  return +lengthSum$1;
 	}
 
-	function boundsRingEnd() {
-	  boundsRingPoint(lambda00$1, phi00$1);
-	  areaStream.lineEnd();
-	  if (abs$2(deltaSum) > epsilon) lambda0$1 = -(lambda1 = 180);
-	  range$1[0] = lambda0$1, range$1[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°.
+	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;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+	    areaSum.add(abs$2(areaRingSum));
+	    areaRingSum = new Adder();
+	  },
+	  result: function result() {
+	    var area = areaSum / 2;
+	    areaSum = new Adder();
+	    return area;
+	  }
+	};
 
-	function angle(lambda0, lambda1) {
-	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
+	function areaRingStart() {
+	  areaStream.point = areaPointFirst;
 	}
 
-	function rangeCompare(a, b) {
-	  return a[0] - b[0];
+	function areaPointFirst(x, y) {
+	  areaStream.point = areaPoint;
+	  x00$2 = x0$3 = x, y00$2 = y0$3 = y;
 	}
 
-	function rangeContains(range, x) {
-	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
+	function areaPoint(x, y) {
+	  areaRingSum.add(y0$3 * x - x0$3 * y);
+	  x0$3 = x, y0$3 = y;
 	}
 
-	function d3_geoBounds (feature) {
-	  var i, n, a, b, merged, deltaMax, delta;
-	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
-	  ranges = [];
-	  d3_geoStream(feature, boundsStream); // First, sort ranges by their minimum longitudes.
-
-	  if (n = ranges.length) {
-	    ranges.sort(rangeCompare); // 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);
-	      }
-	    } // Finally, find the largest gap between the merged ranges.
-	    // The final bounding box will be the inverse of this gap.
-
+	function areaRingEnd() {
+	  areaPoint(x00$2, y00$2);
+	}
 
-	    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];
-	    }
+	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;
 	  }
+	};
 
-	  ranges = range$1 = null;
-	  return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
+	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;
 	}
 
-	var W0, W1, X0, Y0, Z0, X1, Y1, Z1, X2, Y2, Z2, lambda00$2, phi00$2, // first point
-	x0, y0, z0; // previous point
-
+	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 = {
-	  sphere: noop,
 	  point: centroidPoint,
 	  lineStart: centroidLineStart,
 	  lineEnd: centroidLineEnd,
@@ -10226,2772 +12087,2439 @@
 	    centroidStream.lineEnd = centroidRingEnd;
 	  },
 	  polygonEnd: function polygonEnd() {
+	    centroidStream.point = centroidPoint;
 	    centroidStream.lineStart = centroidLineStart;
 	    centroidStream.lineEnd = centroidLineEnd;
+	  },
+	  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;
 	  }
-	}; // 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 centroidPointCartesian(x, y, z) {
-	  ++W0;
-	  X0 += (x - X0) / W0;
-	  Y0 += (y - Y0) / W0;
-	  Z0 += (z - Z0) / W0;
+	function centroidPoint(x, y) {
+	  X0 += x;
+	  Y0 += y;
+	  ++Z0;
 	}
 
 	function centroidLineStart() {
-	  centroidStream.point = centroidLinePointFirst;
+	  centroidStream.point = centroidPointFirstLine;
 	}
 
-	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);
+	function centroidPointFirstLine(x, y) {
+	  centroidStream.point = centroidPointLine;
+	  centroidPoint(x0$1 = x, y0$1 = y);
 	}
 
-	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$1((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 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 centroidLineEnd() {
 	  centroidStream.point = centroidPoint;
-	} // See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-	// J. Applied Mechanics 42, 239 (1975).
-
+	}
 
 	function centroidRingStart() {
-	  centroidStream.point = centroidRingPointFirst;
+	  centroidStream.point = centroidPointFirstRing;
 	}
 
 	function centroidRingEnd() {
-	  centroidRingPoint(lambda00$2, phi00$2);
-	  centroidStream.point = centroidPoint;
+	  centroidPointRing(x00$1, y00$1);
 	}
 
-	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);
+	function centroidPointFirstRing(x, y) {
+	  centroidStream.point = centroidPointRing;
+	  centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
 	}
 
-	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 = hypot(cx, cy, cz),
-	      w = asin(m),
-	      // line weight = angle
-	  v = m && -w / m; // area weight multiplier
-
-	  X2.add(v * cx);
-	  Y2.add(v * cy);
-	  Z2.add(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 = 0;
-	  X2 = new Adder();
-	  Y2 = new Adder();
-	  Z2 = new Adder();
-	  d3_geoStream(object, centroidStream);
-	  var x = +X2,
-	      y = +Y2,
-	      z = +Z2,
-	      m = hypot(x, y, 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 = hypot(x, y, z); // If the feature still has an undefined ccentroid, then return.
-
-	    if (m < epsilon2) return [NaN, NaN];
-	  }
-
-	  return [atan2(y, x) * degrees, asin(z / m) * degrees];
+	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 compose (a, b) {
-	  function compose(x, y) {
-	    return x = a(x, y), b(x[0], x[1]);
-	  }
-
-	  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 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 rotationIdentity(lambda, phi) {
-	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
-	}
+	          this._point = 1;
+	          break;
+	        }
 
-	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;
+	      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;
+	        }
+	    }
+	  },
+	  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 forwardRotationLambda(deltaLambda) {
-	  return function (lambda, phi) {
-	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
-	  };
+	function lengthPoint(x, y) {
+	  x0 -= x, y0 -= y;
+	  lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+	  x0 = x, y0 = y;
 	}
 
-	function rotationLambda(deltaLambda) {
-	  var rotation = forwardRotationLambda(deltaLambda);
-	  rotation.invert = forwardRotationLambda(-deltaLambda);
-	  return rotation;
+	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 rotationPhiGamma(deltaPhi, deltaGamma) {
-	  var cosDeltaPhi = cos(deltaPhi),
-	      sinDeltaPhi = sin(deltaPhi),
-	      cosDeltaGamma = cos(deltaGamma),
-	      sinDeltaGamma = sin(deltaGamma);
+	          this._point = 1;
+	          break;
+	        }
 
-	  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)];
-	  }
+	      case 1:
+	        {
+	          this._string.push("L", x, ",", y);
 
-	  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)];
-	  };
+	          break;
+	        }
 
-	  return rotation;
+	      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 {
+	      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";
 	}
 
-	function rotation (rotate) {
-	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
+	function d3_geoPath (projection, context) {
+	  var pointRadius = 4.5,
+	      projectionStream,
+	      contextStream;
 
-	  function forward(coordinates) {
-	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+	  function path(object) {
+	    if (object) {
+	      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+	      d3_geoStream(object, projectionStream(contextStream));
+	    }
+
+	    return contextStream.result();
 	  }
 
-	  forward.invert = function (coordinates) {
-	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+	  path.area = function (object) {
+	    d3_geoStream(object, projectionStream(areaStream));
+	    return areaStream.result();
 	  };
 
-	  return forward;
-	}
+	  path.measure = function (object) {
+	    d3_geoStream(object, projectionStream(lengthStream));
+	    return lengthStream.result();
+	  };
 
-	function circleStream(stream, radius, delta, direction, t0, t1) {
-	  if (!delta) return;
-	  var cosRadius = cos(radius),
-	      sinRadius = sin(radius),
-	      step = direction * delta;
+	  path.bounds = function (object) {
+	    d3_geoStream(object, projectionStream(boundsStream));
+	    return boundsStream.result();
+	  };
 
-	  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;
-	  }
+	  path.centroid = function (object) {
+	    d3_geoStream(object, projectionStream(centroidStream));
+	    return centroidStream.result();
+	  };
 
-	  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].
+	  path.projection = function (_) {
+	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
+	  };
 
-	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;
+	  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;
+	  };
+
+	  path.pointRadius = function (_) {
+	    if (!arguments.length) return pointRadius;
+	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+	    return path;
+	  };
+
+	  return path.projection(projection).context(context);
 	}
 
-	function clipBuffer () {
-	  var lines = [],
-	      line;
+	function d3_geoTransform (methods) {
 	  return {
-	    point: function point(x, y, m) {
-	      line.push([x, y, m]);
-	    },
-	    lineStart: function lineStart() {
-	      lines.push(line = []);
-	    },
-	    lineEnd: noop,
-	    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;
-	    }
+	    stream: transformer$1(methods)
 	  };
 	}
+	function transformer$1(methods) {
+	  return function (stream) {
+	    var s = new TransformStream();
 
-	function pointEqual (a, b) {
-	  return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
-	}
+	    for (var key in methods) {
+	      s[key] = methods[key];
+	    }
 
-	function Intersection(point, points, other, entry) {
-	  this.x = point;
-	  this.z = points;
-	  this.o = other; // another intersection
+	    s.stream = stream;
+	    return s;
+	  };
+	}
 
-	  this.e = entry; // is an entry?
+	function TransformStream() {}
 
-	  this.v = false; // visited
+	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();
+	  }
+	};
 
-	  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 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);
+	}
 
-	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;
+	var maxDepth = 16,
+	    // maximum depth of subdivision
+	cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
 
-	    if (pointEqual(p0, p1)) {
-	      if (!p0[2] && !p1[2]) {
-	        stream.lineStart();
+	function resample (project, delta2) {
+	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
+	}
 
-	        for (i = 0; i < n; ++i) {
-	          stream.point((p0 = segment[i])[0], p0[1]);
-	        }
+	function resampleNone(project) {
+	  return transformer$1({
+	    point: function point(x, y) {
+	      x = project(x, y);
+	      this.stream.point(x[0], x[1]);
+	    }
+	  });
+	}
 
-	        stream.lineEnd();
-	        return;
-	      } // handle degenerate cases by moving the point
+	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$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;
 
-	      p1[0] += 2 * epsilon;
+	      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);
+	      }
 	    }
-
-	    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;
 	  }
 
-	  var start = subject[0],
-	      points,
-	      point;
+	  return function (stream) {
+	    var lambda00, x00, y00, a00, b00, c00, // first point
+	    lambda0, x0, y0, a0, b0, c0; // previous point
 
-	  while (1) {
-	    // Find first unvisited intersection.
-	    var current = start,
-	        isSubject = true;
+	    var resampleStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        stream.polygonStart();
+	        resampleStream.lineStart = ringStart;
+	      },
+	      polygonEnd: function polygonEnd() {
+	        stream.polygonEnd();
+	        resampleStream.lineStart = lineStart;
+	      }
+	    };
 
-	    while (current.v) {
-	      if ((current = current.n) === start) return;
+	    function point(x, y) {
+	      x = project(x, y);
+	      stream.point(x[0], x[1]);
 	    }
 
-	    points = current.z;
-	    stream.lineStart();
-
-	    do {
-	      current.v = current.o.v = true;
+	    function lineStart() {
+	      x0 = NaN;
+	      resampleStream.point = linePoint;
+	      stream.lineStart();
+	    }
 
-	      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 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);
+	    }
 
-	        current = current.n;
-	      } else {
-	        if (isSubject) {
-	          points = current.p.z;
+	    function lineEnd() {
+	      resampleStream.point = point;
+	      stream.lineEnd();
+	    }
 
-	          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 ringStart() {
+	      lineStart();
+	      resampleStream.point = ringPoint;
+	      resampleStream.lineEnd = ringEnd;
+	    }
 
-	        current = current.p;
-	      }
+	    function ringPoint(lambda, phi) {
+	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+	      resampleStream.point = linePoint;
+	    }
 
-	      current = current.o;
-	      points = current.z;
-	      isSubject = !isSubject;
-	    } while (!current.v);
+	    function ringEnd() {
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+	      resampleStream.lineEnd = lineEnd;
+	      lineEnd();
+	    }
 
-	    stream.lineEnd();
-	  }
+	    return resampleStream;
+	  };
 	}
 
-	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;
+	var transformRadians = transformer$1({
+	  point: function point(x, y) {
+	    this.stream.point(x * radians, y * radians);
 	  }
+	});
 
-	  a.n = b = array[0];
-	  b.p = a;
-	}
-
-	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 transformRotate(rotate) {
+	  return transformer$1({
+	    point: function point(x, y) {
+	      var r = rotate(x, y);
+	      return this.stream.point(r[0], r[1]);
+	    }
+	  });
 	}
 
-	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;else if (sinPhi === -1) phi = -halfPi - epsilon;
+	function scaleTranslate(k, dx, dy, sx, sy) {
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [dx + k * x, dy - k * y];
+	  }
 
-	  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);
+	  transform.invert = function (x, y) {
+	    return [(x - dx) / k * sx, (dy - y) / k * sy];
+	  };
 
-	    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)?
+	  return transform;
+	}
 
-	      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 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;
 
-	        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 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 (angle < -epsilon || angle < epsilon && sum < -epsilon2) ^ winding & 1;
+	  return transform;
 	}
 
-	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(segments);
-	        var startInside = polygonContains(polygon, start);
+	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;
 
-	        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();
-	        }
+	  function projection(point) {
+	    return projectRotateTransform(point[0] * radians, point[1] * radians);
+	  }
 
-	        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 invert(point) {
+	    point = projectRotateTransform.invert(point[0], point[1]);
+	    return point && [point[0] * degrees$1, point[1] * degrees$1];
+	  }
 
-	    function point(lambda, phi) {
-	      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
-	    }
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+	  };
 
-	    function pointLine(lambda, phi) {
-	      line.point(lambda, phi);
-	    }
+	  projection.preclip = function (_) {
+	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+	  };
 
-	    function lineStart() {
-	      clip.point = pointLine;
-	      line.lineStart();
-	    }
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	  };
 
-	    function lineEnd() {
-	      clip.point = point;
-	      line.lineEnd();
-	    }
+	  projection.clipAngle = function (_) {
+	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
+	  };
 
-	    function pointRing(lambda, phi) {
-	      ring.push([lambda, phi]);
-	      ringSink.point(lambda, phi);
-	    }
+	  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 ringStart() {
-	      ringSink.lineStart();
-	      ring = [];
-	    }
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, recenter()) : k;
+	  };
 
-	    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.
+	  projection.translate = function (_) {
+	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
+	  };
 
-	      if (clean & 1) {
-	        segment = ringSegments[0];
+	  projection.center = function (_) {
+	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
+	  };
 
-	        if ((m = segment.length - 1) > 0) {
-	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
-	          sink.lineStart();
+	  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];
+	  };
 
-	          for (i = 0; i < m; ++i) {
-	            sink.point((point = segment[i])[0], point[1]);
-	          }
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
+	  };
 
-	          sink.lineEnd();
-	        }
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+	  };
 
-	        return;
-	      } // Rejoin connected segments.
-	      // TODO reuse ringBuffer.rejoin()?
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+	  };
 
+	  projection.precision = function (_) {
+	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
+	  };
 
-	      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
-	      segments.push(ringSegments.filter(validSegment));
-	    }
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
+	  };
 
-	    return clip;
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
 	  };
-	}
 
-	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.
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
+	  };
 
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
 
-	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]);
-	}
+	  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();
+	  }
 
-	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.
+	  function reset() {
+	    cache = cacheStream = null;
+	    return projection;
+	  }
 
-	function clipAntimeridianLine(stream) {
-	  var lambda0 = NaN,
-	      phi0 = NaN,
-	      sign0 = NaN,
-	      _clean; // no intersections
+	  return function () {
+	    project = projectAt.apply(this, arguments);
+	    projection.invert = project.invert && invert;
+	    return recenter();
+	  };
+	}
 
+	function mercatorRaw(lambda, phi) {
+	  return [lambda, log$1(tan((halfPi + phi) / 2))];
+	}
 
-	  return {
-	    lineStart: function lineStart() {
-	      stream.lineStart();
-	      _clean = 1;
-	    },
-	    point: function point(lambda1, phi1) {
-	      var sign1 = lambda1 > 0 ? pi : -pi,
-	          delta = abs$2(lambda1 - lambda0);
+	mercatorRaw.invert = function (x, y) {
+	  return [x, 2 * atan(exp$2(y)) - halfPi];
+	};
 
-	      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
+	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
 
-	        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;
-	      }
+	  m.scale = function (_) {
+	    return arguments.length ? (scale(_), reclip()) : scale();
+	  };
 
-	      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
-	    }
+	  m.translate = function (_) {
+	    return arguments.length ? (translate(_), reclip()) : translate();
 	  };
-	}
 
-	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;
-	}
+	  m.center = function (_) {
+	    return arguments.length ? (center(_), reclip()) : center();
+	  };
 
-	function clipAntimeridianInterpolate(from, to, direction, stream) {
-	  var phi;
+	  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 (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]);
+	  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)]]);
 	  }
+
+	  return reclip();
 	}
 
-	function clipCircle (radius) {
-	  var cr = cos(radius),
-	      delta = 6 * radians,
-	      smallRadius = cr > 0,
-	      notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
+	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;
 
-	  function interpolate(from, to, direction, stream) {
-	    circleStream(stream, radius, delta, direction, from, to);
+	  function reset() {
+	    kx = k * sx;
+	    ky = k * sy;
+	    cache = cacheStream = null;
+	    return projection;
 	  }
 
-	  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.
+	  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;
+	    }
 
-	  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 [x + tx, y + ty];
+	  }
 
+	  projection.invert = function (p) {
+	    var x = p[0] - tx,
+	        y = p[1] - ty;
 
-	    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 (alpha) {
+	      var t = y * ca + x * sa;
+	      x = x * ca - y * sa;
+	      y = t;
+	    }
 
-	        if (v !== v0) {
-	          point2 = intersect(point0, point1);
-	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
-	        }
+	    return [x / kx, y / ky];
+	  };
 
-	        if (v !== v0) {
-	          _clean = 0;
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+	  };
 
-	          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();
-	          }
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	  };
 
-	          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.
+	  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]];
+	  };
 
-	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
-	            _clean = 0;
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, reset()) : k;
+	  };
 
-	            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);
-	            }
-	          }
-	        }
+	  projection.translate = function (_) {
+	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
+	  };
 
-	        if (v && (!point0 || !pointEqual(point0, point1))) {
-	          stream.point(point1[0], point1[1]);
-	        }
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$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.
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
+	  };
 
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+	  };
 
-	  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).
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
+	  };
 
-	    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.
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
+	  };
 
-	    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.
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
+	  };
 
-	    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$1(t2),
-	        q = cartesianScale(u, (-w - t) / uu);
-	    cartesianAddInPlace(q, A);
-	    q = spherical(q);
-	    if (!two) return q; // Two intersection points.
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
 
-	    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,
-	        meridian = polar || delta < epsilon;
-	    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.
+	  return projection;
+	}
 
-	    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)];
-	    }
-	  } // Generates a 4-bit vector representing the location of a point relative to
-	  // the small circle's bounding box.
+	// 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 geoLonToMeters(dLon, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
+	}
+	function geoMetersToLat(m) {
+	  return m / (TAU * POLAR_RADIUS / 360);
+	}
+	function geoMetersToLon(m, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
+	}
+	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 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 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 code(lambda, phi) {
-	    var r = smallRadius ? radius : pi - radius,
-	        code = 0;
-	    if (lambda < -r) code |= 1; // left
-	    else if (lambda > r) code |= 2; // right
+	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`
 
-	    if (phi < -r) code |= 4; // below
-	    else if (phi > r) code |= 8; // above
+	function geoSphericalClosestNode(nodes, point) {
+	  var minDistance = Infinity,
+	      distance;
+	  var indexOfMin;
 
-	    return code;
+	  for (var i in nodes) {
+	    distance = geoSphericalDistance(nodes[i].loc, point);
+
+	    if (distance < minDistance) {
+	      minDistance = distance;
+	      indexOfMin = i;
+	    }
 	  }
 
-	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
+	  if (indexOfMin !== undefined) {
+	    return {
+	      index: indexOfMin,
+	      distance: minDistance,
+	      node: nodes[indexOfMin]
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	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 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 (dx < 0) {
-	    if (r < t0) return;
-	    if (r < t1) t1 = r;
-	  } else if (dx > 0) {
-	    if (r > t1) return;
-	    if (r > t0) t0 = r;
+	    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;
+	    }
+	  },
+	  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(',');
 	  }
+	});
 
-	  r = x1 - ax;
-	  if (!dx && r < 0) return;
-	  r /= dx;
+	var $$w = _export;
+	var $every = arrayIteration.every;
+	var arrayMethodIsStrict$2 = arrayMethodIsStrict$9;
 
-	  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 STRICT_METHOD$2 = arrayMethodIsStrict$2('every');
+
+	// `Array.prototype.every` method
+	// https://tc39.es/ecma262/#sec-array.prototype.every
+	$$w({ target: 'Array', proto: true, forced: !STRICT_METHOD$2 }, {
+	  every: function every(callbackfn /* , thisArg */) {
+	    return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
 	  }
+	});
 
-	  r = y0 - ay;
-	  if (!dy && r > 0) return;
-	  r /= dy;
+	var $$v = _export;
+	var $reduce = arrayReduce.left;
+	var arrayMethodIsStrict$1 = arrayMethodIsStrict$9;
+	var CHROME_VERSION$1 = engineV8Version;
+	var IS_NODE$1 = engineIsNode;
 
-	  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;
+	var STRICT_METHOD$1 = arrayMethodIsStrict$1('reduce');
+	// Chrome 80-82 has a critical bug
+	// https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+	var CHROME_BUG$1 = !IS_NODE$1 && CHROME_VERSION$1 > 79 && CHROME_VERSION$1 < 83;
+
+	// `Array.prototype.reduce` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reduce
+	$$v({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 || CHROME_BUG$1 }, {
+	  reduce: function reduce(callbackfn /* , initialValue */) {
+	    var length = arguments.length;
+	    return $reduce(this, callbackfn, length, length > 1 ? arguments[1] : undefined);
 	  }
+	});
 
-	  r = y1 - ay;
-	  if (!dy && r < 0) return;
-	  r /= dy;
+	function d3_polygonArea (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      a,
+	      b = polygon[n - 1],
+	      area = 0;
 
-	  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;
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    area += a[1] * b[0] - a[0] * b[1];
 	  }
 
-	  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 area / 2;
 	}
 
-	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 d3_polygonCentroid (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      x = 0,
+	      y = 0,
+	      a,
+	      b = polygon[n - 1],
+	      c,
+	      k = 0;
 
-	function clipRectangle(x0, y0, x1, y1) {
-	  function visible(x, y) {
-	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+	  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;
 	  }
 
-	  function interpolate(from, to, direction, stream) {
-	    var a = 0,
-	        a1 = 0;
+	  return k *= 3, [x / k, y / k];
+	}
 
-	    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]);
+	// 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]);
+	}
+
+	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.
+
+
+	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;
 	    }
-	  }
 
-	  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
+	    indexes[size++] = i;
 	  }
 
-	  function compareIntersection(a, b) {
-	    return comparePoint(a.x, b.x);
+	  return indexes.slice(0, size); // remove popped points
+	}
+
+	function d3_polygonHull (points) {
+	  if ((n = points.length) < 3) return null;
+	  var i,
+	      n,
+	      sortedPoints = new Array(n),
+	      flippedPoints = new Array(n);
+
+	  for (i = 0; i < n; ++i) {
+	    sortedPoints[i] = [+points[i][0], +points[i][1], i];
 	  }
 
-	  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];
+	  sortedPoints.sort(lexicographicOrder);
+
+	  for (i = 0; i < n; ++i) {
+	    flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
 	  }
 
-	  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
-	    };
+	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
+	      lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.
 
-	    function point(x, y) {
-	      if (visible(x, y)) activeStream.point(x, y);
-	    }
+	  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 polygonInside() {
-	      var winding = 0;
+	  for (i = upperIndexes.length - 1; i >= 0; --i) {
+	    hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+	  }
 
-	      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];
+	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
+	    hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+	  }
 
-	          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;
-	          }
-	        }
-	      }
+	  return hull;
+	}
 
-	      return winding;
-	    } // Buffer geometry within a polygon and then clip it en masse.
+	// 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 geoVecAdd(a, b) {
+	  return [a[0] + b[0], a[1] + b[1]];
+	} // vector subtraction
 
-	    function polygonStart() {
-	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
-	    }
+	function geoVecSubtract(a, b) {
+	  return [a[0] - b[0], a[1] - b[1]];
+	} // vector scaling
 
-	    function polygonEnd() {
-	      var startInside = polygonInside(),
-	          cleanInside = clean && startInside,
-	          visible = (segments = merge(segments)).length;
+	function geoVecScale(a, mag) {
+	  return [a[0] * mag, a[1] * mag];
+	} // vector rounding (was: geoRoundCoordinates)
 
-	      if (cleanInside || visible) {
-	        stream.polygonStart();
+	function geoVecFloor(a) {
+	  return [Math.floor(a[0]), Math.floor(a[1])];
+	} // linear interpolation
 
-	        if (cleanInside) {
-	          stream.lineStart();
-	          interpolate(null, null, 1, stream);
-	          stream.lineEnd();
-	        }
+	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
 
-	        if (visible) {
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
-	        }
+	function geoVecLength(a, b) {
+	  return Math.sqrt(geoVecLengthSquare(a, b));
+	} // length of vector raised to the power two
 
-	        stream.polygonEnd();
-	      }
+	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
 
-	      activeStream = stream, segments = polygon = ring = null;
-	    }
-
-	    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.
+	function geoVecNormalize(a) {
+	  var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
 
+	  if (length !== 0) {
+	    return geoVecScale(a, 1 / length);
+	  }
 
-	    function lineEnd() {
-	      if (segments) {
-	        linePoint(x__, y__);
-	        if (v__ && v_) bufferStream.rejoin();
-	        segments.push(bufferStream.result());
-	      }
+	  return [0, 0];
+	} // Return the counterclockwise angle in the range (-pi, pi)
+	// between the positive X axis and the line intersecting a and b.
 
-	      clipStream.point = point;
-	      if (v_) activeStream.lineEnd();
-	    }
+	function geoVecAngle(a, b) {
+	  return Math.atan2(b[1] - a[1], b[0] - a[0]);
+	} // dot product
 
-	    function linePoint(x, y) {
-	      var v = visible(x, y);
-	      if (polygon) ring.push([x, y]);
+	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
 
-	      if (first) {
-	        x__ = x, y__ = y, v__ = v;
-	        first = false;
+	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.
 
-	        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 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
 
-	          if (clipLine(a, b, x0, y0, x1, y1)) {
-	            if (!v_) {
-	              activeStream.lineStart();
-	              activeStream.point(a[0], a[1]);
-	            }
+	function geoVecProject(a, points) {
+	  var min = Infinity;
+	  var idx;
+	  var target;
 
-	            activeStream.point(b[0], b[1]);
-	            if (!v) activeStream.lineEnd();
-	            clean = false;
-	          } else if (v) {
-	            activeStream.lineStart();
-	            activeStream.point(x, y);
-	            clean = false;
-	          }
-	        }
-	      }
+	  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;
 
-	      x_ = x, y_ = y, v_ = v;
+	    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]];
 	    }
 
-	    return clipStream;
-	  };
-	}
-
-	var lengthSum, lambda0$2, sinPhi0$1, cosPhi0$1;
-	var lengthStream = {
-	  sphere: noop,
-	  point: noop,
-	  lineStart: lengthLineStart,
-	  lineEnd: noop,
-	  polygonStart: noop,
-	  polygonEnd: noop
-	};
-
-	function lengthLineStart() {
-	  lengthStream.point = lengthPointFirst;
-	  lengthStream.lineEnd = lengthLineEnd;
-	}
+	    var dist = geoVecLength(p, a);
 
-	function lengthLineEnd() {
-	  lengthStream.point = lengthStream.lineEnd = noop;
-	}
+	    if (dist < min) {
+	      min = dist;
+	      idx = i + 1;
+	      target = p;
+	    }
+	  }
 
-	function lengthPointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-	  lengthStream.point = lengthPoint;
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      target: target
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	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$1(x * x + y * y), z));
-	  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
-	}
+	// between the positive X axis and the line intersecting a and b.
 
-	function d3_geoLength (object) {
-	  lengthSum = new Adder();
-	  d3_geoStream(object, lengthStream);
-	  return +lengthSum;
+	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
 
-	var identity = (function (x) {
-	  return x;
-	});
+	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.
 
-	var areaSum$1 = new Adder(),
-	    areaRingSum$1 = new Adder(),
-	    x00,
-	    y00,
-	    x0$1,
-	    y0$1;
-	var areaStream$1 = {
-	  point: noop,
-	  lineStart: noop,
-	  lineEnd: noop,
-	  polygonStart: function polygonStart() {
-	    areaStream$1.lineStart = areaRingStart$1;
-	    areaStream$1.lineEnd = areaRingEnd$1;
-	  },
-	  polygonEnd: function polygonEnd() {
-	    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop;
-	    areaSum$1.add(abs$2(areaRingSum$1));
-	    areaRingSum$1 = new Adder();
-	  },
-	  result: function result() {
-	    var area = areaSum$1 / 2;
-	    areaSum$1 = new Adder();
-	    return area;
-	  }
-	};
+	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;
 
-	function areaRingStart$1() {
-	  areaStream$1.point = areaPointFirst$1;
-	}
+	  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;
 
-	function areaPointFirst$1(x, y) {
-	  areaStream$1.point = areaPoint$1;
-	  x00 = x0$1 = x, y00 = y0$1 = y;
-	}
+	    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]];
+	    }
 
-	function areaPoint$1(x, y) {
-	  areaRingSum$1.add(y0$1 * x - x0$1 * y);
-	  x0$1 = x, y0$1 = y;
-	}
+	    var d = dist(p, point);
 
-	function areaRingEnd$1() {
-	  areaPoint$1(x00, y00);
-	}
+	    if (d < min) {
+	      min = d;
+	      idx = i + 1;
+	      loc = projection.invert(p);
+	    }
+	  }
 
-	var x0$2 = Infinity,
-	    y0$2 = x0$2,
-	    x1 = -x0$2,
-	    y1 = x1;
-	var boundsStream$1 = {
-	  point: boundsPoint$1,
-	  lineStart: noop,
-	  lineEnd: noop,
-	  polygonStart: noop,
-	  polygonEnd: noop,
-	  result: function result() {
-	    var bounds = [[x0$2, y0$2], [x1, y1]];
-	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
-	    return bounds;
+	  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 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;
-	}
+	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 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;
-	var centroidStream$1 = {
-	  point: centroidPoint$1,
-	  lineStart: centroidLineStart$1,
-	  lineEnd: centroidLineEnd$1,
-	  polygonStart: function polygonStart() {
-	    centroidStream$1.lineStart = centroidRingStart$1;
-	    centroidStream$1.lineEnd = centroidRingEnd$1;
-	  },
-	  polygonEnd: function polygonEnd() {
-	    centroidStream$1.point = centroidPoint$1;
-	    centroidStream$1.lineStart = centroidLineStart$1;
-	    centroidStream$1.lineEnd = centroidLineEnd$1;
-	  },
-	  result: function result() {
-	    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;
-	  }
-	};
+	  for (j = 0; j < activeNodes.length - 1; j++) {
+	    n1 = activeNodes[j];
+	    n2 = activeNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
 
-	function centroidPoint$1(x, y) {
-	  X0$1 += x;
-	  Y0$1 += y;
-	  ++Z0$1;
-	}
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    }
+	  } // gather inactive segments
 
-	function centroidLineStart$1() {
-	  centroidStream$1.point = centroidPointFirstLine;
-	}
 
-	function centroidPointFirstLine(x, y) {
-	  centroidStream$1.point = centroidPointLine;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	  for (j = 0; j < inactiveNodes.length - 1; j++) {
+	    n1 = inactiveNodes[j];
+	    n2 = inactiveNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
+	    inactives.push(segment);
+	  } // test
 
-	function centroidPointLine(x, y) {
-	  var dx = x - x0$3,
-	      dy = y - y0$3,
-	      z = sqrt$1(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 centroidLineEnd$1() {
-	  centroidStream$1.point = centroidPoint$1;
-	}
+	  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);
 
-	function centroidRingStart$1() {
-	  centroidStream$1.point = centroidPointFirstRing;
-	}
+	      if (hit) {
+	        return true;
+	      }
+	    }
+	  }
 
-	function centroidRingEnd$1() {
-	  centroidPointRing(x00$1, y00$1);
-	}
+	  return false;
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test whether a way intersects with itself.
 
-	function centroidPointFirstRing(x, y) {
-	  centroidStream$1.point = centroidPointRing;
-	  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
-	}
+	function geoHasSelfIntersections(nodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k; // group active and passive segments along the nodes
 
-	function centroidPointRing(x, y) {
-	  var dx = x - x0$3,
-	      dy = y - y0$3,
-	      z = sqrt$1(dx * dx + dy * dy);
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
-	  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);
-	}
+	  for (j = 0; j < nodes.length - 1; j++) {
+	    var n1 = nodes[j];
+	    var n2 = nodes[j + 1];
+	    var segment = [n1.loc, n2.loc];
 
-	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);
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    } else {
+	      inactives.push(segment);
+	    }
+	  } // test
 
-	          this._point = 1;
-	          break;
-	        }
 
-	      case 1:
-	        {
-	          this._context.lineTo(x, y);
+	  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
 
-	          break;
-	        }
+	      if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
+	        continue;
+	      }
 
-	      default:
-	        {
-	          this._context.moveTo(x + this._radius, y);
+	      var hit = geoLineIntersection(p, q);
 
-	          this._context.arc(x, y, this._radius, 0, tau);
+	      if (hit) {
+	        var epsilon = 1e-8; // skip if the hit is at the segment's endpoint
 
-	          break;
+	        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;
 	        }
+	      }
 	    }
-	  },
-	  result: noop
-	};
-
-	var lengthSum$1 = new Adder(),
-	    lengthRing,
-	    x00$2,
-	    y00$2,
-	    x0$4,
-	    y0$4;
-	var lengthStream$1 = {
-	  point: noop,
-	  lineStart: function lineStart() {
-	    lengthStream$1.point = lengthPointFirst$1;
-	  },
-	  lineEnd: function lineEnd() {
-	    if (lengthRing) lengthPoint$1(x00$2, y00$2);
-	    lengthStream$1.point = noop;
-	  },
-	  polygonStart: function polygonStart() {
-	    lengthRing = true;
-	  },
-	  polygonEnd: function polygonEnd() {
-	    lengthRing = null;
-	  },
-	  result: function result() {
-	    var length = +lengthSum$1;
-	    lengthSum$1 = new Adder();
-	    return length;
 	  }
-	};
-
-	function lengthPointFirst$1(x, y) {
-	  lengthStream$1.point = lengthPoint$1;
-	  x00$2 = x0$4 = x, y00$2 = y0$4 = y;
-	}
-
-	function lengthPoint$1(x, y) {
-	  x0$4 -= x, y0$4 -= y;
-	  lengthSum$1.add(sqrt$1(x0$4 * x0$4 + y0$4 * y0$4));
-	  x0$4 = x, y0$4 = y;
-	}
-
-	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);
 
-	          this._point = 1;
-	          break;
-	        }
+	  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
 
-	      case 1:
-	        {
-	          this._string.push("L", x, ",", y);
+	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);
 
-	          break;
-	        }
+	  if (uNumerator && denominator) {
+	    var u = uNumerator / denominator;
+	    var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
 
-	      default:
-	        {
-	          if (this._circle == null) this._circle = circle(this._radius);
+	    if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
+	      return geoVecInterp(p, p2, t);
+	    }
+	  }
 
-	          this._string.push("M", x, ",", y, this._circle);
+	  return null;
+	}
+	function geoPathIntersections(path1, path2) {
+	  var intersections = [];
 
-	          break;
-	        }
-	    }
-	  },
-	  result: function result() {
-	    if (this._string.length) {
-	      var result = this._string.join("");
+	  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);
 
-	      this._string = [];
-	      return result;
-	    } else {
-	      return null;
+	      if (hit) {
+	        intersections.push(hit);
+	      }
 	    }
 	  }
-	};
 
-	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";
+	  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 d3_geoPath (projection, context) {
-	  var pointRadius = 4.5,
-	      projectionStream,
-	      contextStream;
-
-	  function path(object) {
-	    if (object) {
-	      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
-	      d3_geoStream(object, projectionStream(contextStream));
+	      if (hit) {
+	        return true;
+	      }
 	    }
-
-	    return contextStream.result();
 	  }
 
-	  path.area = function (object) {
-	    d3_geoStream(object, projectionStream(areaStream$1));
-	    return areaStream$1.result();
-	  };
+	  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
+	//
 
-	  path.measure = function (object) {
-	    d3_geoStream(object, projectionStream(lengthStream$1));
-	    return lengthStream$1.result();
-	  };
+	function geoPointInPolygon(point, polygon) {
+	  var x = point[0];
+	  var y = point[1];
+	  var inside = false;
 
-	  path.bounds = function (object) {
-	    d3_geoStream(object, projectionStream(boundsStream$1));
-	    return boundsStream$1.result();
-	  };
+	  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;
+	  }
 
-	  path.centroid = function (object) {
-	    d3_geoStream(object, projectionStream(centroidStream$1));
-	    return centroidStream$1.result();
-	  };
+	  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);
+	    });
+	  }
 
-	  path.projection = function (_) {
-	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
-	  };
+	  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
 
-	  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;
-	  };
+	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];
 
-	  path.pointRadius = function (_) {
-	    if (!arguments.length) return pointRadius;
-	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
-	    return path;
-	  };
+	  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();
 
-	  return path.projection(projection).context(context);
-	}
+	    if (area < minArea) {
+	      minArea = area;
+	      ssrExtent = extent;
+	      ssrAngle = angle;
+	    }
+
+	    c1 = c2;
+	  }
 
-	function d3_geoTransform (methods) {
 	  return {
-	    stream: transformer(methods)
+	    poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
+	    angle: ssrAngle
 	  };
 	}
-	function transformer(methods) {
-	  return function (stream) {
-	    var s = new TransformStream();
+	function geoPathLength(path) {
+	  var length = 0;
 
-	    for (var key in methods) {
-	      s[key] = methods[key];
-	    }
+	  for (var i = 0; i < path.length - 1; i++) {
+	    length += geoVecLength(path[i], path[i + 1]);
+	  }
 
-	    s.stream = stream;
-	    return s;
-	  };
-	}
+	  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 TransformStream() {}
+	function geoViewportEdge(point, dimensions) {
+	  var pad = [80, 20, 50, 20]; // top, right, bottom, left
 
-	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();
+	  var x = 0;
+	  var y = 0;
+
+	  if (point[0] > dimensions[0] - pad[1]) {
+	    x = -10;
 	  }
-	};
 
-	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;
-	}
+	  if (point[0] < pad[3]) {
+	    x = 10;
+	  }
 
-	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);
+	  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;
+	  }
 	}
 
-	var maxDepth = 16,
-	    // maximum depth of subdivision
-	cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
+	var noop = {
+	  value: function value() {}
+	};
 
-	function resample (project, delta2) {
-	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
+	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] = [];
+	  }
+
+	  return new Dispatch(_);
 	}
 
-	function resampleNone(project) {
-	  return transformer({
-	    point: function point(x, y) {
-	      x = project(x, y);
-	      this.stream.point(x[0], x[1]);
-	    }
-	  });
+	function Dispatch(_) {
+	  this._ = _;
 	}
 
-	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 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
+	    };
+	  });
+	}
 
-	    if (d2 > 4 * delta2 && depth--) {
-	      var a = a0 + a1,
-	          b = b0 + b1,
-	          c = c0 + c1,
-	          m = sqrt$1(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;
+	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 (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);
+	    if (arguments.length < 2) {
+	      while (++i < n) {
+	        if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;
 	      }
-	    }
-	  }
 
-	  return function (stream) {
-	    var lambda00, x00, y00, a00, b00, c00, // first point
-	    lambda0, x0, y0, a0, b0, c0; // previous point
+	      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.
 
-	    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]);
-	    }
+	    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
 
-	    function lineStart() {
-	      x0 = NaN;
-	      resampleStream.point = linePoint;
-	      stream.lineStart();
+	    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);
+	      }
 	    }
 
-	    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 this;
+	  },
+	  copy: function copy() {
+	    var copy = {},
+	        _ = this._;
 
-	    function lineEnd() {
-	      resampleStream.point = point;
-	      stream.lineEnd();
+	    for (var t in _) {
+	      copy[t] = _[t].slice();
 	    }
 
-	    function ringStart() {
-	      lineStart();
-	      resampleStream.point = ringPoint;
-	      resampleStream.lineEnd = ringEnd;
+	    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 ringPoint(lambda, phi) {
-	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
-	      resampleStream.point = linePoint;
+	    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);
 
-	    function ringEnd() {
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
-	      resampleStream.lineEnd = lineEnd;
-	      lineEnd();
+	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
 	    }
+	  }
+	};
 
-	    return resampleStream;
-	  };
+	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;
+	    }
+	  }
 	}
 
-	var transformRadians = transformer({
-	  point: function point(x, y) {
-	    this.stream.point(x * radians, y * radians);
+	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 transformRotate(rotate) {
-	  return transformer({
-	    point: function point(x, y) {
-	      var r = rotate(x, y);
-	      return this.stream.point(r[0], r[1]);
-	    }
+	  if (callback != null) type.push({
+	    name: name,
+	    value: callback
 	  });
+	  return type;
 	}
 
-	function scaleTranslate(k, dx, dy, sx, sy) {
-	  function transform(x, y) {
-	    x *= sx;
-	    y *= sy;
-	    return [dx + k * x, dy - k * y];
-	  }
+	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/"
+	};
 
-	  transform.invert = function (x, y) {
-	    return [(x - dx) / k * sx, (dy - y) / k * sy];
+	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
+	}
+
+	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);
 	  };
+	}
 
-	  return transform;
+	function creatorFixed(fullname) {
+	  return function () {
+	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+	  };
 	}
 
-	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 creator (name) {
+	  var fullname = namespace(name);
+	  return (fullname.local ? creatorFixed : creatorInherit)(fullname);
+	}
 
-	  function transform(x, y) {
-	    x *= sx;
-	    y *= sy;
-	    return [a * x - b * y + dx, dy - b * x - a * y];
-	  }
+	function none() {}
 
-	  transform.invert = function (x, y) {
-	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
+	function selector (selector) {
+	  return selector == null ? none : function () {
+	    return this.querySelector(selector);
 	  };
-
-	  return transform;
 	}
 
-	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,
-	      // post-clip extent
-	  delta2 = 0.5,
-	      // precision
-	  projectResample,
-	      projectTransform,
-	      projectRotateTransform,
-	      cache,
-	      cacheStream;
+	function selection_select (select) {
+	  if (typeof select !== "function") select = selector(select);
 
-	  function projection(point) {
-	    return projectRotateTransform(point[0] * radians, point[1] * radians);
+	  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;
+	      }
+	    }
 	  }
 
-	  function invert(point) {
-	    point = projectRotateTransform.invert(point[0], point[1]);
-	    return point && [point[0] * degrees, point[1] * degrees];
-	  }
+	  return new Selection$1(subgroups, this._parents);
+	}
 
-	  projection.stream = function (stream) {
-	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
-	  };
+	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
+	}
 
-	  projection.preclip = function (_) {
-	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
-	  };
+	function empty() {
+	  return [];
+	}
 
-	  projection.postclip = function (_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	function selectorAll (selector) {
+	  return selector == null ? empty : function () {
+	    return this.querySelectorAll(selector);
 	  };
+	}
 
-	  projection.clipAngle = function (_) {
-	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
+	function arrayAll(select) {
+	  return function () {
+	    var group = select.apply(this, arguments);
+	    return group == null ? [] : array(group);
 	  };
+	}
 
-	  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]];
-	  };
+	function selection_selectAll (select) {
+	  if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);
 
-	  projection.scale = function (_) {
-	    return arguments.length ? (k = +_, recenter()) : k;
-	  };
+	  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);
+	      }
+	    }
+	  }
 
-	  projection.translate = function (_) {
-	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
-	  };
+	  return new Selection$1(subgroups, parents);
+	}
 
-	  projection.center = function (_) {
-	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
-	  };
+	var $$u = _export;
+	var $find = arrayIteration.find;
+	var addToUnscopables$3 = addToUnscopables$6;
 
-	  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];
-	  };
+	var FIND = 'find';
+	var SKIPS_HOLES$1 = true;
 
-	  projection.angle = function (_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
-	  };
+	// Shouldn't skip holes
+	if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });
 
-	  projection.reflectX = function (_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
-	  };
+	// `Array.prototype.find` method
+	// https://tc39.es/ecma262/#sec-array.prototype.find
+	$$u({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
+	  find: function find(callbackfn /* , that = undefined */) {
+	    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	  projection.reflectY = function (_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
-	  };
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$3(FIND);
 
-	  projection.precision = function (_) {
-	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2);
+	function matcher (selector) {
+	  return function () {
+	    return this.matches(selector);
 	  };
-
-	  projection.fitExtent = function (extent, object) {
-	    return fitExtent(projection, extent, object);
+	}
+	function childMatcher(selector) {
+	  return function (node) {
+	    return node.matches(selector);
 	  };
+	}
 
-	  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);
-	  };
-
-	  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 reset() {
-	    cache = cacheStream = null;
-	    return projection;
-	  }
+	var find = Array.prototype.find;
 
+	function childFind(match) {
 	  return function () {
-	    project = projectAt.apply(this, arguments);
-	    projection.invert = project.invert && invert;
-	    return recenter();
+	    return find.call(this.children, match);
 	  };
 	}
 
-	function mercatorRaw(lambda, phi) {
-	  return [lambda, log$1(tan((halfPi + phi) / 2))];
+	function childFirst() {
+	  return this.firstElementChild;
 	}
 
-	mercatorRaw.invert = function (x, y) {
-	  return [x, 2 * atan(exp(y)) - halfPi];
-	};
-
-	function mercator () {
-	  return mercatorProjection(mercatorRaw).scale(961 / tau);
+	function selection_selectChild (match) {
+	  return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
 	}
-	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
 
-	  m.scale = function (_) {
-	    return arguments.length ? (scale(_), reclip()) : scale();
-	  };
+	var filter = Array.prototype.filter;
 
-	  m.translate = function (_) {
-	    return arguments.length ? (translate(_), reclip()) : translate();
-	  };
+	function children() {
+	  return this.children;
+	}
 
-	  m.center = function (_) {
-	    return arguments.length ? (center(_), reclip()) : center();
+	function childrenFilter(match) {
+	  return function () {
+	    return filter.call(this.children, match);
 	  };
+	}
 
-	  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 selection_selectChildren (match) {
+	  return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+	}
 
-	  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)]]);
+	function selection_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
+
+	  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 reclip();
+	  return new Selection$1(subgroups, this._parents);
 	}
 
-	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 point(x, y) {
-	      var p = projection([x, y]);
-	      this.stream.point(p[0], p[1]);
-	    }
-	  }),
-	      postclip = identity,
-	      cache,
-	      cacheStream;
+	function sparse (update) {
+	  return new Array(update.length);
+	}
 
-	  function reset() {
-	    kx = k * sx;
-	    ky = k * sy;
-	    cache = cacheStream = null;
-	    return projection;
+	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);
 	  }
+	};
 
-	  function projection(p) {
-	    var x = p[0] * kx,
-	        y = p[1] * ky;
+	function constant$3 (x) {
+	  return function () {
+	    return x;
+	  };
+	}
 
-	    if (alpha) {
-	      var t = y * ca - x * sa;
-	      x = x * ca + y * sa;
-	      y = t;
-	    }
+	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.
 
-	    return [x + tx, y + ty];
-	  }
+	  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.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;
+	  for (; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      exit[i] = node;
 	    }
+	  }
+	}
 
-	    return [x / kx, y / ky];
-	  };
+	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.
 
-	  projection.stream = function (stream) {
-	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
-	  };
+	  for (i = 0; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";
 
-	  projection.postclip = function (_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
+	      if (nodeByKeyValue.has(keyValue)) {
+	        exit[i] = node;
+	      } else {
+	        nodeByKeyValue.set(keyValue, node);
+	      }
+	    }
+	  } // 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.
 
-	  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;
-	  };
+	  for (i = 0; i < dataLength; ++i) {
+	    keyValue = key.call(parent, data[i], i, data) + "";
 
-	  projection.translate = function (_) {
-	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
-	  };
+	    if (node = nodeByKeyValue.get(keyValue)) {
+	      update[i] = node;
+	      node.__data__ = data[i];
+	      nodeByKeyValue["delete"](keyValue);
+	    } else {
+	      enter[i] = new EnterNode(parent, data[i]);
+	    }
+	  } // Add any remaining nodes that were not bound to data to exit.
 
-	  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;
-	  };
+	  for (i = 0; i < groupLength; ++i) {
+	    if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
+	      exit[i] = node;
+	    }
+	  }
+	}
 
-	  projection.reflectY = function (_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
-	  };
+	function datum(node) {
+	  return node.__data__;
+	}
 
-	  projection.fitExtent = function (extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
+	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);
 
-	  projection.fitSize = function (size, object) {
-	    return fitSize(projection, size, object);
-	  };
+	  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.
 
-	  projection.fitWidth = function (width, object) {
-	    return fitWidth(projection, width, object);
-	  };
+	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+	      if (previous = enterGroup[i0]) {
+	        if (i0 >= i1) i1 = i0 + 1;
 
-	  projection.fitHeight = function (height, object) {
-	    return fitHeight(projection, height, object);
-	  };
+	        while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
+	        }
 
-	  return projection;
-	}
+	        previous._next = next || null;
+	      }
+	    }
+	  }
 
-	// 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 geoLonToMeters(dLon, atLat) {
-	  return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
-	}
-	function geoMetersToLat(m) {
-	  return m / (TAU * POLAR_RADIUS / 360);
-	}
-	function geoMetersToLon(m, atLat) {
-	  return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
-	}
-	function geoMetersToOffset(meters, tileSize) {
-	  tileSize = tileSize || 256;
-	  return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS)];
+	  update = new Selection$1(update, parents);
+	  update._enter = enter;
+	  update._exit = exit;
+	  return update;
 	}
-	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 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 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 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`
+	function selection_exit () {
+	  return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
+	}
 
-	function geoSphericalClosestNode(nodes, point) {
-	  var minDistance = Infinity,
-	      distance;
-	  var indexOfMin;
+	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 in nodes) {
-	    distance = geoSphericalDistance(nodes[i].loc, point);
+	function selection_merge (selection) {
+	  if (!(selection instanceof Selection$1)) throw new Error("invalid merge");
 
-	    if (distance < minDistance) {
-	      minDistance = distance;
-	      indexOfMin = i;
+	  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 (indexOfMin !== undefined) {
-	    return {
-	      index: indexOfMin,
-	      distance: minDistance,
-	      node: nodes[indexOfMin]
-	    };
-	  } else {
-	    return null;
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
 	  }
-	}
 
-	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];
-	  }
+	  return new Selection$1(merges, this._parents);
 	}
-	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;
+	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 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(',');
 	  }
-	});
 
-	var $every$1 = arrayIteration.every;
+	  return this;
+	}
 
+	function selection_sort (compare) {
+	  if (!compare) compare = ascending;
 
+	  function compareNode(a, b) {
+	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+	  }
 
-	var STRICT_METHOD$6 = arrayMethodIsStrict('every');
-	var USES_TO_LENGTH$8 = arrayMethodUsesToLength('every');
+	  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;
+	      }
+	    }
 
-	// `Array.prototype.every` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.every
-	_export({ target: 'Array', proto: true, forced: !STRICT_METHOD$6 || !USES_TO_LENGTH$8 }, {
-	  every: function every(callbackfn /* , thisArg */) {
-	    return $every$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	    sortgroup.sort(compareNode);
 	  }
-	});
 
-	var $reduce$1 = arrayReduce.left;
+	  return new Selection$1(sortgroups, this._parents).order();
+	}
 
+	function ascending(a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+	}
 
+	function selection_call () {
+	  var callback = arguments[0];
+	  arguments[0] = this;
+	  callback.apply(null, arguments);
+	  return this;
+	}
 
-	var STRICT_METHOD$7 = arrayMethodIsStrict('reduce');
-	var USES_TO_LENGTH$9 = arrayMethodUsesToLength('reduce', { 1: 0 });
+	function selection_nodes () {
+	  return Array.from(this);
+	}
 
-	// `Array.prototype.reduce` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.reduce
-	_export({ target: 'Array', proto: true, forced: !STRICT_METHOD$7 || !USES_TO_LENGTH$9 }, {
-	  reduce: function reduce(callbackfn /* , initialValue */) {
-	    return $reduce$1(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	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_polygonArea (polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      a,
-	      b = polygon[n - 1],
-	      area = 0;
+	  return null;
+	}
 
-	  while (++i < n) {
-	    a = b;
-	    b = polygon[i];
-	    area += a[1] * b[0] - a[0] * b[1];
-	  }
+	function selection_size () {
+	  var size = 0;
 
-	  return area / 2;
-	}
+	  var _iterator = _createForOfIteratorHelper(this),
+	      _step;
 
-	function d3_polygonCentroid (polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      x = 0,
-	      y = 0,
-	      a,
-	      b = polygon[n - 1],
-	      c,
-	      k = 0;
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var node = _step.value;
+	      ++size;
+	    } // eslint-disable-line no-unused-vars
 
-	  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;
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
 	  }
 
-	  return k *= 3, [x / k, y / k];
+	  return size;
 	}
 
-	// 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]);
+	function selection_empty () {
+	  return !this.node();
 	}
 
-	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.
-
-
-	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;
+	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);
 	    }
-
-	    indexes[size++] = i;
 	  }
 
-	  return indexes.slice(0, size); // remove popped points
+	  return this;
 	}
 
-	function d3_polygonHull (points) {
-	  if ((n = points.length) < 3) return null;
-	  var i,
-	      n,
-	      sortedPoints = new Array(n),
-	      flippedPoints = new Array(n);
+	function attrRemove$1(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
+	}
 
-	  for (i = 0; i < n; ++i) {
-	    sortedPoints[i] = [+points[i][0], +points[i][1], i];
-	  }
+	function attrRemoveNS$1(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
-	  sortedPoints.sort(lexicographicOrder);
+	function attrConstant$1(name, value) {
+	  return function () {
+	    this.setAttribute(name, value);
+	  };
+	}
 
-	  for (i = 0; i < n; ++i) {
-	    flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
-	  }
+	function attrConstantNS$1(fullname, value) {
+	  return function () {
+	    this.setAttributeNS(fullname.space, fullname.local, value);
+	  };
+	}
 
-	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
-	      lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.
+	function attrFunction$1(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
+	  };
+	}
 
-	  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 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);
+	  };
+	}
 
-	  for (i = upperIndexes.length - 1; i >= 0; --i) {
-	    hull.push(points[sortedPoints[upperIndexes[i]][2]]);
-	  }
+	function selection_attr (name, value) {
+	  var fullname = namespace(name);
 
-	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
-	    hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+	  if (arguments.length < 2) {
+	    var node = this.node();
+	    return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
 	  }
 
-	  return hull;
+	  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));
 	}
 
-	// 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 geoVecAdd(a, b) {
-	  return [a[0] + b[0], a[1] + b[1]];
-	} // vector subtraction
-
-	function geoVecSubtract(a, b) {
-	  return [a[0] - b[0], a[1] - b[1]];
-	} // vector scaling
-
-	function geoVecScale(a, mag) {
-	  return [a[0] * mag, a[1] * mag];
-	} // vector rounding (was: geoRoundCoordinates)
+	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
+	}
 
-	function geoVecFloor(a) {
-	  return [Math.floor(a[0]), Math.floor(a[1])];
-	} // linear interpolation
+	function styleRemove$1(name) {
+	  return function () {
+	    this.style.removeProperty(name);
+	  };
+	}
 
-	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 styleConstant$1(name, value, priority) {
+	  return function () {
+	    this.style.setProperty(name, value, priority);
+	  };
+	}
 
-	function geoVecLength(a, b) {
-	  return Math.sqrt(geoVecLengthSquare(a, b));
-	} // length of vector raised to the power two
+	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);
+	  };
+	}
 
-	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 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);
+	}
 
-	function geoVecNormalize(a) {
-	  var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
+	function propertyRemove(name) {
+	  return function () {
+	    delete this[name];
+	  };
+	}
 
-	  if (length !== 0) {
-	    return geoVecScale(a, 1 / length);
-	  }
+	function propertyConstant(name, value) {
+	  return function () {
+	    this[name] = 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 propertyFunction(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) delete this[name];else this[name] = v;
+	  };
+	}
 
-	function geoVecAngle(a, b) {
-	  return Math.atan2(b[1] - a[1], b[0] - a[0]);
-	} // dot product
+	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 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 classArray(string) {
+	  return string.trim().split(/^|\s+/);
+	}
 
-	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 classList(node) {
+	  return node.classList || new ClassList(node);
+	}
 
-	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 ClassList(node) {
+	  this._node = node;
+	  this._names = classArray(node.getAttribute("class") || "");
+	}
 
-	function geoVecProject(a, points) {
-	  var min = Infinity;
-	  var idx;
-	  var target;
+	ClassList.prototype = {
+	  add: function add(name) {
+	    var i = this._names.indexOf(name);
 
-	  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 (i < 0) {
+	      this._names.push(name);
 
-	    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]];
+	      this._node.setAttribute("class", this._names.join(" "));
 	    }
+	  },
+	  remove: function remove(name) {
+	    var i = this._names.indexOf(name);
 
-	    var dist = geoVecLength(p, a);
+	    if (i >= 0) {
+	      this._names.splice(i, 1);
 
-	    if (dist < min) {
-	      min = dist;
-	      idx = i + 1;
-	      target = p;
+	      this._node.setAttribute("class", this._names.join(" "));
 	    }
+	  },
+	  contains: function contains(name) {
+	    return this._names.indexOf(name) >= 0;
 	  }
+	};
 
-	  if (idx !== undefined) {
-	    return {
-	      index: idx,
-	      distance: min,
-	      target: target
-	    };
-	  } else {
-	    return null;
+	function classedAdd(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
+
+	  while (++i < n) {
+	    list.add(names[i]);
 	  }
 	}
 
-	// between the positive X axis and the line intersecting a and b.
+	function classedRemove(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
 
-	function geoAngle(a, b, projection) {
-	  return geoVecAngle(projection(a.loc), projection(b.loc));
+	  while (++i < n) {
+	    list.remove(names[i]);
+	  }
 	}
-	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
 
-	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.
+	function classedTrue(names) {
+	  return function () {
+	    classedAdd(this, names);
+	  };
+	}
 
-	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;
+	function classedFalse(names) {
+	  return function () {
+	    classedRemove(this, names);
+	  };
+	}
 
-	  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;
+	function classedFunction(names, value) {
+	  return function () {
+	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+	  };
+	}
 
-	    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]];
-	    }
+	function selection_classed (name, value) {
+	  var names = classArray(name + "");
 
-	    var d = dist(p, point);
+	  if (arguments.length < 2) {
+	    var list = classList(this.node()),
+	        i = -1,
+	        n = names.length;
 
-	    if (d < min) {
-	      min = d;
-	      idx = i + 1;
-	      loc = projection.invert(p);
+	    while (++i < n) {
+	      if (!list.contains(names[i])) return false;
 	    }
-	  }
 
-	  if (idx !== undefined) {
-	    return {
-	      index: idx,
-	      distance: min,
-	      loc: loc
-	    };
-	  } else {
-	    return null;
+	    return true;
 	  }
-	} // 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];
+	  return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
+	}
 
-	    if (n1.id === activeID || n2.id === activeID) {
-	      actives.push(segment);
-	    }
-	  } // gather inactive segments
+	function textRemove() {
+	  this.textContent = "";
+	}
 
+	function textConstant$1(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
+	}
 
-	  for (j = 0; j < inactiveNodes.length - 1; j++) {
-	    n1 = inactiveNodes[j];
-	    n2 = inactiveNodes[j + 1];
-	    segment = [n1.loc, n2.loc];
-	    inactives.push(segment);
-	  } // test
+	function textFunction$1(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.textContent = v == null ? "" : v;
+	  };
+	}
 
+	function selection_text (value) {
+	  return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
+	}
 
-	  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);
+	function htmlRemove() {
+	  this.innerHTML = "";
+	}
 
-	      if (hit) {
-	        return true;
-	      }
-	    }
-	  }
+	function htmlConstant(value) {
+	  return function () {
+	    this.innerHTML = value;
+	  };
+	}
 
-	  return false;
-	} // Test active (dragged or drawing) segments against inactive segments
-	// This is used to test whether a way intersects with itself.
+	function htmlFunction(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.innerHTML = v == null ? "" : v;
+	  };
+	}
 
-	function geoHasSelfIntersections(nodes, activeID) {
-	  var actives = [];
-	  var inactives = [];
-	  var j, k; // group active and passive segments along the nodes
+	function selection_html (value) {
+	  return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
+	}
 
-	  for (j = 0; j < nodes.length - 1; j++) {
-	    var n1 = nodes[j];
-	    var n2 = nodes[j + 1];
-	    var segment = [n1.loc, n2.loc];
+	function raise() {
+	  if (this.nextSibling) this.parentNode.appendChild(this);
+	}
 
-	    if (n1.id === activeID || n2.id === activeID) {
-	      actives.push(segment);
-	    } else {
-	      inactives.push(segment);
-	    }
-	  } // test
+	function selection_raise () {
+	  return this.each(raise);
+	}
 
+	function lower() {
+	  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+	}
 
-	  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 selection_lower () {
+	  return this.each(lower);
+	}
 
-	      if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
-	        continue;
-	      }
+	function selection_append (name) {
+	  var create = typeof name === "function" ? name : creator(name);
+	  return this.select(function () {
+	    return this.appendChild(create.apply(this, arguments));
+	  });
+	}
 
-	      var hit = geoLineIntersection(p, q);
+	function constantNull() {
+	  return null;
+	}
 
-	      if (hit) {
-	        var epsilon = 1e-8; // skip if the hit is at the segment's endpoint
+	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);
+	  });
+	}
 
-	        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;
-	        }
-	      }
-	    }
-	  }
+	function remove$7() {
+	  var parent = this.parentNode;
+	  if (parent) parent.removeChild(this);
+	}
 
-	  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 selection_remove () {
+	  return this.each(remove$7);
+	}
 
-	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 (uNumerator && denominator) {
-	    var u = uNumerator / denominator;
-	    var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
-
-	    if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
-	      return geoVecInterp(p, p2, t);
-	    }
-	  }
-
-	  return null;
-	}
-	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);
-	      }
-	    }
-	  }
-
-	  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);
-
-	      if (hit) {
-	        return true;
-	      }
-	    }
-	  }
-
-	  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 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 selection_cloneShallow() {
+	  var clone = this.cloneNode(false),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 	}
-	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
-	  function testPoints(outer, inner) {
-	    return inner.some(function (point) {
-	      return geoPointInPolygon(point, outer);
-	    });
-	  }
-
-	  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 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;
-	  }
 
-	  return {
-	    poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
-	    angle: ssrAngle
-	  };
+	function selection_cloneDeep() {
+	  var clone = this.cloneNode(true),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 	}
-	function geoPathLength(path) {
-	  var length = 0;
-
-	  for (var i = 0; i < path.length - 1; i++) {
-	    length += geoVecLength(path[i], path[i + 1]);
-	  }
-
-	  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 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;
-	  }
+	function selection_clone (deep) {
+	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
 	}
 
-	var noop$1 = {
-	  value: function value() {}
-	};
-
-	function dispatch() {
-	  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] = [];
-	  }
-
-	  return new Dispatch$1(_);
+	function selection_datum (value) {
+	  return arguments.length ? this.property("__data__", value) : this.node().__data__;
 	}
 
-	function Dispatch$1(_) {
-	  this._ = _;
+	function contextListener(listener) {
+	  return function (event) {
+	    listener.call(this, event, this.__data__);
+	  };
 	}
 
-	function parseTypenames(typenames, types) {
+	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);
-	    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
 	    return {
 	      type: t,
 	      name: name
@@ -12999,11724 +14527,26102 @@
 	  });
 	}
 
-	Dispatch$1.prototype = dispatch.prototype = {
-	  constructor: Dispatch$1,
-	  on: function on(typename, callback) {
-	    var _ = this._,
-	        T = parseTypenames(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$3(_[t], typename.name))) return t;
-	      }
-
-	      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 (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+	function onRemove(typename) {
+	  return function () {
+	    var on = this.__on;
+	    if (!on) return;
 
-	    while (++i < n) {
-	      if (t = (typename = T[i]).type) _[t] = set$3(_[t], typename.name, callback);else if (callback == null) for (t in _) {
-	        _[t] = set$3(_[t], typename.name, null);
+	    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;
 	      }
 	    }
 
-	    return this;
-	  },
-	  copy: function copy() {
-	    var copy = {},
-	        _ = this._;
+	    if (++i) on.length = i;else delete this.__on;
+	  };
+	}
 
-	    for (var t in _) {
-	      copy[t] = _[t].slice();
+	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;
+	      }
 	    }
+	    this.addEventListener(typename.type, listener, options);
+	    o = {
+	      type: typename.type,
+	      name: typename.name,
+	      value: value,
+	      listener: listener,
+	      options: options
+	    };
+	    if (!on) this.__on = [o];else on.push(o);
+	  };
+	}
 
-	    return new Dispatch$1(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 selection_on (typename, value, options) {
+	  var typenames = parseTypenames(typename + ""),
+	      i,
+	      n = typenames.length,
+	      t;
 
-	    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);
+	  if (arguments.length < 2) {
+	    var on = this.node().__on;
 
-	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
-	      t[i].value.apply(that, args);
+	    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 get$3(type, name) {
-	  for (var i = 0, n = type.length, c; i < n; ++i) {
-	    if ((c = type[i]).name === name) {
-	      return c.value;
-	    }
-	  }
-	}
+	  on = value ? onAdd : onRemove;
 
-	function set$3(type, name, callback) {
-	  for (var i = 0, n = type.length; i < n; ++i) {
-	    if (type[i].name === name) {
-	      type[i] = noop$1, type = type.slice(0, i).concat(type.slice(i + 1));
-	      break;
-	    }
+	  for (i = 0; i < n; ++i) {
+	    this.each(on(typenames[i], value, options));
 	  }
 
-	  if (callback != null) type.push({
-	    name: name,
-	    value: callback
-	  });
-	  return type;
+	  return this;
 	}
 
-	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 dispatchEvent(node, type, params) {
+	  var window = defaultView(node),
+	      event = window.CustomEvent;
 
-	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
+	  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);
+	  }
+
+	  node.dispatchEvent(event);
 	}
 
-	function creatorInherit(name) {
+	function dispatchConstant(type, params) {
 	  return function () {
-	    var document = this.ownerDocument,
-	        uri = this.namespaceURI;
-	    return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
+	    return dispatchEvent(this, type, params);
 	  };
 	}
 
-	function creatorFixed(fullname) {
+	function dispatchFunction(type, params) {
 	  return function () {
-	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+	    return dispatchEvent(this, type, params.apply(this, arguments));
 	  };
 	}
 
-	function creator (name) {
-	  var fullname = namespace(name);
-	  return (fullname.local ? creatorFixed : creatorInherit)(fullname);
+	function selection_dispatch (type, params) {
+	  return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
 	}
 
-	function none() {}
+	var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
 
-	function selector (selector) {
-	  return selector == null ? none : function () {
-	    return this.querySelector(selector);
-	  };
-	}
+	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;
 
-	function selection_select (select) {
-	  if (typeof select !== "function") select = selector(select);
+	        case 1:
+	          if (!(j < m)) {
+	            _context.next = 13;
+	            break;
+	          }
 
-	  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;
+	          group = groups[j], i = 0, n = group.length;
+
+	        case 3:
+	          if (!(i < n)) {
+	            _context.next = 10;
+	            break;
+	          }
+
+	          if (!(node = group[i])) {
+	            _context.next = 7;
+	            break;
+	          }
+
+	          _context.next = 7;
+	          return node;
+
+	        case 7:
+	          ++i;
+	          _context.next = 3;
+	          break;
+
+	        case 10:
+	          ++j;
+	          _context.next = 1;
+	          break;
+
+	        case 13:
+	        case "end":
+	          return _context.stop();
 	      }
 	    }
-	  }
-
-	  return new Selection(subgroups, this._parents);
+	  }, _marked$1, this);
 	}
 
-	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
+	var root$1 = [null];
+	function Selection$1(groups, parents) {
+	  this._groups = groups;
+	  this._parents = parents;
 	}
 
-	function empty() {
-	  return [];
+	function selection() {
+	  return new Selection$1([[document.documentElement]], root$1);
 	}
 
-	function selectorAll (selector) {
-	  return selector == null ? empty : function () {
-	    return this.querySelectorAll(selector);
-	  };
+	function selection_selection() {
+	  return this;
 	}
 
-	function arrayAll(select) {
-	  return function () {
-	    var group = select.apply(this, arguments);
-	    return group == null ? [] : array(group);
-	  };
+	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);
+
+	function select (selector) {
+	  return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
 	}
 
-	function selection_selectAll (select) {
-	  if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);
+	function sourceEvent (event) {
+	  var sourceEvent;
 
-	  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 (sourceEvent = event.sourceEvent) {
+	    event = sourceEvent;
 	  }
 
-	  return new Selection(subgroups, parents);
+	  return event;
 	}
 
-	var $find$1 = arrayIteration.find;
-
-
-
-	var FIND = 'find';
-	var SKIPS_HOLES = true;
+	function pointer (event, node) {
+	  event = sourceEvent(event);
+	  if (node === undefined) node = event.currentTarget;
 
-	var USES_TO_LENGTH$a = arrayMethodUsesToLength(FIND);
+	  if (node) {
+	    var svg = node.ownerSVGElement || node;
 
-	// Shouldn't skip holes
-	if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });
+	    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];
+	    }
 
-	// `Array.prototype.find` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.find
-	_export({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH$a }, {
-	  find: function find(callbackfn /* , that = undefined */) {
-	    return $find$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	    if (node.getBoundingClientRect) {
+	      var rect = node.getBoundingClientRect();
+	      return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+	    }
 	  }
-	});
-
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-	addToUnscopables(FIND);
 
-	function matcher (selector) {
-	  return function () {
-	    return this.matches(selector);
-	  };
-	}
-	function childMatcher(selector) {
-	  return function (node) {
-	    return node.matches(selector);
-	  };
+	  return [event.pageX, event.pageY];
 	}
 
-	var find$1 = Array.prototype.find;
-
-	function childFind(match) {
-	  return function () {
-	    return find$1.call(this.children, match);
-	  };
+	function selectAll (selector) {
+	  return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
 	}
 
-	function childFirst() {
-	  return this.firstElementChild;
+	function nopropagation$1(event) {
+	  event.stopImmediatePropagation();
 	}
-
-	function selection_selectChild (match) {
-	  return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
+	function noevent$1 (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
 	}
 
-	var filter = Array.prototype.filter;
+	function dragDisable (view) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", noevent$1, true);
 
-	function children() {
-	  return this.children;
+	  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);
 
-	function childrenFilter(match) {
-	  return function () {
-	    return filter.call(this.children, match);
-	  };
-	}
+	  if (noclick) {
+	    selection.on("click.drag", noevent$1, true);
+	    setTimeout(function () {
+	      selection.on("click.drag", null);
+	    }, 0);
+	  }
 
-	function selection_selectChildren (match) {
-	  return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", null);
+	  } else {
+	    root.style.MozUserSelect = root.__noselect;
+	    delete root.__noselect;
+	  }
 	}
 
-	function selection_filter (match) {
-	  if (typeof match !== "function") match = matcher(match);
+	var constant$2 = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	  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);
-	      }
+	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
 	    }
-	  }
-
-	  return new Selection(subgroups, this._parents);
+	  });
 	}
 
-	function sparse (update) {
-	  return new Array(update.length);
+	DragEvent.prototype.on = function () {
+	  var value = this._.on.apply(this._, arguments);
+
+	  return value === this._ ? this : value;
+	};
+
+	function defaultFilter$2(event) {
+	  return !event.ctrlKey && !event.button;
 	}
 
-	function selection_enter () {
-	  return new Selection(this._enter || this._groups.map(sparse), this._parents);
+	function defaultContainer() {
+	  return this.parentNode;
 	}
-	function EnterNode(parent, datum) {
-	  this.ownerDocument = parent.ownerDocument;
-	  this.namespaceURI = parent.namespaceURI;
-	  this._next = null;
-	  this._parent = parent;
-	  this.__data__ = datum;
+
+	function defaultSubject(event, d) {
+	  return d == null ? {
+	    x: event.x,
+	    y: event.y
+	  } : d;
 	}
-	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);
-	  }
-	};
 
-	function constant (x) {
-	  return function () {
-	    return x;
-	  };
+	function defaultTouchable$1() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
 	}
 
-	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.
+	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;
 
-	  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.
+	  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(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);
+	  }
 
-	  for (; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      exit[i] = node;
+	  function mousemoved(event) {
+	    noevent$1(event);
+
+	    if (!mousemoving) {
+	      var dx = event.clientX - mousedownx,
+	          dy = event.clientY - mousedowny;
+	      mousemoving = dx * dx + dy * dy > clickDistance2;
 	    }
+
+	    gestures.mouse("drag", event);
 	  }
-	}
 
-	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.
+	  function mouseupped(event) {
+	    select(event.view).on("mousemove.drag mouseup.drag", null);
+	    yesdrag(event.view, mousemoving);
+	    noevent$1(event);
+	    gestures.mouse("end", event);
+	  }
 
-	  for (i = 0; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";
+	  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;
 
-	      if (nodeByKeyValue.has(keyValue)) {
-	        exit[i] = node;
-	      } else {
-	        nodeByKeyValue.set(keyValue, node);
+	    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]);
 	      }
 	    }
-	  } // 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 = key.call(parent, data[i], i, data) + "";
+	  function touchmoved(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
 
-	    if (node = nodeByKeyValue.get(keyValue)) {
-	      update[i] = node;
-	      node.__data__ = data[i];
-	      nodeByKeyValue["delete"](keyValue);
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        noevent$1(event);
+	        gesture("drag", event, touches[i]);
+	      }
 	    }
-	  } // Add any remaining nodes that were not bound to data to exit.
+	  }
 
+	  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!
 
-	  for (i = 0; i < groupLength; ++i) {
-	    if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
-	      exit[i] = node;
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        nopropagation$1(event);
+	        gesture("end", event, touches[i]);
+	      }
 	    }
 	  }
-	}
-
-	function datum(node) {
-	  return node.__data__;
-	}
-
-	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(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.
+	  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;
 
-	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
-	      if (previous = enterGroup[i0]) {
-	        if (i0 >= i1) i1 = i0 + 1;
+	      switch (type) {
+	        case "start":
+	          gestures[identifier] = gesture, n = active++;
+	          break;
 
-	        while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
-	        }
+	        case "end":
+	          delete gestures[identifier], --active;
+	        // nobreak
 
-	        previous._next = next || null;
+	        case "drag":
+	          p = pointer(touch || event, container), n = active;
+	          break;
 	      }
-	    }
+
+	      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);
+	    };
 	  }
 
-	  update = new Selection(update, parents);
-	  update._enter = enter;
-	  update._exit = exit;
-	  return update;
-	}
+	  drag.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
+	  };
 
-	function selection_exit () {
-	  return new Selection(this._exit || this._groups.map(sparse), this._parents);
-	}
+	  drag.container = function (_) {
+	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
+	  };
 
-	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;
-	}
+	  drag.subject = function (_) {
+	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
+	  };
 
-	function selection_merge (selection) {
-	  if (!(selection instanceof Selection)) throw new Error("invalid merge");
+	  drag.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
+	  };
 
-	  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;
-	      }
-	    }
-	  }
+	  drag.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? drag : value;
+	  };
 
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
-	  }
+	  drag.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+	  };
 
-	  return new Selection(merges, this._parents);
+	  return drag;
 	}
 
-	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;
-	      }
-	    }
-	  }
+	var DESCRIPTORS$4 = descriptors;
+	var global$b = global$1o;
+	var uncurryThis$e = functionUncurryThis;
+	var isForced$1 = isForced_1;
+	var inheritIfRequired$1 = inheritIfRequired$4;
+	var createNonEnumerableProperty = createNonEnumerableProperty$b;
+	var defineProperty$1 = objectDefineProperty.f;
+	var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+	var isPrototypeOf$1 = objectIsPrototypeOf;
+	var isRegExp$1 = isRegexp;
+	var toString$9 = toString$k;
+	var regExpFlags$1 = regexpFlags$1;
+	var stickyHelpers = regexpStickyHelpers;
+	var redefine$3 = redefine$h.exports;
+	var fails$a = fails$V;
+	var hasOwn$2 = hasOwnProperty_1;
+	var enforceInternalState = internalState.enforce;
+	var setSpecies = setSpecies$5;
+	var wellKnownSymbol$1 = wellKnownSymbol$t;
+	var UNSUPPORTED_DOT_ALL = regexpUnsupportedDotAll;
+	var UNSUPPORTED_NCG = regexpUnsupportedNcg;
 
-	  return this;
-	}
+	var MATCH$1 = wellKnownSymbol$1('match');
+	var NativeRegExp = global$b.RegExp;
+	var RegExpPrototype$1 = NativeRegExp.prototype;
+	var SyntaxError$1 = global$b.SyntaxError;
+	var getFlags = uncurryThis$e(regExpFlags$1);
+	var exec$2 = uncurryThis$e(RegExpPrototype$1.exec);
+	var charAt$1 = uncurryThis$e(''.charAt);
+	var replace$3 = uncurryThis$e(''.replace);
+	var stringIndexOf$1 = uncurryThis$e(''.indexOf);
+	var stringSlice$4 = uncurryThis$e(''.slice);
+	// TODO: Use only propper RegExpIdentifierName
+	var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
+	var re1 = /a/g;
+	var re2 = /a/g;
 
-	function selection_sort (compare) {
-	  if (!compare) compare = ascending;
+	// "new" should create a new object, old webkit bug
+	var CORRECT_NEW = new NativeRegExp(re1) !== re1;
 
-	  function compareNode(a, b) {
-	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
-	  }
+	var MISSED_STICKY = stickyHelpers.MISSED_STICKY;
+	var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
 
-	  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 BASE_FORCED = DESCRIPTORS$4 &&
+	  (!CORRECT_NEW || MISSED_STICKY || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails$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 = charAt$1(string, index);
+	    if (chr === '\\') {
+	      result += chr + charAt$1(string, ++index);
+	      continue;
+	    }
+	    if (!brackets && chr === '.') {
+	      result += '[\\s\\S]';
+	    } else {
+	      if (chr === '[') {
+	        brackets = true;
+	      } else if (chr === ']') {
+	        brackets = false;
+	      } result += chr;
 	    }
+	  } return result;
+	};
 
-	    sortgroup.sort(compareNode);
-	  }
+	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 = charAt$1(string, index);
+	    if (chr === '\\') {
+	      chr = chr + charAt$1(string, ++index);
+	    } else if (chr === ']') {
+	      brackets = false;
+	    } else if (!brackets) switch (true) {
+	      case chr === '[':
+	        brackets = true;
+	        break;
+	      case chr === '(':
+	        if (exec$2(IS_NCG, stringSlice$4(string, index + 1))) {
+	          index += 2;
+	          ncg = true;
+	        }
+	        result += chr;
+	        groupid++;
+	        continue;
+	      case chr === '>' && ncg:
+	        if (groupname === '' || hasOwn$2(names, groupname)) {
+	          throw new SyntaxError$1('Invalid capture group name');
+	        }
+	        names[groupname] = true;
+	        named[named.length] = [groupname, groupid];
+	        ncg = false;
+	        groupname = '';
+	        continue;
+	    }
+	    if (ncg) groupname += chr;
+	    else result += chr;
+	  } return [result, named];
+	};
 
-	  return new Selection(sortgroups, this._parents).order();
-	}
+	// `RegExp` constructor
+	// https://tc39.es/ecma262/#sec-regexp-constructor
+	if (isForced$1('RegExp', BASE_FORCED)) {
+	  var RegExpWrapper = function RegExp(pattern, flags) {
+	    var thisIsRegExp = isPrototypeOf$1(RegExpPrototype$1, this);
+	    var patternIsRegExp = isRegExp$1(pattern);
+	    var flagsAreUndefined = flags === undefined;
+	    var groups = [];
+	    var rawPattern = pattern;
+	    var rawFlags, dotAll, sticky, handled, result, state;
 
-	function ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-	}
+	    if (!thisIsRegExp && patternIsRegExp && flagsAreUndefined && pattern.constructor === RegExpWrapper) {
+	      return pattern;
+	    }
 
-	function selection_call () {
-	  var callback = arguments[0];
-	  arguments[0] = this;
-	  callback.apply(null, arguments);
-	  return this;
-	}
+	    if (patternIsRegExp || isPrototypeOf$1(RegExpPrototype$1, pattern)) {
+	      pattern = pattern.source;
+	      if (flagsAreUndefined) flags = 'flags' in rawPattern ? rawPattern.flags : getFlags(rawPattern);
+	    }
 
-	function selection_nodes () {
-	  return Array.from(this);
-	}
+	    pattern = pattern === undefined ? '' : toString$9(pattern);
+	    flags = flags === undefined ? '' : toString$9(flags);
+	    rawPattern = pattern;
 
-	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;
+	    if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
+	      dotAll = !!flags && stringIndexOf$1(flags, 's') > -1;
+	      if (dotAll) flags = replace$3(flags, /s/g, '');
 	    }
-	  }
 
-	  return null;
-	}
+	    rawFlags = flags;
 
-	function selection_size () {
-	  var size = 0;
+	    if (MISSED_STICKY && 'sticky' in re1) {
+	      sticky = !!flags && stringIndexOf$1(flags, 'y') > -1;
+	      if (sticky && UNSUPPORTED_Y) flags = replace$3(flags, /y/g, '');
+	    }
 
-	  var _iterator = _createForOfIteratorHelper(this),
-	      _step;
+	    if (UNSUPPORTED_NCG) {
+	      handled = handleNCG(pattern);
+	      pattern = handled[0];
+	      groups = handled[1];
+	    }
 
-	  try {
-	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
-	      var node = _step.value;
-	      ++size;
-	    } // eslint-disable-line no-unused-vars
+	    result = inheritIfRequired$1(NativeRegExp(pattern, flags), thisIsRegExp ? this : RegExpPrototype$1, RegExpWrapper);
 
-	  } catch (err) {
-	    _iterator.e(err);
-	  } finally {
-	    _iterator.f();
-	  }
+	    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;
+	    }
 
-	  return size;
-	}
+	    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 selection_empty () {
-	  return !this.node();
-	}
+	    return 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);
-	    }
+	  var proxy = function (key) {
+	    key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
+	      configurable: true,
+	      get: function () { return NativeRegExp[key]; },
+	      set: function (it) { NativeRegExp[key] = it; }
+	    });
+	  };
+
+	  for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
+	    proxy(keys$1[index$1++]);
 	  }
 
-	  return this;
+	  RegExpPrototype$1.constructor = RegExpWrapper;
+	  RegExpWrapper.prototype = RegExpPrototype$1;
+	  redefine$3(global$b, 'RegExp', RegExpWrapper);
 	}
 
-	function attrRemove(name) {
-	  return function () {
-	    this.removeAttribute(name);
-	  };
+	// https://tc39.es/ecma262/#sec-get-regexp-@@species
+	setSpecies('RegExp');
+
+	function define (constructor, factory, prototype) {
+	  constructor.prototype = factory.prototype = prototype;
+	  prototype.constructor = constructor;
 	}
+	function extend$3(parent, definition) {
+	  var prototype = Object.create(parent.prototype);
 
-	function attrRemoveNS(fullname) {
-	  return function () {
-	    this.removeAttributeNS(fullname.space, fullname.local);
-	  };
+	  for (var key in definition) {
+	    prototype[key] = definition[key];
+	  }
+
+	  return prototype;
 	}
 
-	function attrConstant(name, value) {
-	  return function () {
-	    this.setAttribute(name, value);
-	  };
-	}
+	function Color() {}
+	var _darker = 0.7;
 
-	function attrConstantNS(fullname, value) {
-	  return function () {
-	    this.setAttributeNS(fullname.space, fullname.local, value);
-	  };
-	}
+	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
+	});
 
-	function attrFunction(name, value) {
-	  return function () {
-	    var v = value.apply(this, arguments);
-	    if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
-	  };
+	function color_formatHex() {
+	  return this.rgb().formatHex();
 	}
 
-	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 color_formatHsl() {
+	  return hslConvert(this).formatHsl();
 	}
 
-	function selection_attr (name, value) {
-	  var fullname = namespace(name);
-
-	  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 : attrRemove : typeof value === "function" ? fullname.local ? attrFunctionNS : attrFunction : fullname.local ? attrConstantNS : attrConstant)(fullname, value));
+	function color_formatRgb() {
+	  return this.rgb().formatRgb();
 	}
 
-	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
+	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;
 	}
 
-	function styleRemove(name) {
-	  return function () {
-	    this.style.removeProperty(name);
-	  };
+	function rgbn(n) {
+	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
 	}
 
-	function styleConstant(name, value, priority) {
-	  return function () {
-	    this.style.setProperty(name, value, priority);
-	  };
+	function rgba(r, g, b, a) {
+	  if (a <= 0) r = g = b = NaN;
+	  return new Rgb(r, g, b, a);
 	}
 
-	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);
-	  };
+	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 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);
+	function rgb(r, g, b, opacity) {
+	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
 	}
-	function styleValue(node, name) {
-	  return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+	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);
+	  },
+	  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);
+	  },
+	  rgb: function rgb() {
+	    return this;
+	  },
+	  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;
+	  },
+	  hex: rgb_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: rgb_formatHex,
+	  formatRgb: rgb_formatRgb,
+	  toString: rgb_formatRgb
+	}));
 
-	function propertyRemove(name) {
-	  return function () {
-	    delete this[name];
-	  };
+	function rgb_formatHex() {
+	  return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
 	}
 
-	function propertyConstant(name, value) {
-	  return function () {
-	    this[name] = value;
-	  };
+	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 propertyFunction(name, value) {
-	  return function () {
-	    var v = value.apply(this, arguments);
-	    if (v == null) delete this[name];else this[name] = v;
-	  };
+	function hex$1(value) {
+	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
+	  return (value < 16 ? "0" : "") + value.toString(16);
 	}
 
-	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 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 classArray(string) {
-	  return string.trim().split(/^|\s+/);
-	}
+	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;
 
-	function classList(node) {
-	  return node.classList || new ClassList(node);
-	}
+	  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;
+	  }
 
-	function ClassList(node) {
-	  this._node = node;
-	  this._names = classArray(node.getAttribute("class") || "");
+	  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);
 	}
 
-	ClassList.prototype = {
-	  add: function add(name) {
-	    var i = this._names.indexOf(name);
-
-	    if (i < 0) {
-	      this._names.push(name);
+	function Hsl(h, s, l, opacity) {
+	  this.h = +h;
+	  this.s = +s;
+	  this.l = +l;
+	  this.opacity = +opacity;
+	}
 
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
+	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);
 	  },
-	  remove: function remove(name) {
-	    var i = this._names.indexOf(name);
-
-	    if (i >= 0) {
-	      this._names.splice(i, 1);
-
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
 	  },
-	  contains: function contains(name) {
-	    return this._names.indexOf(name) >= 0;
-	  }
-	};
-
-	function classedAdd(node, names) {
-	  var list = classList(node),
-	      i = -1,
-	      n = names.length;
-
-	  while (++i < n) {
-	    list.add(names[i]);
+	  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 + ")");
 	  }
-	}
-
-	function classedRemove(node, names) {
-	  var list = classList(node),
-	      i = -1,
-	      n = names.length;
+	}));
+	/* From FvD 13.37, CSS Color Module Level 3 */
 
-	  while (++i < n) {
-	    list.remove(names[i]);
-	  }
+	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 classedTrue(names) {
+	var constant$1 = (function (x) {
 	  return function () {
-	    classedAdd(this, names);
+	    return x;
 	  };
-	}
+	});
 
-	function classedFalse(names) {
-	  return function () {
-	    classedRemove(this, names);
+	function linear$2(a, d) {
+	  return function (t) {
+	    return a + t * d;
 	  };
 	}
 
-	function classedFunction(names, value) {
-	  return function () {
-	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+	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 gamma(y) {
+	  return (y = +y) === 1 ? nogamma : function (a, b) {
+	    return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
 	  };
 	}
+	function nogamma(a, b) {
+	  var d = b - a;
+	  return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
+	}
 
-	function selection_classed (name, value) {
-	  var names = classArray(name + "");
+	var d3_interpolateRgb = (function rgbGamma(y) {
+	  var color = gamma(y);
 
-	  if (arguments.length < 2) {
-	    var list = classList(this.node()),
-	        i = -1,
-	        n = names.length;
+	  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 + "";
+	    };
+	  }
 
-	    while (++i < n) {
-	      if (!list.contains(names[i])) return false;
+	  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;
 	    }
 
-	    return true;
+	    return c;
+	  };
+	}
+	function isNumberArray(x) {
+	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+	}
+
+	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;
+
+	  for (i = 0; i < na; ++i) {
+	    x[i] = interpolate$1(a[i], b[i]);
 	  }
 
-	  return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
-	}
+	  for (; i < nb; ++i) {
+	    c[i] = b[i];
+	  }
 
-	function textRemove() {
-	  this.textContent = "";
-	}
+	  return function (t) {
+	    for (i = 0; i < na; ++i) {
+	      c[i] = x[i](t);
+	    }
 
-	function textConstant(value) {
-	  return function () {
-	    this.textContent = value;
+	    return c;
 	  };
 	}
 
-	function textFunction(value) {
-	  return function () {
-	    var v = value.apply(this, arguments);
-	    this.textContent = v == null ? "" : v;
+	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 selection_text (value) {
-	  return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction : textConstant)(value)) : this.node().textContent;
-	}
-
-	function htmlRemove() {
-	  this.innerHTML = "";
+	function d3_interpolateNumber (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return a * (1 - t) + b * t;
+	  };
 	}
 
-	function htmlConstant(value) {
-	  return function () {
-	    this.innerHTML = value;
+	function object (a, b) {
+	  var i = {},
+	      c = {},
+	      k;
+	  if (a === null || _typeof(a) !== "object") a = {};
+	  if (b === null || _typeof(b) !== "object") b = {};
+
+	  for (k in b) {
+	    if (k in a) {
+	      i[k] = interpolate$1(a[k], b[k]);
+	    } else {
+	      c[k] = b[k];
+	    }
+	  }
+
+	  return function (t) {
+	    for (k in i) {
+	      c[k] = i[k](t);
+	    }
+
+	    return c;
 	  };
 	}
 
-	function htmlFunction(value) {
+	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+	    reB = new RegExp(reA.source, "g");
+
+	function zero(b) {
 	  return function () {
-	    var v = value.apply(this, arguments);
-	    this.innerHTML = v == null ? "" : v;
+	    return b;
 	  };
 	}
 
-	function selection_html (value) {
-	  return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
+	function one(b) {
+	  return function (t) {
+	    return b(t) + "";
+	  };
 	}
 
-	function raise() {
-	  if (this.nextSibling) this.parentNode.appendChild(this);
-	}
+	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 selection_raise () {
-	  return this.each(raise);
-	}
+	  a = a + "", b = b + ""; // Interpolate pairs of numbers in a & b.
 
-	function lower() {
-	  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
-	}
+	  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 selection_lower () {
-	  return this.each(lower);
-	}
+	    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)
+	      });
+	    }
 
-	function selection_append (name) {
-	  var create = typeof name === "function" ? name : creator(name);
-	  return this.select(function () {
-	    return this.appendChild(create.apply(this, arguments));
-	  });
-	}
+	    bi = reB.lastIndex;
+	  } // Add remains of b.
 
-	function constantNull() {
-	  return null;
-	}
 
-	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);
-	  });
-	}
+	  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.
 
-	function remove() {
-	  var parent = this.parentNode;
-	  if (parent) parent.removeChild(this);
-	}
 
-	function selection_remove () {
-	  return this.each(remove);
-	}
+	  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);
+	    }
 
-	function selection_cloneShallow() {
-	  var clone = this.cloneNode(false),
-	      parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	    return s.join("");
+	  });
 	}
 
-	function selection_cloneDeep() {
-	  var clone = this.cloneNode(true),
-	      parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-	}
+	function interpolate$1 (a, b) {
+	  var t = _typeof(b),
+	      c;
 
-	function selection_clone (deep) {
-	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+	  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 selection_datum (value) {
-	  return arguments.length ? this.property("__data__", value) : this.node().__data__;
+	function interpolateRound (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return Math.round(a * (1 - t) + b * t);
+	  };
 	}
 
-	function contextListener(listener) {
-	  return function (event) {
-	    listener.call(this, event, this.__data__);
+	var degrees = 180 / Math.PI;
+	var identity$3 = {
+	  translateX: 0,
+	  translateY: 0,
+	  rotate: 0,
+	  skewX: 0,
+	  scaleX: 1,
+	  scaleY: 1
+	};
+	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
 	  };
 	}
 
-	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
-	    };
-	  });
+	var svgNode;
+	/* eslint-disable no-undef */
+
+	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);
 	}
 
-	function onRemove(typename) {
-	  return function () {
-	    var on = this.__on;
-	    if (!on) return;
+	function interpolateTransform(parse, pxComma, pxParen, degParen) {
+	  function pop(s) {
+	    return s.length ? s.pop() + " " : "";
+	  }
 
-	    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;
-	      }
+	  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 (++i) on.length = i;else delete this.__on;
-	  };
-	}
+	  function rotate(a, b, s, q) {
+	    if (a !== b) {
+	      if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path
 
-	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;
-	      }
+	      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);
 	    }
-	    this.addEventListener(typename.type, listener, options);
-	    o = {
-	      type: typename.type,
-	      name: typename.name,
-	      value: value,
-	      listener: listener,
-	      options: options
-	    };
-	    if (!on) this.__on = [o];else on.push(o);
-	  };
-	}
-
-	function selection_on (typename, value, options) {
-	  var typenames = parseTypenames$1(typename + ""),
-	      i,
-	      n = typenames.length,
-	      t;
+	  }
 
-	  if (arguments.length < 2) {
-	    var on = this.node().__on;
+	  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);
+	    }
+	  }
 
-	    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;
-	        }
-	      }
+	  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 + ")");
 	    }
-	    return;
 	  }
 
-	  on = value ? onAdd : onRemove;
+	  return function (a, b) {
+	    var s = [],
+	        // string constants and placeholders
+	    q = []; // number interpolators
 
-	  for (i = 0; i < n; ++i) {
-	    this.each(on(typenames[i], value, options));
-	  }
+	    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 this;
+	    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 dispatchEvent$1(node, type, params) {
-	  var window = defaultView(node),
-	      event = window.CustomEvent;
+	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-	  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);
-	  }
+	var epsilon2 = 1e-12;
 
-	  node.dispatchEvent(event);
+	function cosh(x) {
+	  return ((x = Math.exp(x)) + 1 / x) / 2;
 	}
 
-	function dispatchConstant(type, params) {
-	  return function () {
-	    return dispatchEvent$1(this, type, params);
-	  };
+	function sinh(x) {
+	  return ((x = Math.exp(x)) - 1 / x) / 2;
 	}
 
-	function dispatchFunction(type, params) {
-	  return function () {
-	    return dispatchEvent$1(this, type, params.apply(this, arguments));
-	  };
+	function tanh(x) {
+	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
 	}
 
-	function selection_dispatch (type, params) {
-	  return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
-	}
+	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.
 
-	var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
+	    if (d2 < epsilon2) {
+	      S = Math.log(w1 / w0) / rho;
 
-	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;
+	      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;
 
-	        case 1:
-	          if (!(j < m)) {
-	            _context.next = 13;
-	            break;
-	          }
+	      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)];
+	      };
+	    }
 
-	          group = groups[j], i = 0, n = group.length;
+	    i.duration = S * 1000 * rho / Math.SQRT2;
+	    return i;
+	  }
 
-	        case 3:
-	          if (!(i < n)) {
-	            _context.next = 10;
-	            break;
-	          }
+	  zoom.rho = function (_) {
+	    var _1 = Math.max(1e-3, +_),
+	        _2 = _1 * _1,
+	        _4 = _2 * _2;
 
-	          if (!(node = group[i])) {
-	            _context.next = 7;
-	            break;
-	          }
+	    return zoomRho(_1, _2, _4);
+	  };
 
-	          _context.next = 7;
-	          return node;
+	  return zoom;
+	})(Math.SQRT2, 2, 4);
 
-	        case 7:
-	          ++i;
-	          _context.next = 3;
-	          break;
+	function d3_quantize (interpolator, n) {
+	  var samples = new Array(n);
 
-	        case 10:
-	          ++j;
-	          _context.next = 1;
-	          break;
+	  for (var i = 0; i < n; ++i) {
+	    samples[i] = interpolator(i / (n - 1));
+	  }
 
-	        case 13:
-	        case "end":
-	          return _context.stop();
-	      }
-	    }
-	  }, _marked$2, this);
+	  return samples;
 	}
 
-	var root = [null];
-	function Selection(groups, parents) {
-	  this._groups = groups;
-	  this._parents = parents;
-	}
+	var $$t = _export;
+	var bind$4 = functionBind;
 
-	function selection() {
-	  return new Selection([[document.documentElement]], root);
-	}
+	// `Function.prototype.bind` method
+	// https://tc39.es/ecma262/#sec-function.prototype.bind
+	$$t({ target: 'Function', proto: true, forced: Function.bind !== bind$4 }, {
+	  bind: bind$4
+	});
 
-	function selection_selection() {
-	  return this;
+	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);
 	}
 
-	Selection.prototype = selection.prototype = _defineProperty({
-	  constructor: Selection,
-	  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);
+	function clearNow() {
+	  clockNow = 0;
+	}
 
-	function select (selector) {
-	  return typeof selector === "string" ? new Selection([[document.querySelector(selector)]], [document.documentElement]) : new Selection([[selector]], root);
+	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 sourceEvent (event) {
-	  var sourceEvent;
+	    if (!this._next && taskTail !== this) {
+	      if (taskTail) taskTail._next = this;else taskHead = this;
+	      taskTail = this;
+	    }
 
-	  while (sourceEvent = event.sourceEvent) {
-	    event = sourceEvent;
+	    this._call = callback;
+	    this._time = time;
+	    sleep();
+	  },
+	  stop: function stop() {
+	    if (this._call) {
+	      this._call = null;
+	      this._time = Infinity;
+	      sleep();
+	    }
 	  }
-
-	  return event;
+	};
+	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 pointer (event, node) {
-	  event = sourceEvent(event);
-	  if (node === undefined) node = event.currentTarget;
-
-	  if (node) {
-	    var svg = node.ownerSVGElement || node;
+	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
 
-	    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];
-	    }
+	  var t = taskHead,
+	      e;
 
-	    if (node.getBoundingClientRect) {
-	      var rect = node.getBoundingClientRect();
-	      return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
-	    }
+	  while (t) {
+	    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+	    t = t._next;
 	  }
 
-	  return [event.pageX, event.pageY];
+	  --frame;
 	}
 
-	function selectAll (selector) {
-	  return typeof selector === "string" ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) : new Selection([selector == null ? [] : array(selector)], root);
-	}
+	function wake() {
+	  clockNow = (clockLast = clock.now()) + clockSkew;
+	  frame = timeout = 0;
 
-	function nopropagation(event) {
-	  event.stopImmediatePropagation();
+	  try {
+	    timerFlush();
+	  } finally {
+	    frame = 0;
+	    nap();
+	    clockNow = 0;
+	  }
 	}
-	function noevent (event) {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
+
+	function poke() {
+	  var now = clock.now(),
+	      delay = now - clockLast;
+	  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
 	}
 
-	function dragDisable (view) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", noevent, true);
+	function nap() {
+	  var t0,
+	      t1 = taskHead,
+	      t2,
+	      time = Infinity;
 
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", noevent, true);
-	  } else {
-	    root.__noselect = root.style.MozUserSelect;
-	    root.style.MozUserSelect = "none";
+	  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;
+	    }
 	  }
+
+	  taskTail = t0;
+	  sleep(time);
 	}
-	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);
-	  }
+	function sleep(time) {
+	  if (frame) return; // Soonest alarm already set, or will be.
 
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", null);
+	  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 {
-	    root.style.MozUserSelect = root.__noselect;
-	    delete root.__noselect;
+	    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+	    frame = 1, setFrame(wake);
 	  }
 	}
 
-	var constant$1 = (function (x) {
-	  return function () {
-	    return x;
-	  };
-	});
-
-	// `Object.defineProperties` method
-	// https://tc39.github.io/ecma262/#sec-object.defineproperties
-	_export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
-	  defineProperties: objectDefineProperties
-	});
+	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;
+	}
 
-	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
-	    }
+	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$2(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
 	  });
 	}
-
-	DragEvent.prototype.on = function () {
-	  var value = this._.on.apply(this._, arguments);
-
-	  return value === this._ ? this : value;
-	};
-
-	function defaultFilter(event) {
-	  return !event.ctrlKey && !event.button;
+	function init(node, id) {
+	  var schedule = get$1(node, id);
+	  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+	  return schedule;
 	}
-
-	function defaultContainer() {
-	  return this.parentNode;
+	function set(node, id) {
+	  var schedule = get$1(node, id);
+	  if (schedule.state > STARTED) throw new Error("too late; already running");
+	  return schedule;
 	}
-
-	function defaultSubject(event, d) {
-	  return d == null ? {
-	    x: event.x,
-	    y: event.y
-	  } : d;
+	function get$1(node, id) {
+	  var schedule = node.__transition;
+	  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+	  return schedule;
 	}
 
-	function defaultTouchable() {
-	  return navigator.maxTouchPoints || "ontouchstart" in this;
-	}
+	function create$2(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!
 
-	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;
+	  schedules[id] = self;
+	  self.timer = timer(schedule, 0, self.time);
 
-	  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 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.
 
-	  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(event);
-	    mousemoving = false;
-	    mousedownx = event.clientX;
-	    mousedowny = event.clientY;
-	    gesture("start", event);
+	    if (self.delay <= elapsed) start(elapsed - self.delay);
 	  }
 
-	  function mousemoved(event) {
-	    noevent(event);
-
-	    if (!mousemoving) {
-	      var dx = event.clientX - mousedownx,
-	          dy = event.clientY - mousedowny;
-	      mousemoving = dx * dx + dy * dy > clickDistance2;
-	    }
+	  function start(elapsed) {
+	    var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.
 
-	    gestures.mouse("drag", event);
-	  }
+	    if (self.state !== SCHEDULED) return stop();
 
-	  function mouseupped(event) {
-	    select(event.view).on("mousemove.drag mouseup.drag", null);
-	    yesdrag(event.view, mousemoving);
-	    noevent(event);
-	    gestures.mouse("end", event);
-	  }
+	    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 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;
+	      if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
-	        nopropagation(event);
-	        gesture("start", event, touches[i]);
+	      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.
 
-	  function touchmoved(event) {
-	    var touches = event.changedTouches,
-	        n = touches.length,
-	        i,
-	        gesture;
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        noevent(event);
-	        gesture("drag", event, touches[i]);
+	    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.
 
-	  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!
+	    self.state = STARTING;
+	    self.on.call("start", node, node.__data__, self.index, self.group);
+	    if (self.state !== STARTING) return; // interrupted
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        nopropagation(event);
-	        gesture("end", event, touches[i]);
+	    self.state = STARTED; // 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;
 	      }
 	    }
-	  }
 
-	  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;
+	    tween.length = j + 1;
+	  }
 
-	      switch (type) {
-	        case "start":
-	          gestures[identifier] = gesture, n = active++;
-	          break;
+	  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;
 
-	        case "end":
-	          delete gestures[identifier], --active;
-	        // nobreak
+	    while (++i < n) {
+	      tween[i].call(node, t);
+	    } // Dispatch the end event.
 
-	        case "drag":
-	          p = pointer(touch || event, container), n = active;
-	          break;
-	      }
 
-	      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 (self.state === ENDING) {
+	      self.on.call("end", node, node.__data__, self.index, self.group);
+	      stop();
+	    }
 	  }
 
-	  drag.filter = function (_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
-	  };
+	  function stop() {
+	    self.state = ENDED;
+	    self.timer.stop();
+	    delete schedules[id];
 
-	  drag.container = function (_) {
-	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
-	  };
+	    for (var i in schedules) {
+	      return;
+	    } // eslint-disable-line no-unused-vars
 
-	  drag.subject = function (_) {
-	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
-	  };
 
-	  drag.touchable = function (_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
-	  };
+	    delete node.__transition;
+	  }
+	}
 
-	  drag.on = function () {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? drag : value;
-	  };
+	function interrupt (node, name) {
+	  var schedules = node.__transition,
+	      schedule,
+	      active,
+	      empty = true,
+	      i;
+	  if (!schedules) return;
+	  name = name == null ? null : name + "";
 
-	  drag.clickDistance = function (_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
-	  };
+	  for (i in schedules) {
+	    if ((schedule = schedules[i]).name !== name) {
+	      empty = false;
+	      continue;
+	    }
 
-	  return drag;
+	    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;
 	}
 
-	var defineProperty$9 = objectDefineProperty.f;
-	var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+	function selection_interrupt (name) {
+	  return this.each(function () {
+	    interrupt(this, name);
+	  });
+	}
 
+	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.
 
+	    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;
+	        }
+	      }
+	    }
 
+	    schedule.tween = tween1;
+	  };
+	}
 
-	var setInternalState$8 = internalState.set;
+	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();
 
+	      for (var t = {
+	        name: name,
+	        value: value
+	      }, i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1[i] = t;
+	          break;
+	        }
+	      }
 
-	var MATCH$1 = wellKnownSymbol('match');
-	var NativeRegExp = global_1.RegExp;
-	var RegExpPrototype$1 = NativeRegExp.prototype;
-	var re1 = /a/g;
-	var re2 = /a/g;
+	      if (i === n) tween1.push(t);
+	    }
 
-	// "new" should create a new object, old webkit bug
-	var CORRECT_NEW = new NativeRegExp(re1) !== re1;
+	    schedule.tween = tween1;
+	  };
+	}
 
-	var UNSUPPORTED_Y$2 = regexpStickyHelpers.UNSUPPORTED_Y;
+	function transition_tween (name, value) {
+	  var id = this._id;
+	  name += "";
 
-	var FORCED$b = descriptors && isForced_1('RegExp', (!CORRECT_NEW || UNSUPPORTED_Y$2 || fails(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';
-	})));
+	  if (arguments.length < 2) {
+	    var tween = get$1(this.node(), id).tween;
 
-	// `RegExp` constructor
-	// https://tc39.github.io/ecma262/#sec-regexp-constructor
-	if (FORCED$b) {
-	  var RegExpWrapper = function RegExp(pattern, flags) {
-	    var thisIsRegExp = this instanceof RegExpWrapper;
-	    var patternIsRegExp = isRegexp(pattern);
-	    var flagsAreUndefined = flags === undefined;
-	    var sticky;
-
-	    if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
-	      return pattern;
-	    }
-
-	    if (CORRECT_NEW) {
-	      if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;
-	    } else if (pattern instanceof RegExpWrapper) {
-	      if (flagsAreUndefined) flags = regexpFlags.call(pattern);
-	      pattern = pattern.source;
-	    }
-
-	    if (UNSUPPORTED_Y$2) {
-	      sticky = !!flags && flags.indexOf('y') > -1;
-	      if (sticky) flags = flags.replace(/y/g, '');
+	    for (var i = 0, n = tween.length, t; i < n; ++i) {
+	      if ((t = tween[i]).name === name) {
+	        return t.value;
+	      }
 	    }
 
-	    var result = inheritIfRequired(
-	      CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
-	      thisIsRegExp ? this : RegExpPrototype$1,
-	      RegExpWrapper
-	    );
-
-	    if (UNSUPPORTED_Y$2 && sticky) setInternalState$8(result, { sticky: sticky });
+	    return null;
+	  }
 
-	    return result;
-	  };
-	  var proxy = function (key) {
-	    key in RegExpWrapper || defineProperty$9(RegExpWrapper, key, {
-	      configurable: true,
-	      get: function () { return NativeRegExp[key]; },
-	      set: function (it) { NativeRegExp[key] = it; }
-	    });
+	  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];
 	  };
-	  var keys$2 = getOwnPropertyNames$1(NativeRegExp);
-	  var index = 0;
-	  while (keys$2.length > index) proxy(keys$2[index++]);
-	  RegExpPrototype$1.constructor = RegExpWrapper;
-	  RegExpWrapper.prototype = RegExpPrototype$1;
-	  redefine(global_1, 'RegExp', RegExpWrapper);
 	}
 
-	// https://tc39.github.io/ecma262/#sec-get-regexp-@@species
-	setSpecies('RegExp');
-
-	function define (constructor, factory, prototype) {
-	  constructor.prototype = factory.prototype = prototype;
-	  prototype.constructor = constructor;
+	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 extend(parent, definition) {
-	  var prototype = Object.create(parent.prototype);
-
-	  for (var key in definition) {
-	    prototype[key] = definition[key];
-	  }
 
-	  return prototype;
+	function attrRemove(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
 	}
 
-	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
-	});
-
-	function color_formatHex() {
-	  return this.rgb().formatHex();
+	function attrRemoveNS(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
 	}
 
-	function color_formatHsl() {
-	  return hslConvert(this).formatHsl();
+	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);
+	  };
 	}
 
-	function color_formatRgb() {
-	  return this.rgb().formatRgb();
+	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);
+	  };
 	}
 
-	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;
+	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));
+	  };
 	}
 
-	function rgbn(n) {
-	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+	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));
+	  };
 	}
 
-	function rgba(r, g, b, a) {
-	  if (a <= 0) r = g = b = NaN;
-	  return new Rgb(r, g, b, a);
+	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));
 	}
 
-	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;
+	function attrInterpolate(name, i) {
+	  return function (t) {
+	    this.setAttribute(name, i.call(this, t));
+	  };
 	}
-	define(Rgb, rgb, extend(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);
-	  },
-	  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);
-	  },
-	  rgb: function rgb() {
-	    return this;
-	  },
-	  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;
-	  },
-	  hex: rgb_formatHex,
-	  // Deprecated! Use color.formatHex.
-	  formatHex: rgb_formatHex,
-	  formatRgb: rgb_formatRgb,
-	  toString: rgb_formatRgb
-	}));
 
-	function rgb_formatHex() {
-	  return "#" + hex$2(this.r) + hex$2(this.g) + hex$2(this.b);
+	function attrInterpolateNS(fullname, i) {
+	  return function (t) {
+	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+	  };
 	}
 
-	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 attrTweenNS(fullname, value) {
+	  var t0, i0;
 
-	function hex$2(value) {
-	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
-	  return (value < 16 ? "0" : "") + value.toString(16);
-	}
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+	    return t0;
+	  }
 
-	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);
+	  tween._value = value;
+	  return tween;
 	}
 
-	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;
+	function attrTween(name, value) {
+	  var t0, i0;
 
-	  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;
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+	    return t0;
 	  }
 
-	  return new Hsl(h, s, l, o.opacity);
+	  tween._value = value;
+	  return tween;
 	}
-	function hsl(h, s, l, opacity) {
-	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+
+	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));
 	}
 
-	function Hsl(h, s, l, opacity) {
-	  this.h = +h;
-	  this.s = +s;
-	  this.l = +l;
-	  this.opacity = +opacity;
+	function delayFunction(id, value) {
+	  return function () {
+	    init(this, id).delay = +value.apply(this, arguments);
+	  };
 	}
 
-	define(Hsl, hsl, extend(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 delayConstant(id, value) {
+	  return value = +value, function () {
+	    init(this, id).delay = value;
+	  };
+	}
 
-	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 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;
 	}
 
-	var constant$2 = (function (x) {
+	function durationFunction(id, value) {
 	  return function () {
-	    return x;
+	    set(this, id).duration = +value.apply(this, arguments);
 	  };
-	});
+	}
 
-	function linear(a, d) {
-	  return function (t) {
-	    return a + t * d;
+	function durationConstant(id, value) {
+	  return value = +value, function () {
+	    set(this, id).duration = value;
 	  };
 	}
 
-	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 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;
+	}
+
+	function easeConstant(id, value) {
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    set(this, id).ease = value;
 	  };
 	}
-	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 transition_ease (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
+	}
+
+	function easeVarying(id, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (typeof v !== "function") throw new Error();
+	    set(this, id).ease = v;
 	  };
 	}
-	function nogamma(a, b) {
-	  var d = b - a;
-	  return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+
+	function transition_easeVarying (value) {
+	  if (typeof value !== "function") throw new Error();
+	  return this.each(easeVarying(this._id, value));
 	}
 
-	var d3_interpolateRgb = (function rgbGamma(y) {
-	  var color = gamma(y);
+	function transition_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	  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 + "";
-	    };
+	  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);
+	      }
+	    }
 	  }
 
-	  rgb$1.gamma = rgbGamma;
-	  return rgb$1;
-	})(1);
+	  return new Transition(subgroups, this._parents, this._name, this._id);
+	}
 
-	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 isNumberArray(x) {
-	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
-	}
-
-	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;
+	function transition_merge (transition) {
+	  if (transition._id !== this._id) throw new Error();
 
-	  for (i = 0; i < na; ++i) {
-	    x[i] = interpolate(a[i], b[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;
+	      }
+	    }
 	  }
 
-	  for (; i < nb; ++i) {
-	    c[i] = b[i];
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
 	  }
 
-	  return function (t) {
-	    for (i = 0; i < na; ++i) {
-	      c[i] = x[i](t);
-	    }
-
-	    return c;
-	  };
+	  return new Transition(merges, this._parents, this._name, this._id);
 	}
 
-	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 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";
+	  });
 	}
 
-	function d3_interpolateNumber (a, b) {
-	  return a = +a, b = +b, function (t) {
-	    return a * (1 - t) + b * t;
+	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.
+
+	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+	    schedule.on = on1;
 	  };
 	}
 
-	function object (a, b) {
-	  var i = {},
-	      c = {},
-	      k;
-	  if (a === null || _typeof(a) !== "object") a = {};
-	  if (b === null || _typeof(b) !== "object") b = {};
+	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));
+	}
 
-	  for (k in b) {
-	    if (k in a) {
-	      i[k] = interpolate(a[k], b[k]);
-	    } else {
-	      c[k] = b[k];
-	    }
-	  }
+	function removeFunction(id) {
+	  return function () {
+	    var parent = this.parentNode;
 
-	  return function (t) {
-	    for (k in i) {
-	      c[k] = i[k](t);
+	    for (var i in this.__transition) {
+	      if (+i !== id) return;
 	    }
 
-	    return c;
-	  };
-	}
-
-	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
-	    reB = new RegExp(reA.source, "g");
-
-	function zero(b) {
-	  return function () {
-	    return b;
+	    if (parent) parent.removeChild(this);
 	  };
 	}
 
-	function one(b) {
-	  return function (t) {
-	    return b(t) + "";
-	  };
+	function transition_remove () {
+	  return this.on("end.remove", removeFunction(this._id));
 	}
 
-	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.
-
-	  a = a + "", b = b + ""; // 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;
-	    }
+	function transition_select (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selector(select);
 
-	    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)
-	      });
+	  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));
+	      }
 	    }
+	  }
 
-	    bi = reB.lastIndex;
-	  } // Add remains of b.
-
+	  return new Transition(subgroups, this._parents, name, id);
+	}
 
-	  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.
+	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);
+	          }
+	        }
 
-	  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);
+	        subgroups.push(children);
+	        parents.push(node);
+	      }
 	    }
+	  }
 
-	    return s.join("");
-	  });
+	  return new Transition(subgroups, parents, name, id);
 	}
 
-	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);
+	var Selection = selection.prototype.constructor;
+	function transition_selection () {
+	  return new Selection(this._groups, this._parents);
 	}
 
-	function interpolateRound (a, b) {
-	  return a = +a, b = +b, function (t) {
-	    return Math.round(a * (1 - t) + b * t);
+	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);
 	  };
 	}
 
-	var degrees$1 = 180 / Math.PI;
-	var identity$1 = {
-	  translateX: 0,
-	  translateY: 0,
-	  rotate: 0,
-	  skewX: 0,
-	  scaleX: 1,
-	  scaleY: 1
-	};
-	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 styleRemove(name) {
+	  return function () {
+	    this.style.removeProperty(name);
 	  };
 	}
 
-	var svgNode;
-	/* eslint-disable no-undef */
-
-	function parseCss(value) {
-	  var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
-	  return m.isIdentity ? identity$1 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+	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 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 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 interpolateTransform(parse, pxComma, pxParen, degParen) {
-	  function pop(s) {
-	    return s.length ? s.pop() + " " : "";
-	  }
+	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 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 (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+	    schedule.on = on1;
+	  };
+	}
 
-	  function rotate(a, b, s, q) {
-	    if (a !== b) {
-	      if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path
+	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);
+	}
 
-	      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);
-	    }
-	  }
+	function styleInterpolate(name, i, priority) {
+	  return function (t) {
+	    this.style.setProperty(name, i.call(this, t), priority);
+	  };
+	}
 
-	  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 styleTween(name, value, priority) {
+	  var t, i0;
 
-	  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 tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+	    return t;
 	  }
 
-	  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;
+	  tween._value = value;
+	  return tween;
+	}
 
-	      while (++i < n) {
-	        s[(o = q[i]).i] = o.x(t);
-	      }
+	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 s.join("");
-	    };
+	function textConstant(value) {
+	  return function () {
+	    this.textContent = value;
 	  };
 	}
 
-	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
-	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
-
-	var epsilon2$1 = 1e-12;
+	function textFunction(value) {
+	  return function () {
+	    var value1 = value(this);
+	    this.textContent = value1 == null ? "" : value1;
+	  };
+	}
 
-	function cosh(x) {
-	  return ((x = Math.exp(x)) + 1 / x) / 2;
+	function transition_text (value) {
+	  return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
 	}
 
-	function sinh(x) {
-	  return ((x = Math.exp(x)) - 1 / x) / 2;
+	function textInterpolate(i) {
+	  return function (t) {
+	    this.textContent = i.call(this, t);
+	  };
 	}
 
-	function tanh(x) {
-	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+	function textTween(value) {
+	  var t0, i0;
+
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+	    return t0;
+	  }
+
+	  tween._value = value;
+	  return tween;
 	}
 
-	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.
+	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));
+	}
 
-	    if (d2 < epsilon2$1) {
-	      S = Math.log(w1 / w0) / rho;
+	function transition_transition () {
+	  var name = this._name,
+	      id0 = this._id,
+	      id1 = newId();
 
-	      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)];
-	        };
+	  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
+	        });
 	      }
-
-	    i.duration = S * 1000 * rho / Math.SQRT2;
-	    return i;
+	    }
 	  }
 
-	  zoom.rho = function (_) {
-	    var _1 = Math.max(1e-3, +_),
-	        _2 = _1 * _1,
-	        _4 = _2 * _2;
+	  return new Transition(groups, this._parents, name, id1);
+	}
 
-	    return zoomRho(_1, _2, _4);
-	  };
+	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.
 
-	  return zoom;
-	})(Math.SQRT2, 2, 4);
+	      if (on !== on0) {
+	        on1 = (on0 = on).copy();
 
-	function d3_quantize (interpolator, n) {
-	  var samples = new Array(n);
+	        on1._.cancel.push(cancel);
 
-	  for (var i = 0; i < n; ++i) {
-	    samples[i] = interpolator(i / (n - 1));
-	  }
+	        on1._.interrupt.push(cancel);
 
-	  return samples;
-	}
+	        on1._.end.push(end);
+	      }
 
-	// `Function.prototype.bind` method
-	// https://tc39.github.io/ecma262/#sec-function.prototype.bind
-	_export({ target: 'Function', proto: true }, {
-	  bind: functionBind
-	});
+	      schedule.on = on1;
+	    }); // The selection was empty, resolve end immediately
 
-	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() {
-	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+	    if (size === 0) resolve();
+	  });
 	}
 
-	function clearNow() {
-	  clockNow = 0;
+	var id = 0;
+	function Transition(groups, parents, name, id) {
+	  this._groups = groups;
+	  this._parents = parents;
+	  this._name = name;
+	  this._id = id;
 	}
-
-	function Timer() {
-	  this._call = this._time = this._next = null;
+	function newId() {
+	  return ++id;
 	}
-	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() : +time) + (delay == null ? 0 : +delay);
-
-	    if (!this._next && taskTail !== this) {
-	      if (taskTail) taskTail._next = this;else taskHead = this;
-	      taskTail = this;
-	    }
+	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]);
 
-	    this._call = callback;
-	    this._time = time;
-	    sleep();
-	  },
-	  stop: function stop() {
-	    if (this._call) {
-	      this._call = null;
-	      this._time = Infinity;
-	      sleep();
-	    }
-	  }
+	var linear$1 = function linear(t) {
+	  return +t;
 	};
-	function timer(callback, delay, time) {
-	  var t = new Timer();
-	  t.restart(callback, delay, time);
-	  return t;
+
+	function cubicInOut(t) {
+	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
 	}
-	function timerFlush() {
-	  now(); // Get the current time, if not already set.
 
-	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+	var defaultTiming = {
+	  time: null,
+	  // Set on use.
+	  delay: 0,
+	  duration: 250,
+	  ease: cubicInOut
+	};
 
-	  var t = taskHead,
-	      e;
+	function inherit(node, id) {
+	  var timing;
 
-	  while (t) {
-	    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
-	    t = t._next;
+	  while (!(timing = node.__transition) || !(timing = timing[id])) {
+	    if (!(node = node.parentNode)) {
+	      throw new Error("transition ".concat(id, " not found"));
+	    }
 	  }
 
-	  --frame;
+	  return timing;
 	}
 
-	function wake() {
-	  clockNow = (clockLast = clock.now()) + clockSkew;
-	  frame = timeout = 0;
+	function selection_transition (name) {
+	  var id, timing;
 
-	  try {
-	    timerFlush();
-	  } finally {
-	    frame = 0;
-	    nap();
-	    clockNow = 0;
+	  if (name instanceof Transition) {
+	    id = name._id, name = name._name;
+	  } else {
+	    id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
 	  }
-	}
-
-	function poke() {
-	  var now = clock.now(),
-	      delay = now - clockLast;
-	  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
-	}
 
-	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;
+	  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));
+	      }
 	    }
 	  }
 
-	  taskTail = t0;
-	  sleep(time);
+	  return new Transition(groups, this._parents, name, id);
 	}
 
-	function sleep(time) {
-	  if (frame) return; // Soonest alarm already set, or will be.
+	selection.prototype.interrupt = selection_interrupt;
+	selection.prototype.transition = selection_transition;
 
-	  if (timeout) timeout = clearTimeout(timeout);
-	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+	var constant = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	  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 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 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;
+	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);
 
-	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;
-	function schedule (node, name, id, index, group, timing) {
-	  var schedules = node.__transition;
-	  if (!schedules) node.__transition = {};else if (id in schedules) return;
-	  create(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$4(node, id);
-	  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
-	  return schedule;
-	}
-	function set$4(node, id) {
-	  var schedule = get$4(node, id);
-	  if (schedule.state > STARTED) throw new Error("too late; already running");
-	  return schedule;
+	function nopropagation(event) {
+	  event.stopImmediatePropagation();
 	}
-	function get$4(node, id) {
-	  var schedule = node.__transition;
-	  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
-	  return schedule;
+	function noevent (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
 	}
 
-	function create(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!
+	// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
 
-	  schedules[id] = self;
-	  self.timer = timer(schedule, 0, self.time);
+	function defaultFilter$1(event) {
+	  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+	}
 
-	  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.
+	function defaultExtent$1() {
+	  var e = this;
 
-	    if (self.delay <= elapsed) start(elapsed - self.delay);
-	  }
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	  function start(elapsed) {
-	    var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.
+	    if (e.hasAttribute("viewBox")) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
-	    if (self.state !== SCHEDULED) return stop();
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
-	    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!
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	      if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.
+	function defaultTransform() {
+	  return this.__zoom || identity$2;
+	}
 
-	      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.
+	function defaultWheelDelta$1(event) {
+	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+	}
 
+	function defaultTouchable() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
+	}
 
-	    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.
+	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));
+	}
 
-	    self.state = STARTING;
-	    self.on.call("start", node, node.__data__, self.index, self.group);
-	    if (self.state !== STARTING) return; // interrupted
+	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;
 
-	    self.state = STARTED; // Initialize the tween, deleting null tween.
+	  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)");
+	  }
 
-	    tween = new Array(n = self.tween.length);
+	  zoom.transform = function (collection, transform, point, event) {
+	    var selection = collection.selection ? collection.selection() : collection;
+	    selection.property("__zoom", defaultTransform);
 
-	    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;
-	      }
+	    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();
+	      });
 	    }
+	  };
 
-	    tween.length = j + 1;
-	  }
+	  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);
+	  };
 
-	  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;
+	  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);
+	  };
 
-	    while (++i < n) {
-	      tween[i].call(node, t);
-	    } // Dispatch the end event.
+	  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);
+	  };
 
+	  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);
+	  };
 
-	    if (self.state === ENDING) {
-	      self.on.call("end", node, node.__data__, self.index, self.group);
-	      stop();
-	    }
+	  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 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;
+	  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 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;
-	    }
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	    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];
+	  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);
+	      };
+	    });
 	  }
 
-	  if (empty) delete node.__transition;
-	}
+	  function gesture(that, args, clean) {
+	    return !clean && that.__zooming || new Gesture(that, args);
+	  }
 
-	function selection_interrupt (name) {
-	  return this.each(function () {
-	    interrupt(this, name);
-	  });
-	}
+	  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;
+	  }
 
-	function tweenRemove(id, name) {
-	  var tween0, tween1;
-	  return function () {
-	    var schedule = set$4(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.
+	  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");
+	      }
 
-	    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;
-	        }
+	      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");
 	      }
-	    }
 
-	    schedule.tween = tween1;
+	      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 tweenFunction(id, name, value) {
-	  var tween0, tween1;
-	  if (typeof value !== "function") throw new Error();
-	  return function () {
-	    var schedule = set$4(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.
+	  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 (tween !== tween0) {
-	      tween1 = (tween0 = tween).slice();
+	    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.
 
-	      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 (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 (i === n) tween1.push(t);
+	      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();
 	    }
 
-	    schedule.tween = tween1;
-	  };
-	}
+	    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 transition_tween (name, value) {
-	  var id = this._id;
-	  name += "";
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end();
+	    }
+	  }
 
-	  if (arguments.length < 2) {
-	    var tween = get$4(this.node(), id).tween;
+	  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];
+	    }
 
-	    for (var i = 0, n = tween.length, t; i < n; ++i) {
-	      if ((t = tween[i]).name === name) {
-	        return t.value;
+	    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();
+
+	    function mousemoved(event) {
+	      noevent(event);
+
+	      if (!g.moved) {
+	        var dx = event.clientX - x0,
+	            dy = event.clientY - y0;
+	        g.moved = dx * dx + dy * dy > clickDistance2;
 	      }
+
+	      g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
 	    }
 
-	    return null;
+	    function mouseupped(event) {
+	      v.on("mousemove.zoom mouseup.zoom", null);
+	      yesdrag(event.view, g.moved);
+	      noevent(event);
+	      g.event(event).end();
+	    }
 	  }
 
-	  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$4(this, id);
-	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
-	  });
-	  return function (node) {
-	    return get$4(node, id).value[name];
-	  };
-	}
+	  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 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);
-	}
+	    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);
+	  }
 
-	function attrRemove$1(name) {
-	  return function () {
-	    this.removeAttribute(name);
-	  };
-	}
+	  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];
+	    }
 
-	function attrRemoveNS$1(fullname) {
-	  return function () {
-	    this.removeAttributeNS(fullname.space, fullname.local);
-	  };
-	}
+	    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);
 
-	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);
-	  };
-	}
+	    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;
+	    }
 
-	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);
-	  };
-	}
+	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
-	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));
-	  };
-	}
+	    if (started) {
+	      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
+	        touchstarting = null;
+	      }, touchDelay);
+	      interrupt(this);
+	      g.start();
+	    }
+	  }
 
-	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));
-	  };
-	}
+	  function touchmoved(event) {
+	    if (!this.__zooming) return;
 
-	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));
-	}
+	    for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
+	      args[_key5 - 1] = arguments[_key5];
+	    }
 
-	function attrInterpolate(name, i) {
-	  return function (t) {
-	    this.setAttribute(name, i.call(this, t));
-	  };
-	}
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t,
+	        p,
+	        l;
+	    noevent(event);
 
-	function attrInterpolateNS(fullname, i) {
-	  return function (t) {
-	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
-	  };
-	}
+	    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;
+	    }
 
-	function attrTweenNS(fullname, value) {
-	  var t0, i0;
+	    t = g.that.__zoom;
 
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
-	    return t0;
+	    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));
 	  }
 
-	  tween._value = value;
-	  return tween;
-	}
+	  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];
+	    }
 
-	function attrTween(name, value) {
-	  var t0, i0;
+	    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 tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
-	    return t0;
+	    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) {
+	        t = pointer(t, this);
+
+	        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);
+	        }
+	      }
+	    }
 	  }
 
-	  tween._value = value;
-	  return tween;
-	}
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
+	  };
 
-	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));
-	}
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
+	  };
 
-	function delayFunction(id, value) {
-	  return function () {
-	    init(this, id).delay = +value.apply(this, arguments);
+	  zoom.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
 	  };
-	}
 
-	function delayConstant(id, value) {
-	  return value = +value, function () {
-	    init(this, id).delay = value;
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
 	  };
-	}
 
-	function transition_delay (value) {
-	  var id = this._id;
-	  return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$4(this.node(), id).delay;
-	}
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
-	function durationFunction(id, value) {
-	  return function () {
-	    set$4(this, id).duration = +value.apply(this, arguments);
+	  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 durationConstant(id, value) {
-	  return value = +value, function () {
-	    set$4(this, id).duration = value;
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
 	  };
-	}
 
-	function transition_duration (value) {
-	  var id = this._id;
-	  return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$4(this.node(), id).duration;
-	}
+	  zoom.duration = function (_) {
+	    return arguments.length ? (duration = +_, zoom) : duration;
+	  };
 
-	function easeConstant(id, value) {
-	  if (typeof value !== "function") throw new Error();
-	  return function () {
-	    set$4(this, id).ease = value;
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
 	  };
-	}
 
-	function transition_ease (value) {
-	  var id = this._id;
-	  return arguments.length ? this.each(easeConstant(id, value)) : get$4(this.node(), id).ease;
-	}
+	  zoom.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? zoom : value;
+	  };
 
-	function easeVarying(id, value) {
-	  return function () {
-	    var v = value.apply(this, arguments);
-	    if (typeof v !== "function") throw new Error();
-	    set$4(this, id).ease = v;
+	  zoom.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
 	  };
-	}
 
-	function transition_easeVarying (value) {
-	  if (typeof value !== "function") throw new Error();
-	  return this.each(easeVarying(this._id, value));
+	  zoom.tapDistance = function (_) {
+	    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+	  };
+
+	  return zoom;
 	}
 
-	function transition_filter (match) {
-	  if (typeof match !== "function") match = matcher(match);
+	/*
+	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
+	    * Antimeridian clipping
+	    * Spherical rotation
+	    * Resampling
+	*/
 
-	  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);
-	      }
-	    }
-	  }
+	function geoRawMercator() {
+	  var project = mercatorRaw;
+	  var k = 512 / Math.PI; // scale
 
-	  return new Transition(subgroups, this._parents, this._name, this._id);
-	}
+	  var x = 0;
+	  var y = 0; // translate
 
-	function transition_merge (transition) {
-	  if (transition._id !== this._id) throw new Error();
+	  var clipExtent = [[0, 0], [0, 0]];
 
-	  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 projection(point) {
+	    point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
+	    return [point[0] * k + x, y - point[1] * k];
 	  }
 
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
-	  }
+	  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];
+	  };
 
-	  return new Transition(merges, this._parents, this._name, this._id);
-	}
+	  projection.scale = function (_) {
+	    if (!arguments.length) return k;
+	    k = +_;
+	    return projection;
+	  };
 
-	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";
-	  });
-	}
+	  projection.translate = function (_) {
+	    if (!arguments.length) return [x, y];
+	    x = +_[0];
+	    y = +_[1];
+	    return projection;
+	  };
 
-	function onFunction(id, name, listener) {
-	  var on0,
-	      on1,
-	      sit = start(name) ? init : set$4;
-	  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.
+	  projection.clipExtent = function (_) {
+	    if (!arguments.length) return clipExtent;
+	    clipExtent = _;
+	    return projection;
+	  };
 
-	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
-	    schedule.on = on1;
+	  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 transition_on (name, listener) {
-	  var id = this._id;
-	  return arguments.length < 2 ? get$4(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
+	  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 removeFunction(id) {
-	  return function () {
-	    var parent = this.parentNode;
-
-	    for (var i in this.__transition) {
-	      if (+i !== id) return;
-	    }
+	function geoOrthoNormalizedDotProduct(a, b, origin) {
+	  if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
+	    return 1; // coincident points, treat as straight and try to remove
+	  }
 
-	    if (parent) parent.removeChild(this);
-	  };
+	  return geoVecNormalizedDot(a, b, origin);
 	}
 
-	function transition_remove () {
-	  return this.on("end.remove", removeFunction(this._id));
+	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 transition_select (select) {
-	  var name = this._name,
-	      id = this._id;
-	  if (typeof select !== "function") select = selector(select);
-
-	  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$4(node, id));
-	      }
-	    }
-	  }
-
-	  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);
+	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);
 
-	  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$4(node, id), k = 0, l = children.length; k < l; ++k) {
-	          if (child = children[k]) {
-	            schedule(child, name, id, k, children, inherit);
-	          }
-	        }
+	  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
 
-	        subgroups.push(children);
-	        parents.push(node);
-	      }
-	    }
+	    score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
 	  }
 
-	  return new Transition(subgroups, parents, name, id);
-	}
-
-	var Selection$1 = selection.prototype.constructor;
-	function transition_selection () {
-	  return new Selection$1(this._groups, this._parents);
-	}
-
-	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$1(name) {
-	  return function () {
-	    this.style.removeProperty(name);
-	  };
-	}
-
-	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);
-	  };
-	}
-
-	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));
-	  };
-	}
-
-	function styleMaybeRemove(id, name) {
-	  var on0,
-	      on1,
-	      listener0,
-	      key = "style." + name,
-	      event = "end." + key,
-	      remove;
-	  return function () {
-	    var schedule = set$4(this, id),
-	        on = schedule.on,
-	        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(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.
-
-	    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$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);
-	}
-
-	function styleInterpolate(name, i, priority) {
-	  return function (t) {
-	    this.style.setProperty(name, i.call(this, t), priority);
-	  };
-	}
+	  return score;
+	} // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
 
-	function styleTween(name, value, priority) {
-	  var t, i0;
+	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
+	  var max = -Infinity;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
 
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
-	    return t;
+	  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;
 	  }
 
-	  tween._value = value;
-	  return tween;
-	}
+	  if (max === -Infinity) return null;
+	  return max;
+	} // similar to geoOrthoCalcScore, but returns quickly if there is something to do
 
-	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 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);
 
-	function textConstant$1(value) {
-	  return function () {
-	    this.textContent = value;
-	  };
-	}
+	  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
 
-	function textFunction$1(value) {
-	  return function () {
-	    var value1 = value(this);
-	    this.textContent = value1 == null ? "" : value1;
-	  };
-	}
+	    if (Math.abs(dotp) > 0) return 1; // something to do
 
-	function transition_text (value) {
-	  return this.tween("text", typeof value === "function" ? textFunction$1(tweenValue(this, "text", value)) : textConstant$1(value == null ? "" : value + ""));
-	}
+	    score = 0; // already square
+	  }
 
-	function textInterpolate(i) {
-	  return function (t) {
-	    this.textContent = i.call(this, t);
-	  };
+	  return score;
 	}
 
-	function textTween(value) {
-	  var t0, i0;
-
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
-	    return t0;
-	  }
+	var call$2 = functionCall;
+	var fixRegExpWellKnownSymbolLogic$1 = fixRegexpWellKnownSymbolLogic;
+	var anObject$1 = anObject$n;
+	var toLength$3 = toLength$c;
+	var toString$8 = toString$k;
+	var requireObjectCoercible$7 = requireObjectCoercible$e;
+	var getMethod$1 = getMethod$7;
+	var advanceStringIndex = advanceStringIndex$3;
+	var regExpExec$1 = regexpExecAbstract;
 
-	  tween._value = value;
-	  return tween;
-	}
+	// @@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 : getMethod$1(regexp, MATCH);
+	      return matcher ? call$2(matcher, regexp, O) : new RegExp(regexp)[MATCH](toString$8(O));
+	    },
+	    // `RegExp.prototype[@@match]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
+	    function (string) {
+	      var rx = anObject$1(this);
+	      var S = toString$8(string);
+	      var res = maybeCallNative(nativeMatch, rx, S);
 
-	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));
-	}
+	      if (res.done) return res.value;
 
-	function transition_transition () {
-	  var name = this._name,
-	      id0 = this._id,
-	      id1 = newId();
+	      if (!rx.global) return regExpExec$1(rx, S);
 
-	  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$4(node, id0);
-	        schedule(node, name, id1, i, group, {
-	          time: inherit.time + inherit.delay + inherit.duration,
-	          delay: 0,
-	          duration: inherit.duration,
-	          ease: inherit.ease
-	        });
+	      var fullUnicode = rx.unicode;
+	      rx.lastIndex = 0;
+	      var A = [];
+	      var n = 0;
+	      var result;
+	      while ((result = regExpExec$1(rx, S)) !== null) {
+	        var matchStr = toString$8(result[0]);
+	        A[n] = matchStr;
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength$3(rx.lastIndex), fullUnicode);
+	        n++;
 	      }
+	      return n === 0 ? null : A;
 	    }
-	  }
+	  ];
+	});
 
-	  return new Transition(groups, this._parents, name, id1);
-	}
+	var $$s = _export;
+	var FREEZING = freezing;
+	var fails$9 = fails$V;
+	var isObject$4 = isObject$s;
+	var onFreeze = internalMetadata.exports.onFreeze;
 
-	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$4(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.
+	// eslint-disable-next-line es/no-object-freeze -- safe
+	var $freeze = Object.freeze;
+	var FAILS_ON_PRIMITIVES = fails$9(function () { $freeze(1); });
 
-	      if (on !== on0) {
-	        on1 = (on0 = on).copy();
+	// `Object.freeze` method
+	// https://tc39.es/ecma262/#sec-object.freeze
+	$$s({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {
+	  freeze: function freeze(it) {
+	    return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
+	  }
+	});
 
-	        on1._.cancel.push(cancel);
+	// 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;
 
-	        on1._.interrupt.push(cancel);
+	  while (i--) {
+	    if (a[i] !== b[i]) return false;
+	  }
 
-	        on1._.end.push(end);
-	      }
+	  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]
 
-	      schedule.on = on1;
-	    }); // The selection was empty, resolve end immediately
+	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]
 
-	    if (size === 0) resolve();
+	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]
 
-	var id$1 = 0;
-	function Transition(groups, parents, name, id) {
-	  this._groups = groups;
-	  this._parents = parents;
-	  this._name = name;
-	  this._id = id;
-	}
-	function transition(name) {
-	  return selection().transition(name);
-	}
-	function newId() {
-	  return ++id$1;
-	}
-	var selection_prototype = selection.prototype;
-	Transition.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]);
+	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]
 
-	var linear$1 = function linear(t) {
-	  return +t;
-	};
+	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 cubicInOut(t) {
-	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
-	}
+	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];
 
-	var defaultTiming = {
-	  time: null,
-	  // Set on use.
-	  delay: 0,
-	  duration: 250,
-	  ease: cubicInOut
-	};
+	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 inherit(node, id) {
-	  var timing;
+	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' }
+	//   }
 
-	  while (!(timing = node.__transition) || !(timing = timing[id])) {
-	    if (!(node = node.parentNode)) {
-	      throw new Error("transition ".concat(id, " not found"));
+	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 timing;
+	    return acc;
+	  }, []);
 	}
 
-	function selection_transition (name) {
-	  var id, timing;
+	var uncurryThis$d = functionUncurryThis;
 
-	  if (name instanceof Transition) {
-	    id = name._id, name = name._name;
-	  } else {
-	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
-	  }
+	// `thisNumberValue` abstract operation
+	// https://tc39.es/ecma262/#sec-thisnumbervalue
+	var thisNumberValue$3 = uncurryThis$d(1.0.valueOf);
+
+	var DESCRIPTORS$3 = descriptors;
+	var global$a = global$1o;
+	var uncurryThis$c = functionUncurryThis;
+	var isForced = isForced_1;
+	var redefine$2 = redefine$h.exports;
+	var hasOwn$1 = hasOwnProperty_1;
+	var inheritIfRequired = inheritIfRequired$4;
+	var isPrototypeOf = objectIsPrototypeOf;
+	var isSymbol$1 = isSymbol$6;
+	var toPrimitive$1 = toPrimitive$3;
+	var fails$8 = fails$V;
+	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+	var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+	var defineProperty = objectDefineProperty.f;
+	var thisNumberValue$2 = thisNumberValue$3;
+	var trim$2 = stringTrim.trim;
 
-	  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));
+	var NUMBER = 'Number';
+	var NativeNumber = global$a[NUMBER];
+	var NumberPrototype = NativeNumber.prototype;
+	var TypeError$4 = global$a.TypeError;
+	var arraySlice$1 = uncurryThis$c(''.slice);
+	var charCodeAt$1 = uncurryThis$c(''.charCodeAt);
+
+	// `ToNumeric` abstract operation
+	// https://tc39.es/ecma262/#sec-tonumeric
+	var toNumeric = function (value) {
+	  var primValue = toPrimitive$1(value, 'number');
+	  return typeof primValue == 'bigint' ? primValue : toNumber$1(primValue);
+	};
+
+	// `ToNumber` abstract operation
+	// https://tc39.es/ecma262/#sec-tonumber
+	var toNumber$1 = function (argument) {
+	  var it = toPrimitive$1(argument, 'number');
+	  var first, third, radix, maxCode, digits, length, index, code;
+	  if (isSymbol$1(it)) throw TypeError$4('Cannot convert a Symbol value to a number');
+	  if (typeof it == 'string' && it.length > 2) {
+	    it = trim$2(it);
+	    first = charCodeAt$1(it, 0);
+	    if (first === 43 || first === 45) {
+	      third = charCodeAt$1(it, 2);
+	      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
+	    } else if (first === 48) {
+	      switch (charCodeAt$1(it, 1)) {
+	        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
+	        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+	        default: return +it;
 	      }
+	      digits = arraySlice$1(it, 2);
+	      length = digits.length;
+	      for (index = 0; index < length; index++) {
+	        code = charCodeAt$1(digits, 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;
+	};
 
-	  return new Transition(groups, this._parents, name, id);
+	// `Number` constructor
+	// https://tc39.es/ecma262/#sec-number-constructor
+	if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+	  var NumberWrapper = function Number(value) {
+	    var n = arguments.length < 1 ? 0 : NativeNumber(toNumeric(value));
+	    var dummy = this;
+	    // check on 1..constructor(foo) case
+	    return isPrototypeOf(NumberPrototype, dummy) && fails$8(function () { thisNumberValue$2(dummy); })
+	      ? inheritIfRequired(Object(n), dummy, NumberWrapper) : n;
+	  };
+	  for (var keys = DESCRIPTORS$3 ? getOwnPropertyNames(NativeNumber) : (
+	    // ES3:
+	    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+	    // ES2015 (in case, if modules with ES2015 Number statics required before):
+	    'EPSILON,MAX_SAFE_INTEGER,MIN_SAFE_INTEGER,isFinite,isInteger,isNaN,isSafeInteger,parseFloat,parseInt,' +
+	    // ESNext
+	    'fromString,range'
+	  ).split(','), j$1 = 0, key; keys.length > j$1; j$1++) {
+	    if (hasOwn$1(NativeNumber, key = keys[j$1]) && !hasOwn$1(NumberWrapper, key)) {
+	      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
+	    }
+	  }
+	  NumberWrapper.prototype = NumberPrototype;
+	  NumberPrototype.constructor = NumberWrapper;
+	  redefine$2(global$a, NUMBER, NumberWrapper);
 	}
 
-	selection.prototype.interrupt = selection_interrupt;
-	selection.prototype.transition = selection_transition;
-
-	var constant$3 = (function (x) {
-	  return function () {
-	    return x;
-	  };
-	});
+	var diacritics = {};
 
-	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
-	    }
-	  });
-	}
+	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 = {};
 
-	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);
+	for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
+	  var chars = replacementList[i$1].chars;
 
-	function nopropagation$1(event) {
-	  event.stopImmediatePropagation();
-	}
-	function noevent$1 (event) {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
+	  for (var j = 0; j < chars.length; j += 1) {
+	    diacriticsMap[chars[j]] = replacementList[i$1].base;
+	  }
 	}
 
-	// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
-
-	function defaultFilter$1(event) {
-	  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+	function removeDiacritics(str) {
+	  return str.replace(/[^\u0000-\u007e]/g, function (c) {
+	    return diacriticsMap[c] || c;
+	  });
 	}
 
-	function defaultExtent() {
-	  var e = this;
+	diacritics.replacementList = replacementList;
+	diacritics.diacriticsMap = diacriticsMap;
 
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
+	var lib = {};
 
-	    if (e.hasAttribute("viewBox")) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
-	    }
+	var isArabic$1 = {};
 
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-	  }
+	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
+	];
 
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
-	}
+	function isArabic(_char) {
+	  if (_char.length > 1) {
+	    // allow the newer chars?
+	    throw new Error('isArabic works on only one-character strings');
+	  }
 
-	function defaultTransform() {
-	  return this.__zoom || identity$2;
-	}
+	  var code = _char.charCodeAt(0);
 
-	function defaultWheelDelta(event) {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
-	}
+	  for (var i = 0; i < arabicBlocks.length; i++) {
+	    var block = arabicBlocks[i];
 
-	function defaultTouchable$1() {
-	  return navigator.maxTouchPoints || "ontouchstart" in this;
-	}
+	    if (code >= block[0] && code <= block[1]) {
+	      return true;
+	    }
+	  }
 
-	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 false;
 	}
 
-	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,
-	      touchfirst,
-	      touchending,
-	      touchDelay = 500,
-	      wheelDelay = 150,
-	      clickDistance2 = 0,
-	      tapDistance = 10;
+	isArabic$1.isArabic = isArabic;
 
-	  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)");
+	function isMath(_char2) {
+	  if (_char2.length > 2) {
+	    // allow the newer chars?
+	    throw new Error('isMath works on only one-character strings');
 	  }
 
-	  zoom.transform = function (collection, transform, point, event) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    selection.property("__zoom", defaultTransform);
+	  var code = _char2.charCodeAt(0);
 
-	    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();
-	      });
-	    }
-	  };
+	  return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+	}
 
-	  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);
-	  };
+	isArabic$1.isMath = isMath;
 
-	  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);
-	  };
+	var GlyphSplitter$1 = {};
 
-	  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);
-	  };
+	var reference = {};
 
-	  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);
-	  };
+	var unicodeArabic = {};
 
-	  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);
+	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"]
 	  }
+	};
 
-	  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);
-	  }
+	unicodeArabic["default"] = arabicReference;
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
+	var unicodeLigatures = {};
 
-	  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);
-	      };
-	    });
+	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"
+	  },
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+	  },
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+	  "\u062D\u064A": {
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+	  "\u062C\u064A": {
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+	    "final": "\uFD25",
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+	    "medial": "\uFD37"
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+	    "medial": "\uFD38"
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+	    "medial": "\uFD39"
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+	  "\u0636\u0631": {
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+	    "final": "\uFD2C"
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+	  "\u0633\u062C\u0649": {
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+	    "initial": "\uFD60"
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+	  },
+	  "\u0633\u0645\u0645": {
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+	    "initial": "\uFDC5"
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+	    "initial": "\uFD68"
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+	  "\u0634\u062C\u064A": {
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+	  },
+	  "\u0634\u0645\u062E": {
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+	    "initial": "\uFD6B"
+	  },
+	  "\u0634\u0645\u0645": {
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+	    "initial": "\uFD6D"
+	  },
+	  "\u0636\u062D\u0649": {
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+	  },
+	  "\u0636\u062E\u0645": {
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+	    "initial": "\uFD70"
+	  },
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+	  },
+	  "\u0637\u0645\u062D": {
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+	  },
+	  "\u0637\u0645\u0645": {
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+	  },
+	  "\u0637\u0645\u064A": {
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+	  },
+	  "\u0639\u062C\u0645": {
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+	    "initial": "\uFDC4"
+	  },
+	  "\u0639\u0645\u0645": {
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+	    "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": {
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+	    "initial": "\uFDB5"
+	  },
+	  "\u0644\u062D\u064A": {
+	    "final": "\uFD81"
+	  },
+	  "\u0644\u062D\u0649": {
+	    "final": "\uFD82"
+	  },
+	  "\u0644\u062C\u062C": {
+	    "initial": "\uFD83",
+	    "final": "\uFD84"
+	  },
+	  "\u0644\u062E\u0645": {
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+	    "initial": "\uFD86"
+	  },
+	  "\u0644\u0645\u062D": {
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+	    "initial": "\uFD88"
+	  },
+	  "\u0645\u062D\u062C": {
+	    "initial": "\uFD89"
+	  },
+	  "\u0645\u062D\u0645": {
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+	  },
+	  "\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"
+	  },
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+	  },
+	  "\u0643\u0645\u064A": {
+	    "final": "\uFDB7"
+	  },
+	  "\u0646\u062C\u062D": {
+	    "initial": "\uFDB8",
+	    "final": "\uFDBD"
+	  },
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+	    "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"
 	  }
+	};
 
-	  function gesture(that, args, clean) {
-	    return !clean && that.__zooming || new Gesture(that, args);
-	  }
+	unicodeLigatures["default"] = ligatureReference;
 
-	  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;
-	  }
+	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]);
+	//   }
+	// }
 
-	  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");
-	      }
+	var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+	reference.tashkeel = tashkeel;
 
-	      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 addToTashkeel(start, finish) {
+	  for (var i = start; i <= finish; i++) {
+	    reference.tashkeel = tashkeel += String.fromCharCode(i);
+	  }
+	}
 
-	      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);
-	    }
-	  };
+	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;
 
-	  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];
-	    }
+	function addToLineBreakers(start, finish) {
+	  for (var i = start; i <= finish; i++) {
+	    reference.lineBreakers = lineBreakers += String.fromCharCode(i);
+	  }
+	}
 
-	    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.
+	addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
 
-	    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);
-	      }
+	addToLineBreakers(0x0621, 0x0625);
+	addToLineBreakers(0x062F, 0x0632);
+	addToLineBreakers(0x0660, 0x066D); // numerals, math
 
-	      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();
-	        }
+	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
 
-	    noevent$1(event);
-	    g.wheel = setTimeout(wheelidled, wheelDelay);
-	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+	// numerals, math
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
+	addToLineBreakers(0x10E60, 0x10E7F);
+	addToLineBreakers(0x1EC70, 0x1ECBF);
+	addToLineBreakers(0x1EE00, 0x1EEFF);
+
+	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);
 	    }
-	  }
 
-	  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];
+	    if (reference_1$5.tashkeel.indexOf(letter) === -1) {
+	      lastLetter = letter;
 	    }
+	  });
+	  return letters;
+	}
 
-	    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$1(event);
-	    g.mouse = [p, this.__zoom.invert(p)];
-	    interrupt(this);
-	    g.start();
+	GlyphSplitter$1.GlyphSplitter = GlyphSplitter;
 
-	    function mousemoved(event) {
-	      noevent$1(event);
+	var BaselineSplitter$1 = {};
 
-	      if (!g.moved) {
-	        var dx = event.clientX - x0,
-	            dy = event.clientY - y0;
-	        g.moved = dx * dx + dy * dy > clickDistance2;
+	Object.defineProperty(BaselineSplitter$1, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$5 = isArabic$1;
+	var reference_1$4 = reference;
+
+	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;
 	      }
-
-	      g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+	    } else {
+	      letters.push(letter);
 	    }
 
-	    function mouseupped(event) {
-	      v.on("mousemove.zoom mouseup.zoom", null);
-	      yesdrag(event.view, g.moved);
-	      noevent$1(event);
-	      g.event(event).end();
+	    if (reference_1$4.tashkeel.indexOf(letter) === -1) {
+	      // don't allow tashkeel to hide line break
+	      lastLetter = letter;
 	    }
-	  }
+	  });
+	  return letters;
+	}
 
-	  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];
-	    }
+	BaselineSplitter$1.BaselineSplitter = BaselineSplitter;
 
-	    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$1(event);
-	    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
+	var Normalization = {};
+
+	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;
+
+	function Normal(word, breakPresentationForm) {
+	  // default is to turn initial/isolated/medial/final presentation form to generic
+	  if (typeof breakPresentationForm === 'undefined') {
+	    breakPresentationForm = true;
 	  }
 
-	  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 returnable = '';
+	  word.split('').forEach(function (letter) {
+	    if (!isArabic_1$4.isArabic(letter)) {
+	      returnable += letter;
+	      return;
 	    }
 
-	    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$1(event);
+	    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);
 
-	    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;
-	    }
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
-	    if (started) {
-	      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
-	        touchstarting = null;
-	      }, touchDelay);
-	      interrupt(this);
-	      g.start();
-	    }
-	  }
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
-	  function touchmoved(event) {
-	    if (!this.__zooming) 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'];
+	                  }
 
-	    for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
-	      args[_key5 - 1] = arguments[_key5];
-	    }
+	                  return;
+	                } // console.log('keeping this letter');
 
-	    var g = gesture(this, args).event(event),
-	        touches = event.changedTouches,
-	        n = touches.length,
-	        i,
-	        t,
-	        p,
-	        l;
-	    noevent$1(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;
-	    }
+	                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');
 
-	    t = g.that.__zoom;
+	                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'];
+	            }
 
-	    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;
+	            return;
+	          } // console.log('keeping this letter');
 
-	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
 
-	  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];
-	    }
+	          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');
 
-	    if (!this.__zooming) return;
-	    var g = gesture(this, args).event(event),
-	        touches = event.changedTouches,
-	        n = touches.length,
-	        i,
-	        t;
-	    nopropagation$1(event);
-	    if (touchending) clearTimeout(touchending);
-	    touchending = setTimeout(function () {
-	      touchending = null;
-	    }, touchDelay);
+	          return;
+	        }
+	      }
+	    } // try ligatures
 
-	    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.
+	    for (var v2 = 0; v2 < reference_1$3.ligatureList.length; v2++) {
+	      var normalForm = reference_1$3.ligatureList[v2];
 
-	      if (g.taps === 2) {
-	        t = pointer(t, this);
+	      if (normalForm !== 'words') {
+	        var ligForms = Object.keys(unicode_ligatures_1$1["default"][normalForm]);
 
-	        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);
+	        for (var f = 0; f < ligForms.length; f++) {
+	          if (unicode_ligatures_1$1["default"][normalForm][ligForms[f]] === letter) {
+	            returnable += normalForm;
+	            return;
+	          }
 	        }
 	      }
-	    }
-	  }
-
-	  zoom.wheelDelta = function (_) {
-	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
-	  };
+	    } // try words ligatures
 
-	  zoom.filter = function (_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
-	  };
 
-	  zoom.touchable = function (_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
-	  };
+	    for (var v3 = 0; v3 < reference_1$3.ligatureWordList.length; v3++) {
+	      var _normalForm = reference_1$3.ligatureWordList[v3];
 
-	  zoom.extent = function (_) {
-	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-	  };
+	      if (unicode_ligatures_1$1["default"].words[_normalForm] === letter) {
+	        returnable += _normalForm;
+	        return;
+	      }
+	    }
 
-	  zoom.scaleExtent = function (_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-	  };
+	    returnable += letter; // console.log('kept the letter')
+	  });
+	  return returnable;
+	}
 
-	  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]]];
-	  };
+	Normalization.Normal = Normal;
 
-	  zoom.constrain = function (_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	var CharShaper$1 = {};
 
-	  zoom.duration = function (_) {
-	    return arguments.length ? (duration = +_, zoom) : duration;
-	  };
+	Object.defineProperty(CharShaper$1, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$1 = unicodeArabic;
+	var isArabic_1$3 = isArabic$1;
+	var reference_1$2 = reference;
 
-	  zoom.interpolate = function (_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	function CharShaper(letter, form) {
+	  if (!isArabic_1$3.isArabic(letter)) {
+	    // fail not Arabic
+	    throw new Error('Not Arabic');
+	  }
 
-	  zoom.on = function () {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
-	  };
+	  if (letter === "\u0621") {
+	    // hamza alone
+	    return "\u0621";
+	  }
 
-	  zoom.clickDistance = function (_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
-	  };
+	  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);
 
-	  zoom.tapDistance = function (_) {
-	    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
-	  };
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	  return zoom;
-	}
+	      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);
 
-	/*
-	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
-	    * Antimeridian clipping
-	    * Spherical rotation
-	    * Resampling
-	*/
+	        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 geoRawMercator() {
-	  var project = mercatorRaw;
-	  var k = 512 / Math.PI; // scale
+	CharShaper$1.CharShaper = CharShaper;
 
-	  var x = 0;
-	  var y = 0; // translate
+	var WordShaper$2 = {};
 
-	  var clipExtent = [[0, 0], [0, 0]];
+	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 projection(point) {
-	    point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
-	    return [point[0] * k + x, y - point[1] * k];
-	  }
+	function WordShaper$1(word) {
+	  var state = 'initial';
+	  var output = '';
 
-	  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];
-	  };
+	  for (var w = 0; w < word.length; w++) {
+	    var nextLetter = ' ';
 
-	  projection.scale = function (_) {
-	    if (!arguments.length) return k;
-	    k = +_;
-	    return projection;
-	  };
+	    for (var nxw = w + 1; nxw < word.length; nxw++) {
+	      if (!isArabic_1$2.isArabic(word[nxw])) {
+	        break;
+	      }
 
-	  projection.translate = function (_) {
-	    if (!arguments.length) return [x, y];
-	    x = +_[0];
-	    y = +_[1];
-	    return projection;
-	  };
+	      if (reference_1$1.tashkeel.indexOf(word[nxw]) === -1) {
+	        nextLetter = word[nxw];
+	        break;
+	      }
+	    }
 
-	  projection.clipExtent = function (_) {
-	    if (!arguments.length) return clipExtent;
-	    clipExtent = _;
-	    return projection;
-	  };
+	    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'];
 
-	  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;
-	  };
+	      while (word[w] !== nextLetter) {
+	        w++;
+	      }
 
-	  projection.stream = d3_geoTransform({
-	    point: function point(x, y) {
-	      var vec = projection([x, y]);
-	      this.stream.point(vec[0], vec[1]);
+	      state = 'initial';
+	    } else {
+	      output += CharShaper_1$1.CharShaper(word[w], state);
+	      state = 'medial';
 	    }
-	  }).stream;
-	  return projection;
+	  }
+
+	  return output;
 	}
 
-	function geoOrthoNormalizedDotProduct(a, b, origin) {
-	  if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
-	    return 1; // coincident points, treat as straight and try to remove
+	WordShaper$2.WordShaper = WordShaper$1;
+
+	var ParentLetter$1 = {};
+
+	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');
 	  }
 
-	  return geoVecNormalizedDot(a, b, origin);
-	}
+	  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);
 
-	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
-	  var val = Math.abs(dotp);
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	  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
+	      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;
 	  }
 	}
 
-	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);
-
-	  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
+	ParentLetter$1.ParentLetter = ParentLetter;
 
-	    score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	function GrandparentLetter(letter) {
+	  if (!isArabic_1$1.isArabic(letter)) {
+	    throw new Error('Not an Arabic letter');
 	  }
 
-	  return score;
-	} // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
+	  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);
 
-	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
-	  var max = -Infinity;
-	  var first = isClosed ? 0 : 1;
-	  var last = isClosed ? coords.length : coords.length - 1;
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	  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;
+	      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;
 	  }
+	}
 
-	  if (max === -Infinity) return null;
-	  return max;
-	} // similar to geoOrthoCalcScore, but returns quickly if there is something to do
+	ParentLetter$1.GrandparentLetter = GrandparentLetter;
 
-	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);
+	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;
 
-	  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
+	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 (Math.abs(dotp) > 0) return 1; // something to do
+	  if (arabicRegex.test(inputText)) {
+	    inputText = WordShaper(inputText);
+	  }
 
-	    score = 0; // already square
+	  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 = [];
+	      }
+	    }
 	  }
 
-	  return score;
+	  ret += rtlBuffer.reverse().join('');
+	  return ret;
 	}
 
-	var onFreeze = internalMetadata.onFreeze;
+	var DESCRIPTORS$2 = descriptors;
+	var uncurryThis$b = functionUncurryThis;
+	var objectKeys = objectKeys$4;
+	var toIndexedObject = toIndexedObject$d;
+	var $propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
-	var nativeFreeze = Object.freeze;
-	var FAILS_ON_PRIMITIVES$4 = fails(function () { nativeFreeze(1); });
+	var propertyIsEnumerable = uncurryThis$b($propertyIsEnumerable);
+	var push$2 = uncurryThis$b([].push);
 
-	// `Object.freeze` method
-	// https://tc39.github.io/ecma262/#sec-object.freeze
-	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !freezing }, {
-	  freeze: function freeze(it) {
-	    return nativeFreeze && isObject(it) ? nativeFreeze(onFreeze(it)) : it;
+	// `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$2 || propertyIsEnumerable(O, key)) {
+	        push$2(result, TO_ENTRIES ? [key, O[key]] : O[key]);
+	      }
+	    }
+	    return result;
+	  };
+	};
+
+	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)
+	};
+
+	var $$r = _export;
+	var $values = objectToArray.values;
+
+	// `Object.values` method
+	// https://tc39.es/ecma262/#sec-object.values
+	$$r({ target: 'Object', stat: true }, {
+	  values: function values(O) {
+	    return $values(O);
 	  }
 	});
 
-	// 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;
+	// https://github.com/openstreetmap/iD/issues/772
+	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
+	var _storage;
 
-	  while (i--) {
-	    if (a[i] !== b[i]) return false;
+	try {
+	  _storage = localStorage;
+	} catch (e) {} // eslint-disable-line no-empty
+
+
+	_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];
+	    }
+	  };
+	}();
+
+	var _listeners = {}; //
+	// 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
+	 */
+
+	function corePreferences(k, v) {
+	  try {
+	    if (v === undefined) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
+
+	    if (_listeners[k]) {
+	      _listeners[k].forEach(function (handler) {
+	        return handler(v);
+	      });
+	    }
+
+	    return true;
+	  } catch (e) {
+	    /* eslint-disable no-console */
+	    if (typeof console !== 'undefined') {
+	      console.error('localStorage quota exceeded');
+	    }
+	    /* eslint-enable no-console */
+
+
+	    return false;
 	  }
+	} // adds an event listener which is triggered whenever
 
-	  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]
+	corePreferences.onChange = function (k, handler) {
+	  _listeners[k] = _listeners[k] || [];
 
-	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]
+	  _listeners[k].push(handler);
+	};
 
-	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]
+	var vparse = {exports: {}};
 
-	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 (module) {
+	  (function (window) {
 
-	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 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 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 compare(v) {
+	      if (typeof v === 'string') {
+	        v = parseVersion(v);
+	      }
 
-	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' }
-	//   ]
+	      for (var i = 0; i < 4; i++) {
+	        if (this.parsed[i] !== v.parsed[i]) {
+	          return this.parsed[i] > v.parsed[i] ? 1 : -1;
+	        }
+	      }
+
+	      return 0;
+	    }
+	    /* istanbul ignore next */
+
+
+	    if (module && 'object' === 'object') {
+	      module.exports = parseVersion;
+	    } else {
+	      window.parseVersion = parseVersion;
+	    }
+	  })(commonjsGlobal);
+	})(vparse);
+
+	var parseVersion = vparse.exports;
+
+	var name = "iD";
+	var version = "2.20.4";
+	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 test:spec","test:spec":"karma start karma.conf.js",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":"~5.0.0","@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:"^4.3.4","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",chalk:"^4.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0","fetch-mock":"^9.11.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.2","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",karma:"^6.3.5","karma-chrome-launcher":"^3.1.0","karma-coverage":"^2.0.3","karma-mocha":"^2.0.1","karma-remap-istanbul":"^0.6.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^8.4.0","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",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:"^11.1.2","sinon-chai":"^3.7.0",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
 	//
-	// 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];
+	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
 
-	    if (val && !seen.has(val)) {
-	      seen.add(val);
-	      acc.push(item);
+	  _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]);
 	    }
 
-	    return acc;
-	  }, []);
-	}
+	    var file = _fileMap[which];
 
-	// @@match logic
-	fixRegexpWellKnownSymbolLogic('match', 1, function (MATCH, nativeMatch, maybeCallNative) {
-	  return [
-	    // `String.prototype.match` method
-	    // https://tc39.github.io/ecma262/#sec-string.prototype.match
-	    function match(regexp) {
-	      var O = requireObjectCoercible(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.github.io/ecma262/#sec-regexp.prototype-@@match
-	    function (regexp) {
-	      var res = maybeCallNative(nativeMatch, regexp, this);
-	      if (res.done) return res.value;
+	    var url = file && _this.asset(file);
 
-	      var rx = anObject(regexp);
-	      var S = String(this);
+	    if (!url) {
+	      return Promise.reject("Unknown data file for \"".concat(which, "\""));
+	    }
 
-	      if (!rx.global) return regexpExecAbstract(rx, S);
+	    var prom = _inflight[url];
 
-	      var fullUnicode = rx.unicode;
-	      rx.lastIndex = 0;
-	      var A = [];
-	      var n = 0;
-	      var result;
-	      while ((result = regexpExecAbstract(rx, S)) !== null) {
-	        var matchStr = String(result[0]);
-	        A[n] = matchStr;
-	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
-	        n++;
-	      }
-	      return n === 0 ? null : A;
+	    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);
+	        }
+
+	        if (response.status === 204 || response.status === 205) return; // No Content, Reset Content
+
+	        return response.json();
+	      }).then(function (result) {
+	        delete _inflight[url];
+
+	        if (!result) {
+	          throw new Error("No data loaded for \"".concat(which, "\""));
+	        }
+
+	        _cachedData[which] = result;
+	        return result;
+	      })["catch"](function (err) {
+	        delete _inflight[url];
+	        throw err;
+	      });
 	    }
-	  ];
-	});
 
-	var remove$1 = 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 = {};
+	    return prom;
+	  }; // Accessor for the file map
 
-	for (var i = 0; i < replacementList.length; i += 1) {
-	  var chars = replacementList[i].chars;
 
-	  for (var j$1 = 0; j$1 < chars.length; j$1 += 1) {
-	    diacriticsMap[chars[j$1]] = replacementList[i].base;
-	  }
-	}
+	  _this.fileMap = function (val) {
+	    if (!arguments.length) return _fileMap;
+	    _fileMap = val;
+	    return _this;
+	  };
 
-	function removeDiacritics(str) {
-	  return str.replace(/[^\u0000-\u007e]/g, function (c) {
-	    return diacriticsMap[c] || c;
-	  });
+	  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 replacementList_1 = replacementList;
-	var diacriticsMap_1 = diacriticsMap;
-	var diacritics = {
-	  remove: remove$1,
-	  replacementList: replacementList_1,
-	  diacriticsMap: diacriticsMap_1
+	var global$9 = global$1o;
+	var toIntegerOrInfinity$1 = toIntegerOrInfinity$b;
+	var toString$7 = toString$k;
+	var requireObjectCoercible$6 = requireObjectCoercible$e;
+
+	var RangeError$5 = global$9.RangeError;
+
+	// `String.prototype.repeat` method implementation
+	// https://tc39.es/ecma262/#sec-string.prototype.repeat
+	var stringRepeat = function repeat(count) {
+	  var str = toString$7(requireObjectCoercible$6(this));
+	  var result = '';
+	  var n = toIntegerOrInfinity$1(count);
+	  if (n < 0 || n == Infinity) throw RangeError$5('Wrong number of repetitions');
+	  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
+	  return result;
 	};
 
-	var isArabic_1 = createCommonjsModule(function (module, exports) {
+	var $$q = _export;
+	var global$8 = global$1o;
+	var uncurryThis$a = functionUncurryThis;
+	var toIntegerOrInfinity = toIntegerOrInfinity$b;
+	var thisNumberValue$1 = thisNumberValue$3;
+	var $repeat$1 = stringRepeat;
+	var fails$7 = fails$V;
 
-	  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
-	  ];
+	var RangeError$4 = global$8.RangeError;
+	var String$1 = global$8.String;
+	var floor$2 = Math.floor;
+	var repeat$2 = uncurryThis$a($repeat$1);
+	var stringSlice$3 = uncurryThis$a(''.slice);
+	var un$ToFixed = uncurryThis$a(1.0.toFixed);
+
+	var pow$1 = function (x, n, acc) {
+	  return n === 0 ? acc : n % 2 === 1 ? pow$1(x, n - 1, acc * x) : pow$1(x * x, n / 2, acc);
+	};
+
+	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$2(c2 / 1e7);
+	  }
+	};
+
+	var divide = function (data, n) {
+	  var index = 6;
+	  var c = 0;
+	  while (--index >= 0) {
+	    c += data[index];
+	    data[index] = floor$2(c / n);
+	    c = (c % n) * 1e7;
+	  }
+	};
 
-	  function isArabic(_char) {
-	    if (_char.length > 1) {
-	      // allow the newer chars?
-	      throw new Error('isArabic works on only one-character strings');
+	var dataToString = function (data) {
+	  var index = 6;
+	  var s = '';
+	  while (--index >= 0) {
+	    if (s !== '' || index === 0 || data[index] !== 0) {
+	      var t = String$1(data[index]);
+	      s = s === '' ? t : s + repeat$2('0', 7 - t.length) + t;
 	    }
+	  } return s;
+	};
 
-	    var code = _char.charCodeAt(0);
+	var FORCED$6 = fails$7(function () {
+	  return un$ToFixed(0.00008, 3) !== '0.000' ||
+	    un$ToFixed(0.9, 0) !== '1' ||
+	    un$ToFixed(1.255, 2) !== '1.25' ||
+	    un$ToFixed(1000000000000000128.0, 0) !== '1000000000000000128';
+	}) || !fails$7(function () {
+	  // V8 ~ Android 4.3-
+	  un$ToFixed({});
+	});
 
-	    for (var i = 0; i < arabicBlocks.length; i++) {
-	      var block = arabicBlocks[i];
+	// `Number.prototype.toFixed` method
+	// https://tc39.es/ecma262/#sec-number.prototype.tofixed
+	$$q({ target: 'Number', proto: true, forced: FORCED$6 }, {
+	  toFixed: function toFixed(fractionDigits) {
+	    var number = thisNumberValue$1(this);
+	    var fractDigits = toIntegerOrInfinity(fractionDigits);
+	    var data = [0, 0, 0, 0, 0, 0];
+	    var sign = '';
+	    var result = '0';
+	    var e, z, j, k;
 
-	      if (code >= block[0] && code <= block[1]) {
-	        return true;
+	    // TODO: ES2018 increased the maximum number of fraction digits to 100, need to improve the implementation
+	    if (fractDigits < 0 || fractDigits > 20) throw RangeError$4('Incorrect fraction digits');
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (number != number) return 'NaN';
+	    if (number <= -1e21 || number >= 1e21) return String$1(number);
+	    if (number < 0) {
+	      sign = '-';
+	      number = -number;
+	    }
+	    if (number > 1e-21) {
+	      e = log(number * pow$1(2, 69, 1)) - 69;
+	      z = e < 0 ? number * pow$1(2, -e, 1) : number / pow$1(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$1(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('0', fractDigits);
 	      }
 	    }
-
-	    return false;
+	    if (fractDigits > 0) {
+	      k = result.length;
+	      result = sign + (k <= fractDigits
+	        ? '0.' + repeat$2('0', fractDigits - k) + result
+	        : stringSlice$3(result, 0, k - fractDigits) + '.' + stringSlice$3(result, k - fractDigits));
+	    } else {
+	      result = sign + result;
+	    } return result;
 	  }
+	});
 
-	  exports.isArabic = isArabic;
+	var global$7 = global$1o;
 
-	  function isMath(_char2) {
-	    if (_char2.length > 2) {
-	      // allow the newer chars?
-	      throw new Error('isMath works on only one-character strings');
-	    }
+	var globalIsFinite = global$7.isFinite;
+
+	// `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 code = _char2.charCodeAt(0);
+	var $$p = _export;
+	var numberIsFinite = numberIsFinite$1;
 
-	    return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
-	  }
+	// `Number.isFinite` method
+	// https://tc39.es/ecma262/#sec-number.isfinite
+	$$p({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
+
+	var $$o = _export;
+	var global$6 = global$1o;
+	var uncurryThis$9 = functionUncurryThis;
+	var toAbsoluteIndex = toAbsoluteIndex$9;
+
+	var RangeError$3 = global$6.RangeError;
+	var fromCharCode$1 = String.fromCharCode;
+	// eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
+	var $fromCodePoint = String.fromCodePoint;
+	var join$2 = uncurryThis$9([].join);
+
+	// length should be 1, old FF problem
+	var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;
 
-	  exports.isMath = isMath;
+	// `String.fromCodePoint` method
+	// https://tc39.es/ecma262/#sec-string.fromcodepoint
+	$$o({ 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$3(code + ' is not a valid code point');
+	      elements[i] = code < 0x10000
+	        ? fromCharCode$1(code)
+	        : fromCharCode$1(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00);
+	    } return join$2(elements, '');
+	  }
 	});
 
-	var unicodeArabic = createCommonjsModule(function (module, exports) {
+	var call$1 = functionCall;
+	var fixRegExpWellKnownSymbolLogic = fixRegexpWellKnownSymbolLogic;
+	var anObject = anObject$n;
+	var requireObjectCoercible$5 = requireObjectCoercible$e;
+	var sameValue = sameValue$1;
+	var toString$6 = toString$k;
+	var getMethod = getMethod$7;
+	var regExpExec = regexpExecAbstract;
 
-	  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"]
+	// @@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 : getMethod(regexp, SEARCH);
+	      return searcher ? call$1(searcher, regexp, O) : new RegExp(regexp)[SEARCH](toString$6(O));
 	    },
-	    "african noon": {
-	      "normal": ["\u08BD"]
+	    // `RegExp.prototype[@@search]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
+	    function (string) {
+	      var rx = anObject(this);
+	      var S = toString$6(string);
+	      var res = maybeCallNative(nativeSearch, rx, S);
+
+	      if (res.done) return res.value;
+
+	      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;
 	    }
-	  };
-	  exports["default"] = arabicReference;
+	  ];
 	});
 
-	var unicodeLigatures = createCommonjsModule(function (module, exports) {
+	var rbush$2 = {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"
+	var quickselect$2 = {exports: {}};
+
+	(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);
+	    }
+
+	    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--;
+
+	          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 (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 defaultCompare(a, b) {
+	      return a < b ? -1 : a > b ? 1 : 0;
+	    }
+
+	    return quickselect;
+	  });
+	})(quickselect$2);
+
+	rbush$2.exports = rbush$1;
+
+	rbush$2.exports["default"] = rbush$1;
+
+	var quickselect$1 = quickselect$2.exports;
+
+	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
+
+	  this._maxEntries = Math.max(4, maxEntries || 9);
+	  this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+
+	  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 (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : 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();
+	    }
+
+	    return result;
+	  },
+	  collides: function collides(bbox) {
+	    var node = this.data,
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return false;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
+
+	    while (node) {
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
+
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf || contains$1(bbox, childBBox)) return true;
+	          nodesToSearch.push(child);
+	        }
+	      }
+
+	      node = nodesToSearch.pop();
+	    }
+
+	    return false;
+	  },
+	  load: function load(data) {
+	    if (!(data && data.length)) return this;
+
+	    if (data.length < this._minEntries) {
+	      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
+
+
+	    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;
+	    } 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
+
+
+	      this._insert(node, this.data.height - node.height - 1, true);
+	    }
+
+	    return this;
+	  },
+	  insert: function insert(item) {
+	    if (item) this._insert(item, this.data.height - 1);
+	    return this;
+	  },
+	  clear: function clear() {
+	    this.data = createNode$1([]);
+	    return this;
+	  },
+	  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
+
+	    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
+	        index = findItem$1(item, node.children, equalsFn);
+
+	        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;
+	        }
+	      }
+
+	      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
+
+	    }
+
+	    return this;
+	  },
+	  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;
+	  },
+	  _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();
+	    }
+
+	    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$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 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; // split the items into M mostly square tiles
+
+	    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);
+
+	    for (i = left; i <= right; i += N1) {
+	      right2 = Math.min(i + N1 - 1, right);
+	      multiSelect$1(items, i, right2, N2, this.compareMinY);
+
+	      for (j = i; j <= right2; j += N2) {
+	        right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+
+	        node.children.push(this._build(items, j, right3, height - 1));
+	      }
+	    }
+
+	    calcBBox$1(node, this.toBBox);
+	    return node;
+	  },
+	  _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+	    var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+
+	    while (true) {
+	      path.push(node);
+	      if (node.leaf || path.length - 1 === level) break;
+	      minArea = minEnlargement = Infinity;
+
+	      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];
+	    }
+
+	    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
+
+	    var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
+
+
+	    node.children.push(item);
+	    extend$2(node, bbox); // 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;
+	    } // adjust bboxes along the insertion path
+
+
+	    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$1(node.children.splice(splitIndex, node.children.length - splitIndex));
+	    newNode.height = node.height;
+	    newNode.leaf = node.leaf;
+	    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$1([node, newNode]);
+	    this.data.height = node.height + 1;
+	    this.data.leaf = false;
+	    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;
+	  },
+	  // 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
+	  _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 (i = m; i < M - m; i++) {
+	      child = node.children[i];
+	      extend$2(leftBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(leftBBox);
+	    }
+
+	    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;
+	  },
+	  _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
+	    // adjust bboxes along the given tree path
+	    for (var i = level; i >= 0; i--) {
+	      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] + '};');
+	  }
+	};
+
+	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;
+	  }
+
+	  return -1;
+	} // 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;
+
+	  for (var i = k, child; i < p; i++) {
+	    child = node.children[i];
+	    extend$2(destNode, node.leaf ? toBBox(child) : child);
+	  }
+
+	  return destNode;
+	}
+
+	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$1(a, b) {
+	  return a.minX - b.minX;
+	}
+
+	function compareNodeMinY$1(a, b) {
+	  return a.minY - b.minY;
+	}
+
+	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);
+	}
+
+	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 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 contains$1(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
+
+	function intersects$1(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
+
+	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$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 = [];
+
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode$1(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);
+	        }
+
+	        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);
+	      }
+	    }
+
+	    codeA = lastCode;
+	  }
+
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
+
+
+	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;
+	    }
+
+	    points = result;
+	    if (!points.length) break;
+	  }
+
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
+
+
+	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
+
+
+	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 (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 whichPolygon(data) {
+	  var bboxes = [];
+
+	  for (var i = 0; i < data.features.length; i++) {
+	    var feature = data.features[i];
+	    var coords = feature.geometry.coordinates;
+
+	    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));
+	      }
+	    }
+	  }
+
+	  var tree = rbush().load(bboxes);
+
+	  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;
+	  }
+
+	  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;
+	  };
+
+	  return query;
+	}
+
+	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(polygon[i], bbox).length > 0) return true;
+	  }
+
+	  return false;
+	} // 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;
+	    }
+	  }
+
+	  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 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",
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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 || "";
+
+	  if (s.charAt(0) === ".") {
+	    return s.toUpperCase();
+	  } else {
+	    return s.replace(idFilterRegex, "").toUpperCase();
+	  }
+	}
+
+	var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
+	loadDerivedDataAndCaches(borders);
+
+	function loadDerivedDataAndCaches(borders2) {
+	  var identifierProps = ["iso1A2", "iso1A3", "m49", "wikidata", "emojiFlag", "ccTLD", "nameEn"];
+	  var geometryFeatures = [];
+
+	  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);
+	  }
+
+	  for (var _i2 in borders2.features) {
+	    var _feature2 = borders2.features[_i2];
+	    loadRoadSpeedUnit(_feature2);
+	    loadRoadHeightUnit(_feature2);
+	    loadDriveSide(_feature2);
+	    loadCallingCodes(_feature2);
+	    loadGroupGroups(_feature2);
+	  }
+
+	  for (var _i3 in borders2.features) {
+	    var _feature3 = borders2.features[_i3];
+
+	    _feature3.properties.groups.sort(function (groupID1, groupID2) {
+	      return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
+	    });
+
+	    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);
+
+	      if (diff === 0) {
+	        return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
+	      }
+
+	      return diff;
+	    });
+	  }
+
+	  var geometryOnlyCollection = {
+	    type: "FeatureCollection",
+	    features: geometryFeatures
+	  };
+	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
+
+	  function loadGroups(feature2) {
+	    var props = feature2.properties;
+
+	    if (!props.groups) {
+	      props.groups = [];
+	    }
+
+	    if (feature2.geometry && props.country) {
+	      props.groups.push(props.country);
+	    }
+
+	    if (props.m49 !== "001") {
+	      props.groups.push("001");
+	    }
+	  }
+
+	  function loadM49(feature2) {
+	    var props = feature2.properties;
+
+	    if (!props.m49 && props.iso1N3) {
+	      props.m49 = props.iso1N3;
+	    }
+	  }
+
+	  function loadTLD(feature2) {
+	    var props = feature2.properties;
+	    if (props.level === "unitedNations") return;
+
+	    if (!props.ccTLD && props.iso1A2) {
+	      props.ccTLD = "." + props.iso1A2.toLowerCase();
+	    }
+	  }
+
+	  function loadIsoStatus(feature2) {
+	    var props = feature2.properties;
+
+	    if (!props.isoStatus && props.iso1A2) {
+	      props.isoStatus = "official";
+	    }
+	  }
+
+	  function loadLevel(feature2) {
+	    var props = feature2.properties;
+	    if (props.level) return;
+
+	    if (!props.country) {
+	      props.level = "country";
+	    } else if (!props.iso1A2 || props.isoStatus === "official") {
+	      props.level = "territory";
+	    } else {
+	      props.level = "subterritory";
+	    }
+	  }
+
+	  function loadGroupGroups(feature2) {
+	    var props = feature2.properties;
+	    if (feature2.geometry || !props.members) return;
+	    var featureLevelIndex = levels.indexOf(props.level);
+	    var sharedGroups = [];
+
+	    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);
+	      });
+
+	      if (_i4 === "0") {
+	        sharedGroups = memberGroups;
+	      } else {
+	        sharedGroups = sharedGroups.filter(function (groupID) {
+	          return memberGroups.indexOf(groupID) !== -1;
+	        });
+	      }
+	    };
+
+	    for (var _i4 in props.members) {
+	      _loop(_i4);
+	    }
+
+	    props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
+	      return props.groups.indexOf(groupID) === -1;
+	    }));
+
+	    for (var j in sharedGroups) {
+	      var groupFeature = featuresByCode[sharedGroups[j]];
+
+	      if (groupFeature.properties.members.indexOf(props.id) === -1) {
+	        groupFeature.properties.members.push(props.id);
+	      }
+	    }
+	  }
+
+	  function loadRoadSpeedUnit(feature2) {
+	    var props = feature2.properties;
+
+	    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];
+	    }
+	  }
+
+	  function loadRoadHeightUnit(feature2) {
+	    var props = feature2.properties;
+
+	    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];
+	    }
+	  }
+
+	  function loadDriveSide(feature2) {
+	    var props = feature2.properties;
+
+	    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;
+	      }, [])));
+	    }
+	  }
+
+	  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;
+	  }
+
+	  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);
+	    }
+	  }
+
+	  function cacheFeatureByIDs(feature2) {
+	    var ids = [];
+
+	    for (var k in identifierProps) {
+	      var prop = identifierProps[k];
+	      var id = feature2.properties[prop];
+	      if (id) ids.push(id);
+	    }
+
+	    if (feature2.properties.aliases) {
+	      for (var j in feature2.properties.aliases) {
+	        ids.push(feature2.properties.aliases[j]);
+	      }
+	    }
+
+	    for (var _i5 in ids) {
+	      var _id = canonicalID(ids[_i5]);
+
+	      featuresByCode[_id] = feature2;
+	    }
+	  }
+	}
+
+	function locArray(loc) {
+	  if (Array.isArray(loc)) {
+	    return loc;
+	  } else if (loc.coordinates) {
+	    return loc.coordinates;
+	  }
+
+	  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 feature2 = smallestFeature(loc);
+	  if (!feature2) return null;
+	  var countryCode = feature2.properties.country || feature2.properties.iso1A2;
+	  return featuresByCode[countryCode] || null;
+	}
+
+	var defaultOpts = {
+	  level: void 0,
+	  maxLevel: void 0,
+	  withProp: void 0
+	};
+
+	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;
+	      }
+	    }
+	  }
+
+	  var features2 = featuresContaining(loc);
+
+	  for (var i in features2) {
+	    var feature2 = features2[i];
+	    var levelIndex = levels.indexOf(feature2.properties.level);
+
+	    if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
+	      if (!withProp || feature2.properties[withProp]) {
+	        return feature2;
+	      }
+	    }
+	  }
+
+	  return null;
+	}
+
+	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;
+	    }
+	  } else {
+	    stringID = canonicalID(id);
+	  }
+
+	  return featuresByCode[stringID] || null;
+	}
+
+	function smallestFeaturesForBbox(bbox) {
+	  return whichPolygonGetter.bbox(bbox).map(function (props) {
+	    return featuresByCode[props.id];
+	  });
+	}
+
+	function smallestOrMatchingFeature(query) {
+	  if (_typeof(query) === "object") {
+	    return smallestFeature(query);
+	  }
+
+	  return featureForID(query);
+	}
+
+	function feature$1(query) {
+	  var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
+
+	  if (_typeof(query) === "object") {
+	    return featureForLoc(query, opts);
+	  }
+
+	  return featureForID(query);
+	}
+
+	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 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 {
+	    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 featuresIn(id, strict) {
+	  var feature2 = featureForID(id);
+	  if (!feature2) return [];
+	  var features2 = [];
+
+	  if (!strict) {
+	    features2.push(feature2);
+	  }
+
+	  var properties = feature2.properties;
+
+	  if (properties.members) {
+	    for (var i in properties.members) {
+	      var memberID = properties.members[i];
+	      features2.push(featuresByCode[memberID]);
+	    }
+	  }
+
+	  return features2;
+	}
+
+	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 {
+	    type: "Feature",
+	    properties: features2[0].properties,
+	    geometry: {
+	      type: "MultiPolygon",
+	      coordinates: aggregateCoordinates
+	    }
+	  };
+	}
+
+	function roadSpeedUnit(query) {
+	  var feature2 = smallestOrMatchingFeature(query);
+	  return feature2 && feature2.properties.roadSpeedUnit || null;
+	}
+
+	function roadHeightUnit(query) {
+	  var feature2 = smallestOrMatchingFeature(query);
+	  return feature2 && feature2.properties.roadHeightUnit || null;
+	}
+
+	var geojsonArea = {};
+
+	var wgs84$1 = {};
+
+	wgs84$1.RADIUS = 6378137;
+	wgs84$1.FLATTENING = 1 / 298.257223563;
+	wgs84$1.POLAR_RADIUS = 6356752.3142;
+
+	var wgs84 = wgs84$1;
+	geojsonArea.geometry = geometry;
+	geojsonArea.ring = ringArea;
+
+	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 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;
+	}
+	/**
+	 * 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 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]));
+	    }
+
+	    area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	  }
+
+	  return area;
+	}
+
+	function rad(_) {
+	  return _ * Math.PI / 180;
+	}
+
+	var inputValidation = {};
+
+	var $$n = _export;
+	var $includes = arrayIncludes.includes;
+	var addToUnscopables$2 = addToUnscopables$6;
+
+	// `Array.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-array.prototype.includes
+	$$n({ target: 'Array', proto: true }, {
+	  includes: function includes(el /* , fromIndex = 0 */) {
+	    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$2('includes');
+
+	var validateCenter$1 = {};
+
+	validateCenter$1.validateCenter = 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 _center = _slicedToArray(center, 2),
+	      lng = _center[0],
+	      lat = _center[1];
+
+	  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 (lng > 180 || lng < -180) {
+	    throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
+	  }
+
+	  if (lat > 90 || lat < -90) {
+	    throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+	  }
+	};
+
+	var validateRadius$1 = {};
+
+	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)));
+	  }
+
+	  if (radius <= 0) {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+	  }
+	};
+
+	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 (numberOfEdges < 3) {
+	    throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
+	  }
+	};
+
+	var validateEarthRadius$1 = {};
+
+	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));
+	  }
+
+	  if (earthRadius <= 0) {
+	    throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
+	  }
+	};
+
+	var validateBearing$1 = {};
+
+	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));
+	  }
+	};
+
+	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;
+
+	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);
+	}
+
+	inputValidation.validateCenter = validateCenter;
+	inputValidation.validateRadius = validateRadius;
+	inputValidation.validateNumberOfEdges = validateNumberOfEdges;
+	inputValidation.validateEarthRadius = validateEarthRadius;
+	inputValidation.validateBearing = validateBearing;
+	inputValidation.validateInput = validateInput$1;
+
+	var validateInput = inputValidation.validateInput;
+	var defaultEarthRadius = 6378137; // equatorial Earth radius
+
+	function toRadians(angleInDegrees) {
+	  return angleInDegrees * Math.PI / 180;
+	}
+
+	function toDegrees(angleInRadians) {
+	  return angleInRadians * 180 / Math.PI;
+	}
+
+	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]
+	  };
+	};
+
+	function getNumberOfEdges(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return 32;
+	  } else if (isObjectNotArray(options)) {
+	    var numberOfEdges = options.numberOfEdges;
+	    return numberOfEdges === undefined ? 32 : numberOfEdges;
+	  }
+
+	  return options;
+	}
+
+	function getEarthRadius(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return defaultEarthRadius;
+	  } else if (isObjectNotArray(options)) {
+	    var earthRadius = options.earthRadius;
+	    return earthRadius === undefined ? defaultEarthRadius : earthRadius;
+	  }
+
+	  return defaultEarthRadius;
+	}
+
+	function getDirection(options) {
+	  if (isObjectNotArray(options) && options.rightHandRule) {
+	    return -1;
+	  }
+
+	  return 1;
+	}
+
+	function getBearing(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return 0;
+	  } else if (isObjectNotArray(options)) {
+	    var bearing = options.bearing;
+	    return bearing === undefined ? 0 : bearing;
+	  }
+
+	  return 0;
+	}
+
+	function isObjectNotArray(argument) {
+	  return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
+	}
+
+	function isUndefinedOrNull(argument) {
+	  return argument === null || argument === undefined;
+	}
+
+	var $$m = _export;
+
+	// `Number.EPSILON` constant
+	// https://tc39.es/ecma262/#sec-number.epsilon
+	$$m({ target: 'Number', stat: true }, {
+	  EPSILON: Math.pow(2, -52)
+	});
+
+	var uncurryThis$8 = functionUncurryThis;
+	var requireObjectCoercible$4 = requireObjectCoercible$e;
+	var toString$5 = toString$k;
+
+	var quot = /"/g;
+	var replace$2 = uncurryThis$8(''.replace);
+
+	// `CreateHTML` abstract operation
+	// https://tc39.es/ecma262/#sec-createhtml
+	var createHtml = function (string, tag, attribute, value) {
+	  var S = toString$5(requireObjectCoercible$4(string));
+	  var p1 = '<' + tag;
+	  if (attribute !== '') p1 += ' ' + attribute + '="' + replace$2(toString$5(value), quot, '&quot;') + '"';
+	  return p1 + '>' + S + '</' + tag + '>';
+	};
+
+	var fails$6 = fails$V;
+
+	// 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 $$l = _export;
+	var createHTML = createHtml;
+	var forcedStringHTMLMethod = stringHtmlForced;
+
+	// `String.prototype.link` method
+	// https://tc39.es/ecma262/#sec-string.prototype.link
+	$$l({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {
+	  link: function link(url) {
+	    return createHTML(this, 'a', 'href', url);
+	  }
+	});
+
+	/**
+	 * splaytree v3.1.0
+	 * Fast Splay tree for Node and browser
+	 *
+	 * @author Alexander Milevski <info@w8r.name>
+	 * @license MIT
+	 * @preserve
+	 */
+	var Node =
+	/** @class */
+	function () {
+	  function Node(key, data) {
+	    this.next = null;
+	    this.key = key;
+	    this.data = data;
+	    this.left = null;
+	    this.right = null;
+	  }
+
+	  return Node;
+	}();
+	/* follows "An implementation of top-down splaying"
+	 * by D. Sleator <sleator@cs.cmu.edu> March 1992
+	 */
+
+
+	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.
+	 */
+
+
+	function splay(i, t, comparator) {
+	  var N = new Node(null, null);
+	  var l = N;
+	  var r = N;
+
+	  while (true) {
+	    var cmp = comparator(i, t.key); //if (i < t.key) {
+
+	    if (cmp < 0) {
+	      if (t.left === null) break; //if (i < t.left.key) {
+
+	      if (comparator(i, t.left.key) < 0) {
+	        var y = t.left;
+	        /* rotate right */
+
+	        t.left = y.right;
+	        y.right = t;
+	        t = y;
+	        if (t.left === null) break;
+	      }
+
+	      r.left = t;
+	      /* link right */
+
+	      r = t;
+	      t = t.left; //} else if (i > t.key) {
+	    } else if (cmp > 0) {
+	      if (t.right === null) break; //if (i > t.right.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 */
+
+
+	  l.right = t.left;
+	  r.left = t.right;
+	  t.left = N.right;
+	  t.right = N.left;
+	  return t;
+	}
+
+	function insert(i, data, t, comparator) {
+	  var node = new Node(i, data);
+
+	  if (t === null) {
+	    node.left = node.right = null;
+	    return node;
+	  }
+
+	  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 node;
+	}
+
+	function split$2(key, v, comparator) {
+	  var left = null;
+	  var right = null;
+
+	  if (v) {
+	    v = splay(key, v, comparator);
+	    var cmp = comparator(v.key, key);
+
+	    if (cmp === 0) {
+	      left = v.left;
+	      right = v.right;
+	    } else if (cmp < 0) {
+	      right = v.right;
+	      v.right = null;
+	      left = v;
+	    } else {
+	      left = v.left;
+	      v.left = null;
+	      right = v;
+	    }
+	  }
+
+	  return {
+	    left: left,
+	    right: right
+	  };
+	}
+
+	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 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 Tree =
+	/** @class */
+	function () {
+	  function Tree(comparator) {
+	    if (comparator === void 0) {
+	      comparator = DEFAULT_COMPARE;
+	    }
+
+	    this._root = null;
+	    this._size = 0;
+	    this._comparator = comparator;
+	  }
+	  /**
+	   * Inserts a key, allows duplicates
+	   */
+
+
+	  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
+	   */
+
+
+	  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;
+	      }
+
+	      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
+	   */
+
+
+	  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 {
+	        x = splay(i, t.left, comparator);
+	        x.right = t.right;
+	      }
+
+	      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;
+
+	    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 {
+	        key: node.key,
+	        data: node.data
+	      };
+	    }
+
+	    return null;
+	  };
+	  /**
+	   * Find without splaying
+	   */
+
+
+	  Tree.prototype.findStatic = function (key) {
+	    var current = this._root;
+	    var compare = this._comparator;
+
+	    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;
+	  };
+
+	  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;
+	  };
+
+	  Tree.prototype.contains = function (key) {
+	    var current = this._root;
+	    var compare = this._comparator;
+
+	    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;
+	  };
+
+	  Tree.prototype.forEach = function (visitor, ctx) {
+	    var current = this._root;
+	    var Q = [];
+	    /* Initialize stack s */
+
+	    var done = false;
+
+	    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;
+	      }
+	    }
+
+	    return this;
+	  };
+	  /**
+	   * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+	   */
+
+
+	  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
+	        }
+
+	        node = node.right;
+	      }
+	    }
+
+	    return this;
+	  };
+	  /**
+	   * Returns array of keys
+	   */
+
+
+	  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
+	   */
+
+
+	  Tree.prototype.values = function () {
+	    var values = [];
+	    this.forEach(function (_a) {
+	      var data = _a.data;
+	      return values.push(data);
+	    });
+	    return values;
+	  };
+
+	  Tree.prototype.min = function () {
+	    if (this._root) return this.minNode(this._root).key;
+	    return null;
+	  };
+
+	  Tree.prototype.max = function () {
+	    if (this._root) return this.maxNode(this._root).key;
+	    return null;
+	  };
+
+	  Tree.prototype.minNode = function (t) {
+	    if (t === void 0) {
+	      t = this._root;
+	    }
+
+	    if (t) while (t.left) {
+	      t = t.left;
+	    }
+	    return t;
+	  };
+
+	  Tree.prototype.maxNode = function (t) {
+	    if (t === void 0) {
+	      t = this._root;
+	    }
+
+	    if (t) while (t.right) {
+	      t = t.right;
+	    }
+	    return t;
+	  };
+	  /**
+	   * Returns node at given index
+	   */
+
+
+	  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;
+	  };
+
+	  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 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;
+	  };
+
+	  Tree.prototype.prev = function (d) {
+	    var root = this._root;
+	    var predecessor = null;
+
+	    if (d.left !== null) {
+	      predecessor = d.left;
+
+	      while (predecessor.right) {
+	        predecessor = predecessor.right;
+	      }
+
+	      return predecessor;
+	    }
+
+	    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;
+	      }
+	    }
+
+	    return predecessor;
+	  };
+
+	  Tree.prototype.clear = function () {
+	    this._root = null;
+	    this._size = 0;
+	    return this;
+	  };
+
+	  Tree.prototype.toList = function () {
+	    return toList(this._root);
+	  };
+	  /**
+	   * Bulk-load items. Both array have to be same size
+	   */
+
+
+	  Tree.prototype.load = function (keys, values, presort) {
+	    if (values === void 0) {
+	      values = [];
+	    }
+
+	    if (presort === void 0) {
+	      presort = false;
+	    }
+
+	    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;
+	  };
+
+	  Tree.prototype.isEmpty = function () {
+	    return this._root === null;
+	  };
+
+	  Object.defineProperty(Tree.prototype, "size", {
+	    get: function get() {
+	      return this._size;
 	    },
-	    "\u0644\u0625": {
-	      "isolated": "\uFEF9",
-	      "final": "\uFEFA"
+	    enumerable: true,
+	    configurable: true
+	  });
+	  Object.defineProperty(Tree.prototype, "root", {
+	    get: function get() {
+	      return this._root;
 	    },
-	    "\u0644\u0627": {
-	      "isolated": "\uFEFB",
-	      "final": "\uFEFC"
+	    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('');
+	  };
+
+	  Tree.prototype.update = function (key, newKey, newData) {
+	    var comparator = this._comparator;
+
+	    var _a = split$2(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$2(key, this._root, this._comparator);
+	  };
+
+	  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;
+	    }
+
+	    p = p.next;
+	  }
+
+	  if (p1 !== null) {
+	    p.next = p1;
+	  } else if (p2 !== null) {
+	    p.next = p2;
+	  }
+
+	  return head.next;
+	}
+
+	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;
+
+	  while (true) {
+	    do {
+	      i++;
+	    } while (compare(keys[i], pivot) < 0);
+
+	    do {
+	      j--;
+	    } while (compare(keys[j], pivot) > 0);
+
+	    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;
+	  }
+
+	  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");
+	  }
+	}
+
+	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;
+	}
+	/**
+	 * A bounding box has the format:
+	 *
+	 *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
+	 *
+	 */
+
+
+	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 */
+
+
+	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
+
+	  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
+
+	  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
+
+	  return {
+	    ll: {
+	      x: lowerX,
+	      y: lowerY
 	    },
-	    "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;
+	    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
+	 */
+
+
+	var epsilon = Number.EPSILON; // IE Polyfill
+
+	if (epsilon === undefined) epsilon = Math.pow(2, -52);
+	var EPSILON_SQ = epsilon * epsilon;
+	/* FLP comparator */
+
+	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
+
+
+	  var ab = a - b;
+
+	  if (ab * ab < EPSILON_SQ * a * b) {
+	    return 0;
+	  } // normal comparison
+
+
+	  return a < b ? -1 : 1;
+	};
+	/**
+	 * 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.
+	 */
+
+
+	var PtRounder = /*#__PURE__*/function () {
+	  function PtRounder() {
+	    _classCallCheck(this, PtRounder);
+
+	    this.reset();
+	  }
+
+	  _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)
+	      };
+	    }
+	  }]);
+
+	  return PtRounder;
+	}();
+
+	var CoordRounder = /*#__PURE__*/function () {
+	  function CoordRounder() {
+	    _classCallCheck(this, CoordRounder);
+
+	    this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
+
+	    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).
+
+
+	  _createClass(CoordRounder, [{
+	    key: "round",
+	    value: function round(coord) {
+	      var node = this.tree.add(coord);
+	      var prevNode = this.tree.prev(node);
+
+	      if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return prevNode.key;
+	      }
+
+	      var nextNode = this.tree.next(node);
+
+	      if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return nextNode.key;
+	      }
+
+	      return coord;
+	    }
+	  }]);
+
+	  return CoordRounder;
+	}(); // singleton available by import
+
+
+	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);
+	};
+
+	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 */
+
+
+	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. */
+
+
+	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. */
+
+
+	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
+	  };
+	};
+
+	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
+
+	      if (a.point !== b.point) a.link(b); // favor right events over left
+
+	      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
+
+	      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');
+	      }
+
+	      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;
+	      }
+
+	      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);
+	        }
+	      }
+	    }
+	  }, {
+	    key: "getAvailableLinkedEvents",
+	    value: function getAvailableLinkedEvents() {
+	      // point.events is always of length 2 or greater
+	      var events = [];
+
+	      for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
+	        var evt = this.point.events[i];
+
+	        if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+	          events.push(evt);
+	        }
+	      }
+
+	      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.
+	     */
+
+	  }, {
+	    key: "getLeftmostComparator",
+	    value: function getLeftmostComparator(baseEvent) {
+	      var _this = this;
+
+	      var cache = new Map();
+
+	      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)
+	        });
+	      };
+
+	      return function (a, b) {
+	        if (!cache.has(a)) fillCache(a);
+	        if (!cache.has(b)) fillCache(b);
+
+	        var _cache$get = cache.get(a),
+	            asine = _cache$get.sine,
+	            acosine = _cache$get.cosine;
+
+	        var _cache$get2 = cache.get(b),
+	            bsine = _cache$get2.sine,
+	            bcosine = _cache$get2.cosine; // both on or above x-axis
+
+
+	        if (asine >= 0 && bsine >= 0) {
+	          if (acosine < bcosine) return 1;
+	          if (acosine > bcosine) return -1;
+	          return 0;
+	        } // both below x-axis
+
+
+	        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 SweepEvent;
+	}(); // segments and sweep events when all else is identical
+
+
+	var segmentId = 0;
+
+	var Segment = /*#__PURE__*/function () {
+	  _createClass(Segment, null, [{
+	    key: "compare",
+
+	    /* 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?)
+
+	        return -1;
+	      } // is left endpoint of segment A the right-more?
+
+
+	      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?
+
+	        var bCmpALeft = b.comparePoint(a.leftSE.point);
+	        if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
+
+	        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?)
+
+	        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
+
+
+	      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 (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;
+	      }
+
+	      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
+
+
+	      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
+
+	      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
+
+	      if (a.id < b.id) return -1;
+	      if (a.id > b.id) return 1; // identical segment, ie a === b
+
+	      return 0;
+	    }
+	    /* Warning: a reference to ringWindings input will be stored,
+	     *  and possibly will be later modified */
+
+	  }]);
+
+	  function Segment(leftSE, rightSE, rings, windings) {
+	    _classCallCheck(this, Segment);
+
+	    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
+	  }
+
+	  _createClass(Segment, [{
+	    key: "replaceRightSE",
+
+	    /* 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;
+	    }
+	  }, {
+	    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 */
+
+	  }, {
+	    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)
+	     */
+
+	  }, {
+	    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.
+	     */
+
+	  }, {
+	    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
+
+	        return null;
+	      } // does this left endpoint matches (other doesn't)
+
+
+	      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 tlp;
+	      } // does other left endpoint matches (this doesn't)
+
+
+	      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
+
+
+	        return olp;
+	      } // trivial intersection on right endpoints
+
+
+	      if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
+
+	      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
+
+	      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
+
+	      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);
+	    }
+	    /**
+	     * 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
+	     */
+
+	  }, {
+	    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();
+	      }
+
+	      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
+
+
+	      if (alreadyLinked) {
+	        newLeftSE.checkForConsuming();
+	        newRightSE.checkForConsuming();
+	      }
+
+	      return newEvents;
+	    }
+	    /* Swap which event is left and right */
+
+	  }, {
+	    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 */
+
+	  }, {
+	    key: "consume",
+	    value: function consume(other) {
+	      var consumer = this;
+	      var consumee = other;
+
+	      while (consumer.consumedBy) {
+	        consumer = consumer.consumedBy;
+	      }
+
+	      while (consumee.consumedBy) {
+	        consumee = consumee.consumedBy;
+	      }
+
+	      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
+
+	      if (cmp > 0) {
+	        var tmp = consumer;
+	        consumer = consumee;
+	        consumee = tmp;
+	      } // make sure a segment doesn't consume it's prev
+
+
+	      if (consumer.prev === consumee) {
+	        var _tmp = consumer;
+	        consumer = consumee;
+	        consumee = _tmp;
+	      }
+
+	      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);
+
+	        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;
+	    }
+	    /* The first segment previous segment chain that is in the result */
+
+	  }, {
+	    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
+
+	      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);
+
+	        if (index === -1) {
+	          ringsAfter.push(ring);
+	          windingsAfter.push(winding);
+	        } else windingsAfter[index] += winding;
+	      } // calcualte polysAfter
+
+
+	      var polysAfter = [];
+	      var polysExclude = [];
+
+	      for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+	        if (windingsAfter[_i] === 0) continue; // non-zero rule
+
+	        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);
+
+	          var _index = polysAfter.indexOf(_ring.poly);
+
+	          if (_index !== -1) polysAfter.splice(_index, 1);
+	        }
+	      } // calculate multiPolysAfter
+
+
+	      for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+	        var mp = polysAfter[_i2].multiPoly;
+	        if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
+	      }
+
+	      return this._afterState;
+	    }
+	    /* Is this segment part of the final result? */
+
+	  }, {
+	    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;
+	    }
+	  }], [{
+	    key: "fromRing",
+	    value: function fromRing(pt1, pt2, ring) {
+	      var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
+
+	      var cmpPts = SweepEvent.comparePoints(pt1, pt2);
+
+	      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, "]"));
+
+	      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 (!Array.isArray(geomRing) || geomRing.length === 0) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
+
+	    this.poly = poly;
+	    this.isExterior = isExterior;
+	    this.segments = [];
+
+	    if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
+
+	    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;
+
+	    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 point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
+
+	      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);
+	      }
+
+	      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
+
+	    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 = [];
+
+	    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);
+	    }
+
+	    this.multiPoly = multiPoly;
+	  }
+
+	  _createClass(PolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = this.exteriorRing.getSweepEvents();
+
+	      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 sweepEvents;
+	    }
+	  }]);
+
+	  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);
+	    }
+
+	    this.isSubject = isSubject;
+	  }
+
+	  _createClass(MultiPolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
+
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polySweepEvents = this.polys[i].getSweepEvents();
+
+	        for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(polySweepEvents[j]);
+	        }
+	      }
+
+	      return sweepEvents;
+	    }
+	  }]);
+
+	  return MultiPolyIn;
+	}();
+
+	var RingOut = /*#__PURE__*/function () {
+	  _createClass(RingOut, null, [{
+	    key: "factory",
+
+	    /* 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 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 */
+
+	        while (true) {
+	          prevEvent = event;
+	          event = nextEvent;
+	          events.push(event);
+	          /* Is the ring complete? */
+
+	          if (event.point === startingPoint) break;
+
+	          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. */
+
+	            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 */
+
+
+	            if (availableLEs.length === 1) {
+	              nextEvent = availableLEs[0].otherSE;
+	              break;
+	            }
+	            /* We must have an intersection. Check for a completed loop */
+
+
+	            var indexLE = null;
+
+	            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 */
+
+
+	            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 */
+
+
+	            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 RingOut(events) {
+	    _classCallCheck(this, RingOut);
+
+	    this.events = events;
+
+	    for (var i = 0, iMax = events.length; i < iMax; i++) {
+	      events[i].segment.ringOut = this;
+	    }
+
+	    this.poly = null;
+	  }
+
+	  _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];
+
+	      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
+
+
+	      if (points.length === 1) return null; // check if the starting point is necessary
+
+	      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;
+	      }
+
+	      return this._isExteriorRing;
+	    }
+	  }, {
+	    key: "enclosingRing",
+	    value: function enclosingRing() {
+	      if (this._enclosingRing === undefined) {
+	        this._enclosingRing = this._calcEnclosingRing();
+	      }
+
+	      return this._enclosingRing;
+	    }
+	    /* Returns the ring that encloses this one, if any */
+
+	  }, {
+	    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 prevSeg = leftMostEvt.segment.prevInResult();
+	      var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+
+	      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
+
+	        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
+
+	        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
+
+
+	        prevSeg = prevPrevSeg.prevInResult();
+	        prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+	      }
+	    }
+	  }]);
+
+	  return RingOut;
+	}();
+
+	var PolyOut = /*#__PURE__*/function () {
+	  function PolyOut(exteriorRing) {
+	    _classCallCheck(this, PolyOut);
+
+	    this.exteriorRing = exteriorRing;
+	    exteriorRing.poly = this;
+	    this.interiorRings = [];
+	  }
+
+	  _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
+
+	      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;
+	    }
+	  }]);
+
+	  return PolyOut;
+	}();
+
+	var MultiPolyOut = /*#__PURE__*/function () {
+	  function MultiPolyOut(rings) {
+	    _classCallCheck(this, MultiPolyOut);
+
+	    this.rings = rings;
+	    this.polys = this._composePolys(rings);
+	  }
+
+	  _createClass(MultiPolyOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [];
+
+	      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
+
+	        if (polyGeom === null) continue;
+	        geom.push(polyGeom);
+	      }
+
+	      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);
+	        }
+	      }
+
+	      return polys;
+	    }
+	  }]);
+
+	  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 SweepLine = /*#__PURE__*/function () {
+	  function SweepLine(queue) {
+	    var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
+
+	    _classCallCheck(this, SweepLine);
+
+	    this.queue = queue;
+	    this.tree = new Tree(comparator);
+	    this.segments = [];
+	  }
+
+	  _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
+
+	      if (event.consumedBy) {
+	        if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+	        return newEvents;
+	      }
+
+	      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
+
+	      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
+
+
+	      while (nextSeg === undefined) {
+	        nextNode = this.tree.next(nextNode);
+	        if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+	      }
+
+	      if (event.isLeft) {
+	        // Check for intersections against the previous segment in the sweep line
+	        var prevMySplitter = null;
+
+	        if (prevSeg) {
+	          var prevInter = prevSeg.getIntersection(segment);
+
+	          if (prevInter !== null) {
+	            if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
+
+	            if (!prevSeg.isAnEndpoint(prevInter)) {
+	              var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
+
+	              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
+
+
+	        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]);
+	              }
+	            }
+	          }
+	        }
+
+	        this.tree.remove(segment);
+	      }
+
+	      return newEvents;
+	    }
+	    /* Safely split a segment that is currently in the datastructures
+	     * IE - a segment other than the one that is currently being processed. */
+
+	  }, {
+	    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
+
+	      if (seg.consumedBy === undefined) this.tree.insert(seg);
+	      return newEvents;
+	    }
+	  }]);
+
+	  return SweepLine;
+	}();
+
+	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;
+
+	var Operation = /*#__PURE__*/function () {
+	  function Operation() {
+	    _classCallCheck(this, Operation);
+	  }
+
+	  _createClass(Operation, [{
+	    key: "run",
+	    value: function run(type, geom, moreGeoms) {
+	      operation.type = type;
+	      rounder.reset();
+	      /* Convert inputs to MultiPoly objects */
+
+	      var multipolys = [new MultiPolyIn(geom, true)];
+
+	      for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
+	        multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+	      }
+
+	      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. */
+
+	      if (operation.type === 'difference') {
+	        // in place removal
+	        var subject = multipolys[0];
+	        var _i = 1;
+
+	        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. */
+
+
+	      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];
+
+	          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 */
+
+
+	      var queue = new Tree(SweepEvent.compare);
+
+	      for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+	        var sweepEvents = multipolys[_i3].getSweepEvents();
+
+	        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 */
+
+
+	      var sweepLine = new SweepLine(queue);
+	      var prevQueueSize = queue.size;
+	      var node = queue.pop();
+
+	      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.');
+	        }
+
+	        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.');
+	        }
+
+	        var newEvents = sweepLine.process(evt);
+
+	        for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+	          var _evt = newEvents[_i4];
+	          if (_evt.consumedBy === undefined) queue.insert(_evt);
+	        }
+
+	        prevQueueSize = queue.size;
+	        node = queue.pop();
+	      } // free some memory we don't need anymore
+
+
+	      rounder.reset();
+	      /* Collect and compile segments we're keeping into a multipolygon */
+
+	      var ringsOut = RingOut.factory(sweepLine.segments);
+	      var result = new MultiPolyOut(ringsOut);
+	      return result.getGeom();
+	    }
+	  }]);
+
+	  return Operation;
+	}(); // singleton available by import
+
+
+	var operation = new Operation();
+
+	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];
+	  }
+
+	  return operation.run('union', geom, moreGeoms);
+	};
+
+	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];
+	  }
+
+	  return operation.run('intersection', geom, moreGeoms);
+	};
+
+	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];
+	  }
+
+	  return operation.run('xor', geom, moreGeoms);
+	};
+
+	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];
+	  }
+
+	  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 1 * e.toFixed(extrasPrecision);
+	        }
+	      });
+	    }
+
+	    function multi(l) {
+	      return l.map(point);
+	    }
+
+	    function poly(p) {
+	      return p.map(multi);
+	    }
+
+	    function multiPoly(m) {
+	      return m.map(poly);
+	    }
+
+	    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 {};
+	      }
+	    }
+
+	    function feature(obj) {
+	      obj.geometry = geometry(obj.geometry);
+	      return obj;
+	    }
+
+	    function featureCollection(f) {
+	      f.features = f.features.map(feature);
+	      return f;
+	    }
+
+	    function geometryCollection(g) {
+	      g.geometries = g.geometries.map(geometry);
+	      return g;
+	    }
+
+	    if (!t) {
+	      return t;
+	    }
+
+	    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;
+	    }
+	  }
+
+	  geojsonPrecision.exports = parse;
+	  geojsonPrecision.exports.parse = parse;
+	})();
+
+	var precision = geojsonPrecision.exports;
+
+	var $$k = _export;
+	var fails$5 = fails$V;
+	var toObject$1 = toObject$i;
+	var toPrimitive = toPrimitive$3;
+
+	var FORCED$5 = fails$5(function () {
+	  return new Date(NaN).toJSON() !== null
+	    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+	});
+
+	// `Date.prototype.toJSON` method
+	// https://tc39.es/ecma262/#sec-date.prototype.tojson
+	$$k({ target: 'Date', proto: true, forced: FORCED$5 }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  toJSON: function toJSON(key) {
+	    var O = toObject$1(this);
+	    var pv = toPrimitive(O, 'number');
+	    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+	  }
+	});
+
+	var $$j = _export;
+	var call = functionCall;
+
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	$$j({ target: 'URL', proto: true, enumerable: true }, {
+	  toJSON: function toJSON() {
+	    return call(URL.prototype.toString, 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);
+	    });
+	  }
+	}
+
+	function getTreeDepth(obj) {
+	  var depth = 0;
+
+	  if (Array.isArray(obj) || isObject$3(obj)) {
+	    forEach(obj, function (val) {
+	      if (Array.isArray(val) || isObject$3(val)) {
+	        var tmpDepth = getTreeDepth(val);
+
+	        if (tmpDepth > depth) {
+	          depth = tmpDepth;
+	        }
+	      }
+	    });
+	    return depth + 1;
+	  }
+
+	  return depth;
+	}
+
+	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);
+
+	    if (string === undefined) {
+	      return string;
+	    }
+
+	    var length = maxLength - currentIndent.length - reserved;
+	    var treeDepth = getTreeDepth(obj);
+
+	    if (treeDepth <= maxNesting && string.length <= length) {
+	      var prettified = prettify(string, {
+	        addMargin: addMargin,
+	        addArrayMargin: addArrayMargin,
+	        addObjectMargin: addObjectMargin
+	      });
+
+	      if (prettified.length <= length) {
+	        return prettified;
+	      }
+	    }
+
+	    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;
+	      };
+
+	      if (Array.isArray(obj)) {
+	        for (var index = 0; index < obj.length; index++) {
+	          items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
+	        }
+
+	        delimiters = '[]';
+	      } else {
+	        Object.keys(obj).forEach(function (key, index, array) {
+	          var keyPart = JSON.stringify(key) + ': ';
+
+	          var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
+
+	          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);
+	      }
+	    }
+
+	    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 stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
+
+	function prettify(string, options) {
+	  options = options || {};
+	  var tokens = {
+	    '{': '{',
+	    '}': '}',
+	    '[': '[',
+	    ']': ']',
+	    ',': ', ',
+	    ':': ': '
+	  };
+
+	  if (options.addMargin || options.addObjectMargin) {
+	    tokens['{'] = '{ ';
+	    tokens['}'] = ' }';
+	  }
+
+	  if (options.addMargin || options.addArrayMargin) {
+	    tokens['['] = '[ ';
+	    tokens[']'] = ' ]';
+	  }
+
+	  return string.replace(stringOrChar, function (match, string) {
+	    return string ? match : tokens[match];
+	  });
+	}
+
+	function get(options, name, defaultValue) {
+	  return name in options ? options[name] : defaultValue;
+	}
+
+	var jsonStringifyPrettyCompact = stringify;
+
+	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;
+
+	    _classCallCheck$1(this, _default);
+
+	    // The _cache retains resolved features, so if you ask for the same thing multiple times
+	    // we don't repeat the expensive resolving/clipping operations.
+	    //
+	    // Each feature has a stable identifier that is used as the cache key.
+	    // The identifiers look like:
+	    // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
+	    // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
+	    // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
+	    // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
+	    this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
+	    // When strict mode = false, return `null` for invalid locations or locationSets.
+
+	    this._strict = true; // process input FeatureCollection
+
+	    if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+	      fc.features.forEach(function (feature) {
+	        feature.properties = feature.properties || {};
+	        var props = feature.properties; // Get `id` from either `id` or `properties`
+
+	        var id = feature.id || props.id;
+	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
+
+	        id = id.toLowerCase();
+	        feature.id = id;
+	        props.id = id; // Ensure `area` property exists
+
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+
+	          props.area = Number(area.toFixed(2));
+	        }
+
+	        _this._cache[id] = feature;
+	      });
+	    } // Replace CountryCoder world geometry to be a polygon covering the world.
+
+
+	    var world = _cloneDeep(feature$1('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;
+	  } // 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
+	  //
+
+
+	  _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();
+
+	        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
+	          };
+	        }
+	      }
+
+	      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
+	    //
+
+	  }, {
+	    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?
+
+
+	      if (valid.type === 'point') {
+	        var lon = location[0];
+	        var lat = location[1];
+	        var radius = location[2] || 25; // km
+
+	        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
+	        });
+	      }
+
+	      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
+	    //
+
+	  }, {
+	    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(',') + ']';
+	      }
+
+	      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
+	    //
+
+	  }, {
+	    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..
+
+	      if (includes.length === 1 && excludes.length === 0) {
+	        return Object.assign(valid, {
+	          feature: includes[0].feature
+	        });
+	      } // Calculate unions
+
+
+	      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
+
+
+	      var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
+	      var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
+
+	      resultGeoJSON.id = id;
+	      resultGeoJSON.properties = {
+	        id: id,
+	        area: Number(area.toFixed(2))
+	      };
+	      this._cache[id] = resultGeoJSON;
+	      return Object.assign(valid, {
+	        feature: resultGeoJSON
+	      });
+	    } // strict
+	    //
+
+	  }, {
+	    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
+
+	  }, {
+	    key: "cache",
+	    value: function cache() {
+	      return this._cache;
+	    } // stringify
+	    // convenience method to prettyStringify the given object
+
+	  }, {
+	    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?
+
+	  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';
+	  }
+	}
+
+	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 _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 $$i = _export;
+
+	// `Number.MAX_SAFE_INTEGER` constant
+	// https://tc39.es/ecma262/#sec-number.max_safe_integer
+	$$i({ target: 'Number', stat: true }, {
+	  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+	});
+
+	var aesJs = {exports: {}};
+
+	(function (module, exports) {
+	  (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 AES(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 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);
+	    };
+
+	    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 ModeOfOperationCBC(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 ModeOfOperationCFB(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 ModeOfOperationOFB(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 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
+
+
+	      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 ModeOfOperationCTR(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
+	    }
+	  })();
+	})(aesJs);
+
+	var aesjs = aesJs.exports;
+
+	// 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;
+	  }
+	}
+
+	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]) // 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;
+	}
+
+	// Like selection.property('value', ...), but avoids no-op value sets,
+	// which can result in layout/repaint thrashing in some situations.
+
+	/** @returns {string} */
+	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 || 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 (arguments.length === 1) {
+	    return selection.property('value');
+	  }
+
+	  return selection.each(d3_selection_value(value));
+	}
+
+	function utilKeybinding(namespace) {
+	  var _keybindings = {};
+
+	  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;
+	      }
+	    }
+
+	    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 {
+	          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;
+	      }
+
+	      if (!isMatch) return false; // test modifier keys
+
+	      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;
+	      }
+
+	      if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+	      if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+	      return true;
+	    }
+	  }
+
+	  function capture(d3_event) {
+	    testBindings(d3_event, true);
+	  }
+
+	  function bubble(d3_event) {
+	    var tagName = select(d3_event.target).node().tagName;
+
+	    if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+	      return;
+	    }
+
+	    testBindings(d3_event, 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.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
+	    }
+
+	    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 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 _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
+	//
+
+	function coreLocations() {
+	  var _this = {};
+	  var _resolvedFeatures = {}; // cache of *resolved* locationSet features
+
+	  var _loco = new _default(); // instance of a location-conflation resolver
+
+
+	  var _wp; // instance of a which-polygon index
+	  // pre-resolve the worldwide locationSet
+
+
+	  var world = {
+	    locationSet: {
+	      include: ['Q2']
+	    }
+	  };
+	  resolveLocationSet(world);
+	  rebuildIndex();
+	  var _queue = [];
+
+	  var _deferred = new Set();
+
+	  var _inProcess; // Returns a Promise to process the queue
+
+
+	  function processQueue() {
+	    if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);
+
+	    var chunk = _queue.pop();
+
+	    return new Promise(function (resolvePromise) {
+	      var handle = window.requestIdleCallback(function () {
+	        _deferred["delete"](handle); // const t0 = performance.now();
+
+
+	        chunk.forEach(resolveLocationSet); // const t1 = performance.now();
+	        // console.log('chunk processed in ' + (t1 - t0) + ' ms');
+
+	        resolvePromise();
+	      });
+
+	      _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.
+
+
+	  function resolveLocationSet(obj) {
+	    if (obj.locationSetID) return; // work was done already
+
+	    try {
+	      var locationSet = obj.locationSet;
+
+	      if (!locationSet) {
+	        throw new Error('object missing locationSet property');
+	      }
+
+	      if (!locationSet.include) {
+	        // missing `include`, default to worldwide include
+	        locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
+	      }
+
+	      var resolved = _loco.resolveLocationSet(locationSet);
+
+	      var locationSetID = resolved.id;
+	      obj.locationSetID = locationSetID;
+
+	      if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
+	        throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
+	      }
+
+	      if (!_resolvedFeatures[locationSetID]) {
+	        // First time seeing this locationSet feature
+	        var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone
+
+	        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
+
+	      obj.locationSetID = '+[Q2]';
+	    }
+	  } // Rebuilds the whichPolygon index with whatever features have been resolved.
+
+
+	  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": { … }
+	  //      }
+	  //    ]
+	  //  }
+	  //
+
+
+	  _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`
+
+	        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
+
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+
+	          props.area = Number(area.toFixed(2));
+	        }
+
+	        _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.
+	  //
+
+
+	  _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
+
+	    _queue = _queue.concat(utilArrayChunk(objects, 200));
+
+	    if (!_inProcess) {
+	      _inProcess = processQueue().then(function () {
+	        rebuildIndex();
+	        _inProcess = null;
+	        return objects;
+	      });
+	    }
+
+	    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]`
+	  //
+
+
+	  _this.locationSetID = function (locationSet) {
+	    var locationSetID;
+
+	    try {
+	      locationSetID = _loco.validateLocationSet(locationSet).id;
+	    } catch (err) {
+	      locationSetID = '+[Q2]'; // the world
+	    }
+
+	    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,
+	  //     …
+	  //   }
+	  //
+
+
+	  _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`
+	  //
+
+
+	  _this.query = function (loc, multi) {
+	    return _wp(loc, multi);
+	  }; // Direct access to the location-conflation resolver
+
+
+	  _this.loco = function () {
+	    return _loco;
+	  }; // Direct access to the which-polygon index
+
+
+	  _this.wp = function () {
+	    return _wp;
+	  };
+
+	  return _this;
+	}
+
+	var $$h = _export;
+	var $findIndex = arrayIteration.findIndex;
+	var addToUnscopables$1 = addToUnscopables$6;
+
+	var FIND_INDEX = 'findIndex';
+	var SKIPS_HOLES = true;
+
+	// Shouldn't skip holes
+	if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
+
+	// `Array.prototype.findIndex` method
+	// https://tc39.es/ecma262/#sec-array.prototype.findindex
+	$$h({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+	  findIndex: function findIndex(callbackfn /* , that = undefined */) {
+	    return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$1(FIND_INDEX);
+
+	var global$5 = global$1o;
+	var isRegExp = isRegexp;
+
+	var TypeError$3 = global$5.TypeError;
+
+	var notARegexp = function (it) {
+	  if (isRegExp(it)) {
+	    throw TypeError$3("The method doesn't accept regular expressions");
+	  } return it;
+	};
+
+	var wellKnownSymbol = wellKnownSymbol$t;
+
+	var MATCH = wellKnownSymbol('match');
+
+	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;
+	};
+
+	var $$g = _export;
+	var uncurryThis$7 = functionUncurryThis;
+	var notARegExp$2 = notARegexp;
+	var requireObjectCoercible$3 = requireObjectCoercible$e;
+	var toString$4 = toString$k;
+	var correctIsRegExpLogic$2 = correctIsRegexpLogic;
+
+	var stringIndexOf = uncurryThis$7(''.indexOf);
+
+	// `String.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-string.prototype.includes
+	$$g({ target: 'String', proto: true, forced: !correctIsRegExpLogic$2('includes') }, {
+	  includes: function includes(searchString /* , position = 0 */) {
+	    return !!~stringIndexOf(
+	      toString$4(requireObjectCoercible$3(this)),
+	      toString$4(notARegExp$2(searchString)),
+	      arguments.length > 1 ? arguments[1] : undefined
+	    );
+	  }
 	});
 
-	var reference = createCommonjsModule(function (module, exports) {
+	/** Detect free variable `global` from Node.js. */
+	var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
+
+	/** 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. */
+
+	var root = freeGlobal || freeSelf || Function('return this')();
+
+	/** Built-in value references. */
+
+	var _Symbol = root.Symbol;
+
+	/** Used for built-in method references. */
+
+	var objectProto$1 = Object.prototype;
+	/** Used to check objects for own properties. */
+
+	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.
+	 */
+
+	var nativeObjectToString$1 = objectProto$1.toString;
+	/** Built-in value references. */
+
+	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`.
+	 */
+
+	function getRawTag(value) {
+	  var isOwn = hasOwnProperty$2.call(value, symToStringTag$1),
+	      tag = value[symToStringTag$1];
+
+	  try {
+	    value[symToStringTag$1] = undefined;
+	    var unmasked = true;
+	  } catch (e) {}
+
+	  var result = nativeObjectToString$1.call(value);
+
+	  if (unmasked) {
+	    if (isOwn) {
+	      value[symToStringTag$1] = tag;
+	    } else {
+	      delete value[symToStringTag$1];
+	    }
+	  }
+
+	  return result;
+	}
+
+	/** 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.
+	 */
+
+	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.
+	 */
+
+	function objectToString(value) {
+	  return nativeObjectToString.call(value);
+	}
+
+	/** `Object#toString` result references. */
+
+	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`.
+	 */
+
+	function baseGetTag(value) {
+	  if (value == null) {
+	    return value === undefined ? undefinedTag : nullTag;
+	  }
+
+	  return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+	}
+
+	/**
+	 * 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';
+	}
+
+	/** `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(value) {
+	  return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	}
+
+	/**
+	 * A specialized version of `_.map` for arrays without support for iteratee
+	 * shorthands.
+	 *
+	 * @private
+	 * @param {Array} [array] The array to iterate over.
+	 * @param {Function} iteratee The function invoked per iteration.
+	 * @returns {Array} Returns the new mapped array.
+	 */
+	function arrayMap(array, iteratee) {
+	  var index = -1,
+	      length = array == null ? 0 : array.length,
+	      result = Array(length);
+
+	  while (++index < length) {
+	    result[index] = iteratee(array[index], index, array);
+	  }
+
+	  return result;
+	}
+
+	/**
+	 * Checks if `value` is classified as an `Array` object.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+	 * @example
+	 *
+	 * _.isArray([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isArray(document.body.children);
+	 * // => false
+	 *
+	 * _.isArray('abc');
+	 * // => false
+	 *
+	 * _.isArray(_.noop);
+	 * // => false
+	 */
+	var isArray$1 = Array.isArray;
+
+	/** Used as references for various `Number` constants. */
+
+	var INFINITY = 1 / 0;
+	/** Used to convert symbols to primitives and strings. */
+
+	var symbolProto = _Symbol ? _Symbol.prototype : undefined,
+	    symbolToString = symbolProto ? symbolProto.toString : undefined;
+	/**
+	 * The base implementation of `_.toString` which doesn't convert nullish
+	 * values to empty strings.
+	 *
+	 * @private
+	 * @param {*} value The value to process.
+	 * @returns {string} Returns the string.
+	 */
+
+	function baseToString(value) {
+	  // Exit early for strings to avoid a performance hit in some environments.
+	  if (typeof value == 'string') {
+	    return value;
+	  }
+
+	  if (isArray$1(value)) {
+	    // Recursively convert values (susceptible to call stack limits).
+	    return arrayMap(value, baseToString) + '';
+	  }
+
+	  if (isSymbol(value)) {
+	    return symbolToString ? symbolToString.call(value) : '';
+	  }
+
+	  var result = value + '';
+	  return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+	}
+
+	/** 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.
+	 */
+
+	function trimmedEndIndex(string) {
+	  var index = string.length;
+
+	  while (index-- && reWhitespace.test(string.charAt(index))) {}
+
+	  return index;
+	}
+
+	/** Used to match leading whitespace. */
+
+	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;
+	}
+
+	/**
+	 * 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$2(value) {
+	  var type = _typeof(value);
+
+	  return value != null && (type == 'object' || type == 'function');
+	}
+
+	/** Used as references for various `Number` constants. */
+
+	var NAN = 0 / 0;
+	/** Used to detect bad signed hexadecimal string values. */
+
+	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	/** Used to detect binary string values. */
+
+	var reIsBinary = /^0b[01]+$/i;
+	/** Used to detect octal string values. */
+
+	var reIsOctal = /^0o[0-7]+$/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
+	 */
+
+	function toNumber(value) {
+	  if (typeof value == 'number') {
+	    return value;
+	  }
+
+	  if (isSymbol(value)) {
+	    return NAN;
+	  }
+
+	  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;
+	}
+
+	/**
+	 * Converts `value` to a string. An empty string is returned for `null`
+	 * and `undefined` values. The sign of `-0` is preserved.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to convert.
+	 * @returns {string} Returns the converted string.
+	 * @example
+	 *
+	 * _.toString(null);
+	 * // => ''
+	 *
+	 * _.toString(-0);
+	 * // => '-0'
+	 *
+	 * _.toString([1, 2, 3]);
+	 * // => '1,2,3'
+	 */
+
+	function toString$3(value) {
+	  return value == null ? '' : baseToString(value);
+	}
+
+	/**
+	 * The base implementation of `_.propertyOf` without support for deep paths.
+	 *
+	 * @private
+	 * @param {Object} object The object to query.
+	 * @returns {Function} Returns the new accessor function.
+	 */
+	function basePropertyOf(object) {
+	  return function (key) {
+	    return object == null ? undefined : object[key];
+	  };
+	}
+
+	/**
+	 * 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 = function now() {
+	  return root.Date.now();
+	};
+
+	/** Error message constants. */
+
+	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;
+	/**
+	 * 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;
+
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT$1);
+	  }
+
+	  wait = toNumber(wait) || 0;
+
+	  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;
+	  }
+
+	  function invokeFunc(time) {
+	    var args = lastArgs,
+	        thisArg = lastThis;
+	    lastArgs = lastThis = undefined;
+	    lastInvokeTime = time;
+	    result = func.apply(thisArg, args);
+	    return result;
+	  }
+
+	  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;
+	  }
+
+	  function remainingWait(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime,
+	        timeWaiting = wait - timeSinceLastCall;
+	    return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+	  }
+
+	  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.
+
+	    return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+	  }
+
+	  function timerExpired() {
+	    var time = now();
+
+	    if (shouldInvoke(time)) {
+	      return trailingEdge(time);
+	    } // Restart the timer.
+
+
+	    timerId = setTimeout(timerExpired, remainingWait(time));
+	  }
+
+	  function trailingEdge(time) {
+	    timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+	    // debounced at least once.
+
+	    if (trailing && lastArgs) {
+	      return invokeFunc(time);
+	    }
+
+	    lastArgs = lastThis = undefined;
+	    return result;
+	  }
+
+	  function cancel() {
+	    if (timerId !== undefined) {
+	      clearTimeout(timerId);
+	    }
+
+	    lastInvokeTime = 0;
+	    lastArgs = lastCallTime = lastThis = timerId = undefined;
+	  }
+
+	  function flush() {
+	    return timerId === undefined ? result : trailingEdge(now());
+	  }
 
-	  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]);
-	  //   }
-	  // }
+	  function debounced() {
+	    var time = now(),
+	        isInvoking = shouldInvoke(time);
+	    lastArgs = arguments;
+	    lastThis = this;
+	    lastCallTime = time;
 
-	  var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
-	  exports.tashkeel = tashkeel;
+	    if (isInvoking) {
+	      if (timerId === undefined) {
+	        return leadingEdge(lastCallTime);
+	      }
 
-	  function addToTashkeel(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	      exports.tashkeel = tashkeel += String.fromCharCode(i);
+	      if (maxing) {
+	        // Handle invocations in a tight loop.
+	        clearTimeout(timerId);
+	        timerId = setTimeout(timerExpired, wait);
+	        return invokeFunc(lastCallTime);
+	      }
 	    }
-	  }
 
-	  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);
+	    if (timerId === undefined) {
+	      timerId = setTimeout(timerExpired, wait);
 	    }
+
+	    return result;
 	  }
 
-	  addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
+	  debounced.cancel = cancel;
+	  debounced.flush = flush;
+	  return debounced;
+	}
+
+	/** Used to map characters to HTML entities. */
 
-	  addToLineBreakers(0x0621, 0x0625);
-	  addToLineBreakers(0x062F, 0x0632);
-	  addToLineBreakers(0x0660, 0x066D); // numerals, math
+	var htmlEscapes = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
+	/**
+	 * Used by `_.escape` to convert characters to HTML entities.
+	 *
+	 * @private
+	 * @param {string} chr The matched character to escape.
+	 * @returns {string} Returns the escaped character.
+	 */
 
-	  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
+	var escapeHtmlChar = basePropertyOf(htmlEscapes);
 
-	  addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-	  // numerals, math
+	/** Used to match HTML entities and HTML characters. */
 
-	  addToLineBreakers(0x10E60, 0x10E7F);
-	  addToLineBreakers(0x1EC70, 0x1ECBF);
-	  addToLineBreakers(0x1EE00, 0x1EEFF);
-	});
+	var reUnescapedHtml = /[&<>"']/g,
+	    reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+	/**
+	 * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+	 * corresponding HTML entities.
+	 *
+	 * **Note:** No other characters are escaped. To escape additional
+	 * characters use a third-party library like [_he_](https://mths.be/he).
+	 *
+	 * Though the ">" character is escaped for symmetry, characters like
+	 * ">" and "/" don't need escaping in HTML and have no special meaning
+	 * unless they're part of a tag or unquoted attribute value. See
+	 * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+	 * (under "semi-related fun fact") for more details.
+	 *
+	 * When working with HTML you should always
+	 * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+	 * XSS vectors.
+	 *
+	 * @static
+	 * @since 0.1.0
+	 * @memberOf _
+	 * @category String
+	 * @param {string} [string=''] The string to escape.
+	 * @returns {string} Returns the escaped string.
+	 * @example
+	 *
+	 * _.escape('fred, barney, & pebbles');
+	 * // => 'fred, barney, &amp; pebbles'
+	 */
+
+	function escape$4(string) {
+	  string = toString$3(string);
+	  return string && reHasUnescapedHtml.test(string) ? string.replace(reUnescapedHtml, escapeHtmlChar) : string;
+	}
+
+	/** 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);
+	  }
 
-	var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
+	  if (isObject$2(options)) {
+	    leading = 'leading' in options ? !!options.leading : leading;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
+	  return debounce(func, wait, {
+	    'leading': leading,
+	    'maxWait': wait,
+	    'trailing': trailing
 	  });
+	}
 
-	  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);
-	        }
+	var $$f = _export;
+	var lastIndexOf = arrayLastIndexOf;
+
+	// `Array.prototype.lastIndexOf` method
+	// https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+	// eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
+	$$f({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {
+	  lastIndexOf: lastIndexOf
+	});
+
+	/** Used to map HTML entities to characters. */
+
+	var htmlUnescapes = {
+	  '&amp;': '&',
+	  '&lt;': '<',
+	  '&gt;': '>',
+	  '&quot;': '"',
+	  '&#39;': "'"
+	};
+	/**
+	 * Used by `_.unescape` to convert HTML entities to characters.
+	 *
+	 * @private
+	 * @param {string} chr The matched character to unescape.
+	 * @returns {string} Returns the unescaped character.
+	 */
+
+	var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+
+	/** Used to match HTML entities and HTML characters. */
+
+	var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+	    reHasEscapedHtml = RegExp(reEscapedHtml.source);
+	/**
+	 * The inverse of `_.escape`; this method converts the HTML entities
+	 * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
+	 * their corresponding characters.
+	 *
+	 * **Note:** No other HTML entities are unescaped. To unescape additional
+	 * HTML entities use a third-party library like [_he_](https://mths.be/he).
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.6.0
+	 * @category String
+	 * @param {string} [string=''] The string to unescape.
+	 * @returns {string} Returns the unescaped string.
+	 * @example
+	 *
+	 * _.unescape('fred, barney, &amp; pebbles');
+	 * // => 'fred, barney, & pebbles'
+	 */
+
+	function unescape$3(string) {
+	  string = toString$3(string);
+	  return string && reHasEscapedHtml.test(string) ? string.replace(reEscapedHtml, unescapeHtmlChar) : string;
+	}
+
+	var global$4 = global$1o;
+	var isArray = isArray$8;
+	var lengthOfArrayLike$1 = lengthOfArrayLike$i;
+	var bind$3 = functionBindContext;
+
+	var TypeError$2 = global$4.TypeError;
+
+	// `FlattenIntoArray` abstract operation
+	// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray
+	var flattenIntoArray$1 = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {
+	  var targetIndex = start;
+	  var sourceIndex = 0;
+	  var mapFn = mapper ? bind$3(mapper, thisArg) : false;
+	  var element, elementLen;
+
+	  while (sourceIndex < sourceLen) {
+	    if (sourceIndex in source) {
+	      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];
+
+	      if (depth > 0 && isArray(element)) {
+	        elementLen = lengthOfArrayLike$1(element);
+	        targetIndex = flattenIntoArray$1(target, original, element, elementLen, targetIndex, depth - 1) - 1;
 	      } else {
-	        letters.push(letter);
+	        if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError$2('Exceed the acceptable array length');
+	        target[targetIndex] = element;
 	      }
 
-	      if (reference.tashkeel.indexOf(letter) === -1) {
-	        lastLetter = letter;
-	      }
-	    });
-	    return letters;
+	      targetIndex++;
+	    }
+	    sourceIndex++;
 	  }
+	  return targetIndex;
+	};
+
+	var flattenIntoArray_1 = flattenIntoArray$1;
 
-	  exports.GlyphSplitter = GlyphSplitter;
+	var $$e = _export;
+	var flattenIntoArray = flattenIntoArray_1;
+	var aCallable = aCallable$a;
+	var toObject = toObject$i;
+	var lengthOfArrayLike = lengthOfArrayLike$i;
+	var arraySpeciesCreate = arraySpeciesCreate$4;
+
+	// `Array.prototype.flatMap` method
+	// https://tc39.es/ecma262/#sec-array.prototype.flatmap
+	$$e({ target: 'Array', proto: true }, {
+	  flatMap: function flatMap(callbackfn /* , thisArg */) {
+	    var O = toObject(this);
+	    var sourceLen = lengthOfArrayLike(O);
+	    var A;
+	    aCallable(callbackfn);
+	    A = arraySpeciesCreate(O, 0);
+	    A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	    return A;
+	  }
 	});
 
-	var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
+	// this method was added to unscopables after implementation
+	// in popular engines, so it's moved to a separate module
+	var addToUnscopables = addToUnscopables$6;
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
-	  });
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables('flatMap');
 
-	  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);
-	      }
+	var $$d = _export;
+	var uncurryThis$6 = functionUncurryThis;
+	var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+	var toLength$2 = toLength$c;
+	var toString$2 = toString$k;
+	var notARegExp$1 = notARegexp;
+	var requireObjectCoercible$2 = requireObjectCoercible$e;
+	var correctIsRegExpLogic$1 = correctIsRegexpLogic;
+
+	// eslint-disable-next-line es/no-string-prototype-endswith -- safe
+	var un$EndsWith = uncurryThis$6(''.endsWith);
+	var slice$2 = uncurryThis$6(''.slice);
+	var min$1 = Math.min;
 
-	      if (reference.tashkeel.indexOf(letter) === -1) {
-	        // don't allow tashkeel to hide line break
-	        lastLetter = letter;
-	      }
-	    });
-	    return letters;
+	var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegExpLogic$1('endsWith');
+	// 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, 'endsWith');
+	  return descriptor && !descriptor.writable;
+	}();
+
+	// `String.prototype.endsWith` method
+	// https://tc39.es/ecma262/#sec-string.prototype.endswith
+	$$d({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
+	  endsWith: function endsWith(searchString /* , endPosition = @length */) {
+	    var that = toString$2(requireObjectCoercible$2(this));
+	    notARegExp$1(searchString);
+	    var endPosition = arguments.length > 1 ? arguments[1] : undefined;
+	    var len = that.length;
+	    var end = endPosition === undefined ? len : min$1(toLength$2(endPosition), len);
+	    var search = toString$2(searchString);
+	    return un$EndsWith
+	      ? un$EndsWith(that, search, end)
+	      : slice$2(that, end - search.length, end) === search;
+	  }
+	});
+
+	// https://github.com/tc39/proposal-string-pad-start-end
+	var uncurryThis$5 = functionUncurryThis;
+	var toLength$1 = toLength$c;
+	var toString$1 = toString$k;
+	var $repeat = stringRepeat;
+	var requireObjectCoercible$1 = requireObjectCoercible$e;
+
+	var repeat$1 = uncurryThis$5($repeat);
+	var stringSlice$2 = uncurryThis$5(''.slice);
+	var ceil = Math.ceil;
+
+	// `String.prototype.{ padStart, padEnd }` methods implementation
+	var createMethod = function (IS_END) {
+	  return function ($this, maxLength, fillString) {
+	    var S = toString$1(requireObjectCoercible$1($this));
+	    var intMaxLength = toLength$1(maxLength);
+	    var stringLength = S.length;
+	    var fillStr = fillString === undefined ? ' ' : toString$1(fillString);
+	    var fillLen, stringFiller;
+	    if (intMaxLength <= stringLength || fillStr == '') return S;
+	    fillLen = intMaxLength - stringLength;
+	    stringFiller = repeat$1(fillStr, ceil(fillLen / fillStr.length));
+	    if (stringFiller.length > fillLen) stringFiller = stringSlice$2(stringFiller, 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)
+	};
+
+	// https://github.com/zloirock/core-js/issues/280
+	var userAgent = engineUserAgent;
+
+	var stringPadWebkitBug = /Version\/10(?:\.\d+){1,2}(?: [\w./]+)?(?: Mobile\/\w+)? Safari\//.test(userAgent);
+
+	var $$c = _export;
+	var $padEnd = stringPad.end;
+	var WEBKIT_BUG$1 = stringPadWebkitBug;
+
+	// `String.prototype.padEnd` method
+	// https://tc39.es/ecma262/#sec-string.prototype.padend
+	$$c({ target: 'String', proto: true, forced: WEBKIT_BUG$1 }, {
+	  padEnd: function padEnd(maxLength /* , fillString = ' ' */) {
+	    return $padEnd(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);
 	  }
+	});
 
-	  exports.BaselineSplitter = BaselineSplitter;
+	var $$b = _export;
+	var $padStart = stringPad.start;
+	var WEBKIT_BUG = stringPadWebkitBug;
+
+	// `String.prototype.padStart` method
+	// https://tc39.es/ecma262/#sec-string.prototype.padstart
+	$$b({ target: 'String', proto: true, forced: WEBKIT_BUG }, {
+	  padStart: function padStart(maxLength /* , fillString = ' ' */) {
+	    return $padStart(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);
+	  }
 	});
 
-	var Normalization = createCommonjsModule(function (module, exports) {
+	var $$a = _export;
+	var $reduceRight = arrayReduce.right;
+	var arrayMethodIsStrict = arrayMethodIsStrict$9;
+	var CHROME_VERSION = engineV8Version;
+	var IS_NODE = engineIsNode;
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
-	  });
+	var STRICT_METHOD = arrayMethodIsStrict('reduceRight');
+	// 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;
+
+	// `Array.prototype.reduceRight` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reduceright
+	$$a({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
+	  reduceRight: function reduceRight(callbackfn /* , initialValue */) {
+	    return $reduceRight(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	var $$9 = _export;
+	var repeat = stringRepeat;
+
+	// `String.prototype.repeat` method
+	// https://tc39.es/ecma262/#sec-string.prototype.repeat
+	$$9({ target: 'String', proto: true }, {
+	  repeat: repeat
+	});
+
+	var $$8 = _export;
+	var uncurryThis$4 = functionUncurryThis;
+	var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var toLength = toLength$c;
+	var toString = toString$k;
+	var notARegExp = notARegexp;
+	var requireObjectCoercible = requireObjectCoercible$e;
+	var correctIsRegExpLogic = correctIsRegexpLogic;
+
+	// eslint-disable-next-line es/no-string-prototype-startswith -- safe
+	var un$StartsWith = uncurryThis$4(''.startsWith);
+	var stringSlice$1 = uncurryThis$4(''.slice);
+	var min = Math.min;
+
+	var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('startsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
+	  var descriptor = getOwnPropertyDescriptor(String.prototype, 'startsWith');
+	  return descriptor && !descriptor.writable;
+	}();
+
+	// `String.prototype.startsWith` method
+	// https://tc39.es/ecma262/#sec-string.prototype.startswith
+	$$8({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
+	  startsWith: function startsWith(searchString /* , position = 0 */) {
+	    var that = toString(requireObjectCoercible(this));
+	    notARegExp(searchString);
+	    var index = toLength(min(arguments.length > 1 ? arguments[1] : undefined, that.length));
+	    var search = toString(searchString);
+	    return un$StartsWith
+	      ? un$StartsWith(that, search, index)
+	      : stringSlice$1(that, index, index + search.length) === search;
+	  }
+	});
+
+	var $$7 = _export;
+	var $trimEnd = stringTrim.end;
+	var forcedStringTrimMethod$1 = stringTrimForced;
+
+	var FORCED$4 = forcedStringTrimMethod$1('trimEnd');
+
+	var trimEnd = FORCED$4 ? function trimEnd() {
+	  return $trimEnd(this);
+	// eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe
+	} : ''.trimEnd;
+
+	// `String.prototype.{ trimEnd, trimRight }` methods
+	// https://tc39.es/ecma262/#sec-string.prototype.trimend
+	// https://tc39.es/ecma262/#String.prototype.trimright
+	$$7({ target: 'String', proto: true, name: 'trimEnd', forced: FORCED$4 }, {
+	  trimEnd: trimEnd,
+	  trimRight: trimEnd
+	});
+
+	var $$6 = _export;
+	var $trimStart = stringTrim.start;
+	var forcedStringTrimMethod = stringTrimForced;
+
+	var FORCED$3 = forcedStringTrimMethod('trimStart');
+
+	var trimStart = FORCED$3 ? function trimStart() {
+	  return $trimStart(this);
+	// eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe
+	} : ''.trimStart;
+
+	// `String.prototype.{ trimStart, trimLeft }` methods
+	// https://tc39.es/ecma262/#sec-string.prototype.trimstart
+	// https://tc39.es/ecma262/#String.prototype.trimleft
+	$$6({ target: 'String', proto: true, name: 'trimStart', forced: FORCED$3 }, {
+	  trimStart: trimStart,
+	  trimLeft: trimStart
+	});
+
+	var _mainLocalizer = coreLocalizer(); // singleton
+
+
+	var _t = _mainLocalizer.t;
+	// coreLocalizer manages language and locale parameters including translated strings
+	//
+
+	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: {…} },
+	  // …
+	  // }
+
+	  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
+
+	  var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
+
+	  var _localeCodes = ['en-US', 'en'];
+	  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.localeCodes = function () {
+	    return _localeCodes;
+	  };
+
+	  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;
 
-	  function Normal(word, breakPresentationForm) {
-	    // default is to turn initial/isolated/medial/final presentation form to generic
-	    if (typeof breakPresentationForm === 'undefined') {
-	      breakPresentationForm = true;
+	    if (typeof codes === 'string') {
+	      // be generous and accept delimited strings as input
+	      _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+	    } else {
+	      _preferredLocaleCodes = codes;
 	    }
 
-	    var returnable = '';
-	    word.split('').forEach(function (letter) {
-	      if (!isArabic_1.isArabic(letter)) {
-	        returnable += letter;
-	        return;
+	    return localizer;
+	  };
+
+	  var _loadPromise;
+
+	  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();
+
+	    for (var scopeId in localeDirs) {
+	      var key = "locales_index_".concat(scopeId);
+
+	      if (!fileMap[key]) {
+	        fileMap[key] = localeDirs[scopeId] + '/index.min.json';
 	      }
 
-	      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);
+	      filesToFetch.push(key);
+	    }
 
-	        for (var v = 0; v < versions.length; v++) {
-	          var localVersion = letterForms[versions[v]];
+	    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);
 
-	          if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-	            // look at this embedded object
-	            var embeddedForms = Object.keys(localVersion);
+	      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
 
-	            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'];
-	                    }
+	      _localeCodes = localesToUseFrom(requestedLocales);
+	      _localeCode = _localeCodes[0]; // Run iD in the highest-priority locale; the rest are fallbacks
 
-	                    return;
-	                  } // console.log('keeping this letter');
+	      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
 
 
-	                  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');
+	        _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
 
-	                  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');
+	  function localesToUseFrom(requestedLocales) {
+	    var supportedLocales = _dataLocales;
+	    var toUse = [];
 
+	    for (var i in requestedLocales) {
+	      var locale = requestedLocales[i];
+	      if (supportedLocales[locale]) toUse.push(locale);
 
-	            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');
+	      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
 
-	            return;
-	          }
-	        }
-	      } // try ligatures
 
+	    return utilArrayUniq(toUse);
+	  }
 
-	      for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-	        var normalForm = reference.ligatureList[v2];
+	  function updateForCurrentLocale() {
+	    if (!_localeCode) return;
+	    _languageCode = _localeCode.split('-')[0];
+	    var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+	    var hash = utilStringQs(window.location.hash);
 
-	        if (normalForm !== 'words') {
-	          var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);
+	    if (hash.rtl === 'true') {
+	      _textDirection = 'rtl';
+	    } else if (hash.rtl === 'false') {
+	      _textDirection = 'ltr';
+	    } else {
+	      _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+	    }
 
-	          for (var f = 0; f < ligForms.length; f++) {
-	            if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
-	              returnable += normalForm;
-	              return;
-	            }
-	          }
-	        }
-	      } // try words ligatures
+	    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
 
 
-	      for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-	        var _normalForm = reference.ligatureWordList[v3];
+	  localizer.loadLocale = function (locale, scopeId, directory) {
+	    // US English is the default
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
 
-	        if (unicodeLigatures["default"].words[_normalForm] === letter) {
-	          returnable += _normalForm;
-	          return;
-	        }
-	      }
+	    if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
+	      // already loaded
+	      return Promise.resolve(locale);
+	    }
 
-	      returnable += letter; // console.log('kept the letter')
+	    var fileMap = _mainFileFetcher.fileMap();
+	    var key = "locale_".concat(scopeId, "_").concat(locale);
+
+	    if (!fileMap[key]) {
+	      fileMap[key] = "".concat(directory, "/").concat(locale, ".min.json");
+	    }
+
+	    return _mainFileFetcher.get(key).then(function (d) {
+	      if (!_localeStrings[scopeId]) _localeStrings[scopeId] = {};
+	      _localeStrings[scopeId][locale] = d[locale];
+	      return locale;
 	    });
-	    return returnable;
-	  }
+	  };
 
-	  exports.Normal = Normal;
-	});
+	  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 CharShaper_1 = createCommonjsModule(function (module, exports) {
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
-	  });
+	  function pluralRule(number, localeCode) {
+	    // modern browsers have this functionality built-in
+	    var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
+
+	    if (rules) {
+	      return rules.select(number);
+	    } // fallback to basic one/other, as in English
+
+
+	    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
+	  */
 
-	  function CharShaper(letter, form) {
-	    if (!isArabic_1.isArabic(letter)) {
-	      // fail not Arabic
-	      throw new Error('Not Arabic');
+
+	  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('.');
 	    }
 
-	    if (letter === "\u0621") {
-	      // hamza alone
-	      return "\u0621";
+	    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
+
+	    if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+	    var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];
+
+	    while (result !== undefined && path.length) {
+	      result = result[path.pop()];
 	    }
 
-	    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);
+	    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';
+	          });
 
-	      for (var v = 0; v < versions.length; v++) {
-	        var localVersion = letterForms[versions[v]];
+	          if (number !== undefined) {
+	            var rule = pluralRule(number, locale);
 
-	        if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-	          if (versions.indexOf(form) > -1) {
-	            return letterForms[form];
+	            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];
+	            }
 	          }
-	        } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-	          // check embedded
-	          var embeddedVersions = Object.keys(localVersion);
+	        }
+
+	        if (typeof result === 'string') {
+	          for (var key in replacements) {
+	            var value = replacements[key];
 
-	          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];
+	            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();
 	              }
 	            }
+
+	            var token = "{".concat(key, "}");
+	            var regex = new RegExp(token, 'g');
+	            result = result.replace(regex, value);
 	          }
 	        }
 	      }
+
+	      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
+
+
+	    var index = _localeCodes.indexOf(locale);
+
+	    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);
 	    }
-	  }
 
-	  exports.CharShaper = CharShaper;
-	});
+	    if (replacements && 'default' in replacements) {
+	      // Fallback to a default value if one is specified in `replacements`
+	      return {
+	        text: replacements["default"],
+	        locale: null
+	      };
+	    }
+
+	    var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
+	    if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
+
+	    return {
+	      text: missing,
+	      locale: 'en'
+	    };
+	  };
+
+	  localizer.hasTextForStringId = function (stringId) {
+	    return !!localizer.tInfo(stringId, {
+	      "default": 'nothing found'
+	    }).locale;
+	  }; // Returns only the localized text, discarding the locale info
 
-	var WordShaper_1 = createCommonjsModule(function (module, exports) {
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
-	  });
+	  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
 
-	  function WordShaper(word) {
-	    var state = 'initial';
-	    var output = '';
+	  /**
+	   * @deprecated This method is considered deprecated. Instead, use the direct DOM manipulating
+	   *             method `t.append`.
+	   */
 
-	    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;
-	        }
+	  localizer.t.html = function (stringId, replacements, locale) {
+	    // replacement string might be html unsafe, so we need to escape it except if it is explicitly marked as html code
+	    replacements = Object.assign({}, replacements);
 
-	        if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-	          nextLetter = word[nxw];
-	          break;
-	        }
+	    for (var k in replacements) {
+	      if (typeof replacements[k] === 'string') {
+	        replacements[k] = escape$4(replacements[k]);
 	      }
 
-	      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';
+	      if (_typeof(replacements[k]) === 'object' && typeof replacements[k].html === 'string') {
+	        replacements[k] = replacements[k].html;
 	      }
 	    }
 
-	    return output;
-	  }
+	    var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
 
-	  exports.WordShaper = WordShaper;
-	});
+	    if (info.text) {
+	      return "<span class=\"localized-text\" lang=\"".concat(info.locale || 'und', "\">").concat(info.text, "</span>");
+	    } else {
+	      return '';
+	    }
+	  }; // Adds localized text wrapped as an HTML span element with locale info to the DOM
 
-	var ParentLetter_1 = createCommonjsModule(function (module, exports) {
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
-	  });
+	  localizer.t.append = function (stringId, replacements, locale) {
+	    return function (selection) {
+	      var info = localizer.tInfo(stringId, replacements, locale);
+	      return selection.append('span').attr('class', 'localized-text').attr('lang', info.locale || 'und').text((replacements && replacements.prefix || '') + info.text + (replacements && replacements.suffix || ''));
+	    };
+	  };
 
-	  function ParentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	      throw new Error('Not an Arabic letter');
-	    }
+	  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
 
-	    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 (options && options.localOnly) return null;
+	    var langInfo = _dataLanguages[code];
 
-	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-	          // look at this embedded object
-	          var embeddedForms = Object.keys(localVersion);
+	    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
 
-	          for (var ef = 0; ef < embeddedForms.length; ef++) {
-	            var form = localVersion[embeddedForms[ef]];
+	        if (_languageNames[base]) {
+	          // base language name in locale language
+	          var scriptCode = langInfo.script;
+	          var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
 
-	            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 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 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);
+	    return code; // if not found, use the code
+	  };
 
-	      for (var v = 0; v < versions.length; v++) {
-	        var localVersion = letterForms[versions[v]];
+	  return localizer;
+	}
 
-	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-	          // look at this embedded object
-	          var embeddedForms = Object.keys(localVersion);
+	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
+	// and decorated with some extra methods for searching and matching geometry
+	//
 
-	          for (var ef = 0; ef < embeddedForms.length; ef++) {
-	            var form = localVersion[embeddedForms[ef]];
+	function presetCollection(collection) {
+	  var MAXRESULTS = 50;
+	  var _this = {};
+	  var _memo = {};
+	  _this.collection = collection;
 
-	            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;
-	        }
-	      }
+	  _this.item = function (id) {
+	    if (_memo[id]) return _memo[id];
 
-	      return null;
-	    }
-	  }
+	    var found = _this.collection.find(function (d) {
+	      return d.id === id;
+	    });
 
-	  exports.GrandparentLetter = GrandparentLetter;
-	});
+	    if (found) _memo[id] = found;
+	    return found;
+	  };
 
-	var lib = createCommonjsModule(function (module, exports) {
+	  _this.index = function (id) {
+	    return _this.collection.findIndex(function (d) {
+	      return d.id === id;
+	    });
+	  };
 
-	  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;
-	});
+	  _this.matchGeometry = function (geometry) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d.matchGeometry(geometry);
+	    }));
+	  };
 
-	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
+	  _this.matchAllGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d && d.matchAllGeometry(geometries);
+	    }));
+	  };
 
-	  if (arabicRegex.test(inputText)) {
-	    inputText = lib.WordShaper(inputText);
-	  }
+	  _this.matchAnyGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return geometries.some(function (geom) {
+	        return d.matchGeometry(geom);
+	      });
+	    }));
+	  };
 
-	  for (var n = 0; n < inputText.length; n++) {
-	    var c = inputText[n];
+	  _this.fallback = function (geometry) {
+	    var id = geometry;
+	    if (id === 'vertex') id = 'point';
+	    return _this.item(id);
+	  };
 
-	    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 = [];
-	      }
+	  _this.search = function (value, geometry, loc) {
+	    if (!value) return _this; // don't remove diacritical characters since we're assuming the user is being intentional
 
-	      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 = [];
-	      }
-	    }
-	  }
+	    value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
 
-	  ret += rtlBuffer.reverse().join('');
-	  return ret;
-	}
+	    function leading(a) {
+	      var index = a.indexOf(value);
+	      return index === 0 || a[index - 1] === ' ';
+	    } // match at name beginning only
 
-	var propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
-	// `Object.{ entries, values }` methods implementation
-	var createMethod$5 = 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 || propertyIsEnumerable.call(O, key)) {
-	        result.push(TO_ENTRIES ? [key, O[key]] : O[key]);
-	      }
+	    function leadingStrict(a) {
+	      var index = a.indexOf(value);
+	      return index === 0;
 	    }
-	    return result;
-	  };
-	};
-
-	var objectToArray = {
-	  // `Object.entries` method
-	  // https://tc39.github.io/ecma262/#sec-object.entries
-	  entries: createMethod$5(true),
-	  // `Object.values` method
-	  // https://tc39.github.io/ecma262/#sec-object.values
-	  values: createMethod$5(false)
-	};
 
-	var $values = objectToArray.values;
-
-	// `Object.values` method
-	// https://tc39.github.io/ecma262/#sec-object.values
-	_export({ target: 'Object', stat: true }, {
-	  values: function values(O) {
-	    return $values(O);
-	  }
-	});
+	    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
 
-	// https://github.com/openstreetmap/iD/issues/772
-	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
-	var _storage;
+	        if (value === aCompare) return -1;
+	        if (value === bCompare) return 1; // priority for higher matchScore
 
-	try {
-	  _storage = localStorage;
-	} catch (e) {} // eslint-disable-line no-empty
+	        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
 
-	_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];
+	        return aCompare.length - bCompare.length;
+	      };
 	    }
-	  };
-	}(); //
-	// corePreferences is an interface for persisting basic key-value strings
-	// within and between iD sessions on the same site.
-	//
 
+	    var pool = _this.collection;
 
-	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');
+	    if (Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
+	      pool = pool.filter(function (a) {
+	        return !a.locationSetID || validLocations[a.locationSetID];
+	      });
 	    }
-	    /* eslint-enable no-console */
 
-	  }
-	}
+	    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
 
-	function responseText(response) {
-	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
-	  return response.text();
-	}
+	    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
 
-	function d3_text (input, init) {
-	  return fetch(input, init).then(responseText);
-	}
+	    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 responseJson(response) {
-	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
-	  if (response.status === 204 || response.status === 205) return;
-	  return response.json();
-	}
+	    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
 
-	function d3_json (input, init) {
-	  return fetch(input, init).then(responseJson);
-	}
+	    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
 
-	function parser(type) {
-	  return function (input, init) {
-	    return d3_text(input, init).then(function (text) {
-	      return new DOMParser().parseFromString(text, type);
+	    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);
+
+	    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));
 	  };
-	}
 
-	var d3_xml = parser("application/xml");
-	var svg = parser("image/svg+xml");
+	  return _this;
+	}
 
-	var _mainFileFetcher = coreFileFetcher(); // singleton
-	// coreFileFetcher asynchronously fetches data from JSON files
+	// `presetCategory` builds a `presetCollection` of member presets,
+	// decorated with some extra methods for searching and matching geometry
 	//
 
-	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
+	function presetCategory(categoryID, category, allPresets) {
+	  var _this = Object.assign({}, category); // shallow copy
 
-	  _this.cache = function () {
-	    return _cachedData;
-	  }; // Returns a Promise to fetch data
-	  // (resolved with the data if we have it already)
 
+	  var _searchName; // cache
 
-	  _this.get = function (which) {
-	    if (_cachedData[which]) {
-	      return Promise.resolve(_cachedData[which]);
-	    }
 
-	    var file = _fileMap[which];
+	  var _searchNameStripped; // cache
 
-	    var url = file && _this.asset(file);
 
-	    if (!url) {
-	      return Promise.reject("Unknown data file for \"".concat(which, "\""));
+	  _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);
+	      }
 	    }
 
-	    var prom = _inflight[url];
+	    return acc;
+	  }, []);
 
-	    if (!prom) {
-	      _inflight[url] = prom = d3_json(url).then(function (result) {
-	        delete _inflight[url];
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	        if (!result) {
-	          throw new Error("No data loaded for \"".concat(which, "\""));
-	        }
+	  _this.matchAllGeometry = function (geometries) {
+	    return _this.members.collection.some(function (preset) {
+	      return preset.matchAllGeometry(geometries);
+	    });
+	  };
 
-	        _cachedData[which] = result;
-	        return result;
-	      })["catch"](function (err) {
-	        delete _inflight[url];
-	        throw err;
-	      });
-	    }
+	  _this.matchScore = function () {
+	    return -1;
+	  };
 
-	    return prom;
-	  }; // Accessor for the file map
+	  _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
+	    });
+	  };
 
-	  _this.fileMap = function (val) {
-	    if (!arguments.length) return _fileMap;
-	    _fileMap = val;
-	    return _this;
+	  _this.terms = function () {
+	    return [];
 	  };
 
-	  var _assetPath = '';
+	  _this.searchName = function () {
+	    if (!_searchName) {
+	      _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+	    }
 
-	  _this.assetPath = function (val) {
-	    if (!arguments.length) return _assetPath;
-	    _assetPath = val;
-	    return _this;
+	    return _searchName;
 	  };
 
-	  var _assetMap = {};
+	  _this.searchNameStripped = function () {
+	    if (!_searchNameStripped) {
+	      _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-	  _this.assetMap = function (val) {
-	    if (!arguments.length) return _assetMap;
-	    _assetMap = val;
-	    return _this;
-	  };
+	      if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-	  _this.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) return val;
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
+	      _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+	    }
+
+	    return _searchNameStripped;
 	  };
 
 	  return _this;
 	}
 
-	var $findIndex$1 = arrayIteration.findIndex;
+	// `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
 
 
-	var FIND_INDEX = 'findIndex';
-	var SKIPS_HOLES$1 = true;
+	  _this.id = fieldID; // for use in classes, element ids, css selectors
 
-	var USES_TO_LENGTH$b = arrayMethodUsesToLength(FIND_INDEX);
+	  _this.safeid = utilSafeClassName(fieldID);
 
-	// Shouldn't skip holes
-	if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES$1 = false; });
+	  _this.matchGeometry = function (geom) {
+	    return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+	  };
 
-	// `Array.prototype.findIndex` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.findindex
-	_export({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 || !USES_TO_LENGTH$b }, {
-	  findIndex: function findIndex(callbackfn /* , that = undefined */) {
-	    return $findIndex$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
+	  _this.matchAllGeometry = function (geometries) {
+	    return !_this.geometry || geometries.every(function (geom) {
+	      return _this.geometry.indexOf(geom) !== -1;
+	    });
+	  };
 
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-	addToUnscopables(FIND_INDEX);
+	  _this.t = function (scope, options) {
+	    return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	var $includes$1 = arrayIncludes.includes;
+	  _this.t.html = function (scope, options) {
+	    return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
+	  _this.hasTextForStringId = function (scope) {
+	    return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
+	  };
 
+	  _this.title = function () {
+	    return _this.overrideLabel || _this.t('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	var USES_TO_LENGTH$c = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
+	  _this.label = function () {
+	    return _this.overrideLabel || _this.t.html('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	// `Array.prototype.includes` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.includes
-	_export({ target: 'Array', proto: true, forced: !USES_TO_LENGTH$c }, {
-	  includes: function includes(el /* , fromIndex = 0 */) {
-	    return $includes$1(this, el, arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
+	  var _placeholder = _this.placeholder;
 
-	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-	addToUnscopables('includes');
+	  _this.placeholder = function () {
+	    return _this.t('placeholder', {
+	      'default': _placeholder
+	    });
+	  };
 
-	var notARegexp = function (it) {
-	  if (isRegexp(it)) {
-	    throw TypeError("The method doesn't accept regular expressions");
-	  } return it;
-	};
+	  _this.originalTerms = (_this.terms || []).join();
 
-	var MATCH$2 = wellKnownSymbol('match');
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	var correctIsRegexpLogic = function (METHOD_NAME) {
-	  var regexp = /./;
-	  try {
-	    '/./'[METHOD_NAME](regexp);
-	  } catch (e) {
-	    try {
-	      regexp[MATCH$2] = false;
-	      return '/./'[METHOD_NAME](regexp);
-	    } catch (f) { /* empty */ }
-	  } return false;
-	};
+	  _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+	  return _this;
+	}
 
-	// `String.prototype.includes` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype.includes
-	_export({ target: 'String', proto: true, forced: !correctIsRegexpLogic('includes') }, {
-	  includes: function includes(searchString /* , position = 0 */) {
-	    return !!~String(requireObjectCoercible(this))
-	      .indexOf(notARegexp(searchString), arguments.length > 1 ? arguments[1] : undefined);
-	  }
-	});
+	// `presetPreset` decorates a given `preset` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	var _detected;
+	function presetPreset(presetID, preset, addable, allFields, allPresets) {
+	  allFields = allFields || {};
+	  allPresets = allPresets || {};
 
-	function utilDetect(refresh) {
-	  if (_detected && !refresh) return _detected;
-	  _detected = {};
-	  var ua = navigator.userAgent;
-	  var m = null;
-	  /* Browser */
+	  var _this = Object.assign({}, preset); // shallow copy
 
-	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
 
-	  if (m !== null) {
-	    _detected.browser = m[1];
-	    _detected.version = m[2];
-	  }
+	  var _addable = addable || false;
 
-	  if (!_detected.browser) {
-	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
+	  var _resolvedFields; // cache
 
-	    if (m !== null) {
-	      _detected.browser = 'msie';
-	      _detected.version = m[1];
-	    }
-	  }
 
-	  if (!_detected.browser) {
-	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
+	  var _resolvedMoreFields; // cache
 
-	    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);
+	  var _searchName; // cache
 
-	    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..
+	  var _searchNameStripped; // cache
 
 
-	  _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
-	  // Legacy Opera has incomplete svg style support. See #715
+	  _this.id = presetID;
+	  _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
 
-	  _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
+	  _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 || [];
 
-	  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;
-	  }
+	  _this.fields = function () {
+	    return _resolvedFields || (_resolvedFields = resolve('fields'));
+	  };
 
-	  _detected.filedrop = window.FileReader && 'ondrop' in window;
-	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-	  /* Platform */
+	  _this.moreFields = function () {
+	    return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+	  };
 
-	  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';
-	  }
+	  _this.resetFields = function () {
+	    return _resolvedFields = _resolvedMoreFields = null;
+	  };
 
-	  _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.
+	  _this.tags = _this.tags || {};
+	  _this.addTags = _this.addTags || _this.tags;
+	  _this.removeTags = _this.removeTags || _this.addTags;
+	  _this.geometry = _this.geometry || [];
 
-	  _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 */
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	  var loc = window.top.location;
-	  var origin = loc.origin;
+	  _this.matchAllGeometry = function (geoms) {
+	    return geoms.every(_this.matchGeometry);
+	  };
 
-	  if (!origin) {
-	    // for unpatched IE11
-	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
-	  }
+	  _this.matchScore = function (entityTags) {
+	    var tags = _this.tags;
+	    var seen = {};
+	    var score = 0; // match on tags
 
-	  _detected.host = origin + loc.pathname;
-	  return _detected;
-	}
+	    for (var k in tags) {
+	      seen[k] = true;
 
-	var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
-	var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
-	var defineProperty$a = objectDefineProperty.f;
-	var trim$2 = stringTrim.trim;
+	      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 NUMBER = 'Number';
-	var NativeNumber = global_1[NUMBER];
-	var NumberPrototype = NativeNumber.prototype;
 
-	// Opera ~12 has broken Object#toString
-	var BROKEN_CLASSOF = classofRaw(objectCreate(NumberPrototype)) == NUMBER;
+	    var addTags = _this.addTags;
 
-	// `ToNumber` abstract operation
-	// https://tc39.github.io/ecma262/#sec-tonumber
-	var toNumber = function (argument) {
-	  var it = toPrimitive(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;
+	    for (var _k in addTags) {
+	      if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+	        score += _this.originalScore;
 	      }
-	      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.github.io/ecma262/#sec-number-constructor
-	if (isForced_1(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(function () { NumberPrototype.valueOf.call(dummy); }) : classofRaw(dummy) != NUMBER)
-	        ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);
+	    return score;
 	  };
-	  for (var keys$3 = descriptors ? getOwnPropertyNames$2(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'
-	  ).split(','), j$2 = 0, key$1; keys$3.length > j$2; j$2++) {
-	    if (has(NativeNumber, key$1 = keys$3[j$2]) && !has(NumberWrapper, key$1)) {
-	      defineProperty$a(NumberWrapper, key$1, getOwnPropertyDescriptor$3(NativeNumber, key$1));
-	    }
-	  }
-	  NumberWrapper.prototype = NumberPrototype;
-	  NumberPrototype.constructor = NumberWrapper;
-	  redefine(global_1, NUMBER, NumberWrapper);
-	}
 
-	// `Number.MAX_SAFE_INTEGER` constant
-	// https://tc39.github.io/ecma262/#sec-number.max_safe_integer
-	_export({ target: 'Number', stat: true }, {
-	  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
-	});
+	  _this.t = function (scope, options) {
+	    var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t(textID, options);
+	  };
 
-	var aesJs = createCommonjsModule(function (module, exports) {
-	  /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-	  (function (root) {
+	  _this.t.html = function (scope, options) {
+	    var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t.html(textID, options);
+	  };
 
-	    function checkInt(value) {
-	      return parseInt(value) === value;
-	    }
+	  _this.name = function () {
+	    return _this.t('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	    function checkInts(arrayish) {
-	      if (!checkInt(arrayish.length)) {
-	        return false;
-	      }
+	  _this.nameLabel = function () {
+	    return _this.t.html('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	      for (var i = 0; i < arrayish.length; i++) {
-	        if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-	          return false;
-	        }
-	      }
+	  _this.subtitle = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	      return true;
+	      return _t('_tagging.presets.presets.' + path.join('/') + '.name');
 	    }
 
-	    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
-
+	    return null;
+	  };
 
-	      if (Array.isArray(arg)) {
-	        if (!checkInts(arg)) {
-	          throw new Error('Array contains invalid value: ' + arg);
-	        }
+	  _this.subtitleLabel = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	        return new Uint8Array(arg);
-	      } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
+	      return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');
+	    }
 
+	    return null;
+	  };
 
-	      if (checkInt(arg.length) && checkInts(arg)) {
-	        return new Uint8Array(arg);
-	      }
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	      throw new Error('unsupported array-like object');
+	  _this.searchName = function () {
+	    if (!_searchName) {
+	      _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
 	    }
 
-	    function createArray(length) {
-	      return new Uint8Array(length);
-	    }
+	    return _searchName;
+	  };
 
-	    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);
-	        }
-	      }
+	  _this.searchNameStripped = function () {
+	    if (!_searchNameStripped) {
+	      _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-	      targetArray.set(sourceArray, targetStart);
-	    }
+	      if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-	    var convertUtf8 = function () {
-	      function toBytes(text) {
-	        var result = [],
-	            i = 0;
-	        text = encodeURI(text);
+	      _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+	    }
 
-	        while (i < text.length) {
-	          var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
+	    return _searchNameStripped;
+	  };
 
-	          if (c === 37) {
-	            result.push(parseInt(text.substr(i, 2), 16));
-	            i += 2; // otherwise, just the actual byte
-	          } else {
-	            result.push(c);
-	          }
-	        }
+	  _this.isFallback = function () {
+	    var tagCount = Object.keys(_this.tags).length;
+	    return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+	  };
 
-	        return coerceArray(result);
-	      }
+	  _this.addable = function (val) {
+	    if (!arguments.length) return _addable;
+	    _addable = val;
+	    return _this;
+	  };
 
-	      function fromBytes(bytes) {
-	        var result = [],
-	            i = 0;
+	  _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'];
 
-	        while (i < bytes.length) {
-	          var c = bytes[i];
+	    if (qid) {
+	      return {
+	        qid: qid
+	      };
+	    } // Lookup documentation on OSM Wikibase...
 
-	          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('');
-	      }
+	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+	    var value = _this.originalReference.value || _this.tags[key];
 
+	    if (value === '*') {
 	      return {
-	        toBytes: toBytes,
-	        fromBytes: fromBytes
+	        key: key
 	      };
-	    }();
+	    } else {
+	      return {
+	        key: key,
+	        value: value
+	      };
+	    }
+	  };
 
-	    var convertHex = function () {
-	      function toBytes(text) {
-	        var result = [];
+	  _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));
 
-	        for (var i = 0; i < text.length; i += 2) {
-	          result.push(parseInt(text.substr(i, 2), 16));
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+	          delete tags[field.key];
 	        }
+	      });
+	    }
 
-	        return result;
-	      } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
-
-
-	      var Hex = '0123456789abcdef';
+	    delete tags.area;
+	    return tags;
+	  };
 
-	      function fromBytes(bytes) {
-	        var result = [];
+	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
+	    var addTags = _this.addTags;
+	    tags = Object.assign({}, tags); // shallow copy
 
-	        for (var i = 0; i < bytes.length; i++) {
-	          var v = bytes[i];
-	          result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
+	    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';
 	        }
-
-	        return result.join('');
+	      } 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`)
 
-	      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
+	    if (!addTags.hasOwnProperty('area')) {
+	      delete tags.area;
 
-	    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];
+	      if (geometry === 'area') {
+	        var needsAreaTag = true;
 
-	    function convertToInt32(bytes) {
-	      var result = [];
+	        if (_this.geometry.indexOf('line') === -1) {
+	          for (var _k2 in addTags) {
+	            if (_k2 in osmAreaKeys) {
+	              needsAreaTag = false;
+	              break;
+	            }
+	          }
+	        }
 
-	      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 (needsAreaTag) {
+	          tags.area = 'yes';
+	        }
 	      }
-
-	      return result;
 	    }
 
-	    var AES = function AES(key) {
-	      if (!(this instanceof AES)) {
-	        throw Error('AES must be instanitated with `new`');
-	      }
-
-	      Object.defineProperty(this, 'key', {
-	        value: coerceArray(key, true)
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+	          tags[field.key] = field["default"];
+	        }
 	      });
+	    }
 
-	      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
+	    return tags;
+	  }; // For a preset without fields, use the fields of the parent preset.
+	  // Replace {preset} placeholders with the fields of the specified presets.
 
-	      this._Kd = [];
 
-	      for (var i = 0; i <= rounds; i++) {
-	        this._Ke.push([0, 0, 0, 0]);
+	  function resolve(which) {
+	    var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+	    var resolved = [];
+	    fieldIDs.forEach(function (fieldID) {
+	      var match = fieldID.match(/\{(.*)\}/);
 
-	        this._Kd.push([0, 0, 0, 0]);
+	      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 roundKeyCount = (rounds + 1) * 4;
-	      var KC = this.key.length / 4; // convert the key into ints
+	    if (!resolved.length) {
+	      var endIndex = _this.id.lastIndexOf('/');
 
-	      var tk = convertToInt32(this.key); // copy values into round key arrays
+	      var parentID = endIndex && _this.id.substring(0, endIndex);
 
-	      var index;
+	      if (parentID) {
+	        resolved = inheritFields(parentID, which);
+	      }
+	    }
 
-	      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)
+	    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 [];
 
-	      var rconpointer = 0;
-	      var t = KC,
-	          tt;
+	      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=*`
 
-	      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)
+	    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;
+	    }
+	  }
 
-	        } else {
-	          for (var i = 1; i < KC / 2; i++) {
-	            tk[i] ^= tk[i - 1];
-	          }
+	  return _this;
+	}
 
-	          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;
+	var _mainPresetIndex = presetIndex(); // singleton
+	// `presetIndex` wraps a `presetCollection`
+	// with methods for loading new data and returning defaults
+	//
 
-	          for (var i = KC / 2 + 1; i < KC; i++) {
-	            tk[i] ^= tk[i - 1];
-	          }
-	        } // copy values into round key arrays
+	function presetIndex() {
+	  var dispatch = dispatch$8('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 i = 0,
-	            r,
-	            c;
+	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
 
-	        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 _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;
 
-	      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];
-	        }
-	      }
-	    };
+	  var _favorites; // Index of presets by (geometry, tag key).
 
-	    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 _geometryIndex = {
+	    point: {},
+	    vertex: {},
+	    line: {},
+	    area: {},
+	    relation: {}
+	  };
 
-	      var t = convertToInt32(plaintext);
+	  var _loadPromise;
 
-	      for (var i = 0; i < 4; i++) {
-	        t[i] ^= this._Ke[0][i];
-	      } // apply round transforms
+	  _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());
+	    });
+	  }; // `merge` accepts an object containing new preset data (all properties optional):
+	  // {
+	  //   fields: {},
+	  //   presets: {},
+	  //   categories: {},
+	  //   defaults: {},
+	  //   featureCollection: {}
+	  //}
 
-	      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
+	  _this.merge = function (d) {
+	    var newLocationSets = []; // Merge Fields
 
+	    if (d.fields) {
+	      Object.keys(d.fields).forEach(function (fieldID) {
+	        var f = d.fields[fieldID];
 
-	      var result = createArray(16),
-	          tt;
+	        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
 
-	      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;
-	    };
+	    if (d.presets) {
+	      Object.keys(d.presets).forEach(function (presetID) {
+	        var p = d.presets[presetID];
 
-	    AES.prototype.decrypt = function (ciphertext) {
-	      if (ciphertext.length != 16) {
-	        throw new Error('invalid ciphertext size (must be 16 bytes)');
-	      }
+	        if (p) {
+	          // add or replace
+	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
 
-	      var rounds = this._Kd.length - 1;
-	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
+	          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];
 
-	      var t = convertToInt32(ciphertext);
+	          if (existing && !existing.isFallback()) {
+	            delete _presets[presetID];
+	          }
+	        }
+	      });
+	    } // Merge Categories
 
-	      for (var i = 0; i < 4; i++) {
-	        t[i] ^= this._Kd[0][i];
-	      } // apply round transforms
 
+	    if (d.categories) {
+	      Object.keys(d.categories).forEach(function (categoryID) {
+	        var c = d.categories[categoryID];
 
-	      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];
+	        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
 
-	        t = a.slice();
-	      } // the last round is special
 
+	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
 
-	      var result = createArray(16),
-	          tt;
+	    if (d.defaults) {
+	      Object.keys(d.defaults).forEach(function (geometry) {
+	        var def = d.defaults[geometry];
 
-	      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;
-	      }
+	        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
 
-	      return result;
-	    };
-	    /**
-	     *  Mode Of Operation - Electonic Codebook (ECB)
-	     */
 
+	    _universal = Object.values(_fields).filter(function (field) {
+	      return field.universal;
+	    }); // Reset all the preset fields - they'll need to be resolved again
 
-	    var ModeOfOperationECB = function ModeOfOperationECB(key) {
-	      if (!(this instanceof ModeOfOperationECB)) {
-	        throw Error('AES must be instanitated with `new`');
-	      }
+	    Object.values(_presets).forEach(function (preset) {
+	      return preset.resetFields();
+	    }); // Rebuild geometry index
 
-	      this.description = "Electronic Code Block";
-	      this.name = "ecb";
-	      this._aes = new AES(key);
+	    _geometryIndex = {
+	      point: {},
+	      vertex: {},
+	      line: {},
+	      area: {},
+	      relation: {}
 	    };
 
-	    ModeOfOperationECB.prototype.encrypt = function (plaintext) {
-	      plaintext = coerceArray(plaintext);
+	    _this.collection.forEach(function (preset) {
+	      (preset.geometry || []).forEach(function (geometry) {
+	        var g = _geometryIndex[geometry];
 
-	      if (plaintext.length % 16 !== 0) {
-	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	      }
+	        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
 
-	      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);
-	      }
+	    if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
+	      _mainLocations.mergeCustomGeoJSON(d.featureCollection);
+	    } // Resolve all locationSet features.
 
-	      return ciphertext;
-	    };
 
-	    ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
-	      ciphertext = coerceArray(ciphertext);
+	    if (newLocationSets.length) {
+	      _mainLocations.mergeLocationSets(newLocationSets);
+	    }
 
-	      if (ciphertext.length % 16 !== 0) {
-	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	      }
+	    return _this;
+	  };
 
-	      var plaintext = createArray(ciphertext.length);
-	      var block = createArray(16);
+	  _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
 
-	      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);
+	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+	        geometry = 'point';
 	      }
 
-	      return plaintext;
-	    };
-	    /**
-	     *  Mode Of Operation - Cipher Block Chaining (CBC)
-	     */
+	      var entityExtent = entity.extent(resolver);
+	      return _this.matchTags(entity.tags, geometry, entityExtent.center());
+	    });
+	  };
 
+	  _this.matchTags = function (tags, geometry, loc) {
+	    var keyIndex = _geometryIndex[geometry];
+	    var bestScore = -1;
+	    var bestMatch;
+	    var matchCandidates = [];
 
-	    var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
-	      if (!(this instanceof ModeOfOperationCBC)) {
-	        throw Error('AES must be instanitated with `new`');
-	      }
+	    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;
+	        }
 
-	      this.description = "Cipher Block Chaining";
-	      this.name = "cbc";
+	        matchCandidates.push({
+	          score: score,
+	          candidate: candidate
+	        });
 
-	      if (!iv) {
-	        iv = createArray(16);
-	      } else if (iv.length != 16) {
-	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	        if (score > bestScore) {
+	          bestScore = score;
+	          bestMatch = candidate;
+	        }
 	      }
+	    }
 
-	      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)');
-	      }
+	    if (bestMatch && bestMatch.locationSetID && bestMatch.locationSetID !== '+[Q2]' && Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
 
-	      var ciphertext = createArray(plaintext.length);
-	      var block = createArray(16);
+	      if (!validLocations[bestMatch.locationSetID]) {
+	        matchCandidates.sort(function (a, b) {
+	          return a.score < b.score ? 1 : -1;
+	        });
 
-	      for (var i = 0; i < plaintext.length; i += 16) {
-	        copyArray(plaintext, block, 0, i, i + 16);
+	        for (var _i = 0; _i < matchCandidates.length; _i++) {
+	          var candidateScore = matchCandidates[_i];
 
-	        for (var j = 0; j < 16; j++) {
-	          block[j] ^= this._lastCipherblock[j];
+	          if (!candidateScore.candidate.locationSetID || validLocations[candidateScore.candidate.locationSetID]) {
+	            bestMatch = candidateScore.candidate;
+	            bestScore = candidateScore.score;
+	            break;
+	          }
 	        }
-
-	        this._lastCipherblock = this._aes.encrypt(block);
-	        copyArray(this._lastCipherblock, ciphertext, i);
 	      }
+	    } // If any part of an address is present, allow fallback to "Address" preset - #4353
 
-	      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)');
+	    if (!bestMatch || bestMatch.isFallback()) {
+	      for (var _k in tags) {
+	        if (/^addr:/.test(_k) && keyIndex['addr:*'] && keyIndex['addr:*']['*']) {
+	          bestMatch = keyIndex['addr:*']['*'][0];
+	          break;
+	        }
 	      }
+	    }
 
-	      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];
-	        }
+	    return bestMatch || _this.fallback(geometry);
+	  };
 
-	        copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
-	      }
+	  _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 plaintext;
-	    };
-	    /**
-	     *  Mode Of Operation - Cipher Feedback (CFB)
-	     */
+	      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 ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
-	      if (!(this instanceof ModeOfOperationCFB)) {
-	        throw Error('AES must be instanitated with `new`');
-	      }
+	  _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
 
-	      this.description = "Cipher Feedback";
-	      this.name = "cfb";
+	    var presets = _this.collection.filter(function (p) {
+	      return !p.suggestion && !p.replacement;
+	    }); // keeplist
 
-	      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;
-	      }
+	    presets.forEach(function (p) {
+	      var keys = p.tags && Object.keys(p.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	      this.segmentSize = segmentSize;
-	      this._shiftRegister = coerceArray(iv, true);
-	      this._aes = new AES(key);
-	    };
+	      if (!key) return;
+	      if (ignore.indexOf(key) !== -1) return;
 
-	    ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
-	      if (plaintext.length % this.segmentSize != 0) {
-	        throw new Error('invalid plaintext size (must be segmentSize bytes)');
+	      if (p.geometry.indexOf('area') !== -1) {
+	        // probably an area..
+	        areaKeys[key] = areaKeys[key] || {};
 	      }
+	    }); // discardlist
 
-	      var encrypted = coerceArray(plaintext, true);
-	      var xorSegment;
+	    presets.forEach(function (p) {
+	      var key;
 
-	      for (var i = 0; i < encrypted.length; i += this.segmentSize) {
-	        xorSegment = this._aes.encrypt(this._shiftRegister);
+	      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];
 
-	        for (var j = 0; j < this.segmentSize; j++) {
-	          encrypted[i + j] ^= xorSegment[j];
-	        } // Shift the register
+	        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
 
-	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	        copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-	      }
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	      return encrypted;
-	    };
+	      if (!key) return pointTags; // if this can be a point
 
-	    ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
-	      if (ciphertext.length % this.segmentSize != 0) {
-	        throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+	      if (d.geometry.indexOf('point') !== -1) {
+	        pointTags[key] = pointTags[key] || {};
+	        pointTags[key][d.tags[key]] = true;
 	      }
 
-	      var plaintext = coerceArray(ciphertext, true);
-	      var xorSegment;
+	      return pointTags;
+	    }, {});
+	  };
 
-	      for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-	        xorSegment = this._aes.encrypt(this._shiftRegister);
+	  _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
 
-	        for (var j = 0; j < this.segmentSize; j++) {
-	          plaintext[i + j] ^= xorSegment[j];
-	        } // Shift the register
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
+	      if (!key) return vertexTags; // if this can be a vertex
 
-	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	        copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      if (d.geometry.indexOf('vertex') !== -1) {
+	        vertexTags[key] = vertexTags[key] || {};
+	        vertexTags[key][d.tags[key]] = true;
 	      }
 
-	      return plaintext;
-	    };
-	    /**
-	     *  Mode Of Operation - Output Feedback (OFB)
-	     */
-
+	      return vertexTags;
+	    }, {});
+	  };
 
-	    var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
-	      if (!(this instanceof ModeOfOperationOFB)) {
-	        throw Error('AES must be instanitated with `new`');
-	      }
+	  _this.field = function (id) {
+	    return _fields[id];
+	  };
 
-	      this.description = "Output Feedback";
-	      this.name = "ofb";
+	  _this.universal = function () {
+	    return _universal;
+	  };
 
-	      if (!iv) {
-	        iv = createArray(16);
-	      } else if (iv.length != 16) {
-	        throw new Error('invalid initialation vector size (must be 16 bytes)');
-	      }
+	  _this.defaults = function (geometry, n, startWithRecents, loc) {
+	    var recents = [];
 
-	      this._lastPrecipher = coerceArray(iv, true);
-	      this._lastPrecipherIndex = 16;
-	      this._aes = new AES(key);
-	    };
+	    if (startWithRecents) {
+	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
+	    }
 
-	    ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
-	      var encrypted = coerceArray(plaintext, true);
+	    var defaults;
 
-	      for (var i = 0; i < encrypted.length; i++) {
-	        if (this._lastPrecipherIndex === 16) {
-	          this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-	          this._lastPrecipherIndex = 0;
-	        }
+	    if (_addablePresetIDs) {
+	      defaults = Array.from(_addablePresetIDs).map(function (id) {
+	        var preset = _this.item(id);
 
-	        encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-	      }
+	        if (preset && preset.matchGeometry(geometry)) return preset;
+	        return null;
+	      }).filter(Boolean);
+	    } else {
+	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+	    }
 
-	      return encrypted;
-	    }; // Decryption is symetric
+	    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];
+	      });
+	    }
 
-	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-	    /**
-	     *  Counter object for CTR common mode of operation
-	     */
+	    return result;
+	  }; // pass a Set of addable preset ids
 
-	    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
 
+	  _this.addablePresetIDs = function (val) {
+	    if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
 
-	      if (initialValue !== 0 && !initialValue) {
-	        initialValue = 1;
-	      }
+	    if (Array.isArray(val)) val = new Set(val);
+	    _addablePresetIDs = val;
 
-	      if (typeof initialValue === 'number') {
-	        this._counter = createArray(16);
-	        this.setValue(initialValue);
-	      } else {
-	        this.setBytes(initialValue);
-	      }
-	    };
+	    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);
+	      });
+	    }
 
-	    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
+	    return _this;
+	  };
 
+	  _this.recent = function () {
+	    return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+	      return d.preset;
+	    })));
+	  };
 
-	      if (value > Number.MAX_SAFE_INTEGER) {
-	        throw new Error('integer value out of safe range');
-	      }
+	  function RibbonItem(preset, source) {
+	    var item = {};
+	    item.preset = preset;
+	    item.source = source;
 
-	      for (var index = 15; index >= 0; --index) {
-	        this._counter[index] = value % 256;
-	        value = parseInt(value / 256);
-	      }
+	    item.isFavorite = function () {
+	      return item.source === 'favorite';
 	    };
 
-	    Counter.prototype.setBytes = function (bytes) {
-	      bytes = coerceArray(bytes, true);
-
-	      if (bytes.length != 16) {
-	        throw new Error('invalid counter bytes size (must be 16 bytes)');
-	      }
+	    item.isRecent = function () {
+	      return item.source === 'recent';
+	    };
 
-	      this._counter = bytes;
+	    item.matches = function (preset) {
+	      return item.preset.id === preset.id;
 	    };
 
-	    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;
-	        }
-	      }
+	    item.minified = function () {
+	      return {
+	        pID: item.preset.id
+	      };
 	    };
-	    /**
-	     *  Mode Of Operation - Counter (CTR)
-	     */
 
+	    return item;
+	  }
 
-	    var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
-	      if (!(this instanceof ModeOfOperationCTR)) {
-	        throw Error('AES must be instanitated with `new`');
-	      }
+	  function ribbonItemForMinified(d, source) {
+	    if (d && d.pID) {
+	      var preset = _this.item(d.pID);
 
-	      this.description = "Counter";
-	      this.name = "ctr";
+	      if (!preset) return null;
+	      return RibbonItem(preset, source);
+	    }
 
-	      if (!(counter instanceof Counter)) {
-	        counter = new Counter(counter);
-	      }
+	    return null;
+	  }
 
-	      this._counter = counter;
-	      this._remainingCounter = null;
-	      this._remainingCounterIndex = 16;
-	      this._aes = new AES(key);
-	    };
+	  _this.getGenericRibbonItems = function () {
+	    return ['point', 'line', 'area'].map(function (id) {
+	      return RibbonItem(_this.item(id), 'generic');
+	    });
+	  };
 
-	    ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
-	      var encrypted = coerceArray(plaintext, true);
+	  _this.getAddable = function () {
+	    if (!_addablePresetIDs) return [];
+	    return _addablePresetIDs.map(function (id) {
+	      var preset = _this.item(id);
 
-	      for (var i = 0; i < encrypted.length; i++) {
-	        if (this._remainingCounterIndex === 16) {
-	          this._remainingCounter = this._aes.encrypt(this._counter._counter);
-	          this._remainingCounterIndex = 0;
+	      if (preset) return RibbonItem(preset, 'addable');
+	      return null;
+	    }).filter(Boolean);
+	  };
 
-	          this._counter.increment();
-	        }
+	  function setRecents(items) {
+	    _recents = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
+	    dispatch.call('recentsChange');
+	  }
 
-	        encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-	      }
+	  _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 encrypted;
-	    }; // Decryption is symetric
+	    return _recents;
+	  };
 
+	  _this.addRecent = function (preset, besidePreset, after) {
+	    var recents = _this.getRecents();
 
-	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
-	    // Padding
-	    // See:https://tools.ietf.org/html/rfc2315
+	    var beforeItem = _this.recentMatching(besidePreset);
 
-	    function pkcs7pad(data) {
-	      data = coerceArray(data, true);
-	      var padder = 16 - data.length % 16;
-	      var result = createArray(data.length + padder);
-	      copyArray(data, result);
+	    var toIndex = recents.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'recent');
+	    recents.splice(toIndex, 0, newItem);
+	    setRecents(recents);
+	  };
 
-	      for (var i = data.length; i < result.length; i++) {
-	        result[i] = padder;
-	      }
+	  _this.removeRecent = function (preset) {
+	    var item = _this.recentMatching(preset);
 
-	      return result;
+	    if (item) {
+	      var items = _this.getRecents();
+
+	      items.splice(items.indexOf(item), 1);
+	      setRecents(items);
 	    }
+	  };
 
-	    function pkcs7strip(data) {
-	      data = coerceArray(data, true);
+	  _this.recentMatching = function (preset) {
+	    var items = _this.getRecents();
 
-	      if (data.length < 16) {
-	        throw new Error('PKCS#7 invalid length');
+	    for (var i in items) {
+	      if (items[i].matches(preset)) {
+	        return items[i];
 	      }
+	    }
 
-	      var padder = data[data.length - 1];
+	    return null;
+	  };
 
-	      if (padder > 16) {
-	        throw new Error('PKCS#7 padding byte out of range');
-	      }
+	  _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;
+	  };
 
-	      var length = data.length - padder;
+	  _this.moveRecent = function (item, beforeItem) {
+	    var recents = _this.getRecents();
 
-	      for (var i = 0; i < padder; i++) {
-	        if (data[length + i] !== padder) {
-	          throw new Error('PKCS#7 invalid padding byte');
-	        }
-	      }
+	    var fromIndex = recents.indexOf(item);
+	    var toIndex = recents.indexOf(beforeItem);
 
-	      var result = createArray(length);
-	      copyArray(data, result, 0, 0, length);
-	      return result;
-	    } ///////////////////////
-	    // Exporting
-	    // The block cipher
+	    var items = _this.moveItem(recents, fromIndex, toIndex);
 
+	    if (items) setRecents(items);
+	  };
 
-	    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
+	  _this.setMostRecent = function (preset) {
+	    if (preset.searchable === false) return;
 
-	    {
-	      module.exports = aesjs; // RequireJS/AMD
-	      // http://www.requirejs.org/docs/api.html
-	      // https://github.com/amdjs/amdjs-api/wiki/AMD
-	    }
-	  })();
-	});
+	    var items = _this.getRecents();
 
-	// 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 item = _this.recentMatching(preset);
 
-	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;
-	}
+	    if (item) {
+	      items.splice(items.indexOf(item), 1);
+	    } else {
+	      item = RibbonItem(preset, 'recent');
+	    } // remove the last recent (first in, first out)
 
-	function utilCleanTags(tags) {
-	  var out = {};
 
-	  for (var k in tags) {
-	    if (!k) continue;
-	    var v = tags[k];
+	    while (items.length >= MAXRECENTS) {
+	      items.pop();
+	    } // prepend array
 
-	    if (v !== undefined) {
-	      out[k] = cleanValue(k, v);
-	    }
-	  }
 
-	  return out;
+	    items.unshift(item);
+	    setRecents(items);
+	  };
 
-	  function cleanValue(k, v) {
-	    function keepSpaces(k) {
-	      return /_hours|_times|:conditional$/.test(k);
-	    }
+	  function setFavorites(items) {
+	    _favorites = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
-	    function skip(k) {
-	      return /^(description|note|fixme)$/.test(k);
-	    }
+	    dispatch.call('favoritePreset');
+	  }
 
-	    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
+	  _this.addFavorite = function (preset, besidePreset, after) {
+	    var favorites = _this.getFavorites();
 
-	    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
-	    }
+	    var beforeItem = _this.favoriteMatching(besidePreset);
 
-	    return cleaned;
-	  }
-	}
+	    var toIndex = favorites.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'favorite');
+	    favorites.splice(toIndex, 0, newItem);
+	    setFavorites(favorites);
+	  };
 
-	// 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;
-	    }
+	  _this.toggleFavorite = function (preset) {
+	    var favs = _this.getFavorites();
 
-	    function valueConstant() {
-	      if (this.value !== value) {
-	        this.value = value;
-	      }
-	    }
+	    var favorite = _this.favoriteMatching(preset);
 
-	    function valueFunction() {
-	      var x = value.apply(this, arguments);
+	    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
 
-	      if (x === null || x === undefined) {
-	        delete this.value;
-	      } else if (this.value !== x) {
-	        this.value = x;
-	      }
+
+	      favs.push(RibbonItem(preset, 'favorite'));
 	    }
 
-	    return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
-	  }
+	    setFavorites(favs);
+	  };
 
-	  if (arguments.length === 1) {
-	    return selection.property('value');
-	  }
+	  _this.removeFavorite = function (preset) {
+	    var item = _this.favoriteMatching(preset);
 
-	  return selection.each(d3_selection_value(value));
-	}
+	    if (item) {
+	      var items = _this.getFavorites();
 
-	function utilKeybinding(namespace) {
-	  var _keybindings = {};
+	      items.splice(items.indexOf(item), 1);
+	      setFavorites(items);
+	    }
+	  };
 
-	  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
+	  _this.getFavorites = function () {
+	    if (!_favorites) {
+	      // fetch from local storage
+	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
 
-	    for (i = 0; i < bindings.length; i++) {
-	      binding = bindings[i];
-	      if (!binding.event.modifiers.shiftKey) continue; // no shift
+	      if (!rawFavorites) {
+	        rawFavorites = [];
+	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	      }
 
-	      if (!!binding.capture !== isCapturing) continue;
+	      _favorites = rawFavorites.reduce(function (output, d) {
+	        var item = ribbonItemForMinified(d, 'favorite');
+	        if (item && item.preset.addable()) output.push(item);
+	        return output;
+	      }, []);
+	    }
 
-	      if (matches(d3_event, binding, true)) {
-	        binding.callback(d3_event);
-	        didMatch = true; // match a max of one binding per event
+	    return _favorites;
+	  };
 
-	        break;
+	  _this.favoriteMatching = function (preset) {
+	    var favs = _this.getFavorites();
+
+	    for (var index in favs) {
+	      if (favs[index].matches(preset)) {
+	        return favs[index];
 	      }
 	    }
 
-	    if (didMatch) return; // then unshifted keybindings
+	    return null;
+	  };
 
-	    for (i = 0; i < bindings.length; i++) {
-	      binding = bindings[i];
-	      if (binding.event.modifiers.shiftKey) continue; // shift
+	  return utilRebind(_this, dispatch, 'on');
+	}
 
-	      if (!!binding.capture !== isCapturing) continue;
+	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;
 
-	      if (matches(d3_event, binding, false)) {
-	        binding.callback(d3_event);
-	        break;
-	      }
-	    }
+	  for (var i = 0; i < array.length; i++) {
+	    val = array[i];
+	    entity = typeof val === 'string' ? graph.hasEntity(val) : val;
 
-	    function matches(d3_event, binding, testShift) {
-	      var event = d3_event;
-	      var isMatch = false;
-	      var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
+	    if (entity) {
+	      extent._extend(entity.extent(graph));
+	    }
+	  }
 
-	      if (event.key !== undefined) {
-	        tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
+	  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];
 
-	        isMatch = true;
+	    if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '-',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '- ' + k + '=' + oldVal
+	      });
+	    }
 
-	        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 {
-	          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 ((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));
 
-	      if (!isMatch && tryKeyCode) {
-	        isMatch = event.keyCode === binding.event.keyCode;
-	      }
+	  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 (!isMatch) return false; // test modifier keys
+	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
 
-	      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;
-	      }
+	function utilEntityAndDeepMemberIDs(ids, graph) {
+	  var seen = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return Array.from(seen);
 
-	      if (event.metaKey !== binding.event.modifiers.metaKey) return false;
-	      if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
-	      return true;
-	    }
+	  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 capture(d3_event) {
-	    testBindings(d3_event, true);
-	  }
+	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 bubble(d3_event) {
-	    var tagName = select(d3_event.target).node().tagName;
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
 
-	    if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-	      return;
+	    if (!idsSet.has(id)) {
+	      returners.add(id);
 	    }
 
-	    testBindings(d3_event, false);
+	    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 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 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
 
-	  keybinding.unbind = function (selection) {
-	    _keybindings = [];
-	    selection = selection || select(document);
-	    selection.on('keydown.capture.' + namespace, null);
-	    selection.on('keydown.bubble.' + namespace, null);
-	    return keybinding;
-	  };
+	function utilGetAllNodes(ids, graph) {
+	  var seen = new Set();
+	  var nodes = new Set();
+	  ids.forEach(collectNodes);
+	  return Array.from(nodes);
 
-	  keybinding.clear = function () {
-	    _keybindings = {};
-	    return keybinding;
-	  }; // Remove one or more keycode bindings.
+	  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 = [];
 
-	  keybinding.off = function (codes, capture) {
-	    var arr = utilArrayUniq([].concat(codes));
+	  if (tags.network) {
+	    keyComponents.push('network');
+	  }
 
-	    for (var i = 0; i < arr.length; i++) {
-	      var id = arr[i] + (capture ? '-capture' : '-bubble');
-	      delete _keybindings[id];
-	    }
+	  if (tags.ref) {
+	    keyComponents.push('ref');
+	  } // Routes may need more disambiguation based on direction or destination
 
-	    return keybinding;
-	  }; // Add one or more keycode bindings.
 
+	  if (entity.tags.route) {
+	    if (tags.direction) {
+	      keyComponents.push('direction');
+	    } else if (tags.from && tags.to) {
+	      keyComponents.push('from');
+	      keyComponents.push('to');
 
-	  keybinding.on = function (codes, callback, capture) {
-	    if (typeof callback !== 'function') {
-	      return keybinding.off(codes, capture);
+	      if (tags.via) {
+	        keyComponents.push('via');
+	      }
 	    }
+	  }
 
-	    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 (keyComponents.length) {
+	    name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
+	  }
 
-	      if (_keybindings[id]) {
-	        console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
-	      }
+	  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;
 
-	      _keybindings[id] = binding;
-	      var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
+	  if (!isFirefox && !isNewChromium && name && rtlRegex.test(name)) {
+	    name = fixRTLTextForSvg(name);
+	  }
 
-	      for (var j = 0; j < matches.length; j++) {
-	        // Normalise matching errors
-	        if (matches[j] === '++') matches[j] = '+';
+	  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"
+	//
 
-	        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];
+	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());
 
-	          if (matches[j] in utilKeybinding.keyCodes) {
-	            binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
-	          }
-	        }
-	      }
-	    }
+	  if (verbose) {
+	    result = [presetName, displayName].filter(Boolean).join(' ');
+	  } else {
+	    result = displayName || presetName;
+	  } // Fallback to the OSM type (node/way/relation)
 
-	    return keybinding;
-	  };
 
-	  return keybinding;
+	  return result || utilDisplayType(entity.id);
 	}
-	/*
-	 * 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,
-	  // 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
+	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 i$1 = 95,
-	    n = 0;
+	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
 
-	while (++i$1 < 106) {
-	  utilKeybinding.keyCodes['num-' + n] = i$1;
-	  ++n;
-	} // 0-9
+	  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);
+	          }
+	        }
+	      }
 
-	i$1 = 47;
-	n = 0;
+	      var tagHash = key + '=' + value;
+	      if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+	      tagCounts[tagHash] += 1;
+	    });
+	  });
 
-	while (++i$1 < 58) {
-	  utilKeybinding.keyCodes[n] = i$1;
-	  ++n;
-	} // F1-F25
+	  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
 
-	i$1 = 111;
-	n = 1;
+	      var count2 = tagCounts[key + '=' + val2];
+	      var count1 = tagCounts[key + '=' + val1];
 
-	while (++i$1 < 136) {
-	  utilKeybinding.keyCodes['f' + n] = i$1;
-	  ++n;
-	} // a-z
+	      if (count2 !== count1) {
+	        return count2 - count1;
+	      }
 
+	      if (val2 && val1) {
+	        return val1.localeCompare(val2);
+	      }
 
-	i$1 = 64;
+	      return val1 ? 1 : -1;
+	    });
+	  }
 
-	while (++i$1 < 91) {
-	  utilKeybinding.keyCodes[String.fromCharCode(i$1).toLowerCase()] = i$1;
+	  return tags;
 	}
+	function utilStringQs(str) {
+	  var i = 0; // advance past any leading '?' or '#' characters
 
-	function utilObjectOmit(obj, omitKeys) {
-	  return Object.keys(obj).reduce(function (result, key) {
-	    if (omitKeys.indexOf(key) === -1) {
-	      result[key] = obj[key]; // keep
+	  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 result;
+	    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);
+	  }
 
-	// Copies a variable number of methods from source to target.
-	function utilRebind(target, source) {
-	  var i = 1,
-	      n = arguments.length,
-	      method;
+	  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) {
-	    target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+	    if (prefixes[i] + property in s) {
+	      return prefixes[i] + property;
+	    }
 	  }
 
-	  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.
+	  return false;
+	}
+	function utilPrefixCSSProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body.style;
 
-	function d3_rebind(target, source, method) {
-	  return function () {
-	    var value = method.apply(source, arguments);
-	    return value === source ? target : value;
-	  };
+	  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.
 
-	// 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 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;
 
-	  function renew() {
-	    var expires = new Date();
-	    expires.setSeconds(expires.getSeconds() + 5);
-	    document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+	  for (i = 0; i <= b.length; i++) {
+	    matrix[i] = [i];
 	  }
 
-	  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;
-	  };
+	  for (j = 0; j <= a.length; j++) {
+	    matrix[0][j] = j;
+	  }
 
-	  mutex.unlock = function () {
-	    if (!intervalID) return;
-	    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-	    clearInterval(intervalID);
-	    intervalID = null;
-	  };
+	  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
+	      }
+	    }
+	  }
 
-	  mutex.locked = function () {
-	    return !!intervalID;
+	  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]
 
-	  return mutex;
+	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 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 utilHashcode(str) {
+	  var hash = 0;
 
-	  function clamp(num, min, max) {
-	    return Math.max(min, Math.min(num, max));
+	  if (str.length === 0) {
+	    return hash;
 	  }
 
-	  function nearNullIsland(tile) {
-	    var x = tile[0];
-	    var y = tile[1];
-	    var z = tile[2];
+	  for (var i = 0; i < str.length; i++) {
+	    var _char = str.charCodeAt(i);
 
-	    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;
-	    }
+	    hash = (hash << 5) - hash + _char;
+	    hash = hash & hash; // Convert to 32bit integer
+	  }
 
-	    return false;
+	  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 toNumericID(id) {
+	  var match = id.match(/^[cnwr](-?\d+)$/);
+
+	  if (match) {
+	    return parseInt(match[1], 10);
 	  }
 
-	  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(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
-	    var rows = range(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
-	    var tiles = [];
+	  return NaN;
+	}
 
-	    for (var i = 0; i < rows.length; i++) {
-	      var y = rows[i];
+	function compareNumericIDs(left, right) {
+	  if (isNaN(left) && isNaN(right)) return -1;
+	  if (isNaN(left)) return 1;
+	  if (isNaN(right)) return -1;
+	  if (Math.sign(left) !== Math.sign(right)) return -Math.sign(left);
+	  if (Math.sign(left) < 0) return Math.sign(right - left);
+	  return Math.sign(left - right);
+	} // Returns -1 if the first parameter ID is older than the second,
+	// 1 if the second parameter is older, 0 if they are the same.
+	// If both IDs are test IDs, the function returns -1.
 
-	      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
-	        }
-	      }
-	    }
+	function utilCompareIDs(left, right) {
+	  return compareNumericIDs(toNumericID(left), toNumericID(right));
+	} // Returns the chronologically oldest ID in the list.
+	// Database IDs (with positive numbers) before editor ones (with negative numbers).
+	// Among each category, the closest number to 0 is the oldest.
+	// Test IDs (any string that does not conform to OSM's ID scheme) are taken last.
 
-	    tiles.translate = origin;
-	    tiles.scale = k;
-	    return tiles;
+	function utilOldestID(ids) {
+	  if (ids.length === 0) {
+	    return undefined;
 	  }
-	  /**
-	   * getTiles() returns an array of tiles that cover the map view
-	   */
 
+	  var oldestIDIndex = 0;
+	  var oldestID = toNumericID(ids[0]);
 
-	  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 (var i = 1; i < ids.length; i++) {
+	    var num = toNumericID(ids[i]);
 
-	      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
-	   */
+	    if (compareNumericIDs(oldestID, num) === 1) {
+	      oldestIDIndex = i;
+	      oldestID = num;
+	    }
+	  }
 
+	  return ids[oldestIDIndex];
+	}
 
-	  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
-	    };
-	  };
+	function osmEntity(attrs) {
+	  // For prototypal inheritance.
+	  if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-	  tiler.tileSize = function (val) {
-	    if (!arguments.length) return _tileSize;
-	    _tileSize = val;
-	    return tiler;
-	  };
+	  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).
 
-	  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;
-	  };
+	  return new osmEntity().initialize(arguments);
+	}
 
-	  tiler.scale = function (val) {
-	    if (!arguments.length) return _scale;
-	    _scale = val;
-	    return tiler;
-	  };
+	osmEntity.id = function (type) {
+	  return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+	};
 
-	  tiler.translate = function (val) {
-	    if (!arguments.length) return _translate;
-	    _translate = val;
-	    return tiler;
-	  }; // number to extend the rows/columns beyond those covering the viewport
+	osmEntity.id.next = {
+	  changeset: -1,
+	  node: -1,
+	  way: -1,
+	  relation: -1
+	};
 
+	osmEntity.id.fromOSM = function (type, id) {
+	  return type[0] + id;
+	};
 
-	  tiler.margin = function (val) {
-	    if (!arguments.length) return _margin;
-	    _margin = +val;
-	    return tiler;
-	  };
+	osmEntity.id.toOSM = function (id) {
+	  var match = id.match(/^[cnwr](-?\d+)$/);
 
-	  tiler.skipNullIsland = function (val) {
-	    if (!arguments.length) return _skipNullIsland;
-	    _skipNullIsland = val;
-	    return tiler;
-	  };
+	  if (match) {
+	    return match[1];
+	  }
 
-	  return tiler;
-	}
+	  return '';
+	};
 
-	function utilTriggerEvent(target, type) {
-	  target.each(function () {
-	    var evt = document.createEvent('HTMLEvents');
-	    evt.initEvent(type, true, true);
-	    this.dispatchEvent(evt);
-	  });
-	}
+	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().
 
-	var _mainLocalizer = coreLocalizer(); // singleton
 
+	osmEntity.key = function (entity) {
+	  return entity.id + 'v' + (entity.v || 0);
+	};
 
-	var _t = _mainLocalizer.t;
-	// coreLocalizer manages language and locale parameters including translated strings
-	//
+	var _deprecatedTagValuesByKey;
 
-	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: {…} },
-	  // …
-	  // }
+	osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+	  if (!_deprecatedTagValuesByKey) {
+	    _deprecatedTagValuesByKey = {};
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
 
-	  var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-	  // {
-	  // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	  // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	  // …
-	  // }
+	      if (oldKeys.length === 1) {
+	        var oldKey = oldKeys[0];
+	        var oldValue = d.old[oldKey];
 
-	  var _localeStrings = {}; // the current locale
+	        if (oldValue !== '*') {
+	          if (!_deprecatedTagValuesByKey[oldKey]) {
+	            _deprecatedTagValuesByKey[oldKey] = [oldValue];
+	          } else {
+	            _deprecatedTagValuesByKey[oldKey].push(oldValue);
+	          }
+	        }
+	      }
+	    });
+	  }
 
-	  var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
+	  return _deprecatedTagValuesByKey;
+	};
 
-	  var _localeCodes = ['en-US', 'en'];
-	  var _languageCode = 'en';
-	  var _textDirection = 'ltr';
-	  var _usesMetric = false;
-	  var _languageNames = {};
-	  var _scriptNames = {}; // getters for the current locale parameters
+	osmEntity.prototype = {
+	  tags: {},
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
 
-	  localizer.localeCode = function () {
-	    return _localeCode;
-	  };
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
+	      }
+	    }
 
-	  localizer.localeCodes = function () {
-	    return _localeCodes;
-	  };
+	    if (!this.id && this.type) {
+	      this.id = osmEntity.id(this.type);
+	    }
 
-	  localizer.languageCode = function () {
-	    return _languageCode;
-	  };
+	    if (!this.hasOwnProperty('visible')) {
+	      this.visible = true;
+	    }
 
-	  localizer.textDirection = function () {
-	    return _textDirection;
-	  };
+	    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);
+	    }
 
-	  localizer.usesMetric = function () {
-	    return _usesMetric;
-	  };
+	    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() {
+	    var osmId = osmEntity.id.toOSM(this.id);
+	    return osmId.length === 0 || 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
 
-	  localizer.languageNames = function () {
-	    return _languageNames;
-	  };
+	    var changed = false;
 
-	  localizer.scriptNames = function () {
-	    return _scriptNames;
-	  }; // The client app may want to manually set the locale, regardless of the
-	  // settings provided by the browser
+	    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()
+	        );
+	      }
+	    }
 
-	  var _preferredLocaleCodes = [];
+	    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
 
-	  localizer.preferredLocaleCodes = function (codes) {
-	    if (!arguments.length) return _preferredLocaleCodes;
+	    if (Object.keys(tags).length === 0) return [];
+	    var deprecated = [];
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
 
-	    if (typeof codes === 'string') {
-	      // be generous and accept delimited strings as input
-	      _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-	    } else {
-	      _preferredLocaleCodes = codes;
-	    }
+	      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
 
-	    return localizer;
-	  };
+	        if (hasExistingValues) return;
+	      }
 
-	  var _loadPromise;
+	      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);
 
-	  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) // fallback to English since it's the only guaranteed complete language
-	      .concat(['en']);
+	        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;
+	            }
+	          }
+	        }
 
-	      _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
+	        return false;
+	      });
 
-	      _localeCode = _localeCodes[0]; // Will always return the index for `en` if nothing else
+	      if (matchesDeprecatedTags) {
+	        deprecated.push(d);
+	      }
+	    });
+	    return deprecated;
+	  }
+	};
 
-	      var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
-	        return _dataLocales[locale].pct === 1;
-	      }); // We only need to load locales up until we find one with full coverage
+	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
 
-	      var loadStringsPromises = _localeCodes.slice(0, fullCoverageIndex + 1).map(function (code) {
-	        return localizer.loadLocale(code);
-	      });
+	  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
+	  };
+	}
 
-	      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 getLaneCount(tags, isOneWay) {
+	  var count;
 
+	  if (tags.lanes) {
+	    count = parseInt(tags.lanes, 10);
 
-	  function localesToUseFrom(requestedLocales) {
-	    var supportedLocales = _dataLocales;
-	    var toUse = [];
+	    if (count > 0) {
+	      return count;
+	    }
+	  }
 
-	    for (var i in requestedLocales) {
-	      var locale = requestedLocales[i];
-	      if (supportedLocales[locale]) toUse.push(locale);
+	  switch (tags.highway) {
+	    case 'trunk':
+	    case 'motorway':
+	      count = isOneWay ? 2 : 4;
+	      break;
 
-	      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
+	    default:
+	      count = isOneWay ? 1 : 2;
+	      break;
+	  }
 
+	  return count;
+	}
 
-	    return utilArrayUniq(toUse);
-	  }
+	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 updateForCurrentLocale() {
-	    if (!_localeCode) return;
-	    _languageCode = _localeCode.split('-')[0];
-	    var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-	    var hash = utilStringQs(window.location.hash);
+	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 (hash.rtl === 'true') {
-	      _textDirection = 'rtl';
-	    } else if (hash.rtl === 'false') {
-	      _textDirection = 'ltr';
-	    } else {
-	      _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+	  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;
 	    }
 
-	    var locale = _localeCode;
-	    if (locale.toLowerCase() === 'en-us') locale = 'en';
-	    _languageNames = _localeStrings[locale].languageNames;
-	    _scriptNames = _localeStrings[locale].scriptNames;
-	    _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(backward)) {
+	    if (forward > laneCount - bothways) {
+	      forward = laneCount - bothways;
+	    }
+
+	    backward = laneCount - bothways - forward;
 	  }
-	  /* Locales */
-	  // Returns a Promise to load the strings for the requested locale
 
+	  return {
+	    forward: forward,
+	    backward: backward,
+	    bothways: bothways
+	  };
+	}
 
-	  localizer.loadLocale = function (requested) {
-	    if (!_dataLocales) {
-	      return Promise.reject('loadLocale called before init');
-	    }
+	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 locale = requested; // US English is the default
+	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;
+	  });
+	}
 
-	    if (locale.toLowerCase() === 'en-us') locale = 'en';
+	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;
+	  });
+	}
 
-	    if (!_dataLocales[locale]) {
-	      return Promise.reject("Unsupported locale: ".concat(requested));
-	    }
+	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;
+	  });
+	}
 
-	    if (_localeStrings[locale]) {
-	      // already loaded
-	      return Promise.resolve(locale);
-	    }
+	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;
+	    });
+	  }
 
-	    var fileMap = _mainFileFetcher.fileMap();
-	    var key = "locale_".concat(locale);
-	    fileMap[key] = "locales/".concat(locale, ".json");
-	    return _mainFileFetcher.get(key).then(function (d) {
-	      _localeStrings[locale] = d[locale];
-	      return locale;
+	  if (data.backward) {
+	    data.backward.forEach(function (l, i) {
+	      if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+	      lanesObj.backward[i][key] = l;
 	    });
-	  };
+	  }
 
-	  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`
+	  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 pluralRule(number, localeCode) {
-	    // modern browsers have this functionality built-in
-	    var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
+	      for (var i = 0; i < this.nodes.length; i++) {
+	        var node = resolver.hasEntity(this.nodes[i]);
 
-	    if (rules) {
-	      return rules.select(number);
-	    } // fallback to basic one/other, as in English
+	        if (node) {
+	          extent._extend(node.extent());
+	        }
+	      }
 
+	      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 (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
-	  */
 
+	    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
+	      }
+	    };
 
-	  localizer.tInfo = function (stringId, replacements, locale) {
-	    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
+	    for (var key in averageWidths) {
+	      if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+	        var width = averageWidths[key][this.tags[key]];
 
-	    if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
-	    var result = _localeStrings[stringsKey];
+	        if (key === 'highway') {
+	          var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+	          if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+	          return width * laneCount;
+	        }
 
-	    while (result !== undefined && path.length) {
-	      result = result[path.pop()];
+	        return width;
+	      }
 	    }
 
-	    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';
-	          });
+	    return null;
+	  },
+	  isOneWay: function isOneWay() {
+	    // explicit oneway tag..
+	    var values = {
+	      'yes': true,
+	      '1': true,
+	      '-1': true,
+	      'reversible': true,
+	      'alternating': true,
+	      'no': false,
+	      '0': false
+	    };
 
-	          if (number !== undefined) {
-	            var rule = pluralRule(number, locale);
+	    if (values[this.tags.oneway] !== undefined) {
+	      return values[this.tags.oneway];
+	    } // implied oneway tag..
 
-	            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];
-	            }
-	          }
-	        }
 
-	        if (typeof result === 'string') {
-	          for (var key in replacements) {
-	            var value = replacements[key];
+	    for (var key in this.tags) {
+	      if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+	        return true;
+	      }
+	    }
 
-	            if (typeof value === 'number' && value.toLocaleString) {
-	              // format numbers for the locale
-	              value = value.toLocaleString(locale, {
-	                style: 'decimal',
-	                useGrouping: true,
-	                minimumFractionDigits: 0
-	              });
-	            }
+	    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];
 
-	            var token = "{".concat(key, "}");
-	            var regex = new RegExp(token, 'g');
-	            result = result.replace(regex, value);
-	          }
+	      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];
 	        }
 	      }
-
-	      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
-
-
-	    var index = _localeCodes.indexOf(locale);
-
-	    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(stringId, replacements, fallback);
 	    }
 
-	    if (replacements && 'default' in replacements) {
-	      // Fallback to a default value if one is specified in `replacements`
-	      return {
-	        text: replacements["default"],
-	        locale: null
-	      };
+	    return null;
+	  },
+	  isSided: function isSided() {
+	    if (this.tags.two_sided === 'yes') {
+	      return false;
 	    }
 
-	    var missing = "Missing ".concat(locale, " translation: ").concat(stringId);
-	    if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
-
-	    return {
-	      text: missing,
-	      locale: 'en'
-	    };
-	  }; // Returns only the localized text, discarding the locale info
-
-
-	  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
-
-
-	  localizer.t.html = function (stringId, replacements, locale) {
-	    var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
-
-	    return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
-	  };
-
-	  localizer.htmlForLocalizedText = function (text, localeCode) {
-	    return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
-	  };
-
-	  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
-
+	    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;
 
-	    if (options && options.localOnly) return null;
-	    var langInfo = _dataLanguages[code];
+	    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 (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 (curr === 0) {
+	        continue;
+	      } else if (prev && curr !== prev) {
+	        return false;
+	      }
 
-	        if (_languageNames[base]) {
-	          // base language name in locale language
-	          var scriptCode = langInfo.script;
-	          var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
+	      prev = curr;
+	    }
 
-	          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 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;
 	      }
 	    }
 
-	    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
-	//
+	    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])]]);
+	    }
 
-	function presetCollection(collection) {
-	  var MAXRESULTS = 50;
-	  var _this = {};
-	  var _memo = {};
-	  _this.collection = collection;
+	    return graph["transient"](this, 'segments', function () {
+	      var segments = [];
 
-	  _this.item = function (id) {
-	    if (_memo[id]) return _memo[id];
+	      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
+	        });
+	      }
 
-	    var found = _this.collection.find(function (d) {
-	      return d.id === id;
+	      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..
 
-	    if (found) _memo[id] = found;
-	    return found;
-	  };
+	    while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	      nodes.splice(i, 1);
+	      i = nodes.length - 1;
+	    }
 
-	  _this.index = function (id) {
-	    return _this.collection.findIndex(function (d) {
-	      return d.id === id;
+	    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;
 
-	  _this.matchGeometry = function (geometry) {
-	    return presetCollection(_this.collection.filter(function (d) {
-	      return d.matchGeometry(geometry);
-	    }));
-	  };
+	    if (index === undefined) {
+	      index = max;
+	    }
 
-	  _this.matchAllGeometry = function (geometries) {
-	    return presetCollection(_this.collection.filter(function (d) {
-	      return d && d.matchAllGeometry(geometries);
-	    }));
-	  };
+	    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..
 
-	  _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);
-	  };
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	  _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")
+	      var i = 1;
 
-	    function leading(a) {
-	      var index = a.indexOf(value);
-	      return index === 0 || a[index - 1] === ' ';
-	    } // match at name beginning only
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
 
-	    function leadingStrict(a) {
-	      var index = a.indexOf(value);
-	      return index === 0;
+	      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;
+	      }
 	    }
 
-	    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
+	    nodes.splice(index, 0, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	      if (value === aCompare) return -1;
-	      if (value === bCompare) return 1; // priority for higher matchScore
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	      var i = b.originalScore - a.originalScore;
-	      if (i !== 0) return i; // priority if search string appears earlier in preset name
+	    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;
 
-	      i = aCompare.indexOf(value) - bCompare.indexOf(value);
-	      if (i !== 0) return i; // priority for shorter preset names
+	    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..
 
-	      return aCompare.length - bCompare.length;
-	    }
 
-	    var pool = _this.collection;
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	    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 i = 1;
 
-	    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
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	    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
+	      i = nodes.length - 1;
 
-	    var leading_terms = searchable.filter(function (a) {
-	      return (a.terms() || []).some(leading);
-	    }); // matches value to preset.tags values
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index === i) index = 0; // update leading connector instead
 
-	    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
+	        i = nodes.length - 1;
+	      }
+	    }
 
-	    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)
+	    nodes.splice(index, 1, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	    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
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	    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;
-	      });
+	    return this.update({
+	      nodes: nodes
 	    });
-	    var results = leading_name.concat(leading_suggestions, leading_terms, leading_tag_values, similar_name, similar_suggestions, similar_terms).slice(0, MAXRESULTS - 1);
+	  },
+	  // 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();
 
-	    if (geometry) {
-	      if (typeof geometry === 'string') {
-	        results.push(_this.fallback(geometry));
-	      } else {
-	        geometry.forEach(function (geom) {
-	          return results.push(_this.fallback(geom));
-	        });
+	    for (var i = 0; i < nodes.length; i++) {
+	      if (nodes[i] === needleID) {
+	        nodes[i] = replacementID;
 	      }
 	    }
 
-	    return presetCollection(utilArrayUniq(results));
-	  };
-
-	  return _this;
-	}
-
-	// `presetCategory` builds a `presetCollection` of member presets,
-	// decorated with some extra methods for searching and matching geometry
-	//
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	function presetCategory(categoryID, category, all) {
-	  var _this = Object.assign({}, category); // shallow copy
+	    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 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..
 
-	  _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 (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	      if (acc.indexOf(geometry) === -1) {
-	        acc.push(geometry);
+	    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)
 	      }
-	    }
+	    };
 
-	    return acc;
-	  }, []);
+	    if (changeset_id) {
+	      r.way['@changeset'] = changeset_id;
+	    }
 
-	  _this.matchGeometry = function (geom) {
-	    return _this.geometry.indexOf(geom) >= 0;
-	  };
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      var coordinates = resolver.childNodes(this).map(function (n) {
+	        return n.loc;
+	      });
 
-	  _this.matchAllGeometry = function (geometries) {
-	    return _this.members.collection.some(function (preset) {
-	      return preset.matchAllGeometry(geometries);
+	      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;
+	        })]
+	      };
 
-	  _this.matchScore = function () {
-	    return -1;
-	  };
+	      if (!this.isClosed() && nodes.length) {
+	        json.coordinates[0].push(nodes[0].loc);
+	      }
 
-	  _this.name = function () {
-	    return _t("presets.categories.".concat(categoryID, ".name"), {
-	      'default': categoryID
-	    });
-	  };
+	      var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
 
-	  _this.nameLabel = function () {
-	    return _t.html("presets.categories.".concat(categoryID, ".name"), {
-	      'default': categoryID
-	    });
-	  };
+	      if (area > 2 * Math.PI) {
+	        json.coordinates[0] = json.coordinates[0].reverse();
+	        area = d3_geoArea(json);
+	      }
 
-	  _this.terms = function () {
-	    return [];
-	  };
+	      return isNaN(area) ? 0 : area;
+	    });
+	  }
+	}); // Filter function to eliminate consecutive duplicates.
 
-	  return _this;
+	function noRepeatNodes(node, i, arr) {
+	  return i === 0 || node !== arr[i - 1];
 	}
 
-	// `presetField` decorates a given `field` Object
-	// with some extra methods for searching and matching geometry
 	//
+	// 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 presetField(fieldID, field) {
-	  var _this = Object.assign({}, field); // shallow copy
-
+	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+	  if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	  _this.id = fieldID; // for use in classes, element ids, css selectors
+	  var outerMember;
 
-	  _this.safeid = utilSafeClassName(fieldID);
+	  for (var memberIndex in entity.members) {
+	    var member = entity.members[memberIndex];
 
-	  _this.matchGeometry = function (geom) {
-	    return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
-	  };
+	    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);
 
-	  _this.matchAllGeometry = function (geometries) {
-	    return !_this.geometry || geometries.every(function (geom) {
-	      return _this.geometry.indexOf(geom) !== -1;
-	    });
-	  };
+	      if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+	        return false;
+	      }
+	    }
+	  }
 
-	  _this.t = function (scope, options) {
-	    return _t("presets.fields.".concat(fieldID, ".").concat(scope), options);
-	  };
+	  return outerMember;
+	} // For fixing up rendering of multipolygons with tags on the outer member.
+	// https://github.com/openstreetmap/iD/issues/613
 
-	  _this.t.html = function (scope, options) {
-	    return _t.html("presets.fields.".concat(fieldID, ".").concat(scope), options);
-	  };
+	function osmIsOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+	    return false;
+	  }
 
-	  _this.title = function () {
-	    return _this.overrideLabel || _this.t('label', {
-	      'default': fieldID
-	    });
-	  };
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
 
-	  _this.label = function () {
-	    return _this.overrideLabel || _this.t.html('label', {
-	      'default': fieldID
-	    });
-	  };
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	  var _placeholder = _this.placeholder;
+	  var members = parent.members,
+	      member;
 
-	  _this.placeholder = function () {
-	    return _this.t('placeholder', {
-	      'default': _placeholder
-	    });
-	  };
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
-	  _this.originalTerms = (_this.terms || []).join();
+	    if (member.id === entity.id && member.role && member.role !== 'outer') {
+	      // Not outer member
+	      return false;
+	    }
 
-	  _this.terms = function () {
-	    return _this.t('terms', {
-	      'default': _this.originalTerms
-	    }).toLowerCase().trim().split(/\s*,+\s*/);
-	  };
+	    if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+	      // Not a simple multipolygon
+	      return false;
+	    }
+	  }
 
-	  _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
-	  return _this;
+	  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];
 
-	// `Array.prototype.lastIndexOf` method
-	// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
-	_export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
-	  lastIndexOf: arrayLastIndexOf
-	});
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	// `presetPreset` decorates a given `preset` Object
-	// with some extra methods for searching and matching geometry
-	//
+	  var members = parent.members,
+	      member,
+	      outerMember;
 
-	function presetPreset(presetID, preset, addable, allFields, allPresets) {
-	  allFields = allFields || {};
-	  allPresets = allPresets || {};
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
-	  var _this = Object.assign({}, preset); // shallow copy
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false; // Not a simple multipolygon
 
+	      outerMember = member;
+	    }
+	  }
 
-	  var _addable = addable || false;
+	  if (!outerMember) return false;
+	  var outerEntity = graph.hasEntity(outerMember.id);
 
-	  var _resolvedFields; // cache
+	  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.
+	//
 
-	  var _resolvedMoreFields; // cache
+	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
 
-	  _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 || [];
+	  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)
 
-	  _this.fields = function () {
-	    return _resolvedFields || (_resolvedFields = resolve('fields'));
-	  };
+	  var i;
+	  var joinAsMembers = true;
 
-	  _this.moreFields = function () {
-	    return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
-	  };
+	  for (i = 0; i < toJoin.length; i++) {
+	    if (toJoin[i] instanceof osmWay) {
+	      joinAsMembers = false;
+	      break;
+	    }
+	  }
 
-	  _this.resetFields = function () {
-	    return _resolvedFields = _resolvedMoreFields = null;
-	  };
+	  var sequences = [];
+	  sequences.actions = [];
 
-	  _this.tags = _this.tags || {};
-	  _this.addTags = _this.addTags || _this.tags;
-	  _this.removeTags = _this.removeTags || _this.addTags;
-	  _this.geometry = _this.geometry || [];
+	  while (toJoin.length) {
+	    // start a new sequence
+	    var item = toJoin.shift();
+	    var currWays = [item];
+	    var currNodes = resolve(item).slice(); // add to it
 
-	  _this.matchGeometry = function (geom) {
-	    return _this.geometry.indexOf(geom) >= 0;
-	  };
+	    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.
 
-	  _this.matchAllGeometry = function (geoms) {
-	    return geoms.every(_this.matchGeometry);
-	  };
+	      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.
 
-	  _this.matchScore = function (entityTags) {
-	    var tags = _this.tags;
-	    var seen = {};
-	    var score = 0; // match on tags
+	        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];
+	        }
 
-	    for (var k in tags) {
-	      seen[k] = true;
+	        if (nodes[0] === end) {
+	          fn = currNodes.push; // join to end
 
-	      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
+	          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
 
-	    var addTags = _this.addTags;
+	          nodes = nodes.slice(0, -1);
+	          break;
+	        } else if (nodes[0] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	    for (var _k in addTags) {
-	      if (!seen[_k] && entityTags[_k] === addTags[_k]) {
-	        score += _this.originalScore;
+	          nodes = nodes.slice(1).reverse();
+	          item = reverse(item);
+	          break;
+	        } else {
+	          fn = nodes = null;
+	        }
 	      }
-	    }
-
-	    return score;
-	  };
-
-	  _this.t = function (scope, options) {
-	    var textID = "presets.presets.".concat(presetID, ".").concat(scope);
-	    return _t(textID, options);
-	  };
 
-	  _this.t.html = function (scope, options) {
-	    var textID = "presets.presets.".concat(presetID, ".").concat(scope);
-	    return _t.html(textID, options);
-	  };
+	      if (!nodes) {
+	        // couldn't find a joinable way/member
+	        break;
+	      }
 
-	  _this.name = function () {
-	    return _this.t('name', {
-	      'default': _this.originalName
-	    });
-	  };
+	      fn.apply(currWays, [item]);
+	      fn.apply(currNodes, nodes);
+	      toJoin.splice(i, 1);
+	    }
 
-	  _this.nameLabel = function () {
-	    return _this.t.html('name', {
-	      'default': _this.originalName
-	    });
-	  };
+	    currWays.nodes = currNodes;
+	    sequences.push(currWays);
+	  }
 
-	  _this.subtitle = function () {
-	    if (_this.suggestion) {
-	      var path = presetID.split('/');
-	      path.pop(); // remove brand name
+	  return sequences;
+	}
 
-	      return _t('presets.presets.' + path.join('/') + '.name');
-	    }
+	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.
 
-	    return null;
-	  };
+	    var isPTv2 = /stop|platform/.test(member.role);
 
-	  _this.subtitleLabel = function () {
-	    if (_this.suggestion) {
-	      var path = presetID.split('/');
-	      path.pop(); // remove brand name
+	    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;
+	      }
 
-	      return _t.html('presets.presets.' + path.join('/') + '.name');
+	      graph = graph.replace(relation.addMember(member, memberIndex));
 	    }
 
-	    return null;
-	  };
-
-	  _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');
-	  };
+	    return graph;
+	  }; // Add a way member into the relation "wherever it makes sense".
+	  // In this situation we were not supplied a memberIndex.
 
-	  _this.addable = function (val) {
-	    if (!arguments.length) return _addable;
-	    _addable = val;
-	    return _this;
-	  };
+	  function addWayMember(relation, graph) {
+	    var groups, tempWay, insertPairIsReversed, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-	  _this.reference = function () {
-	    // Lookup documentation on Wikidata...
-	    var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
+	    var PTv2members = [];
+	    var members = [];
 
-	    if (qid) {
-	      return {
-	        qid: qid
-	      };
-	    } // Lookup documentation on OSM Wikibase...
+	    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);
+	      }
+	    }
 
-	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-	    var value = _this.originalReference.value || _this.tags[key];
+	    relation = relation.update({
+	      members: members
+	    });
 
-	    if (value === '*') {
-	      return {
-	        key: key
+	    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 || []; // Insert pair is reversed if the inserted way comes before the original one.
+	      // (Except when they form a loop.)
+
+	      var originalWay = graph.entity(insertPair.originalID);
+	      var insertedWay = graph.entity(insertPair.insertedID);
+	      insertPairIsReversed = originalWay.nodes.length > 0 && insertedWay.nodes.length > 0 && insertedWay.nodes[insertedWay.nodes.length - 1] === originalWay.nodes[0] && originalWay.nodes[originalWay.nodes.length - 1] !== insertedWay.nodes[0];
 	    } else {
-	      return {
-	        key: key,
-	        value: value
-	      };
+	      // 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);
 	    }
-	  };
 
-	  _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-	    tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
+	    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
 
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
-	          delete tags[field.key];
-	        }
-	      });
-	    }
+	    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
 
-	    delete tags.area;
-	    return tags;
-	  };
+	      for (j = 0; j < members.length; j++) {
+	        if (members[j].index === startIndex) {
+	          break;
+	        }
+	      } // k = each member in segment
 
-	  _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`)
+	      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) {
+	          var reverse = nodes[0].id !== insertPair.nodes[0] ^ insertPairIsReversed;
 
-	    if (!addTags.hasOwnProperty('area')) {
-	      delete tags.area;
+	          if (reverse) {
+	            item.pair = [{
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          } else {
+	            item.pair = [{
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          }
+	        } // reorder `members` if necessary
 
-	      if (geometry === 'area') {
-	        var needsAreaTag = true;
 
-	        if (_this.geometry.indexOf('line') === -1) {
-	          for (var _k2 in addTags) {
-	            if (_k2 in osmAreaKeys) {
-	              needsAreaTag = false;
-	              break;
-	            }
+	        if (k > 0) {
+	          if (j + k >= members.length || item.index !== members[j + k].index) {
+	            moveMember(members, item.index, j + k);
 	          }
 	        }
 
-	        if (needsAreaTag) {
-	          tags.area = 'yes';
-	        }
+	        nodes.splice(0, way.nodes.length - 1);
 	      }
 	    }
 
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
-	          tags[field.key] = field["default"];
-	        }
-	      });
-	    }
+	    if (tempWay) {
+	      graph = graph.remove(tempWay);
+	    } // Final pass: skip dead items, split pairs, remove index properties
 
-	    return tags;
-	  }; // For a preset without fields, use the fields of the parent preset.
-	  // Replace {preset} placeholders with the fields of the specified presets.
 
+	    var wayMembers = [];
 
-	  function resolve(which) {
-	    var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
-	    var resolved = [];
-	    fieldIDs.forEach(function (fieldID) {
-	      var match = fieldID.match(/\{(.*)\}/);
+	    for (i = 0; i < members.length; i++) {
+	      item = members[i];
+	      if (item.index === -1) continue;
 
-	      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]);
+	      if (item.pair) {
+	        wayMembers.push(item.pair[0]);
+	        wayMembers.push(item.pair[1]);
 	      } else {
-	        console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
+	        wayMembers.push(utilObjectOmit(item, ['index']));
 	      }
-	    }); // no fields resolved, so use the parent's if possible
+	    } // 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
 
-	    if (!resolved.length) {
-	      var endIndex = _this.id.lastIndexOf('/');
 
-	      var parentID = endIndex && _this.id.substring(0, endIndex);
+	    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
+	    //
 
-	      if (parentID) {
-	        resolved = inheritFields(parentID, which);
+	    function moveMember(arr, findIndex, toIndex) {
+	      var i;
+
+	      for (i = 0; i < arr.length; i++) {
+	        if (arr[i].index === findIndex) {
+	          break;
+	        }
 	      }
-	    }
 
-	    return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
+	      var item = Object.assign({}, arr[i]); // shallow copy
 
-	    function inheritFields(presetID, which) {
-	      var parent = allPresets[presetID];
-	      if (!parent) return [];
+	      arr[i].index = -1; // mark as dead
 
-	      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=*`
+	      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 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;
+	    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;
 	    }
 	  }
-
-	  return _this;
 	}
 
-	var _mainPresetIndex = presetIndex(); // singleton
-	// `presetIndex` wraps a `presetCollection`
-	// with methods for loading new data and returning defaults
-	//
+	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 presetIndex() {
-	  var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-	  var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
+	          return;
+	        }
+	      }
+	    });
+	    return graph;
+	  };
+	}
 
-	  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
-	  });
+	// 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 _this = presetCollection([POINT, LINE, AREA, RELATION]);
+	function actionChangeMember(relationId, member, memberIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+	  };
+	}
 
-	  var _presets = {
-	    point: POINT,
-	    line: LINE,
-	    area: AREA,
-	    relation: RELATION
+	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
+
+	    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 _defaults = {
-	    point: presetCollection([POINT]),
-	    vertex: presetCollection([POINT]),
-	    line: presetCollection([LINE]),
-	    area: presetCollection([AREA]),
-	    relation: presetCollection([RELATION])
+	}
+
+	function actionChangeTags(entityId, tags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
 	  };
-	  var _fields = {};
-	  var _categories = {};
-	  var _universal = [];
-	  var _addablePresetIDs = null; // Set of preset IDs that the user can add
+	}
 
-	  var _recents;
+	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?
 
-	  var _favorites; // Index of presets by (geometry, tag key).
+	    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);
 
-	  var _geometryIndex = {
-	    point: {},
-	    vertex: {},
-	    line: {},
-	    area: {},
-	    relation: {}
-	  };
+	      for (i = 0; i < keys.length; i++) {
+	        if (re.test(keys[i])) {
+	          val = this.tags[keys[i]].toLowerCase();
+	          break;
+	        }
+	      }
+	    }
 
-	  var _loadPromise;
+	    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
 
-	  _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());
-	    });
-	  };
+	      if (v !== '' && !isNaN(+v)) {
+	        results.push(+v);
+	        return;
+	      } // string direction - inspect parent ways
 
-	  _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];
+	      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);
+	  },
+	  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);
+
+	      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 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';
 	      });
-	    } // Merge Presets
+	    });
+	  },
+	  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
+	    };
+	  }
+	});
+
+	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;
+	    });
 
-	    if (d.presets) {
-	      Object.keys(d.presets).forEach(function (presetID) {
-	        var p = d.presets[presetID];
+	    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 (p) {
-	          // add or replace
-	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
+	    if (!keyNodes.length) {
+	      keyNodes = [nodes[0]];
+	      keyPoints = [points[0]];
+	    }
 
-	          _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-	        } else {
-	          // remove (but not if it's a fallback)
-	          var existing = _presets[presetID];
+	    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.
 
-	          if (existing && !existing.isFallback()) {
-	            delete _presets[presetID];
-	          }
-	        }
-	      });
-	    } // Need to rebuild _this.collection before loading categories
 
+	    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;
 
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Categories
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // position this key node
 
-	    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
+	      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
 
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
+	      if (totalAngle * sign > 0) {
+	        totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+	      }
 
-	    if (d.defaults) {
-	      Object.keys(d.defaults).forEach(function (geometry) {
-	        var def = d.defaults[geometry];
+	      do {
+	        numberNewPoints++;
+	        eachAngle = totalAngle / (indexRange + numberNewPoints);
+	      } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-	        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
 
+	      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
 
-	    _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
+	      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
 
-	    _geometryIndex = {
-	      point: {},
-	      vertex: {},
-	      line: {},
-	      area: {},
-	      relation: {}
-	    };
+	        var min = Infinity;
 
-	    _this.collection.forEach(function (preset) {
-	      (preset.geometry || []).forEach(function (geometry) {
-	        var g = _geometryIndex[geometry];
+	        for (var nodeId in nearNodes) {
+	          var nearAngle = nearNodes[nodeId];
+	          var dist = Math.abs(nearAngle - angle);
 
-	        for (var key in preset.tags) {
-	          (g[key] = g[key] || []).push(preset);
+	          if (dist < min) {
+	            min = dist;
+	            origNode = origNodes[nodeId];
+	          }
 	        }
-	      });
-	    });
 
-	    return _this;
-	  };
+	        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..
 
-	  _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';
-	      }
+	      if (indexRange === 1 && inBetweenNodes.length) {
+	        var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+	        var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+	        var wayDirection1 = endIndex1 - startIndex1;
 
-	      return _this.matchTags(entity.tags, geometry);
-	    });
-	  };
+	        if (wayDirection1 < -1) {
+	          wayDirection1 = 1;
+	        }
 
-	  _this.matchTags = function (tags, geometry) {
-	    var geometryMatches = _geometryIndex[geometry];
-	    var address;
-	    var best = -1;
-	    var match;
+	        var parentWays = graph.parentWays(keyNodes[i]);
 
-	    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];
-	      }
+	        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;
+	            }
 
-	      var keyMatches = geometryMatches[k];
-	      if (!keyMatches) continue;
+	            if (wayDirection1 !== wayDirection2) {
+	              inBetweenNodes.reverse();
+	              insertAt = startIndex2;
+	            }
 
-	      for (var i = 0; i < keyMatches.length; i++) {
-	        var score = keyMatches[i].matchScore(tags);
+	            for (k = 0; k < inBetweenNodes.length; k++) {
+	              sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+	            }
 
-	        if (score > best) {
-	          best = score;
-	          match = keyMatches[i];
+	            graph = graph.replace(sharedWay);
+	          }
 	        }
 	      }
-	    }
+	    } // update the way to have all the new nodes
 
-	    if (address && (!match || match.isFallback())) {
-	      match = address;
-	    }
 
-	    return match || _this.fallback(geometry);
+	    ids = nodes.map(function (n) {
+	      return n.id;
+	    });
+	    ids.push(ids[0]);
+	    way = way.update({
+	      nodes: ids
+	    });
+	    graph = graph.replace(way);
+	    return graph;
 	  };
 
-	  _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;
+	  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);
 	    });
-	  }; // 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 sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var hull = d3_polygonHull(points);
+	    var i, j; // D3 convex hulls go counterclockwise..
 
-	    var presets = _this.collection.filter(function (p) {
-	      return !p.suggestion && !p.replacement;
-	    }); // keeplist
+	    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;
 
-	    presets.forEach(function (p) {
-	      var keys = p.tags && Object.keys(p.tags);
-	      var key = keys && keys.length && keys[0]; // pick the first tag
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // move interior nodes to the surface of the convex hull..
 
-	      if (!key) return;
-	      if (ignore.indexOf(key) !== -1) return;
 
-	      if (p.geometry.indexOf('area') !== -1) {
-	        // probably an area..
-	        areaKeys[key] = areaKeys[key] || {};
+	      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);
 	      }
-	    }); // discardlist
+	    }
 
-	    presets.forEach(function (p) {
-	      var key;
+	    return graph;
+	  };
 
-	      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];
+	  action.disabled = function (graph) {
+	    if (!graph.entity(wayId).isClosed()) {
+	      return 'not_closed';
+	    } //disable when already circular
 
-	        if (key in areaKeys && // probably an area...
-	        p.geometry.indexOf('line') !== -1 && // but sometimes a line
-	        value !== '*') {
-	          areaKeys[key][value] = true;
-	        }
-	      }
+
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
 	    });
-	    return areaKeys;
-	  };
+	    var hull = d3_polygonHull(points);
+	    var epsilonAngle = Math.PI / 180;
 
-	  _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
+	    if (hull.length !== points.length || hull.length < 3) {
+	      return false;
+	    }
 
-	      var keys = d.tags && Object.keys(d.tags);
-	      var key = keys && keys.length && keys[0]; // pick the first tag
+	    var centroid = d3_polygonCentroid(points);
+	    var radius = geoVecLengthSquare(centroid, points[0]);
+	    var i, actualPoint; // compare distances between centroid and points
 
-	      if (!key) return pointTags; // if this can be a point
+	    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%)
 
-	      if (d.geometry.indexOf('point') !== -1) {
-	        pointTags[key] = pointTags[key] || {};
-	        pointTags[key][d.tags[key]] = true;
+	      if (diff > 0.05 * radius) {
+	        return false;
 	      }
+	    } //check if central angles are smaller than maxAngle
 
-	      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 keys = d.tags && Object.keys(d.tags);
-	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	      if (!key) return vertexTags; // if this can be a vertex
+	    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 (d.geometry.indexOf('vertex') !== -1) {
-	        vertexTags[key] = vertexTags[key] || {};
-	        vertexTags[key][d.tags[key]] = true;
+	      if (angle < 0) {
+	        angle = -angle;
 	      }
 
-	      return vertexTags;
-	    }, {});
-	  };
+	      if (angle > Math.PI) {
+	        angle = 2 * Math.PI - angle;
+	      }
 
-	  _this.field = function (id) {
-	    return _fields[id];
-	  };
+	      if (angle > maxAngle + epsilonAngle) {
+	        return false;
+	      }
+	    }
 
-	  _this.universal = function () {
-	    return _universal;
+	    return 'already_circular';
 	  };
 
-	  _this.defaults = function (geometry, n, startWithRecents) {
-	    var recents = [];
-
-	    if (startWithRecents) {
-	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-	    }
+	  action.transitionable = true;
+	  return action;
+	}
 
-	    var defaults;
+	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 (_addablePresetIDs) {
-	      defaults = Array.from(_addablePresetIDs).map(function (id) {
-	        var preset = _this.item(id);
+	    if (geometries.point) return false; // delete if this node only be a vertex
 
-	        if (preset && preset.matchGeometry(geometry)) return preset;
-	        return null;
-	      }).filter(Boolean);
-	    } else {
-	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-	    }
+	    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 presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
-	  }; // pass a Set of addable preset ids
+	    return !node.hasInterestingTags();
+	  }
 
+	  var action = function action(graph) {
+	    var way = graph.entity(wayID);
+	    graph.parentRelations(way).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(wayID);
+	      graph = graph.replace(parent);
 
-	  _this.addablePresetIDs = function (val) {
-	    if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
+	      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 (Array.isArray(val)) val = new Set(val);
-	    _addablePresetIDs = val;
+	      if (canDeleteNode(node, graph)) {
+	        graph = graph.remove(node);
+	      }
+	    });
+	    return graph.remove(way);
+	  };
 
-	    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 action;
+	}
 
-	    return _this;
+	function actionDeleteMultiple(ids) {
+	  var actions = {
+	    way: actionDeleteWay,
+	    node: actionDeleteNode,
+	    relation: actionDeleteRelation
 	  };
 
-	  _this.recent = function () {
-	    return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
-	      return d.preset;
-	    })));
+	  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;
 	  };
 
-	  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 action;
+	}
 
-	    return item;
+	function actionDeleteRelation(relationID, allowUntaggedMembers) {
+	  function canDeleteEntity(entity, graph) {
+	    return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
 	  }
 
-	  function ribbonItemForMinified(d, source) {
-	    if (d && d.pID) {
-	      var preset = _this.item(d.pID);
-
-	      if (!preset) return null;
-	      return RibbonItem(preset, source);
-	    }
+	  var action = function action(graph) {
+	    var relation = graph.entity(relationID);
+	    graph.parentRelations(relation).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(relationID);
+	      graph = graph.replace(parent);
 
-	    return null;
-	  }
+	      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);
 
-	  _this.getGenericRibbonItems = function () {
-	    return ['point', 'line', 'area'].map(function (id) {
-	      return RibbonItem(_this.item(id), 'generic');
+	      if (canDeleteEntity(entity, graph)) {
+	        graph = actionDeleteMultiple([memberID])(graph);
+	      }
 	    });
+	    return graph.remove(relation);
 	  };
 
-	  _this.getAddable = function () {
-	    if (!_addablePresetIDs) return [];
-	    return _addablePresetIDs.map(function (id) {
-	      var preset = _this.item(id);
-
-	      if (preset) return RibbonItem(preset, 'addable');
-	      return null;
-	    }).filter(Boolean);
-	  };
+	  return action;
+	}
 
-	  function setRecents(items) {
-	    _recents = items;
-	    var minifiedItems = items.map(function (d) {
-	      return d.minified();
-	    });
-	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
-	    dispatch$1.call('recentsChange');
-	  }
+	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);
 
-	  _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;
-	      }, []);
-	    }
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteWay(parent.id)(graph);
+	      }
+	    });
+	    graph.parentRelations(node).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(nodeId);
+	      graph = graph.replace(parent);
 
-	    return _recents;
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    return graph.remove(node);
 	  };
 
-	  _this.addRecent = function (preset, besidePreset, after) {
-	    var recents = _this.getRecents();
+	  return action;
+	}
 
-	    var beforeItem = _this.recentMatching(besidePreset);
+	//
+	// First choose a node to be the survivor, with preference given
+	// to the oldest existing (not new) and "interesting" 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
+	//
 
-	    var toIndex = recents.indexOf(beforeItem);
-	    if (after) toIndex += 1;
-	    var newItem = RibbonItem(preset, 'recent');
-	    recents.splice(toIndex, 0, newItem);
-	    setRecents(recents);
-	  };
+	function actionConnect(nodeIDs) {
+	  var action = function action(graph) {
+	    var survivor;
+	    var node;
+	    var parents;
+	    var i, j; // Select the node with the ID passed as parameter if it is in the list,
+	    // otherwise select the node with the oldest ID as the survivor, or the
+	    // last one if there are only new nodes.
 
-	  _this.removeRecent = function (preset) {
-	    var item = _this.recentMatching(preset);
+	    nodeIDs.reverse();
+	    var interestingIDs = [];
 
-	    if (item) {
-	      var items = _this.getRecents();
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
 
-	      items.splice(items.indexOf(item), 1);
-	      setRecents(items);
+	      if (node.hasInterestingTags()) {
+	        if (!node.isNew()) {
+	          interestingIDs.push(node.id);
+	        }
+	      }
 	    }
-	  };
 
-	  _this.recentMatching = function (preset) {
-	    var items = _this.getRecents();
+	    survivor = graph.entity(utilOldestID(interestingIDs.length > 0 ? interestingIDs : nodeIDs)); // Replace all non-surviving nodes with the survivor and merge tags.
 
-	    for (var i in items) {
-	      if (items[i].matches(preset)) {
-	        return items[i];
+	    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));
 	      }
-	    }
 
-	    return null;
-	  };
+	      parents = graph.parentRelations(node);
 
-	  _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;
-	  };
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceMember(node, survivor));
+	      }
 
-	  _this.moveRecent = function (item, beforeItem) {
-	    var recents = _this.getRecents();
+	      survivor = survivor.mergeTags(node.tags);
+	      graph = actionDeleteNode(node.id)(graph);
+	    }
 
-	    var fromIndex = recents.indexOf(item);
-	    var toIndex = recents.indexOf(beforeItem);
+	    graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-	    var items = _this.moveItem(recents, fromIndex, toIndex);
+	    parents = graph.parentWays(survivor);
 
-	    if (items) setRecents(items);
-	  };
+	    for (i = 0; i < parents.length; i++) {
+	      if (parents[i].isDegenerate()) {
+	        graph = actionDeleteWay(parents[i].id)(graph);
+	      }
+	    }
 
-	  _this.setMostRecent = function (preset) {
-	    if (preset.searchable === false) return;
+	    return graph;
+	  };
 
-	    var items = _this.getRecents();
+	  action.disabled = function (graph) {
+	    var seen = {};
+	    var restrictionIDs = [];
+	    var survivor;
+	    var node, way;
+	    var relations, relation, role;
+	    var i, j, k; // Select the node with the oldest ID as the survivor.
 
-	    var item = _this.recentMatching(preset);
+	    survivor = graph.entity(utilOldestID(nodeIDs)); // 1. disable if the nodes being connected have conflicting relation roles
 
-	    if (item) {
-	      items.splice(items.indexOf(item), 1);
-	    } else {
-	      item = RibbonItem(preset, 'recent');
-	    } // remove the last recent (first in, first out)
+	    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
 
-	    while (items.length >= MAXRECENTS) {
-	      items.pop();
-	    } // prepend array
+	        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
 
-	    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
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      var parents = graph.parentWays(node);
 
-	    dispatch$1.call('favoritePreset');
-	  }
+	      for (j = 0; j < parents.length; j++) {
+	        var parent = parents[j];
+	        relations = graph.parentRelations(parent);
 
-	  _this.addFavorite = function (preset, besidePreset, after) {
-	    var favorites = _this.getFavorites();
+	        for (k = 0; k < relations.length; k++) {
+	          relation = relations[k];
 
-	    var beforeItem = _this.favoriteMatching(besidePreset);
+	          if (relation.hasFromViaTo()) {
+	            restrictionIDs.push(relation.id);
+	          }
+	        }
+	      }
+	    } // test restrictions
 
-	    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();
+	    restrictionIDs = utilArrayUniq(restrictionIDs);
 
-	    var favorite = _this.favoriteMatching(preset);
+	    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)
 
-	    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
+	      var nodes = {
+	        from: [],
+	        via: [],
+	        to: [],
+	        keyfrom: [],
+	        keyto: []
+	      };
 
+	      for (j = 0; j < relation.members.length; j++) {
+	        collectNodes(relation.members[j], nodes);
+	      }
 
-	      favs.push(RibbonItem(preset, 'favorite'));
-	    }
+	      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;
 
-	    setFavorites(favs);
-	  };
+	      for (j = 0; j < nodeIDs.length; j++) {
+	        var n = nodeIDs[j];
 
-	  _this.removeFavorite = function (preset) {
-	    var item = _this.favoriteMatching(preset);
+	        if (nodes.from.indexOf(n) !== -1) {
+	          connectFrom = true;
+	        }
 
-	    if (item) {
-	      var items = _this.getFavorites();
+	        if (nodes.via.indexOf(n) !== -1) {
+	          connectVia = true;
+	        }
 
-	      items.splice(items.indexOf(item), 1);
-	      setFavorites(items);
-	    }
-	  };
+	        if (nodes.to.indexOf(n) !== -1) {
+	          connectTo = true;
+	        }
 
-	  _this.getFavorites = function () {
-	    if (!_favorites) {
-	      // fetch from local storage
-	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
+	        if (nodes.keyfrom.indexOf(n) !== -1) {
+	          connectKeyFrom = true;
+	        }
 
-	      if (!rawFavorites) {
-	        rawFavorites = [];
-	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	        if (nodes.keyto.indexOf(n) !== -1) {
+	          connectKeyTo = true;
+	        }
 	      }
 
-	      _favorites = rawFavorites.reduce(function (output, d) {
-	        var item = ribbonItemForMinified(d, 'favorite');
-	        if (item && item.preset.addable()) output.push(item);
-	        return output;
-	      }, []);
-	    }
+	      if (connectFrom && connectTo && !isUturn) {
+	        return 'restriction';
+	      }
 
-	    return _favorites;
-	  };
+	      if (connectFrom && connectVia) {
+	        return 'restriction';
+	      }
 
-	  _this.favoriteMatching = function (preset) {
-	    var favs = _this.getFavorites();
+	      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.
 
-	    for (var index in favs) {
-	      if (favs[index].matches(preset)) {
-	        return favs[index];
-	      }
-	    }
 
-	    return null;
-	  };
+	      if (connectKeyFrom || connectKeyTo) {
+	        if (nodeIDs.length !== 2) {
+	          return 'restriction';
+	        }
 
-	  return utilRebind(_this, dispatch$1, 'on');
-	}
+	        var n0 = null;
+	        var n1 = null;
 
-	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 (j = 0; j < memberWays.length; j++) {
+	          way = memberWays[j];
 
-	  for (var i = 0; i < array.length; i++) {
-	    val = array[i];
-	    entity = typeof val === 'string' ? graph.hasEntity(val) : val;
+	          if (way.contains(nodeIDs[0])) {
+	            n0 = nodeIDs[0];
+	          }
 
-	    if (entity) {
-	      extent._extend(entity.extent(graph));
-	    }
-	  }
+	          if (way.contains(nodeIDs[1])) {
+	            n1 = nodeIDs[1];
+	          }
+	        }
 
-	  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 (n0 && n1) {
+	          // both nodes are part of the restriction
+	          var ok = false;
 
-	    if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-	      tagDiff.push({
-	        type: '-',
-	        key: k,
-	        oldVal: oldVal,
-	        newVal: newVal,
-	        display: '- ' + k + '=' + oldVal
-	      });
-	    }
+	          for (j = 0; j < memberWays.length; j++) {
+	            way = memberWays[j];
 
-	    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
+	            if (way.areAdjacent(n0, n1)) {
+	              ok = true;
+	              break;
+	            }
+	          }
 
-	function utilEntityOrMemberSelector(ids, graph) {
-	  var seen = new Set(ids);
-	  ids.forEach(collectShallowDescendants);
-	  return utilEntitySelector(Array.from(seen));
+	          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)
 
-	  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
+	      for (j = 0; j < memberWays.length; j++) {
+	        way = memberWays[j].update({}); // make copy
 
-	function utilEntityAndDeepMemberIDs(ids, graph) {
-	  var seen = new Set();
-	  ids.forEach(collectDeepDescendants);
-	  return Array.from(seen);
+	        for (k = 0; k < nodeIDs.length; k++) {
+	          if (nodeIDs[k] === survivor.id) continue;
 
-	  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
+	          if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+	            way = way.removeNode(nodeIDs[k]);
+	          } else {
+	            way = way.replaceNode(nodeIDs[k], survivor.id);
+	          }
+	        }
 
-	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));
+	        if (way.isDegenerate()) {
+	          return 'restriction';
+	        }
+	      }
+	    }
 
-	  function collectDeepDescendants(id) {
-	    if (seen.has(id)) return;
-	    seen.add(id);
+	    return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-	    if (!idsSet.has(id)) {
-	      returners.add(id);
+	    function hasDuplicates(n, i, arr) {
+	      return arr.indexOf(n) !== arr.lastIndexOf(n);
 	    }
 
-	    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 keyNodeFilter(froms, tos) {
+	      return function (n) {
+	        return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+	      };
+	    }
 
-	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 collectNodes(member, collection) {
+	      var entity = graph.hasEntity(member.id);
+	      if (!entity) return;
+	      var role = member.role || '';
 
-	function utilGetAllNodes(ids, graph) {
-	  var seen = new Set();
-	  var nodes = new Set();
-	  ids.forEach(collectNodes);
-	  return Array.from(nodes);
+	      if (!collection[role]) {
+	        collection[role] = [];
+	      }
 
-	  function collectNodes(id) {
-	    if (seen.has(id)) return;
-	    seen.add(id);
-	    var entity = graph.hasEntity(id);
-	    if (!entity) return;
+	      if (member.type === 'node') {
+	        collection[role].push(member.id);
 
-	    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 (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 (!name && entity.tags.ref) {
-	    name = entity.tags.ref;
+	        if (role === 'from' || role === 'via') {
+	          collection.keyfrom.push(entity.first());
+	          collection.keyfrom.push(entity.last());
+	        }
 
-	    if (network) {
-	      name = network + ' ' + name;
+	        if (role === 'to' || role === 'via') {
+	          collection.keyto.push(entity.first());
+	          collection.keyto.push(entity.last());
+	        }
+	      }
 	    }
-	  }
+	  };
 
-	  return name;
+	  return action;
 	}
-	function utilDisplayNameForPath(entity) {
-	  var name = utilDisplayName(entity);
-	  var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
 
-	  if (!isFirefox && name && rtlRegex.test(name)) {
-	    name = fixRTLTextForSvg(name);
-	  }
+	function actionCopyEntities(ids, fromGraph) {
+	  var _copies = {};
 
-	  return name;
-	}
-	function utilDisplayType(id) {
-	  return {
-	    n: _t('inspector.node'),
-	    w: _t('inspector.way'),
-	    r: _t('inspector.relation')
-	  }[id.charAt(0)];
-	}
-	function utilDisplayLabel(entity, graphOrGeometry) {
-	  var displayName = utilDisplayName(entity);
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      fromGraph.entity(id).copy(fromGraph, _copies);
+	    });
+
+	    for (var id in _copies) {
+	      graph = graph.replace(_copies[id]);
+	    }
 
-	  if (displayName) {
-	    // use the display name if there is one
-	    return displayName;
-	  }
+	    return graph;
+	  };
 
-	  var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+	  action.copies = function () {
+	    return _copies;
+	  };
+
+	  return action;
+	}
 
-	  if (preset && preset.name()) {
-	    // use the preset name if there is a match
-	    return preset.name();
-	  } // fallback to the display type (node/way/relation)
+	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 utilDisplayType(entity.id);
+	    return graph;
+	  };
 	}
-	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
+	function actionDiscardTags(difference, discardTags) {
+	  discardTags = discardTags || {};
+	  return function (graph) {
+	    difference.modified().forEach(checkTags);
+	    difference.created().forEach(checkTags);
+	    return graph;
 
-	  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`
+	    function checkTags(entity) {
+	      var keys = Object.keys(entity.tags);
+	      var didDiscard = false;
+	      var tags = {};
 
-	      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];
-	          }
+	      for (var i = 0; i < keys.length; i++) {
+	        var k = keys[i];
+
+	        if (discardTags[k] || !entity.tags[k]) {
+	          didDiscard = true;
 	        } else {
-	          // type is array
-	          if (tags[key].indexOf(value) === -1) {
-	            // subsequent alternate value, add to array
-	            tags[key].push(value);
-	          }
+	          tags[k] = entity.tags[k];
 	        }
 	      }
 
-	      var tagHash = key + '=' + value;
-	      if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
-	      tagCounts[tagHash] += 1;
-	    });
-	  });
+	      if (didDiscard) {
+	        graph = graph.replace(entity.update({
+	          tags: tags
+	        }));
+	      }
+	    }
+	  };
+	}
 
-	  for (var key in tags) {
-	    if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
+	//
+	// 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
+	//
 
-	    tags[key] = tags[key].sort(function (val1, val2) {
-	      var key = key; // capture
+	function actionDisconnect(nodeId, newNodeId) {
+	  var wayIds;
+	  var disconnectableRelationTypes = {
+	    'associatedStreet': true,
+	    'enforcement': true,
+	    'site': true
+	  };
 
-	      var count2 = tagCounts[key + '=' + val2];
-	      var count1 = tagCounts[key + '=' + val1];
+	  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 (count2 !== count1) {
-	        return count2 - count1;
+	      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;
+	  };
 
-	      if (val2 && val1) {
-	        return val1.localeCompare(val2);
-	      }
+	  action.connections = function (graph) {
+	    var candidates = [];
+	    var keeping = false;
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var way, waynode;
 
-	      return val1 ? 1 : -1;
-	    });
-	  }
+	    for (var i = 0; i < parentWays.length; i++) {
+	      way = parentWays[i];
 
-	  return tags;
-	}
-	function utilStringQs(str) {
-	  var i = 0; // advance past any leading '?' or '#' characters
+	      if (wayIds && wayIds.indexOf(way.id) === -1) {
+	        keeping = true;
+	        continue;
+	      }
 
-	  while (i < str.length && (str[i] === '?' || str[i] === '#')) {
-	    i++;
-	  }
+	      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];
 
-	  str = str.slice(i);
-	  return str.split('&').reduce(function (obj, pair) {
-	    var parts = pair.split('=');
+	          if (waynode === nodeId) {
+	            if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+	              continue;
+	            }
 
-	    if (parts.length === 2) {
-	      obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+	            candidates.push({
+	              wayID: way.id,
+	              index: j
+	            });
+	          }
+	        }
+	      }
 	    }
 
-	    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 keeping ? candidates : candidates.slice(1);
+	  };
 
-	  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);
+	  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.filter(function (relation) {
+	        return !disconnectableRelationTypes[relation.tags.type];
+	      }).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';
+	  };
 
-	  while (++i < n) {
-	    if (prefixes[i] + property in s) {
-	      return prefixes[i] + property;
-	    }
-	  }
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return wayIds;
+	    wayIds = val;
+	    return action;
+	  };
 
-	  return false;
+	  return action;
 	}
-	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();
-	  }
+	function actionExtract(entityID, projection) {
+	  var extractedNodeID;
 
-	  while (++i < n) {
-	    if (prefixes[i] + property in s) {
-	      return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
+
+	    if (entity.type === 'node') {
+	      return extractFromNode(entity, graph);
 	    }
-	  }
 
-	  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.
+	    return extractFromWayOrRelation(entity, graph);
+	  };
 
-	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 = [];
-	  var i, j;
+	  function extractFromNode(node, graph) {
+	    extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-	  for (i = 0; i <= b.length; i++) {
-	    matrix[i] = [i];
-	  }
+	    var replacement = osmNode({
+	      loc: node.loc
+	    });
+	    graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-	  for (j = 0; j <= a.length; j++) {
-	    matrix[0][j] = j;
+	    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);
 	  }
 
-	  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
-	      }
+	  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);
+
+	    if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+	      extractedLoc = entity.extent(graph).center();
 	    }
-	  }
 
-	  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
+	    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
 
-	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]
+	    var pointTags = {};
 
-	function utilWrap(index, length) {
-	  if (index < 0) {
-	    index += Math.ceil(-index / length) * length;
-	  }
+	    for (var key in entityTags) {
+	      if (entity.type === 'relation' && key === 'type') {
+	        continue;
+	      }
 
-	  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
-	 */
+	      if (keysToRetain.indexOf(key) !== -1) {
+	        continue;
+	      }
 
-	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/
+	      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 utilHashcode(str) {
-	  var hash = 0;
 
-	  if (str.length === 0) {
-	    return hash;
-	  }
+	      if (isIndoorArea && key === 'indoor') {
+	        continue;
+	      } // copy the tag from the entity to the point
 
-	  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
-	  }
+	      pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-	  return hash;
-	} // Returns version of `str` with all runs of special characters replaced by `_`;
-	// suitable for HTML ids, classes, selectors, etc.
+	      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 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.
+	      delete entityTags[key];
+	    }
 
-	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.
+	    if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+	      // ensure that areas keep area geometry
+	      entityTags.area = 'yes';
+	    }
 
-	function utilUnicodeCharsTruncated(str, limit) {
-	  return Array.from(str).slice(0, limit).join('');
+	    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;
 	}
 
-	function osmEntity(attrs) {
-	  // For prototypal inheritance.
-	  if (this instanceof osmEntity) return; // Create the appropriate subtype.
+	//
+	// 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
+	//
 
-	  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).
+	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); // 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.
 
-	  return new osmEntity().initialize(arguments);
-	}
+	    var survivorID = utilOldestID(ways.map(function (way) {
+	      return way.id;
+	    })); // if any of the ways are sided (e.g. coastline, cliff, kerb)
+	    // sort them first so they establish the overall order - #6033
 
-	osmEntity.id = function (type) {
-	  return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-	};
+	    ways.sort(function (a, b) {
+	      var aSided = a.isSided();
+	      var bSided = b.isSided();
+	      return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
+	    });
+	    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.
 
-	osmEntity.id.next = {
-	  changeset: -1,
-	  node: -1,
-	  way: -1,
-	  relation: -1
-	};
+	    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
 
-	osmEntity.id.fromOSM = function (type, id) {
-	  return type[0] + id;
-	};
+	    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
 
-	osmEntity.id.toOSM = function (id) {
-	  return id.slice(1);
-	};
+	      if (multipolygons.length !== 1) return;
+	      var multipolygon = multipolygons[0];
 
-	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().
+	      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);
 
-	osmEntity.key = function (entity) {
-	  return entity.id + 'v' + (entity.v || 0);
-	};
+	      if (survivor.geometry(graph) !== 'area') {
+	        // ensure the feature persists as an area
+	        tags.area = 'yes';
+	      }
 
-	var _deprecatedTagValuesByKey;
+	      delete tags.type; // remove type=multipolygon
 
-	osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
-	  if (!_deprecatedTagValuesByKey) {
-	    _deprecatedTagValuesByKey = {};
-	    dataDeprecated.forEach(function (d) {
-	      var oldKeys = Object.keys(d.old);
+	      survivor = survivor.update({
+	        tags: tags
+	      });
+	      graph = graph.replace(survivor);
+	    }
 
-	      if (oldKeys.length === 1) {
-	        var oldKey = oldKeys[0];
-	        var oldValue = d.old[oldKey];
+	    checkForSimpleMultipolygon();
+	    return graph;
+	  }; // Returns the number of nodes the resultant way is expected to have
 
-	        if (oldValue !== '*') {
-	          if (!_deprecatedTagValuesByKey[oldKey]) {
-	            _deprecatedTagValuesByKey[oldKey] = [oldValue];
-	          } else {
-	            _deprecatedTagValuesByKey[oldKey].push(oldValue);
-	          }
-	        }
-	      }
-	    });
-	  }
 
-	  return _deprecatedTagValuesByKey;
-	};
+	  action.resultingWayNodesLength = function (graph) {
+	    return ids.reduce(function (count, id) {
+	      return count + graph.entity(id).nodes.length;
+	    }, 0) - ids.length - 1;
+	  };
 
-	osmEntity.prototype = {
-	  tags: {},
-	  initialize: function initialize(sources) {
-	    for (var i = 0; i < sources.length; ++i) {
-	      var source = sources[i];
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	      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 (ids.length < 2 || ids.length !== geometries.line.length) {
+	      return 'not_eligible';
 	    }
 
-	    if (!this.id && this.type) {
-	      this.id = osmEntity.id(this.type);
-	    }
+	    var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-	    if (!this.hasOwnProperty('visible')) {
-	      this.visible = true;
+	    if (joined.length > 1) {
+	      return 'not_adjacent';
 	    }
 
-	    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
+	    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 changed = false;
+	    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;
+	      });
+	    };
 
-	    for (var k in tags) {
-	      var t1 = merged[k];
-	      var t2 = tags[k];
+	    var relsA = sortedParentRelations(ids[0]);
 
-	      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()
-	        );
+	    for (i = 1; i < ids.length; i++) {
+	      var relsB = sortedParentRelations(ids[i]);
+
+	      if (!utilArrayIdentical(relsA, relsB)) {
+	        return 'conflicting_relations';
 	      }
-	    }
+	    } // Loop through all combinations of path-pairs
+	    // to check potential intersections between all pairs
 
-	    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);
-	  },
-	  hasWikidata: function hasWikidata() {
-	    return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
-	  },
-	  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);
+	    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;
+	        });
+	        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
 
-	      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
+	        var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+	          return n.loc.toString();
+	        }), intersections.map(function (n) {
+	          return n.toString();
+	        }));
 
-	        if (hasExistingValues) return;
+	        if (common.length !== intersections.length) {
+	          return 'paths_intersect';
+	        }
 	      }
+	    }
 
-	      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);
-
-	        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;
-	            }
-	          }
+	    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;
 	        }
-
-	        return false;
 	      });
 
-	      if (matchesDeprecatedTags) {
-	        deprecated.push(d);
+	      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;
+	        }
 	      }
 	    });
-	    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;
+	    if (relation) {
+	      return relation.isRestriction() ? 'restriction' : 'connectivity';
 	    }
-	  }
-
-	  switch (tags.highway) {
-	    case 'trunk':
-	    case 'motorway':
-	      count = isOneWay ? 2 : 4;
-	      break;
-
-	    default:
-	      count = isOneWay ? 1 : 2;
-	      break;
-	  }
 
-	  return count;
-	}
+	    if (conflicting) {
+	      return 'conflicting_tags';
+	    }
+	  };
 
-	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);
+	  return action;
 	}
 
-	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;
+	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);
+	    }));
+	  }
 
-	  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;
-	    }
+	  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;
 
-	    forward = laneCount - bothways - backward;
-	  } else if (isNaN(backward)) {
-	    if (forward > laneCount - bothways) {
-	      forward = laneCount - bothways;
-	    }
+	      if (!point.isNew()) {
+	        // Try to preserve the original point if it already has
+	        // an ID in the database.
+	        var inserted = false;
 
-	    backward = laneCount - bothways - forward;
-	  }
+	        var canBeReplaced = function canBeReplaced(node) {
+	          return !(graph.parentWays(node).length > 1 || graph.parentRelations(node).length);
+	        };
 
-	  return {
-	    forward: forward,
-	    backward: backward,
-	    bothways: bothways
-	  };
-	}
+	        var replaceNode = function replaceNode(node) {
+	          graph = graph.replace(point.update({
+	            tags: node.tags,
+	            loc: node.loc
+	          }));
+	          target = target.replaceNode(node.id, point.id);
+	          graph = graph.replace(target);
+	          removeNode = node;
+	          inserted = true;
+	        };
 
-	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 i;
+	        var node; // First, try to replace a new child node on the target way.
 
-	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;
-	  });
-	}
+	        for (i = 0; i < nodes.length; i++) {
+	          node = nodes[i];
 
-	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;
-	  });
-	}
+	          if (canBeReplaced(node) && node.isNew()) {
+	            replaceNode(node);
+	            break;
+	          }
+	        }
 
-	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;
-	  });
-	}
+	        if (!inserted && point.hasInterestingTags()) {
+	          // No new child node found, try to find an existing, but
+	          // uninteresting child node instead.
+	          for (i = 0; i < nodes.length; i++) {
+	            node = nodes[i];
 
-	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;
-	  });
-	}
+	            if (canBeReplaced(node) && !node.hasInterestingTags()) {
+	              replaceNode(node);
+	              break;
+	            }
+	          }
 
-	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();
+	          if (!inserted) {
+	            // Still not inserted, try to find an existing, interesting,
+	            // but more recent child node.
+	            for (i = 0; i < nodes.length; i++) {
+	              node = nodes[i];
 
-	      for (var i = 0; i < this.nodes.length; i++) {
-	        var node = resolver.hasEntity(this.nodes[i]);
+	              if (canBeReplaced(node) && utilCompareIDs(point.id, node.id) < 0) {
+	                replaceNode(node);
+	                break;
+	              }
+	            }
+	          } // If the point still hasn't been inserted, we give up.
+	          // There are more interesting or older nodes on the way.
 
-	        if (node) {
-	          extent._extend(node.extent());
 	        }
 	      }
 
-	      return extent;
+	      graph = graph.remove(removeNode);
 	    });
-	  },
-	  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 (target.tags.area === 'yes') {
+	      var tags = Object.assign({}, target.tags); // shallow copy
 
-	    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
+	      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);
 	      }
-	    };
+	    }
 
-	    for (var key in averageWidths) {
-	      if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-	        var width = averageWidths[key][this.tags[key]];
+	    return graph;
+	  };
 
-	        if (key === 'highway') {
-	          var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-	          if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
-	          return width * laneCount;
-	        }
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	        return width;
-	      }
+	    if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+	      return 'not_eligible';
 	    }
+	  };
 
-	    return null;
-	  },
-	  isOneWay: function isOneWay() {
-	    // explicit oneway tag..
-	    var values = {
-	      'yes': true,
-	      '1': true,
-	      '-1': true,
-	      'reversible': true,
-	      'alternating': true,
-	      'no': false,
-	      '0': false
-	    };
+	  return action;
+	}
 
-	    if (values[this.tags.oneway] !== undefined) {
-	      return values[this.tags.oneway];
-	    } // implied oneway tag..
+	//
+	// 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;
+	      }
 
-	    for (var key in this.tags) {
-	      if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) return true;
+	      sum = geoVecAdd(sum, node.loc);
 	    }
 
-	    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];
+	    return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+	  }
 
-	      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];
-	        }
+	  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 null;
-	  },
-	  isSided: function isSided() {
-	    if (this.tags.two_sided === 'yes') {
-	      return false;
+	    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 this.sidednessIdentifier() !== null;
+	    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();
 	  },
-	  lanes: function lanes() {
-	    return osmLanes(this);
+	  geometry: function geometry() {
+	    return 'changeset';
 	  },
-	  isClosed: function isClosed() {
-	    return this.nodes.length > 1 && this.first() === this.last();
+	  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'
+	        }
+	      }
+	    };
 	  },
-	  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;
+	  // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+	  // XML. Returns a string.
+	  osmChangeJXON: function osmChangeJXON(changes) {
+	    var changeset_id = this.id;
 
-	    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;
+	    function nest(x, order) {
+	      var groups = {};
 
-	      if (curr === 0) {
-	        continue;
-	      } else if (prev && curr !== prev) {
-	        return false;
+	      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]);
 	      }
 
-	      prev = curr;
-	    }
+	      var ordered = {};
+	      order.forEach(function (o) {
+	        if (groups[o]) ordered[o] = groups[o];
+	      });
+	      return ordered;
+	    } // sort relations in a changeset by dependencies
 
-	    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;
-	      }
-	    }
 
-	    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])]]);
-	    }
+	    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
 
-	    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
+	      function isNew(item) {
+	        return !sorted[item['@id']] && !processing.find(function (proc) {
+	          return proc['@id'] === item['@id'];
 	        });
 	      }
 
-	      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..
+	      var processing = [];
+	      var sorted = {};
+	      var relations = changes.relation;
+	      if (!relations) return changes;
 
-	    while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	      nodes.splice(i, 1);
-	      i = nodes.length - 1;
-	    }
+	      for (var i = 0; i < relations.length; i++) {
+	        var relation = relations[i]; // skip relation if already sorted
 
-	    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;
+	        if (!sorted[relation['@id']]) {
+	          processing.push(relation);
+	        }
 
-	    if (index === undefined) {
-	      index = max;
-	    }
+	        while (processing.length > 0) {
+	          var next = processing[0],
+	              deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-	    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 (deps.length === 0) {
+	            sorted[next['@id']] = next;
+	            processing.shift();
+	          } else {
+	            processing = deps.concat(processing);
+	          }
+	        }
+	      }
 
+	      changes.relation = Object.values(sorted);
+	      return changes;
+	    }
 
-	    if (isClosed) {
-	      var connector = this.first(); // leading connectors..
+	    function rep(entity) {
+	      return entity.asJXON(changeset_id);
+	    }
 
-	      var i = 1;
+	    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 {};
+	  }
+	});
 
-	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	        nodes.splice(i, 1);
-	        if (index > i) index--;
-	      } // trailing connectors..
+	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--;
+	};
 
-	      i = nodes.length - 1;
+	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];
 
-	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	        nodes.splice(i, 1);
-	        if (index > i) index--;
-	        i = nodes.length - 1;
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
 	      }
 	    }
 
-	    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]);
+	    if (!this.id) {
+	      this.id = osmNote.id().toString();
 	    }
 
+	    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({
-	      nodes: nodes
+	      loc: loc
 	    });
-	  },
-	  // 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;
-
-	    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..
+	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;
+	};
 
-	      i = nodes.length - 1;
+	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();
 
-	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	        nodes.splice(i, 1);
-	        if (index === i) index = 0; // update leading connector instead
+	      for (var i = 0; i < this.members.length; i++) {
+	        var member = resolver.hasEntity(this.members[i].id);
 
-	        i = nodes.length - 1;
+	        if (member) {
+	          extent._extend(member.extent(resolver, memo));
+	        }
 	      }
-	    }
 
-	    nodes.splice(index, 1, id);
-	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+	      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);
 
-	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	      nodes.push(nodes[0]);
+	    for (var i = 0; i < this.members.length; i++) {
+	      result[i] = Object.assign({}, this.members[i], {
+	        index: i
+	      });
 	    }
 
-	    return this.update({
-	      nodes: nodes
-	    });
+	    return result;
 	  },
-	  // 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;
+	  // 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 = [];
 
-	    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]);
+	    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({
-	      nodes: nodes
+	      members: members
 	    });
 	  },
-	  // 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..
+	  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 = [];
 
-	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	      nodes.push(nodes[0]);
+	    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({
-	      nodes: nodes
+	      members: members
 	    });
 	  },
 	  asJXON: function asJXON(changeset_id) {
 	    var r = {
-	      way: {
+	      relation: {
 	        '@id': this.osmId(),
 	        '@version': this.version || 0,
-	        nd: this.nodes.map(function (id) {
+	        member: this.members.map(function (member) {
 	          return {
 	            keyAttributes: {
-	              ref: osmEntity.id.toOSM(id)
+	              type: member.type,
+	              role: member.role,
+	              ref: osmEntity.id.toOSM(member.id)
 	            }
 	          };
 	        }, this),
@@ -24732,74066 +40638,82742 @@
 	    };
 
 	    if (changeset_id) {
-	      r.way['@changeset'] = changeset_id;
+	      r.relation['@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;
-	      });
-
-	      if (this.isArea() && this.isClosed()) {
+	      if (this.isMultipolygon()) {
 	        return {
-	          type: 'Polygon',
-	          coordinates: [coordinates]
+	          type: 'MultiPolygon',
+	          coordinates: this.multipolygon(resolver)
 	        };
 	      } else {
 	        return {
-	          type: 'LineString',
-	          coordinates: coordinates
+	          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 () {
-	      var nodes = resolver.childNodes(this);
-	      var json = {
-	        type: 'Polygon',
-	        coordinates: [nodes.map(function (n) {
-	          return n.loc;
-	        })]
-	      };
+	      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;
+	      }
+	    }
 
-	      if (!this.isClosed() && nodes.length) {
-	        json.coordinates[0].push(nodes[0].loc);
+	    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 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 area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+	      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];
+	    });
 
-	      if (area > 2 * Math.PI) {
-	        json.coordinates[0] = json.coordinates[0].reverse();
-	        area = d3_geoArea(json);
+	    function findOuter(inner) {
+	      var o, outer;
+
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+
+	        if (geoPolygonContainsPolygon(outer, inner)) {
+	          return o;
+	        }
 	      }
 
-	      return isNaN(area) ? 0 : area;
-	    });
+	      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;
 	  }
-	}); // Filter function to eliminate consecutive duplicates.
+	});
 
-	function noRepeatNodes(node, i, arr) {
-	  return i === 0 || node !== arr[i - 1];
-	}
+	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
+
+	    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);
+	    }
+	  }
+
+	  _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--;
+	    }
+	  }]);
+
+	  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
+
+	    var origNodes = wayA.nodes.slice();
+	    var nodesA;
+	    var nodesB;
+	    var isArea = wayA.isArea();
+	    var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-	//
-	// 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.
+	    if (wayA.isClosed()) {
+	      var nodes = wayA.nodes.slice(0, -1);
+	      var idxA = nodes.indexOf(nodeId);
+	      var idxB = splitArea(nodes, idxA, graph);
 
-	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-	  if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-	    return false;
-	  }
+	      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);
+	    }
 
-	  var outerMember;
+	    var lengthA = totalLengthBetweenNodes(graph, nodesA);
+	    var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-	  for (var memberIndex in entity.members) {
-	    var member = entity.members[memberIndex];
+	    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 (!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 (wayA.tags.step_count) {
+	      // divide up the the step count proportionally between the two ways
+	      var stepCount = parseFloat(wayA.tags.step_count);
 
-	      if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-	        return false;
+	      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
+	        });
 	      }
 	    }
-	  }
 
-	  return outerMember;
-	} // For fixing up rendering of multipolygons with tags on the outer member.
-	// https://github.com/openstreetmap/iD/issues/613
+	    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
 
-	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;
+	      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
 
-	  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 (f.id === wayA.id || t.id === wayA.id) {
+	          var keepB = false;
 
-	    if (member.id !== entity.id && (!member.role || member.role === 'outer')) return false; // Not a simple multipolygon
-	  }
+	          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);
 
-	  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;
+	                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+	                  keepB = true;
+	                  break;
+	                }
+	              }
+	            }
+	          }
 
-	  for (var i = 0; i < members.length; i++) {
-	    member = members[i];
+	          if (keepB) {
+	            relation = relation.replaceMember(wayA, wayB);
+	            graph = graph.replace(relation);
+	          } // 2. split a VIA
 
-	    if (!member.role || member.role === 'outer') {
-	      if (outerMember) return false; // Not a simple multipolygon
+	        } 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)
 
-	      outerMember = member;
+	      } 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: {}
+	      }));
 	    }
-	  }
 
-	  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.
-	//
+	    _createdWayIDs.push(wayB.id);
 
-	function osmJoinWays(toJoin, graph) {
-	  function resolve(member) {
-	    return graph.childNodes(graph.entity(member.id));
+	    return graph;
 	  }
 
-	  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
+	  var action = function action(graph) {
+	    _createdWayIDs = [];
+	    var newWayIndex = 0;
 
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	  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)
+	      for (var j = 0; j < candidates.length; j++) {
+	        graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+	        newWayIndex += 1;
+	      }
+	    }
 
-	  var i;
-	  var joinAsMembers = true;
+	    return graph;
+	  };
 
-	  for (i = 0; i < toJoin.length; i++) {
-	    if (toJoin[i] instanceof osmWay) {
-	      joinAsMembers = false;
-	      break;
-	    }
-	  }
+	  action.getCreatedWayIDs = function () {
+	    return _createdWayIDs;
+	  };
 
-	  var sequences = [];
-	  sequences.actions = [];
+	  action.waysForNode = function (nodeId, graph) {
+	    var node = graph.entity(nodeId);
+	    var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-	  while (toJoin.length) {
-	    // start a new sequence
-	    var item = toJoin.shift();
-	    var currWays = [item];
-	    var currNodes = resolve(item).slice(); // add to it
+	    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';
+	      });
 
-	    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.
+	      if (hasLine) {
+	        return splittableParents.filter(function (parent) {
+	          return parent.geometry(graph) === 'line';
+	        });
+	      }
+	    }
 
-	      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.
+	    return splittableParents;
 
-	        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];
-	        }
+	    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 (nodes[0] === end) {
-	          fn = currNodes.push; // join to end
+	      if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-	          nodes = nodes.slice(1);
-	          break;
-	        } else if (nodes[nodes.length - 1] === end) {
-	          fn = currNodes.push; // join to end
+	      for (var i = 1; i < parent.nodes.length - 1; i++) {
+	        if (parent.nodes[i] === nodeId) return true;
+	      }
 
-	          nodes = nodes.slice(0, -1).reverse();
-	          item = reverse(item);
-	          break;
-	        } else if (nodes[nodes.length - 1] === start) {
-	          fn = currNodes.unshift; // join to beginning
+	      return false;
+	    }
+	  };
 
-	          nodes = nodes.slice(0, -1);
-	          break;
-	        } else if (nodes[0] === start) {
-	          fn = currNodes.unshift; // join to beginning
+	  action.ways = function (graph) {
+	    return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+	      return action.waysForNode(nodeId, graph);
+	    })));
+	  };
 
-	          nodes = nodes.slice(1).reverse();
-	          item = reverse(item);
-	          break;
-	        } else {
-	          fn = nodes = null;
-	        }
-	      }
+	  action.disabled = function (graph) {
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	      if (!nodes) {
-	        // couldn't find a joinable way/member
-	        break;
+	      if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+	        return 'not_eligible';
 	      }
-
-	      fn.apply(currWays, [item]);
-	      fn.apply(currNodes, nodes);
-	      toJoin.splice(i, 1);
 	    }
+	  };
 
-	    currWays.nodes = currNodes;
-	    sequences.push(currWays);
-	  }
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return _wayIDs;
+	    _wayIDs = val;
+	    return action;
+	  };
 
-	  return sequences;
+	  action.keepHistoryOn = function (val) {
+	    if (!arguments.length) return _keepHistoryOn;
+	    _keepHistoryOn = val;
+	    return action;
+	  };
+
+	  return action;
 	}
 
-	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.
+	function coreGraph(other, mutable) {
+	  if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-	    var isPTv2 = /stop|platform/.test(member.role);
+	  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]);
+	  }
 
-	    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;
-	      }
+	  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
 
-	      graph = graph.replace(relation.addMember(member, memberIndex));
+	    if (!entity) {
+	      entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
 	    }
 
-	    return graph;
-	  }; // Add a way member into the relation "wherever it makes sense".
-	  // In this situation we were not supplied a memberIndex.
+	    if (!entity) {
+	      throw new Error('entity ' + id + ' not found');
+	    }
 
-	  function addWayMember(relation, graph) {
-	    var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
+	    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] = {});
 
-	    var PTv2members = [];
-	    var members = [];
+	    if (transients[key] !== undefined) {
+	      return transients[key];
+	    }
 
-	    for (i = 0; i < relation.members.length; i++) {
-	      var m = relation.members[i];
+	    transients[key] = fn.call(entity);
+	    return transients[key];
+	  },
+	  parentWays: function parentWays(entity) {
+	    var parents = this._parentWays[entity.id];
+	    var result = [];
 
-	      if (/stop|platform/.test(m.role)) {
-	        PTv2members.push(m);
-	      } else {
-	        members.push(m);
-	      }
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
 	    }
 
-	    relation = relation.update({
-	      members: members
-	    });
+	    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 (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);
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
 	    }
 
-	    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
+	    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 = [];
+
+	    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;
 
-	    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 (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
 
-	      for (j = 0; j < members.length; j++) {
-	        if (members[j].index === startIndex) {
-	          break;
-	        }
-	      } // k = each member in segment
+	      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
 
-	      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 (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 (k > 0) {
-	          if (j + k >= members.length || item.index !== members[j + k].index) {
-	            moveMember(members, item.index, j + k);
+	            if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+	              delete ents[id];
+	            }
 	          }
 	        }
-
-	        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;
+	    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 (item.pair) {
-	        wayMembers.push(item.pair[0]);
-	        wayMembers.push(item.pair[1]);
-	      } else {
-	        wayMembers.push(utilObjectOmit(item, ['index']));
+	    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;
 	      }
-	    } // 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
 
+	      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);
+	      }
 
-	    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
-	    //
+	      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;
+	      }) : [];
 
-	    function moveMember(arr, findIndex, toIndex) {
-	      var i;
+	      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 < arr.length; i++) {
-	        if (arr[i].index === findIndex) {
-	          break;
-	        }
+	      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);
 	      }
 
-	      var item = Object.assign({}, arr[i]); // shallow copy
+	      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 replace(entity) {
+	    if (this.entities[entity.id] === entity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(this.entities[entity.id], entity);
 
-	      arr[i].index = -1; // mark as dead
+	      this.entities[entity.id] = entity;
+	    });
+	  },
+	  remove: function remove(entity) {
+	    return this.update(function () {
+	      this._updateCalculated(entity, undefined);
 
-	      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
+	      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;
 
-	    function withIndex(arr) {
-	      var result = new Array(arr.length);
+	    for (var i = 0; i < arguments.length; i++) {
+	      arguments[i].call(graph, graph);
+	    }
 
-	      for (var i = 0; i < arr.length; i++) {
-	        result[i] = Object.assign({}, arr[i]); // shallow copy
+	    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);
 
-	        result[i].index = i;
-	      }
+	    for (var i in entities) {
+	      this.entities[i] = entities[i];
 
-	      return result;
+	      this._updateCalculated(base.entities[i], this.entities[i]);
 	    }
-	  }
-	}
 
-	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 this;
+	  }
+	};
 
-	          return;
-	        }
-	      }
-	    });
-	    return graph;
-	  };
-	}
+	function osmTurn(turn) {
+	  if (!(this instanceof osmTurn)) {
+	    return new osmTurn(turn);
+	  }
 
-	// 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));
-	  };
+	  Object.assign(this, turn);
 	}
+	function osmIntersection(graph, startVertexId, maxDistance) {
+	  maxDistance = maxDistance || 30; // in meters
 
-	function actionChangeMember(relationId, member, memberIndex) {
-	  return function (graph) {
-	    return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-	  };
-	}
+	  var vgraph = coreGraph(); // virtual graph
 
-	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
-	    }));
-	  };
-	}
+	  var i, j, k;
 
-	function actionChangeTags(entityId, tags) {
-	  return function (graph) {
-	    var entity = graph.entity(entityId);
-	    return graph.replace(entity.update({
-	      tags: tags
-	    }));
-	  };
-	}
+	  function memberOfRestriction(entity) {
+	    return graph.parentRelations(entity).some(function (r) {
+	      return r.isRestriction();
+	    });
+	  }
 
-	function osmNode() {
-	  if (!(this instanceof osmNode)) {
-	    return new osmNode().initialize(arguments);
-	  } else if (arguments.length) {
-	    this.initialize(arguments);
+	  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];
 	  }
-	}
-	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 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 re = /:direction$/i;
-	      var keys = Object.keys(this.tags);
+	  var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+	  //  for more key vertices and ways to include in the intersection..
 
-	      for (i = 0; i < keys.length; i++) {
-	        if (re.test(keys[i])) {
-	          val = this.tags[keys[i]].toLowerCase();
-	          break;
-	        }
-	      }
-	    }
+	  while (checkVertices.length) {
+	    vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
 
-	    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
+	    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
 
-	      if (v !== '' && !isNaN(+v)) {
-	        results.push(+v);
-	        return;
-	      } // string direction - inspect parent ways
+	      hasWays = true; // check the way's children for more key vertices
 
+	      nodes = utilArrayUniq(graph.childNodes(way));
 
-	      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 (j = 0; j < nodes.length; j++) {
+	        node = nodes[j];
+	        if (node === vertex) continue; // same thing
 
-	        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 (vertices.indexOf(node) !== -1) continue; // seen it already
 
-	            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 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);
+	        if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+	        // a key vertex will have parents that are also roads
 
-	      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();
+	        var hasParents = false;
+	        parents = graph.parentWays(node);
 
-	        if (way.isClosed()) {
-	          nodes.pop();
-	        } // ignore connecting node if closed
-	        // return true if vertex appears multiple times (way is self intersecting)
+	        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
 
-	        return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
-	      }
+	          if (!isRoad(parent)) continue; // not a road
 
-	      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)
+	          hasParents = true;
+	          break;
+	        }
+
+	        if (hasParents) {
+	          checkVertices.push(node);
+	        }
 	      }
-	    };
-	    if (changeset_id) r.node['@changeset'] = changeset_id;
-	    return r;
-	  },
-	  asGeoJSON: function asGeoJSON() {
-	    return {
-	      type: 'Point',
-	      coordinates: this.loc
-	    };
+	    }
+
+	    if (hasWays) {
+	      vertices.push(vertex);
+	    }
 	  }
-	});
 
-	function actionCircularize(wayId, projection, maxAngle) {
-	  maxAngle = (maxAngle || 20) * Math.PI / 180;
+	  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
 
-	  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 = {};
+	  ways.forEach(function (way) {
 	    graph.childNodes(way).forEach(function (node) {
-	      if (!origNodes[node.id]) origNodes[node.id] = 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
 
-	    if (!way.isConvex(graph)) {
-	      graph = action.makeConvex(graph);
+	  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 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
+	  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 (!keyNodes.length) {
-	      keyNodes = [nodes[0]];
-	      keyPoints = [points[0]];
+	    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);
+	      });
 	    }
+	  }); // 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
 
-	    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.
+	  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.
 
-	    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;
+	  function withMetadata(way, vertexIds) {
+	    var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
-	      if (indexRange < 0) {
-	        indexRange += nodes.length;
-	      } // position this key node
 
+	    var __first = vertexIds.indexOf(way.first()) !== -1;
 
-	      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
+	    var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
-	      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));
-	      }
+	    var __via = __first && __last;
 
-	      do {
-	        numberNewPoints++;
-	        eachAngle = totalAngle / (indexRange + numberNewPoints);
-	      } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
+	    var __from = __first && !__oneWay || __last;
 
+	    var __to = __first || __last && !__oneWay;
 
-	      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
+	    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
 
-	      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 keepGoing;
+	  var removeWayIds = [];
+	  var removeVertexIds = [];
 
-	        var min = Infinity;
+	  do {
+	    keepGoing = false;
+	    checkVertices = vertexIds.slice();
 
-	        for (var nodeId in nearNodes) {
-	          var nearAngle = nearNodes[nodeId];
-	          var dist = Math.abs(nearAngle - angle);
+	    for (i = 0; i < checkVertices.length; i++) {
+	      var vertexId = checkVertices[i];
+	      vertex = vgraph.hasEntity(vertexId);
 
-	          if (dist < min) {
-	            min = dist;
-	            origNode = origNodes[nodeId];
-	          }
+	      if (!vertex) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
 	        }
 
-	        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..
-
+	        removeVertexIds.push(vertexId);
+	        continue;
+	      }
 
-	      if (indexRange === 1 && inBetweenNodes.length) {
-	        var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-	        var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-	        var wayDirection1 = endIndex1 - startIndex1;
+	      parents = vgraph.parentWays(vertex);
 
-	        if (wayDirection1 < -1) {
-	          wayDirection1 = 1;
+	      if (parents.length < 3) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
 	        }
+	      }
 
-	        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 (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 (wayDirection2 < -1) {
-	              wayDirection2 = 1;
-	            }
+	        if (aIsLeaf && !bIsLeaf) {
+	          leaf = a;
+	          survivor = b;
+	        } else if (!aIsLeaf && bIsLeaf) {
+	          leaf = b;
+	          survivor = a;
+	        }
 
-	            if (wayDirection1 !== wayDirection2) {
-	              inBetweenNodes.reverse();
-	              insertAt = startIndex2;
-	            }
+	        if (leaf && survivor) {
+	          survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-	            for (k = 0; k < inBetweenNodes.length; k++) {
-	              sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-	            }
+	          vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
-	            graph = graph.replace(sharedWay);
-	          }
+	          removeWayIds.push(leaf.id);
+	          keepGoing = true;
 	        }
 	      }
-	    } // 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;
+	      parents = vgraph.parentWays(vertex);
 
-	      if (indexRange < 0) {
-	        indexRange += nodes.length;
-	      } // move interior nodes to the surface of the convex hull..
+	      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;
+	      }
 
-	      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);
+	      if (parents.length < 1) {
+	        // vertex is no longer attached to anything
+	        vgraph = vgraph.remove(vertex);
 	      }
 	    }
+	  } while (keepGoing);
 
-	    return graph;
-	  };
-
-	  action.disabled = function (graph) {
-	    if (!graph.entity(wayId).isClosed()) {
-	      return 'not_closed';
-	    } //disable when already circular
+	  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.
+	  //
 
-	    var way = graph.entity(wayId);
-	    var nodes = utilArrayUniq(graph.childNodes(way));
-	    var points = nodes.map(function (n) {
-	      return projection(n.loc);
+	  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 hull = d3_polygonHull(points);
-	    var epsilonAngle = Math.PI / 180;
-
-	    if (hull.length !== points.length || hull.length < 3) {
-	      return false;
-	    }
+	    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 centroid = d3_polygonCentroid(points);
-	    var radius = geoVecLengthSquare(centroid, points[0]);
-	    var i, actualPoint; // compare distances between centroid and points
+	    var maxPathLength = maxViaWay * 2 + 3;
+	    var turns = [];
+	    step(start);
+	    return turns; // traverse the intersection graph and find all the valid paths
 
-	    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 step(entity, currPath, currRestrictions, matchedRestriction) {
+	      currPath = (currPath || []).slice(); // shallow copy
 
-	      if (diff > 0.05 * radius) {
-	        return false;
-	      }
-	    } //check if central angles are smaller than maxAngle
+	      if (currPath.length >= maxPathLength) return;
+	      currPath.push(entity.id);
+	      currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
+	      var i, j;
 
-	    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 (entity.type === 'node') {
+	        var parents = vgraph.parentWays(entity);
+	        var nextWays = []; // which ways can we step into?
 
-	      if (angle < 0) {
-	        angle = -angle;
-	      }
+	        for (i = 0; i < parents.length; i++) {
+	          var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-	      if (angle > Math.PI) {
-	        angle = 2 * Math.PI - angle;
-	      }
+	          if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-	      if (angle > maxAngle + epsilonAngle) {
-	        return false;
-	      }
-	    }
+	          if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-	    return 'already_circular';
-	  };
+	          var restrict = null;
 
-	  action.transitionable = true;
-	  return action;
-	}
+	          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?
 
-	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
+	            var matchesFrom = f.id === fromWayId;
+	            var matchesViaTo = false;
+	            var isAlongOnlyPath = false;
 
-	    if (geometries.point) return false; // delete if this node only be a vertex
+	            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 = [];
 
-	    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
+	                for (k = 2; k < currPath.length; k += 2) {
+	                  // k = 2 skips FROM
+	                  pathVias.push(currPath[k]); // (path goes way-node-way...)
+	                }
 
-	    return !node.hasInterestingTags();
-	  }
+	                var restrictionVias = [];
 
-	  var action = function action(graph) {
-	    var way = graph.entity(wayID);
-	    graph.parentRelations(way).forEach(function (parent) {
-	      parent = parent.removeMembersWithID(wayID);
-	      graph = graph.replace(parent);
+	                for (k = 0; k < v.length; k++) {
+	                  if (v[k].type === 'way') {
+	                    restrictionVias.push(v[k].id);
+	                  }
+	                }
 
-	      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);
+	                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 (canDeleteNode(node, graph)) {
-	        graph = graph.remove(node);
-	      }
-	    });
-	    return graph.remove(way);
-	  };
+	            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)
 
-	  return action;
-	}
 
-	function actionDeleteMultiple(ids) {
-	  var actions = {
-	    way: actionDeleteWay,
-	    node: actionDeleteNode,
-	    relation: actionDeleteRelation
-	  };
+	            if (restrict && restrict.direct) break;
+	          }
 
-	  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;
-	  };
+	          nextWays.push({
+	            way: way,
+	            restrict: restrict
+	          });
+	        }
 
-	  return action;
-	}
+	        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)
 
-	function actionDeleteRelation(relationID, allowUntaggedMembers) {
-	  function canDeleteEntity(entity, graph) {
-	    return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
-	  }
+	          if (matchedRestriction && matchedRestriction.direct === false) {
+	            for (i = 0; i < turnPath.length; i++) {
+	              if (turnPath[i] === matchedRestriction.from) {
+	                turnPath = turnPath.slice(i);
+	                break;
+	              }
+	            }
+	          }
 
-	  var action = function action(graph) {
-	    var relation = graph.entity(relationID);
-	    graph.parentRelations(relation).forEach(function (parent) {
-	      parent = parent.removeMembersWithID(relationID);
-	      graph = graph.replace(parent);
+	          var turn = pathToTurn(turnPath);
 
-	      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 (turn) {
+	            if (matchedRestriction) {
+	              turn.restrictionID = matchedRestriction.id;
+	              turn.no = matchedRestriction.no;
+	              turn.only = matchedRestriction.only;
+	              turn.direct = matchedRestriction.direct;
+	            }
 
-	      if (canDeleteEntity(entity, graph)) {
-	        graph = actionDeleteMultiple([memberID])(graph);
-	      }
-	    });
-	    return graph.remove(relation);
-	  };
+	            turns.push(osmTurn(turn));
+	          }
 
-	  return action;
-	}
+	          if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+	        }
 
-	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 (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+	        // which nodes can we step into?
 
-	      if (parent.isDegenerate()) {
-	        graph = actionDeleteWay(parent.id)(graph);
-	      }
-	    });
-	    graph.parentRelations(node).forEach(function (parent) {
-	      parent = parent.removeMembersWithID(nodeId);
-	      graph = graph.replace(parent);
+	        var n1 = vgraph.entity(entity.first());
+	        var n2 = vgraph.entity(entity.last());
+	        var dist = geoSphericalDistance(n1.loc, n2.loc);
+	        var nextNodes = [];
 
-	      if (parent.isDegenerate()) {
-	        graph = actionDeleteRelation(parent.id)(graph);
-	      }
-	    });
-	    return graph.remove(node);
-	  };
+	        if (currPath.length > 1) {
+	          if (dist > maxDistance) return; // the next node is too far
 
-	  return action;
-	}
+	          if (!entity.__via) return; // this way is a leaf / can't be a via
+	        }
 
-	//
-	// 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
-	//
+	        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
+	        }
 
-	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
+	        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
+	        }
 
-	    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.
+	        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');
 
-	    for (i = 0; i < nodeIDs.length; i++) {
-	      node = graph.entity(nodeIDs[i]);
-	      if (node.id === survivor.id) continue;
-	      parents = graph.parentWays(node);
+	            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);
 
-	      for (j = 0; j < parents.length; j++) {
-	        graph = graph.replace(parents[j].replaceNode(node.id, survivor.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
 
-	      parents = graph.parentRelations(node);
 
-	      for (j = 0; j < parents.length; j++) {
-	        graph = graph.replace(parents[j].replaceMember(node, survivor));
-	      }
+	    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];
 
-	      survivor = survivor.mergeTags(node.tags);
-	      graph = actionDeleteNode(node.id)(graph);
-	    }
+	      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);
 
-	    graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
+	        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
+	        }
+	      }
 
-	    parents = graph.parentWays(survivor);
+	      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
+	      };
 
-	    for (i = 0; i < parents.length; i++) {
-	      if (parents[i].isDegenerate()) {
-	        graph = actionDeleteWay(parents[i].id)(graph);
+	      function adjacentNode(wayId, affixId) {
+	        var nodes = vgraph.entity(wayId).nodes;
+	        return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
 	      }
 	    }
-
-	    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);
+	  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;
 
-	      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
+	  while (angle < 0) {
+	    angle += 360;
+	  }
 
-	        if (relation.hasFromViaTo()) {
-	          restrictionIDs.push(relation.id);
-	        }
+	  if (fromNode === toNode) {
+	    return 'no_u_turn';
+	  }
 
-	        if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-	          return 'relation';
-	        } else {
-	          seen[relation.id] = role;
-	        }
-	      }
-	    } // gather restrictions for parent ways
+	  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)
+	  }
 
-	    for (i = 0; i < nodeIDs.length; i++) {
-	      node = graph.entity(nodeIDs[i]);
-	      var parents = graph.parentWays(node);
+	  if (angle < 158) {
+	    return 'no_right_turn';
+	  }
 
-	      for (j = 0; j < parents.length; j++) {
-	        var parent = parents[j];
-	        relations = graph.parentRelations(parent);
+	  if (angle > 202) {
+	    return 'no_left_turn';
+	  }
 
-	        for (k = 0; k < relations.length; k++) {
-	          relation = relations[k];
+	  return 'no_straight_on';
+	}
 
-	          if (relation.hasFromViaTo()) {
-	            restrictionIDs.push(relation.id);
-	          }
-	        }
+	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';
 	      }
-	    } // test restrictions
+	    });
+	    return Object.assign({
+	      closedWay: [],
+	      multipolygon: [],
+	      other: []
+	    }, geometryGroups);
+	  }
 
+	  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.
 
-	    restrictionIDs = utilArrayUniq(restrictionIDs);
+	    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.
 
-	    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);
+	    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;
+	        }));
 	      });
-	      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)
+	    }); // Sort all polygons as either outer or inner ways
 
-	      var nodes = {
-	        from: [],
-	        via: [],
-	        to: [],
-	        keyfrom: [],
-	        keyto: []
-	      };
+	    var members = [];
+	    var outer = true;
 
-	      for (j = 0; j < relation.members.length; j++) {
-	        collectNodes(relation.members[j], nodes);
-	      }
+	    while (polygons.length) {
+	      extractUncontained(polygons);
+	      polygons = polygons.filter(isContained);
+	      contained = contained.filter(isContained).map(filterContained);
+	    }
 
-	      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;
+	    function isContained(d, i) {
+	      return contained[i].some(function (val) {
+	        return val;
+	      });
+	    }
 
-	      for (j = 0; j < nodeIDs.length; j++) {
-	        var n = nodeIDs[j];
+	    function filterContained(d) {
+	      return d.filter(isContained);
+	    }
 
-	        if (nodes.from.indexOf(n) !== -1) {
-	          connectFrom = true;
+	    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.
+	    // Keep the oldest multipolygon alive if it exists.
 
-	        if (nodes.via.indexOf(n) !== -1) {
-	          connectVia = true;
-	        }
 
-	        if (nodes.to.indexOf(n) !== -1) {
-	          connectTo = true;
-	        }
+	    var relation;
 
-	        if (nodes.keyfrom.indexOf(n) !== -1) {
-	          connectKeyFrom = true;
+	    if (entities.multipolygon.length > 0) {
+	      var oldestID = utilOldestID(entities.multipolygon.map(function (entity) {
+	        return entity.id;
+	      }));
+	      relation = entities.multipolygon.find(function (entity) {
+	        return entity.id === oldestID;
+	      });
+	    } else {
+	      relation = osmRelation({
+	        id: newRelationId,
+	        tags: {
+	          type: 'multipolygon'
 	        }
+	      });
+	    }
 
-	        if (nodes.keyto.indexOf(n) !== -1) {
-	          connectKeyTo = true;
-	        }
+	    entities.multipolygon.forEach(function (m) {
+	      if (m.id !== relation.id) {
+	        relation = relation.mergeTags(m.tags);
+	        graph = graph.remove(m);
 	      }
-
-	      if (connectFrom && connectTo && !isUturn) {
-	        return 'restriction';
+	    });
+	    entities.closedWay.forEach(function (way) {
+	      function isThisOuter(m) {
+	        return m.id === way.id && m.role !== 'inner';
 	      }
 
-	      if (connectFrom && connectVia) {
-	        return 'restriction';
+	      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'])
+	    }));
+	  };
 
-	      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;
+	  action.disabled = function (graph) {
+	    var entities = groupEntities(graph);
 
-	        for (j = 0; j < memberWays.length; j++) {
-	          way = memberWays[j];
+	    if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+	      return 'not_eligible';
+	    }
 
-	          if (way.contains(nodeIDs[0])) {
-	            n0 = nodeIDs[0];
-	          }
+	    if (!entities.multipolygon.every(function (r) {
+	      return r.isComplete(graph);
+	    })) {
+	      return 'incomplete_relation';
+	    }
 
-	          if (way.contains(nodeIDs[1])) {
-	            n1 = nodeIDs[1];
-	          }
+	    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 (n0 && n1) {
-	          // both nodes are part of the restriction
-	          var ok = false;
+	      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';
+	    }
+	  };
 
-	          for (j = 0; j < memberWays.length; j++) {
-	            way = memberWays[j];
+	  return action;
+	}
 
-	            if (way.areAdjacent(n0, n1)) {
-	              ok = true;
-	              break;
-	            }
-	          }
+	var DESCRIPTORS$1 = descriptors;
+	var objectDefinePropertyModule = objectDefineProperty;
+	var regExpFlags = regexpFlags$1;
+	var fails$4 = fails$V;
 
-	          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)
+	var RegExpPrototype = RegExp.prototype;
 
+	var FORCED$2 = DESCRIPTORS$1 && fails$4(function () {
+	  // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	  return Object.getOwnPropertyDescriptor(RegExpPrototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
+	});
 
-	      for (j = 0; j < memberWays.length; j++) {
-	        way = memberWays[j].update({}); // make copy
+	// `RegExp.prototype.flags` getter
+	// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+	if (FORCED$2) objectDefinePropertyModule.f(RegExpPrototype, 'flags', {
+	  configurable: true,
+	  get: regExpFlags
+	});
 
-	        for (k = 0; k < nodeIDs.length; k++) {
-	          if (nodeIDs[k] === survivor.id) continue;
+	var fastDeepEqual = function equal(a, b) {
+	  if (a === b) return true;
 
-	          if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-	            way = way.removeNode(nodeIDs[k]);
-	          } else {
-	            way = way.replaceNode(nodeIDs[k], survivor.id);
-	          }
-	        }
+	  if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+	    if (a.constructor !== b.constructor) return false;
+	    var length, i, keys;
 
-	        if (way.isDegenerate()) {
-	          return 'restriction';
-	        }
+	    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;
 	    }
 
-	    return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
+	    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;
 
-	    function hasDuplicates(n, i, arr) {
-	      return arr.indexOf(n) !== arr.lastIndexOf(n);
+	    for (i = length; i-- !== 0;) {
+	      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
 	    }
 
-	    function keyNodeFilter(froms, tos) {
-	      return function (n) {
-	        return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-	      };
+	    for (i = length; i-- !== 0;) {
+	      var key = keys[i];
+	      if (!equal(a[key], b[key])) return false;
 	    }
 
-	    function collectNodes(member, collection) {
-	      var entity = graph.hasEntity(member.id);
-	      if (!entity) return;
-	      var role = member.role || '';
+	    return true;
+	  } // true if both NaN, false otherwise
 
-	      if (!collection[role]) {
-	        collection[role] = [];
-	      }
 
-	      if (member.type === 'node') {
-	        collection[role].push(member.id);
+	  return a !== a && b !== b;
+	};
 
-	        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);
+	// 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
 
-	        if (role === 'from' || role === 'via') {
-	          collection.keyfrom.push(entity.first());
-	          collection.keyfrom.push(entity.last());
-	        }
+	function LCS(buffer1, buffer2) {
+	  var equivalenceClasses = {};
 
-	        if (role === 'to' || role === 'via') {
-	          collection.keyto.push(entity.first());
-	          collection.keyto.push(entity.last());
-	        }
-	      }
+	  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];
 
-	  return action;
-	}
+	  for (var i = 0; i < buffer1.length; i++) {
+	    var _item = buffer1[i];
+	    var buffer2indices = equivalenceClasses[_item] || [];
+	    var r = 0;
+	    var c = candidates[0];
 
-	function actionCopyEntities(ids, fromGraph) {
-	  var _copies = {};
+	    for (var jx = 0; jx < buffer2indices.length; jx++) {
+	      var _j = buffer2indices[jx];
+	      var s = void 0;
 
-	  var action = function action(graph) {
-	    ids.forEach(function (id) {
-	      fromGraph.entity(id).copy(fromGraph, _copies);
-	    });
+	      for (s = r; s < candidates.length; s++) {
+	        if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+	          break;
+	        }
+	      }
 
-	    for (var id in _copies) {
-	      graph = graph.replace(_copies[id]);
-	    }
+	      if (s < candidates.length) {
+	        var newCandidate = {
+	          buffer1index: i,
+	          buffer2index: _j,
+	          chain: candidates[s]
+	        };
 
-	    return graph;
-	  };
+	        if (r === candidates.length) {
+	          candidates.push(c);
+	        } else {
+	          candidates[r] = c;
+	        }
 
-	  action.copies = function () {
-	    return _copies;
-	  };
+	        r = s + 1;
+	        c = newCandidate;
 
-	  return action;
-	}
+	        if (r === candidates.length) {
+	          break; // no point in examining further (j)s
+	        }
+	      }
+	    }
 
-	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;
-	  };
-	}
+	    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].
 
-	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 = {};
+	  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.
 
-	      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];
-	        }
-	      }
+	function diffIndices(buffer1, buffer2) {
+	  var lcs = LCS(buffer1, buffer2);
+	  var result = [];
+	  var tail1 = buffer1.length;
+	  var tail2 = buffer2.length;
 
-	      if (didDiscard) {
-	        graph = graph.replace(entity.update({
-	          tags: tags
-	        }));
-	      }
+	  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;
+	} // 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
 	//
-	// 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`.
+	// 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.
 	//
-	// 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
+	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
 	//
 
-	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);
+	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 = [];
 
-	      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;
-	  };
+	  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])
 
-	  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];
+	  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;
 
-	      if (wayIds && wayIds.indexOf(way.id) === -1) {
-	        keeping = true;
-	        continue;
-	      }
+	  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 (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];
+	  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
 
-	          if (waynode === nodeId) {
-	            if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
-	              continue;
-	            }
+	    while (hunks.length) {
+	      var nextHunk = hunks[0];
+	      var nextHunkStart = nextHunk.oStart;
+	      if (nextHunkStart > regionEnd) break; // no overlap
 
-	            candidates.push({
-	              wayID: way.id,
-	              index: j
-	            });
-	          }
-	        }
-	      }
+	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+	      regionHunks.push(hunks.shift());
 	    }
 
-	    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';
-	  };
+	    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]
+	      };
 
-	  action.limitWays = function (val) {
-	    if (!arguments.length) return wayIds;
-	    wayIds = val;
-	    return action;
-	  };
+	      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]);
+	      }
 
-	  return action;
-	}
+	      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);
+	    }
 
-	function actionExtract(entityID) {
-	  var extractedNodeID;
+	    currOffset = regionEnd;
+	  }
 
-	  var action = function action(graph) {
-	    var entity = graph.entity(entityID);
+	  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`
 
-	    if (entity.type === 'node') {
-	      return extractFromNode(entity, graph);
-	    }
 
-	    return extractFromWayOrRelation(entity, graph);
+	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 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
+	  function flushOk() {
+	    if (okBuffer.length) {
+	      results.push({
+	        ok: okBuffer
+	      });
+	    }
 
-	    return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
-	      return accGraph.replace(parentRel.replaceMember(node, replacement));
-	    }, graph);
+	    okBuffer = [];
 	  }
 
-	  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));
+	  function isFalseConflict(a, b) {
+	    if (a.length !== b.length) return false;
 
-	    if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-	      extractedLoc = entity.extent(graph).center();
+	    for (var i = 0; i < a.length; i++) {
+	      if (a[i] !== b[i]) return false;
 	    }
 
-	    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
+	    return true;
+	  }
 
-	    var pointTags = {};
+	  regions.forEach(function (region) {
+	    if (region.stable) {
+	      var _okBuffer;
 
-	    for (var key in entityTags) {
-	      if (entity.type === 'relation' && key === 'type') {
-	        continue;
-	      }
+	      (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+	    } else {
+	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+	        var _okBuffer2;
 
-	      if (keysToRetain.indexOf(key) !== -1) {
-	        continue;
+	        (_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
+	          }
+	        });
 	      }
+	    }
+	  });
+	  flushOk();
+	  return results;
+	}
 
-	      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
+	var lodash = {exports: {}};
 
+	(function (module, exports) {
+	  (function () {
+	    /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+	    var undefined$1;
+	    /** Used as the semantic version number. */
+
+	    var VERSION = '4.17.21';
+	    /** Used as the size to enable large array optimizations. */
+
+	    var LARGE_ARRAY_SIZE = 200;
+	    /** Error message constants. */
+
+	    var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
+	        FUNC_ERROR_TEXT = 'Expected a function',
+	        INVALID_TEMPL_VAR_ERROR_TEXT = 'Invalid `variable` option passed into `_.template`';
+	    /** Used to stand-in for `undefined` hash values. */
+
+	    var HASH_UNDEFINED = '__lodash_hash_undefined__';
+	    /** Used as the maximum memoize cache size. */
+
+	    var MAX_MEMOIZE_SIZE = 500;
+	    /** Used as the internal argument placeholder. */
+
+	    var PLACEHOLDER = '__lodash_placeholder__';
+	    /** Used to compose bitmasks for cloning. */
+
+	    var CLONE_DEEP_FLAG = 1,
+	        CLONE_FLAT_FLAG = 2,
+	        CLONE_SYMBOLS_FLAG = 4;
+	    /** Used to compose bitmasks for value comparisons. */
+
+	    var COMPARE_PARTIAL_FLAG = 1,
+	        COMPARE_UNORDERED_FLAG = 2;
+	    /** Used to compose bitmasks for function metadata. */
+
+	    var WRAP_BIND_FLAG = 1,
+	        WRAP_BIND_KEY_FLAG = 2,
+	        WRAP_CURRY_BOUND_FLAG = 4,
+	        WRAP_CURRY_FLAG = 8,
+	        WRAP_CURRY_RIGHT_FLAG = 16,
+	        WRAP_PARTIAL_FLAG = 32,
+	        WRAP_PARTIAL_RIGHT_FLAG = 64,
+	        WRAP_ARY_FLAG = 128,
+	        WRAP_REARG_FLAG = 256,
+	        WRAP_FLIP_FLAG = 512;
+	    /** Used as default options for `_.truncate`. */
+
+	    var DEFAULT_TRUNC_LENGTH = 30,
+	        DEFAULT_TRUNC_OMISSION = '...';
+	    /** Used to detect hot functions by number of calls within a span of milliseconds. */
+
+	    var HOT_COUNT = 800,
+	        HOT_SPAN = 16;
+	    /** Used to indicate the type of lazy iteratees. */
+
+	    var LAZY_FILTER_FLAG = 1,
+	        LAZY_MAP_FLAG = 2,
+	        LAZY_WHILE_FLAG = 3;
+	    /** Used as references for various `Number` constants. */
+
+	    var INFINITY = 1 / 0,
+	        MAX_SAFE_INTEGER = 9007199254740991,
+	        MAX_INTEGER = 1.7976931348623157e+308,
+	        NAN = 0 / 0;
+	    /** Used as references for the maximum length and index of an array. */
+
+	    var MAX_ARRAY_LENGTH = 4294967295,
+	        MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
+	        HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
+	    /** Used to associate wrap methods with their bit flags. */
+
+	    var wrapFlags = [['ary', WRAP_ARY_FLAG], ['bind', WRAP_BIND_FLAG], ['bindKey', WRAP_BIND_KEY_FLAG], ['curry', WRAP_CURRY_FLAG], ['curryRight', WRAP_CURRY_RIGHT_FLAG], ['flip', WRAP_FLIP_FLAG], ['partial', WRAP_PARTIAL_FLAG], ['partialRight', WRAP_PARTIAL_RIGHT_FLAG], ['rearg', WRAP_REARG_FLAG]];
+	    /** `Object#toString` result references. */
+
+	    var argsTag = '[object Arguments]',
+	        arrayTag = '[object Array]',
+	        asyncTag = '[object AsyncFunction]',
+	        boolTag = '[object Boolean]',
+	        dateTag = '[object Date]',
+	        domExcTag = '[object DOMException]',
+	        errorTag = '[object Error]',
+	        funcTag = '[object Function]',
+	        genTag = '[object GeneratorFunction]',
+	        mapTag = '[object Map]',
+	        numberTag = '[object Number]',
+	        nullTag = '[object Null]',
+	        objectTag = '[object Object]',
+	        promiseTag = '[object Promise]',
+	        proxyTag = '[object Proxy]',
+	        regexpTag = '[object RegExp]',
+	        setTag = '[object Set]',
+	        stringTag = '[object String]',
+	        symbolTag = '[object Symbol]',
+	        undefinedTag = '[object Undefined]',
+	        weakMapTag = '[object WeakMap]',
+	        weakSetTag = '[object WeakSet]';
+	    var arrayBufferTag = '[object ArrayBuffer]',
+	        dataViewTag = '[object DataView]',
+	        float32Tag = '[object Float32Array]',
+	        float64Tag = '[object Float64Array]',
+	        int8Tag = '[object Int8Array]',
+	        int16Tag = '[object Int16Array]',
+	        int32Tag = '[object Int32Array]',
+	        uint8Tag = '[object Uint8Array]',
+	        uint8ClampedTag = '[object Uint8ClampedArray]',
+	        uint16Tag = '[object Uint16Array]',
+	        uint32Tag = '[object Uint32Array]';
+	    /** Used to match empty string literals in compiled template source. */
+
+	    var reEmptyStringLeading = /\b__p \+= '';/g,
+	        reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+	        reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
+	    /** Used to match HTML entities and HTML characters. */
+
+	    var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+	        reUnescapedHtml = /[&<>"']/g,
+	        reHasEscapedHtml = RegExp(reEscapedHtml.source),
+	        reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+	    /** Used to match template delimiters. */
+
+	    var reEscape = /<%-([\s\S]+?)%>/g,
+	        reEvaluate = /<%([\s\S]+?)%>/g,
+	        reInterpolate = /<%=([\s\S]+?)%>/g;
+	    /** Used to match property names within property paths. */
+
+	    var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+	        reIsPlainProp = /^\w*$/,
+	        rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
+	    /**
+	     * Used to match `RegExp`
+	     * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+	     */
 
-	      if (isIndoorArea && key === 'indoor') {
-	        continue;
-	      } // copy the tag from the entity to the point
+	    var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
+	        reHasRegExpChar = RegExp(reRegExpChar.source);
+	    /** Used to match leading whitespace. */
 
+	    var reTrimStart = /^\s+/;
+	    /** Used to match a single whitespace character. */
 
-	      pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
+	    var reWhitespace = /\s/;
+	    /** Used to match wrap detail comments. */
 
-	      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
+	    var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
+	        reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
+	        reSplitDetails = /,? & /;
+	    /** Used to match words composed of alphanumeric characters. */
 
+	    var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
+	    /**
+	     * Used to validate the `validate` option in `_.template` variable.
+	     *
+	     * Forbids characters which could potentially change the meaning of the function argument definition:
+	     * - "()," (modification of function parameters)
+	     * - "=" (default value)
+	     * - "[]{}" (destructuring of function parameters)
+	     * - "/" (beginning of a comment)
+	     * - whitespace
+	     */
 
-	      delete entityTags[key];
-	    }
+	    var reForbiddenIdentifierChars = /[()=,{}\[\]\/\s]/;
+	    /** Used to match backslashes in property paths. */
 
-	    if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
-	      // ensure that areas keep area geometry
-	      entityTags.area = 'yes';
-	    }
+	    var reEscapeChar = /\\(\\)?/g;
+	    /**
+	     * Used to match
+	     * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+	     */
 
-	    var replacement = osmNode({
-	      loc: extractedLoc,
-	      tags: pointTags
-	    });
-	    graph = graph.replace(replacement);
-	    extractedNodeID = replacement.id;
-	    return graph.replace(entity.update({
-	      tags: entityTags
-	    }));
-	  }
+	    var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+	    /** Used to match `RegExp` flags from their coerced string values. */
+
+	    var reFlags = /\w*$/;
+	    /** Used to detect bad signed hexadecimal string values. */
+
+	    var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	    /** Used to detect binary string values. */
+
+	    var reIsBinary = /^0b[01]+$/i;
+	    /** Used to detect host constructors (Safari). */
+
+	    var reIsHostCtor = /^\[object .+?Constructor\]$/;
+	    /** Used to detect octal string values. */
+
+	    var reIsOctal = /^0o[0-7]+$/i;
+	    /** Used to detect unsigned integer values. */
+
+	    var reIsUint = /^(?:0|[1-9]\d*)$/;
+	    /** Used to match Latin Unicode letters (excluding mathematical operators). */
+
+	    var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
+	    /** Used to ensure capturing order of template delimiters. */
+
+	    var reNoMatch = /($^)/;
+	    /** Used to match unescaped characters in compiled string literals. */
+
+	    var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
+	    /** Used to compose unicode character classes. */
+
+	    var rsAstralRange = "\\ud800-\\udfff",
+	        rsComboMarksRange = "\\u0300-\\u036f",
+	        reComboHalfMarksRange = "\\ufe20-\\ufe2f",
+	        rsComboSymbolsRange = "\\u20d0-\\u20ff",
+	        rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
+	        rsDingbatRange = "\\u2700-\\u27bf",
+	        rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
+	        rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
+	        rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
+	        rsPunctuationRange = "\\u2000-\\u206f",
+	        rsSpaceRange = " \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000",
+	        rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
+	        rsVarRange = "\\ufe0e\\ufe0f",
+	        rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
+	    /** Used to compose unicode capture groups. */
+
+	    var rsApos = "['\u2019]",
+	        rsAstral = '[' + rsAstralRange + ']',
+	        rsBreak = '[' + rsBreakRange + ']',
+	        rsCombo = '[' + rsComboRange + ']',
+	        rsDigits = '\\d+',
+	        rsDingbat = '[' + rsDingbatRange + ']',
+	        rsLower = '[' + rsLowerRange + ']',
+	        rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
+	        rsFitz = "\\ud83c[\\udffb-\\udfff]",
+	        rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+	        rsNonAstral = '[^' + rsAstralRange + ']',
+	        rsRegional = "(?:\\ud83c[\\udde6-\\uddff]){2}",
+	        rsSurrPair = "[\\ud800-\\udbff][\\udc00-\\udfff]",
+	        rsUpper = '[' + rsUpperRange + ']',
+	        rsZWJ = "\\u200d";
+	    /** Used to compose unicode regexes. */
+
+	    var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
+	        rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
+	        rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
+	        rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
+	        reOptMod = rsModifier + '?',
+	        rsOptVar = '[' + rsVarRange + ']?',
+	        rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+	        rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
+	        rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
+	        rsSeq = rsOptVar + reOptMod + rsOptJoin,
+	        rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
+	        rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+	    /** Used to match apostrophes. */
+
+	    var reApos = RegExp(rsApos, 'g');
+	    /**
+	     * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
+	     * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
+	     */
 
-	  action.getExtractedNodeID = function () {
-	    return extractedNodeID;
-	  };
+	    var reComboMark = RegExp(rsCombo, 'g');
+	    /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+
+	    var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+	    /** Used to match complex or compound words. */
+
+	    var reUnicodeWord = RegExp([rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')', rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')', rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower, rsUpper + '+' + rsOptContrUpper, rsOrdUpper, rsOrdLower, rsDigits, rsEmoji].join('|'), 'g');
+	    /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
+
+	    var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
+	    /** Used to detect strings that need a more robust regexp to match words. */
+
+	    var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+	    /** Used to assign default `context` object properties. */
+
+	    var contextProps = ['Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array', 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object', 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'];
+	    /** Used to make template sourceURLs easier to identify. */
+
+	    var templateCounter = -1;
+	    /** Used to identify `toStringTag` values of typed arrays. */
+
+	    var typedArrayTags = {};
+	    typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = typedArrayTags[uint32Tag] = true;
+	    typedArrayTags[argsTag] = typedArrayTags[arrayTag] = typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = typedArrayTags[errorTag] = typedArrayTags[funcTag] = typedArrayTags[mapTag] = typedArrayTags[numberTag] = typedArrayTags[objectTag] = typedArrayTags[regexpTag] = typedArrayTags[setTag] = typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false;
+	    /** Used to identify `toStringTag` values supported by `_.clone`. */
+
+	    var cloneableTags = {};
+	    cloneableTags[argsTag] = cloneableTags[arrayTag] = cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] = cloneableTags[boolTag] = cloneableTags[dateTag] = cloneableTags[float32Tag] = cloneableTags[float64Tag] = cloneableTags[int8Tag] = cloneableTags[int16Tag] = cloneableTags[int32Tag] = cloneableTags[mapTag] = cloneableTags[numberTag] = cloneableTags[objectTag] = cloneableTags[regexpTag] = cloneableTags[setTag] = cloneableTags[stringTag] = cloneableTags[symbolTag] = cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+	    cloneableTags[errorTag] = cloneableTags[funcTag] = cloneableTags[weakMapTag] = false;
+	    /** Used to map Latin Unicode letters to basic Latin letters. */
+
+	    var deburredLetters = {
+	      // Latin-1 Supplement block.
+	      '\xc0': 'A',
+	      '\xc1': 'A',
+	      '\xc2': 'A',
+	      '\xc3': 'A',
+	      '\xc4': 'A',
+	      '\xc5': 'A',
+	      '\xe0': 'a',
+	      '\xe1': 'a',
+	      '\xe2': 'a',
+	      '\xe3': 'a',
+	      '\xe4': 'a',
+	      '\xe5': 'a',
+	      '\xc7': 'C',
+	      '\xe7': 'c',
+	      '\xd0': 'D',
+	      '\xf0': 'd',
+	      '\xc8': 'E',
+	      '\xc9': 'E',
+	      '\xca': 'E',
+	      '\xcb': 'E',
+	      '\xe8': 'e',
+	      '\xe9': 'e',
+	      '\xea': 'e',
+	      '\xeb': 'e',
+	      '\xcc': 'I',
+	      '\xcd': 'I',
+	      '\xce': 'I',
+	      '\xcf': 'I',
+	      '\xec': 'i',
+	      '\xed': 'i',
+	      '\xee': 'i',
+	      '\xef': 'i',
+	      '\xd1': 'N',
+	      '\xf1': 'n',
+	      '\xd2': 'O',
+	      '\xd3': 'O',
+	      '\xd4': 'O',
+	      '\xd5': 'O',
+	      '\xd6': 'O',
+	      '\xd8': 'O',
+	      '\xf2': 'o',
+	      '\xf3': 'o',
+	      '\xf4': 'o',
+	      '\xf5': 'o',
+	      '\xf6': 'o',
+	      '\xf8': 'o',
+	      '\xd9': 'U',
+	      '\xda': 'U',
+	      '\xdb': 'U',
+	      '\xdc': 'U',
+	      '\xf9': 'u',
+	      '\xfa': 'u',
+	      '\xfb': 'u',
+	      '\xfc': 'u',
+	      '\xdd': 'Y',
+	      '\xfd': 'y',
+	      '\xff': 'y',
+	      '\xc6': 'Ae',
+	      '\xe6': 'ae',
+	      '\xde': 'Th',
+	      '\xfe': 'th',
+	      '\xdf': 'ss',
+	      // Latin Extended-A block.
+	      "\u0100": 'A',
+	      "\u0102": 'A',
+	      "\u0104": 'A',
+	      "\u0101": 'a',
+	      "\u0103": 'a',
+	      "\u0105": 'a',
+	      "\u0106": 'C',
+	      "\u0108": 'C',
+	      "\u010A": 'C',
+	      "\u010C": 'C',
+	      "\u0107": 'c',
+	      "\u0109": 'c',
+	      "\u010B": 'c',
+	      "\u010D": 'c',
+	      "\u010E": 'D',
+	      "\u0110": 'D',
+	      "\u010F": 'd',
+	      "\u0111": 'd',
+	      "\u0112": 'E',
+	      "\u0114": 'E',
+	      "\u0116": 'E',
+	      "\u0118": 'E',
+	      "\u011A": 'E',
+	      "\u0113": 'e',
+	      "\u0115": 'e',
+	      "\u0117": 'e',
+	      "\u0119": 'e',
+	      "\u011B": 'e',
+	      "\u011C": 'G',
+	      "\u011E": 'G',
+	      "\u0120": 'G',
+	      "\u0122": 'G',
+	      "\u011D": 'g',
+	      "\u011F": 'g',
+	      "\u0121": 'g',
+	      "\u0123": 'g',
+	      "\u0124": 'H',
+	      "\u0126": 'H',
+	      "\u0125": 'h',
+	      "\u0127": 'h',
+	      "\u0128": 'I',
+	      "\u012A": 'I',
+	      "\u012C": 'I',
+	      "\u012E": 'I',
+	      "\u0130": 'I',
+	      "\u0129": 'i',
+	      "\u012B": 'i',
+	      "\u012D": 'i',
+	      "\u012F": 'i',
+	      "\u0131": 'i',
+	      "\u0134": 'J',
+	      "\u0135": 'j',
+	      "\u0136": 'K',
+	      "\u0137": 'k',
+	      "\u0138": 'k',
+	      "\u0139": 'L',
+	      "\u013B": 'L',
+	      "\u013D": 'L',
+	      "\u013F": 'L',
+	      "\u0141": 'L',
+	      "\u013A": 'l',
+	      "\u013C": 'l',
+	      "\u013E": 'l',
+	      "\u0140": 'l',
+	      "\u0142": 'l',
+	      "\u0143": 'N',
+	      "\u0145": 'N',
+	      "\u0147": 'N',
+	      "\u014A": 'N',
+	      "\u0144": 'n',
+	      "\u0146": 'n',
+	      "\u0148": 'n',
+	      "\u014B": 'n',
+	      "\u014C": 'O',
+	      "\u014E": 'O',
+	      "\u0150": 'O',
+	      "\u014D": 'o',
+	      "\u014F": 'o',
+	      "\u0151": 'o',
+	      "\u0154": 'R',
+	      "\u0156": 'R',
+	      "\u0158": 'R',
+	      "\u0155": 'r',
+	      "\u0157": 'r',
+	      "\u0159": 'r',
+	      "\u015A": 'S',
+	      "\u015C": 'S',
+	      "\u015E": 'S',
+	      "\u0160": 'S',
+	      "\u015B": 's',
+	      "\u015D": 's',
+	      "\u015F": 's',
+	      "\u0161": 's',
+	      "\u0162": 'T',
+	      "\u0164": 'T',
+	      "\u0166": 'T',
+	      "\u0163": 't',
+	      "\u0165": 't',
+	      "\u0167": 't',
+	      "\u0168": 'U',
+	      "\u016A": 'U',
+	      "\u016C": 'U',
+	      "\u016E": 'U',
+	      "\u0170": 'U',
+	      "\u0172": 'U',
+	      "\u0169": 'u',
+	      "\u016B": 'u',
+	      "\u016D": 'u',
+	      "\u016F": 'u',
+	      "\u0171": 'u',
+	      "\u0173": 'u',
+	      "\u0174": 'W',
+	      "\u0175": 'w',
+	      "\u0176": 'Y',
+	      "\u0177": 'y',
+	      "\u0178": 'Y',
+	      "\u0179": 'Z',
+	      "\u017B": 'Z',
+	      "\u017D": 'Z',
+	      "\u017A": 'z',
+	      "\u017C": 'z',
+	      "\u017E": 'z',
+	      "\u0132": 'IJ',
+	      "\u0133": 'ij',
+	      "\u0152": 'Oe',
+	      "\u0153": 'oe',
+	      "\u0149": "'n",
+	      "\u017F": 's'
+	    };
+	    /** Used to map characters to HTML entities. */
+
+	    var htmlEscapes = {
+	      '&': '&amp;',
+	      '<': '&lt;',
+	      '>': '&gt;',
+	      '"': '&quot;',
+	      "'": '&#39;'
+	    };
+	    /** Used to map HTML entities to characters. */
+
+	    var htmlUnescapes = {
+	      '&amp;': '&',
+	      '&lt;': '<',
+	      '&gt;': '>',
+	      '&quot;': '"',
+	      '&#39;': "'"
+	    };
+	    /** Used to escape characters for inclusion in compiled string literals. */
+
+	    var stringEscapes = {
+	      '\\': '\\',
+	      "'": "'",
+	      '\n': 'n',
+	      '\r': 'r',
+	      "\u2028": 'u2028',
+	      "\u2029": 'u2029'
+	    };
+	    /** Built-in method references without a dependency on `root`. */
 
-	  return action;
-	}
+	    var freeParseFloat = parseFloat,
+	        freeParseInt = parseInt;
+	    /** Detect free variable `global` from Node.js. */
 
-	//
-	// 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 freeGlobal = _typeof(commonjsGlobal) == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
+	    /** Detect free variable `self`. */
 
-	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 freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+	    /** Used as a reference to the global object. */
 
-	  var action = function action(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
+	    var root = freeGlobal || freeSelf || Function('return this')();
+	    /** Detect free variable `exports`. */
 
-	    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.
+	    var freeExports = exports && !exports.nodeType && exports;
+	    /** Detect free variable `module`. */
 
-	    for (var i = 0; i < ways.length; i++) {
-	      if (!ways[i].isNew()) {
-	        survivorID = ways[i].id;
-	        break;
-	      }
-	    }
+	    var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;
+	    /** Detect the popular CommonJS extension `module.exports`. */
 
-	    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.
+	    var moduleExports = freeModule && freeModule.exports === freeExports;
+	    /** Detect free variable `process` from Node.js. */
 
-	    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
+	    var freeProcess = moduleExports && freeGlobal.process;
+	    /** Used to access faster Node.js helpers. */
 
-	    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
+	    var nodeUtil = function () {
+	      try {
+	        // Use `util.types` for Node.js 10+.
+	        var types = freeModule && freeModule.require && freeModule.require('util').types;
 
-	      if (multipolygons.length !== 1) return;
-	      var multipolygon = multipolygons[0];
+	        if (types) {
+	          return types;
+	        } // Legacy `process.binding('util')` for Node.js < 10.
 
-	      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);
+	        return freeProcess && freeProcess.binding && freeProcess.binding('util');
+	      } catch (e) {}
+	    }();
+	    /* Node.js helper references. */
 
-	      if (survivor.geometry(graph) !== 'area') {
-	        // ensure the feature persists as an area
-	        tags.area = 'yes';
-	      }
 
-	      delete tags.type; // remove type=multipolygon
+	    var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
+	        nodeIsDate = nodeUtil && nodeUtil.isDate,
+	        nodeIsMap = nodeUtil && nodeUtil.isMap,
+	        nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
+	        nodeIsSet = nodeUtil && nodeUtil.isSet,
+	        nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+	    /*--------------------------------------------------------------------------*/
 
-	      survivor = survivor.update({
-	        tags: tags
-	      });
-	      graph = graph.replace(survivor);
-	    }
+	    /**
+	     * A faster alternative to `Function#apply`, this function invokes `func`
+	     * with the `this` binding of `thisArg` and the arguments of `args`.
+	     *
+	     * @private
+	     * @param {Function} func The function to invoke.
+	     * @param {*} thisArg The `this` binding of `func`.
+	     * @param {Array} args The arguments to invoke `func` with.
+	     * @returns {*} Returns the result of `func`.
+	     */
 
-	    checkForSimpleMultipolygon();
-	    return graph;
-	  }; // Returns the number of nodes the resultant way is expected to have
+	    function apply(func, thisArg, args) {
+	      switch (args.length) {
+	        case 0:
+	          return func.call(thisArg);
 
+	        case 1:
+	          return func.call(thisArg, args[0]);
 
-	  action.resultingWayNodesLength = function (graph) {
-	    return ids.reduce(function (count, id) {
-	      return count + graph.entity(id).nodes.length;
-	    }, 0) - ids.length - 1;
-	  };
+	        case 2:
+	          return func.call(thisArg, args[0], args[1]);
 
-	  action.disabled = function (graph) {
-	    var geometries = groupEntitiesByGeometry(graph);
+	        case 3:
+	          return func.call(thisArg, args[0], args[1], args[2]);
+	      }
 
-	    if (ids.length < 2 || ids.length !== geometries.line.length) {
-	      return 'not_eligible';
+	      return func.apply(thisArg, args);
 	    }
+	    /**
+	     * A specialized version of `baseAggregator` for arrays.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} setter The function to set `accumulator` values.
+	     * @param {Function} iteratee The iteratee to transform keys.
+	     * @param {Object} accumulator The initial aggregated object.
+	     * @returns {Function} Returns `accumulator`.
+	     */
 
-	    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
+	    function arrayAggregator(array, setter, iteratee, accumulator) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
+	      while (++index < length) {
+	        var value = array[index];
+	        setter(accumulator, value, iteratee(value), array);
+	      }
 
-	    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
+	      return accumulator;
+	    }
+	    /**
+	     * A specialized version of `_.forEach` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	        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';
+	    function arrayEach(array, iteratee) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
+
+	      while (++index < length) {
+	        if (iteratee(array[index], index, array) === false) {
+	          break;
 	        }
 	      }
+
+	      return array;
 	    }
+	    /**
+	     * A specialized version of `_.forEachRight` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	    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;
+	    function arrayEachRight(array, iteratee) {
+	      var length = array == null ? 0 : array.length;
+
+	      while (length--) {
+	        if (iteratee(array[length], length, array) === false) {
+	          break;
 	        }
 	      }
-	    });
 
-	    if (relation) {
-	      return 'restriction';
+	      return array;
 	    }
+	    /**
+	     * A specialized version of `_.every` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @returns {boolean} Returns `true` if all elements pass the predicate check,
+	     *  else `false`.
+	     */
 
-	    if (conflicting) {
-	      return 'conflicting_tags';
-	    }
-	  };
 
-	  return action;
-	}
+	    function arrayEvery(array, predicate) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	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);
-	    }));
-	  }
+	      while (++index < length) {
+	        if (!predicate(array[index], index, array)) {
+	          return false;
+	        }
+	      }
 
-	  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;
+	      return true;
+	    }
+	    /**
+	     * A specialized version of `_.filter` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @returns {Array} Returns the new filtered array.
+	     */
 
-	      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
+	    function arrayFilter(array, predicate) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length,
+	          resIndex = 0,
+	          result = [];
 
+	      while (++index < length) {
+	        var value = array[index];
 
-	        graph = graph.replace(point.update({
-	          tags: {},
-	          loc: node.loc
-	        }));
-	        target = target.replaceNode(node.id, point.id);
-	        graph = graph.replace(target);
-	        removeNode = node;
-	        break;
+	        if (predicate(value, index, array)) {
+	          result[resIndex++] = value;
+	        }
 	      }
 
-	      graph = graph.remove(removeNode);
-	    });
-
-	    if (target.tags.area === 'yes') {
-	      var tags = Object.assign({}, target.tags); // shallow copy
+	      return result;
+	    }
+	    /**
+	     * A specialized version of `_.includes` for arrays without support for
+	     * specifying an index to search from.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to inspect.
+	     * @param {*} target The value to search for.
+	     * @returns {boolean} Returns `true` if `target` is found, else `false`.
+	     */
 
-	      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);
-	      }
+	    function arrayIncludes(array, value) {
+	      var length = array == null ? 0 : array.length;
+	      return !!length && baseIndexOf(array, value, 0) > -1;
 	    }
+	    /**
+	     * This function is like `arrayIncludes` except that it accepts a comparator.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to inspect.
+	     * @param {*} target The value to search for.
+	     * @param {Function} comparator The comparator invoked per element.
+	     * @returns {boolean} Returns `true` if `target` is found, else `false`.
+	     */
 
-	    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';
-	    }
-	  };
+	    function arrayIncludesWith(array, value, comparator) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	  return action;
-	}
+	      while (++index < length) {
+	        if (comparator(value, array[index])) {
+	          return true;
+	        }
+	      }
 
-	//
-	// 1. move all the nodes to a common location
-	// 2. `actionConnect` them
+	      return false;
+	    }
+	    /**
+	     * A specialized version of `_.map` for arrays without support for iteratee
+	     * shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns the new mapped array.
+	     */
 
-	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]);
+	    function arrayMap(array, iteratee) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length,
+	          result = Array(length);
 
-	      if (node.hasInterestingTags()) {
-	        interestingLoc = ++interestingCount === 1 ? node.loc : null;
+	      while (++index < length) {
+	        result[index] = iteratee(array[index], index, array);
 	      }
 
-	      sum = geoVecAdd(sum, node.loc);
+	      return result;
 	    }
+	    /**
+	     * Appends the elements of `values` to `array`.
+	     *
+	     * @private
+	     * @param {Array} array The array to modify.
+	     * @param {Array} values The values to append.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	    return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-	  }
 
-	  var action = function action(graph) {
-	    if (nodeIDs.length < 2) return graph;
-	    var toLoc = loc;
+	    function arrayPush(array, values) {
+	      var index = -1,
+	          length = values.length,
+	          offset = array.length;
 
-	    if (!toLoc) {
-	      toLoc = chooseLoc(graph);
+	      while (++index < length) {
+	        array[offset + index] = values[index];
+	      }
+
+	      return array;
 	    }
+	    /**
+	     * A specialized version of `_.reduce` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @param {*} [accumulator] The initial value.
+	     * @param {boolean} [initAccum] Specify using the first element of `array` as
+	     *  the initial value.
+	     * @returns {*} Returns the accumulated value.
+	     */
 
-	    for (var i = 0; i < nodeIDs.length; i++) {
-	      var node = graph.entity(nodeIDs[i]);
 
-	      if (node.loc !== toLoc) {
-	        graph = graph.replace(node.move(toLoc));
-	      }
-	    }
+	    function arrayReduce(array, iteratee, accumulator, initAccum) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	    return actionConnect(nodeIDs)(graph);
-	  };
+	      if (initAccum && length) {
+	        accumulator = array[++index];
+	      }
 
-	  action.disabled = function (graph) {
-	    if (nodeIDs.length < 2) return 'not_eligible';
+	      while (++index < length) {
+	        accumulator = iteratee(accumulator, array[index], index, array);
+	      }
 
-	    for (var i = 0; i < nodeIDs.length; i++) {
-	      var entity = graph.entity(nodeIDs[i]);
-	      if (entity.type !== 'node') return 'not_eligible';
+	      return accumulator;
 	    }
+	    /**
+	     * A specialized version of `_.reduceRight` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @param {*} [accumulator] The initial value.
+	     * @param {boolean} [initAccum] Specify using the last element of `array` as
+	     *  the initial value.
+	     * @returns {*} Returns the accumulated value.
+	     */
 
-	    return actionConnect(nodeIDs).disabled(graph);
-	  };
 
-	  return action;
-	}
+	    function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+	      var length = array == null ? 0 : array.length;
 
-	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'
-	        }
+	      if (initAccum && length) {
+	        accumulator = array[--length];
 	      }
-	    };
-	  },
-	  // 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 = {};
+	      while (length--) {
+	        accumulator = iteratee(accumulator, array[length], length, array);
+	      }
+
+	      return accumulator;
+	    }
+	    /**
+	     * A specialized version of `_.some` for arrays without support for iteratee
+	     * shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @returns {boolean} Returns `true` if any element passes the predicate check,
+	     *  else `false`.
+	     */
+
 
-	      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]);
+	    function arraySome(array, predicate) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
+
+	      while (++index < length) {
+	        if (predicate(array[index], index, array)) {
+	          return true;
+	        }
 	      }
 
-	      var ordered = {};
-	      order.forEach(function (o) {
-	        if (groups[o]) ordered[o] = groups[o];
-	      });
-	      return ordered;
-	    } // sort relations in a changeset by dependencies
+	      return false;
+	    }
+	    /**
+	     * Gets the size of an ASCII `string`.
+	     *
+	     * @private
+	     * @param {string} string The string inspect.
+	     * @returns {number} Returns the string size.
+	     */
 
 
-	    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
+	    var asciiSize = baseProperty('length');
+	    /**
+	     * Converts an ASCII `string` to an array.
+	     *
+	     * @private
+	     * @param {string} string The string to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
+	    function asciiToArray(string) {
+	      return string.split('');
+	    }
+	    /**
+	     * Splits an ASCII `string` into an array of its words.
+	     *
+	     * @private
+	     * @param {string} The string to inspect.
+	     * @returns {Array} Returns the words of `string`.
+	     */
 
-	      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;
+	    function asciiWords(string) {
+	      return string.match(reAsciiWord) || [];
+	    }
+	    /**
+	     * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+	     * without support for iteratee shorthands, which iterates over `collection`
+	     * using `eachFunc`.
+	     *
+	     * @private
+	     * @param {Array|Object} collection The collection to inspect.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @param {Function} eachFunc The function to iterate over `collection`.
+	     * @returns {*} Returns the found element or its key, else `undefined`.
+	     */
 
-	      for (var i = 0; i < relations.length; i++) {
-	        var relation = relations[i]; // skip relation if already sorted
 
-	        if (!sorted[relation['@id']]) {
-	          processing.push(relation);
+	    function baseFindKey(collection, predicate, eachFunc) {
+	      var result;
+	      eachFunc(collection, function (value, key, collection) {
+	        if (predicate(value, key, collection)) {
+	          result = key;
+	          return false;
 	        }
+	      });
+	      return result;
+	    }
+	    /**
+	     * The base implementation of `_.findIndex` and `_.findLastIndex` without
+	     * support for iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @param {number} fromIndex The index to search from.
+	     * @param {boolean} [fromRight] Specify iterating from right to left.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
-	        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);
-	          }
+	    function baseFindIndex(array, predicate, fromIndex, fromRight) {
+	      var length = array.length,
+	          index = fromIndex + (fromRight ? 1 : -1);
+
+	      while (fromRight ? index-- : ++index < length) {
+	        if (predicate(array[index], index, array)) {
+	          return index;
 	        }
 	      }
 
-	      changes.relation = Object.values(sorted);
-	      return changes;
-	    }
-
-	    function rep(entity) {
-	      return entity.asJXON(changeset_id);
+	      return -1;
 	    }
+	    /**
+	     * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
-	    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 osmNote() {
-	  if (!(this instanceof osmNote)) {
-	    return new osmNote().initialize(arguments);
-	  } else if (arguments.length) {
-	    this.initialize(arguments);
-	  }
-	}
+	    function baseIndexOf(array, value, fromIndex) {
+	      return value === value ? strictIndexOf(array, value, fromIndex) : baseFindIndex(array, baseIsNaN, fromIndex);
+	    }
+	    /**
+	     * This function is like `baseIndexOf` except that it accepts a comparator.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @param {Function} comparator The comparator invoked per element.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
-	osmNote.id = function () {
-	  return osmNote.id.next--;
-	};
 
-	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];
+	    function baseIndexOfWith(array, value, fromIndex, comparator) {
+	      var index = fromIndex - 1,
+	          length = array.length;
 
-	      for (var prop in source) {
-	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	          if (source[prop] === undefined) {
-	            delete this[prop];
-	          } else {
-	            this[prop] = source[prop];
-	          }
+	      while (++index < length) {
+	        if (comparator(array[index], value)) {
+	          return index;
 	        }
 	      }
+
+	      return -1;
 	    }
+	    /**
+	     * The base implementation of `_.isNaN` without support for number objects.
+	     *
+	     * @private
+	     * @param {*} value The value to check.
+	     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+	     */
 
-	    if (!this.id) {
-	      this.id = osmNote.id().toString();
+
+	    function baseIsNaN(value) {
+	      return value !== value;
 	    }
+	    /**
+	     * The base implementation of `_.mean` and `_.meanBy` without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} array The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {number} Returns the mean.
+	     */
 
-	    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
-	    });
-	  }
-	});
 
-	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);
+	    function baseMean(array, iteratee) {
+	      var length = array == null ? 0 : array.length;
+	      return length ? baseSum(array, iteratee) / length : NAN;
+	    }
+	    /**
+	     * The base implementation of `_.property` without support for deep paths.
+	     *
+	     * @private
+	     * @param {string} key The key of the property to get.
+	     * @returns {Function} Returns the new accessor function.
+	     */
 
-	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 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();
+	    function baseProperty(key) {
+	      return function (object) {
+	        return object == null ? undefined$1 : object[key];
+	      };
+	    }
+	    /**
+	     * The base implementation of `_.propertyOf` without support for deep paths.
+	     *
+	     * @private
+	     * @param {Object} object The object to query.
+	     * @returns {Function} Returns the new accessor function.
+	     */
 
-	      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));
-	        }
-	      }
+	    function basePropertyOf(object) {
+	      return function (key) {
+	        return object == null ? undefined$1 : object[key];
+	      };
+	    }
+	    /**
+	     * The base implementation of `_.reduce` and `_.reduceRight`, without support
+	     * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+	     *
+	     * @private
+	     * @param {Array|Object} collection The collection to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @param {*} accumulator The initial value.
+	     * @param {boolean} initAccum Specify using the first or last element of
+	     *  `collection` as the initial value.
+	     * @param {Function} eachFunc The function to iterate over `collection`.
+	     * @returns {*} Returns the accumulated value.
+	     */
 
-	      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
+	    function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+	      eachFunc(collection, function (value, index, collection) {
+	        accumulator = initAccum ? (initAccum = false, value) : iteratee(accumulator, value, index, collection);
 	      });
+	      return accumulator;
 	    }
+	    /**
+	     * The base implementation of `_.sortBy` which uses `comparer` to define the
+	     * sort order of `array` and replaces criteria objects with their corresponding
+	     * values.
+	     *
+	     * @private
+	     * @param {Array} array The array to sort.
+	     * @param {Function} comparer The function to define sort order.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	    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
-	        });
+
+	    function baseSortBy(array, comparer) {
+	      var length = array.length;
+	      array.sort(comparer);
+
+	      while (length--) {
+	        array[length] = array[length].value;
 	      }
+
+	      return array;
 	    }
-	  },
-	  // Same as memberByRole, but returns all members with the given role
-	  membersByRole: function membersByRole(role) {
-	    var result = [];
+	    /**
+	     * The base implementation of `_.sum` and `_.sumBy` without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} array The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {number} Returns the sum.
+	     */
 
-	    for (var i = 0; i < this.members.length; i++) {
-	      if (this.members[i].role === role) {
-	        result.push(Object.assign({}, this.members[i], {
-	          index: i
-	        }));
+
+	    function baseSum(array, iteratee) {
+	      var result,
+	          index = -1,
+	          length = array.length;
+
+	      while (++index < length) {
+	        var current = iteratee(array[index]);
+
+	        if (current !== undefined$1) {
+	          result = result === undefined$1 ? current : result + current;
+	        }
 	      }
+
+	      return result;
 	    }
+	    /**
+	     * The base implementation of `_.times` without support for iteratee shorthands
+	     * or max array length checks.
+	     *
+	     * @private
+	     * @param {number} n The number of times to invoke `iteratee`.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns the array of results.
+	     */
 
-	    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
-	        });
+
+	    function baseTimes(n, iteratee) {
+	      var index = -1,
+	          result = Array(n);
+
+	      while (++index < n) {
+	        result[index] = iteratee(index);
 	      }
+
+	      return result;
 	    }
-	  },
-	  // 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
-	        });
-	      }
+	    /**
+	     * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
+	     * of key-value pairs for `object` corresponding to the property names of `props`.
+	     *
+	     * @private
+	     * @param {Object} object The object to query.
+	     * @param {Array} props The property names to get values for.
+	     * @returns {Object} Returns the key-value pairs.
+	     */
+
+
+	    function baseToPairs(object, props) {
+	      return arrayMap(props, function (key) {
+	        return [key, object[key]];
+	      });
 	    }
-	  },
-	  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 = [];
+	    /**
+	     * The base implementation of `_.trim`.
+	     *
+	     * @private
+	     * @param {string} string The string to trim.
+	     * @returns {string} Returns the trimmed string.
+	     */
 
-	    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
-	        });
-	      }
+	    function baseTrim(string) {
+	      return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
 	    }
+	    /**
+	     * The base implementation of `_.unary` without support for storing metadata.
+	     *
+	     * @private
+	     * @param {Function} func The function to cap arguments for.
+	     * @returns {Function} Returns the new capped function.
+	     */
 
-	    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)
-	            }
-	          };
-	        }, 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;
+	    function baseUnary(func) {
+	      return function (value) {
+	        return func(value);
+	      };
 	    }
+	    /**
+	     * The base implementation of `_.values` and `_.valuesIn` which creates an
+	     * array of `object` property values corresponding to the property names
+	     * of `props`.
+	     *
+	     * @private
+	     * @param {Object} object The object to query.
+	     * @param {Array} props The property names to get values for.
+	     * @returns {Object} Returns the array of property values.
+	     */
 
-	    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;
-	      }
+
+	    function baseValues(object, props) {
+	      return arrayMap(props, function (key) {
+	        return object[key];
+	      });
 	    }
+	    /**
+	     * Checks if a `cache` value for `key` exists.
+	     *
+	     * @private
+	     * @param {Object} cache The cache to query.
+	     * @param {string} key The key of the entry to check.
+	     * @returns {boolean} Returns `true` if an entry for `key` exists, else `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;
-	  },
-	  // 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 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]);
-	      }
+	    function cacheHas(cache, key) {
+	      return cache.has(key);
+	    }
+	    /**
+	     * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
+	     * that is not found in the character symbols.
+	     *
+	     * @private
+	     * @param {Array} strSymbols The string symbols to inspect.
+	     * @param {Array} chrSymbols The character symbols to find.
+	     * @returns {number} Returns the index of the first unmatched string symbol.
+	     */
 
-	      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 charsStartIndex(strSymbols, chrSymbols) {
+	      var index = -1,
+	          length = strSymbols.length;
+
+	      while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
+
+	      return index;
+	    }
+	    /**
+	     * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
+	     * that is not found in the character symbols.
+	     *
+	     * @private
+	     * @param {Array} strSymbols The string symbols to inspect.
+	     * @param {Array} chrSymbols The character symbols to find.
+	     * @returns {number} Returns the index of the last unmatched string symbol.
+	     */
+
+
+	    function charsEndIndex(strSymbols, chrSymbols) {
+	      var index = strSymbols.length;
+
+	      while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
+
+	      return index;
+	    }
+	    /**
+	     * Gets the number of `placeholder` occurrences in `array`.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} placeholder The placeholder to search for.
+	     * @returns {number} Returns the placeholder count.
+	     */
+
 
-	    function findOuter(inner) {
-	      var o, outer;
+	    function countHolders(array, placeholder) {
+	      var length = array.length,
+	          result = 0;
 
-	      for (o = 0; o < outers.length; o++) {
-	        outer = outers[o];
-	        if (geoPolygonContainsPolygon(outer, inner)) return o;
+	      while (length--) {
+	        if (array[length] === placeholder) {
+	          ++result;
+	        }
 	      }
 
-	      for (o = 0; o < outers.length; o++) {
-	        outer = outers[o];
-	        if (geoPolygonIntersectsPolygon(outer, inner, false)) return o;
-	      }
+	      return result;
 	    }
+	    /**
+	     * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+	     * letters to basic Latin letters.
+	     *
+	     * @private
+	     * @param {string} letter The matched letter to deburr.
+	     * @returns {string} Returns the deburred letter.
+	     */
 
-	    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 deburrLetter = basePropertyOf(deburredLetters);
+	    /**
+	     * Used by `_.escape` to convert characters to HTML entities.
+	     *
+	     * @private
+	     * @param {string} chr The matched character to escape.
+	     * @returns {string} Returns the escaped character.
+	     */
 
-	      var o = findOuter(inners[i]);
+	    var escapeHtmlChar = basePropertyOf(htmlEscapes);
+	    /**
+	     * Used by `_.template` to escape characters for inclusion in compiled string literals.
+	     *
+	     * @private
+	     * @param {string} chr The matched character to escape.
+	     * @returns {string} Returns the escaped character.
+	     */
 
-	      if (o !== undefined) {
-	        result[o].push(inners[i]);
-	      } else {
-	        result.push([inners[i]]); // Invalid geometry
-	      }
+	    function escapeStringChar(chr) {
+	      return '\\' + stringEscapes[chr];
 	    }
+	    /**
+	     * Gets the value at `key` of `object`.
+	     *
+	     * @private
+	     * @param {Object} [object] The object to query.
+	     * @param {string} key The key of the property to get.
+	     * @returns {*} Returns the property value.
+	     */
 
-	    return result;
-	  }
-	});
 
-	var QAItem = /*#__PURE__*/function () {
-	  function QAItem(loc, service, itemType, id, props) {
-	    _classCallCheck(this, QAItem);
+	    function getValue(object, key) {
+	      return object == null ? undefined$1 : object[key];
+	    }
+	    /**
+	     * Checks if `string` contains Unicode symbols.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {boolean} Returns `true` if a symbol is found, else `false`.
+	     */
 
-	    // 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 : "".concat(QAItem.id());
-	    this.update(props); // Some QA services have marker icons to differentiate issues
+	    function hasUnicode(string) {
+	      return reHasUnicode.test(string);
+	    }
+	    /**
+	     * Checks if `string` contains a word composed of Unicode symbols.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {boolean} Returns `true` if a word is found, else `false`.
+	     */
 
-	    if (service && typeof service.getIcon === 'function') {
-	      this.icon = service.getIcon(itemType);
+
+	    function hasUnicodeWord(string) {
+	      return reHasUnicodeWord.test(string);
 	    }
-	  }
+	    /**
+	     * Converts `iterator` to an array.
+	     *
+	     * @private
+	     * @param {Object} iterator The iterator to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	  _createClass(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
+	    function iteratorToArray(iterator) {
+	      var data,
+	          result = [];
 
-	  }], [{
-	    key: "id",
-	    value: function id() {
-	      return this.nextId--;
-	    }
-	  }]);
+	      while (!(data = iterator.next()).done) {
+	        result.push(data.value);
+	      }
 
-	  return QAItem;
-	}();
-	QAItem.nextId = -1;
+	      return result;
+	    }
+	    /**
+	     * Converts `map` to its key-value pairs.
+	     *
+	     * @private
+	     * @param {Object} map The map to convert.
+	     * @returns {Array} Returns the key-value pairs.
+	     */
 
-	//
-	// 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];
+	    function mapToArray(map) {
+	      var index = -1,
+	          result = Array(map.size);
+	      map.forEach(function (value, key) {
+	        result[++index] = [key, value];
+	      });
+	      return result;
+	    }
+	    /**
+	     * Creates a unary function that invokes `func` with its argument transformed.
+	     *
+	     * @private
+	     * @param {Function} func The function to wrap.
+	     * @param {Function} transform The argument transform.
+	     * @returns {Function} Returns the new function.
+	     */
 
-	  var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
 
+	    function overArg(func, transform) {
+	      return function (arg) {
+	        return func(transform(arg));
+	      };
+	    }
+	    /**
+	     * Replaces all `placeholder` elements in `array` with an internal placeholder
+	     * and returns an array of their indexes.
+	     *
+	     * @private
+	     * @param {Array} array The array to modify.
+	     * @param {*} placeholder The placeholder to replace.
+	     * @returns {Array} Returns the new array of placeholder indexes.
+	     */
 
-	  var _keepHistoryOn = 'longest'; // 'longest', 'first'
-	  // The IDs of the ways actually created by running this action
 
-	  var _createdWayIDs = [];
+	    function replaceHolders(array, placeholder) {
+	      var index = -1,
+	          length = array.length,
+	          resIndex = 0,
+	          result = [];
 
-	  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.
+	      while (++index < length) {
+	        var value = array[index];
 
+	        if (value === placeholder || value === PLACEHOLDER) {
+	          array[index] = PLACEHOLDER;
+	          result[resIndex++] = index;
+	        }
+	      }
 
-	  function splitArea(nodes, idxA, graph) {
-	    var lengths = new Array(nodes.length);
-	    var length;
-	    var i;
-	    var best = 0;
-	    var idxB;
+	      return result;
+	    }
+	    /**
+	     * Converts `set` to an array of its values.
+	     *
+	     * @private
+	     * @param {Object} set The set to convert.
+	     * @returns {Array} Returns the values.
+	     */
 
-	    function wrap(index) {
-	      return utilWrap(index, nodes.length);
-	    } // calculate lengths
 
+	    function setToArray(set) {
+	      var index = -1,
+	          result = Array(set.size);
+	      set.forEach(function (value) {
+	        result[++index] = value;
+	      });
+	      return result;
+	    }
+	    /**
+	     * Converts `set` to its value-value pairs.
+	     *
+	     * @private
+	     * @param {Object} set The set to convert.
+	     * @returns {Array} Returns the value-value pairs.
+	     */
 
-	    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;
+	    function setToPairs(set) {
+	      var index = -1,
+	          result = Array(set.size);
+	      set.forEach(function (value) {
+	        result[++index] = [value, value];
+	      });
+	      return result;
 	    }
+	    /**
+	     * A specialized version of `_.indexOf` which performs strict equality
+	     * comparisons of values, i.e. `===`.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
-	    length = 0;
 
-	    for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-	      length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
+	    function strictIndexOf(array, value, fromIndex) {
+	      var index = fromIndex - 1,
+	          length = array.length;
 
-	      if (length < lengths[i]) {
-	        lengths[i] = length;
+	      while (++index < length) {
+	        if (array[index] === value) {
+	          return index;
+	        }
 	      }
-	    } // determine best opposite node to split
+
+	      return -1;
+	    }
+	    /**
+	     * A specialized version of `_.lastIndexOf` which performs strict equality
+	     * comparisons of values, i.e. `===`.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
 
-	    for (i = 0; i < nodes.length; i++) {
-	      var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
+	    function strictLastIndexOf(array, value, fromIndex) {
+	      var index = fromIndex + 1;
 
-	      if (cost > best) {
-	        idxB = i;
-	        best = cost;
+	      while (index--) {
+	        if (array[index] === value) {
+	          return index;
+	        }
 	      }
+
+	      return index;
 	    }
+	    /**
+	     * Gets the number of symbols in `string`.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {number} Returns the string size.
+	     */
 
-	    return idxB;
-	  }
 
-	  function totalLengthBetweenNodes(graph, nodes) {
-	    var totalLength = 0;
+	    function stringSize(string) {
+	      return hasUnicode(string) ? unicodeSize(string) : asciiSize(string);
+	    }
+	    /**
+	     * Converts `string` to an array.
+	     *
+	     * @private
+	     * @param {string} string The string to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	    for (var i = 0; i < nodes.length - 1; i++) {
-	      totalLength += dist(graph, nodes[i], nodes[i + 1]);
+
+	    function stringToArray(string) {
+	      return hasUnicode(string) ? unicodeToArray(string) : asciiToArray(string);
 	    }
+	    /**
+	     * 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.
+	     */
 
-	    return totalLength;
-	  }
 
-	  function split(graph, nodeId, wayA, newWayId) {
-	    var wayB = osmWay({
-	      id: newWayId,
-	      tags: wayA.tags
-	    }); // `wayB` is the NEW way
+	    function trimmedEndIndex(string) {
+	      var index = string.length;
 
-	    var origNodes = wayA.nodes.slice();
-	    var nodesA;
-	    var nodesB;
-	    var isArea = wayA.isArea();
-	    var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
+	      while (index-- && reWhitespace.test(string.charAt(index))) {}
 
-	    if (wayA.isClosed()) {
-	      var nodes = wayA.nodes.slice(0, -1);
-	      var idxA = nodes.indexOf(nodeId);
-	      var idxB = splitArea(nodes, idxA, graph);
+	      return index;
+	    }
+	    /**
+	     * Used by `_.unescape` to convert HTML entities to characters.
+	     *
+	     * @private
+	     * @param {string} chr The matched character to unescape.
+	     * @returns {string} Returns the unescaped character.
+	     */
 
-	      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));
+
+	    var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+	    /**
+	     * Gets the size of a Unicode `string`.
+	     *
+	     * @private
+	     * @param {string} string The string inspect.
+	     * @returns {number} Returns the string size.
+	     */
+
+	    function unicodeSize(string) {
+	      var result = reUnicode.lastIndex = 0;
+
+	      while (reUnicode.test(string)) {
+	        ++result;
 	      }
-	    } else {
-	      var idx = wayA.nodes.indexOf(nodeId, 1);
-	      nodesA = wayA.nodes.slice(0, idx + 1);
-	      nodesB = wayA.nodes.slice(idx);
+
+	      return result;
 	    }
+	    /**
+	     * Converts a Unicode `string` to an array.
+	     *
+	     * @private
+	     * @param {string} string The string to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	    var lengthA = totalLengthBetweenNodes(graph, nodesA);
-	    var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-	    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
-	      });
+	    function unicodeToArray(string) {
+	      return string.match(reUnicode) || [];
 	    }
+	    /**
+	     * Splits a Unicode `string` into an array of its words.
+	     *
+	     * @private
+	     * @param {string} The string to inspect.
+	     * @returns {Array} Returns the words of `string`.
+	     */
 
-	    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
-	        });
-	      }
+	    function unicodeWords(string) {
+	      return string.match(reUnicodeWord) || [];
 	    }
+	    /*--------------------------------------------------------------------------*/
 
-	    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
+	    /**
+	     * Create a new pristine `lodash` function using the `context` object.
+	     *
+	     * @static
+	     * @memberOf _
+	     * @since 1.1.0
+	     * @category Util
+	     * @param {Object} [context=root] The context object.
+	     * @returns {Function} Returns a new `lodash` function.
+	     * @example
+	     *
+	     * _.mixin({ 'foo': _.constant('foo') });
+	     *
+	     * var lodash = _.runInContext();
+	     * lodash.mixin({ 'bar': lodash.constant('bar') });
+	     *
+	     * _.isFunction(_.foo);
+	     * // => true
+	     * _.isFunction(_.bar);
+	     * // => false
+	     *
+	     * lodash.isFunction(lodash.foo);
+	     * // => false
+	     * lodash.isFunction(lodash.bar);
+	     * // => true
+	     *
+	     * // Create a suped-up `defer` in Node.js.
+	     * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
+	     */
 
-	      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;
+	    var runInContext = function runInContext(context) {
+	      context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
+	      /** Built-in constructor references. */
 
-	          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);
+	      var Array = context.Array,
+	          Date = context.Date,
+	          Error = context.Error,
+	          Function = context.Function,
+	          Math = context.Math,
+	          Object = context.Object,
+	          RegExp = context.RegExp,
+	          String = context.String,
+	          TypeError = context.TypeError;
+	      /** Used for built-in method references. */
 
-	                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-	                  keepB = true;
-	                  break;
-	                }
-	              }
-	            }
-	          }
+	      var arrayProto = Array.prototype,
+	          funcProto = Function.prototype,
+	          objectProto = Object.prototype;
+	      /** Used to detect overreaching core-js shims. */
 
-	          if (keepB) {
-	            relation = relation.replaceMember(wayA, wayB);
-	            graph = graph.replace(relation);
-	          } // 2. split a VIA
+	      var coreJsData = context['__core-js_shared__'];
+	      /** Used to resolve the decompiled source of functions. */
 
-	        } 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;
-	            }
+	      var funcToString = funcProto.toString;
+	      /** Used to check objects for own properties. */
+
+	      var hasOwnProperty = objectProto.hasOwnProperty;
+	      /** Used to generate unique IDs. */
+
+	      var idCounter = 0;
+	      /** Used to detect methods masquerading as native. */
+
+	      var maskSrcKey = function () {
+	        var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+	        return uid ? 'Symbol(src)_1.' + uid : '';
+	      }();
+	      /**
+	       * Used to resolve the
+	       * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	       * of values.
+	       */
+
+
+	      var nativeObjectToString = objectProto.toString;
+	      /** Used to infer the `Object` constructor. */
+
+	      var objectCtorString = funcToString.call(Object);
+	      /** Used to restore the original `_` reference in `_.noConflict`. */
+
+	      var oldDash = root._;
+	      /** Used to detect if a method is native. */
+
+	      var reIsNative = RegExp('^' + funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&').replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$');
+	      /** Built-in value references. */
+
+	      var Buffer = moduleExports ? context.Buffer : undefined$1,
+	          _Symbol = context.Symbol,
+	          Uint8Array = context.Uint8Array,
+	          allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined$1,
+	          getPrototype = overArg(Object.getPrototypeOf, Object),
+	          objectCreate = Object.create,
+	          propertyIsEnumerable = objectProto.propertyIsEnumerable,
+	          splice = arrayProto.splice,
+	          spreadableSymbol = _Symbol ? _Symbol.isConcatSpreadable : undefined$1,
+	          symIterator = _Symbol ? _Symbol.iterator : undefined$1,
+	          symToStringTag = _Symbol ? _Symbol.toStringTag : undefined$1;
+
+	      var defineProperty = function () {
+	        try {
+	          var func = getNative(Object, 'defineProperty');
+	          func({}, '', {});
+	          return func;
+	        } catch (e) {}
+	      }();
+	      /** Mocked built-ins. */
+
+
+	      var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
+	          ctxNow = Date && Date.now !== root.Date.now && Date.now,
+	          ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
+	      /* Built-in method references for those with the same name as other `lodash` methods. */
+
+	      var nativeCeil = Math.ceil,
+	          nativeFloor = Math.floor,
+	          nativeGetSymbols = Object.getOwnPropertySymbols,
+	          nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined$1,
+	          nativeIsFinite = context.isFinite,
+	          nativeJoin = arrayProto.join,
+	          nativeKeys = overArg(Object.keys, Object),
+	          nativeMax = Math.max,
+	          nativeMin = Math.min,
+	          nativeNow = Date.now,
+	          nativeParseInt = context.parseInt,
+	          nativeRandom = Math.random,
+	          nativeReverse = arrayProto.reverse;
+	      /* Built-in method references that are verified to be native. */
+
+	      var DataView = getNative(context, 'DataView'),
+	          Map = getNative(context, 'Map'),
+	          Promise = getNative(context, 'Promise'),
+	          Set = getNative(context, 'Set'),
+	          WeakMap = getNative(context, 'WeakMap'),
+	          nativeCreate = getNative(Object, 'create');
+	      /** Used to store function metadata. */
+
+	      var metaMap = WeakMap && new WeakMap();
+	      /** Used to lookup unminified function names. */
+
+	      var realNames = {};
+	      /** Used to detect maps, sets, and weakmaps. */
+
+	      var dataViewCtorString = toSource(DataView),
+	          mapCtorString = toSource(Map),
+	          promiseCtorString = toSource(Promise),
+	          setCtorString = toSource(Set),
+	          weakMapCtorString = toSource(WeakMap);
+	      /** Used to convert symbols to primitives and strings. */
+
+	      var symbolProto = _Symbol ? _Symbol.prototype : undefined$1,
+	          symbolValueOf = symbolProto ? symbolProto.valueOf : undefined$1,
+	          symbolToString = symbolProto ? symbolProto.toString : undefined$1;
+	      /*------------------------------------------------------------------------*/
+
+	      /**
+	       * Creates a `lodash` object which wraps `value` to enable implicit method
+	       * chain sequences. Methods that operate on and return arrays, collections,
+	       * and functions can be chained together. Methods that retrieve a single value
+	       * or may return a primitive value will automatically end the chain sequence
+	       * and return the unwrapped value. Otherwise, the value must be unwrapped
+	       * with `_#value`.
+	       *
+	       * Explicit chain sequences, which must be unwrapped with `_#value`, may be
+	       * enabled using `_.chain`.
+	       *
+	       * The execution of chained methods is lazy, that is, it's deferred until
+	       * `_#value` is implicitly or explicitly called.
+	       *
+	       * Lazy evaluation allows several methods to support shortcut fusion.
+	       * Shortcut fusion is an optimization to merge iteratee calls; this avoids
+	       * the creation of intermediate arrays and can greatly reduce the number of
+	       * iteratee executions. Sections of a chain sequence qualify for shortcut
+	       * fusion if the section is applied to an array and iteratees accept only
+	       * one argument. The heuristic for whether a section qualifies for shortcut
+	       * fusion is subject to change.
+	       *
+	       * Chaining is supported in custom builds as long as the `_#value` method is
+	       * directly or indirectly included in the build.
+	       *
+	       * In addition to lodash methods, wrappers have `Array` and `String` methods.
+	       *
+	       * The wrapper `Array` methods are:
+	       * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
+	       *
+	       * The wrapper `String` methods are:
+	       * `replace` and `split`
+	       *
+	       * The wrapper methods that support shortcut fusion are:
+	       * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+	       * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+	       * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+	       *
+	       * The chainable wrapper methods are:
+	       * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
+	       * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
+	       * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
+	       * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
+	       * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
+	       * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
+	       * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
+	       * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
+	       * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
+	       * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
+	       * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
+	       * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
+	       * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
+	       * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
+	       * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
+	       * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
+	       * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
+	       * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
+	       * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
+	       * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
+	       * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
+	       * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
+	       * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
+	       * `zipObject`, `zipObjectDeep`, and `zipWith`
+	       *
+	       * The wrapper methods that are **not** chainable by default are:
+	       * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
+	       * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
+	       * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
+	       * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
+	       * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
+	       * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
+	       * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
+	       * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
+	       * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
+	       * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
+	       * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+	       * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+	       * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+	       * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+	       * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+	       * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+	       * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+	       * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+	       * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+	       * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+	       * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+	       * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+	       * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+	       * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+	       * `upperFirst`, `value`, and `words`
+	       *
+	       * @name _
+	       * @constructor
+	       * @category Seq
+	       * @param {*} value The value to wrap in a `lodash` instance.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var wrapped = _([1, 2, 3]);
+	       *
+	       * // Returns an unwrapped value.
+	       * wrapped.reduce(_.add);
+	       * // => 6
+	       *
+	       * // Returns a wrapped value.
+	       * var squares = wrapped.map(square);
+	       *
+	       * _.isArray(squares);
+	       * // => false
+	       *
+	       * _.isArray(squares.value());
+	       * // => true
+	       */
+
+	      function lodash(value) {
+	        if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
+	          if (value instanceof LodashWrapper) {
+	            return value;
 	          }
-	        } // 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: {}
-	          }));
+	          if (hasOwnProperty.call(value, '__wrapped__')) {
+	            return wrapperClone(value);
+	          }
 	        }
 
-	        member = {
-	          id: wayB.id,
-	          type: 'way',
-	          role: relation.memberById(wayA.id).role
-	        };
-	        var insertPair = {
-	          originalID: wayA.id,
-	          insertedID: wayB.id,
-	          nodes: origNodes
+	        return new LodashWrapper(value);
+	      }
+	      /**
+	       * The base implementation of `_.create` without support for assigning
+	       * properties to the created object.
+	       *
+	       * @private
+	       * @param {Object} proto The object to inherit from.
+	       * @returns {Object} Returns the new object.
+	       */
+
+
+	      var baseCreate = function () {
+	        function object() {}
+
+	        return function (proto) {
+	          if (!isObject(proto)) {
+	            return {};
+	          }
+
+	          if (objectCreate) {
+	            return objectCreate(proto);
+	          }
+
+	          object.prototype = proto;
+	          var result = new object();
+	          object.prototype = undefined$1;
+	          return result;
 	        };
-	        graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
+	      }();
+	      /**
+	       * The function whose prototype chain sequence wrappers inherit from.
+	       *
+	       * @private
+	       */
+
+
+	      function baseLodash() {// No operation performed.
 	      }
-	    });
+	      /**
+	       * The base constructor for creating `lodash` wrapper objects.
+	       *
+	       * @private
+	       * @param {*} value The value to wrap.
+	       * @param {boolean} [chainAll] Enable explicit method chain sequences.
+	       */
 
-	    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);
+	      function LodashWrapper(value, chainAll) {
+	        this.__wrapped__ = value;
+	        this.__actions__ = [];
+	        this.__chain__ = !!chainAll;
+	        this.__index__ = 0;
+	        this.__values__ = undefined$1;
+	      }
+	      /**
+	       * By default, the template delimiters used by lodash are like those in
+	       * embedded Ruby (ERB) as well as ES2015 template strings. Change the
+	       * following template settings to use alternative delimiters.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @type {Object}
+	       */
+
+
+	      lodash.templateSettings = {
+	        /**
+	         * Used to detect `data` property values to be HTML-escaped.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {RegExp}
+	         */
+	        'escape': reEscape,
+
+	        /**
+	         * Used to detect code to be evaluated.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {RegExp}
+	         */
+	        'evaluate': reEvaluate,
+
+	        /**
+	         * Used to detect `data` property values to inject.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {RegExp}
+	         */
+	        'interpolate': reInterpolate,
+
+	        /**
+	         * Used to reference the data object in the template text.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {string}
+	         */
+	        'variable': '',
+
+	        /**
+	         * Used to import variables into the compiled template.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {Object}
+	         */
+	        'imports': {
+	          /**
+	           * A reference to the `lodash` function.
+	           *
+	           * @memberOf _.templateSettings.imports
+	           * @type {Function}
+	           */
+	          '_': lodash
+	        }
+	      }; // Ensure wrappers are instances of `baseLodash`.
+
+	      lodash.prototype = baseLodash.prototype;
+	      lodash.prototype.constructor = lodash;
+	      LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+	      LodashWrapper.prototype.constructor = LodashWrapper;
+	      /*------------------------------------------------------------------------*/
+
+	      /**
+	       * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {*} value The value to wrap.
+	       */
+
+	      function LazyWrapper(value) {
+	        this.__wrapped__ = value;
+	        this.__actions__ = [];
+	        this.__dir__ = 1;
+	        this.__filtered__ = false;
+	        this.__iteratees__ = [];
+	        this.__takeCount__ = MAX_ARRAY_LENGTH;
+	        this.__views__ = [];
+	      }
+	      /**
+	       * Creates a clone of the lazy wrapper object.
+	       *
+	       * @private
+	       * @name clone
+	       * @memberOf LazyWrapper
+	       * @returns {Object} Returns the cloned `LazyWrapper` object.
+	       */
+
+
+	      function lazyClone() {
+	        var result = new LazyWrapper(this.__wrapped__);
+	        result.__actions__ = copyArray(this.__actions__);
+	        result.__dir__ = this.__dir__;
+	        result.__filtered__ = this.__filtered__;
+	        result.__iteratees__ = copyArray(this.__iteratees__);
+	        result.__takeCount__ = this.__takeCount__;
+	        result.__views__ = copyArray(this.__views__);
+	        return result;
+	      }
+	      /**
+	       * Reverses the direction of lazy iteration.
+	       *
+	       * @private
+	       * @name reverse
+	       * @memberOf LazyWrapper
+	       * @returns {Object} Returns the new reversed `LazyWrapper` object.
+	       */
+
+
+	      function lazyReverse() {
+	        if (this.__filtered__) {
+	          var result = new LazyWrapper(this);
+	          result.__dir__ = -1;
+	          result.__filtered__ = true;
+	        } else {
+	          result = this.clone();
+	          result.__dir__ *= -1;
+	        }
+
+	        return result;
+	      }
+	      /**
+	       * Extracts the unwrapped value from its lazy wrapper.
+	       *
+	       * @private
+	       * @name value
+	       * @memberOf LazyWrapper
+	       * @returns {*} Returns the unwrapped value.
+	       */
+
+
+	      function lazyValue() {
+	        var array = this.__wrapped__.value(),
+	            dir = this.__dir__,
+	            isArr = isArray(array),
+	            isRight = dir < 0,
+	            arrLength = isArr ? array.length : 0,
+	            view = getView(0, arrLength, this.__views__),
+	            start = view.start,
+	            end = view.end,
+	            length = end - start,
+	            index = isRight ? end : start - 1,
+	            iteratees = this.__iteratees__,
+	            iterLength = iteratees.length,
+	            resIndex = 0,
+	            takeCount = nativeMin(length, this.__takeCount__);
+
+	        if (!isArr || !isRight && arrLength == length && takeCount == length) {
+	          return baseWrapperValue(array, this.__actions__);
+	        }
+
+	        var result = [];
+
+	        outer: while (length-- && resIndex < takeCount) {
+	          index += dir;
+	          var iterIndex = -1,
+	              value = array[index];
+
+	          while (++iterIndex < iterLength) {
+	            var data = iteratees[iterIndex],
+	                iteratee = data.iteratee,
+	                type = data.type,
+	                computed = iteratee(value);
+
+	            if (type == LAZY_MAP_FLAG) {
+	              value = computed;
+	            } else if (!computed) {
+	              if (type == LAZY_FILTER_FLAG) {
+	                continue outer;
+	              } else {
+	                break outer;
+	              }
+	            }
+	          }
+
+	          result[resIndex++] = value;
+	        }
 
-	    return graph;
-	  }
+	        return result;
+	      } // Ensure `LazyWrapper` is an instance of `baseLodash`.
 
-	  var action = function action(graph) {
-	    _createdWayIDs = [];
-	    var newWayIndex = 0;
 
-	    for (var i = 0; i < nodeIds.length; i++) {
-	      var nodeId = nodeIds[i];
-	      var candidates = action.waysForNode(nodeId, graph);
+	      LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+	      LazyWrapper.prototype.constructor = LazyWrapper;
+	      /*------------------------------------------------------------------------*/
 
-	      for (var j = 0; j < candidates.length; j++) {
-	        graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
-	        newWayIndex += 1;
-	      }
-	    }
+	      /**
+	       * Creates a hash object.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	    return graph;
-	  };
+	      function Hash(entries) {
+	        var index = -1,
+	            length = entries == null ? 0 : entries.length;
+	        this.clear();
 
-	  action.getCreatedWayIDs = function () {
-	    return _createdWayIDs;
-	  };
+	        while (++index < length) {
+	          var entry = entries[index];
+	          this.set(entry[0], entry[1]);
+	        }
+	      }
+	      /**
+	       * Removes all key-value entries from the hash.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf Hash
+	       */
 
-	  action.waysForNode = function (nodeId, graph) {
-	    var node = graph.entity(nodeId);
-	    var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-	    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';
-	      });
+	      function hashClear() {
+	        this.__data__ = nativeCreate ? nativeCreate(null) : {};
+	        this.size = 0;
+	      }
+	      /**
+	       * Removes `key` and its value from the hash.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf Hash
+	       * @param {Object} hash The hash to modify.
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
-	      if (hasLine) {
-	        return splittableParents.filter(function (parent) {
-	          return parent.geometry(graph) === 'line';
-	        });
+
+	      function hashDelete(key) {
+	        var result = this.has(key) && delete this.__data__[key];
+	        this.size -= result ? 1 : 0;
+	        return result;
 	      }
-	    }
+	      /**
+	       * Gets the hash value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf Hash
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
-	    return splittableParents;
 
-	    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...
+	      function hashGet(key) {
+	        var data = this.__data__;
 
-	      if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
+	        if (nativeCreate) {
+	          var result = data[key];
+	          return result === HASH_UNDEFINED ? undefined$1 : result;
+	        }
 
-	      for (var i = 1; i < parent.nodes.length - 1; i++) {
-	        if (parent.nodes[i] === nodeId) return true;
+	        return hasOwnProperty.call(data, key) ? data[key] : undefined$1;
 	      }
+	      /**
+	       * Checks if a hash value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf Hash
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	      return false;
-	    }
-	  };
 
-	  action.ways = function (graph) {
-	    return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
-	      return action.waysForNode(nodeId, graph);
-	    })));
-	  };
+	      function hashHas(key) {
+	        var data = this.__data__;
+	        return nativeCreate ? data[key] !== undefined$1 : hasOwnProperty.call(data, key);
+	      }
+	      /**
+	       * Sets the hash `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf Hash
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the hash instance.
+	       */
 
-	  action.disabled = function (graph) {
-	    for (var i = 0; i < nodeIds.length; i++) {
-	      var nodeId = nodeIds[i];
-	      var candidates = action.waysForNode(nodeId, graph);
 
-	      if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
-	        return 'not_eligible';
-	      }
-	    }
-	  };
+	      function hashSet(key, value) {
+	        var data = this.__data__;
+	        this.size += this.has(key) ? 0 : 1;
+	        data[key] = nativeCreate && value === undefined$1 ? HASH_UNDEFINED : value;
+	        return this;
+	      } // Add methods to `Hash`.
 
-	  action.limitWays = function (val) {
-	    if (!arguments.length) return _wayIDs;
-	    _wayIDs = val;
-	    return action;
-	  };
 
-	  action.keepHistoryOn = function (val) {
-	    if (!arguments.length) return _keepHistoryOn;
-	    _keepHistoryOn = val;
-	    return action;
-	  };
+	      Hash.prototype.clear = hashClear;
+	      Hash.prototype['delete'] = hashDelete;
+	      Hash.prototype.get = hashGet;
+	      Hash.prototype.has = hashHas;
+	      Hash.prototype.set = hashSet;
+	      /*------------------------------------------------------------------------*/
 
-	  return action;
-	}
+	      /**
+	       * Creates an list cache object.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	function coreGraph(other, mutable) {
-	  if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
+	      function ListCache(entries) {
+	        var index = -1,
+	            length = entries == null ? 0 : entries.length;
+	        this.clear();
 
-	  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]);
-	  }
+	        while (++index < length) {
+	          var entry = entries[index];
+	          this.set(entry[0], entry[1]);
+	        }
+	      }
+	      /**
+	       * Removes all key-value entries from the list cache.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf ListCache
+	       */
 
-	  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 (!entity) {
-	      entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
-	    }
+	      function listCacheClear() {
+	        this.__data__ = [];
+	        this.size = 0;
+	      }
+	      /**
+	       * Removes `key` and its value from the list cache.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf ListCache
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
-	    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] = {});
+	      function listCacheDelete(key) {
+	        var data = this.__data__,
+	            index = assocIndexOf(data, key);
 
-	    if (transients[key] !== undefined) {
-	      return transients[key];
-	    }
+	        if (index < 0) {
+	          return false;
+	        }
 
-	    transients[key] = fn.call(entity);
-	    return transients[key];
-	  },
-	  parentWays: function parentWays(entity) {
-	    var parents = this._parentWays[entity.id];
-	    var result = [];
+	        var lastIndex = data.length - 1;
 
-	    if (parents) {
-	      parents.forEach(function (id) {
-	        result.push(this.entity(id));
-	      }, this);
-	    }
+	        if (index == lastIndex) {
+	          data.pop();
+	        } else {
+	          splice.call(data, index, 1);
+	        }
 
-	    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 = [];
+	        --this.size;
+	        return true;
+	      }
+	      /**
+	       * Gets the list cache value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf ListCache
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
-	    if (parents) {
-	      parents.forEach(function (id) {
-	        result.push(this.entity(id));
-	      }, this);
-	    }
 
-	    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 = [];
+	      function listCacheGet(key) {
+	        var data = this.__data__,
+	            index = assocIndexOf(data, key);
+	        return index < 0 ? undefined$1 : data[index][1];
+	      }
+	      /**
+	       * Checks if a list cache value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf ListCache
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	    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;
 
-	    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
+	      function listCacheHas(key) {
+	        return assocIndexOf(this.__data__, key) > -1;
+	      }
+	      /**
+	       * Sets the list cache `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf ListCache
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the list cache instance.
+	       */
 
-	      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
+	      function listCacheSet(key, value) {
+	        var data = this.__data__,
+	            index = assocIndexOf(data, key);
 
+	        if (index < 0) {
+	          ++this.size;
+	          data.push([key, value]);
+	        } else {
+	          data[index][1] = value;
+	        }
 
-	      if (entity.type === 'way') {
-	        for (j = 0; j < entity.nodes.length; j++) {
-	          id = entity.nodes[j];
+	        return this;
+	      } // Add methods to `ListCache`.
 
-	          for (k = 1; k < stack.length; k++) {
-	            var ents = stack[k].entities;
 
-	            if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-	              delete ents[id];
-	            }
-	          }
+	      ListCache.prototype.clear = listCacheClear;
+	      ListCache.prototype['delete'] = listCacheDelete;
+	      ListCache.prototype.get = listCacheGet;
+	      ListCache.prototype.has = listCacheHas;
+	      ListCache.prototype.set = listCacheSet;
+	      /*------------------------------------------------------------------------*/
+
+	      /**
+	       * Creates a map cache object to store key-value pairs.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
+
+	      function MapCache(entries) {
+	        var index = -1,
+	            length = entries == null ? 0 : entries.length;
+	        this.clear();
+
+	        while (++index < length) {
+	          var entry = entries[index];
+	          this.set(entry[0], entry[1]);
 	        }
 	      }
-	    }
+	      /**
+	       * Removes all key-value entries from the map.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf MapCache
+	       */
 
-	    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;
+	      function mapCacheClear() {
+	        this.size = 0;
+	        this.__data__ = {
+	          'hash': new Hash(),
+	          'map': new (Map || ListCache)(),
+	          'string': new Hash()
+	        };
 	      }
+	      /**
+	       * Removes `key` and its value from the map.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf MapCache
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
-	      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);
+
+	      function mapCacheDelete(key) {
+	        var result = getMapData(this, key)['delete'](key);
+	        this.size -= result ? 1 : 0;
+	        return result;
 	      }
+	      /**
+	       * Gets the map value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf MapCache
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
-	      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);
+
+	      function mapCacheGet(key) {
+	        return getMapData(this, key).get(key);
 	      }
-	    } 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;
-	      }) : [];
+	      /**
+	       * Checks if a map value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf MapCache
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	      if (oldentity && entity) {
-	        removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-	        added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-	      } else if (oldentity) {
-	        removed = oldentityMemberIDs;
-	        added = [];
-	      } else if (entity) {
-	        removed = [];
-	        added = entityMemberIDs;
+
+	      function mapCacheHas(key) {
+	        return getMapData(this, key).has(key);
 	      }
+	      /**
+	       * Sets the map `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf MapCache
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the map cache instance.
+	       */
 
-	      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);
+
+	      function mapCacheSet(key, value) {
+	        var data = getMapData(this, key),
+	            size = data.size;
+	        data.set(key, value);
+	        this.size += data.size == size ? 0 : 1;
+	        return this;
+	      } // Add methods to `MapCache`.
+
+
+	      MapCache.prototype.clear = mapCacheClear;
+	      MapCache.prototype['delete'] = mapCacheDelete;
+	      MapCache.prototype.get = mapCacheGet;
+	      MapCache.prototype.has = mapCacheHas;
+	      MapCache.prototype.set = mapCacheSet;
+	      /*------------------------------------------------------------------------*/
+
+	      /**
+	       *
+	       * Creates an array cache object to store unique values.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [values] The values to cache.
+	       */
+
+	      function SetCache(values) {
+	        var index = -1,
+	            length = values == null ? 0 : values.length;
+	        this.__data__ = new MapCache();
+
+	        while (++index < length) {
+	          this.add(values[index]);
+	        }
 	      }
+	      /**
+	       * Adds `value` to the array cache.
+	       *
+	       * @private
+	       * @name add
+	       * @memberOf SetCache
+	       * @alias push
+	       * @param {*} value The value to cache.
+	       * @returns {Object} Returns the cache instance.
+	       */
 
-	      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);
+
+	      function setCacheAdd(value) {
+	        this.__data__.set(value, HASH_UNDEFINED);
+
+	        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);
+	      /**
+	       * Checks if `value` is in the array cache.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf SetCache
+	       * @param {*} value The value to search for.
+	       * @returns {number} Returns `true` if `value` is found, else `false`.
+	       */
 
-	      this.entities[entity.id] = entity;
-	    });
-	  },
-	  remove: function remove(entity) {
-	    return this.update(function () {
-	      this._updateCalculated(entity, undefined);
 
-	      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);
+	      function setCacheHas(value) {
+	        return this.__data__.has(value);
+	      } // Add methods to `SetCache`.
 
-	      delete this.entities[id];
-	    });
-	  },
-	  update: function update() {
-	    var graph = this.frozen ? coreGraph(this, true) : this;
 
-	    for (var i = 0; i < arguments.length; i++) {
-	      arguments[i].call(graph, graph);
-	    }
+	      SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+	      SetCache.prototype.has = setCacheHas;
+	      /*------------------------------------------------------------------------*/
 
-	    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);
+	      /**
+	       * Creates a stack cache object to store key-value pairs.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	    for (var i in entities) {
-	      this.entities[i] = entities[i];
+	      function Stack(entries) {
+	        var data = this.__data__ = new ListCache(entries);
+	        this.size = data.size;
+	      }
+	      /**
+	       * Removes all key-value entries from the stack.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf Stack
+	       */
 
-	      this._updateCalculated(base.entities[i], this.entities[i]);
-	    }
 
-	    return this;
-	  }
-	};
+	      function stackClear() {
+	        this.__data__ = new ListCache();
+	        this.size = 0;
+	      }
+	      /**
+	       * Removes `key` and its value from the stack.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf Stack
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
-	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
+	      function stackDelete(key) {
+	        var data = this.__data__,
+	            result = data['delete'](key);
+	        this.size = data.size;
+	        return result;
+	      }
+	      /**
+	       * Gets the stack value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf Stack
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
-	  var vgraph = coreGraph(); // virtual graph
 
-	  var i, j, k;
+	      function stackGet(key) {
+	        return this.__data__.get(key);
+	      }
+	      /**
+	       * Checks if a stack value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf Stack
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	  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];
-	  }
+	      function stackHas(key) {
+	        return this.__data__.has(key);
+	      }
+	      /**
+	       * Sets the stack `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf Stack
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the stack cache instance.
+	       */
 
-	  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..
+	      function stackSet(key, value) {
+	        var data = this.__data__;
 
-	  while (checkVertices.length) {
-	    vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+	        if (data instanceof ListCache) {
+	          var pairs = data.__data__;
+
+	          if (!Map || pairs.length < LARGE_ARRAY_SIZE - 1) {
+	            pairs.push([key, value]);
+	            this.size = ++data.size;
+	            return this;
+	          }
+
+	          data = this.__data__ = new MapCache(pairs);
+	        }
+
+	        data.set(key, value);
+	        this.size = data.size;
+	        return this;
+	      } // Add methods to `Stack`.
 
-	    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
+	      Stack.prototype.clear = stackClear;
+	      Stack.prototype['delete'] = stackDelete;
+	      Stack.prototype.get = stackGet;
+	      Stack.prototype.has = stackHas;
+	      Stack.prototype.set = stackSet;
+	      /*------------------------------------------------------------------------*/
 
-	      hasWays = true; // check the way's children for more key vertices
+	      /**
+	       * Creates an array of the enumerable property names of the array-like `value`.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @param {boolean} inherited Specify returning inherited property names.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	      nodes = utilArrayUniq(graph.childNodes(way));
+	      function arrayLikeKeys(value, inherited) {
+	        var isArr = isArray(value),
+	            isArg = !isArr && isArguments(value),
+	            isBuff = !isArr && !isArg && isBuffer(value),
+	            isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+	            skipIndexes = isArr || isArg || isBuff || isType,
+	            result = skipIndexes ? baseTimes(value.length, String) : [],
+	            length = result.length;
+
+	        for (var key in value) {
+	          if ((inherited || hasOwnProperty.call(value, key)) && !(skipIndexes && ( // Safari 9 has enumerable `arguments.length` in strict mode.
+	          key == 'length' || // Node.js 0.10 has enumerable non-index properties on buffers.
+	          isBuff && (key == 'offset' || key == 'parent') || // PhantomJS 2 has enumerable non-index properties on typed arrays.
+	          isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset') || // Skip index properties.
+	          isIndex(key, length)))) {
+	            result.push(key);
+	          }
+	        }
 
-	      for (j = 0; j < nodes.length; j++) {
-	        node = nodes[j];
-	        if (node === vertex) continue; // same thing
+	        return result;
+	      }
+	      /**
+	       * A specialized version of `_.sample` for arrays.
+	       *
+	       * @private
+	       * @param {Array} array The array to sample.
+	       * @returns {*} Returns the random element.
+	       */
 
-	        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
+	      function arraySample(array) {
+	        var length = array.length;
+	        return length ? array[baseRandom(0, length - 1)] : undefined$1;
+	      }
+	      /**
+	       * A specialized version of `_.sampleSize` for arrays.
+	       *
+	       * @private
+	       * @param {Array} array The array to sample.
+	       * @param {number} n The number of elements to sample.
+	       * @returns {Array} Returns the random elements.
+	       */
 
-	        var hasParents = false;
-	        parents = graph.parentWays(node);
 
-	        for (k = 0; k < parents.length; k++) {
-	          parent = parents[k];
-	          if (parent === way) continue; // same thing
+	      function arraySampleSize(array, n) {
+	        return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
+	      }
+	      /**
+	       * A specialized version of `_.shuffle` for arrays.
+	       *
+	       * @private
+	       * @param {Array} array The array to shuffle.
+	       * @returns {Array} Returns the new shuffled array.
+	       */
 
-	          if (ways.indexOf(parent) !== -1) continue; // seen it already
 
-	          if (!isRoad(parent)) continue; // not a road
+	      function arrayShuffle(array) {
+	        return shuffleSelf(copyArray(array));
+	      }
+	      /**
+	       * This function is like `assignValue` except that it doesn't assign
+	       * `undefined` values.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {string} key The key of the property to assign.
+	       * @param {*} value The value to assign.
+	       */
 
-	          hasParents = true;
-	          break;
-	        }
 
-	        if (hasParents) {
-	          checkVertices.push(node);
+	      function assignMergeValue(object, key, value) {
+	        if (value !== undefined$1 && !eq(object[key], value) || value === undefined$1 && !(key in object)) {
+	          baseAssignValue(object, key, value);
 	        }
 	      }
-	    }
+	      /**
+	       * Assigns `value` to `key` of `object` if the existing value is not equivalent
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {string} key The key of the property to assign.
+	       * @param {*} value The value to assign.
+	       */
 
-	    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
+	      function assignValue(object, key, value) {
+	        var objValue = object[key];
 
-	  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));
+	        if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) || value === undefined$1 && !(key in object)) {
+	          baseAssignValue(object, key, value);
 	        }
 	      }
-	    });
-	  }); // STEP 3:  Force all oneways to be drawn in the forward direction
-
-	  ways.forEach(function (w) {
-	    var way = vgraph.entity(w.id);
+	      /**
+	       * Gets the index at which the `key` is found in `array` of key-value pairs.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {*} key The key to search for.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       */
 
-	    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');
+	      function assocIndexOf(array, key) {
+	        var length = array.length;
 
-	    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);
-	      });
-	    }
-	  }); // 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
+	        while (length--) {
+	          if (eq(array[length][0], key)) {
+	            return length;
+	          }
+	        }
 
-	  osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
+	        return -1;
+	      }
+	      /**
+	       * Aggregates elements of `collection` on `accumulator` with keys transformed
+	       * by `iteratee` and values set by `setter`.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} setter The function to set `accumulator` values.
+	       * @param {Function} iteratee The iteratee to transform keys.
+	       * @param {Object} accumulator The initial aggregated object.
+	       * @returns {Function} Returns `accumulator`.
+	       */
 
-	  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?
+	      function baseAggregator(collection, setter, iteratee, accumulator) {
+	        baseEach(collection, function (value, key, collection) {
+	          setter(accumulator, value, iteratee(value), collection);
+	        });
+	        return accumulator;
+	      }
+	      /**
+	       * The base implementation of `_.assign` without support for multiple sources
+	       * or `customizer` functions.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @returns {Object} Returns `object`.
+	       */
 
 
-	    var __first = vertexIds.indexOf(way.first()) !== -1;
+	      function baseAssign(object, source) {
+	        return object && copyObject(source, keys(source), object);
+	      }
+	      /**
+	       * The base implementation of `_.assignIn` without support for multiple sources
+	       * or `customizer` functions.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	    var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
+	      function baseAssignIn(object, source) {
+	        return object && copyObject(source, keysIn(source), object);
+	      }
+	      /**
+	       * The base implementation of `assignValue` and `assignMergeValue` without
+	       * value checks.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {string} key The key of the property to assign.
+	       * @param {*} value The value to assign.
+	       */
 
-	    var __via = __first && __last;
 
-	    var __from = __first && !__oneWay || __last;
+	      function baseAssignValue(object, key, value) {
+	        if (key == '__proto__' && defineProperty) {
+	          defineProperty(object, key, {
+	            'configurable': true,
+	            'enumerable': true,
+	            'value': value,
+	            'writable': true
+	          });
+	        } else {
+	          object[key] = value;
+	        }
+	      }
+	      /**
+	       * The base implementation of `_.at` without support for individual paths.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {string[]} paths The property paths to pick.
+	       * @returns {Array} Returns the picked elements.
+	       */
 
-	    var __to = __first || __last && !__oneWay;
 
-	    return way.update({
-	      __first: __first,
-	      __last: __last,
-	      __from: __from,
-	      __via: __via,
-	      __to: __to,
-	      __oneWay: __oneWay
-	    });
-	  }
+	      function baseAt(object, paths) {
+	        var index = -1,
+	            length = paths.length,
+	            result = Array(length),
+	            skip = object == null;
 
-	  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
+	        while (++index < length) {
+	          result[index] = skip ? undefined$1 : get(object, paths[index]);
+	        }
 
-	  var keepGoing;
-	  var removeWayIds = [];
-	  var removeVertexIds = [];
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.clamp` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {number} number The number to clamp.
+	       * @param {number} [lower] The lower bound.
+	       * @param {number} upper The upper bound.
+	       * @returns {number} Returns the clamped number.
+	       */
 
-	  do {
-	    keepGoing = false;
-	    checkVertices = vertexIds.slice();
 
-	    for (i = 0; i < checkVertices.length; i++) {
-	      var vertexId = checkVertices[i];
-	      vertex = vgraph.hasEntity(vertexId);
+	      function baseClamp(number, lower, upper) {
+	        if (number === number) {
+	          if (upper !== undefined$1) {
+	            number = number <= upper ? number : upper;
+	          }
 
-	      if (!vertex) {
-	        if (vertexIds.indexOf(vertexId) !== -1) {
-	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	          if (lower !== undefined$1) {
+	            number = number >= lower ? number : lower;
+	          }
 	        }
 
-	        removeVertexIds.push(vertexId);
-	        continue;
+	        return number;
 	      }
+	      /**
+	       * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+	       * traversed objects.
+	       *
+	       * @private
+	       * @param {*} value The value to clone.
+	       * @param {boolean} bitmask The bitmask flags.
+	       *  1 - Deep clone
+	       *  2 - Flatten inherited properties
+	       *  4 - Clone symbols
+	       * @param {Function} [customizer] The function to customize cloning.
+	       * @param {string} [key] The key of `value`.
+	       * @param {Object} [object] The parent object of `value`.
+	       * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+	       * @returns {*} Returns the cloned value.
+	       */
 
-	      parents = vgraph.parentWays(vertex);
 
-	      if (parents.length < 3) {
-	        if (vertexIds.indexOf(vertexId) !== -1) {
-	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	      function baseClone(value, bitmask, customizer, key, object, stack) {
+	        var result,
+	            isDeep = bitmask & CLONE_DEEP_FLAG,
+	            isFlat = bitmask & CLONE_FLAT_FLAG,
+	            isFull = bitmask & CLONE_SYMBOLS_FLAG;
+
+	        if (customizer) {
+	          result = object ? customizer(value, key, object, stack) : customizer(value);
 	        }
-	      }
 
-	      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 (result !== undefined$1) {
+	          return result;
+	        }
 
-	        if (aIsLeaf && !bIsLeaf) {
-	          leaf = a;
-	          survivor = b;
-	        } else if (!aIsLeaf && bIsLeaf) {
-	          leaf = b;
-	          survivor = a;
+	        if (!isObject(value)) {
+	          return value;
 	        }
 
-	        if (leaf && survivor) {
-	          survivor = withMetadata(survivor, vertexIds); // update survivor way
+	        var isArr = isArray(value);
 
-	          vgraph = vgraph.replace(survivor).remove(leaf); // update graph
+	        if (isArr) {
+	          result = initCloneArray(value);
 
-	          removeWayIds.push(leaf.id);
-	          keepGoing = true;
+	          if (!isDeep) {
+	            return copyArray(value, result);
+	          }
+	        } else {
+	          var tag = getTag(value),
+	              isFunc = tag == funcTag || tag == genTag;
+
+	          if (isBuffer(value)) {
+	            return cloneBuffer(value, isDeep);
+	          }
+
+	          if (tag == objectTag || tag == argsTag || isFunc && !object) {
+	            result = isFlat || isFunc ? {} : initCloneObject(value);
+
+	            if (!isDeep) {
+	              return isFlat ? copySymbolsIn(value, baseAssignIn(result, value)) : copySymbols(value, baseAssign(result, value));
+	            }
+	          } else {
+	            if (!cloneableTags[tag]) {
+	              return object ? value : {};
+	            }
+
+	            result = initCloneByTag(value, tag, isDeep);
+	          }
+	        } // Check for circular references and return its corresponding clone.
+
+
+	        stack || (stack = new Stack());
+	        var stacked = stack.get(value);
+
+	        if (stacked) {
+	          return stacked;
 	        }
-	      }
 
-	      parents = vgraph.parentWays(vertex);
+	        stack.set(value, result);
 
-	      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
+	        if (isSet(value)) {
+	          value.forEach(function (subValue) {
+	            result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
+	          });
+	        } else if (isMap(value)) {
+	          value.forEach(function (subValue, key) {
+	            result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
+	          });
 	        }
 
-	        removeVertexIds.push(vertexId);
-	        keepGoing = true;
-	      }
+	        var keysFunc = isFull ? isFlat ? getAllKeysIn : getAllKeys : isFlat ? keysIn : keys;
+	        var props = isArr ? undefined$1 : keysFunc(value);
+	        arrayEach(props || value, function (subValue, key) {
+	          if (props) {
+	            key = subValue;
+	            subValue = value[key];
+	          } // Recursively populate clone (susceptible to call stack limits).
 
-	      if (parents.length < 1) {
-	        // vertex is no longer attached to anything
-	        vgraph = vgraph.remove(vertex);
+
+	          assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
+	        });
+	        return result;
 	      }
-	    }
-	  } while (keepGoing);
+	      /**
+	       * The base implementation of `_.conforms` which doesn't clone `source`.
+	       *
+	       * @private
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {Function} Returns the new spec function.
+	       */
 
-	  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.
-	  //
+	      function baseConforms(source) {
+	        var props = keys(source);
+	        return function (object) {
+	          return baseConformsTo(object, source, props);
+	        };
+	      }
+	      /**
+	       * The base implementation of `_.conformsTo` which accepts `props` to check.
+	       *
+	       * @private
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+	       */
 
-	  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 baseConformsTo(object, source, props) {
+	        var length = props.length;
 
-	    function step(entity, currPath, currRestrictions, matchedRestriction) {
-	      currPath = (currPath || []).slice(); // shallow copy
+	        if (object == null) {
+	          return !length;
+	        }
 
-	      if (currPath.length >= maxPathLength) return;
-	      currPath.push(entity.id);
-	      currRestrictions = (currRestrictions || []).slice(); // shallow copy
+	        object = Object(object);
 
-	      var i, j;
+	        while (length--) {
+	          var key = props[length],
+	              predicate = source[key],
+	              value = object[key];
 
-	      if (entity.type === 'node') {
-	        var parents = vgraph.parentWays(entity);
-	        var nextWays = []; // which ways can we step into?
+	          if (value === undefined$1 && !(key in object) || !predicate(value)) {
+	            return false;
+	          }
+	        }
 
-	        for (i = 0; i < parents.length; i++) {
-	          var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
+	        return true;
+	      }
+	      /**
+	       * The base implementation of `_.delay` and `_.defer` which accepts `args`
+	       * to provide to `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to delay.
+	       * @param {number} wait The number of milliseconds to delay invocation.
+	       * @param {Array} args The arguments to provide to `func`.
+	       * @returns {number|Object} Returns the timer id or timeout object.
+	       */
 
-	          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`)
+	      function baseDelay(func, wait, args) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	          var restrict = null;
+	        return setTimeout(function () {
+	          func.apply(undefined$1, args);
+	        }, wait);
+	      }
+	      /**
+	       * The base implementation of methods like `_.difference` without support
+	       * for excluding multiple arrays or iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {Array} values The values to exclude.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       */
 
-	          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;
+	      function baseDifference(array, values, iteratee, comparator) {
+	        var index = -1,
+	            includes = arrayIncludes,
+	            isCommon = true,
+	            length = array.length,
+	            result = [],
+	            valuesLength = values.length;
 
-	            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 = [];
+	        if (!length) {
+	          return result;
+	        }
 
-	                for (k = 2; k < currPath.length; k += 2) {
-	                  // k = 2 skips FROM
-	                  pathVias.push(currPath[k]); // (path goes way-node-way...)
-	                }
+	        if (iteratee) {
+	          values = arrayMap(values, baseUnary(iteratee));
+	        }
 
-	                var restrictionVias = [];
+	        if (comparator) {
+	          includes = arrayIncludesWith;
+	          isCommon = false;
+	        } else if (values.length >= LARGE_ARRAY_SIZE) {
+	          includes = cacheHas;
+	          isCommon = false;
+	          values = new SetCache(values);
+	        }
 
-	                for (k = 0; k < v.length; k++) {
-	                  if (v[k].type === 'way') {
-	                    restrictionVias.push(v[k].id);
-	                  }
-	                }
+	        outer: while (++index < length) {
+	          var value = array[index],
+	              computed = iteratee == null ? value : iteratee(value);
+	          value = comparator || value !== 0 ? value : 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 (isCommon && computed === computed) {
+	            var valuesIndex = valuesLength;
+
+	            while (valuesIndex--) {
+	              if (values[valuesIndex] === computed) {
+	                continue outer;
 	              }
 	            }
 
-	            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)
+	            result.push(value);
+	          } else if (!includes(values, computed, comparator)) {
+	            result.push(value);
+	          }
+	        }
 
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.forEach` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       */
 
-	            if (restrict && restrict.direct) break;
-	          }
 
-	          nextWays.push({
-	            way: way,
-	            restrict: restrict
-	          });
-	        }
+	      var baseEach = createBaseEach(baseForOwn);
+	      /**
+	       * The base implementation of `_.forEachRight` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       */
 
-	        nextWays.forEach(function (nextWay) {
-	          step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+	      var baseEachRight = createBaseEach(baseForOwnRight, true);
+	      /**
+	       * The base implementation of `_.every` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @returns {boolean} Returns `true` if all elements pass the predicate check,
+	       *  else `false`
+	       */
+
+	      function baseEvery(collection, predicate) {
+	        var result = true;
+	        baseEach(collection, function (value, index, collection) {
+	          result = !!predicate(value, index, collection);
+	          return result;
 	        });
-	      } 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)
+	        return result;
+	      }
+	      /**
+	       * The base implementation of methods like `_.max` and `_.min` which accepts a
+	       * `comparator` to determine the extremum value.
+	       *
+	       * @private
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} iteratee The iteratee invoked per iteration.
+	       * @param {Function} comparator The comparator used to compare values.
+	       * @returns {*} Returns the extremum value.
+	       */
 
-	          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);
+	      function baseExtremum(array, iteratee, comparator) {
+	        var index = -1,
+	            length = array.length;
 
-	          if (turn) {
-	            if (matchedRestriction) {
-	              turn.restrictionID = matchedRestriction.id;
-	              turn.no = matchedRestriction.no;
-	              turn.only = matchedRestriction.only;
-	              turn.direct = matchedRestriction.direct;
-	            }
+	        while (++index < length) {
+	          var value = array[index],
+	              current = iteratee(value);
 
-	            turns.push(osmTurn(turn));
+	          if (current != null && (computed === undefined$1 ? current === current && !isSymbol(current) : comparator(current, computed))) {
+	            var computed = current,
+	                result = value;
 	          }
-
-	          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?
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.fill` without an iteratee call guard.
+	       *
+	       * @private
+	       * @param {Array} array The array to fill.
+	       * @param {*} value The value to fill `array` with.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	        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
+	      function baseFill(array, value, start, end) {
+	        var length = array.length;
+	        start = toInteger(start);
 
-	          if (!entity.__via) return; // this way is a leaf / can't be a via
+	        if (start < 0) {
+	          start = -start > length ? 0 : length + start;
 	        }
 
-	        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
+	        end = end === undefined$1 || end > length ? length : toInteger(end);
+
+	        if (end < 0) {
+	          end += length;
 	        }
 
-	        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
+	        end = start > end ? 0 : toLength(end);
+
+	        while (start < end) {
+	          array[start++] = value;
 	        }
 
-	        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
+	        return array;
+	      }
+	      /**
+	       * The base implementation of `_.filter` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @returns {Array} Returns the new filtered array.
+	       */
+
+
+	      function baseFilter(collection, predicate) {
+	        var result = [];
+	        baseEach(collection, function (value, index, collection) {
+	          if (predicate(value, index, collection)) {
+	            result.push(value);
+	          }
+	        });
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.flatten` with support for restricting flattening.
+	       *
+	       * @private
+	       * @param {Array} array The array to flatten.
+	       * @param {number} depth The maximum recursion depth.
+	       * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+	       * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+	       * @param {Array} [result=[]] The initial result value.
+	       * @returns {Array} Returns the new flattened array.
+	       */
+
 
-	            var isOnlyVia = false;
-	            var v = r.membersByRole('via');
+	      function baseFlatten(array, depth, predicate, isStrict, result) {
+	        var index = -1,
+	            length = array.length;
+	        predicate || (predicate = isFlattenable);
+	        result || (result = []);
 
-	            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);
+	        while (++index < length) {
+	          var value = array[index];
 
-	                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-	                  isOnlyVia = true;
-	                  break;
-	                }
-	              }
+	          if (depth > 0 && predicate(value)) {
+	            if (depth > 1) {
+	              // Recursively flatten arrays (susceptible to call stack limits).
+	              baseFlatten(value, depth - 1, predicate, isStrict, result);
+	            } else {
+	              arrayPush(result, value);
 	            }
+	          } else if (!isStrict) {
+	            result[result.length] = value;
+	          }
+	        }
 
-	            return isOnlyVia;
-	          });
-	          step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-	        });
+	        return result;
 	      }
-	    } // assumes path is alternating way-node-way of odd length
+	      /**
+	       * The base implementation of `baseForOwn` which iterates over `object`
+	       * properties returned by `keysFunc` and invokes `iteratee` for each property.
+	       * Iteratee functions may exit iteration early by explicitly returning `false`.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @param {Function} keysFunc The function to get the keys of `object`.
+	       * @returns {Object} Returns `object`.
+	       */
 
 
-	    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];
+	      var baseFor = createBaseFor();
+	      /**
+	       * This function is like `baseFor` except that it iterates over properties
+	       * in the opposite order.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @param {Function} keysFunc The function to get the keys of `object`.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	      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);
+	      var baseForRight = createBaseFor(true);
+	      /**
+	       * The base implementation of `_.forOwn` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	        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
-	        }
+	      function baseForOwn(object, iteratee) {
+	        return object && baseFor(object, iteratee, keys);
 	      }
+	      /**
+	       * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	      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];
+	      function baseForOwnRight(object, iteratee) {
+	        return object && baseForRight(object, iteratee, keys);
 	      }
-	    }
-	  };
+	      /**
+	       * The base implementation of `_.functions` which creates an array of
+	       * `object` function property names filtered from `props`.
+	       *
+	       * @private
+	       * @param {Object} object The object to inspect.
+	       * @param {Array} props The property names to filter.
+	       * @returns {Array} Returns the function names.
+	       */
 
-	  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;
-	  }
+	      function baseFunctions(object, props) {
+	        return arrayFilter(props, function (key) {
+	          return isFunction(object[key]);
+	        });
+	      }
+	      /**
+	       * The base implementation of `_.get` without support for default values.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the property to get.
+	       * @returns {*} Returns the resolved value.
+	       */
 
-	  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)
+	      function baseGet(object, path) {
+	        path = castPath(path, object);
+	        var index = 0,
+	            length = path.length;
 
-	  if (angle < 158) return 'no_right_turn';
-	  if (angle > 202) return 'no_left_turn';
-	  return 'no_straight_on';
-	}
+	        while (object != null && index < length) {
+	          object = object[toKey(path[index++])];
+	        }
 
-	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 index && index == length ? object : undefined$1;
 	      }
-	    });
-	    return Object.assign({
-	      closedWay: [],
-	      multipolygon: [],
-	      other: []
-	    }, geometryGroups);
-	  }
-
-	  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.
+	      /**
+	       * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+	       * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+	       * symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Function} keysFunc The function to get the keys of `object`.
+	       * @param {Function} symbolsFunc The function to get the symbols of `object`.
+	       * @returns {Array} Returns the array of property names and symbols.
+	       */
 
-	    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
+	      function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+	        var result = keysFunc(object);
+	        return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+	      }
+	      /**
+	       * The base implementation of `getTag` without fallbacks for buggy environments.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @returns {string} Returns the `toStringTag`.
+	       */
 
-	    var members = [];
-	    var outer = true;
 
-	    while (polygons.length) {
-	      extractUncontained(polygons);
-	      polygons = polygons.filter(isContained);
-	      contained = contained.filter(isContained).map(filterContained);
-	    }
+	      function baseGetTag(value) {
+	        if (value == null) {
+	          return value === undefined$1 ? undefinedTag : nullTag;
+	        }
 
-	    function isContained(d, i) {
-	      return contained[i].some(function (val) {
-	        return val;
-	      });
-	    }
+	        return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+	      }
+	      /**
+	       * The base implementation of `_.gt` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is greater than `other`,
+	       *  else `false`.
+	       */
 
-	    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
+	      function baseGt(value, other) {
+	        return value > other;
+	      }
+	      /**
+	       * The base implementation of `_.has` without support for deep paths.
+	       *
+	       * @private
+	       * @param {Object} [object] The object to query.
+	       * @param {Array|string} key The key to check.
+	       * @returns {boolean} Returns `true` if `key` exists, else `false`.
+	       */
 
 
-	    var relation = entities.multipolygon[0] || osmRelation({
-	      id: newRelationId,
-	      tags: {
-	        type: 'multipolygon'
+	      function baseHas(object, key) {
+	        return object != null && hasOwnProperty.call(object, key);
 	      }
-	    });
-	    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';
+	      /**
+	       * The base implementation of `_.hasIn` without support for deep paths.
+	       *
+	       * @private
+	       * @param {Object} [object] The object to query.
+	       * @param {Array|string} key The key to check.
+	       * @returns {boolean} Returns `true` if `key` exists, else `false`.
+	       */
+
+
+	      function baseHasIn(object, key) {
+	        return object != null && key in Object(object);
 	      }
+	      /**
+	       * The base implementation of `_.inRange` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {number} number The number to check.
+	       * @param {number} start The start of the range.
+	       * @param {number} end The end of the range.
+	       * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+	       */
 
-	      if (members.some(isThisOuter)) {
-	        relation = relation.mergeTags(way.tags);
-	        graph = graph.replace(way.update({
-	          tags: {}
-	        }));
+
+	      function baseInRange(number, start, end) {
+	        return number >= nativeMin(start, end) && number < nativeMax(start, end);
 	      }
-	    });
-	    return graph.replace(relation.update({
-	      members: members,
-	      tags: utilObjectOmit(relation.tags, ['area'])
-	    }));
-	  };
+	      /**
+	       * The base implementation of methods like `_.intersection`, without support
+	       * for iteratee shorthands, that accepts an array of arrays to inspect.
+	       *
+	       * @private
+	       * @param {Array} arrays The arrays to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of shared values.
+	       */
 
-	  action.disabled = function (graph) {
-	    var entities = groupEntities(graph);
 
-	    if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
-	      return 'not_eligible';
-	    }
+	      function baseIntersection(arrays, iteratee, comparator) {
+	        var includes = comparator ? arrayIncludesWith : arrayIncludes,
+	            length = arrays[0].length,
+	            othLength = arrays.length,
+	            othIndex = othLength,
+	            caches = Array(othLength),
+	            maxLength = Infinity,
+	            result = [];
 
-	    if (!entities.multipolygon.every(function (r) {
-	      return r.isComplete(graph);
-	    })) {
-	      return 'incomplete_relation';
-	    }
+	        while (othIndex--) {
+	          var array = arrays[othIndex];
 
-	    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));
+	          if (othIndex && iteratee) {
+	            array = arrayMap(array, baseUnary(iteratee));
+	          }
+
+	          maxLength = nativeMin(array.length, maxLength);
+	          caches[othIndex] = !comparator && (iteratee || length >= 120 && array.length >= 120) ? new SetCache(othIndex && array) : undefined$1;
 	        }
-	      });
-	      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';
-	    }
-	  };
+	        array = arrays[0];
+	        var index = -1,
+	            seen = caches[0];
 
-	  return action;
-	}
+	        outer: while (++index < length && result.length < maxLength) {
+	          var value = array[index],
+	              computed = iteratee ? iteratee(value) : value;
+	          value = comparator || value !== 0 ? value : 0;
 
-	var UNSUPPORTED_Y$3 = regexpStickyHelpers.UNSUPPORTED_Y;
+	          if (!(seen ? cacheHas(seen, computed) : includes(result, computed, comparator))) {
+	            othIndex = othLength;
 
-	// `RegExp.prototype.flags` getter
-	// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
-	if (descriptors && (/./g.flags != 'g' || UNSUPPORTED_Y$3)) {
-	  objectDefineProperty.f(RegExp.prototype, 'flags', {
-	    configurable: true,
-	    get: regexpFlags
-	  });
-	}
+	            while (--othIndex) {
+	              var cache = caches[othIndex];
 
-	var fastDeepEqual = function equal(a, b) {
-	  if (a === b) return true;
+	              if (!(cache ? cacheHas(cache, computed) : includes(arrays[othIndex], computed, comparator))) {
+	                continue outer;
+	              }
+	            }
 
-	  if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
-	    if (a.constructor !== b.constructor) return false;
-	    var length, i, keys;
+	            if (seen) {
+	              seen.push(computed);
+	            }
 
-	    if (Array.isArray(a)) {
-	      length = a.length;
-	      if (length != b.length) return false;
+	            result.push(value);
+	          }
+	        }
 
-	      for (i = length; i-- !== 0;) {
-	        if (!equal(a[i], b[i])) return false;
+	        return result;
 	      }
+	      /**
+	       * The base implementation of `_.invert` and `_.invertBy` which inverts
+	       * `object` with values transformed by `iteratee` and set by `setter`.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} setter The function to set `accumulator` values.
+	       * @param {Function} iteratee The iteratee to transform values.
+	       * @param {Object} accumulator The initial inverted object.
+	       * @returns {Function} Returns `accumulator`.
+	       */
 
-	      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;
-	    }
+	      function baseInverter(object, setter, iteratee, accumulator) {
+	        baseForOwn(object, function (value, key, object) {
+	          setter(accumulator, iteratee(value), key, object);
+	        });
+	        return accumulator;
+	      }
+	      /**
+	       * The base implementation of `_.invoke` without support for individual
+	       * method arguments.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the method to invoke.
+	       * @param {Array} args The arguments to invoke the method with.
+	       * @returns {*} Returns the result of the invoked method.
+	       */
 
-	    return true;
-	  } // true if both NaN, false otherwise
 
+	      function baseInvoke(object, path, args) {
+	        path = castPath(path, object);
+	        object = parent(object, path);
+	        var func = object == null ? object : object[toKey(last(path))];
+	        return func == null ? undefined$1 : apply(func, object, args);
+	      }
+	      /**
+	       * The base implementation of `_.isArguments`.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+	       */
 
-	  return a !== a && b !== b;
-	};
 
-	// 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 baseIsArguments(value) {
+	        return isObjectLike(value) && baseGetTag(value) == argsTag;
+	      }
+	      /**
+	       * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+	       */
 
-	function LCS(buffer1, buffer2) {
-	  var equivalenceClasses = {};
 
-	  for (var j = 0; j < buffer2.length; j++) {
-	    var item = buffer2[j];
+	      function baseIsArrayBuffer(value) {
+	        return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
+	      }
+	      /**
+	       * The base implementation of `_.isDate` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+	       */
 
-	    if (equivalenceClasses[item]) {
-	      equivalenceClasses[item].push(j);
-	    } else {
-	      equivalenceClasses[item] = [j];
-	    }
-	  }
 
-	  var NULLRESULT = {
-	    buffer1index: -1,
-	    buffer2index: -1,
-	    chain: null
-	  };
-	  var candidates = [NULLRESULT];
+	      function baseIsDate(value) {
+	        return isObjectLike(value) && baseGetTag(value) == dateTag;
+	      }
+	      /**
+	       * The base implementation of `_.isEqual` which supports partial comparisons
+	       * and tracks traversed objects.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @param {boolean} bitmask The bitmask flags.
+	       *  1 - Unordered comparison
+	       *  2 - Partial comparison
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       */
 
-	  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;
+	      function baseIsEqual(value, other, bitmask, customizer, stack) {
+	        if (value === other) {
+	          return true;
+	        }
 
-	      for (s = r; s < candidates.length; s++) {
-	        if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
-	          break;
+	        if (value == null || other == null || !isObjectLike(value) && !isObjectLike(other)) {
+	          return value !== value && other !== other;
 	        }
+
+	        return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
 	      }
+	      /**
+	       * A specialized version of `baseIsEqual` for arrays and objects which performs
+	       * deep comparisons and tracks traversed objects enabling objects with circular
+	       * references to be compared.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+	       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+	       */
 
-	      if (s < candidates.length) {
-	        var newCandidate = {
-	          buffer1index: i,
-	          buffer2index: _j,
-	          chain: candidates[s]
-	        };
 
-	        if (r === candidates.length) {
-	          candidates.push(c);
-	        } else {
-	          candidates[r] = c;
+	      function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+	        var objIsArr = isArray(object),
+	            othIsArr = isArray(other),
+	            objTag = objIsArr ? arrayTag : getTag(object),
+	            othTag = othIsArr ? arrayTag : getTag(other);
+	        objTag = objTag == argsTag ? objectTag : objTag;
+	        othTag = othTag == argsTag ? objectTag : othTag;
+	        var objIsObj = objTag == objectTag,
+	            othIsObj = othTag == objectTag,
+	            isSameTag = objTag == othTag;
+
+	        if (isSameTag && isBuffer(object)) {
+	          if (!isBuffer(other)) {
+	            return false;
+	          }
+
+	          objIsArr = true;
+	          objIsObj = false;
 	        }
 
-	        r = s + 1;
-	        c = newCandidate;
+	        if (isSameTag && !objIsObj) {
+	          stack || (stack = new Stack());
+	          return objIsArr || isTypedArray(object) ? equalArrays(object, other, bitmask, customizer, equalFunc, stack) : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+	        }
 
-	        if (r === candidates.length) {
-	          break; // no point in examining further (j)s
+	        if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+	          var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+	              othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+	          if (objIsWrapped || othIsWrapped) {
+	            var objUnwrapped = objIsWrapped ? object.value() : object,
+	                othUnwrapped = othIsWrapped ? other.value() : other;
+	            stack || (stack = new Stack());
+	            return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
+	          }
 	        }
-	      }
-	    }
 
-	    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].
+	        if (!isSameTag) {
+	          return false;
+	        }
 
+	        stack || (stack = new Stack());
+	        return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+	      }
+	      /**
+	       * The base implementation of `_.isMap` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+	       */
 
-	  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 baseIsMap(value) {
+	        return isObjectLike(value) && getTag(value) == mapTag;
+	      }
+	      /**
+	       * The base implementation of `_.isMatch` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property values to match.
+	       * @param {Array} matchData The property names, values, and compare flags to match.
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+	       */
 
-	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;
+	      function baseIsMatch(object, source, matchData, customizer) {
+	        var index = matchData.length,
+	            length = index,
+	            noCustomizer = !customizer;
 
-	    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)
-	      });
-	    }
-	  }
+	        if (object == null) {
+	          return !length;
+	        }
 
-	  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)
-	//
+	        object = Object(object);
 
+	        while (index--) {
+	          var data = matchData[index];
 
-	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 = [];
+	          if (noCustomizer && data[2] ? data[1] !== object[data[0]] : !(data[0] in object)) {
+	            return false;
+	          }
+	        }
 
-	  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])
+	        while (++index < length) {
+	          data = matchData[index];
+	          var key = data[0],
+	              objValue = object[key],
+	              srcValue = data[1];
 
-	    });
-	  }
+	          if (noCustomizer && data[2]) {
+	            if (objValue === undefined$1 && !(key in object)) {
+	              return false;
+	            }
+	          } else {
+	            var stack = new Stack();
 
-	  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;
+	            if (customizer) {
+	              var result = customizer(objValue, srcValue, key, object, source, stack);
+	            }
 
-	  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 (!(result === undefined$1 ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) : result)) {
+	              return false;
+	            }
+	          }
+	        }
 
-	  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
+	        return true;
+	      }
+	      /**
+	       * The base implementation of `_.isNative` without bad shim checks.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a native function,
+	       *  else `false`.
+	       */
 
-	    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());
-	    }
+	      function baseIsNative(value) {
+	        if (!isObject(value) || isMasked(value)) {
+	          return false;
+	        }
 
-	    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)
-	        });
+	        var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+	        return pattern.test(toSource(value));
 	      }
-	    } 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]
-	      };
+	      /**
+	       * The base implementation of `_.isRegExp` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+	       */
 
-	      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]);
+
+	      function baseIsRegExp(value) {
+	        return isObjectLike(value) && baseGetTag(value) == regexpTag;
 	      }
+	      /**
+	       * The base implementation of `_.isSet` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+	       */
 
-	      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;
-	  }
+	      function baseIsSet(value) {
+	        return isObjectLike(value) && getTag(value) == setTag;
+	      }
+	      /**
+	       * The base implementation of `_.isTypedArray` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+	       */
 
-	  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 baseIsTypedArray(value) {
+	        return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+	      }
+	      /**
+	       * The base implementation of `_.iteratee`.
+	       *
+	       * @private
+	       * @param {*} [value=_.identity] The value to convert to an iteratee.
+	       * @returns {Function} Returns the iteratee.
+	       */
 
-	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
-	      });
-	    }
+	      function baseIteratee(value) {
+	        // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+	        // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+	        if (typeof value == 'function') {
+	          return value;
+	        }
 
-	    okBuffer = [];
-	  }
+	        if (value == null) {
+	          return identity;
+	        }
 
-	  function isFalseConflict(a, b) {
-	    if (a.length !== b.length) return false;
+	        if (_typeof(value) == 'object') {
+	          return isArray(value) ? baseMatchesProperty(value[0], value[1]) : baseMatches(value);
+	        }
 
-	    for (var i = 0; i < a.length; i++) {
-	      if (a[i] !== b[i]) return false;
-	    }
+	        return property(value);
+	      }
+	      /**
+	       * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	    return true;
-	  }
 
-	  regions.forEach(function (region) {
-	    if (region.stable) {
-	      var _okBuffer;
+	      function baseKeys(object) {
+	        if (!isPrototype(object)) {
+	          return nativeKeys(object);
+	        }
 
-	      (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
-	    } else {
-	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-	        var _okBuffer2;
+	        var result = [];
 
-	        (_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
+	        for (var key in Object(object)) {
+	          if (hasOwnProperty.call(object, key) && key != 'constructor') {
+	            result.push(key);
 	          }
-	        });
+	        }
+
+	        return result;
 	      }
-	    }
-	  });
-	  flushOk();
-	  return results;
-	}
+	      /**
+	       * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-	  discardTags = discardTags || {};
-	  var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
-	  var _conflicts = [];
+	      function baseKeysIn(object) {
+	        if (!isObject(object)) {
+	          return nativeKeysIn(object);
+	        }
 
-	  function user(d) {
-	    return typeof formatUser === 'function' ? formatUser(d) : d;
-	  }
+	        var isProto = isPrototype(object),
+	            result = [];
 
-	  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;
-	    }
+	        for (var key in object) {
+	          if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+	            result.push(key);
+	          }
+	        }
 
-	    if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-	      return target;
-	    }
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.lt` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is less than `other`,
+	       *  else `false`.
+	       */
 
-	    if (_option === 'force_remote') {
-	      return target.update({
-	        loc: remote.loc
-	      });
-	    }
 
-	    _conflicts.push(_t('merge_remote_changes.conflict.location', {
-	      user: user(remote.user)
-	    }));
+	      function baseLt(value, other) {
+	        return value < other;
+	      }
+	      /**
+	       * The base implementation of `_.map` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Array} Returns the new mapped array.
+	       */
 
-	    return target;
-	  }
 
-	  function mergeNodes(base, remote, target) {
-	    if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-	      return target;
-	    }
+	      function baseMap(collection, iteratee) {
+	        var index = -1,
+	            result = isArrayLike(collection) ? Array(collection.length) : [];
+	        baseEach(collection, function (value, key, collection) {
+	          result[++index] = iteratee(value, key, collection);
+	        });
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.matches` which doesn't clone `source`.
+	       *
+	       * @private
+	       * @param {Object} source The object of property values to match.
+	       * @returns {Function} Returns the new spec function.
+	       */
 
-	    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
-	    });
+	      function baseMatches(source) {
+	        var matchData = getMatchData(source);
 
-	    for (var i = 0; i < hunks.length; i++) {
-	      var hunk = hunks[i];
+	        if (matchData.length == 1 && matchData[0][2]) {
+	          return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+	        }
 
-	      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;
+	        return function (object) {
+	          return object === source || baseIsMatch(object, source, matchData);
+	        };
+	      }
+	      /**
+	       * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+	       *
+	       * @private
+	       * @param {string} path The path of the property to get.
+	       * @param {*} srcValue The value to match.
+	       * @returns {Function} Returns the new spec function.
+	       */
 
-	        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;
+	      function baseMatchesProperty(path, srcValue) {
+	        if (isKey(path) && isStrictComparable(srcValue)) {
+	          return matchesStrictComparable(toKey(path), srcValue);
 	        }
+
+	        return function (object) {
+	          var objValue = get(object, path);
+	          return objValue === undefined$1 && objValue === srcValue ? hasIn(object, path) : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
+	        };
 	      }
-	    }
+	      /**
+	       * The base implementation of `_.merge` without support for multiple sources.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @param {number} srcIndex The index of `source`.
+	       * @param {Function} [customizer] The function to customize merged values.
+	       * @param {Object} [stack] Tracks traversed source values and their merged
+	       *  counterparts.
+	       */
 
-	    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;
-	    }
+	      function baseMerge(object, source, srcIndex, customizer, stack) {
+	        if (object === source) {
+	          return;
+	        }
 
-	    var ccount = _conflicts.length;
+	        baseFor(source, function (srcValue, key) {
+	          stack || (stack = new Stack());
 
-	    for (var i = 0; i < children.length; i++) {
-	      var id = children[i];
-	      var node = graph.hasEntity(id); // remove unused childNodes..
+	          if (isObject(srcValue)) {
+	            baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+	          } else {
+	            var newValue = customizer ? customizer(safeGet(object, key), srcValue, key + '', object, source, stack) : undefined$1;
 
-	      if (targetWay.nodes.indexOf(id) === -1) {
-	        if (node && !isUsed(node, targetWay)) {
-	          updates.removeIds.push(id);
+	            if (newValue === undefined$1) {
+	              newValue = srcValue;
+	            }
+
+	            assignMergeValue(object, key, newValue);
+	          }
+	        }, keysIn);
+	      }
+	      /**
+	       * A specialized version of `baseMerge` for arrays and objects which performs
+	       * deep merges and tracks traversed objects enabling objects with circular
+	       * references to be merged.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @param {string} key The key of the value to merge.
+	       * @param {number} srcIndex The index of `source`.
+	       * @param {Function} mergeFunc The function to merge values.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @param {Object} [stack] Tracks traversed source values and their merged
+	       *  counterparts.
+	       */
+
+
+	      function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+	        var objValue = safeGet(object, key),
+	            srcValue = safeGet(source, key),
+	            stacked = stack.get(srcValue);
+
+	        if (stacked) {
+	          assignMergeValue(object, key, stacked);
+	          return;
 	        }
 
-	        continue;
-	      } // restore used childNodes..
+	        var newValue = customizer ? customizer(objValue, srcValue, key + '', object, source, stack) : undefined$1;
+	        var isCommon = newValue === undefined$1;
+
+	        if (isCommon) {
+	          var isArr = isArray(srcValue),
+	              isBuff = !isArr && isBuffer(srcValue),
+	              isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+	          newValue = srcValue;
+
+	          if (isArr || isBuff || isTyped) {
+	            if (isArray(objValue)) {
+	              newValue = objValue;
+	            } else if (isArrayLikeObject(objValue)) {
+	              newValue = copyArray(objValue);
+	            } else if (isBuff) {
+	              isCommon = false;
+	              newValue = cloneBuffer(srcValue, true);
+	            } else if (isTyped) {
+	              isCommon = false;
+	              newValue = cloneTypedArray(srcValue, true);
+	            } else {
+	              newValue = [];
+	            }
+	          } else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+	            newValue = objValue;
 
+	            if (isArguments(objValue)) {
+	              newValue = toPlainObject(objValue);
+	            } else if (!isObject(objValue) || isFunction(objValue)) {
+	              newValue = initCloneObject(srcValue);
+	            }
+	          } else {
+	            isCommon = false;
+	          }
+	        }
 
-	      var local = localGraph.hasEntity(id);
-	      var remote = remoteGraph.hasEntity(id);
-	      var target;
+	        if (isCommon) {
+	          // Recursively merge objects and arrays (susceptible to call stack limits).
+	          stack.set(srcValue, newValue);
+	          mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+	          stack['delete'](srcValue);
+	        }
 
-	      if (_option === 'force_remote' && remote && remote.visible) {
-	        updates.replacements.push(remote);
-	      } else if (_option === 'force_local' && local) {
-	        target = osmEntity(local);
+	        assignMergeValue(object, key, newValue);
+	      }
+	      /**
+	       * The base implementation of `_.nth` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {Array} array The array to query.
+	       * @param {number} n The index of the element to return.
+	       * @returns {*} Returns the nth element of `array`.
+	       */
 
-	        if (remote) {
-	          target = target.update({
-	            version: remote.version
-	          });
+
+	      function baseNth(array, n) {
+	        var length = array.length;
+
+	        if (!length) {
+	          return;
 	        }
 
-	        updates.replacements.push(target);
-	      } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-	        target = osmEntity(local, {
-	          version: remote.version
-	        });
+	        n += n < 0 ? length : 0;
+	        return isIndex(n, length) ? array[n] : undefined$1;
+	      }
+	      /**
+	       * The base implementation of `_.orderBy` without param guards.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+	       * @param {string[]} orders The sort orders of `iteratees`.
+	       * @returns {Array} Returns the new sorted array.
+	       */
 
-	        if (remote.visible) {
-	          target = mergeLocation(remote, target);
+
+	      function baseOrderBy(collection, iteratees, orders) {
+	        if (iteratees.length) {
+	          iteratees = arrayMap(iteratees, function (iteratee) {
+	            if (isArray(iteratee)) {
+	              return function (value) {
+	                return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee);
+	              };
+	            }
+
+	            return iteratee;
+	          });
 	        } else {
-	          _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-	            user: user(remote.user)
-	          }));
+	          iteratees = [identity];
 	        }
 
-	        if (_conflicts.length !== ccount) break;
-	        updates.replacements.push(target);
+	        var index = -1;
+	        iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+	        var result = baseMap(collection, function (value, key, collection) {
+	          var criteria = arrayMap(iteratees, function (iteratee) {
+	            return iteratee(value);
+	          });
+	          return {
+	            'criteria': criteria,
+	            'index': ++index,
+	            'value': value
+	          };
+	        });
+	        return baseSortBy(result, function (object, other) {
+	          return compareMultiple(object, other, orders);
+	        });
 	      }
-	    }
+	      /**
+	       * The base implementation of `_.pick` without support for individual
+	       * property identifiers.
+	       *
+	       * @private
+	       * @param {Object} object The source object.
+	       * @param {string[]} paths The property paths to pick.
+	       * @returns {Object} Returns the new object.
+	       */
 
-	    return targetWay;
-	  }
 
-	  function updateChildren(updates, graph) {
-	    for (var i = 0; i < updates.replacements.length; i++) {
-	      graph = graph.replace(updates.replacements[i]);
-	    }
+	      function basePick(object, paths) {
+	        return basePickBy(object, paths, function (value, path) {
+	          return hasIn(object, path);
+	        });
+	      }
+	      /**
+	       * The base implementation of  `_.pickBy` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The source object.
+	       * @param {string[]} paths The property paths to pick.
+	       * @param {Function} predicate The function invoked per property.
+	       * @returns {Object} Returns the new object.
+	       */
 
-	    if (updates.removeIds.length) {
-	      graph = actionDeleteMultiple(updates.removeIds)(graph);
-	    }
 
-	    return graph;
-	  }
+	      function basePickBy(object, paths, predicate) {
+	        var index = -1,
+	            length = paths.length,
+	            result = {};
 
-	  function mergeMembers(remote, target) {
-	    if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-	      return target;
-	    }
+	        while (++index < length) {
+	          var path = paths[index],
+	              value = baseGet(object, path);
 
-	    if (_option === 'force_remote') {
-	      return target.update({
-	        members: remote.members
-	      });
-	    }
+	          if (predicate(value, path)) {
+	            baseSet(result, castPath(path, object), value);
+	          }
+	        }
 
-	    _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
-	      user: user(remote.user)
-	    }));
+	        return result;
+	      }
+	      /**
+	       * A specialized version of `baseProperty` which supports deep paths.
+	       *
+	       * @private
+	       * @param {Array|string} path The path of the property to get.
+	       * @returns {Function} Returns the new accessor function.
+	       */
 
-	    return target;
-	  }
 
-	  function mergeTags(base, remote, target) {
-	    if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-	      return target;
-	    }
+	      function basePropertyDeep(path) {
+	        return function (object) {
+	          return baseGet(object, path);
+	        };
+	      }
+	      /**
+	       * The base implementation of `_.pullAllBy` without support for iteratee
+	       * shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	    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
+	      function basePullAll(array, values, iteratee, comparator) {
+	        var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+	            index = -1,
+	            length = values.length,
+	            seen = array;
 
-	    var changed = false;
+	        if (array === values) {
+	          values = copyArray(values);
+	        }
 
-	    for (var i = 0; i < keys.length; i++) {
-	      var k = keys[i];
+	        if (iteratee) {
+	          seen = arrayMap(array, baseUnary(iteratee));
+	        }
 
-	      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];
-	          }
+	        while (++index < length) {
+	          var fromIndex = 0,
+	              value = values[index],
+	              computed = iteratee ? iteratee(value) : value;
 
-	          changed = true;
+	          while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+	            if (seen !== array) {
+	              splice.call(seen, fromIndex, 1);
+	            }
+
+	            splice.call(array, fromIndex, 1);
+	          }
 	        }
+
+	        return array;
 	      }
-	    }
+	      /**
+	       * The base implementation of `_.pullAt` without support for individual
+	       * indexes or capturing the removed elements.
+	       *
+	       * @private
+	       * @param {Array} array The array to modify.
+	       * @param {number[]} indexes The indexes of elements to remove.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	    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`
-	  //
 
+	      function basePullAt(array, indexes) {
+	        var length = array ? indexes.length : 0,
+	            lastIndex = length - 1;
 
-	  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
+	        while (length--) {
+	          var index = indexes[length];
 
-	    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);
+	          if (length == lastIndex || index !== previous) {
+	            var previous = index;
+
+	            if (isIndex(index)) {
+	              splice.call(array, index, 1);
+	            } else {
+	              baseUnset(array, index);
+	            }
+	          }
 	        }
 
-	        return graph.replace(target);
-	      } else {
-	        _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-	          user: user(remote.user)
-	        }));
+	        return array;
+	      }
+	      /**
+	       * The base implementation of `_.random` without support for returning
+	       * floating-point numbers.
+	       *
+	       * @private
+	       * @param {number} lower The lower bound.
+	       * @param {number} upper The upper bound.
+	       * @returns {number} Returns the random number.
+	       */
 
-	        return graph; // do nothing
+
+	      function baseRandom(lower, upper) {
+	        return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
 	      }
-	    } // merge
+	      /**
+	       * The base implementation of `_.range` and `_.rangeRight` which doesn't
+	       * coerce arguments.
+	       *
+	       * @private
+	       * @param {number} start The start of the range.
+	       * @param {number} end The end of the range.
+	       * @param {number} step The value to increment or decrement by.
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Array} Returns the range of numbers.
+	       */
 
 
-	    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);
-	    }
+	      function baseRange(start, end, step, fromRight) {
+	        var index = -1,
+	            length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+	            result = Array(length);
 
-	    target = mergeTags(base, remote, target);
+	        while (length--) {
+	          result[fromRight ? length : ++index] = start;
+	          start += step;
+	        }
 
-	    if (!_conflicts.length) {
-	      graph = updateChildren(updates, graph).replace(target);
-	    }
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.repeat` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {string} string The string to repeat.
+	       * @param {number} n The number of times to repeat the string.
+	       * @returns {string} Returns the repeated string.
+	       */
 
-	    return graph;
-	  };
 
-	  action.withOption = function (opt) {
-	    _option = opt;
-	    return action;
-	  };
+	      function baseRepeat(string, n) {
+	        var result = '';
 
-	  action.conflicts = function () {
-	    return _conflicts;
-	  };
+	        if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
+	          return result;
+	        } // Leverage the exponentiation by squaring algorithm for a faster repeat.
+	        // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
 
-	  return action;
-	}
 
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
+	        do {
+	          if (n % 2) {
+	            result += string;
+	          }
 
-	function actionMove(moveIDs, tryDelta, projection, cache) {
-	  var _delta = tryDelta;
+	          n = nativeFloor(n / 2);
 
-	  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..
+	          if (n) {
+	            string += string;
+	          }
+	        } while (n);
 
-	      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..
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+	       *
+	       * @private
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @param {number} [start=func.length-1] The start position of the rest parameter.
+	       * @returns {Function} Returns the new function.
+	       */
 
-	      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;
+	      function baseRest(func, start) {
+	        return setToString(overRest(func, start, identity), func + '');
+	      }
+	      /**
+	       * The base implementation of `_.sample`.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to sample.
+	       * @returns {*} Returns the random element.
+	       */
 
-	        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 baseSample(collection) {
+	        return arraySample(values(collection));
 	      }
-	    }
+	      /**
+	       * The base implementation of `_.sampleSize` without param guards.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to sample.
+	       * @param {number} n The number of elements to sample.
+	       * @returns {Array} Returns the random elements.
+	       */
 
-	    function cacheIntersections(ids) {
-	      function isEndpoint(way, id) {
-	        return !way.isClosed() && !!way.affix(id);
+
+	      function baseSampleSize(collection, n) {
+	        var array = values(collection);
+	        return shuffleSelf(array, baseClamp(n, 0, array.length));
 	      }
+	      /**
+	       * The base implementation of `_.set`.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {*} value The value to set.
+	       * @param {Function} [customizer] The function to customize path creation.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	      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));
+	      function baseSet(object, path, value, customizer) {
+	        if (!isObject(object)) {
+	          return object;
+	        }
 
-	        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;
+	        path = castPath(path, object);
+	        var index = -1,
+	            length = path.length,
+	            lastIndex = length - 1,
+	            nested = object;
 
-	          for (var k = 0; k < parents.length; k++) {
-	            var way = parents[k];
+	        while (nested != null && ++index < length) {
+	          var key = toKey(path[index]),
+	              newValue = value;
 
-	            if (!cache.moving[way.id]) {
-	              unmoved = way;
-	              break;
-	            }
+	          if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
+	            return object;
 	          }
 
-	          if (!unmoved) continue; // exclude ways that are overly connected..
+	          if (index != lastIndex) {
+	            var objValue = nested[key];
+	            newValue = customizer ? customizer(objValue, key, nested) : undefined$1;
 
-	          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 (newValue === undefined$1) {
+	              newValue = isObject(objValue) ? objValue : isIndex(path[index + 1]) ? [] : {};
+	            }
+	          }
+
+	          assignValue(nested, key, newValue);
+	          nested = nested[key];
 	        }
+
+	        return object;
 	      }
-	    }
+	      /**
+	       * The base implementation of `setData` without support for hot loop shorting.
+	       *
+	       * @private
+	       * @param {Function} func The function to associate metadata with.
+	       * @param {*} data The metadata.
+	       * @returns {Function} Returns `func`.
+	       */
 
-	    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
-	  //
-	  //
+	      var baseSetData = !metaMap ? identity : function (func, data) {
+	        metaMap.set(func, data);
+	        return func;
+	      };
+	      /**
+	       * The base implementation of `setToString` without support for hot loop shorting.
+	       *
+	       * @private
+	       * @param {Function} func The function to modify.
+	       * @param {Function} string The `toString` result.
+	       * @returns {Function} Returns `func`.
+	       */
 
+	      var baseSetToString = !defineProperty ? identity : function (func, string) {
+	        return defineProperty(func, 'toString', {
+	          'configurable': true,
+	          'enumerable': false,
+	          'value': constant(string),
+	          'writable': true
+	        });
+	      };
+	      /**
+	       * The base implementation of `_.shuffle`.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to shuffle.
+	       * @returns {Array} Returns the new shuffled array.
+	       */
 
-	  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;
+	      function baseShuffle(collection) {
+	        return shuffleSelf(values(collection));
+	      }
+	      /**
+	       * The base implementation of `_.slice` without an iteratee call guard.
+	       *
+	       * @private
+	       * @param {Array} array The array to slice.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns the slice of `array`.
+	       */
 
-	    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..
+	      function baseSlice(array, start, end) {
+	        var index = -1,
+	            length = array.length;
 
-	    if (!prev || !next) return graph;
-	    var key = wayId + '_' + nodeId;
-	    var orig = cache.replacedVertex[key];
+	        if (start < 0) {
+	          start = -start > length ? 0 : length + start;
+	        }
 
-	    if (!orig) {
-	      orig = osmNode();
-	      cache.replacedVertex[key] = orig;
-	      cache.startLoc[orig.id] = cache.startLoc[nodeId];
-	    }
+	        end = end > length ? length : end;
 
-	    var start, end;
+	        if (end < 0) {
+	          end += length;
+	        }
 
-	    if (delta) {
-	      start = projection(cache.startLoc[nodeId]);
-	      end = projection.invert(geoVecAdd(start, delta));
-	    } else {
-	      end = cache.startLoc[nodeId];
-	    }
+	        length = start > end ? 0 : end - start >>> 0;
+	        start >>>= 0;
+	        var result = Array(length);
 
-	    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..
+	        while (++index < length) {
+	          result[index] = array[index + start];
+	        }
 
-	    if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.some` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @returns {boolean} Returns `true` if any element passes the predicate check,
+	       *  else `false`.
+	       */
 
-	    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 baseSome(collection, predicate) {
+	        var result;
+	        baseEach(collection, function (value, index, collection) {
+	          result = predicate(value, index, collection);
+	          return !result;
+	        });
+	        return !!result;
+	      }
+	      /**
+	       * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
+	       * performs a binary search of `array` to determine the index at which `value`
+	       * should be inserted into `array` in order to maintain its sort order.
+	       *
+	       * @private
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {boolean} [retHighest] Specify returning the highest qualified index.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       */
 
 
-	  function removeDuplicateVertices(wayId, graph) {
-	    var way = graph.entity(wayId);
-	    var epsilon = 1e-6;
-	    var prev, curr;
+	      function baseSortedIndex(array, value, retHighest) {
+	        var low = 0,
+	            high = array == null ? low : array.length;
 
-	    function isInteresting(node, graph) {
-	      return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-	    }
+	        if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+	          while (low < high) {
+	            var mid = low + high >>> 1,
+	                computed = array[mid];
 
-	    for (var i = 0; i < way.nodes.length; i++) {
-	      curr = graph.entity(way.nodes[i]);
+	            if (computed !== null && !isSymbol(computed) && (retHighest ? computed <= value : computed < value)) {
+	              low = mid + 1;
+	            } else {
+	              high = mid;
+	            }
+	          }
 
-	      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);
+	          return high;
 	        }
-	      }
 
-	      prev = curr;
-	    }
+	        return baseSortedIndexBy(array, value, identity, retHighest);
+	      }
+	      /**
+	       * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+	       * which invokes `iteratee` for `value` and each element of `array` to compute
+	       * their sort ranking. The iteratee is invoked with one argument; (value).
+	       *
+	       * @private
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {Function} iteratee The iteratee invoked per element.
+	       * @param {boolean} [retHighest] Specify returning the highest qualified index.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       */
 
-	    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 baseSortedIndexBy(array, value, iteratee, retHighest) {
+	        var low = 0,
+	            high = array == null ? 0 : array.length;
 
-	  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 (high === 0) {
+	          return 0;
+	        }
 
-	    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)..
+	        value = iteratee(value);
+	        var valIsNaN = value !== value,
+	            valIsNull = value === null,
+	            valIsSymbol = isSymbol(value),
+	            valIsUndefined = value === undefined$1;
+
+	        while (low < high) {
+	          var mid = nativeFloor((low + high) / 2),
+	              computed = iteratee(array[mid]),
+	              othIsDefined = computed !== undefined$1,
+	              othIsNull = computed === null,
+	              othIsReflexive = computed === computed,
+	              othIsSymbol = isSymbol(computed);
+
+	          if (valIsNaN) {
+	            var setLow = retHighest || othIsReflexive;
+	          } else if (valIsUndefined) {
+	            setLow = othIsReflexive && (retHighest || othIsDefined);
+	          } else if (valIsNull) {
+	            setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+	          } else if (valIsSymbol) {
+	            setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+	          } else if (othIsNull || othIsSymbol) {
+	            setLow = false;
+	          } else {
+	            setLow = retHighest ? computed <= value : computed < value;
+	          }
 
-	    if (!isEP1 && !isEP2) {
-	      var epsilon = 1e-6,
-	          maxIter = 10;
+	          if (setLow) {
+	            low = mid + 1;
+	          } else {
+	            high = mid;
+	          }
+	        }
 
-	      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;
+	        return nativeMin(high, MAX_ARRAY_INDEX);
 	      }
-	    } else if (!isEP1) {
-	      loc = edge1.loc;
-	    } else {
-	      loc = edge2.loc;
-	    }
+	      /**
+	       * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
+	       * support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       */
 
-	    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);
-	    }
+	      function baseSortedUniq(array, iteratee) {
+	        var index = -1,
+	            length = array.length,
+	            resIndex = 0,
+	            result = [];
 
-	    if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-	      way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-	      graph = graph.replace(way2);
-	    }
+	        while (++index < length) {
+	          var value = array[index],
+	              computed = iteratee ? iteratee(value) : value;
 
-	    return graph;
-	  }
+	          if (!index || !eq(computed, seen)) {
+	            var seen = computed;
+	            result[resIndex++] = value === 0 ? 0 : value;
+	          }
+	        }
 
-	  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 result;
+	      }
+	      /**
+	       * The base implementation of `_.toNumber` which doesn't ensure correct
+	       * conversions of binary, hexadecimal, or octal string values.
+	       *
+	       * @private
+	       * @param {*} value The value to process.
+	       * @returns {number} Returns the number.
+	       */
 
-	    return graph;
-	  } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
+	      function baseToNumber(value) {
+	        if (typeof value == 'number') {
+	          return value;
+	        }
 
-	  function limitDelta(graph) {
-	    function moveNode(loc) {
-	      return geoVecAdd(projection(loc), _delta);
-	    }
+	        if (isSymbol(value)) {
+	          return NAN;
+	        }
 
-	    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..
+	        return +value;
+	      }
+	      /**
+	       * The base implementation of `_.toString` which doesn't convert nullish
+	       * values to empty strings.
+	       *
+	       * @private
+	       * @param {*} value The value to process.
+	       * @returns {string} Returns the string.
+	       */
 
-	      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);
+	      function baseToString(value) {
+	        // Exit early for strings to avoid a performance hit in some environments.
+	        if (typeof value == 'string') {
+	          return value;
+	        }
 
-	      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);
-	      }
-	    }
-	  }
+	        if (isArray(value)) {
+	          // Recursively convert values (susceptible to call stack limits).
+	          return arrayMap(value, baseToString) + '';
+	        }
 
-	  var action = function action(graph) {
-	    if (_delta[0] === 0 && _delta[1] === 0) return graph;
-	    setupCache(graph);
+	        if (isSymbol(value)) {
+	          return symbolToString ? symbolToString.call(value) : '';
+	        }
 
-	    if (cache.intersections.length) {
-	      limitDelta(graph);
-	    }
+	        var result = value + '';
+	        return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+	      }
+	      /**
+	       * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       */
 
-	    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);
-	    }
+	      function baseUniq(array, iteratee, comparator) {
+	        var index = -1,
+	            includes = arrayIncludes,
+	            length = array.length,
+	            isCommon = true,
+	            result = [],
+	            seen = result;
 
-	    return graph;
-	  };
+	        if (comparator) {
+	          isCommon = false;
+	          includes = arrayIncludesWith;
+	        } else if (length >= LARGE_ARRAY_SIZE) {
+	          var set = iteratee ? null : createSet(array);
 
-	  action.delta = function () {
-	    return _delta;
-	  };
+	          if (set) {
+	            return setToArray(set);
+	          }
 
-	  return action;
-	}
+	          isCommon = false;
+	          includes = cacheHas;
+	          seen = new SetCache();
+	        } else {
+	          seen = iteratee ? [] : result;
+	        }
 
-	function actionMoveMember(relationId, fromIndex, toIndex) {
-	  return function (graph) {
-	    return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-	  };
-	}
+	        outer: while (++index < length) {
+	          var value = array[index],
+	              computed = iteratee ? iteratee(value) : value;
+	          value = comparator || value !== 0 ? value : 0;
 
-	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)));
-	  };
+	          if (isCommon && computed === computed) {
+	            var seenIndex = seen.length;
 
-	  action.transitionable = true;
-	  return action;
-	}
+	            while (seenIndex--) {
+	              if (seen[seenIndex] === computed) {
+	                continue outer;
+	              }
+	            }
 
-	function actionNoop() {
-	  return function (graph) {
-	    return graph;
-	  };
-	}
+	            if (iteratee) {
+	              seen.push(computed);
+	            }
 
-	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)
+	            result.push(value);
+	          } else if (!includes(seen, computed, comparator)) {
+	            if (seen !== result) {
+	              seen.push(computed);
+	            }
 
-	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	            result.push(value);
+	          }
+	        }
 
-	  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
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.unset`.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The property path to unset.
+	       * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+	       */
 
-	    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
-	      });
-	    }
+	      function baseUnset(object, path) {
+	        path = castPath(path, object);
+	        object = parent(object, path);
+	        return object == null || delete object[toKey(last(path))];
+	      }
+	      /**
+	       * The base implementation of `_.update`.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to update.
+	       * @param {Function} updater The function to produce the updated value.
+	       * @param {Function} [customizer] The function to customize path creation.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	    graph = graph.replace(way);
-	    var isClosed = way.isClosed();
-	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	    if (isClosed) nodes.pop();
+	      function baseUpdate(object, path, updater, customizer) {
+	        return baseSet(object, path, updater(baseGet(object, path)), customizer);
+	      }
+	      /**
+	       * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
+	       * without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to query.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Array} Returns the slice of `array`.
+	       */
 
-	    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
 
+	      function baseWhile(array, predicate, isDrop, fromRight) {
+	        var length = array.length,
+	            index = fromRight ? length : -1;
 
-	    var nodeCount = {};
-	    var points = [];
-	    var corner = {
-	      i: 0,
-	      dotp: 1
-	    };
-	    var node, point, loc, score, motions, i, j;
+	        while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {}
 
-	    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)
-	      });
-	    }
+	        return isDrop ? baseSlice(array, fromRight ? 0 : index, fromRight ? index + 1 : length) : baseSlice(array, fromRight ? index + 1 : 0, fromRight ? length : index);
+	      }
+	      /**
+	       * The base implementation of `wrapperValue` which returns the result of
+	       * performing a sequence of actions on the unwrapped `value`, where each
+	       * successive action is supplied the return value of the previous.
+	       *
+	       * @private
+	       * @param {*} value The unwrapped value.
+	       * @param {Array} actions Actions to perform to resolve the unwrapped value.
+	       * @returns {*} Returns the resolved value.
+	       */
 
-	    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 baseWrapperValue(value, actions) {
+	        var result = value;
+
+	        if (result instanceof LazyWrapper) {
+	          result = result.value();
 	        }
+
+	        return arrayReduce(actions, function (result, action) {
+	          return action.func.apply(action.thisArg, arrayPush([result], action.args));
+	        }, result);
 	      }
+	      /**
+	       * The base implementation of methods like `_.xor`, without support for
+	       * iteratee shorthands, that accepts an array of arrays to inspect.
+	       *
+	       * @private
+	       * @param {Array} arrays The arrays to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of values.
+	       */
 
-	      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
 
-	      for (i = 0; i < points.length; i++) {
-	        point = points[i];
-	        var dotp = 0;
+	      function baseXor(arrays, iteratee, comparator) {
+	        var length = arrays.length;
 
-	        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 (length < 2) {
+	          return length ? baseUniq(arrays[0]) : [];
 	        }
 
-	        if (dotp > upperThreshold) {
-	          straights.push(point);
-	        } else {
-	          simplified.push(point);
+	        var index = -1,
+	            result = Array(length);
+
+	        while (++index < length) {
+	          var array = arrays[index],
+	              othIndex = -1;
+
+	          while (++othIndex < length) {
+	            if (othIndex != index) {
+	              result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+	            }
+	          }
 	        }
-	      } // Orthogonalize the simplified shape
 
+	        return baseUniq(baseFlatten(result, 1), iteratee, comparator);
+	      }
+	      /**
+	       * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
+	       *
+	       * @private
+	       * @param {Array} props The property identifiers.
+	       * @param {Array} values The property values.
+	       * @param {Function} assignFunc The function to assign values.
+	       * @returns {Object} Returns the new object.
+	       */
 
-	      var bestPoints = clonePoints(simplified);
-	      var originalPoints = clonePoints(simplified);
-	      score = Infinity;
 
-	      for (i = 0; i < 1000; i++) {
-	        motions = simplified.map(calcMotion);
+	      function baseZipObject(props, values, assignFunc) {
+	        var index = -1,
+	            length = props.length,
+	            valsLength = values.length,
+	            result = {};
 
-	        for (j = 0; j < motions.length; j++) {
-	          simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
+	        while (++index < length) {
+	          var value = index < valsLength ? values[index] : undefined$1;
+	          assignFunc(result, props[index], value);
 	        }
 
-	        var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
+	        return result;
+	      }
+	      /**
+	       * Casts `value` to an empty array if it's not an array like object.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @returns {Array|Object} Returns the cast array-like object.
+	       */
 
-	        if (newScore < score) {
-	          bestPoints = clonePoints(simplified);
-	          score = newScore;
-	        }
 
-	        if (score < epsilon) {
-	          break;
+	      function castArrayLikeObject(value) {
+	        return isArrayLikeObject(value) ? value : [];
+	      }
+	      /**
+	       * Casts `value` to `identity` if it's not a function.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @returns {Function} Returns cast function.
+	       */
+
+
+	      function castFunction(value) {
+	        return typeof value == 'function' ? value : identity;
+	      }
+	      /**
+	       * Casts `value` to a path array if it's not one.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @param {Object} [object] The object to query keys on.
+	       * @returns {Array} Returns the cast property path array.
+	       */
+
+
+	      function castPath(value, object) {
+	        if (isArray(value)) {
+	          return value;
 	        }
-	      }
 
-	      var bestCoords = bestPoints.map(function (p) {
-	        return p.coord;
-	      });
-	      if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
+	        return isKey(value, object) ? [value] : stringToPath(toString(value));
+	      }
+	      /**
+	       * A `baseRest` alias which can be replaced with `identity` by module
+	       * replacement plugins.
+	       *
+	       * @private
+	       * @type {Function}
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @returns {Function} Returns the new function.
+	       */
 
-	      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)));
-	        }
-	      } // move the nodes along straight segments
+	      var castRest = baseRest;
+	      /**
+	       * Casts `array` to a slice if it's needed.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {number} start The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns the cast slice.
+	       */
 
+	      function castSlice(array, start, end) {
+	        var length = array.length;
+	        end = end === undefined$1 ? length : end;
+	        return !start && end >= length ? array : baseSlice(array, start, end);
+	      }
+	      /**
+	       * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
+	       *
+	       * @private
+	       * @param {number|Object} id The timer id or timeout object of the timer to clear.
+	       */
 
-	      for (i = 0; i < straights.length; i++) {
-	        point = straights[i];
-	        if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-	        node = graph.entity(point.id);
+	      var clearTimeout = ctxClearTimeout || function (id) {
+	        return root.clearTimeout(id);
+	      };
+	      /**
+	       * Creates a clone of  `buffer`.
+	       *
+	       * @private
+	       * @param {Buffer} buffer The buffer to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Buffer} Returns the cloned buffer.
+	       */
 
-	        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);
 
-	          if (choice) {
-	            loc = projection.invert(choice.target);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	          }
+	      function cloneBuffer(buffer, isDeep) {
+	        if (isDeep) {
+	          return buffer.slice();
 	        }
+
+	        var length = buffer.length,
+	            result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+	        buffer.copy(result);
+	        return result;
 	      }
-	    }
+	      /**
+	       * Creates a clone of `arrayBuffer`.
+	       *
+	       * @private
+	       * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+	       * @returns {ArrayBuffer} Returns the cloned array buffer.
+	       */
 
-	    return graph;
 
-	    function clonePoints(array) {
-	      return array.map(function (p) {
-	        return {
-	          id: p.id,
-	          coord: [p.coord[0], p.coord[1]]
-	        };
-	      });
-	    }
+	      function cloneArrayBuffer(arrayBuffer) {
+	        var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+	        new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+	        return result;
+	      }
+	      /**
+	       * Creates a clone of `dataView`.
+	       *
+	       * @private
+	       * @param {Object} dataView The data view to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Object} Returns the cloned data view.
+	       */
 
-	    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);
+	      function cloneDataView(dataView, isDeep) {
+	        var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+	        return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+	      }
+	      /**
+	       * Creates a clone of `regexp`.
+	       *
+	       * @private
+	       * @param {Object} regexp The regexp to clone.
+	       * @returns {Object} Returns the cloned regexp.
+	       */
 
-	      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 cloneRegExp(regexp) {
+	        var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+	        result.lastIndex = regexp.lastIndex;
+	        return result;
 	      }
+	      /**
+	       * Creates a clone of the `symbol` object.
+	       *
+	       * @private
+	       * @param {Object} symbol The symbol object to clone.
+	       * @returns {Object} Returns the cloned symbol object.
+	       */
 
-	      return [0, 0]; // do nothing
-	    }
-	  }; // if we are only orthogonalizing one vertex,
-	  // get that vertex and the previous and next
 
+	      function cloneSymbol(symbol) {
+	        return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+	      }
+	      /**
+	       * Creates a clone of `typedArray`.
+	       *
+	       * @private
+	       * @param {Object} typedArray The typed array to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Object} Returns the cloned typed array.
+	       */
 
-	  function nodeSubset(nodes, vertexID, isClosed) {
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? nodes.length : nodes.length - 1;
 
-	    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]];
+	      function cloneTypedArray(typedArray, isDeep) {
+	        var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+	        return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
 	      }
-	    }
+	      /**
+	       * Compares values to sort them in ascending order.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {number} Returns the sort order indicator for `value`.
+	       */
 
-	    return [];
-	  }
 
-	  action.disabled = function (graph) {
-	    var way = graph.entity(wayID);
-	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
+	      function compareAscending(value, other) {
+	        if (value !== other) {
+	          var valIsDefined = value !== undefined$1,
+	              valIsNull = value === null,
+	              valIsReflexive = value === value,
+	              valIsSymbol = isSymbol(value);
+	          var othIsDefined = other !== undefined$1,
+	              othIsNull = other === null,
+	              othIsReflexive = other === other,
+	              othIsSymbol = isSymbol(other);
 
-	    graph = graph.replace(way);
-	    var isClosed = way.isClosed();
-	    var nodes = graph.childNodes(way).slice(); // shallow copy
+	          if (!othIsNull && !othIsSymbol && !valIsSymbol && value > other || valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol || valIsNull && othIsDefined && othIsReflexive || !valIsDefined && othIsReflexive || !valIsReflexive) {
+	            return 1;
+	          }
 
-	    if (isClosed) nodes.pop();
-	    var allowStraightAngles = false;
+	          if (!valIsNull && !valIsSymbol && !othIsSymbol && value < other || othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol || othIsNull && valIsDefined && valIsReflexive || !othIsDefined && valIsReflexive || !othIsReflexive) {
+	            return -1;
+	          }
+	        }
 
-	    if (vertexID !== undefined) {
-	      allowStraightAngles = true;
-	      nodes = nodeSubset(nodes, vertexID, isClosed);
-	      if (nodes.length !== 3) return 'end_vertex';
-	    }
+	        return 0;
+	      }
+	      /**
+	       * Used by `_.orderBy` to compare multiple properties of a value to another
+	       * and stable sort them.
+	       *
+	       * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
+	       * specify an order of "desc" for descending or "asc" for ascending sort order
+	       * of corresponding values.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {boolean[]|string[]} orders The order to sort by for each property.
+	       * @returns {number} Returns the sort order indicator for `object`.
+	       */
 
-	    var coords = nodes.map(function (n) {
-	      return projection(n.loc);
-	    });
-	    var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
-	    if (score === null) {
-	      return 'not_squarish';
-	    } else if (score === 0) {
-	      return 'square_enough';
-	    } else {
-	      return false;
-	    }
-	  };
+	      function compareMultiple(object, other, orders) {
+	        var index = -1,
+	            objCriteria = object.criteria,
+	            othCriteria = other.criteria,
+	            length = objCriteria.length,
+	            ordersLength = orders.length;
 
-	  action.transitionable = true;
-	  return action;
-	}
+	        while (++index < length) {
+	          var result = compareAscending(objCriteria[index], othCriteria[index]);
 
-	//
-	// `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.
-	//
+	          if (result) {
+	            if (index >= ordersLength) {
+	              return result;
+	            }
 
-	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'
-	    });
+	            var order = orders[index];
+	            return result * (order == 'desc' ? -1 : 1);
+	          }
+	        } // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+	        // that causes it, under certain circumstances, to provide the same value for
+	        // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
+	        // for more details.
+	        //
+	        // This also ensures a stable sort in V8 and other engines.
+	        // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
 
-	    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'
-	        });
-	      });
-	    }
 
-	    members.push({
-	      id: toWay.id,
-	      type: 'way',
-	      role: 'to'
-	    });
-	    return graph.replace(osmRelation({
-	      id: restrictionID,
-	      tags: {
-	        type: 'restriction',
-	        restriction: restrictionType
-	      },
-	      members: members
-	    }));
-	  };
-	}
+	        return object.index - other.index;
+	      }
+	      /**
+	       * Creates an array that is the composition of partially applied arguments,
+	       * placeholders, and provided arguments into a single array of arguments.
+	       *
+	       * @private
+	       * @param {Array} args The provided arguments.
+	       * @param {Array} partials The arguments to prepend to those provided.
+	       * @param {Array} holders The `partials` placeholder indexes.
+	       * @params {boolean} [isCurried] Specify composing for a curried function.
+	       * @returns {Array} Returns the new array of composed arguments.
+	       */
 
-	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);
+	      function composeArgs(args, partials, holders, isCurried) {
+	        var argsIndex = -1,
+	            argsLength = args.length,
+	            holdersLength = holders.length,
+	            leftIndex = -1,
+	            leftLength = partials.length,
+	            rangeLength = nativeMax(argsLength - holdersLength, 0),
+	            result = Array(leftLength + rangeLength),
+	            isUncurried = !isCurried;
 
-	          if (parent.isDegenerate()) {
-	            graph = actionDeleteWay(parent.id)(graph);
+	        while (++leftIndex < leftLength) {
+	          result[leftIndex] = partials[leftIndex];
+	        }
+
+	        while (++argsIndex < holdersLength) {
+	          if (isUncurried || argsIndex < argsLength) {
+	            result[holders[argsIndex]] = args[argsIndex];
 	          }
-	        });
+	        }
+
+	        while (rangeLength--) {
+	          result[leftIndex++] = args[argsIndex++];
+	        }
+
+	        return result;
 	      }
+	      /**
+	       * This function is like `composeArgs` except that the arguments composition
+	       * is tailored for `_.partialRight`.
+	       *
+	       * @private
+	       * @param {Array} args The provided arguments.
+	       * @param {Array} partials The arguments to append to those provided.
+	       * @param {Array} holders The `partials` placeholder indexes.
+	       * @params {boolean} [isCurried] Specify composing for a curried function.
+	       * @returns {Array} Returns the new array of composed arguments.
+	       */
 
-	      graph.parentRelations(entity).forEach(function (parent) {
-	        parent = parent.removeMembersWithID(id);
-	        graph = graph.replace(parent);
 
-	        if (parent.isDegenerate()) {
-	          graph = actionDeleteRelation(parent.id)(graph);
+	      function composeArgsRight(args, partials, holders, isCurried) {
+	        var argsIndex = -1,
+	            argsLength = args.length,
+	            holdersIndex = -1,
+	            holdersLength = holders.length,
+	            rightIndex = -1,
+	            rightLength = partials.length,
+	            rangeLength = nativeMax(argsLength - holdersLength, 0),
+	            result = Array(rangeLength + rightLength),
+	            isUncurried = !isCurried;
+
+	        while (++argsIndex < rangeLength) {
+	          result[argsIndex] = args[argsIndex];
 	        }
-	      });
-	    }
 
-	    return graph.revert(id);
-	  };
+	        var offset = argsIndex;
 
-	  return action;
-	}
+	        while (++rightIndex < rightLength) {
+	          result[offset + rightIndex] = partials[rightIndex];
+	        }
 
-	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)));
-	      });
-	    });
-	  };
+	        while (++holdersIndex < holdersLength) {
+	          if (isUncurried || argsIndex < argsLength) {
+	            result[offset + holders[holdersIndex]] = args[argsIndex++];
+	          }
+	        }
 
-	  return action;
-	}
+	        return result;
+	      }
+	      /**
+	       * Copies the values of `source` to `array`.
+	       *
+	       * @private
+	       * @param {Array} source The array to copy values from.
+	       * @param {Array} [array=[]] The array to copy values to.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	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)));
-	      });
-	    });
-	  };
-	}
 
-	/* Align nodes along their common axis */
+	      function copyArray(source, array) {
+	        var index = -1,
+	            length = source.length;
+	        array || (array = Array(length));
 
-	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
+	        while (++index < length) {
+	          array[index] = source[index];
+	        }
 
+	        return array;
+	      }
+	      /**
+	       * Copies properties of `source` to `object`.
+	       *
+	       * @private
+	       * @param {Object} source The object to copy properties from.
+	       * @param {Array} props The property identifiers to copy.
+	       * @param {Object} [object={}] The object to copy properties to.
+	       * @param {Function} [customizer] The function to customize copied values.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	  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];
-	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+	      function copyObject(source, props, object, customizer) {
+	        var isNew = !object;
+	        object || (object = {});
+	        var index = -1,
+	            length = props.length;
 
-	    if (isLong) {
-	      return [p1, q1];
-	    }
+	        while (++index < length) {
+	          var key = props[index];
+	          var newValue = customizer ? customizer(object[key], source[key], key, object, source) : undefined$1;
 
-	    return [p2, q2];
-	  }
+	          if (newValue === undefined$1) {
+	            newValue = source[key];
+	          }
 
-	  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 (isNew) {
+	            baseAssignValue(object, key, newValue);
+	          } else {
+	            assignValue(object, key, newValue);
+	          }
+	        }
 
-	    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 object;
+	      }
+	      /**
+	       * Copies own symbols of `source` to `object`.
+	       *
+	       * @private
+	       * @param {Object} source The object to copy symbols from.
+	       * @param {Object} [object={}] The object to copy symbols to.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	    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;
+	      function copySymbols(source, object) {
+	        return copyObject(source, getSymbols(source), object);
+	      }
+	      /**
+	       * Copies own and inherited symbols of `source` to `object`.
+	       *
+	       * @private
+	       * @param {Object} source The object to copy symbols from.
+	       * @param {Object} [object={}] The object to copy symbols to.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	    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;
+	      function copySymbolsIn(source, object) {
+	        return copyObject(source, getSymbolsIn(source), object);
 	      }
-	    }
+	      /**
+	       * Creates a function like `_.groupBy`.
+	       *
+	       * @private
+	       * @param {Function} setter The function to set accumulator values.
+	       * @param {Function} [initializer] The accumulator object initializer.
+	       * @returns {Function} Returns the new aggregator function.
+	       */
 
-	    if (maxDistance < 0.0001) {
-	      return 'straight_enough';
-	    }
-	  };
 
-	  action.transitionable = true;
-	  return action;
-	}
+	      function createAggregator(setter, initializer) {
+	        return function (collection, iteratee) {
+	          var func = isArray(collection) ? arrayAggregator : baseAggregator,
+	              accumulator = initializer ? initializer() : {};
+	          return func(collection, setter, getIteratee(iteratee, 2), accumulator);
+	        };
+	      }
+	      /**
+	       * Creates a function like `_.assign`.
+	       *
+	       * @private
+	       * @param {Function} assigner The function to assign values.
+	       * @returns {Function} Returns the new assigner function.
+	       */
 
-	/*
-	 * 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 createAssigner(assigner) {
+	        return baseRest(function (object, sources) {
+	          var index = -1,
+	              length = sources.length,
+	              customizer = length > 1 ? sources[length - 1] : undefined$1,
+	              guard = length > 2 ? sources[2] : undefined$1;
+	          customizer = assigner.length > 3 && typeof customizer == 'function' ? (length--, customizer) : undefined$1;
 
+	          if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+	            customizer = length < 3 ? undefined$1 : customizer;
+	            length = 1;
+	          }
 
-	  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';
-	    });
+	          object = Object(object);
 
-	    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"]
+	          while (++index < length) {
+	            var source = sources[index];
 
+	            if (source) {
+	              assigner(object, source, index, customizer);
+	            }
+	          }
 
-	    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 object;
+	        });
+	      }
+	      /**
+	       * Creates a `baseEach` or `baseEachRight` function.
+	       *
+	       * @private
+	       * @param {Function} eachFunc The function to iterate over a collection.
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new base function.
+	       */
 
-	    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 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 createBaseEach(eachFunc, fromRight) {
+	        return function (collection, iteratee) {
+	          if (collection == null) {
+	            return collection;
+	          }
 
+	          if (!isArrayLike(collection)) {
+	            return eachFunc(collection, iteratee);
+	          }
 
-	    while (remainingWays.length) {
-	      nextWay = getNextWay(currNode, remainingWays);
-	      remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+	          var length = collection.length,
+	              index = fromRight ? length : -1,
+	              iterable = Object(collection);
 
-	      if (nextWay[0] !== currNode) {
-	        nextWay.reverse();
+	          while (fromRight ? index-- : ++index < length) {
+	            if (iteratee(iterable[index], index, iterable) === false) {
+	              break;
+	            }
+	          }
+
+	          return collection;
+	        };
 	      }
+	      /**
+	       * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+	       *
+	       * @private
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new base function.
+	       */
 
-	      nodes = nodes.concat(nextWay);
-	      currNode = nodes[nodes.length - 1];
-	    } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
 
+	      function createBaseFor(fromRight) {
+	        return function (object, iteratee, keysFunc) {
+	          var index = -1,
+	              iterable = Object(object),
+	              props = keysFunc(object),
+	              length = props.length;
 
-	    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);
-	    }
+	          while (length--) {
+	            var key = props[fromRight ? length : ++index];
 
-	    return nodes.map(function (n) {
-	      return graph.entity(n);
-	    });
-	  }
+	            if (iteratee(iterable[key], key, iterable) === false) {
+	              break;
+	            }
+	          }
 
-	  function shouldKeepNode(node, graph) {
-	    return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-	  }
+	          return object;
+	        };
+	      }
+	      /**
+	       * Creates a function that wraps `func` to invoke it with the optional `this`
+	       * binding of `thisArg`.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	  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];
+	      function createBind(func, bitmask, thisArg) {
+	        var isBind = bitmask & WRAP_BIND_FLAG,
+	            Ctor = createCtor(func);
 
-	      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);
+	        function wrapper() {
+	          var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+	          return fn.apply(isBind ? thisArg : this, arguments);
 	        }
+
+	        return wrapper;
 	      }
-	    }
+	      /**
+	       * Creates a function like `_.lowerFirst`.
+	       *
+	       * @private
+	       * @param {string} methodName The name of the `String` case method to use.
+	       * @returns {Function} Returns the new case function.
+	       */
 
-	    for (i = 0; i < toDelete.length; i++) {
-	      graph = actionDeleteNode(toDelete[i].id)(graph);
-	    }
 
-	    return graph;
-	  };
+	      function createCaseFirst(methodName) {
+	        return function (string) {
+	          string = toString(string);
+	          var strSymbols = hasUnicode(string) ? stringToArray(string) : undefined$1;
+	          var chr = strSymbols ? strSymbols[0] : string.charAt(0);
+	          var trailing = strSymbols ? castSlice(strSymbols, 1).join('') : string.slice(1);
+	          return chr[methodName]() + trailing;
+	        };
+	      }
+	      /**
+	       * Creates a function like `_.camelCase`.
+	       *
+	       * @private
+	       * @param {Function} callback The function to combine each word.
+	       * @returns {Function} Returns the new compounder function.
+	       */
 
-	  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 (threshold === 0) {
-	      return 'too_bendy';
-	    }
+	      function createCompounder(callback) {
+	        return function (string) {
+	          return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
+	        };
+	      }
+	      /**
+	       * Creates a function that produces an instance of `Ctor` regardless of
+	       * whether it was invoked as part of a `new` expression or by `call` or `apply`.
+	       *
+	       * @private
+	       * @param {Function} Ctor The constructor to wrap.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	    var maxDistance = 0;
 
-	    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 createCtor(Ctor) {
+	        return function () {
+	          // Use a `switch` statement to work with class constructors. See
+	          // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+	          // for more details.
+	          var args = arguments;
 
-	      if (isNaN(dist) || dist > threshold) {
-	        return 'too_bendy';
-	      } else if (dist > maxDistance) {
-	        maxDistance = dist;
-	      }
-	    }
+	          switch (args.length) {
+	            case 0:
+	              return new Ctor();
 
-	    var keepingAllNodes = nodes.every(function (node, i) {
-	      return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-	    });
+	            case 1:
+	              return new Ctor(args[0]);
 
-	    if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
-	    keepingAllNodes) {
-	      return 'straight_enough';
-	    }
-	  };
+	            case 2:
+	              return new Ctor(args[0], args[1]);
 
-	  action.transitionable = true;
-	  return action;
-	}
+	            case 3:
+	              return new Ctor(args[0], args[1], args[2]);
 
-	//
-	// `turn` must be an `osmTurn` object with a `restrictionID` property.
-	// see osm/intersection.js, pathToTurn()
-	//
+	            case 4:
+	              return new Ctor(args[0], args[1], args[2], args[3]);
 
-	function actionUnrestrictTurn(turn) {
-	  return function (graph) {
-	    return actionDeleteRelation(turn.restrictionID)(graph);
-	  };
-	}
+	            case 5:
+	              return new Ctor(args[0], args[1], args[2], args[3], args[4]);
 
-	/* Reflect the given area around its axis of symmetry */
+	            case 6:
+	              return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
 
-	function actionReflect(reflectIds, projection) {
-	  var _useLongAxis = true;
+	            case 7:
+	              return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
+	          }
 
-	  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 thisBinding = baseCreate(Ctor.prototype),
+	              result = Ctor.apply(thisBinding, args); // Mimic the constructor's `return` behavior.
+	          // See https://es5.github.io/#x13.2.2 for more details.
 
-	    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);
+	          return isObject(result) ? result : thisBinding;
+	        };
+	      }
+	      /**
+	       * Creates a function that wraps `func` to enable currying.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {number} arity The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	    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
 
+	      function createCurry(func, bitmask, arity) {
+	        var Ctor = createCtor(func);
 
-	    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);
+	        function wrapper() {
+	          var length = arguments.length,
+	              args = Array(length),
+	              index = length,
+	              placeholder = getHolder(wrapper);
 
-	    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);
-	    }
+	          while (index--) {
+	            args[index] = arguments[index];
+	          }
 
-	    return graph;
-	  };
+	          var holders = length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder ? [] : replaceHolders(args, placeholder);
+	          length -= holders.length;
 
-	  action.useLongAxis = function (val) {
-	    if (!arguments.length) return _useLongAxis;
-	    _useLongAxis = val;
-	    return action;
-	  };
+	          if (length < arity) {
+	            return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, undefined$1, args, holders, undefined$1, undefined$1, arity - length);
+	          }
 
-	  action.transitionable = true;
-	  return action;
-	}
+	          var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+	          return apply(fn, this, args);
+	        }
 
-	function actionUpgradeTags(entityId, oldTags, replaceTags) {
-	  return function (graph) {
-	    var entity = graph.entity(entityId);
-	    var tags = Object.assign({}, entity.tags); // shallow copy
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a `_.find` or `_.findLast` function.
+	       *
+	       * @private
+	       * @param {Function} findIndexFunc The function to find the collection index.
+	       * @returns {Function} Returns the new find function.
+	       */
 
-	    var transferValue;
-	    var semiIndex;
 
-	    for (var oldTagKey in oldTags) {
-	      if (!(oldTagKey in tags)) continue; // wildcard match
+	      function createFind(findIndexFunc) {
+	        return function (collection, predicate, fromIndex) {
+	          var iterable = Object(collection);
 
-	      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]);
+	          if (!isArrayLike(collection)) {
+	            var iteratee = getIteratee(predicate, 3);
+	            collection = keys(collection);
 
-	        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;
+	            predicate = function predicate(key) {
+	              return iteratee(iterable[key], key, iterable);
+	            };
 	          }
 
-	          vals.splice(oldIndex, 1);
-	          tags[oldTagKey] = vals.join(';');
-	        }
+	          var index = findIndexFunc(collection, predicate, fromIndex);
+	          return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined$1;
+	        };
 	      }
-	    }
+	      /**
+	       * Creates a `_.flow` or `_.flowRight` function.
+	       *
+	       * @private
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new flow function.
+	       */
 
-	    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';
+	      function createFlow(fromRight) {
+	        return flatRest(function (funcs) {
+	          var length = funcs.length,
+	              index = length,
+	              prereq = LodashWrapper.prototype.thru;
+
+	          if (fromRight) {
+	            funcs.reverse();
 	          }
-	        } 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(';');
+	          while (index--) {
+	            var func = funcs[index];
+
+	            if (typeof func != 'function') {
+	              throw new TypeError(FUNC_ERROR_TEXT);
+	            }
+
+	            if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
+	              var wrapper = new LodashWrapper([], true);
 	            }
-	          } else {
-	            tags[replaceKey] = replaceValue;
 	          }
-	        }
-	      }
-	    }
 
-	    return graph.replace(entity.update({
-	      tags: tags
-	    }));
-	  };
-	}
+	          index = wrapper ? index : length;
 
-	function behaviorEdit(context) {
-	  function behavior() {
-	    context.map().minzoom(context.minEditableZoom());
-	  }
+	          while (++index < length) {
+	            func = funcs[index];
+	            var funcName = getFuncName(func),
+	                data = funcName == 'wrapper' ? getData(func) : undefined$1;
 
-	  behavior.off = function () {
-	    context.map().minzoom(0);
-	  };
+	            if (data && isLaziable(data[0]) && data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) && !data[4].length && data[9] == 1) {
+	              wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
+	            } else {
+	              wrapper = func.length == 1 && isLaziable(func) ? wrapper[funcName]() : wrapper.thru(func);
+	            }
+	          }
 
-	  return behavior;
-	}
+	          return function () {
+	            var args = arguments,
+	                value = args[0];
 
-	/*
-	   The hover behavior adds the `.hover` class on pointerover to all elements to which
-	   the identical datum is bound, and removes it on pointerout.
+	            if (wrapper && args.length == 1 && isArray(value)) {
+	              return wrapper.plant(value).value();
+	            }
 
-	   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.
-	 */
+	            var index = 0,
+	                result = length ? funcs[index].apply(this, args) : value;
 
-	function behaviorHover(context) {
-	  var dispatch$1 = dispatch('hover');
+	            while (++index < length) {
+	              result = funcs[index].call(this, result);
+	            }
 
-	  var _selection = select(null);
+	            return result;
+	          };
+	        });
+	      }
+	      /**
+	       * Creates a function that wraps `func` to invoke it with optional `this`
+	       * binding of `thisArg`, partial application, and currying.
+	       *
+	       * @private
+	       * @param {Function|string} func The function or method name to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @param {Array} [partials] The arguments to prepend to those provided to
+	       *  the new function.
+	       * @param {Array} [holders] The `partials` placeholder indexes.
+	       * @param {Array} [partialsRight] The arguments to append to those provided
+	       *  to the new function.
+	       * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
+	       * @param {Array} [argPos] The argument positions of the new function.
+	       * @param {number} [ary] The arity cap of `func`.
+	       * @param {number} [arity] The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	  var _newNodeId = null;
-	  var _initialNodeID = null;
 
-	  var _altDisables;
+	      function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+	        var isAry = bitmask & WRAP_ARY_FLAG,
+	            isBind = bitmask & WRAP_BIND_FLAG,
+	            isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
+	            isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
+	            isFlip = bitmask & WRAP_FLIP_FLAG,
+	            Ctor = isBindKey ? undefined$1 : createCtor(func);
 
-	  var _ignoreVertex;
+	        function wrapper() {
+	          var length = arguments.length,
+	              args = Array(length),
+	              index = length;
 
-	  var _targets = []; // use pointer events on supported platforms; fallback to mouse events
+	          while (index--) {
+	            args[index] = arguments[index];
+	          }
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	          if (isCurried) {
+	            var placeholder = getHolder(wrapper),
+	                holdersCount = countHolders(args, placeholder);
+	          }
 
-	  function keydown(d3_event) {
-	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-	      _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
+	          if (partials) {
+	            args = composeArgs(args, partials, holders, isCurried);
+	          }
 
-	      _selection.classed('hover-disabled', true);
+	          if (partialsRight) {
+	            args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
+	          }
 
-	      dispatch$1.call('hover', this, null);
-	    }
-	  }
+	          length -= holdersCount;
 
-	  function keyup(d3_event) {
-	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
+	          if (isCurried && length < arity) {
+	            var newHolders = replaceHolders(args, placeholder);
+	            return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, thisArg, args, newHolders, argPos, ary, arity - length);
+	          }
 
-	      _selection.classed('hover-disabled', false);
+	          var thisBinding = isBind ? thisArg : this,
+	              fn = isBindKey ? thisBinding[func] : func;
+	          length = args.length;
 
-	      dispatch$1.call('hover', this, _targets);
-	    }
-	  }
+	          if (argPos) {
+	            args = reorder(args, argPos);
+	          } else if (isFlip && length > 1) {
+	            args.reverse();
+	          }
 
-	  function behavior(selection) {
-	    _selection = selection;
-	    _targets = [];
+	          if (isAry && ary < length) {
+	            args.length = ary;
+	          }
 
-	    if (_initialNodeID) {
-	      _newNodeId = _initialNodeID;
-	      _initialNodeID = null;
-	    } else {
-	      _newNodeId = null;
-	    }
+	          if (this && this !== root && this instanceof wrapper) {
+	            fn = Ctor || createCtor(fn);
+	          }
 
-	    _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
-	    .on(_pointerPrefix + 'down.hover', pointerover);
+	          return fn.apply(thisBinding, args);
+	        }
 
-	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a function like `_.invertBy`.
+	       *
+	       * @private
+	       * @param {Function} setter The function to set accumulator values.
+	       * @param {Function} toIteratee The function to resolve iteratees.
+	       * @returns {Function} Returns the new inverter function.
+	       */
 
-	    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;
+	      function createInverter(setter, toIteratee) {
+	        return function (object, iteratee) {
+	          return baseInverter(object, setter, toIteratee(iteratee), {});
+	        };
 	      }
+	      /**
+	       * Creates a function that performs a mathematical operation on two values.
+	       *
+	       * @private
+	       * @param {Function} operator The function to perform the operation.
+	       * @param {number} [defaultValue] The value used for `undefined` arguments.
+	       * @returns {Function} Returns the new mathematical operation function.
+	       */
 
-	      return datum;
-	    }
 
-	    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);
+	      function createMathOperation(operator, defaultValue) {
+	        return function (value, other) {
+	          var result;
 
-	      if (target && _targets.indexOf(target) === -1) {
-	        _targets.push(target);
+	          if (value === undefined$1 && other === undefined$1) {
+	            return defaultValue;
+	          }
 
-	        updateHover(d3_event, _targets);
-	      }
-	    }
+	          if (value !== undefined$1) {
+	            result = value;
+	          }
 
-	    function pointerout(d3_event) {
-	      var target = eventTarget(d3_event);
+	          if (other !== undefined$1) {
+	            if (result === undefined$1) {
+	              return other;
+	            }
 
-	      var index = _targets.indexOf(target);
+	            if (typeof value == 'string' || typeof other == 'string') {
+	              value = baseToString(value);
+	              other = baseToString(other);
+	            } else {
+	              value = baseToNumber(value);
+	              other = baseToNumber(other);
+	            }
 
-	      if (index !== -1) {
-	        _targets.splice(index);
+	            result = operator(value, other);
+	          }
 
-	        updateHover(d3_event, _targets);
+	          return result;
+	        };
 	      }
-	    }
+	      /**
+	       * Creates a function like `_.over`.
+	       *
+	       * @private
+	       * @param {Function} arrayFunc The function to iterate over iteratees.
+	       * @returns {Function} Returns the new over function.
+	       */
 
-	    function allowsVertex(d) {
-	      return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	    }
 
-	    function modeAllowsHover(target) {
-	      var mode = context.mode();
+	      function createOver(arrayFunc) {
+	        return flatRest(function (iteratees) {
+	          iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+	          return baseRest(function (args) {
+	            var thisArg = this;
+	            return arrayFunc(iteratees, function (iteratee) {
+	              return apply(iteratee, thisArg, args);
+	            });
+	          });
+	        });
+	      }
+	      /**
+	       * Creates the padding for `string` based on `length`. The `chars` string
+	       * is truncated if the number of characters exceeds `length`.
+	       *
+	       * @private
+	       * @param {number} length The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padding for `string`.
+	       */
 
-	      if (mode.id === 'add-point') {
-	        return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+
+	      function createPadding(length, chars) {
+	        chars = chars === undefined$1 ? ' ' : baseToString(chars);
+	        var charsLength = chars.length;
+
+	        if (charsLength < 2) {
+	          return charsLength ? baseRepeat(chars, length) : chars;
+	        }
+
+	        var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
+	        return hasUnicode(chars) ? castSlice(stringToArray(result), 0, length).join('') : result.slice(0, length);
 	      }
+	      /**
+	       * Creates a function that wraps `func` to invoke it with the `this` binding
+	       * of `thisArg` and `partials` prepended to the arguments it receives.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {*} thisArg The `this` binding of `func`.
+	       * @param {Array} partials The arguments to prepend to those provided to
+	       *  the new function.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	      return true;
-	    }
 
-	    function updateHover(d3_event, targets) {
-	      _selection.selectAll('.hover').classed('hover', false);
+	      function createPartial(func, bitmask, thisArg, partials) {
+	        var isBind = bitmask & WRAP_BIND_FLAG,
+	            Ctor = createCtor(func);
 
-	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+	        function wrapper() {
+	          var argsIndex = -1,
+	              argsLength = arguments.length,
+	              leftIndex = -1,
+	              leftLength = partials.length,
+	              args = Array(leftLength + argsLength),
+	              fn = this && this !== root && this instanceof wrapper ? Ctor : func;
 
-	      var mode = context.mode();
+	          while (++leftIndex < leftLength) {
+	            args[leftIndex] = partials[leftIndex];
+	          }
 
-	      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;
-	      }
+	          while (argsLength--) {
+	            args[leftIndex++] = arguments[++argsIndex];
+	          }
 
-	      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 apply(fn, isBind ? thisArg : this, args);
 	        }
 
-	        return true;
-	      });
-	      var selector = '';
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a `_.range` or `_.rangeRight` function.
+	       *
+	       * @private
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new range function.
+	       */
 
-	      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;
+	      function createRange(fromRight) {
+	        return function (start, end, step) {
+	          if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
+	            end = step = undefined$1;
+	          } // Ensure the sign of `-0` is preserved.
 
-	          if (datum.type === 'relation') {
-	            for (var j in datum.members) {
-	              selector += ', .' + datum.members[j].id;
-	            }
+
+	          start = toFinite(start);
+
+	          if (end === undefined$1) {
+	            end = start;
+	            start = 0;
+	          } else {
+	            end = toFinite(end);
 	          }
-	        }
+
+	          step = step === undefined$1 ? start < end ? 1 : -1 : toFinite(step);
+	          return baseRange(start, end, step, fromRight);
+	        };
 	      }
+	      /**
+	       * Creates a function that performs a relational operation on two values.
+	       *
+	       * @private
+	       * @param {Function} operator The function to perform the operation.
+	       * @returns {Function} Returns the new relational operation function.
+	       */
 
-	      var suppressed = _altDisables && d3_event && d3_event.altKey;
 
-	      if (selector.trim().length) {
-	        // remove the first comma
-	        selector = selector.slice(1);
+	      function createRelationalOperation(operator) {
+	        return function (value, other) {
+	          if (!(typeof value == 'string' && typeof other == 'string')) {
+	            value = toNumber(value);
+	            other = toNumber(other);
+	          }
 
-	        _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+	          return operator(value, other);
+	        };
 	      }
+	      /**
+	       * Creates a function that wraps `func` to continue currying.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {Function} wrapFunc The function to create the `func` wrapper.
+	       * @param {*} placeholder The placeholder value.
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @param {Array} [partials] The arguments to prepend to those provided to
+	       *  the new function.
+	       * @param {Array} [holders] The `partials` placeholder indexes.
+	       * @param {Array} [argPos] The argument positions of the new function.
+	       * @param {number} [ary] The arity cap of `func`.
+	       * @param {number} [arity] The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	      dispatch$1.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);
-	  };
+	      function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+	        var isCurry = bitmask & WRAP_CURRY_FLAG,
+	            newHolders = isCurry ? holders : undefined$1,
+	            newHoldersRight = isCurry ? undefined$1 : holders,
+	            newPartials = isCurry ? partials : undefined$1,
+	            newPartialsRight = isCurry ? undefined$1 : partials;
+	        bitmask |= isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG;
+	        bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
 
-	  behavior.altDisables = function (val) {
-	    if (!arguments.length) return _altDisables;
-	    _altDisables = val;
-	    return behavior;
-	  };
+	        if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
+	          bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
+	        }
 
-	  behavior.ignoreVertex = function (val) {
-	    if (!arguments.length) return _ignoreVertex;
-	    _ignoreVertex = val;
-	    return behavior;
-	  };
+	        var newData = [func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, newHoldersRight, argPos, ary, arity];
+	        var result = wrapFunc.apply(undefined$1, newData);
 
-	  behavior.initialNodeID = function (nodeId) {
-	    _initialNodeID = nodeId;
-	    return behavior;
-	  };
+	        if (isLaziable(func)) {
+	          setData(result, newData);
+	        }
 
-	  return utilRebind(behavior, dispatch$1, 'on');
-	}
+	        result.placeholder = placeholder;
+	        return setWrapToString(result, func, bitmask);
+	      }
+	      /**
+	       * Creates a function like `_.round`.
+	       *
+	       * @private
+	       * @param {string} methodName The name of the `Math` method to use when rounding.
+	       * @returns {Function} Returns the new round function.
+	       */
 
-	var _disableSpace = false;
-	var _lastSpace = null;
-	function behaviorDraw(context) {
-	  var dispatch$1 = dispatch('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);
+	      function createRound(methodName) {
+	        var func = Math[methodName];
+	        return function (number, precision) {
+	          number = toNumber(number);
+	          precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
 
-	  var _edit = behaviorEdit(context);
+	          if (precision && nativeIsFinite(number)) {
+	            // Shift with exponential notation to avoid floating-point issues.
+	            // See [MDN](https://mdn.io/round#Examples) for more details.
+	            var pair = (toString(number) + 'e').split('e'),
+	                value = func(pair[0] + 'e' + (+pair[1] + precision));
+	            pair = (toString(value) + 'e').split('e');
+	            return +(pair[0] + 'e' + (+pair[1] - precision));
+	          }
 
-	  var _closeTolerance = 4;
-	  var _tolerance = 12;
-	  var _mouseLeave = false;
-	  var _lastMouse = null;
+	          return func(number);
+	        };
+	      }
+	      /**
+	       * Creates a set object of `values`.
+	       *
+	       * @private
+	       * @param {Array} values The values to add to the set.
+	       * @returns {Object} Returns the new set.
+	       */
 
-	  var _lastPointerUpEvent;
 
-	  var _downPointer; // use pointer events on supported platforms; fallback to mouse events
+	      var createSet = !(Set && 1 / setToArray(new Set([, -0]))[1] == INFINITY) ? noop : function (values) {
+	        return new Set(values);
+	      };
+	      /**
+	       * Creates a `_.toPairs` or `_.toPairsIn` function.
+	       *
+	       * @private
+	       * @param {Function} keysFunc The function to get the keys of a given object.
+	       * @returns {Function} Returns the new pairs function.
+	       */
 
+	      function createToPairs(keysFunc) {
+	        return function (object) {
+	          var tag = getTag(object);
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
-	  // - `mode/drag_node.js` `datum()`
+	          if (tag == mapTag) {
+	            return mapToArray(object);
+	          }
 
+	          if (tag == setTag) {
+	            return setToPairs(object);
+	          }
 
-	  function datum(d3_event) {
-	    var mode = context.mode();
-	    var isNote = mode && mode.id.indexOf('note') !== -1;
-	    if (d3_event.altKey || isNote) return {};
-	    var element;
+	          return baseToPairs(object, keysFunc(object));
+	        };
+	      }
+	      /**
+	       * Creates a function that either curries or invokes `func` with optional
+	       * `this` binding and partially applied arguments.
+	       *
+	       * @private
+	       * @param {Function|string} func The function or method name to wrap.
+	       * @param {number} bitmask The bitmask flags.
+	       *    1 - `_.bind`
+	       *    2 - `_.bindKey`
+	       *    4 - `_.curry` or `_.curryRight` of a bound function
+	       *    8 - `_.curry`
+	       *   16 - `_.curryRight`
+	       *   32 - `_.partial`
+	       *   64 - `_.partialRight`
+	       *  128 - `_.rearg`
+	       *  256 - `_.ary`
+	       *  512 - `_.flip`
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @param {Array} [partials] The arguments to be partially applied.
+	       * @param {Array} [holders] The `partials` placeholder indexes.
+	       * @param {Array} [argPos] The argument positions of the new function.
+	       * @param {number} [ary] The arity cap of `func`.
+	       * @param {number} [arity] The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	    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)
 
+	      function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+	        var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
 
-	    var d = element.__data__;
-	    return d && d.properties && d.properties.target ? d : {};
-	  }
+	        if (!isBindKey && typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	  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$1.call('down', this, d3_event, datum(d3_event));
-	  }
+	        var length = partials ? partials.length : 0;
 
-	  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 (!length) {
+	          bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
+	          partials = holders = undefined$1;
+	        }
 
-	    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);
-	    }
-	  }
+	        ary = ary === undefined$1 ? ary : nativeMax(toInteger(ary), 0);
+	        arity = arity === undefined$1 ? arity : toInteger(arity);
+	        length -= holders ? holders.length : 0;
 
-	  function pointermove(d3_event) {
-	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
-	      var p2 = _downPointer.pointerLocGetter(d3_event);
+	        if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
+	          var partialsRight = partials,
+	              holdersRight = holders;
+	          partials = holders = undefined$1;
+	        }
 
-	      var dist = geoVecLength(_downPointer.downLoc, p2);
+	        var data = isBindKey ? undefined$1 : getData(func);
+	        var newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity];
 
-	      if (dist >= _closeTolerance) {
-	        _downPointer.isCancelled = true;
-	        dispatch$1.call('downcancel', this);
-	      }
-	    }
+	        if (data) {
+	          mergeData(newData, data);
+	        }
 
-	    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.
+	        func = newData[0];
+	        bitmask = newData[1];
+	        thisArg = newData[2];
+	        partials = newData[3];
+	        holders = newData[4];
+	        arity = newData[9] = newData[9] === undefined$1 ? isBindKey ? 0 : func.length : nativeMax(newData[9] - length, 0);
 
-	    if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
-	    _lastMouse = d3_event;
-	    dispatch$1.call('move', this, d3_event, datum(d3_event));
-	  }
+	        if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
+	          bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
+	        }
 
-	  function pointercancel(d3_event) {
-	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
-	      if (!_downPointer.isCancelled) {
-	        dispatch$1.call('downcancel', this);
+	        if (!bitmask || bitmask == WRAP_BIND_FLAG) {
+	          var result = createBind(func, bitmask, thisArg);
+	        } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
+	          result = createCurry(func, bitmask, arity);
+	        } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
+	          result = createPartial(func, bitmask, thisArg, partials);
+	        } else {
+	          result = createHybrid.apply(undefined$1, newData);
+	        }
+
+	        var setter = data ? baseSetData : setData;
+	        return setWrapToString(setter(result, newData), func, bitmask);
 	      }
+	      /**
+	       * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+	       * of source objects to the destination object for all destination properties
+	       * that resolve to `undefined`.
+	       *
+	       * @private
+	       * @param {*} objValue The destination value.
+	       * @param {*} srcValue The source value.
+	       * @param {string} key The key of the property to assign.
+	       * @param {Object} object The parent object of `objValue`.
+	       * @returns {*} Returns the value to assign.
+	       */
 
-	      _downPointer = null;
-	    }
-	  }
 
-	  function mouseenter() {
-	    _mouseLeave = false;
-	  }
+	      function customDefaultsAssignIn(objValue, srcValue, key, object) {
+	        if (objValue === undefined$1 || eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+	          return srcValue;
+	        }
 
-	  function mouseleave() {
-	    _mouseLeave = true;
-	  }
+	        return objValue;
+	      }
+	      /**
+	       * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
+	       * objects into destination objects that are passed thru.
+	       *
+	       * @private
+	       * @param {*} objValue The destination value.
+	       * @param {*} srcValue The source value.
+	       * @param {string} key The key of the property to merge.
+	       * @param {Object} object The parent object of `objValue`.
+	       * @param {Object} source The parent object of `srcValue`.
+	       * @param {Object} [stack] Tracks traversed source values and their merged
+	       *  counterparts.
+	       * @returns {*} Returns the value to assign.
+	       */
 
-	  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()`
 
+	      function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
+	        if (isObject(objValue) && isObject(srcValue)) {
+	          // Recursively merge objects and arrays (susceptible to call stack limits).
+	          stack.set(srcValue, objValue);
+	          baseMerge(objValue, srcValue, undefined$1, customDefaultsMerge, stack);
+	          stack['delete'](srcValue);
+	        }
 
-	  function click(d3_event, loc) {
-	    var d = datum(d3_event);
-	    var target = d && d.properties && d.properties.entity;
-	    var mode = context.mode();
+	        return objValue;
+	      }
+	      /**
+	       * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
+	       * objects.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @param {string} key The key of the property to inspect.
+	       * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
+	       */
 
-	    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;
+	      function customOmitClone(value) {
+	        return isPlainObject(value) ? undefined$1 : value;
 	      }
-	    } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-	      var locLatLng = context.projection.invert(loc);
-	      dispatch$1.call('click', this, locLatLng, d);
-	    }
-	  } // treat a spacebar press like a click
+	      /**
+	       * A specialized version of `baseIsEqualDeep` for arrays with support for
+	       * partial deep comparisons.
+	       *
+	       * @private
+	       * @param {Array} array The array to compare.
+	       * @param {Array} other The other array to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} stack Tracks traversed `array` and `other` objects.
+	       * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+	       */
 
 
-	  function space(d3_event) {
-	    d3_event.preventDefault();
-	    d3_event.stopPropagation();
-	    var currSpace = context.map().mouse();
+	      function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+	        var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+	            arrLength = array.length,
+	            othLength = other.length;
 
-	    if (_disableSpace && _lastSpace) {
-	      var dist = geoVecLength(_lastSpace, currSpace);
+	        if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+	          return false;
+	        } // Check that cyclic values are equal.
 
-	      if (dist > _tolerance) {
-	        _disableSpace = false;
-	      }
-	    }
 
-	    if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
+	        var arrStacked = stack.get(array);
+	        var othStacked = stack.get(other);
 
-	    _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
+	        if (arrStacked && othStacked) {
+	          return arrStacked == other && othStacked == array;
+	        }
 
-	    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 index = -1,
+	            result = true,
+	            seen = bitmask & COMPARE_UNORDERED_FLAG ? new SetCache() : undefined$1;
+	        stack.set(array, other);
+	        stack.set(other, array); // Ignore non-index properties.
 
-	  function backspace(d3_event) {
-	    d3_event.preventDefault();
-	    dispatch$1.call('undo');
-	  }
+	        while (++index < arrLength) {
+	          var arrValue = array[index],
+	              othValue = other[index];
 
-	  function del(d3_event) {
-	    d3_event.preventDefault();
-	    dispatch$1.call('cancel');
-	  }
+	          if (customizer) {
+	            var compared = isPartial ? customizer(othValue, arrValue, index, other, array, stack) : customizer(arrValue, othValue, index, array, other, stack);
+	          }
 
-	  function ret(d3_event) {
-	    d3_event.preventDefault();
-	    dispatch$1.call('finish');
-	  }
+	          if (compared !== undefined$1) {
+	            if (compared) {
+	              continue;
+	            }
 
-	  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;
-	  }
+	            result = false;
+	            break;
+	          } // Recursively compare arrays (susceptible to call stack limits).
 
-	  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);
-	  };
+	          if (seen) {
+	            if (!arraySome(other, function (othValue, othIndex) {
+	              if (!cacheHas(seen, othIndex) && (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+	                return seen.push(othIndex);
+	              }
+	            })) {
+	              result = false;
+	              break;
+	            }
+	          } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+	            result = false;
+	            break;
+	          }
+	        }
 
-	  behavior.hover = function () {
-	    return _hover;
-	  };
+	        stack['delete'](array);
+	        stack['delete'](other);
+	        return result;
+	      }
+	      /**
+	       * A specialized version of `baseIsEqualDeep` for comparing objects of
+	       * the same `toStringTag`.
+	       *
+	       * **Note:** This function only supports comparing values with tags of
+	       * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {string} tag The `toStringTag` of the objects to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} stack Tracks traversed `object` and `other` objects.
+	       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+	       */
 
-	  return utilRebind(behavior, dispatch$1, 'on');
-	}
 
-	function initRange(domain, range) {
-	  switch (arguments.length) {
-	    case 0:
-	      break;
+	      function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+	        switch (tag) {
+	          case dataViewTag:
+	            if (object.byteLength != other.byteLength || object.byteOffset != other.byteOffset) {
+	              return false;
+	            }
 
-	    case 1:
-	      this.range(domain);
-	      break;
+	            object = object.buffer;
+	            other = other.buffer;
 
-	    default:
-	      this.range(range).domain(domain);
-	      break;
-	  }
+	          case arrayBufferTag:
+	            if (object.byteLength != other.byteLength || !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+	              return false;
+	            }
 
-	  return this;
-	}
+	            return true;
 
-	function constants(x) {
-	  return function () {
-	    return x;
-	  };
-	}
+	          case boolTag:
+	          case dateTag:
+	          case numberTag:
+	            // Coerce booleans to `1` or `0` and dates to milliseconds.
+	            // Invalid dates are coerced to `NaN`.
+	            return eq(+object, +other);
 
-	function number$1(x) {
-	  return +x;
-	}
+	          case errorTag:
+	            return object.name == other.name && object.message == other.message;
 
-	var unit = [0, 1];
-	function identity$3(x) {
-	  return x;
-	}
+	          case regexpTag:
+	          case stringTag:
+	            // Coerce regexes to strings and treat strings, primitives and objects,
+	            // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
+	            // for more details.
+	            return object == other + '';
 
-	function normalize$1(a, b) {
-	  return (b -= a = +a) ? function (x) {
-	    return (x - a) / b;
-	  } : constants(isNaN(b) ? NaN : 0.5);
-	}
+	          case mapTag:
+	            var convert = mapToArray;
 
-	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].
+	          case setTag:
+	            var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
+	            convert || (convert = setToArray);
 
+	            if (object.size != other.size && !isPartial) {
+	              return false;
+	            } // Assume cyclic values are equal.
 
-	function bimap(domain, range, interpolate) {
-	  var d0 = domain[0],
-	      d1 = domain[1],
-	      r0 = range[0],
-	      r1 = range[1];
-	  if (d1 < d0) d0 = normalize$1(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize$1(d0, d1), r0 = interpolate(r0, r1);
-	  return function (x) {
-	    return r0(d0(x));
-	  };
-	}
 
-	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.
+	            var stacked = stack.get(object);
 
-	  if (domain[j] < domain[0]) {
-	    domain = domain.slice().reverse();
-	    range = range.slice().reverse();
-	  }
+	            if (stacked) {
+	              return stacked == other;
+	            }
 
-	  while (++i < j) {
-	    d[i] = normalize$1(domain[i], domain[i + 1]);
-	    r[i] = interpolate(range[i], range[i + 1]);
-	  }
+	            bitmask |= COMPARE_UNORDERED_FLAG; // Recursively compare objects (susceptible to call stack limits).
 
-	  return function (x) {
-	    var i = bisectRight(domain, x, 1, j) - 1;
-	    return r[i](d[i](x));
-	  };
-	}
+	            stack.set(object, other);
+	            var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
+	            stack['delete'](object);
+	            return result;
 
-	function copy(source, target) {
-	  return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
-	}
-	function transformer$1() {
-	  var domain = unit,
-	      range = unit,
-	      interpolate$1 = interpolate,
-	      transform,
-	      untransform,
-	      unknown,
-	      clamp = identity$3,
-	      piecewise,
-	      output,
-	      input;
+	          case symbolTag:
+	            if (symbolValueOf) {
+	              return symbolValueOf.call(object) == symbolValueOf.call(other);
+	            }
 
-	  function rescale() {
-	    var n = Math.min(domain.length, range.length);
-	    if (clamp !== identity$3) clamp = clamper(domain[0], domain[n - 1]);
-	    piecewise = n > 2 ? polymap : bimap;
-	    output = input = null;
-	    return scale;
-	  }
+	        }
 
-	  function scale(x) {
-	    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
-	  }
+	        return false;
+	      }
+	      /**
+	       * A specialized version of `baseIsEqualDeep` for objects with support for
+	       * partial deep comparisons.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} stack Tracks traversed `object` and `other` objects.
+	       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+	       */
 
-	  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$1), rescale()) : domain.slice();
-	  };
+	      function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
+	        var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+	            objProps = getAllKeys(object),
+	            objLength = objProps.length,
+	            othProps = getAllKeys(other),
+	            othLength = othProps.length;
 
-	  scale.range = function (_) {
-	    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
-	  };
+	        if (objLength != othLength && !isPartial) {
+	          return false;
+	        }
 
-	  scale.rangeRound = function (_) {
-	    return range = Array.from(_), interpolate$1 = interpolateRound, rescale();
-	  };
+	        var index = objLength;
 
-	  scale.clamp = function (_) {
-	    return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
-	  };
+	        while (index--) {
+	          var key = objProps[index];
 
-	  scale.interpolate = function (_) {
-	    return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
-	  };
+	          if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+	            return false;
+	          }
+	        } // Check that cyclic values are equal.
 
-	  scale.unknown = function (_) {
-	    return arguments.length ? (unknown = _, scale) : unknown;
-	  };
 
-	  return function (t, u) {
-	    transform = t, untransform = u;
-	    return rescale();
-	  };
-	}
-	function continuous() {
-	  return transformer$1()(identity$3, identity$3);
-	}
+	        var objStacked = stack.get(object);
+	        var othStacked = stack.get(other);
 
-	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].
+	        if (objStacked && othStacked) {
+	          return objStacked == other && othStacked == object;
+	        }
 
-	function formatDecimalParts(x, p) {
-	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+	        var result = true;
+	        stack.set(object, other);
+	        stack.set(other, object);
+	        var skipCtor = isPartial;
 
-	  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).
+	        while (++index < objLength) {
+	          key = objProps[index];
+	          var objValue = object[key],
+	              othValue = other[key];
 
-	  return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
-	}
+	          if (customizer) {
+	            var compared = isPartial ? customizer(othValue, objValue, key, other, object, stack) : customizer(objValue, othValue, key, object, other, stack);
+	          } // Recursively compare objects (susceptible to call stack limits).
 
-	function exponent (x) {
-	  return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
-	}
 
-	function formatGroup (grouping, thousands) {
-	  return function (value, width) {
-	    var i = value.length,
-	        t = [],
-	        j = 0,
-	        g = grouping[0],
-	        length = 0;
+	          if (!(compared === undefined$1 ? objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack) : compared)) {
+	            result = false;
+	            break;
+	          }
 
-	    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];
-	    }
+	          skipCtor || (skipCtor = key == 'constructor');
+	        }
 
-	    return t.reverse().join(thousands);
-	  };
-	}
+	        if (result && !skipCtor) {
+	          var objCtor = object.constructor,
+	              othCtor = other.constructor; // Non `Object` object instances with different constructors are not equal.
 
-	function formatNumerals (numerals) {
-	  return function (value) {
-	    return value.replace(/[0-9]/g, function (i) {
-	      return numerals[+i];
-	    });
-	  };
-	}
+	          if (objCtor != othCtor && 'constructor' in object && 'constructor' in other && !(typeof objCtor == 'function' && objCtor instanceof objCtor && typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+	            result = false;
+	          }
+	        }
 
-	// [[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
+	        stack['delete'](object);
+	        stack['delete'](other);
+	        return result;
+	      }
+	      /**
+	       * A specialized version of `baseRest` which flattens the rest array.
+	       *
+	       * @private
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @returns {Function} Returns the new function.
+	       */
 
-	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 + "";
-	}
 
-	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 flatRest(func) {
+	        return setToString(overRest(func, undefined$1, flatten), func + '');
+	      }
+	      /**
+	       * Creates an array of own enumerable property names and symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names and symbols.
+	       */
 
-	// 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;
+	      function getAllKeys(object) {
+	        return baseGetAllKeys(object, keys, getSymbols);
+	      }
+	      /**
+	       * Creates an array of own and inherited enumerable property names and
+	       * symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names and symbols.
+	       */
 
-	      default:
-	        if (!+s[i]) break out;
-	        if (i0 > 0) i0 = 0;
-	        break;
-	    }
-	  }
 
-	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-	}
+	      function getAllKeysIn(object) {
+	        return baseGetAllKeys(object, keysIn, getSymbolsIn);
+	      }
+	      /**
+	       * Gets metadata for `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to query.
+	       * @returns {*} Returns the metadata for `func`.
+	       */
 
-	// `thisNumberValue` abstract operation
-	// https://tc39.github.io/ecma262/#sec-thisnumbervalue
-	var thisNumberValue = function (value) {
-	  if (typeof value != 'number' && classofRaw(value) != 'Number') {
-	    throw TypeError('Incorrect invocation');
-	  }
-	  return +value;
-	};
 
-	// `String.prototype.repeat` method implementation
-	// https://tc39.github.io/ecma262/#sec-string.prototype.repeat
-	var stringRepeat = ''.repeat || function repeat(count) {
-	  var str = String(requireObjectCoercible(this));
-	  var result = '';
-	  var n = toInteger(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 getData = !metaMap ? noop : function (func) {
+	        return metaMap.get(func);
+	      };
+	      /**
+	       * Gets the name of `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to query.
+	       * @returns {string} Returns the function name.
+	       */
 
-	var nativeToFixed = 1.0.toFixed;
-	var floor$6 = Math.floor;
+	      function getFuncName(func) {
+	        var result = func.name + '',
+	            array = realNames[result],
+	            length = hasOwnProperty.call(realNames, result) ? array.length : 0;
 
-	var pow$2 = function (x, n, acc) {
-	  return n === 0 ? acc : n % 2 === 1 ? pow$2(x, n - 1, acc * x) : pow$2(x * x, n / 2, acc);
-	};
+	        while (length--) {
+	          var data = array[length],
+	              otherFunc = data.func;
 
-	var log$2 = function (x) {
-	  var n = 0;
-	  var x2 = x;
-	  while (x2 >= 4096) {
-	    n += 12;
-	    x2 /= 4096;
-	  }
-	  while (x2 >= 2) {
-	    n += 1;
-	    x2 /= 2;
-	  } return n;
-	};
+	          if (otherFunc == null || otherFunc == func) {
+	            return data.name;
+	          }
+	        }
 
-	var FORCED$c = nativeToFixed && (
-	  0.00008.toFixed(3) !== '0.000' ||
-	  0.9.toFixed(0) !== '1' ||
-	  1.255.toFixed(2) !== '1.25' ||
-	  1000000000000000128.0.toFixed(0) !== '1000000000000000128'
-	) || !fails(function () {
-	  // V8 ~ Android 4.3-
-	  nativeToFixed.call({});
-	});
+	        return result;
+	      }
+	      /**
+	       * Gets the argument placeholder value for `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to inspect.
+	       * @returns {*} Returns the placeholder value.
+	       */
 
-	// `Number.prototype.toFixed` method
-	// https://tc39.github.io/ecma262/#sec-number.prototype.tofixed
-	_export({ target: 'Number', proto: true, forced: FORCED$c }, {
-	  // eslint-disable-next-line max-statements
-	  toFixed: function toFixed(fractionDigits) {
-	    var number = thisNumberValue(this);
-	    var fractDigits = toInteger(fractionDigits);
-	    var data = [0, 0, 0, 0, 0, 0];
-	    var sign = '';
-	    var result = '0';
-	    var e, z, j, k;
 
-	    var multiply = function (n, c) {
-	      var index = -1;
-	      var c2 = c;
-	      while (++index < 6) {
-	        c2 += n * data[index];
-	        data[index] = c2 % 1e7;
-	        c2 = floor$6(c2 / 1e7);
+	      function getHolder(func) {
+	        var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
+	        return object.placeholder;
 	      }
-	    };
+	      /**
+	       * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
+	       * this function returns the custom method, otherwise it returns `baseIteratee`.
+	       * If arguments are provided, the chosen function is invoked with them and
+	       * its result is returned.
+	       *
+	       * @private
+	       * @param {*} [value] The value to convert to an iteratee.
+	       * @param {number} [arity] The arity of the created iteratee.
+	       * @returns {Function} Returns the chosen function or its result.
+	       */
+
 
-	    var divide = function (n) {
-	      var index = 6;
-	      var c = 0;
-	      while (--index >= 0) {
-	        c += data[index];
-	        data[index] = floor$6(c / n);
-	        c = (c % n) * 1e7;
+	      function getIteratee() {
+	        var result = lodash.iteratee || iteratee;
+	        result = result === iteratee ? baseIteratee : result;
+	        return arguments.length ? result(arguments[0], arguments[1]) : result;
 	      }
-	    };
+	      /**
+	       * Gets the data for `map`.
+	       *
+	       * @private
+	       * @param {Object} map The map to query.
+	       * @param {string} key The reference key.
+	       * @returns {*} Returns the map data.
+	       */
 
-	    var dataToString = function () {
-	      var index = 6;
-	      var s = '';
-	      while (--index >= 0) {
-	        if (s !== '' || index === 0 || data[index] !== 0) {
-	          var t = String(data[index]);
-	          s = s === '' ? t : s + stringRepeat.call('0', 7 - t.length) + t;
-	        }
-	      } return s;
-	    };
 
-	    if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
-	    // eslint-disable-next-line no-self-compare
-	    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$2(number * pow$2(2, 69, 1)) - 69;
-	      z = e < 0 ? number * pow$2(2, -e, 1) : number / pow$2(2, e, 1);
-	      z *= 0x10000000000000;
-	      e = 52 - e;
-	      if (e > 0) {
-	        multiply(0, z);
-	        j = fractDigits;
-	        while (j >= 7) {
-	          multiply(1e7, 0);
-	          j -= 7;
-	        }
-	        multiply(pow$2(10, j, 1), 0);
-	        j = e - 1;
-	        while (j >= 23) {
-	          divide(1 << 23);
-	          j -= 23;
+	      function getMapData(map, key) {
+	        var data = map.__data__;
+	        return isKeyable(key) ? data[typeof key == 'string' ? 'string' : 'hash'] : data.map;
+	      }
+	      /**
+	       * Gets the property names, values, and compare flags of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the match data of `object`.
+	       */
+
+
+	      function getMatchData(object) {
+	        var result = keys(object),
+	            length = result.length;
+
+	        while (length--) {
+	          var key = result[length],
+	              value = object[key];
+	          result[length] = [key, value, isStrictComparable(value)];
 	        }
-	        divide(1 << j);
-	        multiply(1, 1);
-	        divide(2);
-	        result = dataToString();
-	      } else {
-	        multiply(0, z);
-	        multiply(1 << -e, 0);
-	        result = dataToString() + stringRepeat.call('0', fractDigits);
+
+	        return result;
 	      }
-	    }
-	    if (fractDigits > 0) {
-	      k = result.length;
-	      result = sign + (k <= fractDigits
-	        ? '0.' + stringRepeat.call('0', fractDigits - k) + result
-	        : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));
-	    } else {
-	      result = sign + result;
-	    } return result;
-	  }
-	});
+	      /**
+	       * Gets the native function at `key` of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {string} key The key of the method to get.
+	       * @returns {*} Returns the function if it's native, else `undefined`.
+	       */
 
-	var nativeToPrecision = 1.0.toPrecision;
 
-	var FORCED$d = fails(function () {
-	  // IE7-
-	  return nativeToPrecision.call(1, undefined) !== '1';
-	}) || !fails(function () {
-	  // V8 ~ Android 4.3-
-	  nativeToPrecision.call({});
-	});
+	      function getNative(object, key) {
+	        var value = getValue(object, key);
+	        return baseIsNative(value) ? value : undefined$1;
+	      }
+	      /**
+	       * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @returns {string} Returns the raw `toStringTag`.
+	       */
 
-	// `Number.prototype.toPrecision` method
-	// https://tc39.github.io/ecma262/#sec-number.prototype.toprecision
-	_export({ target: 'Number', proto: true, forced: FORCED$d }, {
-	  toPrecision: function toPrecision(precision) {
-	    return precision === undefined
-	      ? nativeToPrecision.call(thisNumberValue(this))
-	      : nativeToPrecision.call(thisNumberValue(this), precision);
-	  }
-	});
 
-	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 getRawTag(value) {
+	        var isOwn = hasOwnProperty.call(value, symToStringTag),
+	            tag = value[symToStringTag];
 
-	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");
-	}
+	        try {
+	          value[symToStringTag] = undefined$1;
+	          var unmasked = true;
+	        } catch (e) {}
 
-	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);
-	  }
-	};
+	        var result = nativeObjectToString.call(value);
 
-	function identity$4 (x) {
-	  return x;
-	}
+	        if (unmasked) {
+	          if (isOwn) {
+	            value[symToStringTag] = tag;
+	          } else {
+	            delete value[symToStringTag];
+	          }
+	        }
 
-	var map = 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.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.call(locale.numerals, String)),
-	      percent = locale.percent === undefined ? "%" : locale.percent + "",
-	      minus = locale.minus === undefined ? "−" : locale.minus + "",
-	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
+	        return result;
+	      }
+	      /**
+	       * Creates an array of the own enumerable symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of symbols.
+	       */
+
+
+	      var getSymbols = !nativeGetSymbols ? stubArray : function (object) {
+	        if (object == null) {
+	          return [];
+	        }
+
+	        object = Object(object);
+	        return arrayFilter(nativeGetSymbols(object), function (symbol) {
+	          return propertyIsEnumerable.call(object, symbol);
+	        });
+	      };
+	      /**
+	       * Creates an array of the own and inherited enumerable symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of symbols.
+	       */
 
-	  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".
+	      var getSymbolsIn = !nativeGetSymbols ? stubArray : function (object) {
+	        var result = [];
 
-	    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.
+	        while (object) {
+	          arrayPush(result, getSymbols(object));
+	          object = getPrototype(object);
+	        }
 
-	    if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
-	    // For SI-prefix, the suffix is lazily computed.
+	        return result;
+	      };
+	      /**
+	       * Gets the `toStringTag` of `value`.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @returns {string} Returns the `toStringTag`.
+	       */
 
-	    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?
+	      var getTag = baseGetTag; // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
 
-	    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].
+	      if (DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag || Map && getTag(new Map()) != mapTag || Promise && getTag(Promise.resolve()) != promiseTag || Set && getTag(new Set()) != setTag || WeakMap && getTag(new WeakMap()) != weakMapTag) {
+	        getTag = function getTag(value) {
+	          var result = baseGetTag(value),
+	              Ctor = result == objectTag ? value.constructor : undefined$1,
+	              ctorString = Ctor ? toSource(Ctor) : '';
 
-	    precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
+	          if (ctorString) {
+	            switch (ctorString) {
+	              case dataViewCtorString:
+	                return dataViewTag;
 
-	    function format(value) {
-	      var valuePrefix = prefix,
-	          valueSuffix = suffix,
-	          i,
-	          n,
-	          c;
+	              case mapCtorString:
+	                return mapTag;
 
-	      if (type === "c") {
-	        valueSuffix = formatType(value) + valueSuffix;
-	        value = "";
-	      } else {
-	        value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+	              case promiseCtorString:
+	                return promiseTag;
 
-	        var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
+	              case setCtorString:
+	                return setTag;
 
-	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
+	              case weakMapCtorString:
+	                return weakMapTag;
+	            }
+	          }
 
-	        if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+	          return result;
+	        };
+	      }
+	      /**
+	       * Gets the view, applying any `transforms` to the `start` and `end` positions.
+	       *
+	       * @private
+	       * @param {number} start The start of the view.
+	       * @param {number} end The end of the view.
+	       * @param {Array} transforms The transformations to apply to the view.
+	       * @returns {Object} Returns an object containing the `start` and `end`
+	       *  positions of the view.
+	       */
 
-	        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-	        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.
+	      function getView(start, end, transforms) {
+	        var index = -1,
+	            length = transforms.length;
 
-	        if (maybeSuffix) {
-	          i = -1, n = value.length;
+	        while (++index < length) {
+	          var data = transforms[index],
+	              size = data.size;
 
-	          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);
+	          switch (data.type) {
+	            case 'drop':
+	              start += size;
+	              break;
+
+	            case 'dropRight':
+	              end -= size;
+	              break;
+
+	            case 'take':
+	              end = nativeMin(end, start + size);
+	              break;
+
+	            case 'takeRight':
+	              start = nativeMax(start, end - size);
 	              break;
-	            }
 	          }
 	        }
-	      } // If the fill character is not "0", grouping is applied before padding.
 
+	        return {
+	          'start': start,
+	          'end': end
+	        };
+	      }
+	      /**
+	       * Extracts wrapper details from the `source` body comment.
+	       *
+	       * @private
+	       * @param {string} source The source to inspect.
+	       * @returns {Array} Returns the wrapper details.
+	       */
 
-	      if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-	      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.
+	      function getWrapDetails(source) {
+	        var match = source.match(reWrapDetails);
+	        return match ? match[1].split(reSplitDetails) : [];
+	      }
+	      /**
+	       * Checks if `path` exists on `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path to check.
+	       * @param {Function} hasFunc The function to check properties.
+	       * @returns {boolean} Returns `true` if `path` exists, else `false`.
+	       */
 
-	      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-	      switch (align) {
-	        case "<":
-	          value = valuePrefix + value + valueSuffix + padding;
-	          break;
+	      function hasPath(object, path, hasFunc) {
+	        path = castPath(path, object);
+	        var index = -1,
+	            length = path.length,
+	            result = false;
 
-	        case "=":
-	          value = valuePrefix + padding + value + valueSuffix;
-	          break;
+	        while (++index < length) {
+	          var key = toKey(path[index]);
 
-	        case "^":
-	          value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
-	          break;
+	          if (!(result = object != null && hasFunc(object, key))) {
+	            break;
+	          }
 
-	        default:
-	          value = padding + valuePrefix + value + valueSuffix;
-	          break;
+	          object = object[key];
+	        }
+
+	        if (result || ++index != length) {
+	          return result;
+	        }
+
+	        length = object == null ? 0 : object.length;
+	        return !!length && isLength(length) && isIndex(key, length) && (isArray(object) || isArguments(object));
 	      }
+	      /**
+	       * Initializes an array clone.
+	       *
+	       * @private
+	       * @param {Array} array The array to clone.
+	       * @returns {Array} Returns the initialized clone.
+	       */
 
-	      return numerals(value);
-	    }
 
-	    format.toString = function () {
-	      return specifier + "";
-	    };
+	      function initCloneArray(array) {
+	        var length = array.length,
+	            result = new array.constructor(length); // Add properties assigned by `RegExp#exec`.
 
-	    return format;
-	  }
+	        if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+	          result.index = array.index;
+	          result.input = array.input;
+	        }
 
-	  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;
-	    };
-	  }
+	        return result;
+	      }
+	      /**
+	       * Initializes an object clone.
+	       *
+	       * @private
+	       * @param {Object} object The object to clone.
+	       * @returns {Object} Returns the initialized clone.
+	       */
 
-	  return {
-	    format: newFormat,
-	    formatPrefix: formatPrefix
-	  };
-	}
 
-	var locale;
-	var format;
-	var formatPrefix;
-	defaultLocale({
-	  thousands: ",",
-	  grouping: [3],
-	  currency: ["$", ""]
-	});
-	function defaultLocale(definition) {
-	  locale = formatLocale(definition);
-	  format = locale.format;
-	  formatPrefix = locale.formatPrefix;
-	  return locale;
-	}
+	      function initCloneObject(object) {
+	        return typeof object.constructor == 'function' && !isPrototype(object) ? baseCreate(getPrototype(object)) : {};
+	      }
+	      /**
+	       * Initializes an object clone based on its `toStringTag`.
+	       *
+	       * **Note:** This function only supports cloning values with tags of
+	       * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
+	       *
+	       * @private
+	       * @param {Object} object The object to clone.
+	       * @param {string} tag The `toStringTag` of the object to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Object} Returns the initialized clone.
+	       */
 
-	function precisionFixed (step) {
-	  return Math.max(0, -exponent(Math.abs(step)));
-	}
 
-	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 initCloneByTag(object, tag, isDeep) {
+	        var Ctor = object.constructor;
 
-	function precisionRound (step, max) {
-	  step = Math.abs(step), max = Math.abs(max) - step;
-	  return Math.max(0, exponent(max) - exponent(step)) + 1;
-	}
+	        switch (tag) {
+	          case arrayBufferTag:
+	            return cloneArrayBuffer(object);
 
-	function tickFormat(start, stop, count, specifier) {
-	  var step = tickStep(start, stop, count),
-	      precision;
-	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+	          case boolTag:
+	          case dateTag:
+	            return new Ctor(+object);
 
-	  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 dataViewTag:
+	            return cloneDataView(object, isDeep);
 
-	    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;
-	      }
+	          case float32Tag:
+	          case float64Tag:
+	          case int8Tag:
+	          case int16Tag:
+	          case int32Tag:
+	          case uint8Tag:
+	          case uint8ClampedTag:
+	          case uint16Tag:
+	          case uint32Tag:
+	            return cloneTypedArray(object, isDeep);
 
-	    case "f":
-	    case "%":
-	      {
-	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
-	        break;
+	          case mapTag:
+	            return new Ctor();
+
+	          case numberTag:
+	          case stringTag:
+	            return new Ctor(object);
+
+	          case regexpTag:
+	            return cloneRegExp(object);
+
+	          case setTag:
+	            return new Ctor();
+
+	          case symbolTag:
+	            return cloneSymbol(object);
+	        }
 	      }
-	  }
+	      /**
+	       * Inserts wrapper `details` in a comment at the top of the `source` body.
+	       *
+	       * @private
+	       * @param {string} source The source to modify.
+	       * @returns {Array} details The details to insert.
+	       * @returns {string} Returns the modified source.
+	       */
 
-	  return format(specifier);
-	}
 
-	function linearish(scale) {
-	  var domain = scale.domain;
+	      function insertWrapDetails(source, details) {
+	        var length = details.length;
 
-	  scale.ticks = function (count) {
-	    var d = domain();
-	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-	  };
+	        if (!length) {
+	          return source;
+	        }
 
-	  scale.tickFormat = function (count, specifier) {
-	    var d = domain();
-	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
-	  };
+	        var lastIndex = length - 1;
+	        details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
+	        details = details.join(length > 2 ? ', ' : ' ');
+	        return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
+	      }
+	      /**
+	       * Checks if `value` is a flattenable `arguments` object or array.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+	       */
 
-	  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;
 
-	    if (stop < start) {
-	      step = start, start = stop, stop = step;
-	      step = i0, i0 = i1, i1 = step;
-	    }
+	      function isFlattenable(value) {
+	        return isArray(value) || isArguments(value) || !!(spreadableSymbol && value && value[spreadableSymbol]);
+	      }
+	      /**
+	       * Checks if `value` is a valid array-like index.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+	       * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+	       */
 
-	    while (maxIter-- > 0) {
-	      step = tickIncrement(start, stop, count);
 
-	      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;
+	      function isIndex(value, length) {
+	        var type = _typeof(value);
+
+	        length = length == null ? MAX_SAFE_INTEGER : length;
+	        return !!length && (type == 'number' || type != 'symbol' && reIsUint.test(value)) && value > -1 && value % 1 == 0 && value < length;
 	      }
+	      /**
+	       * Checks if the given arguments are from an iteratee call.
+	       *
+	       * @private
+	       * @param {*} value The potential iteratee value argument.
+	       * @param {*} index The potential iteratee index or key argument.
+	       * @param {*} object The potential iteratee object argument.
+	       * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+	       *  else `false`.
+	       */
 
-	      prestep = step;
-	    }
 
-	    return scale;
-	  };
+	      function isIterateeCall(value, index, object) {
+	        if (!isObject(object)) {
+	          return false;
+	        }
 
-	  return scale;
-	}
-	function linear$2() {
-	  var scale = continuous();
+	        var type = _typeof(index);
 
-	  scale.copy = function () {
-	    return copy(scale, linear$2());
-	  };
+	        if (type == 'number' ? isArrayLike(object) && isIndex(index, object.length) : type == 'string' && index in object) {
+	          return eq(object[index], value);
+	        }
 
-	  initRange.apply(scale, arguments);
-	  return linearish(scale);
-	}
+	        return false;
+	      }
+	      /**
+	       * Checks if `value` is a property name and not a property path.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @param {Object} [object] The object to query keys on.
+	       * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+	       */
 
-	var nativeExpm1 = Math.expm1;
-	var exp$1 = Math.exp;
 
-	// `Math.expm1` method implementation
-	// https://tc39.github.io/ecma262/#sec-math.expm1
-	var mathExpm1 = (!nativeExpm1
-	  // Old FF bug
-	  || nativeExpm1(10) > 22025.465794806719 || nativeExpm1(10) < 22025.4657948067165168
-	  // Tor Browser bug
-	  || nativeExpm1(-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;
-	} : nativeExpm1;
+	      function isKey(value, object) {
+	        if (isArray(value)) {
+	          return false;
+	        }
 
-	function quantize() {
-	  var x0 = 0,
-	      x1 = 1,
-	      n = 1,
-	      domain = [0.5],
-	      range = [0, 1],
-	      unknown;
+	        var type = _typeof(value);
 
-	  function scale(x) {
-	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-	  }
+	        if (type == 'number' || type == 'symbol' || type == 'boolean' || value == null || isSymbol(value)) {
+	          return true;
+	        }
 
-	  function rescale() {
-	    var i = -1;
-	    domain = new Array(n);
+	        return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || object != null && value in Object(object);
+	      }
+	      /**
+	       * Checks if `value` is suitable for use as unique object key.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+	       */
 
-	    while (++i < n) {
-	      domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
-	    }
 
-	    return scale;
-	  }
+	      function isKeyable(value) {
+	        var type = _typeof(value);
 
-	  scale.domain = function (_) {
-	    var _ref, _ref2;
+	        return type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean' ? value !== '__proto__' : value === null;
+	      }
+	      /**
+	       * Checks if `func` has a lazy counterpart.
+	       *
+	       * @private
+	       * @param {Function} func The function to check.
+	       * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+	       *  else `false`.
+	       */
 
-	    return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
-	  };
 
-	  scale.range = function (_) {
-	    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
-	  };
+	      function isLaziable(func) {
+	        var funcName = getFuncName(func),
+	            other = lodash[funcName];
 
-	  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 (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+	          return false;
+	        }
 
-	  scale.unknown = function (_) {
-	    return arguments.length ? (unknown = _, scale) : scale;
-	  };
+	        if (func === other) {
+	          return true;
+	        }
 
-	  scale.thresholds = function () {
-	    return domain.slice();
-	  };
+	        var data = getData(other);
+	        return !!data && func === data[0];
+	      }
+	      /**
+	       * Checks if `func` has its source masked.
+	       *
+	       * @private
+	       * @param {Function} func The function to check.
+	       * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+	       */
 
-	  scale.copy = function () {
-	    return quantize().domain([x0, x1]).range(range).unknown(unknown);
-	  };
 
-	  return initRange.apply(linearish(scale), arguments);
-	}
+	      function isMasked(func) {
+	        return !!maskSrcKey && maskSrcKey in func;
+	      }
+	      /**
+	       * Checks if `func` is capable of being masked.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+	       */
 
-	// https://github.com/tc39/proposal-string-pad-start-end
 
+	      var isMaskable = coreJsData ? isFunction : stubFalse;
+	      /**
+	       * Checks if `value` is likely a prototype object.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+	       */
 
+	      function isPrototype(value) {
+	        var Ctor = value && value.constructor,
+	            proto = typeof Ctor == 'function' && Ctor.prototype || objectProto;
+	        return value === proto;
+	      }
+	      /**
+	       * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` if suitable for strict
+	       *  equality comparisons, else `false`.
+	       */
 
 
-	var ceil$1 = Math.ceil;
+	      function isStrictComparable(value) {
+	        return value === value && !isObject(value);
+	      }
+	      /**
+	       * A specialized version of `matchesProperty` for source values suitable
+	       * for strict equality comparisons, i.e. `===`.
+	       *
+	       * @private
+	       * @param {string} key The key of the property to get.
+	       * @param {*} srcValue The value to match.
+	       * @returns {Function} Returns the new spec function.
+	       */
 
-	// `String.prototype.{ padStart, padEnd }` methods implementation
-	var createMethod$6 = function (IS_END) {
-	  return function ($this, maxLength, fillString) {
-	    var S = String(requireObjectCoercible($this));
-	    var stringLength = S.length;
-	    var fillStr = fillString === undefined ? ' ' : String(fillString);
-	    var intMaxLength = toLength(maxLength);
-	    var fillLen, stringFiller;
-	    if (intMaxLength <= stringLength || fillStr == '') return S;
-	    fillLen = intMaxLength - stringLength;
-	    stringFiller = stringRepeat.call(fillStr, ceil$1(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.github.io/ecma262/#sec-string.prototype.padstart
-	  start: createMethod$6(false),
-	  // `String.prototype.padEnd` method
-	  // https://tc39.github.io/ecma262/#sec-string.prototype.padend
-	  end: createMethod$6(true)
-	};
+	      function matchesStrictComparable(key, srcValue) {
+	        return function (object) {
+	          if (object == null) {
+	            return false;
+	          }
 
-	var padStart = stringPad.start;
+	          return object[key] === srcValue && (srcValue !== undefined$1 || key in Object(object));
+	        };
+	      }
+	      /**
+	       * A specialized version of `_.memoize` which clears the memoized function's
+	       * cache when it exceeds `MAX_MEMOIZE_SIZE`.
+	       *
+	       * @private
+	       * @param {Function} func The function to have its output memoized.
+	       * @returns {Function} Returns the new memoized function.
+	       */
 
-	var abs$3 = Math.abs;
-	var DatePrototype$1 = Date.prototype;
-	var getTime$1 = DatePrototype$1.getTime;
-	var nativeDateToISOString = DatePrototype$1.toISOString;
 
-	// `Date.prototype.toISOString` method implementation
-	// https://tc39.github.io/ecma262/#sec-date.prototype.toisostring
-	// PhantomJS / old WebKit fails here:
-	var dateToIsoString = (fails(function () {
-	  return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
-	}) || !fails(function () {
-	  nativeDateToISOString.call(new Date(NaN));
-	})) ? function toISOString() {
-	  if (!isFinite(getTime$1.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$3(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;
+	      function memoizeCapped(func) {
+	        var result = memoize(func, function (key) {
+	          if (cache.size === MAX_MEMOIZE_SIZE) {
+	            cache.clear();
+	          }
 
-	// `Date.prototype.toISOString` method
-	// https://tc39.github.io/ecma262/#sec-date.prototype.toisostring
-	// PhantomJS / old WebKit has a broken implementations
-	_export({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== dateToIsoString }, {
-	  toISOString: dateToIsoString
-	});
+	          return key;
+	        });
+	        var cache = result.cache;
+	        return result;
+	      }
+	      /**
+	       * Merges the function metadata of `source` into `data`.
+	       *
+	       * Merging metadata reduces the number of wrappers used to invoke a function.
+	       * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
+	       * may be applied regardless of execution order. Methods like `_.ary` and
+	       * `_.rearg` modify function arguments, making the order in which they are
+	       * executed important, preventing the merging of metadata. However, we make
+	       * an exception for a safe combined case where curried functions have `_.ary`
+	       * and or `_.rearg` applied.
+	       *
+	       * @private
+	       * @param {Array} data The destination metadata.
+	       * @param {Array} source The source metadata.
+	       * @returns {Array} Returns `data`.
+	       */
 
-	function behaviorBreathe() {
-	  var duration = 800;
-	  var steps = 4;
-	  var selector = '.selected.shadow, .selected .shadow';
 
-	  var _selected = select(null);
+	      function mergeData(data, source) {
+	        var bitmask = data[1],
+	            srcBitmask = source[1],
+	            newBitmask = bitmask | srcBitmask,
+	            isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
+	        var isCombo = srcBitmask == WRAP_ARY_FLAG && bitmask == WRAP_CURRY_FLAG || srcBitmask == WRAP_ARY_FLAG && bitmask == WRAP_REARG_FLAG && data[7].length <= source[8] || srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG) && source[7].length <= source[8] && bitmask == WRAP_CURRY_FLAG; // Exit early if metadata can't be merged.
 
-	  var _classed = '';
-	  var _params = {};
-	  var _done = false;
+	        if (!(isCommon || isCombo)) {
+	          return data;
+	        } // Use source `thisArg` if available.
 
-	  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 || '');
-	    };
-	  }
+	        if (srcBitmask & WRAP_BIND_FLAG) {
+	          data[2] = source[2]; // Set when currying a bound function.
 
-	  function reset(selection) {
-	    selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
-	  }
+	          newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
+	        } // Compose partial arguments.
 
-	  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
+	        var value = source[3];
 
-	      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..
+	        if (value) {
+	          var partials = data[3];
+	          data[3] = partials ? composeArgs(partials, value, source[4]) : value;
+	          data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
+	        } // Compose partial right arguments.
 
 
-	      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;
-	    });
-	  }
+	        value = source[5];
 
-	  function run(surface, fromTo) {
-	    var toFrom = fromTo === 'from' ? 'to' : 'from';
-	    var currSelected = surface.selectAll(selector);
-	    var currClassed = surface.attr('class');
+	        if (value) {
+	          partials = data[5];
+	          data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
+	          data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
+	        } // Use source `argPos` if available.
 
-	    if (_done || currSelected.empty()) {
-	      _selected.call(reset);
 
-	      _selected = select(null);
-	      return;
-	    }
+	        value = source[7];
 
-	    if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-	      _selected.call(reset);
+	        if (value) {
+	          data[7] = value;
+	        } // Use source `ary` if it's smaller.
 
-	      _classed = currClassed;
-	      _selected = currSelected.call(calcAnimationParams);
-	    }
 
-	    var didCallNextRun = false;
+	        if (srcBitmask & WRAP_ARY_FLAG) {
+	          data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
+	        } // Use source `arity` if one is not provided.
 
-	    _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
 
+	        if (data[9] == null) {
+	          data[9] = source[9];
+	        } // Use source `func` and merge bitmasks.
 
-	      if (!select(this).classed('selected')) {
-	        reset(select(this));
-	      }
-	    });
-	  }
 
-	  function behavior(surface) {
-	    _done = false;
-	    _timer = timer(function () {
-	      // wait for elements to actually become selected
-	      if (surface.selectAll(selector).empty()) {
-	        return false;
+	        data[0] = source[0];
+	        data[1] = newBitmask;
+	        return data;
 	      }
+	      /**
+	       * This function is like
+	       * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+	       * except that it includes inherited enumerable properties.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	      surface.call(run, 'from');
 
-	      _timer.stop();
+	      function nativeKeysIn(object) {
+	        var result = [];
 
-	      return true;
-	    }, 20);
-	  }
+	        if (object != null) {
+	          for (var key in Object(object)) {
+	            result.push(key);
+	          }
+	        }
 
-	  behavior.restartIfNeeded = function (surface) {
-	    if (_selected.empty()) {
-	      surface.call(run, 'from');
+	        return result;
+	      }
+	      /**
+	       * Converts `value` to a string using `Object.prototype.toString`.
+	       *
+	       * @private
+	       * @param {*} value The value to convert.
+	       * @returns {string} Returns the converted string.
+	       */
 
-	      if (_timer) {
-	        _timer.stop();
+
+	      function objectToString(value) {
+	        return nativeObjectToString.call(value);
 	      }
-	    }
-	  };
+	      /**
+	       * A specialized version of `baseRest` which transforms the rest array.
+	       *
+	       * @private
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @param {number} [start=func.length-1] The start position of the rest parameter.
+	       * @param {Function} transform The rest array transform.
+	       * @returns {Function} Returns the new function.
+	       */
 
-	  behavior.off = function () {
-	    _done = true;
 
-	    if (_timer) {
-	      _timer.stop();
-	    }
+	      function overRest(func, start, transform) {
+	        start = nativeMax(start === undefined$1 ? func.length - 1 : start, 0);
+	        return function () {
+	          var args = arguments,
+	              index = -1,
+	              length = nativeMax(args.length - start, 0),
+	              array = Array(length);
 
-	    _selected.interrupt().call(reset);
-	  };
+	          while (++index < length) {
+	            array[index] = args[start + index];
+	          }
 
-	  return behavior;
-	}
+	          index = -1;
+	          var otherArgs = Array(start + 1);
 
-	/* Creates a keybinding behavior for an operation */
-	function behaviorOperation(context) {
-	  var _operation;
+	          while (++index < start) {
+	            otherArgs[index] = args[index];
+	          }
 
-	  function keypress(d3_event) {
-	    // prevent operations during low zoom selection
-	    if (!context.map().withinEditableZoom()) return;
-	    if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
-	    d3_event.preventDefault();
+	          otherArgs[start] = transform(array);
+	          return apply(func, this, otherArgs);
+	        };
+	      }
+	      /**
+	       * Gets the parent value at `path` of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array} path The path to get the parent value of.
+	       * @returns {*} Returns the parent value.
+	       */
 
-	    var disabled = _operation.disabled();
 
-	    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);
+	      function parent(object, path) {
+	        return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
+	      }
+	      /**
+	       * Reorder `array` according to the specified indexes where the element at
+	       * the first index is assigned as the first element, the element at
+	       * the second index is assigned as the second element, and so on.
+	       *
+	       * @private
+	       * @param {Array} array The array to reorder.
+	       * @param {Array} indexes The arranged array indexes.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	      _operation();
-	    }
-	  }
 
-	  function behavior() {
-	    if (_operation && _operation.available()) {
-	      context.keybinding().on(_operation.keys, keypress);
-	    }
+	      function reorder(array, indexes) {
+	        var arrLength = array.length,
+	            length = nativeMin(indexes.length, arrLength),
+	            oldArray = copyArray(array);
 
-	    return behavior;
-	  }
+	        while (length--) {
+	          var index = indexes[length];
+	          array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined$1;
+	        }
 
-	  behavior.off = function () {
-	    context.keybinding().off(_operation.keys);
-	  };
+	        return array;
+	      }
+	      /**
+	       * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {string} key The key of the property to get.
+	       * @returns {*} Returns the property value.
+	       */
 
-	  behavior.which = function (_) {
-	    if (!arguments.length) return _operation;
-	    _operation = _;
-	    return behavior;
-	  };
 
-	  return behavior;
-	}
+	      function safeGet(object, key) {
+	        if (key === 'constructor' && typeof object[key] === 'function') {
+	          return;
+	        }
 
-	function operationCircularize(context, selectedIDs) {
-	  var _extent;
+	        if (key == '__proto__') {
+	          return;
+	        }
 
-	  var _actions = selectedIDs.map(getAction).filter(Boolean);
+	        return object[key];
+	      }
+	      /**
+	       * Sets metadata for `func`.
+	       *
+	       * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
+	       * period of time, it will trip its breaker and transition to an identity
+	       * function to avoid garbage collection pauses in V8. See
+	       * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
+	       * for more details.
+	       *
+	       * @private
+	       * @param {Function} func The function to associate metadata with.
+	       * @param {*} data The metadata.
+	       * @returns {Function} Returns `func`.
+	       */
 
-	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-	    return n.loc;
-	  });
+	      var setData = shortOut(baseSetData);
+	      /**
+	       * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
+	       *
+	       * @private
+	       * @param {Function} func The function to delay.
+	       * @param {number} wait The number of milliseconds to delay invocation.
+	       * @returns {number|Object} Returns the timer id or timeout object.
+	       */
 
-	  function getAction(entityID) {
-	    var entity = context.entity(entityID);
-	    if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
+	      var setTimeout = ctxSetTimeout || function (func, wait) {
+	        return root.setTimeout(func, wait);
+	      };
+	      /**
+	       * Sets the `toString` method of `func` to return `string`.
+	       *
+	       * @private
+	       * @param {Function} func The function to modify.
+	       * @param {Function} string The `toString` result.
+	       * @returns {Function} Returns `func`.
+	       */
 
-	    if (!_extent) {
-	      _extent = entity.extent(context.graph());
-	    } else {
-	      _extent = _extent.extend(entity.extent(context.graph()));
-	    }
 
-	    return actionCircularize(entityID, context.projection);
-	  }
+	      var setToString = shortOut(baseSetToString);
+	      /**
+	       * Sets the `toString` method of `wrapper` to mimic the source of `reference`
+	       * with wrapper details in a comment at the top of the source body.
+	       *
+	       * @private
+	       * @param {Function} wrapper The function to modify.
+	       * @param {Function} reference The reference function.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @returns {Function} Returns `wrapper`.
+	       */
 
-	  var operation = function operation() {
-	    if (!_actions.length) return;
+	      function setWrapToString(wrapper, reference, bitmask) {
+	        var source = reference + '';
+	        return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
+	      }
+	      /**
+	       * Creates a function that'll short out and invoke `identity` instead
+	       * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+	       * milliseconds.
+	       *
+	       * @private
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new shortable function.
+	       */
 
-	    var combinedAction = function combinedAction(graph, t) {
-	      _actions.forEach(function (action) {
-	        if (!action.disabled(graph)) {
-	          graph = action(graph, t);
-	        }
-	      });
 
-	      return graph;
-	    };
+	      function shortOut(func) {
+	        var count = 0,
+	            lastCalled = 0;
+	        return function () {
+	          var stamp = nativeNow(),
+	              remaining = HOT_SPAN - (stamp - lastCalled);
+	          lastCalled = stamp;
 
-	    combinedAction.transitionable = true;
-	    context.perform(combinedAction, operation.annotation());
-	    window.setTimeout(function () {
-	      context.validator().validate();
-	    }, 300); // after any transition
-	  };
+	          if (remaining > 0) {
+	            if (++count >= HOT_COUNT) {
+	              return arguments[0];
+	            }
+	          } else {
+	            count = 0;
+	          }
 
-	  operation.available = function () {
-	    return _actions.length && selectedIDs.length === _actions.length;
-	  }; // don't cache this because the visible extent could change
+	          return func.apply(undefined$1, arguments);
+	        };
+	      }
+	      /**
+	       * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
+	       *
+	       * @private
+	       * @param {Array} array The array to shuffle.
+	       * @param {number} [size=array.length] The size of `array`.
+	       * @returns {Array} Returns `array`.
+	       */
 
 
-	  operation.disabled = function () {
-	    if (!_actions.length) return '';
+	      function shuffleSelf(array, size) {
+	        var index = -1,
+	            length = array.length,
+	            lastIndex = length - 1;
+	        size = size === undefined$1 ? length : size;
 
-	    var actionDisableds = _actions.map(function (action) {
-	      return action.disabled(context.graph());
-	    }).filter(Boolean);
+	        while (++index < size) {
+	          var rand = baseRandom(index, lastIndex),
+	              value = array[rand];
+	          array[rand] = array[index];
+	          array[index] = value;
+	        }
 
-	    if (actionDisableds.length === _actions.length) {
-	      // none of the features can be circularized
-	      if (new Set(actionDisableds).size > 1) {
-	        return 'multiple_blockers';
+	        array.length = size;
+	        return array;
 	      }
+	      /**
+	       * Converts `string` to a property path array.
+	       *
+	       * @private
+	       * @param {string} string The string to convert.
+	       * @returns {Array} Returns the property path array.
+	       */
 
-	      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';
-	    }
 
-	    return false;
+	      var stringToPath = memoizeCapped(function (string) {
+	        var result = [];
 
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
+	        if (string.charCodeAt(0) === 46
+	        /* . */
+	        ) {
+	          result.push('');
+	        }
 
-	      if (osm) {
-	        var missing = _coords.filter(function (loc) {
-	          return !osm.isDataLoaded(loc);
+	        string.replace(rePropName, function (match, number, quote, subString) {
+	          result.push(quote ? subString.replace(reEscapeChar, '$1') : number || match);
 	        });
+	        return result;
+	      });
+	      /**
+	       * Converts `value` to a string key if it's not a string or symbol.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @returns {string|symbol} Returns the key.
+	       */
 
-	        if (missing.length) {
-	          missing.forEach(function (loc) {
-	            context.loadTileAtLoc(loc);
-	          });
-	          return true;
+	      function toKey(value) {
+	        if (typeof value == 'string' || isSymbol(value)) {
+	          return value;
 	        }
+
+	        var result = value + '';
+	        return result == '0' && 1 / value == -INFINITY ? '-0' : result;
 	      }
+	      /**
+	       * Converts `func` to its source code.
+	       *
+	       * @private
+	       * @param {Function} func The function to convert.
+	       * @returns {string} Returns the source code.
+	       */
 
-	      return false;
-	    }
-	  };
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
-	  };
+	      function toSource(func) {
+	        if (func != null) {
+	          try {
+	            return funcToString.call(func);
+	          } catch (e) {}
 
-	  operation.annotation = function () {
-	    return _t('operations.circularize.annotation.feature', {
-	      n: _actions.length
-	    });
-	  };
+	          try {
+	            return func + '';
+	          } catch (e) {}
+	        }
 
-	  operation.id = 'circularize';
-	  operation.keys = [_t('operations.circularize.key')];
-	  operation.title = _t('operations.circularize.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	        return '';
+	      }
+	      /**
+	       * Updates wrapper `details` based on `bitmask` flags.
+	       *
+	       * @private
+	       * @returns {Array} details The details to modify.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @returns {Array} Returns `details`.
+	       */
 
-	// For example, ⌘Z -> Ctrl+Z
 
-	var uiCmd = function uiCmd(code) {
-	  var detected = utilDetect();
+	      function updateWrapDetails(details, bitmask) {
+	        arrayEach(wrapFlags, function (pair) {
+	          var value = '_.' + pair[0];
 
-	  if (detected.os === 'mac') {
-	    return code;
-	  }
+	          if (bitmask & pair[1] && !arrayIncludes(details, value)) {
+	            details.push(value);
+	          }
+	        });
+	        return details.sort();
+	      }
+	      /**
+	       * Creates a clone of `wrapper`.
+	       *
+	       * @private
+	       * @param {Object} wrapper The wrapper to clone.
+	       * @returns {Object} Returns the cloned wrapper.
+	       */
 
-	  if (detected.os === 'win') {
-	    if (code === '⌘⇧Z') return 'Ctrl+Y';
-	  }
 
-	  var result = '',
-	      replacements = {
-	    '⌘': 'Ctrl',
-	    '⇧': 'Shift',
-	    '⌥': 'Alt',
-	    '⌫': 'Backspace',
-	    '⌦': 'Delete'
-	  };
+	      function wrapperClone(wrapper) {
+	        if (wrapper instanceof LazyWrapper) {
+	          return wrapper.clone();
+	        }
 
-	  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];
-	    }
-	  }
+	        var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
+	        result.__actions__ = copyArray(wrapper.__actions__);
+	        result.__index__ = wrapper.__index__;
+	        result.__values__ = wrapper.__values__;
+	        return result;
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	  return result;
-	}; // return a display-focused string for a given keyboard code
+	      /**
+	       * Creates an array of elements split into groups the length of `size`.
+	       * If `array` can't be split evenly, the final chunk will be the remaining
+	       * elements.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to process.
+	       * @param {number} [size=1] The length of each chunk
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the new array of chunks.
+	       * @example
+	       *
+	       * _.chunk(['a', 'b', 'c', 'd'], 2);
+	       * // => [['a', 'b'], ['c', 'd']]
+	       *
+	       * _.chunk(['a', 'b', 'c', 'd'], 3);
+	       * // => [['a', 'b', 'c'], ['d']]
+	       */
 
-	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;
-	};
 
-	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 chunk(array, size, guard) {
+	        if (guard ? isIterateeCall(array, size, guard) : size === undefined$1) {
+	          size = 1;
+	        } else {
+	          size = nativeMax(toInteger(size), 0);
+	        }
 
-	  var operation = function operation() {
-	    var nextSelectedID;
-	    var nextSelectedLoc;
+	        var length = array == null ? 0 : array.length;
 
-	    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 (!length || size < 1) {
+	          return [];
+	        }
 
-	      if (geometry === 'vertex') {
-	        var nodes = parent.nodes;
-	        var i = nodes.indexOf(id);
+	        var index = 0,
+	            resIndex = 0,
+	            result = Array(nativeCeil(length / size));
 
-	        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;
+	        while (index < length) {
+	          result[resIndex++] = baseSlice(array, index, index += size);
 	        }
 
-	        nextSelectedID = nodes[i];
-	        nextSelectedLoc = context.entity(nextSelectedID).loc;
+	        return result;
 	      }
-	    }
+	      /**
+	       * Creates an array with all falsey values removed. The values `false`, `null`,
+	       * `0`, `""`, `undefined`, and `NaN` are falsey.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to compact.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * _.compact([0, 1, false, 2, '', 3]);
+	       * // => [1, 2, 3]
+	       */
 
-	    context.perform(action, operation.annotation());
-	    context.validator().validate();
 
-	    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));
-	    }
-	  };
+	      function compact(array) {
+	        var index = -1,
+	            length = array == null ? 0 : array.length,
+	            resIndex = 0,
+	            result = [];
 
-	  operation.available = function () {
-	    return true;
-	  };
+	        while (++index < length) {
+	          var value = array[index];
 
-	  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';
-	    }
+	          if (value) {
+	            result[resIndex++] = value;
+	          }
+	        }
 
-	    return false;
+	        return result;
+	      }
+	      /**
+	       * Creates a new array concatenating `array` with any additional arrays
+	       * and/or values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to concatenate.
+	       * @param {...*} [values] The values to concatenate.
+	       * @returns {Array} Returns the new concatenated array.
+	       * @example
+	       *
+	       * var array = [1];
+	       * var other = _.concat(array, 2, [3], [[4]]);
+	       *
+	       * console.log(other);
+	       * // => [1, 2, 3, [4]]
+	       *
+	       * console.log(array);
+	       * // => [1]
+	       */
 
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
 
-	      if (osm) {
-	        var missing = coords.filter(function (loc) {
-	          return !osm.isDataLoaded(loc);
-	        });
+	      function concat() {
+	        var length = arguments.length;
 
-	        if (missing.length) {
-	          missing.forEach(function (loc) {
-	            context.loadTileAtLoc(loc);
-	          });
-	          return true;
+	        if (!length) {
+	          return [];
 	        }
+
+	        var args = Array(length - 1),
+	            array = arguments[0],
+	            index = length;
+
+	        while (index--) {
+	          args[index - 1] = arguments[index];
+	        }
+
+	        return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
 	      }
+	      /**
+	       * Creates an array of `array` values not included in the other given arrays
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons. The order and references of result values are
+	       * determined by the first array.
+	       *
+	       * **Note:** Unlike `_.pullAll`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...Array} [values] The values to exclude.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @see _.without, _.xor
+	       * @example
+	       *
+	       * _.difference([2, 1], [2, 3]);
+	       * // => [1]
+	       */
 
-	      return false;
-	    }
 
-	    function hasWikidataTag(id) {
-	      var entity = context.entity(id);
-	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	    }
+	      var difference = baseRest(function (array, values) {
+	        return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true)) : [];
+	      });
+	      /**
+	       * This method is like `_.difference` except that it accepts `iteratee` which
+	       * is invoked for each element of `array` and `values` to generate the criterion
+	       * by which they're compared. The order and references of result values are
+	       * determined by the first array. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...Array} [values] The values to exclude.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+	       * // => [1.2]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
+	       * // => [{ 'x': 2 }]
+	       */
 
-	    function incompleteRelation(id) {
-	      var entity = context.entity(id);
-	      return entity.type === 'relation' && !entity.isComplete(context.graph());
-	    }
+	      var differenceBy = baseRest(function (array, values) {
+	        var iteratee = last(values);
 
-	    function protectedMember(id) {
-	      var entity = context.entity(id);
-	      if (entity.type !== 'way') return false;
-	      var parents = context.graph().parentRelations(entity);
+	        if (isArrayLikeObject(iteratee)) {
+	          iteratee = undefined$1;
+	        }
 
-	      for (var i = 0; i < parents.length; i++) {
-	        var parent = parents[i];
-	        var type = parent.tags.type;
-	        var role = parent.memberById(id).role || 'outer';
+	        return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)) : [];
+	      });
+	      /**
+	       * This method is like `_.difference` except that it accepts `comparator`
+	       * which is invoked to compare elements of `array` to `values`. The order and
+	       * references of result values are determined by the first array. The comparator
+	       * is invoked with two arguments: (arrVal, othVal).
+	       *
+	       * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...Array} [values] The values to exclude.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       *
+	       * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
+	       * // => [{ 'x': 2, 'y': 1 }]
+	       */
 
-	        if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
-	          return true;
+	      var differenceWith = baseRest(function (array, values) {
+	        var comparator = last(values);
+
+	        if (isArrayLikeObject(comparator)) {
+	          comparator = undefined$1;
+	        }
+
+	        return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined$1, comparator) : [];
+	      });
+	      /**
+	       * Creates a slice of `array` with `n` elements dropped from the beginning.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.5.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to drop.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.drop([1, 2, 3]);
+	       * // => [2, 3]
+	       *
+	       * _.drop([1, 2, 3], 2);
+	       * // => [3]
+	       *
+	       * _.drop([1, 2, 3], 5);
+	       * // => []
+	       *
+	       * _.drop([1, 2, 3], 0);
+	       * // => [1, 2, 3]
+	       */
+
+	      function drop(array, n, guard) {
+	        var length = array == null ? 0 : array.length;
+
+	        if (!length) {
+	          return [];
 	        }
+
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        return baseSlice(array, n < 0 ? 0 : n, length);
 	      }
+	      /**
+	       * Creates a slice of `array` with `n` elements dropped from the end.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to drop.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.dropRight([1, 2, 3]);
+	       * // => [1, 2]
+	       *
+	       * _.dropRight([1, 2, 3], 2);
+	       * // => [1]
+	       *
+	       * _.dropRight([1, 2, 3], 5);
+	       * // => []
+	       *
+	       * _.dropRight([1, 2, 3], 0);
+	       * // => [1, 2, 3]
+	       */
 
-	      return false;
-	    }
-	  };
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
-	  };
+	      function dropRight(array, n, guard) {
+	        var length = array == null ? 0 : array.length;
 
-	  operation.annotation = function () {
-	    return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
-	      n: selectedIDs.length
-	    });
-	  };
+	        if (!length) {
+	          return [];
+	        }
 
-	  operation.id = 'delete';
-	  operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	  operation.title = _t('operations.delete.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        n = length - n;
+	        return baseSlice(array, 0, n < 0 ? 0 : n);
+	      }
+	      /**
+	       * Creates a slice of `array` excluding elements dropped from the end.
+	       * Elements are dropped until `predicate` returns falsey. The predicate is
+	       * invoked with three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': true },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': false }
+	       * ];
+	       *
+	       * _.dropRightWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
+	       * // => objects for ['barney', 'fred']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.dropRightWhile(users, ['active', false]);
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.dropRightWhile(users, 'active');
+	       * // => objects for ['barney', 'fred', 'pebbles']
+	       */
 
-	function operationOrthogonalize(context, selectedIDs) {
-	  var _extent;
 
-	  var _type;
+	      function dropRightWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3), true, true) : [];
+	      }
+	      /**
+	       * Creates a slice of `array` excluding elements dropped from the beginning.
+	       * Elements are dropped until `predicate` returns falsey. The predicate is
+	       * invoked with three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': false },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': true }
+	       * ];
+	       *
+	       * _.dropWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['pebbles']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.dropWhile(users, { 'user': 'barney', 'active': false });
+	       * // => objects for ['fred', 'pebbles']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.dropWhile(users, ['active', false]);
+	       * // => objects for ['pebbles']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.dropWhile(users, 'active');
+	       * // => objects for ['barney', 'fred', 'pebbles']
+	       */
 
-	  var _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
+	      function dropWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3), true) : [];
+	      }
+	      /**
+	       * Fills elements of `array` with `value` from `start` up to, but not
+	       * including, `end`.
+	       *
+	       * **Note:** This method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Array
+	       * @param {Array} array The array to fill.
+	       * @param {*} value The value to fill `array` with.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [1, 2, 3];
+	       *
+	       * _.fill(array, 'a');
+	       * console.log(array);
+	       * // => ['a', 'a', 'a']
+	       *
+	       * _.fill(Array(3), 2);
+	       * // => [2, 2, 2]
+	       *
+	       * _.fill([4, 6, 8, 10], '*', 1, 3);
+	       * // => [4, '*', '*', 10]
+	       */
 
-	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-	    return n.loc;
-	  });
 
-	  function chooseAction(entityID) {
-	    var entity = context.entity(entityID);
-	    var geometry = entity.geometry(context.graph());
+	      function fill(array, value, start, end) {
+	        var length = array == null ? 0 : array.length;
 
-	    if (!_extent) {
-	      _extent = entity.extent(context.graph());
-	    } else {
-	      _extent = _extent.extend(entity.extent(context.graph()));
-	    } // square a line/area
+	        if (!length) {
+	          return [];
+	        }
 
+	        if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+	          start = 0;
+	          end = length;
+	        }
 
-	    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);
+	        return baseFill(array, value, start, end);
+	      }
+	      /**
+	       * This method is like `_.find` except that it returns the index of the first
+	       * element `predicate` returns truthy for instead of the element itself.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @returns {number} Returns the index of the found element, else `-1`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': false },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': true }
+	       * ];
+	       *
+	       * _.findIndex(users, function(o) { return o.user == 'barney'; });
+	       * // => 0
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findIndex(users, { 'user': 'fred', 'active': false });
+	       * // => 1
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findIndex(users, ['active', false]);
+	       * // => 0
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findIndex(users, 'active');
+	       * // => 2
+	       */
 
-	      if (parents.length === 1) {
-	        var way = parents[0];
 
-	        if (way.nodes.indexOf(entityID) !== -1) {
-	          return actionOrthogonalize(way.id, context.projection, entityID);
-	        }
-	      }
-	    }
+	      function findIndex(array, predicate, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
-	    return null;
-	  }
+	        if (!length) {
+	          return -1;
+	        }
 
-	  var operation = function operation() {
-	    if (!_actions.length) return;
+	        var index = fromIndex == null ? 0 : toInteger(fromIndex);
 
-	    var combinedAction = function combinedAction(graph, t) {
-	      _actions.forEach(function (action) {
-	        if (!action.disabled(graph)) {
-	          graph = action(graph, t);
+	        if (index < 0) {
+	          index = nativeMax(length + index, 0);
 	        }
-	      });
 
-	      return graph;
-	    };
+	        return baseFindIndex(array, getIteratee(predicate, 3), index);
+	      }
+	      /**
+	       * This method is like `_.findIndex` except that it iterates over elements
+	       * of `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=array.length-1] The index to search from.
+	       * @returns {number} Returns the index of the found element, else `-1`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': true },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': false }
+	       * ];
+	       *
+	       * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
+	       * // => 2
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findLastIndex(users, { 'user': 'barney', 'active': true });
+	       * // => 0
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findLastIndex(users, ['active', false]);
+	       * // => 2
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findLastIndex(users, 'active');
+	       * // => 0
+	       */
 
-	    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 findLastIndex(array, predicate, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
+	        if (!length) {
+	          return -1;
+	        }
 
-	  operation.disabled = function () {
-	    if (!_actions.length) return '';
+	        var index = length - 1;
 
-	    var actionDisableds = _actions.map(function (action) {
-	      return action.disabled(context.graph());
-	    }).filter(Boolean);
+	        if (fromIndex !== undefined$1) {
+	          index = toInteger(fromIndex);
+	          index = fromIndex < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+	        }
 
-	    if (actionDisableds.length === _actions.length) {
-	      // none of the features can be squared
-	      if (new Set(actionDisableds).size > 1) {
-	        return 'multiple_blockers';
+	        return baseFindIndex(array, getIteratee(predicate, 3), index, true);
 	      }
+	      /**
+	       * Flattens `array` a single level deep.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to flatten.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * _.flatten([1, [2, [3, [4]], 5]]);
+	       * // => [1, 2, [3, [4]], 5]
+	       */
 
-	      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';
-	    }
-
-	    return false;
 
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
+	      function flatten(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseFlatten(array, 1) : [];
+	      }
+	      /**
+	       * Recursively flattens `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to flatten.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * _.flattenDeep([1, [2, [3, [4]], 5]]);
+	       * // => [1, 2, 3, 4, 5]
+	       */
 
-	      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 flattenDeep(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseFlatten(array, INFINITY) : [];
 	      }
+	      /**
+	       * Recursively flatten `array` up to `depth` times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.4.0
+	       * @category Array
+	       * @param {Array} array The array to flatten.
+	       * @param {number} [depth=1] The maximum recursion depth.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * var array = [1, [2, [3, [4]], 5]];
+	       *
+	       * _.flattenDepth(array, 1);
+	       * // => [1, 2, [3, [4]], 5]
+	       *
+	       * _.flattenDepth(array, 2);
+	       * // => [1, 2, 3, [4], 5]
+	       */
 
-	      return false;
-	    }
-	  };
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-	  };
+	      function flattenDepth(array, depth) {
+	        var length = array == null ? 0 : array.length;
 
-	  operation.annotation = function () {
-	    return _t('operations.orthogonalize.annotation.' + _type, {
-	      n: _actions.length
-	    });
-	  };
+	        if (!length) {
+	          return [];
+	        }
 
-	  operation.id = 'orthogonalize';
-	  operation.keys = [_t('operations.orthogonalize.key')];
-	  operation.title = _t('operations.orthogonalize.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	        depth = depth === undefined$1 ? 1 : toInteger(depth);
+	        return baseFlatten(array, depth);
+	      }
+	      /**
+	       * The inverse of `_.toPairs`; this method returns an object composed
+	       * from key-value `pairs`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} pairs The key-value pairs.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * _.fromPairs([['a', 1], ['b', 2]]);
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	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());
 
-	  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
-	  };
+	      function fromPairs(pairs) {
+	        var index = -1,
+	            length = pairs == null ? 0 : pairs.length,
+	            result = {};
 
-	  operation.available = function () {
-	    return nodes.length >= 3;
-	  }; // don't cache this because the visible extent could change
+	        while (++index < length) {
+	          var pair = pairs[index];
+	          result[pair[0]] = pair[1];
+	        }
 
+	        return result;
+	      }
+	      /**
+	       * Gets the first element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @alias first
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {*} Returns the first element of `array`.
+	       * @example
+	       *
+	       * _.head([1, 2, 3]);
+	       * // => 1
+	       *
+	       * _.head([]);
+	       * // => undefined
+	       */
 
-	  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;
+	      function head(array) {
+	        return array && array.length ? array[0] : undefined$1;
+	      }
+	      /**
+	       * Gets the index at which the first occurrence of `value` is found in `array`
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons. If `fromIndex` is negative, it's used as the
+	       * offset from the end of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.indexOf([1, 2, 1, 2], 2);
+	       * // => 1
+	       *
+	       * // Search from the `fromIndex`.
+	       * _.indexOf([1, 2, 1, 2], 2, 2);
+	       * // => 3
+	       */
 
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
 
-	      if (osm) {
-	        var missing = coords.filter(function (loc) {
-	          return !osm.isDataLoaded(loc);
-	        });
+	      function indexOf(array, value, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
-	        if (missing.length) {
-	          missing.forEach(function (loc) {
-	            context.loadTileAtLoc(loc);
-	          });
-	          return true;
+	        if (!length) {
+	          return -1;
+	        }
+
+	        var index = fromIndex == null ? 0 : toInteger(fromIndex);
+
+	        if (index < 0) {
+	          index = nativeMax(length + index, 0);
 	        }
+
+	        return baseIndexOf(array, value, index);
 	      }
+	      /**
+	       * Gets all but the last element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.initial([1, 2, 3]);
+	       * // => [1, 2]
+	       */
 
-	      return false;
-	    }
 
-	    function incompleteRelation(id) {
-	      var entity = context.entity(id);
-	      return entity.type === 'relation' && !entity.isComplete(context.graph());
-	    }
-	  };
+	      function initial(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseSlice(array, 0, -1) : [];
+	      }
+	      /**
+	       * Creates an array of unique values that are included in all given arrays
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons. The order and references of result values are
+	       * determined by the first array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @returns {Array} Returns the new array of intersecting values.
+	       * @example
+	       *
+	       * _.intersection([2, 1], [2, 3]);
+	       * // => [2]
+	       */
 
-	  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
-	    });
-	  };
+	      var intersection = baseRest(function (arrays) {
+	        var mapped = arrayMap(arrays, castArrayLikeObject);
+	        return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped) : [];
+	      });
+	      /**
+	       * This method is like `_.intersection` except that it accepts `iteratee`
+	       * which is invoked for each element of each `arrays` to generate the criterion
+	       * by which they're compared. The order and references of result values are
+	       * determined by the first array. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of intersecting values.
+	       * @example
+	       *
+	       * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+	       * // => [2.1]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 1 }]
+	       */
 
-	  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;
-	}
+	      var intersectionBy = baseRest(function (arrays) {
+	        var iteratee = last(arrays),
+	            mapped = arrayMap(arrays, castArrayLikeObject);
 
-	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 (iteratee === last(mapped)) {
+	          iteratee = undefined$1;
+	        } else {
+	          mapped.pop();
+	        }
 
-	  var operation = function operation() {
-	    context.enter(modeMove(context, selectedIDs));
-	  };
+	        return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped, getIteratee(iteratee, 2)) : [];
+	      });
+	      /**
+	       * This method is like `_.intersection` except that it accepts `comparator`
+	       * which is invoked to compare elements of `arrays`. The order and references
+	       * of result values are determined by the first array. The comparator is
+	       * invoked with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of intersecting values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.intersectionWith(objects, others, _.isEqual);
+	       * // => [{ 'x': 1, 'y': 2 }]
+	       */
 
-	  operation.available = function () {
-	    return selectedIDs.length > 1 || context.entity(selectedIDs[0]).type !== 'node';
-	  };
+	      var intersectionWith = baseRest(function (arrays) {
+	        var comparator = last(arrays),
+	            mapped = arrayMap(arrays, castArrayLikeObject);
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
 
-	  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';
-	    }
+	        if (comparator) {
+	          mapped.pop();
+	        }
 
-	    return false;
+	        return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped, undefined$1, comparator) : [];
+	      });
+	      /**
+	       * Converts all elements in `array` into a string separated by `separator`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to convert.
+	       * @param {string} [separator=','] The element separator.
+	       * @returns {string} Returns the joined string.
+	       * @example
+	       *
+	       * _.join(['a', 'b', 'c'], '~');
+	       * // => 'a~b~c'
+	       */
 
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
+	      function join(array, separator) {
+	        return array == null ? '' : nativeJoin.call(array, separator);
+	      }
+	      /**
+	       * Gets the last element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {*} Returns the last element of `array`.
+	       * @example
+	       *
+	       * _.last([1, 2, 3]);
+	       * // => 3
+	       */
 
-	      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 last(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? array[length - 1] : undefined$1;
 	      }
+	      /**
+	       * This method is like `_.indexOf` except that it iterates over elements of
+	       * `array` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @param {number} [fromIndex=array.length-1] The index to search from.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.lastIndexOf([1, 2, 1, 2], 2);
+	       * // => 3
+	       *
+	       * // Search from the `fromIndex`.
+	       * _.lastIndexOf([1, 2, 1, 2], 2, 2);
+	       * // => 1
+	       */
 
-	      return false;
-	    }
 
-	    function incompleteRelation(id) {
-	      var entity = context.entity(id);
-	      return entity.type === 'relation' && !entity.isComplete(context.graph());
-	    }
-	  };
+	      function lastIndexOf(array, value, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
-	  };
+	        if (!length) {
+	          return -1;
+	        }
 
-	  operation.annotation = function () {
-	    return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
-	      n: selectedIDs.length
-	    });
-	  };
+	        var index = 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;
-	}
+	        if (fromIndex !== undefined$1) {
+	          index = toInteger(fromIndex);
+	          index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+	        }
 
-	function modeRotate(context, entityIDs) {
-	  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 === value ? strictLastIndexOf(array, value, index) : baseFindIndex(array, baseIsNaN, index, true);
+	      }
+	      /**
+	       * Gets the element at index `n` of `array`. If `n` is negative, the nth
+	       * element from the end is returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.11.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=0] The index of the element to return.
+	       * @returns {*} Returns the nth element of `array`.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'd'];
+	       *
+	       * _.nth(array, 1);
+	       * // => 'b'
+	       *
+	       * _.nth(array, -2);
+	       * // => 'c';
+	       */
 
-	  var _prevGraph;
 
-	  var _prevAngle;
+	      function nth(array, n) {
+	        return array && array.length ? baseNth(array, toInteger(n)) : undefined$1;
+	      }
+	      /**
+	       * Removes all given values from `array` using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
+	       * to remove elements from an array by predicate.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {...*} [values] The values to remove.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+	       *
+	       * _.pull(array, 'a', 'c');
+	       * console.log(array);
+	       * // => ['b', 'b']
+	       */
 
-	  var _prevTransform;
 
-	  var _pivot;
+	      var pull = baseRest(pullAll);
+	      /**
+	       * This method is like `_.pull` except that it accepts an array of values to remove.
+	       *
+	       * **Note:** Unlike `_.difference`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+	       *
+	       * _.pullAll(array, ['a', 'c']);
+	       * console.log(array);
+	       * // => ['b', 'b']
+	       */
 
-	  function doRotate() {
-	    var fn;
+	      function pullAll(array, values) {
+	        return array && array.length && values && values.length ? basePullAll(array, values) : array;
+	      }
+	      /**
+	       * This method is like `_.pullAll` except that it accepts `iteratee` which is
+	       * invoked for each element of `array` and `values` to generate the criterion
+	       * by which they're compared. The iteratee is invoked with one argument: (value).
+	       *
+	       * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
+	       *
+	       * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
+	       * console.log(array);
+	       * // => [{ 'x': 2 }]
+	       */
 
-	    if (context.graph() !== _prevGraph) {
-	      fn = context.perform;
-	    } else {
-	      fn = context.replace;
-	    } // projection changed, recalculate _pivot
 
+	      function pullAllBy(array, values, iteratee) {
+	        return array && array.length && values && values.length ? basePullAll(array, values, getIteratee(iteratee, 2)) : array;
+	      }
+	      /**
+	       * This method is like `_.pullAll` except that it accepts `comparator` which
+	       * is invoked to compare elements of `array` to `values`. The comparator is
+	       * invoked with two arguments: (arrVal, othVal).
+	       *
+	       * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.6.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
+	       *
+	       * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
+	       * console.log(array);
+	       * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
+	       */
 
-	    var projection = context.projection;
-	    var currTransform = projection.transform();
 
-	    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;
-	    }
+	      function pullAllWith(array, values, comparator) {
+	        return array && array.length && values && values.length ? basePullAll(array, values, undefined$1, comparator) : array;
+	      }
+	      /**
+	       * Removes elements from `array` corresponding to `indexes` and returns an
+	       * array of removed elements.
+	       *
+	       * **Note:** Unlike `_.at`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {...(number|number[])} [indexes] The indexes of elements to remove.
+	       * @returns {Array} Returns the new array of removed elements.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'd'];
+	       * var pulled = _.pullAt(array, [1, 3]);
+	       *
+	       * console.log(array);
+	       * // => ['a', 'c']
+	       *
+	       * console.log(pulled);
+	       * // => ['b', 'd']
+	       */
 
-	    var currMouse = context.map().mouse();
-	    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();
-	  }
 
-	  function getPivot(points) {
-	    var _pivot;
+	      var pullAt = flatRest(function (array, indexes) {
+	        var length = array == null ? 0 : array.length,
+	            result = baseAt(array, indexes);
+	        basePullAt(array, arrayMap(indexes, function (index) {
+	          return isIndex(index, length) ? +index : index;
+	        }).sort(compareAscending));
+	        return result;
+	      });
+	      /**
+	       * Removes all elements from `array` that `predicate` returns truthy for
+	       * and returns an array of the removed elements. The predicate is invoked
+	       * with three arguments: (value, index, array).
+	       *
+	       * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
+	       * to pull elements from an array by value.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new array of removed elements.
+	       * @example
+	       *
+	       * var array = [1, 2, 3, 4];
+	       * var evens = _.remove(array, function(n) {
+	       *   return n % 2 == 0;
+	       * });
+	       *
+	       * console.log(array);
+	       * // => [1, 3]
+	       *
+	       * console.log(evens);
+	       * // => [2, 4]
+	       */
 
-	    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);
+	      function remove(array, predicate) {
+	        var result = [];
 
-	      if (polygonHull.length === 2) {
-	        _pivot = geoVecInterp(points[0], points[1], 0.5);
-	      } else {
-	        _pivot = d3_polygonCentroid(d3_polygonHull(points));
-	      }
-	    }
+	        if (!(array && array.length)) {
+	          return result;
+	        }
 
-	    return _pivot;
-	  }
+	        var index = -1,
+	            indexes = [],
+	            length = array.length;
+	        predicate = getIteratee(predicate, 3);
 
-	  function finish(d3_event) {
-	    d3_event.stopPropagation();
-	    context.replace(actionNoop(), annotation);
-	    context.enter(modeSelect(context, entityIDs));
-	  }
+	        while (++index < length) {
+	          var value = array[index];
 
-	  function cancel() {
-	    context.pop();
-	    context.enter(modeSelect(context, entityIDs));
-	  }
+	          if (predicate(value, index, array)) {
+	            result.push(value);
+	            indexes.push(index);
+	          }
+	        }
 
-	  function undone() {
-	    context.enter(modeBrowse(context));
-	  }
+	        basePullAt(array, indexes);
+	        return result;
+	      }
+	      /**
+	       * Reverses `array` so that the first element becomes the last, the second
+	       * element becomes the second to last, and so on.
+	       *
+	       * **Note:** This method mutates `array` and is based on
+	       * [`Array#reverse`](https://mdn.io/Array/reverse).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [1, 2, 3];
+	       *
+	       * _.reverse(array);
+	       * // => [3, 2, 1]
+	       *
+	       * console.log(array);
+	       * // => [3, 2, 1]
+	       */
 
-	  mode.enter = function () {
-	    context.features().forceVisible(entityIDs);
-	    behaviors.forEach(context.install);
-	    context.surface().on('mousemove.rotate', doRotate).on('click.rotate', finish);
-	    context.history().on('undone.rotate', undone);
-	    keybinding.on('⎋', cancel).on('↩', finish);
-	    select(document).call(keybinding);
-	  };
 
-	  mode.exit = function () {
-	    behaviors.forEach(context.uninstall);
-	    context.surface().on('mousemove.rotate', null).on('click.rotate', null);
-	    context.history().on('undone.rotate', null);
-	    select(document).call(keybinding.unbind);
-	    context.features().forceVisible([]);
-	  };
+	      function reverse(array) {
+	        return array == null ? array : nativeReverse.call(array);
+	      }
+	      /**
+	       * Creates a slice of `array` from `start` up to, but not including, `end`.
+	       *
+	       * **Note:** This method is used instead of
+	       * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
+	       * returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to slice.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns the slice of `array`.
+	       */
 
-	  mode.selectedIDs = function () {
-	    if (!arguments.length) return entityIDs; // no assign
 
-	    return mode;
-	  };
+	      function slice(array, start, end) {
+	        var length = array == null ? 0 : array.length;
 
-	  return mode;
-	}
+	        if (!length) {
+	          return [];
+	        }
 
-	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());
+	        if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
+	          start = 0;
+	          end = length;
+	        } else {
+	          start = start == null ? 0 : toInteger(start);
+	          end = end === undefined$1 ? length : toInteger(end);
+	        }
 
-	  var operation = function operation() {
-	    context.enter(modeRotate(context, selectedIDs));
-	  };
+	        return baseSlice(array, start, end);
+	      }
+	      /**
+	       * Uses a binary search to determine the lowest index at which `value`
+	       * should be inserted into `array` in order to maintain its sort order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * _.sortedIndex([30, 50], 40);
+	       * // => 1
+	       */
 
-	  operation.available = function () {
-	    return nodes.length >= 2;
-	  };
 
-	  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 sortedIndex(array, value) {
+	        return baseSortedIndex(array, value);
+	      }
+	      /**
+	       * This method is like `_.sortedIndex` except that it accepts `iteratee`
+	       * which is invoked for `value` and each element of `array` to compute their
+	       * sort ranking. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 4 }, { 'x': 5 }];
+	       *
+	       * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+	       * // => 0
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
+	       * // => 0
+	       */
 
-	    return false;
 
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
+	      function sortedIndexBy(array, value, iteratee) {
+	        return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
+	      }
+	      /**
+	       * This method is like `_.indexOf` except that it performs a binary
+	       * search on a sorted `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+	       * // => 1
+	       */
 
-	      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 sortedIndexOf(array, value) {
+	        var length = array == null ? 0 : array.length;
+
+	        if (length) {
+	          var index = baseSortedIndex(array, value);
+
+	          if (index < length && eq(array[index], value)) {
+	            return index;
+	          }
 	        }
-	      }
 
-	      return false;
-	    }
+	        return -1;
+	      }
+	      /**
+	       * This method is like `_.sortedIndex` except that it returns the highest
+	       * index at which `value` should be inserted into `array` in order to
+	       * maintain its sort order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+	       * // => 4
+	       */
 
-	    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);
-	  };
+	      function sortedLastIndex(array, value) {
+	        return baseSortedIndex(array, value, true);
+	      }
+	      /**
+	       * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
+	       * which is invoked for `value` and each element of `array` to compute their
+	       * sort ranking. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 4 }, { 'x': 5 }];
+	       *
+	       * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+	       * // => 1
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
+	       * // => 1
+	       */
 
-	  operation.annotation = function () {
-	    return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
-	      n: selectedIDs.length
-	    });
-	  };
 
-	  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 sortedLastIndexBy(array, value, iteratee) {
+	        return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
+	      }
+	      /**
+	       * This method is like `_.lastIndexOf` except that it performs a binary
+	       * search on a sorted `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
+	       * // => 3
+	       */
 
-	function modeMove(context, entityIDs, baseGraph) {
-	  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
-	  });
 
-	  var _prevGraph;
+	      function sortedLastIndexOf(array, value) {
+	        var length = array == null ? 0 : array.length;
 
-	  var _cache;
+	        if (length) {
+	          var index = baseSortedIndex(array, value, true) - 1;
 
-	  var _origin;
+	          if (eq(array[index], value)) {
+	            return index;
+	          }
+	        }
 
-	  var _nudgeInterval;
+	        return -1;
+	      }
+	      /**
+	       * This method is like `_.uniq` except that it's designed and optimized
+	       * for sorted arrays.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.sortedUniq([1, 1, 2]);
+	       * // => [1, 2]
+	       */
 
-	  function doMove(nudge) {
-	    nudge = nudge || [0, 0];
-	    var fn;
 
-	    if (_prevGraph !== context.graph()) {
-	      _cache = {};
-	      _origin = context.map().mouseCoordinates();
-	      fn = context.perform;
-	    } else {
-	      fn = context.overwrite;
-	    }
+	      function sortedUniq(array) {
+	        return array && array.length ? baseSortedUniq(array) : [];
+	      }
+	      /**
+	       * This method is like `_.uniqBy` except that it's designed and optimized
+	       * for sorted arrays.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
+	       * // => [1.1, 2.3]
+	       */
 
-	    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);
-	  }
+	      function sortedUniqBy(array, iteratee) {
+	        return array && array.length ? baseSortedUniq(array, getIteratee(iteratee, 2)) : [];
+	      }
+	      /**
+	       * Gets all but the first element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.tail([1, 2, 3]);
+	       * // => [2, 3]
+	       */
 
-	  function stopNudge() {
-	    if (_nudgeInterval) {
-	      window.clearInterval(_nudgeInterval);
-	      _nudgeInterval = null;
-	    }
-	  }
 
-	  function move() {
-	    doMove();
-	    var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
+	      function tail(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseSlice(array, 1, length) : [];
+	      }
+	      /**
+	       * Creates a slice of `array` with `n` elements taken from the beginning.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to take.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.take([1, 2, 3]);
+	       * // => [1]
+	       *
+	       * _.take([1, 2, 3], 2);
+	       * // => [1, 2]
+	       *
+	       * _.take([1, 2, 3], 5);
+	       * // => [1, 2, 3]
+	       *
+	       * _.take([1, 2, 3], 0);
+	       * // => []
+	       */
 
-	    if (nudge) {
-	      startNudge(nudge);
-	    } else {
-	      stopNudge();
-	    }
-	  }
 
-	  function finish(d3_event) {
-	    d3_event.stopPropagation();
-	    context.replace(actionNoop(), annotation);
-	    context.enter(modeSelect(context, entityIDs));
-	    stopNudge();
-	  }
+	      function take(array, n, guard) {
+	        if (!(array && array.length)) {
+	          return [];
+	        }
 
-	  function cancel() {
-	    if (baseGraph) {
-	      while (context.graph() !== baseGraph) {
-	        context.pop();
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        return baseSlice(array, 0, n < 0 ? 0 : n);
 	      }
+	      /**
+	       * Creates a slice of `array` with `n` elements taken from the end.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to take.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.takeRight([1, 2, 3]);
+	       * // => [3]
+	       *
+	       * _.takeRight([1, 2, 3], 2);
+	       * // => [2, 3]
+	       *
+	       * _.takeRight([1, 2, 3], 5);
+	       * // => [1, 2, 3]
+	       *
+	       * _.takeRight([1, 2, 3], 0);
+	       * // => []
+	       */
 
-	      context.enter(modeBrowse(context));
-	    } else {
-	      context.pop();
-	      context.enter(modeSelect(context, entityIDs));
-	    }
 
-	    stopNudge();
-	  }
+	      function takeRight(array, n, guard) {
+	        var length = array == null ? 0 : array.length;
 
-	  function undone() {
-	    context.enter(modeBrowse(context));
-	  }
+	        if (!length) {
+	          return [];
+	        }
 
-	  mode.enter = function () {
-	    _origin = context.map().mouseCoordinates();
-	    _prevGraph = null;
-	    _cache = {};
-	    context.features().forceVisible(entityIDs);
-	    behaviors.forEach(context.install);
-	    context.surface().on('mousemove.move', move).on('click.move', finish);
-	    context.history().on('undone.move', undone);
-	    keybinding.on('⎋', cancel).on('↩', finish);
-	    select(document).call(keybinding);
-	  };
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        n = length - n;
+	        return baseSlice(array, n < 0 ? 0 : n, length);
+	      }
+	      /**
+	       * Creates a slice of `array` with elements taken from the end. Elements are
+	       * taken until `predicate` returns falsey. The predicate is invoked with
+	       * three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': true },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': false }
+	       * ];
+	       *
+	       * _.takeRightWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['fred', 'pebbles']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
+	       * // => objects for ['pebbles']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.takeRightWhile(users, ['active', false]);
+	       * // => objects for ['fred', 'pebbles']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.takeRightWhile(users, 'active');
+	       * // => []
+	       */
 
-	  mode.exit = function () {
-	    stopNudge();
-	    behaviors.forEach(function (behavior) {
-	      context.uninstall(behavior);
-	    });
-	    context.surface().on('mousemove.move', null).on('click.move', null);
-	    context.history().on('undone.move', null);
-	    select(document).call(keybinding.unbind);
-	    context.features().forceVisible([]);
-	  };
 
-	  mode.selectedIDs = function () {
-	    if (!arguments.length) return entityIDs; // no assign
+	      function takeRightWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3), false, true) : [];
+	      }
+	      /**
+	       * Creates a slice of `array` with elements taken from the beginning. Elements
+	       * are taken until `predicate` returns falsey. The predicate is invoked with
+	       * three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': false },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': true }
+	       * ];
+	       *
+	       * _.takeWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['barney', 'fred']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.takeWhile(users, { 'user': 'barney', 'active': false });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.takeWhile(users, ['active', false]);
+	       * // => objects for ['barney', 'fred']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.takeWhile(users, 'active');
+	       * // => []
+	       */
 
-	    return mode;
-	  };
 
-	  return mode;
-	}
+	      function takeWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3)) : [];
+	      }
+	      /**
+	       * Creates an array of unique values, in order, from all given arrays using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @returns {Array} Returns the new array of combined values.
+	       * @example
+	       *
+	       * _.union([2], [1, 2]);
+	       * // => [2, 1]
+	       */
 
-	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];
+	      var union = baseRest(function (arrays) {
+	        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
+	      });
+	      /**
+	       * This method is like `_.union` except that it accepts `iteratee` which is
+	       * invoked for each element of each `arrays` to generate the criterion by
+	       * which uniqueness is computed. Result values are chosen from the first
+	       * array in which the value occurs. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of combined values.
+	       * @example
+	       *
+	       * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+	       * // => [2.1, 1.2]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 1 }, { 'x': 2 }]
+	       */
 
-	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
+	      var unionBy = baseRest(function (arrays) {
+	        var iteratee = last(arrays);
 
+	        if (isArrayLikeObject(iteratee)) {
+	          iteratee = undefined$1;
+	        }
 
-	      var parents = context.graph().parentWays(newEntity);
-	      var parentCopied = parents.some(function (parent) {
-	        return originals.has(parent.id);
+	        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
+	      });
+	      /**
+	       * This method is like `_.union` except that it accepts `comparator` which
+	       * is invoked to compare elements of `arrays`. Result values are chosen from
+	       * the first array in which the value occurs. The comparator is invoked
+	       * with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of combined values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.unionWith(objects, others, _.isEqual);
+	       * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+	       */
+
+	      var unionWith = baseRest(function (arrays) {
+	        var comparator = last(arrays);
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
+	        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined$1, comparator);
 	      });
+	      /**
+	       * Creates a duplicate-free version of an array, using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons, in which only the first occurrence of each element
+	       * is kept. The order of result values is determined by the order they occur
+	       * in the array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.uniq([2, 1, 2]);
+	       * // => [2, 1]
+	       */
 
-	      if (!parentCopied) {
-	        newIDs.push(newEntity.id);
+	      function uniq(array) {
+	        return array && array.length ? baseUniq(array) : [];
 	      }
-	    } // Put pasted objects where mouse pointer is..
+	      /**
+	       * This method is like `_.uniq` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the criterion by which
+	       * uniqueness is computed. The order of result values is determined by the
+	       * order they occur in the array. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
+	       * // => [2.1, 1.2]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 1 }, { 'x': 2 }]
+	       */
 
 
-	    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));
-	  }
+	      function uniqBy(array, iteratee) {
+	        return array && array.length ? baseUniq(array, getIteratee(iteratee, 2)) : [];
+	      }
+	      /**
+	       * This method is like `_.uniq` except that it accepts `comparator` which
+	       * is invoked to compare elements of `array`. The order of result values is
+	       * determined by the order they occur in the array.The comparator is invoked
+	       * with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.uniqWith(objects, _.isEqual);
+	       * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
+	       */
 
-	  function behavior() {
-	    context.keybinding().on(uiCmd('⌘V'), doPaste);
-	    return behavior;
-	  }
 
-	  behavior.off = function () {
-	    context.keybinding().off(uiCmd('⌘V'));
-	  };
+	      function uniqWith(array, comparator) {
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
+	        return array && array.length ? baseUniq(array, undefined$1, comparator) : [];
+	      }
+	      /**
+	       * This method is like `_.zip` except that it accepts an array of grouped
+	       * elements and creates an array regrouping the elements to their pre-zip
+	       * configuration.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.2.0
+	       * @category Array
+	       * @param {Array} array The array of grouped elements to process.
+	       * @returns {Array} Returns the new array of regrouped elements.
+	       * @example
+	       *
+	       * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
+	       * // => [['a', 1, true], ['b', 2, false]]
+	       *
+	       * _.unzip(zipped);
+	       * // => [['a', 'b'], [1, 2], [true, false]]
+	       */
 
-	  return behavior;
-	}
 
-	// `String.prototype.repeat` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype.repeat
-	_export({ target: 'String', proto: true }, {
-	  repeat: stringRepeat
-	});
+	      function unzip(array) {
+	        if (!(array && array.length)) {
+	          return [];
+	        }
 
-	/*
-	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
+	        var length = 0;
+	        array = arrayFilter(array, function (group) {
+	          if (isArrayLikeObject(group)) {
+	            length = nativeMax(group.length, length);
+	            return true;
+	          }
+	        });
+	        return baseTimes(length, function (index) {
+	          return arrayMap(array, baseProperty(index));
+	        });
+	      }
+	      /**
+	       * This method is like `_.unzip` except that it accepts `iteratee` to specify
+	       * how regrouped values should be combined. The iteratee is invoked with the
+	       * elements of each group: (...group).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.8.0
+	       * @category Array
+	       * @param {Array} array The array of grouped elements to process.
+	       * @param {Function} [iteratee=_.identity] The function to combine
+	       *  regrouped values.
+	       * @returns {Array} Returns the new array of regrouped elements.
+	       * @example
+	       *
+	       * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
+	       * // => [[1, 10, 100], [2, 20, 200]]
+	       *
+	       * _.unzipWith(zipped, _.add);
+	       * // => [3, 30, 300]
+	       */
 
-	    * 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.
-	 */
 
-	function behaviorDrag() {
-	  var dispatch$1 = dispatch('start', 'move', 'end'); // see also behaviorSelect
+	      function unzipWith(array, iteratee) {
+	        if (!(array && array.length)) {
+	          return [];
+	        }
 
-	  var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
+	        var result = unzip(array);
 
-	  var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
+	        if (iteratee == null) {
+	          return result;
+	        }
 
-	  var _origin = null;
-	  var _selector = '';
+	        return arrayMap(result, function (group) {
+	          return apply(iteratee, undefined$1, group);
+	        });
+	      }
+	      /**
+	       * Creates an array excluding all given values using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * **Note:** Unlike `_.pull`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...*} [values] The values to exclude.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @see _.difference, _.xor
+	       * @example
+	       *
+	       * _.without([2, 1, 2, 3], 1, 2);
+	       * // => [3]
+	       */
 
-	  var _targetNode;
 
-	  var _targetEntity;
+	      var without = baseRest(function (array, values) {
+	        return isArrayLikeObject(array) ? baseDifference(array, values) : [];
+	      });
+	      /**
+	       * Creates an array of unique values that is the
+	       * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
+	       * of the given arrays. The order of result values is determined by the order
+	       * they occur in the arrays.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @see _.difference, _.without
+	       * @example
+	       *
+	       * _.xor([2, 1], [2, 3]);
+	       * // => [1, 3]
+	       */
 
-	  var _surface;
+	      var xor = baseRest(function (arrays) {
+	        return baseXor(arrayFilter(arrays, isArrayLikeObject));
+	      });
+	      /**
+	       * This method is like `_.xor` except that it accepts `iteratee` which is
+	       * invoked for each element of each `arrays` to generate the criterion by
+	       * which by which they're compared. The order of result values is determined
+	       * by the order they occur in the arrays. The iteratee is invoked with one
+	       * argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+	       * // => [1.2, 3.4]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 2 }]
+	       */
 
-	  var _pointerId; // use pointer events on supported platforms; fallback to mouse events
+	      var xorBy = baseRest(function (arrays) {
+	        var iteratee = last(arrays);
 
+	        if (isArrayLikeObject(iteratee)) {
+	          iteratee = undefined$1;
+	        }
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	        return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
+	      });
+	      /**
+	       * This method is like `_.xor` except that it accepts `comparator` which is
+	       * invoked to compare elements of `arrays`. The order of result values is
+	       * determined by the order they occur in the arrays. The comparator is invoked
+	       * with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.xorWith(objects, others, _.isEqual);
+	       * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+	       */
 
-	  var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
+	      var xorWith = baseRest(function (arrays) {
+	        var comparator = last(arrays);
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
+	        return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined$1, comparator);
+	      });
+	      /**
+	       * Creates an array of grouped elements, the first of which contains the
+	       * first elements of the given arrays, the second of which contains the
+	       * second elements of the given arrays, and so on.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to process.
+	       * @returns {Array} Returns the new array of grouped elements.
+	       * @example
+	       *
+	       * _.zip(['a', 'b'], [1, 2], [true, false]);
+	       * // => [['a', 1, true], ['b', 2, false]]
+	       */
 
-	  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);
-	    };
-	  };
+	      var zip = baseRest(unzip);
+	      /**
+	       * This method is like `_.fromPairs` except that it accepts two arrays,
+	       * one of property identifiers and one of corresponding values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.4.0
+	       * @category Array
+	       * @param {Array} [props=[]] The property identifiers.
+	       * @param {Array} [values=[]] The property values.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * _.zipObject(['a', 'b'], [1, 2]);
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	  function pointerdown(d3_event) {
-	    if (_pointerId) return;
-	    _pointerId = d3_event.pointerId || 'mouse';
-	    _targetNode = this; // only force reflow once per drag
+	      function zipObject(props, values) {
+	        return baseZipObject(props || [], values || [], assignValue);
+	      }
+	      /**
+	       * This method is like `_.zipObject` except that it supports property paths.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.1.0
+	       * @category Array
+	       * @param {Array} [props=[]] The property identifiers.
+	       * @param {Array} [values=[]] The property values.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
+	       * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
+	       */
 
-	    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 (_origin) {
-	      offset = _origin.call(_targetNode, _targetEntity);
-	      offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-	    } else {
-	      offset = [0, 0];
-	    }
+	      function zipObjectDeep(props, values) {
+	        return baseZipObject(props || [], values || [], baseSet);
+	      }
+	      /**
+	       * This method is like `_.zip` except that it accepts `iteratee` to specify
+	       * how grouped values should be combined. The iteratee is invoked with the
+	       * elements of each group: (...group).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.8.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to process.
+	       * @param {Function} [iteratee=_.identity] The function to combine
+	       *  grouped values.
+	       * @returns {Array} Returns the new array of grouped elements.
+	       * @example
+	       *
+	       * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
+	       *   return a + b + c;
+	       * });
+	       * // => [111, 222]
+	       */
 
-	    d3_event.stopPropagation();
 
-	    function pointermove(d3_event) {
-	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-	      var p = pointerLocGetter(d3_event);
+	      var zipWith = baseRest(function (arrays) {
+	        var length = arrays.length,
+	            iteratee = length > 1 ? arrays[length - 1] : undefined$1;
+	        iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined$1;
+	        return unzipWith(arrays, iteratee);
+	      });
+	      /*------------------------------------------------------------------------*/
 
-	      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
+	      /**
+	       * Creates a `lodash` wrapper instance that wraps `value` with explicit method
+	       * chain sequences enabled. The result of such sequences must be unwrapped
+	       * with `_#value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.3.0
+	       * @category Seq
+	       * @param {*} value The value to wrap.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'age': 36 },
+	       *   { 'user': 'fred',    'age': 40 },
+	       *   { 'user': 'pebbles', 'age': 1 }
+	       * ];
+	       *
+	       * var youngest = _
+	       *   .chain(users)
+	       *   .sortBy('age')
+	       *   .map(function(o) {
+	       *     return o.user + ' is ' + o.age;
+	       *   })
+	       *   .head()
+	       *   .value();
+	       * // => 'pebbles is 1'
+	       */
 
-	        if (dist < tolerance) return;
-	        started = true;
-	        dispatch$1.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$1.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+	      function chain(value) {
+	        var result = lodash(value);
+	        result.__chain__ = true;
+	        return result;
 	      }
-	    }
+	      /**
+	       * This method invokes `interceptor` and returns `value`. The interceptor
+	       * is invoked with one argument; (value). The purpose of this method is to
+	       * "tap into" a method chain sequence in order to modify intermediate results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Seq
+	       * @param {*} value The value to provide to `interceptor`.
+	       * @param {Function} interceptor The function to invoke.
+	       * @returns {*} Returns `value`.
+	       * @example
+	       *
+	       * _([1, 2, 3])
+	       *  .tap(function(array) {
+	       *    // Mutate input array.
+	       *    array.pop();
+	       *  })
+	       *  .reverse()
+	       *  .value();
+	       * // => [2, 1]
+	       */
 
-	    function pointerup(d3_event) {
-	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-	      _pointerId = null;
 
-	      if (started) {
-	        dispatch$1.call('end', this, d3_event, _targetEntity);
-	        d3_event.preventDefault();
+	      function tap(value, interceptor) {
+	        interceptor(value);
+	        return value;
 	      }
+	      /**
+	       * This method is like `_.tap` except that it returns the result of `interceptor`.
+	       * The purpose of this method is to "pass thru" values replacing intermediate
+	       * results in a method chain sequence.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Seq
+	       * @param {*} value The value to provide to `interceptor`.
+	       * @param {Function} interceptor The function to invoke.
+	       * @returns {*} Returns the result of `interceptor`.
+	       * @example
+	       *
+	       * _('  abc  ')
+	       *  .chain()
+	       *  .trim()
+	       *  .thru(function(value) {
+	       *    return [value];
+	       *  })
+	       *  .value();
+	       * // => ['abc']
+	       */
 
-	      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 thru(value, interceptor) {
+	        return interceptor(value);
+	      }
+	      /**
+	       * This method is the wrapper version of `_.at`.
+	       *
+	       * @name at
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Seq
+	       * @param {...(string|string[])} [paths] The property paths to pick.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+	       *
+	       * _(object).at(['a[0].b.c', 'a[1]']).value();
+	       * // => [3, 4]
+	       */
+
+
+	      var wrapperAt = flatRest(function (paths) {
+	        var length = paths.length,
+	            start = length ? paths[0] : 0,
+	            value = this.__wrapped__,
+	            interceptor = function interceptor(object) {
+	          return baseAt(object, paths);
+	        };
+
+	        if (length > 1 || this.__actions__.length || !(value instanceof LazyWrapper) || !isIndex(start)) {
+	          return this.thru(interceptor);
+	        }
+
+	        value = value.slice(start, +start + (length ? 1 : 0));
+
+	        value.__actions__.push({
+	          'func': thru,
+	          'args': [interceptor],
+	          'thisArg': undefined$1
+	        });
+
+	        return new LodashWrapper(value, this.__chain__).thru(function (array) {
+	          if (length && !array.length) {
+	            array.push(undefined$1);
+	          }
+
+	          return array;
+	        });
+	      });
+	      /**
+	       * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
+	       *
+	       * @name chain
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Seq
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36 },
+	       *   { 'user': 'fred',   'age': 40 }
+	       * ];
+	       *
+	       * // A sequence without explicit chaining.
+	       * _(users).head();
+	       * // => { 'user': 'barney', 'age': 36 }
+	       *
+	       * // A sequence with explicit chaining.
+	       * _(users)
+	       *   .chain()
+	       *   .head()
+	       *   .pick('user')
+	       *   .value();
+	       * // => { 'user': 'barney' }
+	       */
+
+	      function wrapperChain() {
+	        return chain(this);
+	      }
+	      /**
+	       * Executes the chain sequence and returns the wrapped result.
+	       *
+	       * @name commit
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Seq
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var array = [1, 2];
+	       * var wrapped = _(array).push(3);
+	       *
+	       * console.log(array);
+	       * // => [1, 2]
+	       *
+	       * wrapped = wrapped.commit();
+	       * console.log(array);
+	       * // => [1, 2, 3]
+	       *
+	       * wrapped.last();
+	       * // => 3
+	       *
+	       * console.log(array);
+	       * // => [1, 2, 3]
+	       */
+
 
-	    if (_selector) {
-	      delegate = function delegate(d3_event) {
-	        var root = this;
-	        var target = d3_event.target;
+	      function wrapperCommit() {
+	        return new LodashWrapper(this.value(), this.__chain__);
+	      }
+	      /**
+	       * Gets the next value on a wrapped object following the
+	       * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
+	       *
+	       * @name next
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Seq
+	       * @returns {Object} Returns the next iterator value.
+	       * @example
+	       *
+	       * var wrapped = _([1, 2]);
+	       *
+	       * wrapped.next();
+	       * // => { 'done': false, 'value': 1 }
+	       *
+	       * wrapped.next();
+	       * // => { 'done': false, 'value': 2 }
+	       *
+	       * wrapped.next();
+	       * // => { 'done': true, 'value': undefined }
+	       */
 
-	        for (; target && target !== root; target = target.parentNode) {
-	          var datum = target.__data__;
-	          _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-	          if (_targetEntity && target[matchesSelector](_selector)) {
-	            return pointerdown.call(target, d3_event);
-	          }
+	      function wrapperNext() {
+	        if (this.__values__ === undefined$1) {
+	          this.__values__ = toArray(this.value());
 	        }
-	      };
-	    }
-
-	    selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
-	  }
 
-	  behavior.off = function (selection) {
-	    selection.on(_pointerPrefix + 'down.drag' + _selector, null);
-	  };
+	        var done = this.__index__ >= this.__values__.length,
+	            value = done ? undefined$1 : this.__values__[this.__index__++];
+	        return {
+	          'done': done,
+	          'value': value
+	        };
+	      }
+	      /**
+	       * Enables the wrapper to be iterable.
+	       *
+	       * @name Symbol.iterator
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Seq
+	       * @returns {Object} Returns the wrapper object.
+	       * @example
+	       *
+	       * var wrapped = _([1, 2]);
+	       *
+	       * wrapped[Symbol.iterator]() === wrapped;
+	       * // => true
+	       *
+	       * Array.from(wrapped);
+	       * // => [1, 2]
+	       */
 
-	  behavior.selector = function (_) {
-	    if (!arguments.length) return _selector;
-	    _selector = _;
-	    return behavior;
-	  };
 
-	  behavior.origin = function (_) {
-	    if (!arguments.length) return _origin;
-	    _origin = _;
-	    return behavior;
-	  };
+	      function wrapperToIterator() {
+	        return this;
+	      }
+	      /**
+	       * Creates a clone of the chain sequence planting `value` as the wrapped value.
+	       *
+	       * @name plant
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Seq
+	       * @param {*} value The value to plant.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var wrapped = _([1, 2]).map(square);
+	       * var other = wrapped.plant([3, 4]);
+	       *
+	       * other.value();
+	       * // => [9, 16]
+	       *
+	       * wrapped.value();
+	       * // => [1, 4]
+	       */
 
-	  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 wrapperPlant(value) {
+	        var result,
+	            parent = this;
 
-	  behavior.targetEntity = function (_) {
-	    if (!arguments.length) return _targetEntity;
-	    _targetEntity = _;
-	    return behavior;
-	  };
+	        while (parent instanceof baseLodash) {
+	          var clone = wrapperClone(parent);
+	          clone.__index__ = 0;
+	          clone.__values__ = undefined$1;
 
-	  behavior.surface = function (_) {
-	    if (!arguments.length) return _surface;
-	    _surface = _;
-	    return behavior;
-	  };
+	          if (result) {
+	            previous.__wrapped__ = clone;
+	          } else {
+	            result = clone;
+	          }
 
-	  return utilRebind(behavior, dispatch$1, 'on');
-	}
+	          var previous = clone;
+	          parent = parent.__wrapped__;
+	        }
 
-	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);
+	        previous.__wrapped__ = value;
+	        return result;
+	      }
+	      /**
+	       * This method is the wrapper version of `_.reverse`.
+	       *
+	       * **Note:** This method mutates the wrapped array.
+	       *
+	       * @name reverse
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Seq
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var array = [1, 2, 3];
+	       *
+	       * _(array).reverse().value()
+	       * // => [3, 2, 1]
+	       *
+	       * console.log(array);
+	       * // => [3, 2, 1]
+	       */
 
-	  var _nudgeInterval;
 
-	  var _restoreSelectedIDs = [];
-	  var _wasMidpoint = false;
-	  var _isCancelled = false;
+	      function wrapperReverse() {
+	        var value = this.__wrapped__;
 
-	  var _activeEntity;
+	        if (value instanceof LazyWrapper) {
+	          var wrapped = value;
 
-	  var _startLoc;
+	          if (this.__actions__.length) {
+	            wrapped = new LazyWrapper(this);
+	          }
 
-	  var _lastLoc;
+	          wrapped = wrapped.reverse();
 
-	  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);
-	  }
+	          wrapped.__actions__.push({
+	            'func': thru,
+	            'args': [reverse],
+	            'thisArg': undefined$1
+	          });
 
-	  function stopNudge() {
-	    if (_nudgeInterval) {
-	      window.clearInterval(_nudgeInterval);
-	      _nudgeInterval = null;
-	    }
-	  }
+	          return new LodashWrapper(wrapped, this.__chain__);
+	        }
 
-	  function moveAnnotation(entity) {
-	    return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-	  }
+	        return this.thru(reverse);
+	      }
+	      /**
+	       * Executes the chain sequence to resolve the unwrapped value.
+	       *
+	       * @name value
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @alias toJSON, valueOf
+	       * @category Seq
+	       * @returns {*} Returns the resolved unwrapped value.
+	       * @example
+	       *
+	       * _([1, 2, 3]).value();
+	       * // => [1, 2, 3]
+	       */
 
-	  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
+	      function wrapperValue() {
+	        return baseWrapperValue(this.__wrapped__, this.__actions__);
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	      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');
-	        }
+	      /**
+	       * Creates an object composed of keys generated from the results of running
+	       * each element of `collection` thru `iteratee`. The corresponding value of
+	       * each key is the number of times the key was returned by `iteratee`. The
+	       * iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.5.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+	       * @returns {Object} Returns the composed aggregate object.
+	       * @example
+	       *
+	       * _.countBy([6.1, 4.2, 6.3], Math.floor);
+	       * // => { '4': 1, '6': 2 }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.countBy(['one', 'two', 'three'], 'length');
+	       * // => { '3': 2, '5': 1 }
+	       */
 
-	        return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
-	      }
-	    }
 
-	    return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-	  }
+	      var countBy = createAggregator(function (result, value, key) {
+	        if (hasOwnProperty.call(result, key)) {
+	          ++result[key];
+	        } else {
+	          baseAssignValue(result, key, 1);
+	        }
+	      });
+	      /**
+	       * Checks if `predicate` returns truthy for **all** elements of `collection`.
+	       * Iteration is stopped once `predicate` returns falsey. The predicate is
+	       * invoked with three arguments: (value, index|key, collection).
+	       *
+	       * **Note:** This method returns `true` for
+	       * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+	       * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+	       * elements of empty collections.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {boolean} Returns `true` if all elements pass the predicate check,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.every([true, 1, null, 'yes'], Boolean);
+	       * // => false
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': false },
+	       *   { 'user': 'fred',   'age': 40, 'active': false }
+	       * ];
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.every(users, { 'user': 'barney', 'active': false });
+	       * // => false
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.every(users, ['active', false]);
+	       * // => true
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.every(users, 'active');
+	       * // => false
+	       */
 
-	  function shouldSnapToNode(target) {
-	    if (!_activeEntity) return false;
-	    return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
-	  }
+	      function every(collection, predicate, guard) {
+	        var func = isArray(collection) ? arrayEvery : baseEvery;
 
-	  function origin(entity) {
-	    return context.projection(entity.loc);
-	  }
+	        if (guard && isIterateeCall(collection, predicate, guard)) {
+	          predicate = undefined$1;
+	        }
 
-	  function keydown(d3_event) {
-	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-	      if (context.surface().classed('nope')) {
-	        context.surface().classed('nope-suppressed', true);
+	        return func(collection, getIteratee(predicate, 3));
 	      }
+	      /**
+	       * Iterates over elements of `collection`, returning an array of all elements
+	       * `predicate` returns truthy for. The predicate is invoked with three
+	       * arguments: (value, index|key, collection).
+	       *
+	       * **Note:** Unlike `_.remove`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new filtered array.
+	       * @see _.reject
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': true },
+	       *   { 'user': 'fred',   'age': 40, 'active': false }
+	       * ];
+	       *
+	       * _.filter(users, function(o) { return !o.active; });
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.filter(users, { 'age': 36, 'active': true });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.filter(users, ['active', false]);
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.filter(users, 'active');
+	       * // => objects for ['barney']
+	       *
+	       * // Combining several predicates using `_.overEvery` or `_.overSome`.
+	       * _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
+	       * // => objects for ['fred', 'barney']
+	       */
 
-	      context.surface().classed('nope', false).classed('nope-disabled', true);
-	    }
-	  }
 
-	  function keyup(d3_event) {
-	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-	      if (context.surface().classed('nope-suppressed')) {
-	        context.surface().classed('nope', true);
+	      function filter(collection, predicate) {
+	        var func = isArray(collection) ? arrayFilter : baseFilter;
+	        return func(collection, getIteratee(predicate, 3));
 	      }
+	      /**
+	       * Iterates over elements of `collection`, returning the first element
+	       * `predicate` returns truthy for. The predicate is invoked with three
+	       * arguments: (value, index|key, collection).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @returns {*} Returns the matched element, else `undefined`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'age': 36, 'active': true },
+	       *   { 'user': 'fred',    'age': 40, 'active': false },
+	       *   { 'user': 'pebbles', 'age': 1,  'active': true }
+	       * ];
+	       *
+	       * _.find(users, function(o) { return o.age < 40; });
+	       * // => object for 'barney'
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.find(users, { 'age': 1, 'active': true });
+	       * // => object for 'pebbles'
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.find(users, ['active', false]);
+	       * // => object for 'fred'
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.find(users, 'active');
+	       * // => object for 'barney'
+	       */
 
-	      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;
+	      var find = createFind(findIndex);
+	      /**
+	       * This method is like `_.find` except that it iterates over elements of
+	       * `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=collection.length-1] The index to search from.
+	       * @returns {*} Returns the matched element, else `undefined`.
+	       * @example
+	       *
+	       * _.findLast([1, 2, 3, 4], function(n) {
+	       *   return n % 2 == 1;
+	       * });
+	       * // => 3
+	       */
 
-	    if (_isCancelled) {
-	      if (hasHidden) {
-	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+	      var findLast = createFind(findLastIndex);
+	      /**
+	       * Creates a flattened array of values by running each element in `collection`
+	       * thru `iteratee` and flattening the mapped results. The iteratee is invoked
+	       * with three arguments: (value, index|key, collection).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * function duplicate(n) {
+	       *   return [n, n];
+	       * }
+	       *
+	       * _.flatMap([1, 2], duplicate);
+	       * // => [1, 1, 2, 2]
+	       */
+
+	      function flatMap(collection, iteratee) {
+	        return baseFlatten(map(collection, iteratee), 1);
 	      }
+	      /**
+	       * This method is like `_.flatMap` except that it recursively flattens the
+	       * mapped results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * function duplicate(n) {
+	       *   return [[[n, n]]];
+	       * }
+	       *
+	       * _.flatMapDeep([1, 2], duplicate);
+	       * // => [1, 1, 2, 2]
+	       */
 
-	      return drag.cancel();
-	    }
 
-	    if (_wasMidpoint) {
-	      var midpoint = entity;
-	      entity = osmNode();
-	      context.perform(actionAddMidpoint(midpoint, entity));
-	      entity = context.entity(entity.id); // get post-action entity
+	      function flatMapDeep(collection, iteratee) {
+	        return baseFlatten(map(collection, iteratee), INFINITY);
+	      }
+	      /**
+	       * This method is like `_.flatMap` except that it recursively flattens the
+	       * mapped results up to `depth` times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {number} [depth=1] The maximum recursion depth.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * function duplicate(n) {
+	       *   return [[[n, n]]];
+	       * }
+	       *
+	       * _.flatMapDepth([1, 2], duplicate, 2);
+	       * // => [[1, 1], [2, 2]]
+	       */
 
-	      var vertex = context.surface().selectAll('.' + entity.id);
-	      drag.targetNode(vertex.node()).targetEntity(entity);
-	    } else {
-	      context.perform(actionNoop());
-	    }
 
-	    _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()`
+	      function flatMapDepth(collection, iteratee, depth) {
+	        depth = depth === undefined$1 ? 1 : toInteger(depth);
+	        return baseFlatten(map(collection, iteratee), depth);
+	      }
+	      /**
+	       * Iterates over elements of `collection` and invokes `iteratee` for each element.
+	       * The iteratee is invoked with three arguments: (value, index|key, collection).
+	       * Iteratee functions may exit iteration early by explicitly returning `false`.
+	       *
+	       * **Note:** As with other "Collections" methods, objects with a "length"
+	       * property are iterated like arrays. To avoid this behavior use `_.forIn`
+	       * or `_.forOwn` for object iteration.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @alias each
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       * @see _.forEachRight
+	       * @example
+	       *
+	       * _.forEach([1, 2], function(value) {
+	       *   console.log(value);
+	       * });
+	       * // => Logs `1` then `2`.
+	       *
+	       * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+	       */
 
 
-	  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 forEach(collection, iteratee) {
+	        var func = isArray(collection) ? arrayEach : baseEach;
+	        return func(collection, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * This method is like `_.forEach` except that it iterates over elements of
+	       * `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @alias eachRight
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       * @see _.forEach
+	       * @example
+	       *
+	       * _.forEachRight([1, 2], function(value) {
+	       *   console.log(value);
+	       * });
+	       * // => Logs `2` then `1`.
+	       */
 
-	  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;
+	      function forEachRight(collection, iteratee) {
+	        var func = isArray(collection) ? arrayEachRight : baseEachRight;
+	        return func(collection, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * Creates an object composed of keys generated from the results of running
+	       * each element of `collection` thru `iteratee`. The order of grouped values
+	       * is determined by the order they occur in `collection`. The corresponding
+	       * value of each key is an array of elements responsible for generating the
+	       * key. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+	       * @returns {Object} Returns the composed aggregate object.
+	       * @example
+	       *
+	       * _.groupBy([6.1, 4.2, 6.3], Math.floor);
+	       * // => { '4': [4.2], '6': [6.1, 6.3] }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.groupBy(['one', 'two', 'three'], 'length');
+	       * // => { '3': ['one', 'two'], '5': ['three'] }
+	       */
 
-	      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);
 
-	        if (edge) {
-	          loc = edge.loc;
+	      var groupBy = createAggregator(function (result, value, key) {
+	        if (hasOwnProperty.call(result, key)) {
+	          result[key].push(value);
+	        } else {
+	          baseAssignValue(result, key, [value]);
 	        }
-	      }
-	    }
+	      });
+	      /**
+	       * Checks if `value` is in `collection`. If `collection` is a string, it's
+	       * checked for a substring of `value`, otherwise
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * is used for equality comparisons. If `fromIndex` is negative, it's used as
+	       * the offset from the end of `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object|string} collection The collection to inspect.
+	       * @param {*} value The value to search for.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+	       * @returns {boolean} Returns `true` if `value` is found, else `false`.
+	       * @example
+	       *
+	       * _.includes([1, 2, 3], 1);
+	       * // => true
+	       *
+	       * _.includes([1, 2, 3], 1, 2);
+	       * // => false
+	       *
+	       * _.includes({ 'a': 1, 'b': 2 }, 1);
+	       * // => true
+	       *
+	       * _.includes('abcd', 'bc');
+	       * // => true
+	       */
 
-	    context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
+	      function includes(collection, value, fromIndex, guard) {
+	        collection = isArrayLike(collection) ? collection : values(collection);
+	        fromIndex = fromIndex && !guard ? toInteger(fromIndex) : 0;
+	        var length = collection.length;
 
-	    var isInvalid = false; // Check if this connection to `target` could cause relations to break..
+	        if (fromIndex < 0) {
+	          fromIndex = nativeMax(length + fromIndex, 0);
+	        }
 
-	    if (target) {
-	      isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-	    } // Check if this drag causes the geometry to break..
+	        return isString(collection) ? fromIndex <= length && collection.indexOf(value, fromIndex) > -1 : !!length && baseIndexOf(collection, value, fromIndex) > -1;
+	      }
+	      /**
+	       * Invokes the method at `path` of each element in `collection`, returning
+	       * an array of the results of each invoked method. Any additional arguments
+	       * are provided to each invoked method. If `path` is a function, it's invoked
+	       * for, and `this` bound to, each element in `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Array|Function|string} path The path of the method to invoke or
+	       *  the function invoked per iteration.
+	       * @param {...*} [args] The arguments to invoke each method with.
+	       * @returns {Array} Returns the array of results.
+	       * @example
+	       *
+	       * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
+	       * // => [[1, 5, 7], [1, 2, 3]]
+	       *
+	       * _.invokeMap([123, 456], String.prototype.split, '');
+	       * // => [['1', '2', '3'], ['4', '5', '6']]
+	       */
 
 
-	    if (!isInvalid) {
-	      isInvalid = hasInvalidGeometry(entity, context.graph());
-	    }
+	      var invokeMap = baseRest(function (collection, path, args) {
+	        var index = -1,
+	            isFunc = typeof path == 'function',
+	            result = isArrayLike(collection) ? Array(collection.length) : [];
+	        baseEach(collection, function (value) {
+	          result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
+	        });
+	        return result;
+	      });
+	      /**
+	       * Creates an object composed of keys generated from the results of running
+	       * each element of `collection` thru `iteratee`. The corresponding value of
+	       * each key is the last element responsible for generating the key. The
+	       * iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+	       * @returns {Object} Returns the composed aggregate object.
+	       * @example
+	       *
+	       * var array = [
+	       *   { 'dir': 'left', 'code': 97 },
+	       *   { 'dir': 'right', 'code': 100 }
+	       * ];
+	       *
+	       * _.keyBy(array, function(o) {
+	       *   return String.fromCharCode(o.code);
+	       * });
+	       * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+	       *
+	       * _.keyBy(array, 'dir');
+	       * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
+	       */
 
-	    var nope = context.surface().classed('nope');
+	      var keyBy = createAggregator(function (result, value, key) {
+	        baseAssignValue(result, key, value);
+	      });
+	      /**
+	       * Creates an array of values by running each element in `collection` thru
+	       * `iteratee`. The iteratee is invoked with three arguments:
+	       * (value, index|key, collection).
+	       *
+	       * Many lodash methods are guarded to work as iteratees for methods like
+	       * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+	       *
+	       * The guarded methods are:
+	       * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
+	       * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
+	       * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
+	       * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new mapped array.
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * _.map([4, 8], square);
+	       * // => [16, 64]
+	       *
+	       * _.map({ 'a': 4, 'b': 8 }, square);
+	       * // => [16, 64] (iteration order is not guaranteed)
+	       *
+	       * var users = [
+	       *   { 'user': 'barney' },
+	       *   { 'user': 'fred' }
+	       * ];
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.map(users, 'user');
+	       * // => ['barney', 'fred']
+	       */
 
-	    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('')();
+	      function map(collection, iteratee) {
+	        var func = isArray(collection) ? arrayMap : baseMap;
+	        return func(collection, getIteratee(iteratee, 3));
 	      }
-	    }
+	      /**
+	       * This method is like `_.sortBy` except that it allows specifying the sort
+	       * orders of the iteratees to sort by. If `orders` is unspecified, all values
+	       * are sorted in ascending order. Otherwise, specify an order of "desc" for
+	       * descending or "asc" for ascending sort order of corresponding values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
+	       *  The iteratees to sort by.
+	       * @param {string[]} [orders] The sort orders of `iteratees`.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+	       * @returns {Array} Returns the new sorted array.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'fred',   'age': 48 },
+	       *   { 'user': 'barney', 'age': 34 },
+	       *   { 'user': 'fred',   'age': 40 },
+	       *   { 'user': 'barney', 'age': 36 }
+	       * ];
+	       *
+	       * // Sort by `user` in ascending order and by `age` in descending order.
+	       * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
+	       * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+	       */
 
-	    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);
-	    }
+	      function orderBy(collection, iteratees, orders, guard) {
+	        if (collection == null) {
+	          return [];
+	        }
 
-	    _lastLoc = loc;
-	  } // Uses `actionConnect.disabled()` to know whether this connection is ok..
+	        if (!isArray(iteratees)) {
+	          iteratees = iteratees == null ? [] : [iteratees];
+	        }
 
+	        orders = guard ? undefined$1 : orders;
 
-	  function hasRelationConflict(entity, target, edge, graph) {
-	    var testGraph = graph.update(); // copy
-	    // if snapping to way - add midpoint there and consider that the target..
+	        if (!isArray(orders)) {
+	          orders = orders == null ? [] : [orders];
+	        }
 
-	    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?
+	        return baseOrderBy(collection, iteratees, orders);
+	      }
+	      /**
+	       * Creates an array of elements split into two groups, the first of which
+	       * contains elements `predicate` returns truthy for, the second of which
+	       * contains elements `predicate` returns falsey for. The predicate is
+	       * invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the array of grouped elements.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'age': 36, 'active': false },
+	       *   { 'user': 'fred',    'age': 40, 'active': true },
+	       *   { 'user': 'pebbles', 'age': 1,  'active': false }
+	       * ];
+	       *
+	       * _.partition(users, function(o) { return o.active; });
+	       * // => objects for [['fred'], ['barney', 'pebbles']]
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.partition(users, { 'age': 1, 'active': false });
+	       * // => objects for [['pebbles'], ['barney', 'fred']]
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.partition(users, ['active', false]);
+	       * // => objects for [['barney', 'pebbles'], ['fred']]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.partition(users, 'active');
+	       * // => objects for [['fred'], ['barney', 'pebbles']]
+	       */
 
 
-	    var ids = [entity.id, target.id];
-	    return actionConnect(ids).disabled(testGraph);
-	  }
+	      var partition = createAggregator(function (result, value, key) {
+	        result[key ? 0 : 1].push(value);
+	      }, function () {
+	        return [[], []];
+	      });
+	      /**
+	       * Reduces `collection` to a value which is the accumulated result of running
+	       * each element in `collection` thru `iteratee`, where each successive
+	       * invocation is supplied the return value of the previous. If `accumulator`
+	       * is not given, the first element of `collection` is used as the initial
+	       * value. The iteratee is invoked with four arguments:
+	       * (accumulator, value, index|key, collection).
+	       *
+	       * Many lodash methods are guarded to work as iteratees for methods like
+	       * `_.reduce`, `_.reduceRight`, and `_.transform`.
+	       *
+	       * The guarded methods are:
+	       * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
+	       * and `sortBy`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {*} [accumulator] The initial value.
+	       * @returns {*} Returns the accumulated value.
+	       * @see _.reduceRight
+	       * @example
+	       *
+	       * _.reduce([1, 2], function(sum, n) {
+	       *   return sum + n;
+	       * }, 0);
+	       * // => 3
+	       *
+	       * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+	       *   (result[value] || (result[value] = [])).push(key);
+	       *   return result;
+	       * }, {});
+	       * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
+	       */
 
-	  function hasInvalidGeometry(entity, graph) {
-	    var parents = graph.parentWays(entity);
-	    var i, j, k;
+	      function reduce(collection, iteratee, accumulator) {
+	        var func = isArray(collection) ? arrayReduce : baseReduce,
+	            initAccum = arguments.length < 3;
+	        return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
+	      }
+	      /**
+	       * This method is like `_.reduce` except that it iterates over elements of
+	       * `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {*} [accumulator] The initial value.
+	       * @returns {*} Returns the accumulated value.
+	       * @see _.reduce
+	       * @example
+	       *
+	       * var array = [[0, 1], [2, 3], [4, 5]];
+	       *
+	       * _.reduceRight(array, function(flattened, other) {
+	       *   return flattened.concat(other);
+	       * }, []);
+	       * // => [4, 5, 2, 3, 0, 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);
+	      function reduceRight(collection, iteratee, accumulator) {
+	        var func = isArray(collection) ? arrayReduceRight : baseReduce,
+	            initAccum = arguments.length < 3;
+	        return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
+	      }
+	      /**
+	       * The opposite of `_.filter`; this method returns the elements of `collection`
+	       * that `predicate` does **not** return truthy for.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new filtered array.
+	       * @see _.filter
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': false },
+	       *   { 'user': 'fred',   'age': 40, 'active': true }
+	       * ];
+	       *
+	       * _.reject(users, function(o) { return !o.active; });
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.reject(users, { 'age': 40, 'active': true });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.reject(users, ['active', false]);
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.reject(users, 'active');
+	       * // => objects for ['barney']
+	       */
 
-	      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;
+	      function reject(collection, predicate) {
+	        var func = isArray(collection) ? arrayFilter : baseFilter;
+	        return func(collection, negate(getIteratee(predicate, 3)));
+	      }
+	      /**
+	       * Gets a random element from `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to sample.
+	       * @returns {*} Returns the random element.
+	       * @example
+	       *
+	       * _.sample([1, 2, 3, 4]);
+	       * // => 2
+	       */
 
-	          if (nodes.find(function (n) {
-	            return n.id === entity.id;
-	          })) {
-	            activeIndex = k;
 
-	            if (geoHasSelfIntersections(nodes, entity.id)) {
-	              return 'multipolygonMember';
-	            }
-	          }
+	      function sample(collection) {
+	        var func = isArray(collection) ? arraySample : baseSample;
+	        return func(collection);
+	      }
+	      /**
+	       * Gets `n` random elements at unique keys from `collection` up to the
+	       * size of `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to sample.
+	       * @param {number} [n=1] The number of elements to sample.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the random elements.
+	       * @example
+	       *
+	       * _.sampleSize([1, 2, 3], 2);
+	       * // => [3, 1]
+	       *
+	       * _.sampleSize([1, 2, 3], 4);
+	       * // => [2, 3, 1]
+	       */
 
-	          rings[k].coords = nodes.map(function (n) {
-	            return n.loc;
-	          });
-	        } // test active ring for intersections with other rings in the multipolygon
 
+	      function sampleSize(collection, n, guard) {
+	        if (guard ? isIterateeCall(collection, n, guard) : n === undefined$1) {
+	          n = 1;
+	        } else {
+	          n = toInteger(n);
+	        }
 
-	        for (k = 0; k < rings.length; k++) {
-	          if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
+	        var func = isArray(collection) ? arraySampleSize : baseSampleSize;
+	        return func(collection, n);
+	      }
+	      /**
+	       * Creates an array of shuffled values, using a version of the
+	       * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to shuffle.
+	       * @returns {Array} Returns the new shuffled array.
+	       * @example
+	       *
+	       * _.shuffle([1, 2, 3, 4]);
+	       * // => [4, 1, 3, 2]
+	       */
 
-	          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.
+
+	      function shuffle(collection) {
+	        var func = isArray(collection) ? arrayShuffle : baseShuffle;
+	        return func(collection);
+	      }
+	      /**
+	       * Gets the size of `collection` by returning its length for array-like
+	       * values or the number of own enumerable string keyed properties for objects.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object|string} collection The collection to inspect.
+	       * @returns {number} Returns the collection size.
+	       * @example
+	       *
+	       * _.size([1, 2, 3]);
+	       * // => 3
+	       *
+	       * _.size({ 'a': 1, 'b': 2 });
+	       * // => 2
+	       *
+	       * _.size('pebbles');
+	       * // => 7
+	       */
 
 
-	      if (activeIndex === null) {
-	        nodes = parent.nodes.map(function (nodeID) {
-	          return graph.entity(nodeID);
-	        });
+	      function size(collection) {
+	        if (collection == null) {
+	          return 0;
+	        }
 
-	        if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-	          return parent.geometry(graph);
+	        if (isArrayLike(collection)) {
+	          return isString(collection) ? stringSize(collection) : collection.length;
 	        }
-	      }
-	    }
 
-	    return false;
-	  }
+	        var tag = getTag(collection);
 
-	  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());
+	        if (tag == mapTag || tag == setTag) {
+	          return collection.size;
+	        }
 
-	    if (nudge) {
-	      startNudge(d3_event, entity, nudge);
-	    } else {
-	      stopNudge();
-	    }
-	  }
+	        return baseKeys(collection).length;
+	      }
+	      /**
+	       * Checks if `predicate` returns truthy for **any** element of `collection`.
+	       * Iteration is stopped once `predicate` returns truthy. The predicate is
+	       * invoked with three arguments: (value, index|key, collection).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {boolean} Returns `true` if any element passes the predicate check,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.some([null, 0, 'yes', false], Boolean);
+	       * // => true
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'active': true },
+	       *   { 'user': 'fred',   'active': false }
+	       * ];
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.some(users, { 'user': 'barney', 'active': false });
+	       * // => false
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.some(users, ['active', false]);
+	       * // => true
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.some(users, 'active');
+	       * // => true
+	       */
 
-	  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 some(collection, predicate, guard) {
+	        var func = isArray(collection) ? arraySome : baseSome;
 
-	    if (wasPoint) {
-	      context.enter(modeSelect(context, [entity.id]));
-	    } else {
-	      var reselection = _restoreSelectedIDs.filter(function (id) {
-	        return context.graph().hasEntity(id);
-	      });
+	        if (guard && isIterateeCall(collection, predicate, guard)) {
+	          predicate = undefined$1;
+	        }
 
-	      if (reselection.length) {
-	        context.enter(modeSelect(context, reselection));
-	      } else {
-	        context.enter(modeBrowse(context));
+	        return func(collection, getIteratee(predicate, 3));
 	      }
-	    }
-	  }
+	      /**
+	       * Creates an array of elements, sorted in ascending order by the results of
+	       * running each element in a collection thru each iteratee. This method
+	       * performs a stable sort, that is, it preserves the original sort order of
+	       * equal elements. The iteratees are invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {...(Function|Function[])} [iteratees=[_.identity]]
+	       *  The iteratees to sort by.
+	       * @returns {Array} Returns the new sorted array.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'fred',   'age': 48 },
+	       *   { 'user': 'barney', 'age': 36 },
+	       *   { 'user': 'fred',   'age': 30 },
+	       *   { 'user': 'barney', 'age': 34 }
+	       * ];
+	       *
+	       * _.sortBy(users, [function(o) { return o.user; }]);
+	       * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 30]]
+	       *
+	       * _.sortBy(users, ['user', 'age']);
+	       * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 48]]
+	       */
 
-	  function _actionBounceBack(nodeID, toLoc) {
-	    var moveNode = actionMoveNode(nodeID, toLoc);
 
-	    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);
-	    };
+	      var sortBy = baseRest(function (collection, iteratees) {
+	        if (collection == null) {
+	          return [];
+	        }
 
-	    action.transitionable = true;
-	    return action;
-	  }
+	        var length = iteratees.length;
 
-	  function cancel() {
-	    drag.cancel();
-	    context.enter(modeBrowse(context));
-	  }
+	        if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+	          iteratees = [];
+	        } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+	          iteratees = [iteratees[0]];
+	        }
 
-	  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);
+	        return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+	      });
+	      /*------------------------------------------------------------------------*/
 
-	  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);
-	  };
+	      /**
+	       * 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.
+	       */
 
-	  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();
-	  };
+	      var now = ctxNow || function () {
+	        return root.Date.now();
+	      };
+	      /*------------------------------------------------------------------------*/
 
-	  mode.selectedIDs = function () {
-	    if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
+	      /**
+	       * The opposite of `_.before`; this method creates a function that invokes
+	       * `func` once it's called `n` or more times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {number} n The number of calls before `func` is invoked.
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new restricted function.
+	       * @example
+	       *
+	       * var saves = ['profile', 'settings'];
+	       *
+	       * var done = _.after(saves.length, function() {
+	       *   console.log('done saving!');
+	       * });
+	       *
+	       * _.forEach(saves, function(type) {
+	       *   asyncSave({ 'type': type, 'complete': done });
+	       * });
+	       * // => Logs 'done saving!' after the two async saves have completed.
+	       */
 
-	    return mode;
-	  };
 
-	  mode.activeID = function () {
-	    if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
+	      function after(n, func) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	    return mode;
-	  };
+	        n = toInteger(n);
+	        return function () {
+	          if (--n < 1) {
+	            return func.apply(this, arguments);
+	          }
+	        };
+	      }
+	      /**
+	       * Creates a function that invokes `func`, with up to `n` arguments,
+	       * ignoring any additional arguments.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} func The function to cap arguments for.
+	       * @param {number} [n=func.length] The arity cap.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the new capped function.
+	       * @example
+	       *
+	       * _.map(['6', '8', '10'], _.ary(parseInt, 1));
+	       * // => [6, 8, 10]
+	       */
 
-	  mode.restoreSelectedIDs = function (_) {
-	    if (!arguments.length) return _restoreSelectedIDs;
-	    _restoreSelectedIDs = _;
-	    return mode;
-	  };
 
-	  mode.behavior = drag;
-	  return mode;
-	}
+	      function ary(func, n, guard) {
+	        n = guard ? undefined$1 : n;
+	        n = func && n == null ? func.length : n;
+	        return createWrap(func, WRAP_ARY_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, n);
+	      }
+	      /**
+	       * Creates a function that invokes `func`, with the `this` binding and arguments
+	       * of the created function, while it's called less than `n` times. Subsequent
+	       * calls to the created function return the result of the last `func` invocation.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {number} n The number of calls at which `func` is no longer invoked.
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new restricted function.
+	       * @example
+	       *
+	       * jQuery(element).on('click', _.before(5, addContactToList));
+	       * // => Allows adding up to 4 contacts to the list.
+	       */
 
-	// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
-	var NON_GENERIC = !!nativePromiseConstructor && fails(function () {
-	  nativePromiseConstructor.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
-	});
 
-	// `Promise.prototype.finally` method
-	// https://tc39.github.io/ecma262/#sec-promise.prototype.finally
-	_export({ 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
-	    );
-	  }
-	});
+	      function before(n, func) {
+	        var result;
 
-	// patch native Promise.prototype for native async functions
-	if ( typeof nativePromiseConstructor == 'function' && !nativePromiseConstructor.prototype['finally']) {
-	  redefine(nativePromiseConstructor.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
-	}
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	// @@search logic
-	fixRegexpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {
-	  return [
-	    // `String.prototype.search` method
-	    // https://tc39.github.io/ecma262/#sec-string.prototype.search
-	    function search(regexp) {
-	      var O = requireObjectCoercible(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.github.io/ecma262/#sec-regexp.prototype-@@search
-	    function (regexp) {
-	      var res = maybeCallNative(nativeSearch, regexp, this);
-	      if (res.done) return res.value;
+	        n = toInteger(n);
+	        return function () {
+	          if (--n > 0) {
+	            result = func.apply(this, arguments);
+	          }
 
-	      var rx = anObject(regexp);
-	      var S = String(this);
+	          if (n <= 1) {
+	            func = undefined$1;
+	          }
 
-	      var previousLastIndex = rx.lastIndex;
-	      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
-	      var result = regexpExecAbstract(rx, S);
-	      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
-	      return result === null ? -1 : result.index;
-	    }
-	  ];
-	});
+	          return result;
+	        };
+	      }
+	      /**
+	       * Creates a function that invokes `func` with the `this` binding of `thisArg`
+	       * and `partials` prepended to the arguments it receives.
+	       *
+	       * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
+	       * may be used as a placeholder for partially applied arguments.
+	       *
+	       * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
+	       * property of bound functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to bind.
+	       * @param {*} thisArg The `this` binding of `func`.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new bound function.
+	       * @example
+	       *
+	       * function greet(greeting, punctuation) {
+	       *   return greeting + ' ' + this.user + punctuation;
+	       * }
+	       *
+	       * var object = { 'user': 'fred' };
+	       *
+	       * var bound = _.bind(greet, object, 'hi');
+	       * bound('!');
+	       * // => 'hi fred!'
+	       *
+	       * // Bound with placeholders.
+	       * var bound = _.bind(greet, object, _, '!');
+	       * bound('hi');
+	       * // => 'hi fred!'
+	       */
 
-	function quickselect$1(arr, k, left, right, compare) {
-	  quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
-	}
 
-	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 bind = baseRest(function (func, thisArg, partials) {
+	        var bitmask = WRAP_BIND_FLAG;
 
-	    var t = arr[k];
-	    var i = left;
-	    var j = right;
-	    swap$1(arr, left, k);
-	    if (compare(arr[right], t) > 0) swap$1(arr, left, right);
+	        if (partials.length) {
+	          var holders = replaceHolders(partials, getHolder(bind));
+	          bitmask |= WRAP_PARTIAL_FLAG;
+	        }
 
-	    while (i < j) {
-	      swap$1(arr, i, j);
-	      i++;
-	      j--;
+	        return createWrap(func, bitmask, thisArg, partials, holders);
+	      });
+	      /**
+	       * Creates a function that invokes the method at `object[key]` with `partials`
+	       * prepended to the arguments it receives.
+	       *
+	       * This method differs from `_.bind` by allowing bound functions to reference
+	       * methods that may be redefined or don't yet exist. See
+	       * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
+	       * for more details.
+	       *
+	       * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for partially applied arguments.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.10.0
+	       * @category Function
+	       * @param {Object} object The object to invoke the method on.
+	       * @param {string} key The key of the method.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new bound function.
+	       * @example
+	       *
+	       * var object = {
+	       *   'user': 'fred',
+	       *   'greet': function(greeting, punctuation) {
+	       *     return greeting + ' ' + this.user + punctuation;
+	       *   }
+	       * };
+	       *
+	       * var bound = _.bindKey(object, 'greet', 'hi');
+	       * bound('!');
+	       * // => 'hi fred!'
+	       *
+	       * object.greet = function(greeting, punctuation) {
+	       *   return greeting + 'ya ' + this.user + punctuation;
+	       * };
+	       *
+	       * bound('!');
+	       * // => 'hiya fred!'
+	       *
+	       * // Bound with placeholders.
+	       * var bound = _.bindKey(object, 'greet', _, '!');
+	       * bound('hi');
+	       * // => 'hiya fred!'
+	       */
 
-	      while (compare(arr[i], t) < 0) {
-	        i++;
-	      }
+	      var bindKey = baseRest(function (object, key, partials) {
+	        var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
 
-	      while (compare(arr[j], t) > 0) {
-	        j--;
-	      }
-	    }
+	        if (partials.length) {
+	          var holders = replaceHolders(partials, getHolder(bindKey));
+	          bitmask |= WRAP_PARTIAL_FLAG;
+	        }
 
-	    if (compare(arr[left], t) === 0) swap$1(arr, left, j);else {
-	      j++;
-	      swap$1(arr, j, right);
-	    }
-	    if (j <= k) left = j + 1;
-	    if (k <= j) right = j - 1;
-	  }
-	}
+	        return createWrap(key, bitmask, object, partials, holders);
+	      });
+	      /**
+	       * Creates a function that accepts arguments of `func` and either invokes
+	       * `func` returning its result, if at least `arity` number of arguments have
+	       * been provided, or returns a function that accepts the remaining `func`
+	       * arguments, and so on. The arity of `func` may be specified if `func.length`
+	       * is not sufficient.
+	       *
+	       * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
+	       * may be used as a placeholder for provided arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of curried functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Function
+	       * @param {Function} func The function to curry.
+	       * @param {number} [arity=func.length] The arity of `func`.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the new curried function.
+	       * @example
+	       *
+	       * var abc = function(a, b, c) {
+	       *   return [a, b, c];
+	       * };
+	       *
+	       * var curried = _.curry(abc);
+	       *
+	       * curried(1)(2)(3);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(1, 2)(3);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(1, 2, 3);
+	       * // => [1, 2, 3]
+	       *
+	       * // Curried with placeholders.
+	       * curried(1)(_, 3)(2);
+	       * // => [1, 2, 3]
+	       */
 
-	function swap$1(arr, i, j) {
-	  var tmp = arr[i];
-	  arr[i] = arr[j];
-	  arr[j] = tmp;
-	}
+	      function curry(func, arity, guard) {
+	        arity = guard ? undefined$1 : arity;
+	        var result = createWrap(func, WRAP_CURRY_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, undefined$1, arity);
+	        result.placeholder = curry.placeholder;
+	        return result;
+	      }
+	      /**
+	       * This method is like `_.curry` except that arguments are applied to `func`
+	       * in the manner of `_.partialRight` instead of `_.partial`.
+	       *
+	       * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for provided arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of curried functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} func The function to curry.
+	       * @param {number} [arity=func.length] The arity of `func`.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the new curried function.
+	       * @example
+	       *
+	       * var abc = function(a, b, c) {
+	       *   return [a, b, c];
+	       * };
+	       *
+	       * var curried = _.curryRight(abc);
+	       *
+	       * curried(3)(2)(1);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(2, 3)(1);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(1, 2, 3);
+	       * // => [1, 2, 3]
+	       *
+	       * // Curried with placeholders.
+	       * curried(3)(1, _)(2);
+	       * // => [1, 2, 3]
+	       */
 
-	function defaultCompare(a, b) {
-	  return a < b ? -1 : a > b ? 1 : 0;
-	}
 
-	var RBush = /*#__PURE__*/function () {
-	  function RBush() {
-	    var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
+	      function curryRight(func, arity, guard) {
+	        arity = guard ? undefined$1 : arity;
+	        var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, undefined$1, arity);
+	        result.placeholder = curryRight.placeholder;
+	        return result;
+	      }
+	      /**
+	       * 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);
+	       */
 
-	    _classCallCheck(this, RBush);
 
-	    // 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();
-	  }
+	      function debounce(func, wait, options) {
+	        var lastArgs,
+	            lastThis,
+	            maxWait,
+	            result,
+	            timerId,
+	            lastCallTime,
+	            lastInvokeTime = 0,
+	            leading = false,
+	            maxing = false,
+	            trailing = true;
 
-	  _createClass(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 = [];
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	      while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	          var child = node.children[i];
-	          var childBBox = node.leaf ? toBBox(child) : child;
+	        wait = toNumber(wait) || 0;
 
-	          if (intersects(bbox, childBBox)) {
-	            if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
-	          }
+	        if (isObject(options)) {
+	          leading = !!options.leading;
+	          maxing = 'maxWait' in options;
+	          maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+	          trailing = 'trailing' in options ? !!options.trailing : trailing;
 	        }
 
-	        node = nodesToSearch.pop();
-	      }
+	        function invokeFunc(time) {
+	          var args = lastArgs,
+	              thisArg = lastThis;
+	          lastArgs = lastThis = undefined$1;
+	          lastInvokeTime = time;
+	          result = func.apply(thisArg, args);
+	          return result;
+	        }
 
-	      return result;
-	    }
-	  }, {
-	    key: "collides",
-	    value: function collides(bbox) {
-	      var node = this.data;
-	      if (!intersects(bbox, node)) return false;
-	      var nodesToSearch = [];
+	        function leadingEdge(time) {
+	          // Reset any `maxWait` timer.
+	          lastInvokeTime = time; // Start the timer for the trailing edge.
 
-	      while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	          var child = node.children[i];
-	          var childBBox = node.leaf ? this.toBBox(child) : child;
+	          timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-	          if (intersects(bbox, childBBox)) {
-	            if (node.leaf || contains(bbox, childBBox)) return true;
-	            nodesToSearch.push(child);
-	          }
+	          return leading ? invokeFunc(time) : result;
 	        }
 
-	        node = nodesToSearch.pop();
-	      }
+	        function remainingWait(time) {
+	          var timeSinceLastCall = time - lastCallTime,
+	              timeSinceLastInvoke = time - lastInvokeTime,
+	              timeWaiting = wait - timeSinceLastCall;
+	          return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+	        }
 
-	      return false;
-	    }
-	  }, {
-	    key: "load",
-	    value: function load(data) {
-	      if (!(data && data.length)) return this;
+	        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.
 
-	      if (data.length < this._minEntries) {
-	        for (var i = 0; i < data.length; i++) {
-	          this.insert(data[i]);
+	          return lastCallTime === undefined$1 || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
 	        }
 
-	        return this;
-	      } // recursively build the tree with the given data from scratch using OMT algorithm
+	        function timerExpired() {
+	          var time = now();
 
+	          if (shouldInvoke(time)) {
+	            return trailingEdge(time);
+	          } // Restart the timer.
 
-	      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;
-	      } 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
+	          timerId = setTimeout(timerExpired, remainingWait(time));
+	        }
 
+	        function trailingEdge(time) {
+	          timerId = undefined$1; // Only invoke if we have `lastArgs` which means `func` has been
+	          // debounced at least once.
 
-	        this._insert(node, this.data.height - node.height - 1, true);
-	      }
+	          if (trailing && lastArgs) {
+	            return invokeFunc(time);
+	          }
 
-	      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
+	          lastArgs = lastThis = undefined$1;
+	          return result;
+	        }
 
-	      while (node || path.length) {
-	        if (!node) {
-	          // go up
-	          node = path.pop();
-	          parent = path[path.length - 1];
-	          i = indexes.pop();
-	          goingUp = true;
+	        function cancel() {
+	          if (timerId !== undefined$1) {
+	            clearTimeout(timerId);
+	          }
+
+	          lastInvokeTime = 0;
+	          lastArgs = lastCallTime = lastThis = timerId = undefined$1;
 	        }
 
-	        if (node.leaf) {
-	          // check current node
-	          var index = findItem(item, node.children, equalsFn);
+	        function flush() {
+	          return timerId === undefined$1 ? result : trailingEdge(now());
+	        }
 
-	          if (index !== -1) {
-	            // item found, remove the item and condense tree upwards
-	            node.children.splice(index, 1);
-	            path.push(node);
+	        function debounced() {
+	          var time = now(),
+	              isInvoking = shouldInvoke(time);
+	          lastArgs = arguments;
+	          lastThis = this;
+	          lastCallTime = time;
 
-	            this._condense(path);
+	          if (isInvoking) {
+	            if (timerId === undefined$1) {
+	              return leadingEdge(lastCallTime);
+	            }
 
-	            return this;
+	            if (maxing) {
+	              // Handle invocations in a tight loop.
+	              clearTimeout(timerId);
+	              timerId = setTimeout(timerExpired, wait);
+	              return invokeFunc(lastCallTime);
+	            }
 	          }
-	        }
 
-	        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
+	          if (timerId === undefined$1) {
+	            timerId = setTimeout(timerExpired, wait);
+	          }
+
+	          return result;
+	        }
 
+	        debounced.cancel = cancel;
+	        debounced.flush = flush;
+	        return debounced;
 	      }
+	      /**
+	       * Defers invoking the `func` until the current call stack has cleared. Any
+	       * additional arguments are provided to `func` when it's invoked.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to defer.
+	       * @param {...*} [args] The arguments to invoke `func` with.
+	       * @returns {number} Returns the timer id.
+	       * @example
+	       *
+	       * _.defer(function(text) {
+	       *   console.log(text);
+	       * }, 'deferred');
+	       * // => Logs 'deferred' after one millisecond.
+	       */
 
-	      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 = [];
 
-	      while (node) {
-	        if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
-	        node = nodesToSearch.pop();
-	      }
+	      var defer = baseRest(function (func, args) {
+	        return baseDelay(func, 1, args);
+	      });
+	      /**
+	       * Invokes `func` after `wait` milliseconds. Any additional arguments are
+	       * provided to `func` when it's invoked.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to delay.
+	       * @param {number} wait The number of milliseconds to delay invocation.
+	       * @param {...*} [args] The arguments to invoke `func` with.
+	       * @returns {number} Returns the timer id.
+	       * @example
+	       *
+	       * _.delay(function(text) {
+	       *   console.log(text);
+	       * }, 1000, 'later');
+	       * // => Logs 'later' after one second.
+	       */
 
-	      return result;
-	    }
-	  }, {
-	    key: "_build",
-	    value: function _build(items, left, right, height) {
-	      var N = right - left + 1;
-	      var M = this._maxEntries;
-	      var node;
+	      var delay = baseRest(function (func, wait, args) {
+	        return baseDelay(func, toNumber(wait) || 0, args);
+	      });
+	      /**
+	       * Creates a function that invokes `func` with arguments reversed.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Function
+	       * @param {Function} func The function to flip arguments for.
+	       * @returns {Function} Returns the new flipped function.
+	       * @example
+	       *
+	       * var flipped = _.flip(function() {
+	       *   return _.toArray(arguments);
+	       * });
+	       *
+	       * flipped('a', 'b', 'c', 'd');
+	       * // => ['d', 'c', 'b', 'a']
+	       */
+
+	      function flip(func) {
+	        return createWrap(func, WRAP_FLIP_FLAG);
+	      }
+	      /**
+	       * Creates a function that memoizes the result of `func`. If `resolver` is
+	       * provided, it determines the cache key for storing the result based on the
+	       * arguments provided to the memoized function. By default, the first argument
+	       * provided to the memoized function is used as the map cache key. The `func`
+	       * is invoked with the `this` binding of the memoized function.
+	       *
+	       * **Note:** The cache is exposed as the `cache` property on the memoized
+	       * function. Its creation may be customized by replacing the `_.memoize.Cache`
+	       * constructor with one whose instances implement the
+	       * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
+	       * method interface of `clear`, `delete`, `get`, `has`, and `set`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to have its output memoized.
+	       * @param {Function} [resolver] The function to resolve the cache key.
+	       * @returns {Function} Returns the new memoized function.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2 };
+	       * var other = { 'c': 3, 'd': 4 };
+	       *
+	       * var values = _.memoize(_.values);
+	       * values(object);
+	       * // => [1, 2]
+	       *
+	       * values(other);
+	       * // => [3, 4]
+	       *
+	       * object.a = 2;
+	       * values(object);
+	       * // => [1, 2]
+	       *
+	       * // Modify the result cache.
+	       * values.cache.set(object, ['a', 'b']);
+	       * values(object);
+	       * // => ['a', 'b']
+	       *
+	       * // Replace `_.memoize.Cache`.
+	       * _.memoize.Cache = WeakMap;
+	       */
 
-	      if (N <= M) {
-	        // reached leaf level; return leaf
-	        node = createNode(items.slice(left, right + 1));
-	        calcBBox(node, this.toBBox);
-	        return node;
-	      }
 
-	      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
+	      function memoize(func, resolver) {
+	        if (typeof func != 'function' || resolver != null && typeof resolver != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	        M = Math.ceil(N / Math.pow(M, height - 1));
-	      }
+	        var memoized = function memoized() {
+	          var args = arguments,
+	              key = resolver ? resolver.apply(this, args) : args[0],
+	              cache = memoized.cache;
 
-	      node = createNode([]);
-	      node.leaf = false;
-	      node.height = height; // split the items into M mostly square tiles
+	          if (cache.has(key)) {
+	            return cache.get(key);
+	          }
 
-	      var N2 = Math.ceil(N / M);
-	      var N1 = N2 * Math.ceil(Math.sqrt(M));
-	      multiSelect(items, left, right, N1, this.compareMinX);
+	          var result = func.apply(this, args);
+	          memoized.cache = cache.set(key, result) || cache;
+	          return result;
+	        };
 
-	      for (var i = left; i <= right; i += N1) {
-	        var right2 = Math.min(i + N1 - 1, right);
-	        multiSelect(items, i, right2, N2, this.compareMinY);
+	        memoized.cache = new (memoize.Cache || MapCache)();
+	        return memoized;
+	      } // Expose `MapCache`.
 
-	        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));
+	      memoize.Cache = MapCache;
+	      /**
+	       * Creates a function that negates the result of the predicate `func`. The
+	       * `func` predicate is invoked with the `this` binding and arguments of the
+	       * created function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} predicate The predicate to negate.
+	       * @returns {Function} Returns the new negated function.
+	       * @example
+	       *
+	       * function isEven(n) {
+	       *   return n % 2 == 0;
+	       * }
+	       *
+	       * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+	       * // => [1, 3, 5]
+	       */
+
+	      function negate(predicate) {
+	        if (typeof predicate != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
 	        }
-	      }
 
-	      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 function () {
+	          var args = arguments;
 
-	        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
+	          switch (args.length) {
+	            case 0:
+	              return !predicate.call(this);
 
-	          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;
-	            }
+	            case 1:
+	              return !predicate.call(this, args[0]);
+
+	            case 2:
+	              return !predicate.call(this, args[0], args[1]);
+
+	            case 3:
+	              return !predicate.call(this, args[0], args[1], args[2]);
 	          }
-	        }
 
-	        node = targetNode || node.children[0];
+	          return !predicate.apply(this, args);
+	        };
 	      }
+	      /**
+	       * Creates a function that is restricted to invoking `func` once. Repeat calls
+	       * to the function return the value of the first invocation. The `func` is
+	       * invoked with the `this` binding and arguments of the created function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new restricted function.
+	       * @example
+	       *
+	       * var initialize = _.once(createApplication);
+	       * initialize();
+	       * initialize();
+	       * // => `createApplication` is invoked once
+	       */
 
-	      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 node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
+	      function once(func) {
+	        return before(2, func);
+	      }
+	      /**
+	       * Creates a function that invokes `func` with its arguments transformed.
+	       *
+	       * @static
+	       * @since 4.0.0
+	       * @memberOf _
+	       * @category Function
+	       * @param {Function} func The function to wrap.
+	       * @param {...(Function|Function[])} [transforms=[_.identity]]
+	       *  The argument transforms.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * function doubled(n) {
+	       *   return n * 2;
+	       * }
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var func = _.overArgs(function(x, y) {
+	       *   return [x, y];
+	       * }, [square, doubled]);
+	       *
+	       * func(9, 3);
+	       * // => [81, 6]
+	       *
+	       * func(10, 5);
+	       * // => [100, 10]
+	       */
 
 
-	      node.children.push(item);
-	      extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
+	      var overArgs = castRest(function (func, transforms) {
+	        transforms = transforms.length == 1 && isArray(transforms[0]) ? arrayMap(transforms[0], baseUnary(getIteratee())) : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
+	        var funcsLength = transforms.length;
+	        return baseRest(function (args) {
+	          var index = -1,
+	              length = nativeMin(args.length, funcsLength);
 
-	      while (level >= 0) {
-	        if (insertPath[level].children.length > this._maxEntries) {
-	          this._split(insertPath, level);
+	          while (++index < length) {
+	            args[index] = transforms[index].call(this, args[index]);
+	          }
 
-	          level--;
-	        } else break;
-	      } // adjust bboxes along the insertion path
+	          return apply(func, this, args);
+	        });
+	      });
+	      /**
+	       * Creates a function that invokes `func` with `partials` prepended to the
+	       * arguments it receives. This method is like `_.bind` except it does **not**
+	       * alter the `this` binding.
+	       *
+	       * The `_.partial.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for partially applied arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of partially
+	       * applied functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.2.0
+	       * @category Function
+	       * @param {Function} func The function to partially apply arguments to.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new partially applied function.
+	       * @example
+	       *
+	       * function greet(greeting, name) {
+	       *   return greeting + ' ' + name;
+	       * }
+	       *
+	       * var sayHelloTo = _.partial(greet, 'hello');
+	       * sayHelloTo('fred');
+	       * // => 'hello fred'
+	       *
+	       * // Partially applied with placeholders.
+	       * var greetFred = _.partial(greet, _, 'fred');
+	       * greetFred('hi');
+	       * // => 'hi fred'
+	       */
 
+	      var partial = baseRest(function (func, partials) {
+	        var holders = replaceHolders(partials, getHolder(partial));
+	        return createWrap(func, WRAP_PARTIAL_FLAG, undefined$1, partials, holders);
+	      });
+	      /**
+	       * This method is like `_.partial` except that partially applied arguments
+	       * are appended to the arguments it receives.
+	       *
+	       * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for partially applied arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of partially
+	       * applied functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Function
+	       * @param {Function} func The function to partially apply arguments to.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new partially applied function.
+	       * @example
+	       *
+	       * function greet(greeting, name) {
+	       *   return greeting + ' ' + name;
+	       * }
+	       *
+	       * var greetFred = _.partialRight(greet, 'fred');
+	       * greetFred('hi');
+	       * // => 'hi fred'
+	       *
+	       * // Partially applied with placeholders.
+	       * var sayHelloTo = _.partialRight(greet, 'hello', _);
+	       * sayHelloTo('fred');
+	       * // => 'hello fred'
+	       */
 
-	      this._adjustParentBBoxes(bbox, insertPath, level);
-	    } // split overflowed node into two
+	      var partialRight = baseRest(function (func, partials) {
+	        var holders = replaceHolders(partials, getHolder(partialRight));
+	        return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined$1, partials, holders);
+	      });
+	      /**
+	       * Creates a function that invokes `func` with arguments arranged according
+	       * to the specified `indexes` where the argument value at the first index is
+	       * provided as the first argument, the argument value at the second index is
+	       * provided as the second argument, and so on.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} func The function to rearrange arguments for.
+	       * @param {...(number|number[])} indexes The arranged argument indexes.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var rearged = _.rearg(function(a, b, c) {
+	       *   return [a, b, c];
+	       * }, [2, 0, 1]);
+	       *
+	       * rearged('b', 'c', 'a')
+	       * // => ['a', 'b', 'c']
+	       */
 
-	  }, {
-	    key: "_split",
-	    value: function _split(insertPath, level) {
-	      var node = insertPath[level];
-	      var M = node.children.length;
-	      var m = this._minEntries;
+	      var rearg = flatRest(function (func, indexes) {
+	        return createWrap(func, WRAP_REARG_FLAG, undefined$1, undefined$1, undefined$1, indexes);
+	      });
+	      /**
+	       * Creates a function that invokes `func` with the `this` binding of the
+	       * created function and arguments from `start` and beyond provided as
+	       * an array.
+	       *
+	       * **Note:** This method is based on the
+	       * [rest parameter](https://mdn.io/rest_parameters).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Function
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @param {number} [start=func.length-1] The start position of the rest parameter.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var say = _.rest(function(what, names) {
+	       *   return what + ' ' + _.initial(names).join(', ') +
+	       *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
+	       * });
+	       *
+	       * say('hello', 'fred', 'barney', 'pebbles');
+	       * // => 'hello fred, barney, & pebbles'
+	       */
 
-	      this._chooseSplitAxis(node, m, M);
+	      function rest(func, start) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	      var splitIndex = this._chooseSplitIndex(node, m, M);
+	        start = start === undefined$1 ? start : toInteger(start);
+	        return baseRest(func, start);
+	      }
+	      /**
+	       * Creates a function that invokes `func` with the `this` binding of the
+	       * create function and an array of arguments much like
+	       * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
+	       *
+	       * **Note:** This method is based on the
+	       * [spread operator](https://mdn.io/spread_operator).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Function
+	       * @param {Function} func The function to spread arguments over.
+	       * @param {number} [start=0] The start position of the spread.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var say = _.spread(function(who, what) {
+	       *   return who + ' says ' + what;
+	       * });
+	       *
+	       * say(['fred', 'hello']);
+	       * // => 'fred says hello'
+	       *
+	       * var numbers = Promise.all([
+	       *   Promise.resolve(40),
+	       *   Promise.resolve(36)
+	       * ]);
+	       *
+	       * numbers.then(_.spread(function(x, y) {
+	       *   return x + y;
+	       * }));
+	       * // => a Promise of 76
+	       */
 
-	      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
+	      function spread(func, start) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	        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;
+	        start = start == null ? 0 : nativeMax(toInteger(start), 0);
+	        return baseRest(function (args) {
+	          var array = args[start],
+	              otherArgs = castSlice(args, 0, start);
+
+	          if (array) {
+	            arrayPush(otherArgs, array);
 	          }
+
+	          return apply(func, this, otherArgs);
+	        });
+	      }
+	      /**
+	       * 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(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
+	        });
 	      }
+	      /**
+	       * Creates a function that accepts up to one argument, ignoring any
+	       * additional arguments.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Function
+	       * @param {Function} func The function to cap arguments for.
+	       * @returns {Function} Returns the new capped function.
+	       * @example
+	       *
+	       * _.map(['6', '8', '10'], _.unary(parseInt));
+	       * // => [6, 8, 10]
+	       */
 
-	      return index || M - m;
-	    } // sorts node children by the best axis for split
 
-	  }, {
-	    key: "_chooseSplitAxis",
-	    value: function _chooseSplitAxis(node, m, M) {
-	      var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-	      var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
+	      function unary(func) {
+	        return ary(func, 1);
+	      }
+	      /**
+	       * Creates a function that provides `value` to `wrapper` as its first
+	       * argument. Any additional arguments provided to the function are appended
+	       * to those provided to the `wrapper`. The wrapper is invoked with the `this`
+	       * binding of the created function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {*} value The value to wrap.
+	       * @param {Function} [wrapper=identity] The wrapper function.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var p = _.wrap(_.escape, function(func, text) {
+	       *   return '<p>' + func(text) + '</p>';
+	       * });
+	       *
+	       * p('fred, barney, & pebbles');
+	       * // => '<p>fred, barney, &amp; pebbles</p>'
+	       */
 
-	      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,
-	      // otherwise it's already sorted by minY
+	      function wrap(value, wrapper) {
+	        return partial(castFunction(wrapper), value);
+	      }
+	      /*------------------------------------------------------------------------*/
 
+	      /**
+	       * Casts `value` as an array if it's not one.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.4.0
+	       * @category Lang
+	       * @param {*} value The value to inspect.
+	       * @returns {Array} Returns the cast array.
+	       * @example
+	       *
+	       * _.castArray(1);
+	       * // => [1]
+	       *
+	       * _.castArray({ 'a': 1 });
+	       * // => [{ 'a': 1 }]
+	       *
+	       * _.castArray('abc');
+	       * // => ['abc']
+	       *
+	       * _.castArray(null);
+	       * // => [null]
+	       *
+	       * _.castArray(undefined);
+	       * // => [undefined]
+	       *
+	       * _.castArray();
+	       * // => []
+	       *
+	       * var array = [1, 2, 3];
+	       * console.log(_.castArray(array) === array);
+	       * // => true
+	       */
 
-	      if (xMargin < yMargin) node.children.sort(compareMinX);
-	    } // total margin of all possible split distributions where each node is at least m full
 
-	  }, {
-	    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);
+	      function castArray() {
+	        if (!arguments.length) {
+	          return [];
+	        }
 
-	      for (var i = m; i < M - m; i++) {
-	        var child = node.children[i];
-	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-	        margin += bboxMargin(leftBBox);
+	        var value = arguments[0];
+	        return isArray(value) ? value : [value];
 	      }
+	      /**
+	       * Creates a shallow clone of `value`.
+	       *
+	       * **Note:** This method is loosely based on the
+	       * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
+	       * and supports cloning arrays, array buffers, booleans, date objects, maps,
+	       * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
+	       * arrays. The own enumerable properties of `arguments` objects are cloned
+	       * as plain objects. An empty object is returned for uncloneable values such
+	       * as error objects, functions, DOM nodes, and WeakMaps.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to clone.
+	       * @returns {*} Returns the cloned value.
+	       * @see _.cloneDeep
+	       * @example
+	       *
+	       * var objects = [{ 'a': 1 }, { 'b': 2 }];
+	       *
+	       * var shallow = _.clone(objects);
+	       * console.log(shallow[0] === objects[0]);
+	       * // => true
+	       */
 
-	      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 clone(value) {
+	        return baseClone(value, CLONE_SYMBOLS_FLAG);
 	      }
+	      /**
+	       * This method is like `_.clone` except that it accepts `customizer` which
+	       * is invoked to produce the cloned value. If `customizer` returns `undefined`,
+	       * cloning is handled by the method instead. The `customizer` is invoked with
+	       * up to four arguments; (value [, index|key, object, stack]).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to clone.
+	       * @param {Function} [customizer] The function to customize cloning.
+	       * @returns {*} Returns the cloned value.
+	       * @see _.cloneDeepWith
+	       * @example
+	       *
+	       * function customizer(value) {
+	       *   if (_.isElement(value)) {
+	       *     return value.cloneNode(false);
+	       *   }
+	       * }
+	       *
+	       * var el = _.cloneWith(document.body, customizer);
+	       *
+	       * console.log(el === document.body);
+	       * // => false
+	       * console.log(el.nodeName);
+	       * // => 'BODY'
+	       * console.log(el.childNodes.length);
+	       * // => 0
+	       */
 
-	      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);
+
+	      function cloneWith(value, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
 	      }
-	    }
-	  }, {
-	    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);
+	      /**
+	       * This method is like `_.clone` except that it recursively clones `value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Lang
+	       * @param {*} value The value to recursively clone.
+	       * @returns {*} Returns the deep cloned value.
+	       * @see _.clone
+	       * @example
+	       *
+	       * var objects = [{ 'a': 1 }, { 'b': 2 }];
+	       *
+	       * var deep = _.cloneDeep(objects);
+	       * console.log(deep[0] === objects[0]);
+	       * // => false
+	       */
+
+
+	      function cloneDeep(value) {
+	        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
 	      }
-	    }
-	  }]);
+	      /**
+	       * This method is like `_.cloneWith` except that it recursively clones `value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to recursively clone.
+	       * @param {Function} [customizer] The function to customize cloning.
+	       * @returns {*} Returns the deep cloned value.
+	       * @see _.cloneWith
+	       * @example
+	       *
+	       * function customizer(value) {
+	       *   if (_.isElement(value)) {
+	       *     return value.cloneNode(true);
+	       *   }
+	       * }
+	       *
+	       * var el = _.cloneDeepWith(document.body, customizer);
+	       *
+	       * console.log(el === document.body);
+	       * // => false
+	       * console.log(el.nodeName);
+	       * // => 'BODY'
+	       * console.log(el.childNodes.length);
+	       * // => 20
+	       */
 
-	  return RBush;
-	}();
 
-	function findItem(item, items, equalsFn) {
-	  if (!equalsFn) return items.indexOf(item);
+	      function cloneDeepWith(value, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
+	      }
+	      /**
+	       * Checks if `object` conforms to `source` by invoking the predicate
+	       * properties of `source` with the corresponding property values of `object`.
+	       *
+	       * **Note:** This method is equivalent to `_.conforms` when `source` is
+	       * partially applied.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.14.0
+	       * @category Lang
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2 };
+	       *
+	       * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
+	       * // => true
+	       *
+	       * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
+	       * // => false
+	       */
 
-	  for (var i = 0; i < items.length; i++) {
-	    if (equalsFn(item, items[i])) return i;
-	  }
 
-	  return -1;
-	} // calculate node's bbox from bboxes of its children
+	      function conformsTo(object, source) {
+	        return source == null || baseConformsTo(object, source, keys(source));
+	      }
+	      /**
+	       * Performs a
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * comparison between two values to determine if they are equivalent.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1 };
+	       * var other = { 'a': 1 };
+	       *
+	       * _.eq(object, object);
+	       * // => true
+	       *
+	       * _.eq(object, other);
+	       * // => false
+	       *
+	       * _.eq('a', 'a');
+	       * // => true
+	       *
+	       * _.eq('a', Object('a'));
+	       * // => false
+	       *
+	       * _.eq(NaN, NaN);
+	       * // => true
+	       */
 
 
-	function calcBBox(node, toBBox) {
-	  distBBox(node, 0, node.children.length, toBBox, node);
-	} // min bounding rectangle of node children from k to p-1
+	      function eq(value, other) {
+	        return value === other || value !== value && other !== other;
+	      }
+	      /**
+	       * Checks if `value` is greater than `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is greater than `other`,
+	       *  else `false`.
+	       * @see _.lt
+	       * @example
+	       *
+	       * _.gt(3, 1);
+	       * // => true
+	       *
+	       * _.gt(3, 3);
+	       * // => false
+	       *
+	       * _.gt(1, 3);
+	       * // => false
+	       */
 
 
-	function distBBox(node, k, p, toBBox, destNode) {
-	  if (!destNode) destNode = createNode(null);
-	  destNode.minX = Infinity;
-	  destNode.minY = Infinity;
-	  destNode.maxX = -Infinity;
-	  destNode.maxY = -Infinity;
+	      var gt = createRelationalOperation(baseGt);
+	      /**
+	       * Checks if `value` is greater than or equal to `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is greater than or equal to
+	       *  `other`, else `false`.
+	       * @see _.lte
+	       * @example
+	       *
+	       * _.gte(3, 1);
+	       * // => true
+	       *
+	       * _.gte(3, 3);
+	       * // => true
+	       *
+	       * _.gte(1, 3);
+	       * // => false
+	       */
 
-	  for (var i = k; i < p; i++) {
-	    var child = node.children[i];
-	    extend$1(destNode, node.leaf ? toBBox(child) : child);
-	  }
+	      var gte = createRelationalOperation(function (value, other) {
+	        return value >= other;
+	      });
+	      /**
+	       * Checks if `value` is likely an `arguments` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.isArguments(function() { return arguments; }());
+	       * // => true
+	       *
+	       * _.isArguments([1, 2, 3]);
+	       * // => false
+	       */
 
-	  return destNode;
-	}
+	      var isArguments = baseIsArguments(function () {
+	        return arguments;
+	      }()) ? baseIsArguments : function (value) {
+	        return isObjectLike(value) && hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
+	      };
+	      /**
+	       * Checks if `value` is classified as an `Array` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+	       * @example
+	       *
+	       * _.isArray([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isArray(document.body.children);
+	       * // => false
+	       *
+	       * _.isArray('abc');
+	       * // => false
+	       *
+	       * _.isArray(_.noop);
+	       * // => false
+	       */
 
-	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;
-	}
+	      var isArray = Array.isArray;
+	      /**
+	       * Checks if `value` is classified as an `ArrayBuffer` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+	       * @example
+	       *
+	       * _.isArrayBuffer(new ArrayBuffer(2));
+	       * // => true
+	       *
+	       * _.isArrayBuffer(new Array(2));
+	       * // => false
+	       */
 
-	function compareNodeMinX(a, b) {
-	  return a.minX - b.minX;
-	}
+	      var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
+	      /**
+	       * Checks if `value` is array-like. A value is considered array-like if it's
+	       * not a function and has a `value.length` that's an integer greater than or
+	       * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+	       * @example
+	       *
+	       * _.isArrayLike([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isArrayLike(document.body.children);
+	       * // => true
+	       *
+	       * _.isArrayLike('abc');
+	       * // => true
+	       *
+	       * _.isArrayLike(_.noop);
+	       * // => false
+	       */
 
-	function compareNodeMinY(a, b) {
-	  return a.minY - b.minY;
-	}
+	      function isArrayLike(value) {
+	        return value != null && isLength(value.length) && !isFunction(value);
+	      }
+	      /**
+	       * This method is like `_.isArrayLike` except that it also checks if `value`
+	       * is an object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array-like object,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.isArrayLikeObject([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isArrayLikeObject(document.body.children);
+	       * // => true
+	       *
+	       * _.isArrayLikeObject('abc');
+	       * // => false
+	       *
+	       * _.isArrayLikeObject(_.noop);
+	       * // => false
+	       */
 
-	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 isArrayLikeObject(value) {
+	        return isObjectLike(value) && isArrayLike(value);
+	      }
+	      /**
+	       * Checks if `value` is classified as a boolean primitive or object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
+	       * @example
+	       *
+	       * _.isBoolean(false);
+	       * // => true
+	       *
+	       * _.isBoolean(null);
+	       * // => false
+	       */
 
-	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);
-	}
+	      function isBoolean(value) {
+	        return value === true || value === false || isObjectLike(value) && baseGetTag(value) == boolTag;
+	      }
+	      /**
+	       * Checks if `value` is a buffer.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+	       * @example
+	       *
+	       * _.isBuffer(new Buffer(2));
+	       * // => true
+	       *
+	       * _.isBuffer(new Uint8Array(2));
+	       * // => false
+	       */
 
-	function contains(a, b) {
-	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-	}
 
-	function intersects(a, b) {
-	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-	}
+	      var isBuffer = nativeIsBuffer || stubFalse;
+	      /**
+	       * Checks if `value` is classified as a `Date` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+	       * @example
+	       *
+	       * _.isDate(new Date);
+	       * // => true
+	       *
+	       * _.isDate('Mon April 23 2012');
+	       * // => false
+	       */
 
-	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
+	      var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
+	      /**
+	       * Checks if `value` is likely a DOM element.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+	       * @example
+	       *
+	       * _.isElement(document.body);
+	       * // => true
+	       *
+	       * _.isElement('<body>');
+	       * // => false
+	       */
 
+	      function isElement(value) {
+	        return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
+	      }
+	      /**
+	       * Checks if `value` is an empty object, collection, map, or set.
+	       *
+	       * Objects are considered empty if they have no own enumerable string keyed
+	       * properties.
+	       *
+	       * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+	       * jQuery-like collections are considered empty if they have a `length` of `0`.
+	       * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+	       * @example
+	       *
+	       * _.isEmpty(null);
+	       * // => true
+	       *
+	       * _.isEmpty(true);
+	       * // => true
+	       *
+	       * _.isEmpty(1);
+	       * // => true
+	       *
+	       * _.isEmpty([1, 2, 3]);
+	       * // => false
+	       *
+	       * _.isEmpty({ 'a': 1 });
+	       * // => false
+	       */
 
-	function multiSelect(arr, left, right, n, compare) {
-	  var stack = [left, right];
 
-	  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$1(arr, mid, left, right, compare);
-	    stack.push(left, mid, mid, right);
-	  }
-	}
+	      function isEmpty(value) {
+	        if (value == null) {
+	          return true;
+	        }
 
-	var tiler = utilTiler();
-	var dispatch$1 = dispatch('loaded');
-	var _tileZoom = 14;
-	var _krUrlRoot = 'https://www.keepright.at';
-	var _krData = {
-	  errorTypes: {},
-	  localizeStrings: {}
-	}; // This gets reassigned if reset
+	        if (isArrayLike(value) && (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' || isBuffer(value) || isTypedArray(value) || isArguments(value))) {
+	          return !value.length;
+	        }
 
-	var _cache;
+	        var tag = getTag(value);
 
-	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];
+	        if (tag == mapTag || tag == setTag) {
+	          return !value.size;
+	        }
 
-	function abortRequest(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	        if (isPrototype(value)) {
+	          return !baseKeys(value).length;
+	        }
 
-	function abortUnwantedRequests(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) {
-	      return k === tile.id;
-	    });
+	        for (var key in value) {
+	          if (hasOwnProperty.call(value, key)) {
+	            return false;
+	          }
+	        }
 
-	    if (!wanted) {
-	      abortRequest(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
-	  });
-	}
+	        return true;
+	      }
+	      /**
+	       * Performs a deep comparison between two values to determine if they are
+	       * equivalent.
+	       *
+	       * **Note:** This method supports comparing arrays, array buffers, booleans,
+	       * date objects, error objects, maps, numbers, `Object` objects, regexes,
+	       * sets, strings, symbols, and typed arrays. `Object` objects are compared
+	       * by their own, not inherited, enumerable properties. Functions and DOM
+	       * nodes are compared by strict equality, i.e. `===`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1 };
+	       * var other = { 'a': 1 };
+	       *
+	       * _.isEqual(object, other);
+	       * // => true
+	       *
+	       * object === other;
+	       * // => false
+	       */
 
-	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
 
+	      function isEqual(value, other) {
+	        return baseIsEqual(value, other);
+	      }
+	      /**
+	       * This method is like `_.isEqual` except that it accepts `customizer` which
+	       * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+	       * are handled by the method instead. The `customizer` is invoked with up to
+	       * six arguments: (objValue, othValue [, index|key, object, other, stack]).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       * @example
+	       *
+	       * function isGreeting(value) {
+	       *   return /^h(?:i|ello)$/.test(value);
+	       * }
+	       *
+	       * function customizer(objValue, othValue) {
+	       *   if (isGreeting(objValue) && isGreeting(othValue)) {
+	       *     return true;
+	       *   }
+	       * }
+	       *
+	       * var array = ['hello', 'goodbye'];
+	       * var other = ['hi', 'goodbye'];
+	       *
+	       * _.isEqualWith(array, other, customizer);
+	       * // => true
+	       */
 
-	function updateRtree(item, replace) {
-	  _cache.rtree.remove(item, function (a, b) {
-	    return a.data.id === b.data.id;
-	  });
 
-	  if (replace) {
-	    _cache.rtree.insert(item);
-	  }
-	}
+	      function isEqualWith(value, other, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        var result = customizer ? customizer(value, other) : undefined$1;
+	        return result === undefined$1 ? baseIsEqual(value, other, undefined$1, customizer) : !!result;
+	      }
+	      /**
+	       * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+	       * `SyntaxError`, `TypeError`, or `URIError` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+	       * @example
+	       *
+	       * _.isError(new Error);
+	       * // => true
+	       *
+	       * _.isError(Error);
+	       * // => false
+	       */
 
-	function tokenReplacements(d) {
-	  if (!(d instanceof QAItem)) return;
-	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-	  var replacements = {};
-	  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 */
+	      function isError(value) {
+	        if (!isObjectLike(value)) {
+	          return false;
+	        }
 
-	    return;
-	  } // some descriptions are just fixed text
+	        var tag = baseGetTag(value);
+	        return tag == errorTag || tag == domExcTag || typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value);
+	      }
+	      /**
+	       * Checks if `value` is a finite primitive number.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isFinite`](https://mdn.io/Number/isFinite).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+	       * @example
+	       *
+	       * _.isFinite(3);
+	       * // => true
+	       *
+	       * _.isFinite(Number.MIN_VALUE);
+	       * // => true
+	       *
+	       * _.isFinite(Infinity);
+	       * // => false
+	       *
+	       * _.isFinite('3');
+	       * // => false
+	       */
 
 
-	  if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
+	      function isFinite(value) {
+	        return typeof value == 'number' && nativeIsFinite(value);
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Function` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+	       * @example
+	       *
+	       * _.isFunction(_);
+	       * // => true
+	       *
+	       * _.isFunction(/abc/);
+	       * // => false
+	       */
 
-	  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 */
+	      function isFunction(value) {
+	        if (!isObject(value)) {
+	          return false;
+	        } // The use of `Object#toString` avoids issues with the `typeof` operator
+	        // in Safari 9 which returns 'object' for typed arrays and other constructors.
 
-	    return;
-	  }
 
-	  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] : '';
+	        var tag = baseGetTag(value);
+	        return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
+	      }
+	      /**
+	       * Checks if `value` is an integer.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isInteger`](https://mdn.io/Number/isInteger).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
+	       * @example
+	       *
+	       * _.isInteger(3);
+	       * // => true
+	       *
+	       * _.isInteger(Number.MIN_VALUE);
+	       * // => false
+	       *
+	       * _.isInteger(Infinity);
+	       * // => false
+	       *
+	       * _.isInteger('3');
+	       * // => false
+	       */
 
-	    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 isInteger(value) {
+	        return typeof value == 'number' && value == toInteger(value);
 	      }
-	    }
+	      /**
+	       * Checks if `value` is a valid array-like length.
+	       *
+	       * **Note:** This method is loosely based on
+	       * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+	       * @example
+	       *
+	       * _.isLength(3);
+	       * // => true
+	       *
+	       * _.isLength(Number.MIN_VALUE);
+	       * // => false
+	       *
+	       * _.isLength(Infinity);
+	       * // => false
+	       *
+	       * _.isLength('3');
+	       * // => false
+	       */
 
-	    replacements['var' + i] = capture;
-	  }
 
-	  return replacements;
-	}
+	      function isLength(value) {
+	        return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+	      }
+	      /**
+	       * 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 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]);
-	  }
+	      function isObject(value) {
+	        var type = _typeof(value);
 
-	  switch (idType) {
-	    // link a string like "this node"
-	    case 'this':
-	      capture = linkErrorObject(capture);
-	      break;
+	        return value != null && (type == 'object' || type == 'function');
+	      }
+	      /**
+	       * 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
+	       */
 
-	    case 'url':
-	      capture = linkURL(capture);
-	      break;
-	    // link an entity ID
 
-	    case 'n':
-	    case 'w':
-	    case 'r':
-	      capture = linkEntity(idType + capture);
-	      break;
-	    // some errors have more complex ID lists/variance
+	      function isObjectLike(value) {
+	        return value != null && _typeof(value) == 'object';
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Map` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+	       * @example
+	       *
+	       * _.isMap(new Map);
+	       * // => true
+	       *
+	       * _.isMap(new WeakMap);
+	       * // => false
+	       */
 
-	    case '20':
-	      capture = parse20(capture);
-	      break;
 
-	    case '211':
-	      capture = parse211(capture);
-	      break;
+	      var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
+	      /**
+	       * Performs a partial deep comparison between `object` and `source` to
+	       * determine if `object` contains equivalent property values.
+	       *
+	       * **Note:** This method is equivalent to `_.matches` when `source` is
+	       * partially applied.
+	       *
+	       * Partial comparisons will match empty array and empty object `source`
+	       * values against any array or object value, respectively. See `_.isEqual`
+	       * for a list of supported value comparisons.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property values to match.
+	       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2 };
+	       *
+	       * _.isMatch(object, { 'b': 2 });
+	       * // => true
+	       *
+	       * _.isMatch(object, { 'b': 1 });
+	       * // => false
+	       */
 
-	    case '231':
-	      capture = parse231(capture);
-	      break;
+	      function isMatch(object, source) {
+	        return object === source || baseIsMatch(object, source, getMatchData(source));
+	      }
+	      /**
+	       * This method is like `_.isMatch` except that it accepts `customizer` which
+	       * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+	       * are handled by the method instead. The `customizer` is invoked with five
+	       * arguments: (objValue, srcValue, index|key, object, source).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property values to match.
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+	       * @example
+	       *
+	       * function isGreeting(value) {
+	       *   return /^h(?:i|ello)$/.test(value);
+	       * }
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   if (isGreeting(objValue) && isGreeting(srcValue)) {
+	       *     return true;
+	       *   }
+	       * }
+	       *
+	       * var object = { 'greeting': 'hello' };
+	       * var source = { 'greeting': 'hi' };
+	       *
+	       * _.isMatchWith(object, source, customizer);
+	       * // => true
+	       */
 
-	    case '294':
-	      capture = parse294(capture);
-	      break;
 
-	    case '370':
-	      capture = parse370(capture);
-	      break;
-	  }
+	      function isMatchWith(object, source, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return baseIsMatch(object, source, getMatchData(source), customizer);
+	      }
+	      /**
+	       * Checks if `value` is `NaN`.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+	       * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+	       * `undefined` and other non-number values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+	       * @example
+	       *
+	       * _.isNaN(NaN);
+	       * // => true
+	       *
+	       * _.isNaN(new Number(NaN));
+	       * // => true
+	       *
+	       * isNaN(undefined);
+	       * // => true
+	       *
+	       * _.isNaN(undefined);
+	       * // => false
+	       */
 
-	  return capture;
 
-	  function linkErrorObject(d) {
-	    return "<a class=\"error_object_link\">".concat(d, "</a>");
-	  }
+	      function isNaN(value) {
+	        // An `NaN` primitive is the only value that is not equal to itself.
+	        // Perform the `toStringTag` check first to avoid errors with some
+	        // ActiveX objects in IE.
+	        return isNumber(value) && value != +value;
+	      }
+	      /**
+	       * Checks if `value` is a pristine native function.
+	       *
+	       * **Note:** This method can't reliably detect native functions in the presence
+	       * of the core-js package because core-js circumvents this kind of detection.
+	       * Despite multiple requests, the core-js maintainer has made it clear: any
+	       * attempt to fix the detection will be obstructed. As a result, we're left
+	       * with little choice but to throw an error. Unfortunately, this also affects
+	       * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+	       * which rely on core-js.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a native function,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.isNative(Array.prototype.push);
+	       * // => true
+	       *
+	       * _.isNative(_);
+	       * // => false
+	       */
 
-	  function linkEntity(d) {
-	    return "<a class=\"error_entity_link\">".concat(d, "</a>");
-	  }
 
-	  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...
+	      function isNative(value) {
+	        if (isMaskable(value)) {
+	          throw new Error(CORE_ERROR_TEXT);
+	        }
 
+	        return baseIsNative(value);
+	      }
+	      /**
+	       * Checks if `value` is `null`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+	       * @example
+	       *
+	       * _.isNull(null);
+	       * // => true
+	       *
+	       * _.isNull(void 0);
+	       * // => false
+	       */
 
-	  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 isNull(value) {
+	        return value === null;
+	      }
+	      /**
+	       * Checks if `value` is `null` or `undefined`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
+	       * @example
+	       *
+	       * _.isNil(null);
+	       * // => true
+	       *
+	       * _.isNil(void 0);
+	       * // => true
+	       *
+	       * _.isNil(NaN);
+	       * // => false
+	       */
 
-	  function parse231(capture) {
-	    var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-	    var items = capture.split('),');
-	    items.forEach(function (item) {
-	      var match = item.match(/\#(\d+)\((.+)\)?/);
+	      function isNil(value) {
+	        return value == null;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Number` primitive or object.
+	       *
+	       * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
+	       * classified as numbers, use the `_.isFinite` method.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a number, else `false`.
+	       * @example
+	       *
+	       * _.isNumber(3);
+	       * // => true
+	       *
+	       * _.isNumber(Number.MIN_VALUE);
+	       * // => true
+	       *
+	       * _.isNumber(Infinity);
+	       * // => true
+	       *
+	       * _.isNumber('3');
+	       * // => false
+	       */
 
-	      if (match !== null && match.length > 2) {
-	        newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
-	          layer: match[2]
-	        }));
+
+	      function isNumber(value) {
+	        return typeof value == 'number' || isObjectLike(value) && baseGetTag(value) == numberTag;
 	      }
-	    });
-	    return newList.join(', ');
-	  } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
+	      /**
+	       * Checks if `value` is a plain object, that is, an object created by the
+	       * `Object` constructor or one with a `[[Prototype]]` of `null`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.8.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       * }
+	       *
+	       * _.isPlainObject(new Foo);
+	       * // => false
+	       *
+	       * _.isPlainObject([1, 2, 3]);
+	       * // => false
+	       *
+	       * _.isPlainObject({ 'x': 0, 'y': 0 });
+	       * // => true
+	       *
+	       * _.isPlainObject(Object.create(null));
+	       * // => true
+	       */
 
 
-	  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
+	      function isPlainObject(value) {
+	        if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+	          return false;
+	        }
 
-	      var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
+	        var proto = getPrototype(value);
 
-	      var idType = item[1].slice(0, 1); // ID has # at the front
+	        if (proto === null) {
+	          return true;
+	        }
 
-	      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')"
+	        var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+	        return typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `RegExp` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+	       * @example
+	       *
+	       * _.isRegExp(/abc/);
+	       * // => true
+	       *
+	       * _.isRegExp('/abc/');
+	       * // => false
+	       */
 
 
-	  function parse370(capture) {
-	    if (!capture) return '';
-	    var match = capture.match(/\(including the name (\'.+\')\)/);
+	      var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
+	      /**
+	       * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
+	       * double precision number which isn't the result of a rounded unsafe integer.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+	       * @example
+	       *
+	       * _.isSafeInteger(3);
+	       * // => true
+	       *
+	       * _.isSafeInteger(Number.MIN_VALUE);
+	       * // => false
+	       *
+	       * _.isSafeInteger(Infinity);
+	       * // => false
+	       *
+	       * _.isSafeInteger('3');
+	       * // => false
+	       */
 
-	    if (match && match.length) {
-	      return _t('QA.keepRight.errorTypes.370.including_the_name', {
-	        name: match[1]
-	      });
-	    }
+	      function isSafeInteger(value) {
+	        return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Set` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+	       * @example
+	       *
+	       * _.isSet(new Set);
+	       * // => true
+	       *
+	       * _.isSet(new WeakSet);
+	       * // => false
+	       */
 
-	    return '';
-	  } // arbitrary node list of form: #ID,#ID,#ID...
 
+	      var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
+	      /**
+	       * Checks if `value` is classified as a `String` primitive or object.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+	       * @example
+	       *
+	       * _.isString('abc');
+	       * // => true
+	       *
+	       * _.isString(1);
+	       * // => false
+	       */
 
-	  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 isString(value) {
+	        return typeof value == 'string' || !isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag;
+	      }
+	      /**
+	       * 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
+	       */
 
-	var serviceKeepRight = {
-	  title: 'keepRight',
-	  init: function init() {
-	    _mainFileFetcher.get('keepRight').then(function (d) {
-	      return _krData = d;
-	    });
 
-	    if (!_cache) {
-	      this.reset();
-	    }
+	      function isSymbol(value) {
+	        return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	      }
+	      /**
+	       * Checks if `value` is classified as a typed array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+	       * @example
+	       *
+	       * _.isTypedArray(new Uint8Array);
+	       * // => true
+	       *
+	       * _.isTypedArray([]);
+	       * // => false
+	       */
 
-	    this.event = utilRebind(this, dispatch$1, 'on');
-	  },
-	  reset: function reset() {
-	    if (_cache) {
-	      Object.values(_cache.inflightTile).forEach(abortRequest);
-	    }
 
-	    _cache = {
-	      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 isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+	      /**
+	       * Checks if `value` is `undefined`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+	       * @example
+	       *
+	       * _.isUndefined(void 0);
+	       * // => true
+	       *
+	       * _.isUndefined(null);
+	       * // => false
+	       */
 
-	    var options = {
-	      format: 'geojson',
-	      ch: _krRuleset
-	    }; // determine the needed tiles to cover the view
+	      function isUndefined(value) {
+	        return value === undefined$1;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `WeakMap` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
+	       * @example
+	       *
+	       * _.isWeakMap(new WeakMap);
+	       * // => true
+	       *
+	       * _.isWeakMap(new Map);
+	       * // => false
+	       */
 
-	    var tiles = tiler.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    abortUnwantedRequests(_cache, tiles); // issue new requests..
+	      function isWeakMap(value) {
+	        return isObjectLike(value) && getTag(value) == weakMapTag;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `WeakSet` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
+	       * @example
+	       *
+	       * _.isWeakSet(new WeakSet);
+	       * // => true
+	       *
+	       * _.isWeakSet(new Set);
+	       * // => false
+	       */
 
-	    tiles.forEach(function (tile) {
-	      if (_cache.loadedTile[tile.id] || _cache.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];
+	      function isWeakSet(value) {
+	        return isObjectLike(value) && baseGetTag(value) == weakSetTag;
+	      }
+	      /**
+	       * Checks if `value` is less than `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is less than `other`,
+	       *  else `false`.
+	       * @see _.gt
+	       * @example
+	       *
+	       * _.lt(1, 3);
+	       * // => true
+	       *
+	       * _.lt(3, 3);
+	       * // => false
+	       *
+	       * _.lt(3, 1);
+	       * // => false
+	       */
 
-	      var params = Object.assign({}, options, {
-	        left: left,
-	        bottom: bottom,
-	        right: right,
-	        top: top
+
+	      var lt = createRelationalOperation(baseLt);
+	      /**
+	       * Checks if `value` is less than or equal to `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is less than or equal to
+	       *  `other`, else `false`.
+	       * @see _.gte
+	       * @example
+	       *
+	       * _.lte(1, 3);
+	       * // => true
+	       *
+	       * _.lte(3, 3);
+	       * // => true
+	       *
+	       * _.lte(3, 1);
+	       * // => false
+	       */
+
+	      var lte = createRelationalOperation(function (value, other) {
+	        return value <= other;
 	      });
-	      var url = "".concat(_krUrlRoot, "/export.php?") + 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;
+	      /**
+	       * Converts `value` to an array.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {Array} Returns the converted array.
+	       * @example
+	       *
+	       * _.toArray({ 'a': 1, 'b': 2 });
+	       * // => [1, 2]
+	       *
+	       * _.toArray('abc');
+	       * // => ['a', 'b', 'c']
+	       *
+	       * _.toArray(1);
+	       * // => []
+	       *
+	       * _.toArray(null);
+	       * // => []
+	       */
 
-	        if (!data || !data.features || !data.features.length) {
-	          throw new Error('No Data');
+	      function toArray(value) {
+	        if (!value) {
+	          return [];
 	        }
 
-	        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.
+	        if (isArrayLike(value)) {
+	          return isString(value) ? stringToArray(value) : copyArray(value);
+	        }
 
-	          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.
+	        if (symIterator && value[symIterator]) {
+	          return iteratorToArray(value[symIterator]());
+	        }
 
-	          switch (whichType) {
-	            case '170':
-	              description = "This feature has a FIXME tag: ".concat(description);
-	              break;
+	        var tag = getTag(value),
+	            func = tag == mapTag ? mapToArray : tag == setTag ? setToArray : values;
+	        return func(value);
+	      }
+	      /**
+	       * Converts `value` to a finite number.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.12.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted number.
+	       * @example
+	       *
+	       * _.toFinite(3.2);
+	       * // => 3.2
+	       *
+	       * _.toFinite(Number.MIN_VALUE);
+	       * // => 5e-324
+	       *
+	       * _.toFinite(Infinity);
+	       * // => 1.7976931348623157e+308
+	       *
+	       * _.toFinite('3.2');
+	       * // => 3.2
+	       */
 
-	            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~".concat(description);
-	              break;
+	      function toFinite(value) {
+	        if (!value) {
+	          return value === 0 ? value : 0;
+	        }
 
-	            case '300':
-	              description = 'This highway is missing a maxspeed tag';
-	              break;
+	        value = toNumber(value);
 
-	            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
+	        if (value === INFINITY || value === -INFINITY) {
+	          var sign = value < 0 ? -1 : 1;
+	          return sign * MAX_INTEGER;
+	        }
 
+	        return value === value ? value : 0;
+	      }
+	      /**
+	       * Converts `value` to an integer.
+	       *
+	       * **Note:** This method is loosely based on
+	       * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.toInteger(3.2);
+	       * // => 3
+	       *
+	       * _.toInteger(Number.MIN_VALUE);
+	       * // => 0
+	       *
+	       * _.toInteger(Infinity);
+	       * // => 1.7976931348623157e+308
+	       *
+	       * _.toInteger('3.2');
+	       * // => 3
+	       */
 
-	          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);
+	      function toInteger(value) {
+	        var result = toFinite(value),
+	            remainder = result % 1;
+	        return result === result ? remainder ? result - remainder : result : 0;
+	      }
+	      /**
+	       * Converts `value` to an integer suitable for use as the length of an
+	       * array-like object.
+	       *
+	       * **Note:** This method is based on
+	       * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.toLength(3.2);
+	       * // => 3
+	       *
+	       * _.toLength(Number.MIN_VALUE);
+	       * // => 0
+	       *
+	       * _.toLength(Infinity);
+	       * // => 4294967295
+	       *
+	       * _.toLength('3.2');
+	       * // => 3
+	       */
 
-	          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.data[id] = d;
 
-	          _cache.rtree.insert(encodeIssueRtree(d));
-	        });
-	        dispatch$1.call('loaded');
-	      })["catch"](function () {
-	        delete _cache.inflightTile[tile.id];
-	        _cache.loadedTile[tile.id] = true;
-	      });
-	    });
-	  },
-	  postUpdate: function postUpdate(d, callback) {
-	    var _this2 = this;
+	      function toLength(value) {
+	        return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
+	      }
+	      /**
+	       * 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
+	       */
 
-	    if (_cache.inflightPost[d.id]) {
-	      return callback({
-	        message: 'Error update already inflight',
-	        status: -2
-	      }, d);
-	    }
 
-	    var params = {
-	      schema: d.schema,
-	      id: d.id
-	    };
+	      function toNumber(value) {
+	        if (typeof value == 'number') {
+	          return value;
+	        }
 
-	    if (d.newStatus) {
-	      params.st = d.newStatus;
-	    }
+	        if (isSymbol(value)) {
+	          return NAN;
+	        }
 
-	    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.
+	        if (isObject(value)) {
+	          var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+	          value = isObject(other) ? other + '' : other;
+	        }
 
+	        if (typeof value != 'string') {
+	          return value === 0 ? value : +value;
+	        }
 
-	    var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
-	    var controller = new AbortController();
-	    _cache.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)
+	        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;
+	      }
+	      /**
+	       * Converts `value` to a plain object flattening inherited enumerable string
+	       * keyed properties of `value` to own properties of the plain object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {Object} Returns the converted plain object.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.assign({ 'a': 1 }, new Foo);
+	       * // => { 'a': 1, 'b': 2 }
+	       *
+	       * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
+	       * // => { 'a': 1, 'b': 2, 'c': 3 }
+	       */
 
-	    d3_json(url, {
-	      signal: controller.signal
-	    })["finally"](function () {
-	      delete _cache.inflightPost[d.id];
 
-	      if (d.newStatus === 'ignore') {
-	        // ignore permanently (false positive)
-	        _this2.removeItem(d);
-	      } else if (d.newStatus === 'ignore_t') {
-	        // ignore temporarily (error fixed)
-	        _this2.removeItem(d);
+	      function toPlainObject(value) {
+	        return copyObject(value, keysIn(value));
+	      }
+	      /**
+	       * Converts `value` to a safe integer. A safe integer can be compared and
+	       * represented correctly.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.toSafeInteger(3.2);
+	       * // => 3
+	       *
+	       * _.toSafeInteger(Number.MIN_VALUE);
+	       * // => 0
+	       *
+	       * _.toSafeInteger(Infinity);
+	       * // => 9007199254740991
+	       *
+	       * _.toSafeInteger('3.2');
+	       * // => 3
+	       */
 
-	        _cache.closed["".concat(d.schema, ":").concat(d.id)] = true;
-	      } else {
-	        d = _this2.replaceItem(d.update({
-	          comment: d.newComment,
-	          newComment: undefined,
-	          newState: undefined
-	        }));
+
+	      function toSafeInteger(value) {
+	        return value ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER) : value === 0 ? value : 0;
 	      }
+	      /**
+	       * Converts `value` to a string. An empty string is returned for `null`
+	       * and `undefined` values. The sign of `-0` is preserved.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {string} Returns the converted string.
+	       * @example
+	       *
+	       * _.toString(null);
+	       * // => ''
+	       *
+	       * _.toString(-0);
+	       * // => '-0'
+	       *
+	       * _.toString([1, 2, 3]);
+	       * // => '1,2,3'
+	       */
 
-	      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.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];
-	  },
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) return;
-	    _cache.data[item.id] = item;
-	    updateRtree(encodeIssueRtree(item), true); // true = replace
 
-	    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(encodeIssueRtree(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.closed).sort();
-	  }
-	};
+	      function toString(value) {
+	        return value == null ? '' : baseToString(value);
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	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: {}
-	}; // This gets reassigned if reset
+	      /**
+	       * Assigns own enumerable string keyed properties of source objects to the
+	       * destination object. Source objects are applied from left to right.
+	       * Subsequent sources overwrite property assignments of previous sources.
+	       *
+	       * **Note:** This method mutates `object` and is loosely based on
+	       * [`Object.assign`](https://mdn.io/Object/assign).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.10.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assignIn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       * }
+	       *
+	       * function Bar() {
+	       *   this.c = 3;
+	       * }
+	       *
+	       * Foo.prototype.b = 2;
+	       * Bar.prototype.d = 4;
+	       *
+	       * _.assign({ 'a': 0 }, new Foo, new Bar);
+	       * // => { 'a': 1, 'c': 3 }
+	       */
 
-	var _cache$1;
 
-	function abortRequest$1(i) {
-	  Object.values(i).forEach(function (controller) {
-	    if (controller) {
-	      controller.abort();
-	    }
-	  });
-	}
+	      var assign = createAssigner(function (object, source) {
+	        if (isPrototype(source) || isArrayLike(source)) {
+	          copyObject(source, keys(source), object);
+	          return;
+	        }
 
-	function abortUnwantedRequests$1(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) {
-	      return k === tile.id;
-	    });
+	        for (var key in source) {
+	          if (hasOwnProperty.call(source, key)) {
+	            assignValue(object, key, source[key]);
+	          }
+	        }
+	      });
+	      /**
+	       * This method is like `_.assign` except that it iterates over own and
+	       * inherited source properties.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias extend
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assign
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       * }
+	       *
+	       * function Bar() {
+	       *   this.c = 3;
+	       * }
+	       *
+	       * Foo.prototype.b = 2;
+	       * Bar.prototype.d = 4;
+	       *
+	       * _.assignIn({ 'a': 0 }, new Foo, new Bar);
+	       * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
+	       */
 
-	    if (!wanted) {
-	      abortRequest$1(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
-	  });
-	}
+	      var assignIn = createAssigner(function (object, source) {
+	        copyObject(source, keysIn(source), object);
+	      });
+	      /**
+	       * This method is like `_.assignIn` except that it accepts `customizer`
+	       * which is invoked to produce the assigned values. If `customizer` returns
+	       * `undefined`, assignment is handled by the method instead. The `customizer`
+	       * is invoked with five arguments: (objValue, srcValue, key, object, source).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias extendWith
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} sources The source objects.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assignWith
+	       * @example
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   return _.isUndefined(objValue) ? srcValue : objValue;
+	       * }
+	       *
+	       * var defaults = _.partialRight(_.assignInWith, customizer);
+	       *
+	       * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	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
+	      var assignInWith = createAssigner(function (object, source, srcIndex, customizer) {
+	        copyObject(source, keysIn(source), object, customizer);
+	      });
+	      /**
+	       * This method is like `_.assign` except that it accepts `customizer`
+	       * which is invoked to produce the assigned values. If `customizer` returns
+	       * `undefined`, assignment is handled by the method instead. The `customizer`
+	       * is invoked with five arguments: (objValue, srcValue, key, object, source).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} sources The source objects.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assignInWith
+	       * @example
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   return _.isUndefined(objValue) ? srcValue : objValue;
+	       * }
+	       *
+	       * var defaults = _.partialRight(_.assignWith, customizer);
+	       *
+	       * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
+	      var assignWith = createAssigner(function (object, source, srcIndex, customizer) {
+	        copyObject(source, keys(source), object, customizer);
+	      });
+	      /**
+	       * Creates an array of values corresponding to `paths` of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {...(string|string[])} [paths] The property paths to pick.
+	       * @returns {Array} Returns the picked values.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+	       *
+	       * _.at(object, ['a[0].b.c', 'a[1]']);
+	       * // => [3, 4]
+	       */
 
-	function updateRtree$1(item, replace) {
-	  _cache$1.rtree.remove(item, function (a, b) {
-	    return a.data.id === b.data.id;
-	  });
+	      var at = flatRest(baseAt);
+	      /**
+	       * Creates an object that inherits from the `prototype` object. If a
+	       * `properties` object is given, its own enumerable string keyed properties
+	       * are assigned to the created object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.3.0
+	       * @category Object
+	       * @param {Object} prototype The object to inherit from.
+	       * @param {Object} [properties] The properties to assign to the object.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * function Shape() {
+	       *   this.x = 0;
+	       *   this.y = 0;
+	       * }
+	       *
+	       * function Circle() {
+	       *   Shape.call(this);
+	       * }
+	       *
+	       * Circle.prototype = _.create(Shape.prototype, {
+	       *   'constructor': Circle
+	       * });
+	       *
+	       * var circle = new Circle;
+	       * circle instanceof Circle;
+	       * // => true
+	       *
+	       * circle instanceof Shape;
+	       * // => true
+	       */
 
-	  if (replace) {
-	    _cache$1.rtree.insert(item);
-	  }
-	}
+	      function create(prototype, properties) {
+	        var result = baseCreate(prototype);
+	        return properties == null ? result : baseAssign(result, properties);
+	      }
+	      /**
+	       * Assigns own and inherited enumerable string keyed properties of source
+	       * objects to the destination object for all destination properties that
+	       * resolve to `undefined`. Source objects are applied from left to right.
+	       * Once a property is set, additional values of the same property are ignored.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.defaultsDeep
+	       * @example
+	       *
+	       * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	function linkErrorObject(d) {
-	  return "<a class=\"error_object_link\">".concat(d, "</a>");
-	}
 
-	function linkEntity(d) {
-	  return "<a class=\"error_entity_link\">".concat(d, "</a>");
-	}
+	      var defaults = baseRest(function (object, sources) {
+	        object = Object(object);
+	        var index = -1;
+	        var length = sources.length;
+	        var guard = length > 2 ? sources[2] : undefined$1;
 
-	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];
-	  }
-	}
+	        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+	          length = 1;
+	        }
 
-	function relativeBearing(p1, p2) {
-	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
+	        while (++index < length) {
+	          var source = sources[index];
+	          var props = keysIn(source);
+	          var propsIndex = -1;
+	          var propsLength = props.length;
 
-	  if (angle < 0) {
-	    angle += 2 * Math.PI;
-	  } // Return degrees
+	          while (++propsIndex < propsLength) {
+	            var key = props[propsIndex];
+	            var value = object[key];
 
+	            if (value === undefined$1 || eq(value, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+	              object[key] = source[key];
+	            }
+	          }
+	        }
 
-	  return angle * 180 / Math.PI;
-	} // Assuming range [0,360)
+	        return object;
+	      });
+	      /**
+	       * This method is like `_.defaults` except that it recursively assigns
+	       * default properties.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.defaults
+	       * @example
+	       *
+	       * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
+	       * // => { 'a': { 'b': 2, 'c': 3 } }
+	       */
 
+	      var defaultsDeep = baseRest(function (args) {
+	        args.push(undefined$1, customDefaultsMerge);
+	        return apply(mergeWith, undefined$1, args);
+	      });
+	      /**
+	       * This method is like `_.find` except that it returns the key of the first
+	       * element `predicate` returns truthy for instead of the element itself.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.1.0
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {string|undefined} Returns the key of the matched element,
+	       *  else `undefined`.
+	       * @example
+	       *
+	       * var users = {
+	       *   'barney':  { 'age': 36, 'active': true },
+	       *   'fred':    { 'age': 40, 'active': false },
+	       *   'pebbles': { 'age': 1,  'active': true }
+	       * };
+	       *
+	       * _.findKey(users, function(o) { return o.age < 40; });
+	       * // => 'barney' (iteration order is not guaranteed)
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findKey(users, { 'age': 1, 'active': true });
+	       * // => 'pebbles'
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findKey(users, ['active', false]);
+	       * // => 'fred'
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findKey(users, 'active');
+	       * // => 'barney'
+	       */
 
-	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
+	      function findKey(object, predicate) {
+	        return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
+	      }
+	      /**
+	       * This method is like `_.findKey` except that it iterates over elements of
+	       * a collection in the opposite order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {string|undefined} Returns the key of the matched element,
+	       *  else `undefined`.
+	       * @example
+	       *
+	       * var users = {
+	       *   'barney':  { 'age': 36, 'active': true },
+	       *   'fred':    { 'age': 40, 'active': false },
+	       *   'pebbles': { 'age': 1,  'active': true }
+	       * };
+	       *
+	       * _.findLastKey(users, function(o) { return o.age < 40; });
+	       * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findLastKey(users, { 'age': 36, 'active': true });
+	       * // => 'barney'
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findLastKey(users, ['active', false]);
+	       * // => 'fred'
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findLastKey(users, 'active');
+	       * // => 'pebbles'
+	       */
 
 
-	function preventCoincident(loc, bumpUp) {
-	  var coincident = false;
+	      function findLastKey(object, predicate) {
+	        return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
+	      }
+	      /**
+	       * Iterates over own and inherited enumerable string keyed properties of an
+	       * object and invokes `iteratee` for each property. The iteratee is invoked
+	       * with three arguments: (value, key, object). Iteratee functions may exit
+	       * iteration early by explicitly returning `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.3.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forInRight
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forIn(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
+	       */
 
-	  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 loc;
-	}
+	      function forIn(object, iteratee) {
+	        return object == null ? object : baseFor(object, getIteratee(iteratee, 3), keysIn);
+	      }
+	      /**
+	       * This method is like `_.forIn` except that it iterates over properties of
+	       * `object` in the opposite order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forIn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forInRight(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
+	       */
 
-	var serviceImproveOSM = {
-	  title: 'improveOSM',
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data').then(function (d) {
-	      return _impOsmData = d.improveOSM;
-	    });
 
-	    if (!_cache$1) {
-	      this.reset();
-	    }
+	      function forInRight(object, iteratee) {
+	        return object == null ? object : baseForRight(object, getIteratee(iteratee, 3), keysIn);
+	      }
+	      /**
+	       * Iterates over own enumerable string keyed properties of an object and
+	       * invokes `iteratee` for each property. The iteratee is invoked with three
+	       * arguments: (value, key, object). Iteratee functions may exit iteration
+	       * early by explicitly returning `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.3.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forOwnRight
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forOwn(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+	       */
 
-	    this.event = utilRebind(this, dispatch$2, 'on');
-	  },
-	  reset: function reset() {
-	    if (_cache$1) {
-	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
-	    }
 
-	    _cache$1 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
-	  loadIssues: function loadIssues(projection) {
-	    var _this = this;
+	      function forOwn(object, iteratee) {
+	        return object && baseForOwn(object, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * This method is like `_.forOwn` except that it iterates over properties of
+	       * `object` in the opposite order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forOwn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forOwnRight(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
+	       */
 
-	    var options = {
-	      client: 'iD',
-	      status: 'OPEN',
-	      zoom: '19' // Use a high zoom so that clusters aren't returned
 
-	    }; // determine the needed tiles to cover the view
+	      function forOwnRight(object, iteratee) {
+	        return object && baseForOwnRight(object, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * Creates an array of function property names from own enumerable properties
+	       * of `object`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @returns {Array} Returns the function names.
+	       * @see _.functionsIn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = _.constant('a');
+	       *   this.b = _.constant('b');
+	       * }
+	       *
+	       * Foo.prototype.c = _.constant('c');
+	       *
+	       * _.functions(new Foo);
+	       * // => ['a', 'b']
+	       */
 
-	    var tiles = tiler$1.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    abortUnwantedRequests$1(_cache$1, tiles); // issue new requests..
+	      function functions(object) {
+	        return object == null ? [] : baseFunctions(object, keys(object));
+	      }
+	      /**
+	       * Creates an array of function property names from own and inherited
+	       * enumerable properties of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @returns {Array} Returns the function names.
+	       * @see _.functions
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = _.constant('a');
+	       *   this.b = _.constant('b');
+	       * }
+	       *
+	       * Foo.prototype.c = _.constant('c');
+	       *
+	       * _.functionsIn(new Foo);
+	       * // => ['a', 'b', 'c']
+	       */
 
-	    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];
+	      function functionsIn(object) {
+	        return object == null ? [] : baseFunctions(object, keysIn(object));
+	      }
+	      /**
+	       * Gets the value at `path` of `object`. If the resolved value is
+	       * `undefined`, the `defaultValue` is returned in its place.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the property to get.
+	       * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+	       * @returns {*} Returns the resolved value.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+	       *
+	       * _.get(object, 'a[0].b.c');
+	       * // => 3
+	       *
+	       * _.get(object, ['a', '0', 'b', 'c']);
+	       * // => 3
+	       *
+	       * _.get(object, 'a.b.c', 'default');
+	       * // => 'default'
+	       */
 
-	      var params = Object.assign({}, options, {
-	        east: east,
-	        south: south,
-	        west: west,
-	        north: north
-	      }); // 3 separate requests to store for each tile
 
-	      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];
+	      function get(object, path, defaultValue) {
+	        var result = object == null ? undefined$1 : baseGet(object, path);
+	        return result === undefined$1 ? defaultValue : result;
+	      }
+	      /**
+	       * Checks if `path` is a direct property of `object`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path to check.
+	       * @returns {boolean} Returns `true` if `path` exists, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': { 'b': 2 } };
+	       * var other = _.create({ 'a': _.create({ 'b': 2 }) });
+	       *
+	       * _.has(object, 'a');
+	       * // => true
+	       *
+	       * _.has(object, 'a.b');
+	       * // => true
+	       *
+	       * _.has(object, ['a', 'b']);
+	       * // => true
+	       *
+	       * _.has(other, 'a');
+	       * // => false
+	       */
+
+
+	      function has(object, path) {
+	        return object != null && hasPath(object, path, baseHas);
+	      }
+	      /**
+	       * Checks if `path` is a direct or inherited property of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path to check.
+	       * @returns {boolean} Returns `true` if `path` exists, else `false`.
+	       * @example
+	       *
+	       * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+	       *
+	       * _.hasIn(object, 'a');
+	       * // => true
+	       *
+	       * _.hasIn(object, 'a.b');
+	       * // => true
+	       *
+	       * _.hasIn(object, ['a', 'b']);
+	       * // => true
+	       *
+	       * _.hasIn(object, 'b');
+	       * // => false
+	       */
+
 
-	          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
+	      function hasIn(object, path) {
+	        return object != null && hasPath(object, path, baseHasIn);
+	      }
+	      /**
+	       * Creates an object composed of the inverted keys and values of `object`.
+	       * If `object` contains duplicate values, subsequent values overwrite
+	       * property assignments of previous values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.7.0
+	       * @category Object
+	       * @param {Object} object The object to invert.
+	       * @returns {Object} Returns the new inverted object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2, 'c': 1 };
+	       *
+	       * _.invert(object);
+	       * // => { '1': 'c', '2': 'b' }
+	       */
 
 
-	          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
+	      var invert = createInverter(function (result, value, key) {
+	        if (value != null && typeof value.toString != 'function') {
+	          value = nativeObjectToString.call(value);
+	        }
 
-	              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
+	        result[value] = key;
+	      }, constant(identity));
+	      /**
+	       * This method is like `_.invert` except that the inverted object is generated
+	       * from the results of running each element of `object` thru `iteratee`. The
+	       * corresponding inverted value of each inverted key is an array of keys
+	       * responsible for generating the inverted value. The iteratee is invoked
+	       * with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.1.0
+	       * @category Object
+	       * @param {Object} object The object to invert.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Object} Returns the new inverted object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2, 'c': 1 };
+	       *
+	       * _.invertBy(object);
+	       * // => { '1': ['a', 'c'], '2': ['b'] }
+	       *
+	       * _.invertBy(object, function(value) {
+	       *   return 'group' + value;
+	       * });
+	       * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
+	       */
 
+	      var invertBy = createInverter(function (result, value, key) {
+	        if (value != null && typeof value.toString != 'function') {
+	          value = nativeObjectToString.call(value);
+	        }
 
-	              loc = preventCoincident(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
+	        if (hasOwnProperty.call(result, value)) {
+	          result[value].push(key);
+	        } else {
+	          result[value] = [key];
+	        }
+	      }, getIteratee);
+	      /**
+	       * Invokes the method at `path` of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the method to invoke.
+	       * @param {...*} [args] The arguments to invoke the method with.
+	       * @returns {*} Returns the result of the invoked method.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
+	       *
+	       * _.invoke(object, 'a[0].b.c.slice', 1, 3);
+	       * // => [2, 3]
+	       */
 
-	              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;
+	      var invoke = baseRest(baseInvoke);
+	      /**
+	       * Creates an array of the own enumerable property names of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects. See the
+	       * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+	       * for more details.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.keys(new Foo);
+	       * // => ['a', 'b'] (iteration order is not guaranteed)
+	       *
+	       * _.keys('hi');
+	       * // => ['0', '1']
+	       */
 
-	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	            });
-	          } // Tiles at high zoom == missing roads
+	      function keys(object) {
+	        return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
+	      }
+	      /**
+	       * Creates an array of the own and inherited enumerable property names of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.keysIn(new Foo);
+	       * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+	       */
 
 
-	          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
+	      function keysIn(object) {
+	        return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
+	      }
+	      /**
+	       * The opposite of `_.mapValues`; this method creates an object with the
+	       * same values as `object` and keys generated by running each own enumerable
+	       * string keyed property of `object` thru `iteratee`. The iteratee is invoked
+	       * with three arguments: (value, key, object).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.8.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns the new mapped object.
+	       * @see _.mapValues
+	       * @example
+	       *
+	       * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
+	       *   return key + value;
+	       * });
+	       * // => { 'a1': 1, 'b2': 2 }
+	       */
 
-	              var loc = pointAverage(feature.points);
-	              loc = preventCoincident(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
 
-	              if (numberOfTrips === -1) {
-	                d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-	              }
+	      function mapKeys(object, iteratee) {
+	        var result = {};
+	        iteratee = getIteratee(iteratee, 3);
+	        baseForOwn(object, function (value, key, object) {
+	          baseAssignValue(result, iteratee(value, key, object), value);
+	        });
+	        return result;
+	      }
+	      /**
+	       * Creates an object with the same keys as `object` and values generated
+	       * by running each own enumerable string keyed property of `object` thru
+	       * `iteratee`. The iteratee is invoked with three arguments:
+	       * (value, key, object).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns the new mapped object.
+	       * @see _.mapKeys
+	       * @example
+	       *
+	       * var users = {
+	       *   'fred':    { 'user': 'fred',    'age': 40 },
+	       *   'pebbles': { 'user': 'pebbles', 'age': 1 }
+	       * };
+	       *
+	       * _.mapValues(users, function(o) { return o.age; });
+	       * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.mapValues(users, 'age');
+	       * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+	       */
 
-	              _cache$1.data[d.id] = d;
 
-	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	            });
-	          } // Entities at high zoom == turn restrictions
+	      function mapValues(object, iteratee) {
+	        var result = {};
+	        iteratee = getIteratee(iteratee, 3);
+	        baseForOwn(object, function (value, key, object) {
+	          baseAssignValue(result, key, iteratee(value, key, object));
+	        });
+	        return result;
+	      }
+	      /**
+	       * This method is like `_.assign` except that it recursively merges own and
+	       * inherited enumerable string keyed properties of source objects into the
+	       * destination object. Source properties that resolve to `undefined` are
+	       * skipped if a destination value exists. Array and plain object properties
+	       * are merged recursively. Other objects and value types are overridden by
+	       * assignment. Source objects are applied from left to right. Subsequent
+	       * sources overwrite property assignments of previous sources.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.5.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = {
+	       *   'a': [{ 'b': 2 }, { 'd': 4 }]
+	       * };
+	       *
+	       * var other = {
+	       *   'a': [{ 'c': 3 }, { 'e': 5 }]
+	       * };
+	       *
+	       * _.merge(object, other);
+	       * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
+	       */
 
 
-	          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 merge = createAssigner(function (object, source, srcIndex) {
+	        baseMerge(object, source, srcIndex);
+	      });
+	      /**
+	       * This method is like `_.merge` except that it accepts `customizer` which
+	       * is invoked to produce the merged values of the destination and source
+	       * properties. If `customizer` returns `undefined`, merging is handled by the
+	       * method instead. The `customizer` is invoked with six arguments:
+	       * (objValue, srcValue, key, object, source, stack).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} sources The source objects.
+	       * @param {Function} customizer The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   if (_.isArray(objValue)) {
+	       *     return objValue.concat(srcValue);
+	       *   }
+	       * }
+	       *
+	       * var object = { 'a': [1], 'b': [2] };
+	       * var other = { 'a': [3], 'b': [4] };
+	       *
+	       * _.mergeWith(object, other, customizer);
+	       * // => { 'a': [1, 3], 'b': [2, 4] }
+	       */
 
-	              var loc = preventCoincident([point.lon, point.lat], true); // Elements are presented in a strange way
+	      var mergeWith = createAssigner(function (object, source, srcIndex, customizer) {
+	        baseMerge(object, source, srcIndex, customizer);
+	      });
+	      /**
+	       * The opposite of `_.pick`; this method creates an object composed of the
+	       * own and inherited enumerable property paths of `object` that are not omitted.
+	       *
+	       * **Note:** This method is considerably slower than `_.pick`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {...(string|string[])} [paths] The property paths to omit.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.omit(object, ['a', 'c']);
+	       * // => { 'b': '2' }
+	       */
 
-	              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 omit = flatRest(function (object, paths) {
+	        var result = {};
 
-	              var _segments$0$points = _slicedToArray(segments[0].points, 2),
-	                  p1 = _segments$0$points[0],
-	                  p2 = _segments$0$points[1];
+	        if (object == null) {
+	          return result;
+	        }
 
-	              var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+	        var isDeep = false;
+	        paths = arrayMap(paths, function (path) {
+	          path = castPath(path, object);
+	          isDeep || (isDeep = path.length > 1);
+	          return path;
+	        });
+	        copyObject(object, getAllKeysIn(object), result);
 
-	              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;
+	        if (isDeep) {
+	          result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
+	        }
 
-	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	        var length = paths.length;
 
-	              dispatch$2.call('loaded');
-	            });
-	          }
-	        })["catch"](function () {
-	          delete _cache$1.inflightTile[tile.id][k];
+	        while (length--) {
+	          baseUnset(result, paths[length]);
+	        }
 
-	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	            delete _cache$1.inflightTile[tile.id];
-	            _cache$1.loadedTile[tile.id] = true;
-	          }
-	        });
+	        return result;
 	      });
-	      _cache$1.inflightTile[tile.id] = requests;
-	    });
-	  },
-	  getComments: function getComments(item) {
-	    var _this2 = this;
+	      /**
+	       * The opposite of `_.pickBy`; this method creates an object composed of
+	       * the own and inherited enumerable string keyed properties of `object` that
+	       * `predicate` doesn't return truthy for. The predicate is invoked with two
+	       * arguments: (value, key).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {Function} [predicate=_.identity] The function invoked per property.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.omitBy(object, _.isNumber);
+	       * // => { 'b': '2' }
+	       */
 
-	    // If comments already retrieved no need to do so again
-	    if (item.comments) {
-	      return Promise.resolve(item);
-	    }
+	      function omitBy(object, predicate) {
+	        return pickBy(object, negate(getIteratee(predicate)));
+	      }
+	      /**
+	       * Creates an object composed of the picked `object` properties.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {...(string|string[])} [paths] The property paths to pick.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.pick(object, ['a', 'c']);
+	       * // => { 'a': 1, 'c': 3 }
+	       */
 
-	    var key = item.issueKey;
-	    var qParams = {};
 
-	    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;
-	    }
+	      var pick = flatRest(function (object, paths) {
+	        return object == null ? {} : basePick(object, paths);
+	      });
+	      /**
+	       * Creates an object composed of the `object` properties `predicate` returns
+	       * truthy for. The predicate is invoked with two arguments: (value, key).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {Function} [predicate=_.identity] The function invoked per property.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.pickBy(object, _.isNumber);
+	       * // => { 'a': 1, 'c': 3 }
+	       */
 
-	    var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
+	      function pickBy(object, predicate) {
+	        if (object == null) {
+	          return {};
+	        }
 
-	    var cacheComments = function cacheComments(data) {
-	      // Assign directly for immediate use afterwards
-	      // comments are served newest to oldest
-	      item.comments = data.comments ? data.comments.reverse() : [];
+	        var props = arrayMap(getAllKeysIn(object), function (prop) {
+	          return [prop];
+	        });
+	        predicate = getIteratee(predicate);
+	        return basePickBy(object, props, function (value, path) {
+	          return predicate(value, path[0]);
+	        });
+	      }
+	      /**
+	       * This method is like `_.get` except that if the resolved value is a
+	       * function it's invoked with the `this` binding of its parent object and
+	       * its result is returned.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the property to resolve.
+	       * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+	       * @returns {*} Returns the resolved value.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
+	       *
+	       * _.result(object, 'a[0].b.c1');
+	       * // => 3
+	       *
+	       * _.result(object, 'a[0].b.c2');
+	       * // => 4
+	       *
+	       * _.result(object, 'a[0].b.c3', 'default');
+	       * // => 'default'
+	       *
+	       * _.result(object, 'a[0].b.c3', _.constant('default'));
+	       * // => 'default'
+	       */
 
-	      _this2.replaceItem(item);
-	    };
 
-	    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);
-	    }
+	      function result(object, path, defaultValue) {
+	        path = castPath(path, object);
+	        var index = -1,
+	            length = path.length; // Ensure the loop is entered when path is empty.
 
-	    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
+	        if (!length) {
+	          length = 1;
+	          object = undefined$1;
+	        }
 
+	        while (++index < length) {
+	          var value = object == null ? undefined$1 : object[toKey(path[index])];
 
-	    serviceOsm.userDetails(sendPayload.bind(this));
+	          if (value === undefined$1) {
+	            index = length;
+	            value = defaultValue;
+	          }
 
-	    function sendPayload(err, user) {
-	      var _this3 = this;
+	          object = isFunction(value) ? value.call(object) : value;
+	        }
 
-	      if (err) {
-	        return callback(err, d);
+	        return object;
 	      }
+	      /**
+	       * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
+	       * it's created. Arrays are created for missing index properties while objects
+	       * are created for all other missing properties. Use `_.setWith` to customize
+	       * `path` creation.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+	       *
+	       * _.set(object, 'a[0].b.c', 4);
+	       * console.log(object.a[0].b.c);
+	       * // => 4
+	       *
+	       * _.set(object, ['x', '0', 'y', 'z'], 5);
+	       * console.log(object.x[0].y.z);
+	       * // => 5
+	       */
 
-	      var key = d.issueKey;
-	      var url = "".concat(_impOsmUrls[key], "/comment");
-	      var payload = {
-	        username: user.display_name,
-	        targetIds: [d.identifier]
-	      };
 
-	      if (d.newStatus) {
-	        payload.status = d.newStatus;
-	        payload.text = 'status changed';
-	      } // Comment take place of default text
+	      function set(object, path, value) {
+	        return object == null ? object : baseSet(object, path, value);
+	      }
+	      /**
+	       * This method is like `_.set` except that it accepts `customizer` which is
+	       * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+	       * path creation is handled by the method instead. The `customizer` is invoked
+	       * with three arguments: (nsValue, key, nsObject).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {*} value The value to set.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = {};
+	       *
+	       * _.setWith(object, '[0][1]', 'a', Object);
+	       * // => { '0': { '1': 'a' } }
+	       */
 
 
-	      if (d.newComment) {
-	        payload.text = d.newComment;
+	      function setWith(object, path, value, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return object == null ? object : baseSet(object, path, value, customizer);
 	      }
+	      /**
+	       * Creates an array of own enumerable string keyed-value pairs for `object`
+	       * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
+	       * entries are returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias entries
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the key-value pairs.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.toPairs(new Foo);
+	       * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+	       */
 
-	      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
-	          });
+	      var toPairs = createToPairs(keys);
+	      /**
+	       * Creates an array of own and inherited enumerable string keyed-value pairs
+	       * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
+	       * or set, its entries are returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias entriesIn
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the key-value pairs.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.toPairsIn(new Foo);
+	       * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
+	       */
 
-	          _this3.replaceItem(d.update({
-	            comments: comments,
-	            newComment: undefined
-	          }));
-	        } else {
-	          _this3.removeItem(d);
+	      var toPairsIn = createToPairs(keysIn);
+	      /**
+	       * An alternative to `_.reduce`; this method transforms `object` to a new
+	       * `accumulator` object which is the result of running each of its own
+	       * enumerable string keyed properties thru `iteratee`, with each invocation
+	       * potentially mutating the `accumulator` object. If `accumulator` is not
+	       * provided, a new object with the same `[[Prototype]]` will be used. The
+	       * iteratee is invoked with four arguments: (accumulator, value, key, object).
+	       * Iteratee functions may exit iteration early by explicitly returning `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.3.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {*} [accumulator] The custom accumulator value.
+	       * @returns {*} Returns the accumulated value.
+	       * @example
+	       *
+	       * _.transform([2, 3, 4], function(result, n) {
+	       *   result.push(n *= n);
+	       *   return n % 2 == 0;
+	       * }, []);
+	       * // => [4, 9]
+	       *
+	       * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+	       *   (result[value] || (result[value] = [])).push(key);
+	       * }, {});
+	       * // => { '1': ['a', 'c'], '2': ['b'] }
+	       */
 
-	          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;
-	            }
+	      function transform(object, iteratee, accumulator) {
+	        var isArr = isArray(object),
+	            isArrLike = isArr || isBuffer(object) || isTypedArray(object);
+	        iteratee = getIteratee(iteratee, 4);
 
-	            _cache$1.closed[d.issueKey] += 1;
+	        if (accumulator == null) {
+	          var Ctor = object && object.constructor;
+
+	          if (isArrLike) {
+	            accumulator = isArr ? new Ctor() : [];
+	          } else if (isObject(object)) {
+	            accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+	          } else {
+	            accumulator = {};
 	          }
 	        }
 
-	        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
-	  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$1(encodeIssueRtree$1(issue), true); // true = replace
-
-	    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$1(encodeIssueRtree$1(issue), false); // false = remove
-	  },
-	  // Used to populate `closed:improveosm:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$1.closed;
-	  }
-	};
+	        (isArrLike ? arrayEach : baseForOwn)(object, function (value, index, object) {
+	          return iteratee(accumulator, value, index, object);
+	        });
+	        return accumulator;
+	      }
+	      /**
+	       * Removes the property at `path` of `object`.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to unset.
+	       * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 7 } }] };
+	       * _.unset(object, 'a[0].b.c');
+	       * // => true
+	       *
+	       * console.log(object);
+	       * // => { 'a': [{ 'b': {} }] };
+	       *
+	       * _.unset(object, ['a', '0', 'b', 'c']);
+	       * // => true
+	       *
+	       * console.log(object);
+	       * // => { 'a': [{ 'b': {} }] };
+	       */
 
-	var quot = /"/g;
 
-	// B.2.3.2.1 CreateHTML(string, tag, attribute, value)
-	// https://tc39.github.io/ecma262/#sec-createhtml
-	var createHtml = function (string, tag, attribute, value) {
-	  var S = String(requireObjectCoercible(string));
-	  var p1 = '<' + tag;
-	  if (attribute !== '') p1 += ' ' + attribute + '="' + String(value).replace(quot, '&quot;') + '"';
-	  return p1 + '>' + S + '</' + tag + '>';
-	};
+	      function unset(object, path) {
+	        return object == null ? true : baseUnset(object, path);
+	      }
+	      /**
+	       * This method is like `_.set` except that accepts `updater` to produce the
+	       * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
+	       * is invoked with one argument: (value).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.6.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {Function} updater The function to produce the updated value.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+	       *
+	       * _.update(object, 'a[0].b.c', function(n) { return n * n; });
+	       * console.log(object.a[0].b.c);
+	       * // => 9
+	       *
+	       * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
+	       * console.log(object.x[0].y.z);
+	       * // => 0
+	       */
 
-	// check the existence of a method, lowercase
-	// of a tag and escaping quotes in arguments
-	var stringHtmlForced = function (METHOD_NAME) {
-	  return fails(function () {
-	    var test = ''[METHOD_NAME]('"');
-	    return test !== test.toLowerCase() || test.split('"').length > 3;
-	  });
-	};
 
-	// `String.prototype.link` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype.link
-	_export({ target: 'String', proto: true, forced: stringHtmlForced('link') }, {
-	  link: function link(url) {
-	    return createHtml(this, 'a', 'href', url);
-	  }
-	});
+	      function update(object, path, updater) {
+	        return object == null ? object : baseUpdate(object, path, castFunction(updater));
+	      }
+	      /**
+	       * This method is like `_.update` except that it accepts `customizer` which is
+	       * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+	       * path creation is handled by the method instead. The `customizer` is invoked
+	       * with three arguments: (nsValue, key, nsObject).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.6.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {Function} updater The function to produce the updated value.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = {};
+	       *
+	       * _.updateWith(object, '[0][1]', _.constant('a'), Object);
+	       * // => { '0': { '1': 'a' } }
+	       */
 
-	var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
 
+	      function updateWith(object, path, updater, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
+	      }
+	      /**
+	       * Creates an array of the own enumerable string keyed property values of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property values.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.values(new Foo);
+	       * // => [1, 2] (iteration order is not guaranteed)
+	       *
+	       * _.values('hi');
+	       * // => ['h', 'i']
+	       */
 
 
+	      function values(object) {
+	        return object == null ? [] : baseValues(object, keys(object));
+	      }
+	      /**
+	       * Creates an array of the own and inherited enumerable string keyed property
+	       * values of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property values.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.valuesIn(new Foo);
+	       * // => [1, 2, 3] (iteration order is not guaranteed)
+	       */
 
 
+	      function valuesIn(object) {
+	        return object == null ? [] : baseValues(object, keysIn(object));
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	var nativeEndsWith = ''.endsWith;
-	var min$8 = Math.min;
+	      /**
+	       * Clamps `number` within the inclusive `lower` and `upper` bounds.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Number
+	       * @param {number} number The number to clamp.
+	       * @param {number} [lower] The lower bound.
+	       * @param {number} upper The upper bound.
+	       * @returns {number} Returns the clamped number.
+	       * @example
+	       *
+	       * _.clamp(-10, -5, 5);
+	       * // => -5
+	       *
+	       * _.clamp(10, -5, 5);
+	       * // => 5
+	       */
 
-	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$4(String.prototype, 'endsWith');
-	  return descriptor && !descriptor.writable;
-	}();
 
-	// `String.prototype.endsWith` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype.endswith
-	_export({ 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$8(toLength(endPosition), len);
-	    var search = String(searchString);
-	    return nativeEndsWith
-	      ? nativeEndsWith.call(that, search, end)
-	      : that.slice(end - search.length, end) === search;
-	  }
-	});
+	      function clamp(number, lower, upper) {
+	        if (upper === undefined$1) {
+	          upper = lower;
+	          lower = undefined$1;
+	        }
 
-	var getOwnPropertyDescriptor$5 = objectGetOwnPropertyDescriptor.f;
+	        if (upper !== undefined$1) {
+	          upper = toNumber(upper);
+	          upper = upper === upper ? upper : 0;
+	        }
 
+	        if (lower !== undefined$1) {
+	          lower = toNumber(lower);
+	          lower = lower === lower ? lower : 0;
+	        }
 
+	        return baseClamp(toNumber(number), lower, upper);
+	      }
+	      /**
+	       * Checks if `n` is between `start` and up to, but not including, `end`. If
+	       * `end` is not specified, it's set to `start` with `start` then set to `0`.
+	       * If `start` is greater than `end` the params are swapped to support
+	       * negative ranges.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.3.0
+	       * @category Number
+	       * @param {number} number The number to check.
+	       * @param {number} [start=0] The start of the range.
+	       * @param {number} end The end of the range.
+	       * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+	       * @see _.range, _.rangeRight
+	       * @example
+	       *
+	       * _.inRange(3, 2, 4);
+	       * // => true
+	       *
+	       * _.inRange(4, 8);
+	       * // => true
+	       *
+	       * _.inRange(4, 2);
+	       * // => false
+	       *
+	       * _.inRange(2, 2);
+	       * // => false
+	       *
+	       * _.inRange(1.2, 2);
+	       * // => true
+	       *
+	       * _.inRange(5.2, 4);
+	       * // => false
+	       *
+	       * _.inRange(-3, -2, -6);
+	       * // => true
+	       */
 
 
+	      function inRange(number, start, end) {
+	        start = toFinite(start);
 
+	        if (end === undefined$1) {
+	          end = start;
+	          start = 0;
+	        } else {
+	          end = toFinite(end);
+	        }
 
-	var nativeStartsWith = ''.startsWith;
-	var min$9 = Math.min;
+	        number = toNumber(number);
+	        return baseInRange(number, start, end);
+	      }
+	      /**
+	       * Produces a random number between the inclusive `lower` and `upper` bounds.
+	       * If only one argument is provided a number between `0` and the given number
+	       * is returned. If `floating` is `true`, or either `lower` or `upper` are
+	       * floats, a floating-point number is returned instead of an integer.
+	       *
+	       * **Note:** JavaScript follows the IEEE-754 standard for resolving
+	       * floating-point values which can produce unexpected results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.7.0
+	       * @category Number
+	       * @param {number} [lower=0] The lower bound.
+	       * @param {number} [upper=1] The upper bound.
+	       * @param {boolean} [floating] Specify returning a floating-point number.
+	       * @returns {number} Returns the random number.
+	       * @example
+	       *
+	       * _.random(0, 5);
+	       * // => an integer between 0 and 5
+	       *
+	       * _.random(5);
+	       * // => also an integer between 0 and 5
+	       *
+	       * _.random(5, true);
+	       * // => a floating-point number between 0 and 5
+	       *
+	       * _.random(1.2, 5.2);
+	       * // => a floating-point number between 1.2 and 5.2
+	       */
 
-	var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegexpLogic('startsWith');
-	// https://github.com/zloirock/core-js/pull/702
-	var MDN_POLYFILL_BUG$1 =  !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
-	  var descriptor = getOwnPropertyDescriptor$5(String.prototype, 'startsWith');
-	  return descriptor && !descriptor.writable;
-	}();
 
-	// `String.prototype.startsWith` method
-	// https://tc39.github.io/ecma262/#sec-string.prototype.startswith
-	_export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
-	  startsWith: function startsWith(searchString /* , position = 0 */) {
-	    var that = String(requireObjectCoercible(this));
-	    notARegexp(searchString);
-	    var index = toLength(min$9(arguments.length > 1 ? arguments[1] : undefined, that.length));
-	    var search = String(searchString);
-	    return nativeStartsWith
-	      ? nativeStartsWith.call(that, search, index)
-	      : that.slice(index, index + search.length) === search;
-	  }
-	});
+	      function random(lower, upper, floating) {
+	        if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
+	          upper = floating = undefined$1;
+	        }
 
-	var $trimEnd = stringTrim.end;
+	        if (floating === undefined$1) {
+	          if (typeof upper == 'boolean') {
+	            floating = upper;
+	            upper = undefined$1;
+	          } else if (typeof lower == 'boolean') {
+	            floating = lower;
+	            lower = undefined$1;
+	          }
+	        }
 
+	        if (lower === undefined$1 && upper === undefined$1) {
+	          lower = 0;
+	          upper = 1;
+	        } else {
+	          lower = toFinite(lower);
 
-	var FORCED$e = stringTrimForced('trimEnd');
+	          if (upper === undefined$1) {
+	            upper = lower;
+	            lower = 0;
+	          } else {
+	            upper = toFinite(upper);
+	          }
+	        }
 
-	var trimEnd = FORCED$e ? function trimEnd() {
-	  return $trimEnd(this);
-	} : ''.trimEnd;
+	        if (lower > upper) {
+	          var temp = lower;
+	          lower = upper;
+	          upper = temp;
+	        }
 
-	// `String.prototype.{ trimEnd, trimRight }` methods
-	// https://github.com/tc39/ecmascript-string-left-right-trim
-	_export({ target: 'String', proto: true, forced: FORCED$e }, {
-	  trimEnd: trimEnd,
-	  trimRight: trimEnd
-	});
+	        if (floating || lower % 1 || upper % 1) {
+	          var rand = nativeRandom();
+	          return nativeMin(lower + rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1))), upper);
+	        }
 
-	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,
-	      walkTokens: null,
-	      xhtml: false
-	    };
-	  }
+	        return baseRandom(lower, upper);
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	  function changeDefaults(newDefaults) {
-	    module.exports.defaults = newDefaults;
-	  }
+	      /**
+	       * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the camel cased string.
+	       * @example
+	       *
+	       * _.camelCase('Foo Bar');
+	       * // => 'fooBar'
+	       *
+	       * _.camelCase('--foo-bar--');
+	       * // => 'fooBar'
+	       *
+	       * _.camelCase('__FOO_BAR__');
+	       * // => 'fooBar'
+	       */
 
-	  module.exports = {
-	    defaults: getDefaults(),
-	    getDefaults: getDefaults,
-	    changeDefaults: changeDefaults
-	  };
-	});
 
-	/**
-	 * Helpers
-	 */
-	var escapeTest = /[&<>"']/;
-	var escapeReplace = /[&<>"']/g;
-	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-	var escapeReplacements = {
-	  '&': '&amp;',
-	  '<': '&lt;',
-	  '>': '&gt;',
-	  '"': '&quot;',
-	  "'": '&#39;'
-	};
+	      var camelCase = createCompounder(function (result, word, index) {
+	        word = word.toLowerCase();
+	        return result + (index ? capitalize(word) : word);
+	      });
+	      /**
+	       * Converts the first character of `string` to upper case and the remaining
+	       * to lower case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to capitalize.
+	       * @returns {string} Returns the capitalized string.
+	       * @example
+	       *
+	       * _.capitalize('FRED');
+	       * // => 'Fred'
+	       */
 
-	var getEscapeReplacement = function getEscapeReplacement(ch) {
-	  return escapeReplacements[ch];
-	};
+	      function capitalize(string) {
+	        return upperFirst(toString(string).toLowerCase());
+	      }
+	      /**
+	       * Deburrs `string` by converting
+	       * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
+	       * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
+	       * letters to basic Latin letters and removing
+	       * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to deburr.
+	       * @returns {string} Returns the deburred string.
+	       * @example
+	       *
+	       * _.deburr('déjà vu');
+	       * // => 'deja vu'
+	       */
 
-	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);
-	    }
-	  }
 
-	  return html;
-	}
+	      function deburr(string) {
+	        string = toString(string);
+	        return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
+	      }
+	      /**
+	       * Checks if `string` ends with the given target string.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to inspect.
+	       * @param {string} [target] The string to search for.
+	       * @param {number} [position=string.length] The position to search up to.
+	       * @returns {boolean} Returns `true` if `string` ends with `target`,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.endsWith('abc', 'c');
+	       * // => true
+	       *
+	       * _.endsWith('abc', 'b');
+	       * // => false
+	       *
+	       * _.endsWith('abc', 'b', 2);
+	       * // => true
+	       */
 
-	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 ':';
+	      function endsWith(string, target, position) {
+	        string = toString(string);
+	        target = baseToString(target);
+	        var length = string.length;
+	        position = position === undefined$1 ? length : baseClamp(toInteger(position), 0, length);
+	        var end = position;
+	        position -= target.length;
+	        return position >= 0 && string.slice(position, end) == target;
+	      }
+	      /**
+	       * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+	       * corresponding HTML entities.
+	       *
+	       * **Note:** No other characters are escaped. To escape additional
+	       * characters use a third-party library like [_he_](https://mths.be/he).
+	       *
+	       * Though the ">" character is escaped for symmetry, characters like
+	       * ">" and "/" don't need escaping in HTML and have no special meaning
+	       * unless they're part of a tag or unquoted attribute value. See
+	       * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+	       * (under "semi-related fun fact") for more details.
+	       *
+	       * When working with HTML you should always
+	       * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+	       * XSS vectors.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category String
+	       * @param {string} [string=''] The string to escape.
+	       * @returns {string} Returns the escaped string.
+	       * @example
+	       *
+	       * _.escape('fred, barney, & pebbles');
+	       * // => 'fred, barney, &amp; pebbles'
+	       */
 
-	    if (n.charAt(0) === '#') {
-	      return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
-	    }
 
-	    return '';
-	  });
-	}
+	      function escape(string) {
+	        string = toString(string);
+	        return string && reHasUnescapedHtml.test(string) ? string.replace(reUnescapedHtml, escapeHtmlChar) : string;
+	      }
+	      /**
+	       * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
+	       * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to escape.
+	       * @returns {string} Returns the escaped string.
+	       * @example
+	       *
+	       * _.escapeRegExp('[lodash](https://lodash.com/)');
+	       * // => '\[lodash\]\(https://lodash\.com/\)'
+	       */
 
-	var caret = /(^|[^\[])\^/g;
 
-	function edit(regex, opt) {
-	  regex = regex.source || regex;
-	  opt = opt || '';
-	  var obj = {
-	    replace: function replace(name, val) {
-	      val = val.source || val;
-	      val = val.replace(caret, '$1');
-	      regex = regex.replace(name, val);
-	      return obj;
-	    },
-	    getRegex: function getRegex() {
-	      return new RegExp(regex, opt);
-	    }
-	  };
-	  return obj;
-	}
+	      function escapeRegExp(string) {
+	        string = toString(string);
+	        return string && reHasRegExpChar.test(string) ? string.replace(reRegExpChar, '\\$&') : string;
+	      }
+	      /**
+	       * Converts `string` to
+	       * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the kebab cased string.
+	       * @example
+	       *
+	       * _.kebabCase('Foo Bar');
+	       * // => 'foo-bar'
+	       *
+	       * _.kebabCase('fooBar');
+	       * // => 'foo-bar'
+	       *
+	       * _.kebabCase('__FOO_BAR__');
+	       * // => 'foo-bar'
+	       */
 
-	var nonWordAndColonTest = /[^\w:]/g;
-	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-	function cleanUrl(sanitize, base, href) {
-	  if (sanitize) {
-	    var prot;
+	      var kebabCase = createCompounder(function (result, word, index) {
+	        return result + (index ? '-' : '') + word.toLowerCase();
+	      });
+	      /**
+	       * Converts `string`, as space separated words, to lower case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the lower cased string.
+	       * @example
+	       *
+	       * _.lowerCase('--Foo-Bar--');
+	       * // => 'foo bar'
+	       *
+	       * _.lowerCase('fooBar');
+	       * // => 'foo bar'
+	       *
+	       * _.lowerCase('__FOO_BAR__');
+	       * // => 'foo bar'
+	       */
 
-	    try {
-	      prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();
-	    } catch (e) {
-	      return null;
-	    }
+	      var lowerCase = createCompounder(function (result, word, index) {
+	        return result + (index ? ' ' : '') + word.toLowerCase();
+	      });
+	      /**
+	       * Converts the first character of `string` to lower case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the converted string.
+	       * @example
+	       *
+	       * _.lowerFirst('Fred');
+	       * // => 'fred'
+	       *
+	       * _.lowerFirst('FRED');
+	       * // => 'fRED'
+	       */
 
-	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-	      return null;
-	    }
-	  }
+	      var lowerFirst = createCaseFirst('toLowerCase');
+	      /**
+	       * Pads `string` on the left and right sides if it's shorter than `length`.
+	       * Padding characters are truncated if they can't be evenly divided by `length`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to pad.
+	       * @param {number} [length=0] The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padded string.
+	       * @example
+	       *
+	       * _.pad('abc', 8);
+	       * // => '  abc   '
+	       *
+	       * _.pad('abc', 8, '_-');
+	       * // => '_-abc_-_'
+	       *
+	       * _.pad('abc', 3);
+	       * // => 'abc'
+	       */
 
-	  if (base && !originIndependentUrl.test(href)) {
-	    href = resolveUrl(base, href);
-	  }
+	      function pad(string, length, chars) {
+	        string = toString(string);
+	        length = toInteger(length);
+	        var strLength = length ? stringSize(string) : 0;
 
-	  try {
-	    href = encodeURI(href).replace(/%25/g, '%');
-	  } catch (e) {
-	    return null;
-	  }
+	        if (!length || strLength >= length) {
+	          return string;
+	        }
 
-	  return href;
-	}
+	        var mid = (length - strLength) / 2;
+	        return createPadding(nativeFloor(mid), chars) + string + createPadding(nativeCeil(mid), chars);
+	      }
+	      /**
+	       * Pads `string` on the right side if it's shorter than `length`. Padding
+	       * characters are truncated if they exceed `length`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to pad.
+	       * @param {number} [length=0] The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padded string.
+	       * @example
+	       *
+	       * _.padEnd('abc', 6);
+	       * // => 'abc   '
+	       *
+	       * _.padEnd('abc', 6, '_-');
+	       * // => 'abc_-_'
+	       *
+	       * _.padEnd('abc', 3);
+	       * // => 'abc'
+	       */
 
-	var baseUrls = {};
-	var justDomain = /^[^:]+:\/*[^/]*$/;
-	var protocol = /^([^:]+:)[\s\S]*$/;
-	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-	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$1(base, '/', true);
-	    }
-	  }
+	      function padEnd(string, length, chars) {
+	        string = toString(string);
+	        length = toInteger(length);
+	        var strLength = length ? stringSize(string) : 0;
+	        return length && strLength < length ? string + createPadding(length - strLength, chars) : string;
+	      }
+	      /**
+	       * Pads `string` on the left side if it's shorter than `length`. Padding
+	       * characters are truncated if they exceed `length`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to pad.
+	       * @param {number} [length=0] The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padded string.
+	       * @example
+	       *
+	       * _.padStart('abc', 6);
+	       * // => '   abc'
+	       *
+	       * _.padStart('abc', 6, '_-');
+	       * // => '_-_abc'
+	       *
+	       * _.padStart('abc', 3);
+	       * // => 'abc'
+	       */
 
-	  base = baseUrls[' ' + base];
-	  var relativeBase = base.indexOf(':') === -1;
 
-	  if (href.substring(0, 2) === '//') {
-	    if (relativeBase) {
-	      return href;
-	    }
+	      function padStart(string, length, chars) {
+	        string = toString(string);
+	        length = toInteger(length);
+	        var strLength = length ? stringSize(string) : 0;
+	        return length && strLength < length ? createPadding(length - strLength, chars) + string : string;
+	      }
+	      /**
+	       * Converts `string` to an integer of the specified radix. If `radix` is
+	       * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
+	       * hexadecimal, in which case a `radix` of `16` is used.
+	       *
+	       * **Note:** This method aligns with the
+	       * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.1.0
+	       * @category String
+	       * @param {string} string The string to convert.
+	       * @param {number} [radix=10] The radix to interpret `value` by.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.parseInt('08');
+	       * // => 8
+	       *
+	       * _.map(['6', '08', '10'], _.parseInt);
+	       * // => [6, 8, 10]
+	       */
 
-	    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;
-	  }
-	}
+	      function parseInt(string, radix, guard) {
+	        if (guard || radix == null) {
+	          radix = 0;
+	        } else if (radix) {
+	          radix = +radix;
+	        }
 
-	var noopTest = {
-	  exec: function noopTest() {}
-	};
+	        return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
+	      }
+	      /**
+	       * Repeats the given string `n` times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to repeat.
+	       * @param {number} [n=1] The number of times to repeat the string.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the repeated string.
+	       * @example
+	       *
+	       * _.repeat('*', 3);
+	       * // => '***'
+	       *
+	       * _.repeat('abc', 2);
+	       * // => 'abcabc'
+	       *
+	       * _.repeat('abc', 0);
+	       * // => ''
+	       */
 
-	function merge$1(obj) {
-	  var i = 1,
-	      target,
-	      key;
 
-	  for (; i < arguments.length; i++) {
-	    target = arguments[i];
+	      function repeat(string, n, guard) {
+	        if (guard ? isIterateeCall(string, n, guard) : n === undefined$1) {
+	          n = 1;
+	        } else {
+	          n = toInteger(n);
+	        }
 
-	    for (key in target) {
-	      if (Object.prototype.hasOwnProperty.call(target, key)) {
-	        obj[key] = target[key];
+	        return baseRepeat(toString(string), n);
 	      }
-	    }
-	  }
-
-	  return obj;
-	}
+	      /**
+	       * Replaces matches for `pattern` in `string` with `replacement`.
+	       *
+	       * **Note:** This method is based on
+	       * [`String#replace`](https://mdn.io/String/replace).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to modify.
+	       * @param {RegExp|string} pattern The pattern to replace.
+	       * @param {Function|string} replacement The match replacement.
+	       * @returns {string} Returns the modified string.
+	       * @example
+	       *
+	       * _.replace('Hi Fred', 'Fred', 'Barney');
+	       * // => 'Hi Barney'
+	       */
 
-	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;
-	    }
+	      function replace() {
+	        var args = arguments,
+	            string = toString(args[0]);
+	        return args.length < 3 ? string : string.replace(args[1], args[2]);
+	      }
+	      /**
+	       * Converts `string` to
+	       * [snake case](https://en.wikipedia.org/wiki/Snake_case).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the snake cased string.
+	       * @example
+	       *
+	       * _.snakeCase('Foo Bar');
+	       * // => 'foo_bar'
+	       *
+	       * _.snakeCase('fooBar');
+	       * // => 'foo_bar'
+	       *
+	       * _.snakeCase('--FOO-BAR--');
+	       * // => 'foo_bar'
+	       */
 
-	    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;
 
-	  if (cells.length > count) {
-	    cells.splice(count);
-	  } else {
-	    while (cells.length < count) {
-	      cells.push('');
-	    }
-	  }
+	      var snakeCase = createCompounder(function (result, word, index) {
+	        return result + (index ? '_' : '') + word.toLowerCase();
+	      });
+	      /**
+	       * Splits `string` by `separator`.
+	       *
+	       * **Note:** This method is based on
+	       * [`String#split`](https://mdn.io/String/split).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to split.
+	       * @param {RegExp|string} separator The separator pattern to split by.
+	       * @param {number} [limit] The length to truncate results to.
+	       * @returns {Array} Returns the string segments.
+	       * @example
+	       *
+	       * _.split('a-b-c', '-', 2);
+	       * // => ['a', 'b']
+	       */
 
-	  for (; i < cells.length; i++) {
-	    // leading or trailing whitespace is ignored per the gfm spec
-	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
-	  }
+	      function split(string, separator, limit) {
+	        if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
+	          separator = limit = undefined$1;
+	        }
 
-	  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.
+	        limit = limit === undefined$1 ? MAX_ARRAY_LENGTH : limit >>> 0;
 
+	        if (!limit) {
+	          return [];
+	        }
 
-	function rtrim$1(str, c, invert) {
-	  var l = str.length;
+	        string = toString(string);
 
-	  if (l === 0) {
-	    return '';
-	  } // Length of suffix matching the invert condition.
+	        if (string && (typeof separator == 'string' || separator != null && !isRegExp(separator))) {
+	          separator = baseToString(separator);
 
+	          if (!separator && hasUnicode(string)) {
+	            return castSlice(stringToArray(string), 0, limit);
+	          }
+	        }
 
-	  var suffLen = 0; // Step left until we fail to match the invert condition.
+	        return string.split(separator, limit);
+	      }
+	      /**
+	       * Converts `string` to
+	       * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.1.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the start cased string.
+	       * @example
+	       *
+	       * _.startCase('--foo-bar--');
+	       * // => 'Foo Bar'
+	       *
+	       * _.startCase('fooBar');
+	       * // => 'Foo Bar'
+	       *
+	       * _.startCase('__FOO_BAR__');
+	       * // => 'FOO BAR'
+	       */
 
-	  while (suffLen < l) {
-	    var currChar = str.charAt(l - suffLen - 1);
 
-	    if (currChar === c && !invert) {
-	      suffLen++;
-	    } else if (currChar !== c && invert) {
-	      suffLen++;
-	    } else {
-	      break;
-	    }
-	  }
+	      var startCase = createCompounder(function (result, word, index) {
+	        return result + (index ? ' ' : '') + upperFirst(word);
+	      });
+	      /**
+	       * Checks if `string` starts with the given target string.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to inspect.
+	       * @param {string} [target] The string to search for.
+	       * @param {number} [position=0] The position to search from.
+	       * @returns {boolean} Returns `true` if `string` starts with `target`,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.startsWith('abc', 'a');
+	       * // => true
+	       *
+	       * _.startsWith('abc', 'b');
+	       * // => false
+	       *
+	       * _.startsWith('abc', 'b', 1);
+	       * // => true
+	       */
 
-	  return str.substr(0, l - suffLen);
-	}
+	      function startsWith(string, target, position) {
+	        string = toString(string);
+	        position = position == null ? 0 : baseClamp(toInteger(position), 0, string.length);
+	        target = baseToString(target);
+	        return string.slice(position, position + target.length) == target;
+	      }
+	      /**
+	       * Creates a compiled template function that can interpolate data properties
+	       * in "interpolate" delimiters, HTML-escape interpolated data properties in
+	       * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
+	       * properties may be accessed as free variables in the template. If a setting
+	       * object is given, it takes precedence over `_.templateSettings` values.
+	       *
+	       * **Note:** In the development build `_.template` utilizes
+	       * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
+	       * for easier debugging.
+	       *
+	       * For more information on precompiling templates see
+	       * [lodash's custom builds documentation](https://lodash.com/custom-builds).
+	       *
+	       * For more information on Chrome extension sandboxes see
+	       * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category String
+	       * @param {string} [string=''] The template string.
+	       * @param {Object} [options={}] The options object.
+	       * @param {RegExp} [options.escape=_.templateSettings.escape]
+	       *  The HTML "escape" delimiter.
+	       * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
+	       *  The "evaluate" delimiter.
+	       * @param {Object} [options.imports=_.templateSettings.imports]
+	       *  An object to import into the template as free variables.
+	       * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
+	       *  The "interpolate" delimiter.
+	       * @param {string} [options.sourceURL='lodash.templateSources[n]']
+	       *  The sourceURL of the compiled template.
+	       * @param {string} [options.variable='obj']
+	       *  The data object variable name.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the compiled template function.
+	       * @example
+	       *
+	       * // Use the "interpolate" delimiter to create a compiled template.
+	       * var compiled = _.template('hello <%= user %>!');
+	       * compiled({ 'user': 'fred' });
+	       * // => 'hello fred!'
+	       *
+	       * // Use the HTML "escape" delimiter to escape data property values.
+	       * var compiled = _.template('<b><%- value %></b>');
+	       * compiled({ 'value': '<script>' });
+	       * // => '<b>&lt;script&gt;</b>'
+	       *
+	       * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
+	       * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
+	       * compiled({ 'users': ['fred', 'barney'] });
+	       * // => '<li>fred</li><li>barney</li>'
+	       *
+	       * // Use the internal `print` function in "evaluate" delimiters.
+	       * var compiled = _.template('<% print("hello " + user); %>!');
+	       * compiled({ 'user': 'barney' });
+	       * // => 'hello barney!'
+	       *
+	       * // Use the ES template literal delimiter as an "interpolate" delimiter.
+	       * // Disable support by replacing the "interpolate" delimiter.
+	       * var compiled = _.template('hello ${ user }!');
+	       * compiled({ 'user': 'pebbles' });
+	       * // => 'hello pebbles!'
+	       *
+	       * // Use backslashes to treat delimiters as plain text.
+	       * var compiled = _.template('<%= "\\<%- value %\\>" %>');
+	       * compiled({ 'value': 'ignored' });
+	       * // => '<%- value %>'
+	       *
+	       * // Use the `imports` option to import `jQuery` as `jq`.
+	       * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
+	       * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
+	       * compiled({ 'users': ['fred', 'barney'] });
+	       * // => '<li>fred</li><li>barney</li>'
+	       *
+	       * // Use the `sourceURL` option to specify a custom sourceURL for the template.
+	       * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
+	       * compiled(data);
+	       * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
+	       *
+	       * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
+	       * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
+	       * compiled.source;
+	       * // => function(data) {
+	       * //   var __t, __p = '';
+	       * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
+	       * //   return __p;
+	       * // }
+	       *
+	       * // Use custom template delimiters.
+	       * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
+	       * var compiled = _.template('hello {{ user }}!');
+	       * compiled({ 'user': 'mustache' });
+	       * // => 'hello mustache!'
+	       *
+	       * // Use the `source` property to inline compiled templates for meaningful
+	       * // line numbers in error messages and stack traces.
+	       * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
+	       *   var JST = {\
+	       *     "main": ' + _.template(mainText).source + '\
+	       *   };\
+	       * ');
+	       */
 
-	function findClosingBracket(str, b) {
-	  if (str.indexOf(b[1]) === -1) {
-	    return -1;
-	  }
 
-	  var l = str.length;
-	  var level = 0,
-	      i = 0;
+	      function template(string, options, guard) {
+	        // Based on John Resig's `tmpl` implementation
+	        // (http://ejohn.org/blog/javascript-micro-templating/)
+	        // and Laura Doktorova's doT.js (https://github.com/olado/doT).
+	        var settings = lodash.templateSettings;
 
-	  for (; i < l; i++) {
-	    if (str[i] === '\\') {
-	      i++;
-	    } else if (str[i] === b[0]) {
-	      level++;
-	    } else if (str[i] === b[1]) {
-	      level--;
+	        if (guard && isIterateeCall(string, options, guard)) {
+	          options = undefined$1;
+	        }
 
-	      if (level < 0) {
-	        return i;
-	      }
-	    }
-	  }
+	        string = toString(string);
+	        options = assignInWith({}, options, settings, customDefaultsAssignIn);
+	        var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
+	            importsKeys = keys(imports),
+	            importsValues = baseValues(imports, importsKeys);
+	        var isEscaping,
+	            isEvaluating,
+	            index = 0,
+	            interpolate = options.interpolate || reNoMatch,
+	            source = "__p += '"; // Compile the regexp to match each delimiter.
 
-	  return -1;
-	}
+	        var reDelimiters = RegExp((options.escape || reNoMatch).source + '|' + interpolate.source + '|' + (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' + (options.evaluate || reNoMatch).source + '|$', 'g'); // Use a sourceURL for easier debugging.
+	        // The sourceURL gets injected into the source that's eval-ed, so be careful
+	        // to normalize all kinds of whitespace, so e.g. newlines (and unicode versions of it) can't sneak in
+	        // and escape the comment, thus injecting code that gets evaled.
 
-	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');
-	  }
-	} // copied from https://stackoverflow.com/a/5450113/806777
+	        var sourceURL = '//# sourceURL=' + (hasOwnProperty.call(options, 'sourceURL') ? (options.sourceURL + '').replace(/\s/g, ' ') : 'lodash.templateSources[' + ++templateCounter + ']') + '\n';
+	        string.replace(reDelimiters, function (match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+	          interpolateValue || (interpolateValue = esTemplateValue); // Escape characters that can't be included in string literals.
 
+	          source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar); // Replace delimiters with snippets.
 
-	function repeatString(pattern, count) {
-	  if (count < 1) {
-	    return '';
-	  }
+	          if (escapeValue) {
+	            isEscaping = true;
+	            source += "' +\n__e(" + escapeValue + ") +\n'";
+	          }
 
-	  var result = '';
+	          if (evaluateValue) {
+	            isEvaluating = true;
+	            source += "';\n" + evaluateValue + ";\n__p += '";
+	          }
 
-	  while (count > 1) {
-	    if (count & 1) {
-	      result += pattern;
-	    }
+	          if (interpolateValue) {
+	            source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+	          }
 
-	    count >>= 1;
-	    pattern += pattern;
-	  }
+	          index = offset + match.length; // The JS engine embedded in Adobe products needs `match` returned in
+	          // order to produce the correct `offset` value.
 
-	  return result + pattern;
-	}
+	          return match;
+	        });
+	        source += "';\n"; // If `variable` is not specified wrap a with-statement around the generated
+	        // code to add the data object to the top of the scope chain.
 
-	var helpers = {
-	  escape: escape$1,
-	  unescape: unescape$1,
-	  edit: edit,
-	  cleanUrl: cleanUrl,
-	  resolveUrl: resolveUrl,
-	  noopTest: noopTest,
-	  merge: merge$1,
-	  splitCells: splitCells,
-	  rtrim: rtrim$1,
-	  findClosingBracket: findClosingBracket,
-	  checkSanitizeDeprecation: checkSanitizeDeprecation,
-	  repeatString: repeatString
-	};
+	        var variable = hasOwnProperty.call(options, 'variable') && options.variable;
 
-	var defaults$1 = defaults.defaults;
-	var rtrim$2 = helpers.rtrim,
-	    splitCells$1 = helpers.splitCells,
-	    _escape = helpers.escape,
-	    findClosingBracket$1 = helpers.findClosingBracket;
+	        if (!variable) {
+	          source = 'with (obj) {\n' + source + '\n}\n';
+	        } // Throw an error if a forbidden character was found in `variable`, to prevent
+	        // potential command injection attacks.
+	        else if (reForbiddenIdentifierChars.test(variable)) {
+	          throw new Error(INVALID_TEMPL_VAR_ERROR_TEXT);
+	        } // Cleanup code by stripping empty strings.
 
-	function outputLink(cap, link, raw) {
-	  var href = link.href;
-	  var title = link.title ? _escape(link.title) : null;
-	  var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-	  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)
-	    };
-	  }
-	}
+	        source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source).replace(reEmptyStringMiddle, '$1').replace(reEmptyStringTrailing, '$1;'); // Frame code as the function body.
 
-	function indentCodeCompensation(raw, text) {
-	  var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
+	        source = 'function(' + (variable || 'obj') + ') {\n' + (variable ? '' : 'obj || (obj = {});\n') + "var __t, __p = ''" + (isEscaping ? ', __e = _.escape' : '') + (isEvaluating ? ', __j = Array.prototype.join;\n' + "function print() { __p += __j.call(arguments, '') }\n" : ';\n') + source + 'return __p\n}';
+	        var result = attempt(function () {
+	          return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined$1, importsValues);
+	        }); // Provide the compiled function's source by its `toString` method or
+	        // the `source` property as a convenience for inlining compiled templates.
 
-	  if (matchIndentToCode === null) {
-	    return text;
-	  }
+	        result.source = source;
 
-	  var indentToCode = matchIndentToCode[1];
-	  return text.split('\n').map(function (node) {
-	    var matchIndentInNode = node.match(/^\s+/);
+	        if (isError(result)) {
+	          throw result;
+	        }
 
-	    if (matchIndentInNode === null) {
-	      return node;
-	    }
+	        return result;
+	      }
+	      /**
+	       * Converts `string`, as a whole, to lower case just like
+	       * [String#toLowerCase](https://mdn.io/toLowerCase).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the lower cased string.
+	       * @example
+	       *
+	       * _.toLower('--Foo-Bar--');
+	       * // => '--foo-bar--'
+	       *
+	       * _.toLower('fooBar');
+	       * // => 'foobar'
+	       *
+	       * _.toLower('__FOO_BAR__');
+	       * // => '__foo_bar__'
+	       */
 
-	    var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
-	        indentInNode = _matchIndentInNode[0];
 
-	    if (indentInNode.length >= indentToCode.length) {
-	      return node.slice(indentToCode.length);
-	    }
+	      function toLower(value) {
+	        return toString(value).toLowerCase();
+	      }
+	      /**
+	       * Converts `string`, as a whole, to upper case just like
+	       * [String#toUpperCase](https://mdn.io/toUpperCase).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the upper cased string.
+	       * @example
+	       *
+	       * _.toUpper('--foo-bar--');
+	       * // => '--FOO-BAR--'
+	       *
+	       * _.toUpper('fooBar');
+	       * // => 'FOOBAR'
+	       *
+	       * _.toUpper('__foo_bar__');
+	       * // => '__FOO_BAR__'
+	       */
 
-	    return node;
-	  }).join('\n');
-	}
-	/**
-	 * Tokenizer
-	 */
 
+	      function toUpper(value) {
+	        return toString(value).toUpperCase();
+	      }
+	      /**
+	       * Removes leading and trailing whitespace or specified characters from `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to trim.
+	       * @param {string} [chars=whitespace] The characters to trim.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the trimmed string.
+	       * @example
+	       *
+	       * _.trim('  abc  ');
+	       * // => 'abc'
+	       *
+	       * _.trim('-_-abc-_-', '_-');
+	       * // => 'abc'
+	       *
+	       * _.map(['  foo  ', '  bar  '], _.trim);
+	       * // => ['foo', 'bar']
+	       */
 
-	var Tokenizer_1 = /*#__PURE__*/function () {
-	  function Tokenizer(options) {
-	    _classCallCheck(this, Tokenizer);
 
-	    this.options = options || defaults$1;
-	  }
+	      function trim(string, chars, guard) {
+	        string = toString(string);
 
-	  _createClass(Tokenizer, [{
-	    key: "space",
-	    value: function space(src) {
-	      var cap = this.rules.block.newline.exec(src);
+	        if (string && (guard || chars === undefined$1)) {
+	          return baseTrim(string);
+	        }
 
-	      if (cap) {
-	        if (cap[0].length > 1) {
-	          return {
-	            type: 'space',
-	            raw: cap[0]
-	          };
+	        if (!string || !(chars = baseToString(chars))) {
+	          return string;
 	        }
 
-	        return {
-	          raw: '\n'
-	        };
+	        var strSymbols = stringToArray(string),
+	            chrSymbols = stringToArray(chars),
+	            start = charsStartIndex(strSymbols, chrSymbols),
+	            end = charsEndIndex(strSymbols, chrSymbols) + 1;
+	        return castSlice(strSymbols, start, end).join('');
 	      }
-	    }
-	  }, {
-	    key: "code",
-	    value: function code(src, tokens) {
-	      var cap = this.rules.block.code.exec(src);
+	      /**
+	       * Removes trailing whitespace or specified characters from `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to trim.
+	       * @param {string} [chars=whitespace] The characters to trim.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the trimmed string.
+	       * @example
+	       *
+	       * _.trimEnd('  abc  ');
+	       * // => '  abc'
+	       *
+	       * _.trimEnd('-_-abc-_-', '_-');
+	       * // => '-_-abc'
+	       */
 
-	      if (cap) {
-	        var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
 
-	        if (lastToken && lastToken.type === 'paragraph') {
-	          return {
-	            raw: cap[0],
-	            text: cap[0].trimRight()
-	          };
+	      function trimEnd(string, chars, guard) {
+	        string = toString(string);
+
+	        if (string && (guard || chars === undefined$1)) {
+	          return string.slice(0, trimmedEndIndex(string) + 1);
 	        }
 
-	        var text = cap[0].replace(/^ {4}/gm, '');
-	        return {
-	          type: 'code',
-	          raw: cap[0],
-	          codeBlockStyle: 'indented',
-	          text: !this.options.pedantic ? rtrim$2(text, '\n') : text
-	        };
-	      }
-	    }
-	  }, {
-	    key: "fences",
-	    value: function fences(src) {
-	      var cap = this.rules.block.fences.exec(src);
+	        if (!string || !(chars = baseToString(chars))) {
+	          return string;
+	        }
 
-	      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
-	        };
+	        var strSymbols = stringToArray(string),
+	            end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
+	        return castSlice(strSymbols, 0, end).join('');
 	      }
-	    }
-	  }, {
-	    key: "heading",
-	    value: function heading(src) {
-	      var cap = this.rules.block.heading.exec(src);
+	      /**
+	       * Removes leading whitespace or specified characters from `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to trim.
+	       * @param {string} [chars=whitespace] The characters to trim.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the trimmed string.
+	       * @example
+	       *
+	       * _.trimStart('  abc  ');
+	       * // => 'abc  '
+	       *
+	       * _.trimStart('-_-abc-_-', '_-');
+	       * // => 'abc-_-'
+	       */
 
-	      if (cap) {
-	        return {
-	          type: 'heading',
-	          raw: cap[0],
-	          depth: cap[1].length,
-	          text: cap[2]
-	        };
-	      }
-	    }
-	  }, {
-	    key: "nptable",
-	    value: 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]
-	        };
+	      function trimStart(string, chars, guard) {
+	        string = toString(string);
 
-	        if (item.header.length === item.align.length) {
-	          var l = item.align.length;
-	          var i;
+	        if (string && (guard || chars === undefined$1)) {
+	          return string.replace(reTrimStart, '');
+	        }
 
-	          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 (!string || !(chars = baseToString(chars))) {
+	          return string;
+	        }
 
-	          l = item.cells.length;
+	        var strSymbols = stringToArray(string),
+	            start = charsStartIndex(strSymbols, stringToArray(chars));
+	        return castSlice(strSymbols, start).join('');
+	      }
+	      /**
+	       * Truncates `string` if it's longer than the given maximum string length.
+	       * The last characters of the truncated string are replaced with the omission
+	       * string which defaults to "...".
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to truncate.
+	       * @param {Object} [options={}] The options object.
+	       * @param {number} [options.length=30] The maximum string length.
+	       * @param {string} [options.omission='...'] The string to indicate text is omitted.
+	       * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
+	       * @returns {string} Returns the truncated string.
+	       * @example
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino');
+	       * // => 'hi-diddly-ho there, neighbo...'
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino', {
+	       *   'length': 24,
+	       *   'separator': ' '
+	       * });
+	       * // => 'hi-diddly-ho there,...'
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino', {
+	       *   'length': 24,
+	       *   'separator': /,? +/
+	       * });
+	       * // => 'hi-diddly-ho there...'
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino', {
+	       *   'omission': ' [...]'
+	       * });
+	       * // => 'hi-diddly-ho there, neig [...]'
+	       */
 
-	          for (i = 0; i < l; i++) {
-	            item.cells[i] = splitCells$1(item.cells[i], item.header.length);
-	          }
 
-	          return item;
+	      function truncate(string, options) {
+	        var length = DEFAULT_TRUNC_LENGTH,
+	            omission = DEFAULT_TRUNC_OMISSION;
+
+	        if (isObject(options)) {
+	          var separator = 'separator' in options ? options.separator : separator;
+	          length = 'length' in options ? toInteger(options.length) : length;
+	          omission = 'omission' in options ? baseToString(options.omission) : omission;
 	        }
-	      }
-	    }
-	  }, {
-	    key: "hr",
-	    value: function hr(src) {
-	      var cap = this.rules.block.hr.exec(src);
 
-	      if (cap) {
-	        return {
-	          type: 'hr',
-	          raw: cap[0]
-	        };
-	      }
-	    }
-	  }, {
-	    key: "blockquote",
-	    value: function blockquote(src) {
-	      var cap = this.rules.block.blockquote.exec(src);
+	        string = toString(string);
+	        var strLength = string.length;
 
-	      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 (hasUnicode(string)) {
+	          var strSymbols = stringToArray(string);
+	          strLength = strSymbols.length;
+	        }
 
-	      if (cap) {
-	        var raw = cap[0];
-	        var bull = cap[2];
-	        var isordered = bull.length > 1;
-	        var isparen = bull[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.
+	        if (length >= strLength) {
+	          return string;
+	        }
 
-	        var itemMatch = cap[0].match(this.rules.block.item);
-	        var next = false,
-	            item,
-	            space,
-	            b,
-	            addBack,
-	            loose,
-	            istask,
-	            ischecked;
-	        var l = itemMatch.length;
+	        var end = length - stringSize(omission);
 
-	        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.
+	        if (end < 1) {
+	          return omission;
+	        }
 
-	          space = item.length;
-	          item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
-	          // list item contains. Hacky.
+	        var result = strSymbols ? castSlice(strSymbols, 0, end).join('') : string.slice(0, end);
 
-	          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 (separator === undefined$1) {
+	          return result + omission;
+	        }
 
+	        if (strSymbols) {
+	          end += result.length - end;
+	        }
 
-	          if (i !== l - 1) {
-	            b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
+	        if (isRegExp(separator)) {
+	          if (string.slice(end).search(separator)) {
+	            var match,
+	                substring = result;
 
-	            if (isordered ? b.length === 1 || !isparen && b[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;
+	            if (!separator.global) {
+	              separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
 	            }
-	          } // Determine whether item is loose or not.
-	          // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-	          // for discount behavior.
 
+	            separator.lastIndex = 0;
 
-	          loose = next || /\n\n(?!\s*$)/.test(item);
+	            while (match = separator.exec(substring)) {
+	              var newEnd = match.index;
+	            }
 
-	          if (i !== l - 1) {
-	            next = item.charAt(item.length - 1) === '\n';
-	            if (!loose) loose = next;
+	            result = result.slice(0, newEnd === undefined$1 ? end : newEnd);
 	          }
+	        } else if (string.indexOf(baseToString(separator), end) != end) {
+	          var index = result.lastIndexOf(separator);
 
-	          if (loose) {
-	            list.loose = true;
-	          } // Check for task list items
+	          if (index > -1) {
+	            result = result.slice(0, index);
+	          }
+	        }
 
+	        return result + omission;
+	      }
+	      /**
+	       * The inverse of `_.escape`; this method converts the HTML entities
+	       * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
+	       * their corresponding characters.
+	       *
+	       * **Note:** No other HTML entities are unescaped. To unescape additional
+	       * HTML entities use a third-party library like [_he_](https://mths.be/he).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.6.0
+	       * @category String
+	       * @param {string} [string=''] The string to unescape.
+	       * @returns {string} Returns the unescaped string.
+	       * @example
+	       *
+	       * _.unescape('fred, barney, &amp; pebbles');
+	       * // => 'fred, barney, & pebbles'
+	       */
 
-	          istask = /^\[[ xX]\] /.test(item);
-	          ischecked = undefined;
 
-	          if (istask) {
-	            ischecked = item[1] !== ' ';
-	            item = item.replace(/^\[[ xX]\] +/, '');
-	          }
+	      function unescape(string) {
+	        string = toString(string);
+	        return string && reHasEscapedHtml.test(string) ? string.replace(reEscapedHtml, unescapeHtmlChar) : string;
+	      }
+	      /**
+	       * Converts `string`, as space separated words, to upper case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the upper cased string.
+	       * @example
+	       *
+	       * _.upperCase('--foo-bar');
+	       * // => 'FOO BAR'
+	       *
+	       * _.upperCase('fooBar');
+	       * // => 'FOO BAR'
+	       *
+	       * _.upperCase('__foo_bar__');
+	       * // => 'FOO BAR'
+	       */
 
-	          list.items.push({
-	            type: 'list_item',
-	            raw: raw,
-	            task: istask,
-	            checked: ischecked,
-	            loose: loose,
-	            text: item
-	          });
+
+	      var upperCase = createCompounder(function (result, word, index) {
+	        return result + (index ? ' ' : '') + word.toUpperCase();
+	      });
+	      /**
+	       * Converts the first character of `string` to upper case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the converted string.
+	       * @example
+	       *
+	       * _.upperFirst('fred');
+	       * // => 'Fred'
+	       *
+	       * _.upperFirst('FRED');
+	       * // => 'FRED'
+	       */
+
+	      var upperFirst = createCaseFirst('toUpperCase');
+	      /**
+	       * Splits `string` into an array of its words.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to inspect.
+	       * @param {RegExp|string} [pattern] The pattern to match words.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the words of `string`.
+	       * @example
+	       *
+	       * _.words('fred, barney, & pebbles');
+	       * // => ['fred', 'barney', 'pebbles']
+	       *
+	       * _.words('fred, barney, & pebbles', /[^, ]+/g);
+	       * // => ['fred', 'barney', '&', 'pebbles']
+	       */
+
+	      function words(string, pattern, guard) {
+	        string = toString(string);
+	        pattern = guard ? undefined$1 : pattern;
+
+	        if (pattern === undefined$1) {
+	          return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
 	        }
 
-	        return list;
+	        return string.match(pattern) || [];
 	      }
-	    }
-	  }, {
-	    key: "html",
-	    value: 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(cap[0]) : cap[0]
-	        };
-	      }
-	    }
-	  }, {
-	    key: "def",
-	    value: function def(src) {
-	      var cap = this.rules.block.def.exec(src);
+	      /**
+	       * Attempts to invoke `func`, returning either the result or the caught error
+	       * object. Any additional arguments are provided to `func` when it's invoked.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {Function} func The function to attempt.
+	       * @param {...*} [args] The arguments to invoke `func` with.
+	       * @returns {*} Returns the `func` result or error object.
+	       * @example
+	       *
+	       * // Avoid throwing errors for invalid selectors.
+	       * var elements = _.attempt(function(selector) {
+	       *   return document.querySelectorAll(selector);
+	       * }, '>_>');
+	       *
+	       * if (_.isError(elements)) {
+	       *   elements = [];
+	       * }
+	       */
 
-	      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]
-	        };
-	      }
-	    }
-	  }, {
-	    key: "table",
-	    value: 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') : []
-	        };
+	      var attempt = baseRest(function (func, args) {
+	        try {
+	          return apply(func, undefined$1, args);
+	        } catch (e) {
+	          return isError(e) ? e : new Error(e);
+	        }
+	      });
+	      /**
+	       * Binds methods of an object to the object itself, overwriting the existing
+	       * method.
+	       *
+	       * **Note:** This method doesn't set the "length" property of bound functions.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {Object} object The object to bind and assign the bound methods to.
+	       * @param {...(string|string[])} methodNames The object method names to bind.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var view = {
+	       *   'label': 'docs',
+	       *   'click': function() {
+	       *     console.log('clicked ' + this.label);
+	       *   }
+	       * };
+	       *
+	       * _.bindAll(view, ['click']);
+	       * jQuery(element).on('click', view.click);
+	       * // => Logs 'clicked docs' when clicked.
+	       */
 
-	        if (item.header.length === item.align.length) {
-	          item.raw = cap[0];
-	          var l = item.align.length;
-	          var i;
+	      var bindAll = flatRest(function (object, methodNames) {
+	        arrayEach(methodNames, function (key) {
+	          key = toKey(key);
+	          baseAssignValue(object, key, bind(object[key], object));
+	        });
+	        return object;
+	      });
+	      /**
+	       * Creates a function that iterates over `pairs` and invokes the corresponding
+	       * function of the first predicate to return truthy. The predicate-function
+	       * pairs are invoked with the `this` binding and arguments of the created
+	       * function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {Array} pairs The predicate-function pairs.
+	       * @returns {Function} Returns the new composite function.
+	       * @example
+	       *
+	       * var func = _.cond([
+	       *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
+	       *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
+	       *   [_.stubTrue,                      _.constant('no match')]
+	       * ]);
+	       *
+	       * func({ 'a': 1, 'b': 2 });
+	       * // => 'matches A'
+	       *
+	       * func({ 'a': 0, 'b': 1 });
+	       * // => 'matches B'
+	       *
+	       * func({ 'a': '1', 'b': '2' });
+	       * // => 'no match'
+	       */
 
-	          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;
-	            }
+	      function cond(pairs) {
+	        var length = pairs == null ? 0 : pairs.length,
+	            toIteratee = getIteratee();
+	        pairs = !length ? [] : arrayMap(pairs, function (pair) {
+	          if (typeof pair[1] != 'function') {
+	            throw new TypeError(FUNC_ERROR_TEXT);
 	          }
 
-	          l = item.cells.length;
+	          return [toIteratee(pair[0]), pair[1]];
+	        });
+	        return baseRest(function (args) {
+	          var index = -1;
 
-	          for (i = 0; i < l; i++) {
-	            item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+	          while (++index < length) {
+	            var pair = pairs[index];
+
+	            if (apply(pair[0], this, args)) {
+	              return apply(pair[1], this, args);
+	            }
 	          }
+	        });
+	      }
+	      /**
+	       * Creates a function that invokes the predicate properties of `source` with
+	       * the corresponding property values of a given object, returning `true` if
+	       * all predicates return truthy, else `false`.
+	       *
+	       * **Note:** The created function is equivalent to `_.conformsTo` with
+	       * `source` partially applied.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {Function} Returns the new spec function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': 2, 'b': 1 },
+	       *   { 'a': 1, 'b': 2 }
+	       * ];
+	       *
+	       * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
+	       * // => [{ 'a': 1, 'b': 2 }]
+	       */
 
-	          return item;
-	        }
+
+	      function conforms(source) {
+	        return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
 	      }
-	    }
-	  }, {
-	    key: "lheading",
-	    value: function lheading(src) {
-	      var cap = this.rules.block.lheading.exec(src);
+	      /**
+	       * Creates a function that returns `value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Util
+	       * @param {*} value The value to return from the new function.
+	       * @returns {Function} Returns the new constant function.
+	       * @example
+	       *
+	       * var objects = _.times(2, _.constant({ 'a': 1 }));
+	       *
+	       * console.log(objects);
+	       * // => [{ 'a': 1 }, { 'a': 1 }]
+	       *
+	       * console.log(objects[0] === objects[1]);
+	       * // => true
+	       */
 
-	      if (cap) {
-	        return {
-	          type: 'heading',
-	          raw: cap[0],
-	          depth: cap[2].charAt(0) === '=' ? 1 : 2,
-	          text: cap[1]
+
+	      function constant(value) {
+	        return function () {
+	          return value;
 	        };
 	      }
-	    }
-	  }, {
-	    key: "paragraph",
-	    value: function paragraph(src) {
-	      var cap = this.rules.block.paragraph.exec(src);
+	      /**
+	       * Checks `value` to determine whether a default value should be returned in
+	       * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
+	       * or `undefined`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.14.0
+	       * @category Util
+	       * @param {*} value The value to check.
+	       * @param {*} defaultValue The default value.
+	       * @returns {*} Returns the resolved value.
+	       * @example
+	       *
+	       * _.defaultTo(1, 10);
+	       * // => 1
+	       *
+	       * _.defaultTo(undefined, 10);
+	       * // => 10
+	       */
 
-	      if (cap) {
-	        return {
-	          type: 'paragraph',
-	          raw: cap[0],
-	          text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
-	        };
+
+	      function defaultTo(value, defaultValue) {
+	        return value == null || value !== value ? defaultValue : value;
 	      }
-	    }
-	  }, {
-	    key: "text",
-	    value: function text(src, tokens) {
-	      var cap = this.rules.block.text.exec(src);
+	      /**
+	       * Creates a function that returns the result of invoking the given functions
+	       * with the `this` binding of the created function, where each successive
+	       * invocation is supplied the return value of the previous.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [funcs] The functions to invoke.
+	       * @returns {Function} Returns the new composite function.
+	       * @see _.flowRight
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var addSquare = _.flow([_.add, square]);
+	       * addSquare(1, 2);
+	       * // => 9
+	       */
 
-	      if (cap) {
-	        var lastToken = tokens[tokens.length - 1];
 
-	        if (lastToken && lastToken.type === 'text') {
-	          return {
-	            raw: cap[0],
-	            text: cap[0]
-	          };
-	        }
+	      var flow = createFlow();
+	      /**
+	       * This method is like `_.flow` except that it creates a function that
+	       * invokes the given functions from right to left.
+	       *
+	       * @static
+	       * @since 3.0.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {...(Function|Function[])} [funcs] The functions to invoke.
+	       * @returns {Function} Returns the new composite function.
+	       * @see _.flow
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var addSquare = _.flowRight([square, _.add]);
+	       * addSquare(1, 2);
+	       * // => 9
+	       */
 
-	        return {
-	          type: 'text',
-	          raw: cap[0],
-	          text: cap[0]
-	        };
-	      }
-	    }
-	  }, {
-	    key: "escape",
-	    value: function escape(src) {
-	      var cap = this.rules.inline.escape.exec(src);
+	      var flowRight = createFlow(true);
+	      /**
+	       * This method returns the first argument it receives.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {*} value Any value.
+	       * @returns {*} Returns `value`.
+	       * @example
+	       *
+	       * var object = { 'a': 1 };
+	       *
+	       * console.log(_.identity(object) === object);
+	       * // => true
+	       */
 
-	      if (cap) {
-	        return {
-	          type: 'escape',
-	          raw: cap[0],
-	          text: _escape(cap[1])
-	        };
+	      function identity(value) {
+	        return value;
 	      }
-	    }
-	  }, {
-	    key: "tag",
-	    value: function tag(src, inLink, inRawBlock) {
-	      var cap = this.rules.inline.tag.exec(src);
+	      /**
+	       * Creates a function that invokes `func` with the arguments of the created
+	       * function. If `func` is a property name, the created function returns the
+	       * property value for a given element. If `func` is an array or object, the
+	       * created function returns `true` for elements that contain the equivalent
+	       * source properties, otherwise it returns `false`.
+	       *
+	       * @static
+	       * @since 4.0.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {*} [func=_.identity] The value to convert to a callback.
+	       * @returns {Function} Returns the callback.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': true },
+	       *   { 'user': 'fred',   'age': 40, 'active': false }
+	       * ];
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
+	       * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.filter(users, _.iteratee(['user', 'fred']));
+	       * // => [{ 'user': 'fred', 'age': 40 }]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.map(users, _.iteratee('user'));
+	       * // => ['barney', 'fred']
+	       *
+	       * // Create custom iteratee shorthands.
+	       * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
+	       *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
+	       *     return func.test(string);
+	       *   };
+	       * });
+	       *
+	       * _.filter(['abc', 'def'], /ef/);
+	       * // => ['def']
+	       */
 
-	      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;
-	        }
+	      function iteratee(func) {
+	        return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
+	      }
+	      /**
+	       * Creates a function that performs a partial deep comparison between a given
+	       * object and `source`, returning `true` if the given object has equivalent
+	       * property values, else `false`.
+	       *
+	       * **Note:** The created function is equivalent to `_.isMatch` with `source`
+	       * partially applied.
+	       *
+	       * Partial comparisons will match empty array and empty object `source`
+	       * values against any array or object value, respectively. See `_.isEqual`
+	       * for a list of supported value comparisons.
+	       *
+	       * **Note:** Multiple values can be checked by combining several matchers
+	       * using `_.overSome`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {Object} source The object of property values to match.
+	       * @returns {Function} Returns the new spec function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': 1, 'b': 2, 'c': 3 },
+	       *   { 'a': 4, 'b': 5, 'c': 6 }
+	       * ];
+	       *
+	       * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
+	       * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
+	       *
+	       * // Checking for several possible values
+	       * _.filter(objects, _.overSome([_.matches({ 'a': 1 }), _.matches({ 'a': 4 })]));
+	       * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
+	       */
 
-	        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]
-	        };
+
+	      function matches(source) {
+	        return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
 	      }
-	    }
-	  }, {
-	    key: "link",
-	    value: function link(src) {
-	      var cap = this.rules.inline.link.exec(src);
+	      /**
+	       * Creates a function that performs a partial deep comparison between the
+	       * value at `path` of a given object to `srcValue`, returning `true` if the
+	       * object value is equivalent, else `false`.
+	       *
+	       * **Note:** Partial comparisons will match empty array and empty object
+	       * `srcValue` values against any array or object value, respectively. See
+	       * `_.isEqual` for a list of supported value comparisons.
+	       *
+	       * **Note:** Multiple values can be checked by combining several matchers
+	       * using `_.overSome`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Util
+	       * @param {Array|string} path The path of the property to get.
+	       * @param {*} srcValue The value to match.
+	       * @returns {Function} Returns the new spec function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': 1, 'b': 2, 'c': 3 },
+	       *   { 'a': 4, 'b': 5, 'c': 6 }
+	       * ];
+	       *
+	       * _.find(objects, _.matchesProperty('a', 4));
+	       * // => { 'a': 4, 'b': 5, 'c': 6 }
+	       *
+	       * // Checking for several possible values
+	       * _.filter(objects, _.overSome([_.matchesProperty('a', 1), _.matchesProperty('a', 4)]));
+	       * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
+	       */
 
-	      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] = '';
-	        }
+	      function matchesProperty(path, srcValue) {
+	        return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
+	      }
+	      /**
+	       * Creates a function that invokes the method at `path` of a given object.
+	       * Any additional arguments are provided to the invoked method.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Util
+	       * @param {Array|string} path The path of the method to invoke.
+	       * @param {...*} [args] The arguments to invoke the method with.
+	       * @returns {Function} Returns the new invoker function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': { 'b': _.constant(2) } },
+	       *   { 'a': { 'b': _.constant(1) } }
+	       * ];
+	       *
+	       * _.map(objects, _.method('a.b'));
+	       * // => [2, 1]
+	       *
+	       * _.map(objects, _.method(['a', 'b']));
+	       * // => [2, 1]
+	       */
 
-	        var href = cap[2];
-	        var title = '';
 
-	        if (this.options.pedantic) {
-	          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+	      var method = baseRest(function (path, args) {
+	        return function (object) {
+	          return baseInvoke(object, path, args);
+	        };
+	      });
+	      /**
+	       * The opposite of `_.method`; this method creates a function that invokes
+	       * the method at a given path of `object`. Any additional arguments are
+	       * provided to the invoked method.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Util
+	       * @param {Object} object The object to query.
+	       * @param {...*} [args] The arguments to invoke the method with.
+	       * @returns {Function} Returns the new invoker function.
+	       * @example
+	       *
+	       * var array = _.times(3, _.constant),
+	       *     object = { 'a': array, 'b': array, 'c': array };
+	       *
+	       * _.map(['a[2]', 'c[0]'], _.methodOf(object));
+	       * // => [2, 0]
+	       *
+	       * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
+	       * // => [2, 0]
+	       */
 
-	          if (link) {
-	            href = link[1];
-	            title = link[3];
-	          } else {
-	            title = '';
-	          }
-	        } else {
-	          title = cap[3] ? cap[3].slice(1, -1) : '';
-	        }
+	      var methodOf = baseRest(function (object, args) {
+	        return function (path) {
+	          return baseInvoke(object, path, args);
+	        };
+	      });
+	      /**
+	       * Adds all own enumerable string keyed function properties of a source
+	       * object to the destination object. If `object` is a function, then methods
+	       * are added to its prototype as well.
+	       *
+	       * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
+	       * avoid conflicts caused by modifying the original.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {Function|Object} [object=lodash] The destination object.
+	       * @param {Object} source The object of functions to add.
+	       * @param {Object} [options={}] The options object.
+	       * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
+	       * @returns {Function|Object} Returns `object`.
+	       * @example
+	       *
+	       * function vowels(string) {
+	       *   return _.filter(string, function(v) {
+	       *     return /[aeiou]/i.test(v);
+	       *   });
+	       * }
+	       *
+	       * _.mixin({ 'vowels': vowels });
+	       * _.vowels('fred');
+	       * // => ['e']
+	       *
+	       * _('fred').vowels().value();
+	       * // => ['e']
+	       *
+	       * _.mixin({ 'vowels': vowels }, { 'chain': false });
+	       * _('fred').vowels();
+	       * // => ['e']
+	       */
 
-	        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;
+	      function mixin(object, source, options) {
+	        var props = keys(source),
+	            methodNames = baseFunctions(source, props);
+
+	        if (options == null && !(isObject(source) && (methodNames.length || !props.length))) {
+	          options = source;
+	          source = object;
+	          object = this;
+	          methodNames = baseFunctions(source, keys(source));
+	        }
+
+	        var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
+	            isFunc = isFunction(object);
+	        arrayEach(methodNames, function (methodName) {
+	          var func = source[methodName];
+	          object[methodName] = func;
+
+	          if (isFunc) {
+	            object.prototype[methodName] = function () {
+	              var chainAll = this.__chain__;
+
+	              if (chain || chainAll) {
+	                var result = object(this.__wrapped__),
+	                    actions = result.__actions__ = copyArray(this.__actions__);
+	                actions.push({
+	                  'func': func,
+	                  'args': arguments,
+	                  'thisArg': object
+	                });
+	                result.__chain__ = chainAll;
+	                return result;
+	              }
+
+	              return func.apply(object, arrayPush([this.value()], arguments));
+	            };
+	          }
+	        });
+	        return object;
 	      }
-	    }
-	  }, {
-	    key: "reflink",
-	    value: function reflink(src, links) {
-	      var cap;
+	      /**
+	       * Reverts the `_` variable to its previous value and returns a reference to
+	       * the `lodash` function.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @returns {Function} Returns the `lodash` function.
+	       * @example
+	       *
+	       * var lodash = _.noConflict();
+	       */
 
-	      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
-	          };
+	      function noConflict() {
+	        if (root._ === this) {
+	          root._ = oldDash;
 	        }
 
-	        var token = outputLink(cap, link, cap[0]);
-	        return token;
+	        return this;
 	      }
-	    }
-	  }, {
-	    key: "strong",
-	    value: function strong(src, maskedSrc) {
-	      var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
-	      var match = this.rules.inline.strong.start.exec(src);
-
-	      if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
-	        maskedSrc = maskedSrc.slice(-1 * src.length);
-	        var endReg = match[0] === '**' ? this.rules.inline.strong.endAst : this.rules.inline.strong.endUnd;
-	        endReg.lastIndex = 0;
-	        var cap;
+	      /**
+	       * This method returns `undefined`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.3.0
+	       * @category Util
+	       * @example
+	       *
+	       * _.times(2, _.noop);
+	       * // => [undefined, undefined]
+	       */
 
-	        while ((match = endReg.exec(maskedSrc)) != null) {
-	          cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));
 
-	          if (cap) {
-	            return {
-	              type: 'strong',
-	              raw: src.slice(0, cap[0].length),
-	              text: src.slice(2, cap[0].length - 2)
-	            };
-	          }
-	        }
+	      function noop() {// No operation performed.
 	      }
-	    }
-	  }, {
-	    key: "em",
-	    value: function em(src, maskedSrc) {
-	      var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
-	      var match = this.rules.inline.em.start.exec(src);
-
-	      if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
-	        maskedSrc = maskedSrc.slice(-1 * src.length);
-	        var endReg = match[0] === '*' ? this.rules.inline.em.endAst : this.rules.inline.em.endUnd;
-	        endReg.lastIndex = 0;
-	        var cap;
+	      /**
+	       * Creates a function that gets the argument at index `n`. If `n` is negative,
+	       * the nth argument from the end is returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {number} [n=0] The index of the argument to return.
+	       * @returns {Function} Returns the new pass-thru function.
+	       * @example
+	       *
+	       * var func = _.nthArg(1);
+	       * func('a', 'b', 'c', 'd');
+	       * // => 'b'
+	       *
+	       * var func = _.nthArg(-2);
+	       * func('a', 'b', 'c', 'd');
+	       * // => 'c'
+	       */
 
-	        while ((match = endReg.exec(maskedSrc)) != null) {
-	          cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));
 
-	          if (cap) {
-	            return {
-	              type: 'em',
-	              raw: src.slice(0, cap[0].length),
-	              text: src.slice(1, cap[0].length - 1)
-	            };
-	          }
-	        }
+	      function nthArg(n) {
+	        n = toInteger(n);
+	        return baseRest(function (args) {
+	          return baseNth(args, n);
+	        });
 	      }
-	    }
-	  }, {
-	    key: "codespan",
-	    value: function codespan(src) {
-	      var cap = this.rules.inline.code.exec(src);
+	      /**
+	       * Creates a function that invokes `iteratees` with the arguments it receives
+	       * and returns their results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [iteratees=[_.identity]]
+	       *  The iteratees to invoke.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var func = _.over([Math.max, Math.min]);
+	       *
+	       * func(1, 2, 3, 4);
+	       * // => [4, 1]
+	       */
 
-	      if (cap) {
-	        var text = cap[2].replace(/\n/g, ' ');
-	        var hasNonSpaceChars = /[^ ]/.test(text);
-	        var hasSpaceCharsOnBothEnds = text.startsWith(' ') && text.endsWith(' ');
 
-	        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
-	          text = text.substring(1, text.length - 1);
-	        }
+	      var over = createOver(arrayMap);
+	      /**
+	       * Creates a function that checks if **all** of the `predicates` return
+	       * truthy when invoked with the arguments it receives.
+	       *
+	       * Following shorthands are possible for providing predicates.
+	       * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
+	       * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [predicates=[_.identity]]
+	       *  The predicates to check.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var func = _.overEvery([Boolean, isFinite]);
+	       *
+	       * func('1');
+	       * // => true
+	       *
+	       * func(null);
+	       * // => false
+	       *
+	       * func(NaN);
+	       * // => false
+	       */
 
-	        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);
+	      var overEvery = createOver(arrayEvery);
+	      /**
+	       * Creates a function that checks if **any** of the `predicates` return
+	       * truthy when invoked with the arguments it receives.
+	       *
+	       * Following shorthands are possible for providing predicates.
+	       * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
+	       * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [predicates=[_.identity]]
+	       *  The predicates to check.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var func = _.overSome([Boolean, isFinite]);
+	       *
+	       * func('1');
+	       * // => true
+	       *
+	       * func(null);
+	       * // => true
+	       *
+	       * func(NaN);
+	       * // => false
+	       *
+	       * var matchesFunc = _.overSome([{ 'a': 1 }, { 'a': 2 }])
+	       * var matchesPropertyFunc = _.overSome([['a', 1], ['a', 2]])
+	       */
 
-	      if (cap) {
-	        return {
-	          type: 'br',
-	          raw: cap[0]
-	        };
+	      var overSome = createOver(arraySome);
+	      /**
+	       * Creates a function that returns the value at `path` of a given object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Util
+	       * @param {Array|string} path The path of the property to get.
+	       * @returns {Function} Returns the new accessor function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': { 'b': 2 } },
+	       *   { 'a': { 'b': 1 } }
+	       * ];
+	       *
+	       * _.map(objects, _.property('a.b'));
+	       * // => [2, 1]
+	       *
+	       * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+	       * // => [1, 2]
+	       */
+
+	      function property(path) {
+	        return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 	      }
-	    }
-	  }, {
-	    key: "del",
-	    value: function del(src) {
-	      var cap = this.rules.inline.del.exec(src);
+	      /**
+	       * The opposite of `_.property`; this method creates a function that returns
+	       * the value at a given path of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {Object} object The object to query.
+	       * @returns {Function} Returns the new accessor function.
+	       * @example
+	       *
+	       * var array = [0, 1, 2],
+	       *     object = { 'a': array, 'b': array, 'c': array };
+	       *
+	       * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
+	       * // => [2, 0]
+	       *
+	       * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
+	       * // => [2, 0]
+	       */
 
-	      if (cap) {
-	        return {
-	          type: 'del',
-	          raw: cap[0],
-	          text: cap[1]
+
+	      function propertyOf(object) {
+	        return function (path) {
+	          return object == null ? undefined$1 : baseGet(object, path);
 	        };
 	      }
-	    }
-	  }, {
-	    key: "autolink",
-	    value: function autolink(src, mangle) {
-	      var cap = this.rules.inline.autolink.exec(src);
+	      /**
+	       * Creates an array of numbers (positive and/or negative) progressing from
+	       * `start` up to, but not including, `end`. A step of `-1` is used if a negative
+	       * `start` is specified without an `end` or `step`. If `end` is not specified,
+	       * it's set to `start` with `start` then set to `0`.
+	       *
+	       * **Note:** JavaScript follows the IEEE-754 standard for resolving
+	       * floating-point values which can produce unexpected results.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {number} [start=0] The start of the range.
+	       * @param {number} end The end of the range.
+	       * @param {number} [step=1] The value to increment or decrement by.
+	       * @returns {Array} Returns the range of numbers.
+	       * @see _.inRange, _.rangeRight
+	       * @example
+	       *
+	       * _.range(4);
+	       * // => [0, 1, 2, 3]
+	       *
+	       * _.range(-4);
+	       * // => [0, -1, -2, -3]
+	       *
+	       * _.range(1, 5);
+	       * // => [1, 2, 3, 4]
+	       *
+	       * _.range(0, 20, 5);
+	       * // => [0, 5, 10, 15]
+	       *
+	       * _.range(0, -4, -1);
+	       * // => [0, -1, -2, -3]
+	       *
+	       * _.range(1, 4, 0);
+	       * // => [1, 1, 1]
+	       *
+	       * _.range(0);
+	       * // => []
+	       */
 
-	      if (cap) {
-	        var text, href;
 
-	        if (cap[2] === '@') {
-	          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
-	          href = 'mailto:' + text;
-	        } else {
-	          text = _escape(cap[1]);
-	          href = text;
-	        }
+	      var range = createRange();
+	      /**
+	       * This method is like `_.range` except that it populates values in
+	       * descending order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {number} [start=0] The start of the range.
+	       * @param {number} end The end of the range.
+	       * @param {number} [step=1] The value to increment or decrement by.
+	       * @returns {Array} Returns the range of numbers.
+	       * @see _.inRange, _.range
+	       * @example
+	       *
+	       * _.rangeRight(4);
+	       * // => [3, 2, 1, 0]
+	       *
+	       * _.rangeRight(-4);
+	       * // => [-3, -2, -1, 0]
+	       *
+	       * _.rangeRight(1, 5);
+	       * // => [4, 3, 2, 1]
+	       *
+	       * _.rangeRight(0, 20, 5);
+	       * // => [15, 10, 5, 0]
+	       *
+	       * _.rangeRight(0, -4, -1);
+	       * // => [-3, -2, -1, 0]
+	       *
+	       * _.rangeRight(1, 4, 0);
+	       * // => [1, 1, 1]
+	       *
+	       * _.rangeRight(0);
+	       * // => []
+	       */
 
-	        return {
-	          type: 'link',
-	          raw: cap[0],
-	          text: text,
-	          href: href,
-	          tokens: [{
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }]
-	        };
+	      var rangeRight = createRange(true);
+	      /**
+	       * This method returns a new empty array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {Array} Returns the new empty array.
+	       * @example
+	       *
+	       * var arrays = _.times(2, _.stubArray);
+	       *
+	       * console.log(arrays);
+	       * // => [[], []]
+	       *
+	       * console.log(arrays[0] === arrays[1]);
+	       * // => false
+	       */
+
+	      function stubArray() {
+	        return [];
 	      }
-	    }
-	  }, {
-	    key: "url",
-	    value: function url(src, mangle) {
-	      var cap;
+	      /**
+	       * This method returns `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {boolean} Returns `false`.
+	       * @example
+	       *
+	       * _.times(2, _.stubFalse);
+	       * // => [false, false]
+	       */
 
-	      if (cap = this.rules.inline.url.exec(src)) {
-	        var text, href;
 
-	        if (cap[2] === '@') {
-	          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
-	          href = 'mailto:' + text;
-	        } else {
-	          // do extended autolink path validation
-	          var prevCapZero;
+	      function stubFalse() {
+	        return false;
+	      }
+	      /**
+	       * This method returns a new empty object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {Object} Returns the new empty object.
+	       * @example
+	       *
+	       * var objects = _.times(2, _.stubObject);
+	       *
+	       * console.log(objects);
+	       * // => [{}, {}]
+	       *
+	       * console.log(objects[0] === objects[1]);
+	       * // => false
+	       */
 
-	          do {
-	            prevCapZero = cap[0];
-	            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-	          } while (prevCapZero !== cap[0]);
 
-	          text = _escape(cap[0]);
+	      function stubObject() {
+	        return {};
+	      }
+	      /**
+	       * This method returns an empty string.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {string} Returns the empty string.
+	       * @example
+	       *
+	       * _.times(2, _.stubString);
+	       * // => ['', '']
+	       */
 
-	          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
-	          }]
-	        };
+	      function stubString() {
+	        return '';
 	      }
-	    }
-	  }, {
-	    key: "inlineText",
-	    value: function inlineText(src, inRawBlock, smartypants) {
-	      var cap = this.rules.inline.text.exec(src);
-
-	      if (cap) {
-	        var text;
+	      /**
+	       * This method returns `true`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {boolean} Returns `true`.
+	       * @example
+	       *
+	       * _.times(2, _.stubTrue);
+	       * // => [true, 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]);
-	        }
 
-	        return {
-	          type: 'text',
-	          raw: cap[0],
-	          text: text
-	        };
+	      function stubTrue() {
+	        return true;
 	      }
-	    }
-	  }]);
+	      /**
+	       * Invokes the iteratee `n` times, returning an array of the results of
+	       * each invocation. The iteratee is invoked with one argument; (index).
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {number} n The number of times to invoke `iteratee`.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the array of results.
+	       * @example
+	       *
+	       * _.times(3, String);
+	       * // => ['0', '1', '2']
+	       *
+	       *  _.times(4, _.constant(0));
+	       * // => [0, 0, 0, 0]
+	       */
 
-	  return Tokenizer;
-	}();
 
-	var noopTest$1 = helpers.noopTest,
-	    edit$1 = helpers.edit,
-	    merge$2 = helpers.merge;
-	/**
-	 * Block-Level Grammar
-	 */
+	      function times(n, iteratee) {
+	        n = toInteger(n);
 
-	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]+/
-	};
-	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();
-	/**
-	 * Normal Block Grammar
-	 */
+	        if (n < 1 || n > MAX_SAFE_INTEGER) {
+	          return [];
+	        }
 
-	block.normal = merge$2({}, block);
-	/**
-	 * GFM Block Grammar
-	 */
+	        var index = MAX_ARRAY_LENGTH,
+	            length = nativeMin(n, MAX_ARRAY_LENGTH);
+	        iteratee = getIteratee(iteratee);
+	        n -= MAX_ARRAY_LENGTH;
+	        var result = baseTimes(length, iteratee);
 
-	block.gfm = merge$2({}, block.normal, {
-	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
-	  + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
-	  + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
-	  // Cells
-	  table: '^ *\\|(.+)\\n' // Header
-	  + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
-	  + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
+	        while (++index < n) {
+	          iteratee(index);
+	        }
 
-	});
-	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();
-	/**
-	 * Pedantic grammar (original John Gruber's loose markdown specification)
-	 */
+	        return result;
+	      }
+	      /**
+	       * Converts `value` to a property path array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {*} value The value to convert.
+	       * @returns {Array} Returns the new property path array.
+	       * @example
+	       *
+	       * _.toPath('a.b.c');
+	       * // => ['a', 'b', 'c']
+	       *
+	       * _.toPath('a[0].b.c');
+	       * // => ['a', '0', 'b', 'c']
+	       */
 
-	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: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-	  reflinkSearch: 'reflink|nolink(?!\\()',
-	  strong: {
-	    start: /^(?:(\*\*(?=[*punctuation]))|\*\*)(?![\s])|__/,
-	    // (1) returns if starts w/ punctuation
-	    middle: /^\*\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*\*$|^__(?![\s])((?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?)__$/,
-	    endAst: /[^punctuation\s]\*\*(?!\*)|[punctuation]\*\*(?!\*)(?:(?=[punctuation_\s]|$))/,
-	    // last char can't be punct, or final * must also be followed by punct (or endline)
-	    endUnd: /[^\s]__(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)
+	      function toPath(value) {
+	        if (isArray(value)) {
+	          return arrayMap(value, toKey);
+	        }
 
-	  },
-	  em: {
-	    start: /^(?:(\*(?=[punctuation]))|\*)(?![*\s])|_/,
-	    // (1) returns if starts w/ punctuation
-	    middle: /^\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*$|^_(?![_\s])(?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?_$/,
-	    endAst: /[^punctuation\s]\*(?!\*)|[punctuation]\*(?!\*)(?:(?=[punctuation_\s]|$))/,
-	    // last char can't be punct, or final * must also be followed by punct (or endline)
-	    endUnd: /[^\s]_(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)
+	        return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
+	      }
+	      /**
+	       * Generates a unique ID. If `prefix` is given, the ID is appended to it.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {string} [prefix=''] The value to prefix the ID with.
+	       * @returns {string} Returns the unique ID.
+	       * @example
+	       *
+	       * _.uniqueId('contact_');
+	       * // => 'contact_104'
+	       *
+	       * _.uniqueId();
+	       * // => '105'
+	       */
 
-	  },
-	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
-	  br: /^( {2,}|\\)\n(?!\s*$)/,
-	  del: noopTest$1,
-	  text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n)))/,
-	  punctuation: /^([\s*punctuation])/
-	}; // list of punctuation marks from common mark spec
-	// without * and _ to workaround cases with double emphasis
-
-	inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
-	inline.punctuation = edit$1(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
-
-	inline._blockSkip = '\\[[^\\]]*?\\]\\([^\\)]*?\\)|`[^`]*?`|<[^>]*?>';
-	inline._overlapSkip = '__[^_]*?__|\\*\\*\\[^\\*\\]*?\\*\\*';
-	inline._comment = edit$1(block._comment).replace('(?:-->|$)', '-->').getRegex();
-	inline.em.start = edit$1(inline.em.start).replace(/punctuation/g, inline._punctuation).getRegex();
-	inline.em.middle = edit$1(inline.em.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
-	inline.em.endAst = edit$1(inline.em.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-	inline.em.endUnd = edit$1(inline.em.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-	inline.strong.start = edit$1(inline.strong.start).replace(/punctuation/g, inline._punctuation).getRegex();
-	inline.strong.middle = edit$1(inline.strong.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
-	inline.strong.endAst = edit$1(inline.strong.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-	inline.strong.endUnd = edit$1(inline.strong.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-	inline.blockSkip = edit$1(inline._blockSkip, 'g').getRegex();
-	inline.overlapSkip = edit$1(inline._overlapSkip, 'g').getRegex();
-	inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
-	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();
-	inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
-	inline.tag = edit$1(inline.tag).replace('comment', inline._comment).replace('attribute', inline._attribute).getRegex();
-	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();
-	inline.reflink = edit$1(inline.reflink).replace('label', inline._label).getRegex();
-	inline.reflinkSearch = edit$1(inline.reflinkSearch, 'g').replace('reflink', inline.reflink).replace('nolink', inline.nolink).getRegex();
-	/**
-	 * Normal Inline Grammar
-	 */
 
-	inline.normal = merge$2({}, inline);
-	/**
-	 * Pedantic Inline Grammar
-	 */
+	      function uniqueId(prefix) {
+	        var id = ++idCounter;
+	        return toString(prefix) + id;
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	inline.pedantic = merge$2({}, inline.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$1(/^!?\[(label)\]\((.*?)\)/).replace('label', inline._label).getRegex(),
-	  reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline._label).getRegex()
-	});
-	/**
-	 * GFM Inline Grammar
-	 */
+	      /**
+	       * Adds two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.4.0
+	       * @category Math
+	       * @param {number} augend The first number in an addition.
+	       * @param {number} addend The second number in an addition.
+	       * @returns {number} Returns the total.
+	       * @example
+	       *
+	       * _.add(6, 4);
+	       * // => 10
+	       */
 
-	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: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-	});
-	inline.gfm.url = edit$1(inline.gfm.url, 'i').replace('email', inline.gfm._extended_email).getRegex();
-	/**
-	 * GFM + Line Breaks Inline Grammar
-	 */
 
-	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()
-	});
-	var rules = {
-	  block: block,
-	  inline: inline
-	};
+	      var add = createMathOperation(function (augend, addend) {
+	        return augend + addend;
+	      }, 0);
+	      /**
+	       * Computes `number` rounded up to `precision`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Math
+	       * @param {number} number The number to round up.
+	       * @param {number} [precision=0] The precision to round up to.
+	       * @returns {number} Returns the rounded up number.
+	       * @example
+	       *
+	       * _.ceil(4.006);
+	       * // => 5
+	       *
+	       * _.ceil(6.004, 2);
+	       * // => 6.01
+	       *
+	       * _.ceil(6040, -2);
+	       * // => 6100
+	       */
 
-	var defaults$2 = defaults.defaults;
-	var block$1 = rules.block,
-	    inline$1 = rules.inline;
-	var repeatString$1 = helpers.repeatString;
-	/**
-	 * smartypants text replacement
-	 */
+	      var ceil = createRound('ceil');
+	      /**
+	       * Divide two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Math
+	       * @param {number} dividend The first number in a division.
+	       * @param {number} divisor The second number in a division.
+	       * @returns {number} Returns the quotient.
+	       * @example
+	       *
+	       * _.divide(6, 4);
+	       * // => 1.5
+	       */
 
-	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
-	 */
+	      var divide = createMathOperation(function (dividend, divisor) {
+	        return dividend / divisor;
+	      }, 1);
+	      /**
+	       * Computes `number` rounded down to `precision`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Math
+	       * @param {number} number The number to round down.
+	       * @param {number} [precision=0] The precision to round down to.
+	       * @returns {number} Returns the rounded down number.
+	       * @example
+	       *
+	       * _.floor(4.006);
+	       * // => 4
+	       *
+	       * _.floor(0.046, 2);
+	       * // => 0.04
+	       *
+	       * _.floor(4060, -2);
+	       * // => 4000
+	       */
 
+	      var floor = createRound('floor');
+	      /**
+	       * Computes the maximum value of `array`. If `array` is empty or falsey,
+	       * `undefined` is returned.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {*} Returns the maximum value.
+	       * @example
+	       *
+	       * _.max([4, 2, 8, 6]);
+	       * // => 8
+	       *
+	       * _.max([]);
+	       * // => undefined
+	       */
 
-	function mangle(text) {
-	  var out = '',
-	      i,
-	      ch;
-	  var l = text.length;
+	      function max(array) {
+	        return array && array.length ? baseExtremum(array, identity, baseGt) : undefined$1;
+	      }
+	      /**
+	       * This method is like `_.max` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the criterion by which
+	       * the value is ranked. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {*} Returns the maximum value.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 1 }, { 'n': 2 }];
+	       *
+	       * _.maxBy(objects, function(o) { return o.n; });
+	       * // => { 'n': 2 }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.maxBy(objects, 'n');
+	       * // => { 'n': 2 }
+	       */
 
-	  for (i = 0; i < l; i++) {
-	    ch = text.charCodeAt(i);
 
-	    if (Math.random() > 0.5) {
-	      ch = 'x' + ch.toString(16);
-	    }
+	      function maxBy(array, iteratee) {
+	        return array && array.length ? baseExtremum(array, getIteratee(iteratee, 2), baseGt) : undefined$1;
+	      }
+	      /**
+	       * Computes the mean of the values in `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {number} Returns the mean.
+	       * @example
+	       *
+	       * _.mean([4, 2, 8, 6]);
+	       * // => 5
+	       */
 
-	    out += '&#' + ch + ';';
-	  }
 
-	  return out;
-	}
-	/**
-	 * Block Lexer
-	 */
+	      function mean(array) {
+	        return baseMean(array, identity);
+	      }
+	      /**
+	       * This method is like `_.mean` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the value to be averaged.
+	       * The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the mean.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+	       *
+	       * _.meanBy(objects, function(o) { return o.n; });
+	       * // => 5
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.meanBy(objects, 'n');
+	       * // => 5
+	       */
 
 
-	var Lexer_1 = /*#__PURE__*/function () {
-	  function Lexer(options) {
-	    _classCallCheck(this, Lexer);
+	      function meanBy(array, iteratee) {
+	        return baseMean(array, getIteratee(iteratee, 2));
+	      }
+	      /**
+	       * Computes the minimum value of `array`. If `array` is empty or falsey,
+	       * `undefined` is returned.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {*} Returns the minimum value.
+	       * @example
+	       *
+	       * _.min([4, 2, 8, 6]);
+	       * // => 2
+	       *
+	       * _.min([]);
+	       * // => undefined
+	       */
 
-	    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;
-	    var rules = {
-	      block: block$1.normal,
-	      inline: inline$1.normal
-	    };
 
-	    if (this.options.pedantic) {
-	      rules.block = block$1.pedantic;
-	      rules.inline = inline$1.pedantic;
-	    } else if (this.options.gfm) {
-	      rules.block = block$1.gfm;
+	      function min(array) {
+	        return array && array.length ? baseExtremum(array, identity, baseLt) : undefined$1;
+	      }
+	      /**
+	       * This method is like `_.min` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the criterion by which
+	       * the value is ranked. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {*} Returns the minimum value.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 1 }, { 'n': 2 }];
+	       *
+	       * _.minBy(objects, function(o) { return o.n; });
+	       * // => { 'n': 1 }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.minBy(objects, 'n');
+	       * // => { 'n': 1 }
+	       */
+
 
-	      if (this.options.breaks) {
-	        rules.inline = inline$1.breaks;
-	      } else {
-	        rules.inline = inline$1.gfm;
+	      function minBy(array, iteratee) {
+	        return array && array.length ? baseExtremum(array, getIteratee(iteratee, 2), baseLt) : undefined$1;
 	      }
-	    }
+	      /**
+	       * Multiply two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Math
+	       * @param {number} multiplier The first number in a multiplication.
+	       * @param {number} multiplicand The second number in a multiplication.
+	       * @returns {number} Returns the product.
+	       * @example
+	       *
+	       * _.multiply(6, 4);
+	       * // => 24
+	       */
 
-	    this.tokenizer.rules = rules;
-	  }
-	  /**
-	   * Expose Rules
-	   */
 
+	      var multiply = createMathOperation(function (multiplier, multiplicand) {
+	        return multiplier * multiplicand;
+	      }, 1);
+	      /**
+	       * Computes `number` rounded to `precision`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Math
+	       * @param {number} number The number to round.
+	       * @param {number} [precision=0] The precision to round to.
+	       * @returns {number} Returns the rounded number.
+	       * @example
+	       *
+	       * _.round(4.006);
+	       * // => 4
+	       *
+	       * _.round(4.006, 2);
+	       * // => 4.01
+	       *
+	       * _.round(4060, -2);
+	       * // => 4100
+	       */
 
-	  _createClass(Lexer, [{
-	    key: "lex",
+	      var round = createRound('round');
+	      /**
+	       * Subtract two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {number} minuend The first number in a subtraction.
+	       * @param {number} subtrahend The second number in a subtraction.
+	       * @returns {number} Returns the difference.
+	       * @example
+	       *
+	       * _.subtract(6, 4);
+	       * // => 2
+	       */
 
-	    /**
-	     * Preprocessing
-	     */
-	    value: 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
-	     */
+	      var subtract = createMathOperation(function (minuend, subtrahend) {
+	        return minuend - subtrahend;
+	      }, 0);
+	      /**
+	       * Computes the sum of the values in `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.4.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {number} Returns the sum.
+	       * @example
+	       *
+	       * _.sum([4, 2, 8, 6]);
+	       * // => 20
+	       */
 
-	  }, {
-	    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;
-	      src = src.replace(/^ +$/gm, '');
-	      var token, i, l, lastToken;
+	      function sum(array) {
+	        return array && array.length ? baseSum(array, identity) : 0;
+	      }
+	      /**
+	       * This method is like `_.sum` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the value to be summed.
+	       * The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the sum.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+	       *
+	       * _.sumBy(objects, function(o) { return o.n; });
+	       * // => 20
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.sumBy(objects, 'n');
+	       * // => 20
+	       */
 
-	      while (src) {
-	        // newline
-	        if (token = this.tokenizer.space(src)) {
-	          src = src.substring(token.raw.length);
 
-	          if (token.type) {
-	            tokens.push(token);
+	      function sumBy(array, iteratee) {
+	        return array && array.length ? baseSum(array, getIteratee(iteratee, 2)) : 0;
+	      }
+	      /*------------------------------------------------------------------------*/
+	      // Add methods that return wrapped values in chain sequences.
+
+
+	      lodash.after = after;
+	      lodash.ary = ary;
+	      lodash.assign = assign;
+	      lodash.assignIn = assignIn;
+	      lodash.assignInWith = assignInWith;
+	      lodash.assignWith = assignWith;
+	      lodash.at = at;
+	      lodash.before = before;
+	      lodash.bind = bind;
+	      lodash.bindAll = bindAll;
+	      lodash.bindKey = bindKey;
+	      lodash.castArray = castArray;
+	      lodash.chain = chain;
+	      lodash.chunk = chunk;
+	      lodash.compact = compact;
+	      lodash.concat = concat;
+	      lodash.cond = cond;
+	      lodash.conforms = conforms;
+	      lodash.constant = constant;
+	      lodash.countBy = countBy;
+	      lodash.create = create;
+	      lodash.curry = curry;
+	      lodash.curryRight = curryRight;
+	      lodash.debounce = debounce;
+	      lodash.defaults = defaults;
+	      lodash.defaultsDeep = defaultsDeep;
+	      lodash.defer = defer;
+	      lodash.delay = delay;
+	      lodash.difference = difference;
+	      lodash.differenceBy = differenceBy;
+	      lodash.differenceWith = differenceWith;
+	      lodash.drop = drop;
+	      lodash.dropRight = dropRight;
+	      lodash.dropRightWhile = dropRightWhile;
+	      lodash.dropWhile = dropWhile;
+	      lodash.fill = fill;
+	      lodash.filter = filter;
+	      lodash.flatMap = flatMap;
+	      lodash.flatMapDeep = flatMapDeep;
+	      lodash.flatMapDepth = flatMapDepth;
+	      lodash.flatten = flatten;
+	      lodash.flattenDeep = flattenDeep;
+	      lodash.flattenDepth = flattenDepth;
+	      lodash.flip = flip;
+	      lodash.flow = flow;
+	      lodash.flowRight = flowRight;
+	      lodash.fromPairs = fromPairs;
+	      lodash.functions = functions;
+	      lodash.functionsIn = functionsIn;
+	      lodash.groupBy = groupBy;
+	      lodash.initial = initial;
+	      lodash.intersection = intersection;
+	      lodash.intersectionBy = intersectionBy;
+	      lodash.intersectionWith = intersectionWith;
+	      lodash.invert = invert;
+	      lodash.invertBy = invertBy;
+	      lodash.invokeMap = invokeMap;
+	      lodash.iteratee = iteratee;
+	      lodash.keyBy = keyBy;
+	      lodash.keys = keys;
+	      lodash.keysIn = keysIn;
+	      lodash.map = map;
+	      lodash.mapKeys = mapKeys;
+	      lodash.mapValues = mapValues;
+	      lodash.matches = matches;
+	      lodash.matchesProperty = matchesProperty;
+	      lodash.memoize = memoize;
+	      lodash.merge = merge;
+	      lodash.mergeWith = mergeWith;
+	      lodash.method = method;
+	      lodash.methodOf = methodOf;
+	      lodash.mixin = mixin;
+	      lodash.negate = negate;
+	      lodash.nthArg = nthArg;
+	      lodash.omit = omit;
+	      lodash.omitBy = omitBy;
+	      lodash.once = once;
+	      lodash.orderBy = orderBy;
+	      lodash.over = over;
+	      lodash.overArgs = overArgs;
+	      lodash.overEvery = overEvery;
+	      lodash.overSome = overSome;
+	      lodash.partial = partial;
+	      lodash.partialRight = partialRight;
+	      lodash.partition = partition;
+	      lodash.pick = pick;
+	      lodash.pickBy = pickBy;
+	      lodash.property = property;
+	      lodash.propertyOf = propertyOf;
+	      lodash.pull = pull;
+	      lodash.pullAll = pullAll;
+	      lodash.pullAllBy = pullAllBy;
+	      lodash.pullAllWith = pullAllWith;
+	      lodash.pullAt = pullAt;
+	      lodash.range = range;
+	      lodash.rangeRight = rangeRight;
+	      lodash.rearg = rearg;
+	      lodash.reject = reject;
+	      lodash.remove = remove;
+	      lodash.rest = rest;
+	      lodash.reverse = reverse;
+	      lodash.sampleSize = sampleSize;
+	      lodash.set = set;
+	      lodash.setWith = setWith;
+	      lodash.shuffle = shuffle;
+	      lodash.slice = slice;
+	      lodash.sortBy = sortBy;
+	      lodash.sortedUniq = sortedUniq;
+	      lodash.sortedUniqBy = sortedUniqBy;
+	      lodash.split = split;
+	      lodash.spread = spread;
+	      lodash.tail = tail;
+	      lodash.take = take;
+	      lodash.takeRight = takeRight;
+	      lodash.takeRightWhile = takeRightWhile;
+	      lodash.takeWhile = takeWhile;
+	      lodash.tap = tap;
+	      lodash.throttle = throttle;
+	      lodash.thru = thru;
+	      lodash.toArray = toArray;
+	      lodash.toPairs = toPairs;
+	      lodash.toPairsIn = toPairsIn;
+	      lodash.toPath = toPath;
+	      lodash.toPlainObject = toPlainObject;
+	      lodash.transform = transform;
+	      lodash.unary = unary;
+	      lodash.union = union;
+	      lodash.unionBy = unionBy;
+	      lodash.unionWith = unionWith;
+	      lodash.uniq = uniq;
+	      lodash.uniqBy = uniqBy;
+	      lodash.uniqWith = uniqWith;
+	      lodash.unset = unset;
+	      lodash.unzip = unzip;
+	      lodash.unzipWith = unzipWith;
+	      lodash.update = update;
+	      lodash.updateWith = updateWith;
+	      lodash.values = values;
+	      lodash.valuesIn = valuesIn;
+	      lodash.without = without;
+	      lodash.words = words;
+	      lodash.wrap = wrap;
+	      lodash.xor = xor;
+	      lodash.xorBy = xorBy;
+	      lodash.xorWith = xorWith;
+	      lodash.zip = zip;
+	      lodash.zipObject = zipObject;
+	      lodash.zipObjectDeep = zipObjectDeep;
+	      lodash.zipWith = zipWith; // Add aliases.
+
+	      lodash.entries = toPairs;
+	      lodash.entriesIn = toPairsIn;
+	      lodash.extend = assignIn;
+	      lodash.extendWith = assignInWith; // Add methods to `lodash.prototype`.
+
+	      mixin(lodash, lodash);
+	      /*------------------------------------------------------------------------*/
+	      // Add methods that return unwrapped values in chain sequences.
+
+	      lodash.add = add;
+	      lodash.attempt = attempt;
+	      lodash.camelCase = camelCase;
+	      lodash.capitalize = capitalize;
+	      lodash.ceil = ceil;
+	      lodash.clamp = clamp;
+	      lodash.clone = clone;
+	      lodash.cloneDeep = cloneDeep;
+	      lodash.cloneDeepWith = cloneDeepWith;
+	      lodash.cloneWith = cloneWith;
+	      lodash.conformsTo = conformsTo;
+	      lodash.deburr = deburr;
+	      lodash.defaultTo = defaultTo;
+	      lodash.divide = divide;
+	      lodash.endsWith = endsWith;
+	      lodash.eq = eq;
+	      lodash.escape = escape;
+	      lodash.escapeRegExp = escapeRegExp;
+	      lodash.every = every;
+	      lodash.find = find;
+	      lodash.findIndex = findIndex;
+	      lodash.findKey = findKey;
+	      lodash.findLast = findLast;
+	      lodash.findLastIndex = findLastIndex;
+	      lodash.findLastKey = findLastKey;
+	      lodash.floor = floor;
+	      lodash.forEach = forEach;
+	      lodash.forEachRight = forEachRight;
+	      lodash.forIn = forIn;
+	      lodash.forInRight = forInRight;
+	      lodash.forOwn = forOwn;
+	      lodash.forOwnRight = forOwnRight;
+	      lodash.get = get;
+	      lodash.gt = gt;
+	      lodash.gte = gte;
+	      lodash.has = has;
+	      lodash.hasIn = hasIn;
+	      lodash.head = head;
+	      lodash.identity = identity;
+	      lodash.includes = includes;
+	      lodash.indexOf = indexOf;
+	      lodash.inRange = inRange;
+	      lodash.invoke = invoke;
+	      lodash.isArguments = isArguments;
+	      lodash.isArray = isArray;
+	      lodash.isArrayBuffer = isArrayBuffer;
+	      lodash.isArrayLike = isArrayLike;
+	      lodash.isArrayLikeObject = isArrayLikeObject;
+	      lodash.isBoolean = isBoolean;
+	      lodash.isBuffer = isBuffer;
+	      lodash.isDate = isDate;
+	      lodash.isElement = isElement;
+	      lodash.isEmpty = isEmpty;
+	      lodash.isEqual = isEqual;
+	      lodash.isEqualWith = isEqualWith;
+	      lodash.isError = isError;
+	      lodash.isFinite = isFinite;
+	      lodash.isFunction = isFunction;
+	      lodash.isInteger = isInteger;
+	      lodash.isLength = isLength;
+	      lodash.isMap = isMap;
+	      lodash.isMatch = isMatch;
+	      lodash.isMatchWith = isMatchWith;
+	      lodash.isNaN = isNaN;
+	      lodash.isNative = isNative;
+	      lodash.isNil = isNil;
+	      lodash.isNull = isNull;
+	      lodash.isNumber = isNumber;
+	      lodash.isObject = isObject;
+	      lodash.isObjectLike = isObjectLike;
+	      lodash.isPlainObject = isPlainObject;
+	      lodash.isRegExp = isRegExp;
+	      lodash.isSafeInteger = isSafeInteger;
+	      lodash.isSet = isSet;
+	      lodash.isString = isString;
+	      lodash.isSymbol = isSymbol;
+	      lodash.isTypedArray = isTypedArray;
+	      lodash.isUndefined = isUndefined;
+	      lodash.isWeakMap = isWeakMap;
+	      lodash.isWeakSet = isWeakSet;
+	      lodash.join = join;
+	      lodash.kebabCase = kebabCase;
+	      lodash.last = last;
+	      lodash.lastIndexOf = lastIndexOf;
+	      lodash.lowerCase = lowerCase;
+	      lodash.lowerFirst = lowerFirst;
+	      lodash.lt = lt;
+	      lodash.lte = lte;
+	      lodash.max = max;
+	      lodash.maxBy = maxBy;
+	      lodash.mean = mean;
+	      lodash.meanBy = meanBy;
+	      lodash.min = min;
+	      lodash.minBy = minBy;
+	      lodash.stubArray = stubArray;
+	      lodash.stubFalse = stubFalse;
+	      lodash.stubObject = stubObject;
+	      lodash.stubString = stubString;
+	      lodash.stubTrue = stubTrue;
+	      lodash.multiply = multiply;
+	      lodash.nth = nth;
+	      lodash.noConflict = noConflict;
+	      lodash.noop = noop;
+	      lodash.now = now;
+	      lodash.pad = pad;
+	      lodash.padEnd = padEnd;
+	      lodash.padStart = padStart;
+	      lodash.parseInt = parseInt;
+	      lodash.random = random;
+	      lodash.reduce = reduce;
+	      lodash.reduceRight = reduceRight;
+	      lodash.repeat = repeat;
+	      lodash.replace = replace;
+	      lodash.result = result;
+	      lodash.round = round;
+	      lodash.runInContext = runInContext;
+	      lodash.sample = sample;
+	      lodash.size = size;
+	      lodash.snakeCase = snakeCase;
+	      lodash.some = some;
+	      lodash.sortedIndex = sortedIndex;
+	      lodash.sortedIndexBy = sortedIndexBy;
+	      lodash.sortedIndexOf = sortedIndexOf;
+	      lodash.sortedLastIndex = sortedLastIndex;
+	      lodash.sortedLastIndexBy = sortedLastIndexBy;
+	      lodash.sortedLastIndexOf = sortedLastIndexOf;
+	      lodash.startCase = startCase;
+	      lodash.startsWith = startsWith;
+	      lodash.subtract = subtract;
+	      lodash.sum = sum;
+	      lodash.sumBy = sumBy;
+	      lodash.template = template;
+	      lodash.times = times;
+	      lodash.toFinite = toFinite;
+	      lodash.toInteger = toInteger;
+	      lodash.toLength = toLength;
+	      lodash.toLower = toLower;
+	      lodash.toNumber = toNumber;
+	      lodash.toSafeInteger = toSafeInteger;
+	      lodash.toString = toString;
+	      lodash.toUpper = toUpper;
+	      lodash.trim = trim;
+	      lodash.trimEnd = trimEnd;
+	      lodash.trimStart = trimStart;
+	      lodash.truncate = truncate;
+	      lodash.unescape = unescape;
+	      lodash.uniqueId = uniqueId;
+	      lodash.upperCase = upperCase;
+	      lodash.upperFirst = upperFirst; // Add aliases.
+
+	      lodash.each = forEach;
+	      lodash.eachRight = forEachRight;
+	      lodash.first = head;
+	      mixin(lodash, function () {
+	        var source = {};
+	        baseForOwn(lodash, function (func, methodName) {
+	          if (!hasOwnProperty.call(lodash.prototype, methodName)) {
+	            source[methodName] = func;
 	          }
+	        });
+	        return source;
+	      }(), {
+	        'chain': false
+	      });
+	      /*------------------------------------------------------------------------*/
 
-	          continue;
-	        } // code
+	      /**
+	       * The semantic version number.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @type {string}
+	       */
 
+	      lodash.VERSION = VERSION; // Assign default placeholders.
 
-	        if (token = this.tokenizer.code(src, tokens)) {
-	          src = src.substring(token.raw.length);
+	      arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function (methodName) {
+	        lodash[methodName].placeholder = lodash;
+	      }); // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
 
-	          if (token.type) {
-	            tokens.push(token);
+	      arrayEach(['drop', 'take'], function (methodName, index) {
+	        LazyWrapper.prototype[methodName] = function (n) {
+	          n = n === undefined$1 ? 1 : nativeMax(toInteger(n), 0);
+	          var result = this.__filtered__ && !index ? new LazyWrapper(this) : this.clone();
+
+	          if (result.__filtered__) {
+	            result.__takeCount__ = nativeMin(n, result.__takeCount__);
 	          } else {
-	            lastToken = tokens[tokens.length - 1];
-	            lastToken.raw += '\n' + token.raw;
-	            lastToken.text += '\n' + token.text;
+	            result.__views__.push({
+	              'size': nativeMin(n, MAX_ARRAY_LENGTH),
+	              'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
+	            });
 	          }
 
-	          continue;
-	        } // fences
-
+	          return result;
+	        };
 
-	        if (token = this.tokenizer.fences(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // heading
+	        LazyWrapper.prototype[methodName + 'Right'] = function (n) {
+	          return this.reverse()[methodName](n).reverse();
+	        };
+	      }); // Add `LazyWrapper` methods that accept an `iteratee` value.
 
+	      arrayEach(['filter', 'map', 'takeWhile'], function (methodName, index) {
+	        var type = index + 1,
+	            isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
 
-	        if (token = this.tokenizer.heading(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // table no leading pipe (gfm)
+	        LazyWrapper.prototype[methodName] = function (iteratee) {
+	          var result = this.clone();
 
+	          result.__iteratees__.push({
+	            'iteratee': getIteratee(iteratee, 3),
+	            'type': type
+	          });
 
-	        if (token = this.tokenizer.nptable(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // hr
+	          result.__filtered__ = result.__filtered__ || isFilter;
+	          return result;
+	        };
+	      }); // Add `LazyWrapper` methods for `_.head` and `_.last`.
 
+	      arrayEach(['head', 'last'], function (methodName, index) {
+	        var takeName = 'take' + (index ? 'Right' : '');
 
-	        if (token = this.tokenizer.hr(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // blockquote
+	        LazyWrapper.prototype[methodName] = function () {
+	          return this[takeName](1).value()[0];
+	        };
+	      }); // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
 
+	      arrayEach(['initial', 'tail'], function (methodName, index) {
+	        var dropName = 'drop' + (index ? '' : 'Right');
 
-	        if (token = this.tokenizer.blockquote(src)) {
-	          src = src.substring(token.raw.length);
-	          token.tokens = this.blockTokens(token.text, [], top);
-	          tokens.push(token);
-	          continue;
-	        } // list
+	        LazyWrapper.prototype[methodName] = function () {
+	          return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
+	        };
+	      });
 
+	      LazyWrapper.prototype.compact = function () {
+	        return this.filter(identity);
+	      };
 
-	        if (token = this.tokenizer.list(src)) {
-	          src = src.substring(token.raw.length);
-	          l = token.items.length;
+	      LazyWrapper.prototype.find = function (predicate) {
+	        return this.filter(predicate).head();
+	      };
 
-	          for (i = 0; i < l; i++) {
-	            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-	          }
+	      LazyWrapper.prototype.findLast = function (predicate) {
+	        return this.reverse().find(predicate);
+	      };
 
-	          tokens.push(token);
-	          continue;
-	        } // html
+	      LazyWrapper.prototype.invokeMap = baseRest(function (path, args) {
+	        if (typeof path == 'function') {
+	          return new LazyWrapper(this);
+	        }
 
+	        return this.map(function (value) {
+	          return baseInvoke(value, path, args);
+	        });
+	      });
 
-	        if (token = this.tokenizer.html(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // def
+	      LazyWrapper.prototype.reject = function (predicate) {
+	        return this.filter(negate(getIteratee(predicate)));
+	      };
 
+	      LazyWrapper.prototype.slice = function (start, end) {
+	        start = toInteger(start);
+	        var result = this;
 
-	        if (top && (token = this.tokenizer.def(src))) {
-	          src = src.substring(token.raw.length);
+	        if (result.__filtered__ && (start > 0 || end < 0)) {
+	          return new LazyWrapper(result);
+	        }
 
-	          if (!this.tokens.links[token.tag]) {
-	            this.tokens.links[token.tag] = {
-	              href: token.href,
-	              title: token.title
-	            };
-	          }
+	        if (start < 0) {
+	          result = result.takeRight(-start);
+	        } else if (start) {
+	          result = result.drop(start);
+	        }
 
-	          continue;
-	        } // table (gfm)
+	        if (end !== undefined$1) {
+	          end = toInteger(end);
+	          result = end < 0 ? result.dropRight(-end) : result.take(end - start);
+	        }
 
+	        return result;
+	      };
 
-	        if (token = this.tokenizer.table(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // lheading
+	      LazyWrapper.prototype.takeRightWhile = function (predicate) {
+	        return this.reverse().takeWhile(predicate).reverse();
+	      };
 
+	      LazyWrapper.prototype.toArray = function () {
+	        return this.take(MAX_ARRAY_LENGTH);
+	      }; // Add `LazyWrapper` methods to `lodash.prototype`.
 
-	        if (token = this.tokenizer.lheading(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // top-level paragraph
 
+	      baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+	        var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
+	            isTaker = /^(?:head|last)$/.test(methodName),
+	            lodashFunc = lodash[isTaker ? 'take' + (methodName == 'last' ? 'Right' : '') : methodName],
+	            retUnwrapped = isTaker || /^find/.test(methodName);
 
-	        if (top && (token = this.tokenizer.paragraph(src))) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // text
+	        if (!lodashFunc) {
+	          return;
+	        }
 
+	        lodash.prototype[methodName] = function () {
+	          var value = this.__wrapped__,
+	              args = isTaker ? [1] : arguments,
+	              isLazy = value instanceof LazyWrapper,
+	              iteratee = args[0],
+	              useLazy = isLazy || isArray(value);
 
-	        if (token = this.tokenizer.text(src, tokens)) {
-	          src = src.substring(token.raw.length);
+	          var interceptor = function interceptor(value) {
+	            var result = lodashFunc.apply(lodash, arrayPush([value], args));
+	            return isTaker && chainAll ? result[0] : result;
+	          };
 
-	          if (token.type) {
-	            tokens.push(token);
-	          } else {
-	            lastToken = tokens[tokens.length - 1];
-	            lastToken.raw += '\n' + token.raw;
-	            lastToken.text += '\n' + token.text;
+	          if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
+	            // Avoid lazy use if the iteratee has a "length" value other than `1`.
+	            isLazy = useLazy = false;
 	          }
 
-	          continue;
-	        }
+	          var chainAll = this.__chain__,
+	              isHybrid = !!this.__actions__.length,
+	              isUnwrapped = retUnwrapped && !chainAll,
+	              onlyLazy = isLazy && !isHybrid;
 
-	        if (src) {
-	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+	          if (!retUnwrapped && useLazy) {
+	            value = onlyLazy ? value : new LazyWrapper(this);
+	            var result = func.apply(value, args);
 
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            break;
-	          } else {
-	            throw new Error(errMsg);
-	          }
-	        }
-	      }
+	            result.__actions__.push({
+	              'func': thru,
+	              'args': [interceptor],
+	              'thisArg': undefined$1
+	            });
 
-	      return tokens;
-	    }
-	  }, {
-	    key: "inline",
-	    value: function inline(tokens) {
-	      var i, j, k, l2, row, token;
-	      var l = tokens.length;
+	            return new LodashWrapper(result, chainAll);
+	          }
 
-	      for (i = 0; i < l; i++) {
-	        token = tokens[i];
+	          if (isUnwrapped && onlyLazy) {
+	            return func.apply(this, args);
+	          }
 
-	        switch (token.type) {
-	          case 'paragraph':
-	          case 'text':
-	          case 'heading':
-	            {
-	              token.tokens = [];
-	              this.inlineTokens(token.text, token.tokens);
-	              break;
-	            }
+	          result = this.thru(interceptor);
+	          return isUnwrapped ? isTaker ? result.value()[0] : result.value() : result;
+	        };
+	      }); // Add `Array` methods to `lodash.prototype`.
 
-	          case 'table':
-	            {
-	              token.tokens = {
-	                header: [],
-	                cells: []
-	              }; // header
+	      arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {
+	        var func = arrayProto[methodName],
+	            chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+	            retUnwrapped = /^(?:pop|shift)$/.test(methodName);
 
-	              l2 = token.header.length;
+	        lodash.prototype[methodName] = function () {
+	          var args = arguments;
 
-	              for (j = 0; j < l2; j++) {
-	                token.tokens.header[j] = [];
-	                this.inlineTokens(token.header[j], token.tokens.header[j]);
-	              } // cells
+	          if (retUnwrapped && !this.__chain__) {
+	            var value = this.value();
+	            return func.apply(isArray(value) ? value : [], args);
+	          }
 
+	          return this[chainName](function (value) {
+	            return func.apply(isArray(value) ? value : [], args);
+	          });
+	        };
+	      }); // Map minified method names to their real names.
 
-	              l2 = token.cells.length;
+	      baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+	        var lodashFunc = lodash[methodName];
 
-	              for (j = 0; j < l2; j++) {
-	                row = token.cells[j];
-	                token.tokens.cells[j] = [];
+	        if (lodashFunc) {
+	          var key = lodashFunc.name + '';
 
-	                for (k = 0; k < row.length; k++) {
-	                  token.tokens.cells[j][k] = [];
-	                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
-	                }
-	              }
+	          if (!hasOwnProperty.call(realNames, key)) {
+	            realNames[key] = [];
+	          }
 
-	              break;
-	            }
+	          realNames[key].push({
+	            'name': methodName,
+	            'func': lodashFunc
+	          });
+	        }
+	      });
+	      realNames[createHybrid(undefined$1, WRAP_BIND_KEY_FLAG).name] = [{
+	        'name': 'wrapper',
+	        'func': undefined$1
+	      }]; // Add methods to `LazyWrapper`.
 
-	          case 'blockquote':
-	            {
-	              this.inline(token.tokens);
-	              break;
-	            }
+	      LazyWrapper.prototype.clone = lazyClone;
+	      LazyWrapper.prototype.reverse = lazyReverse;
+	      LazyWrapper.prototype.value = lazyValue; // Add chain sequence methods to the `lodash` wrapper.
 
-	          case 'list':
-	            {
-	              l2 = token.items.length;
+	      lodash.prototype.at = wrapperAt;
+	      lodash.prototype.chain = wrapperChain;
+	      lodash.prototype.commit = wrapperCommit;
+	      lodash.prototype.next = wrapperNext;
+	      lodash.prototype.plant = wrapperPlant;
+	      lodash.prototype.reverse = wrapperReverse;
+	      lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue; // Add lazy aliases.
 
-	              for (j = 0; j < l2; j++) {
-	                this.inline(token.items[j].tokens);
-	              }
+	      lodash.prototype.first = lodash.prototype.head;
 
-	              break;
-	            }
-	        }
+	      if (symIterator) {
+	        lodash.prototype[symIterator] = wrapperToIterator;
 	      }
 
-	      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 prevChar = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : '';
-	      var token; // String with links masked to avoid interference with em and strong
-
-	      var maskedSrc = src;
-	      var match; // Mask out reflinks
-
-	      if (this.tokens.links) {
-	        var links = Object.keys(this.tokens.links);
+	      return lodash;
+	    };
+	    /*--------------------------------------------------------------------------*/
+	    // Export lodash.
 
-	        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$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
-	            }
-	          }
-	        }
-	      } // Mask out other blocks
 
+	    var _ = runInContext(); // Some AMD build optimizers, like r.js, check for condition patterns like:
 
-	      while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-	        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
-	      }
 
-	      while (src) {
-	        // escape
-	        if (token = this.tokenizer.escape(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // tag
+	    if (freeModule) {
+	      // Export for Node.js.
+	      (freeModule.exports = _)._ = _; // Export for CommonJS support.
 
+	      freeExports._ = _;
+	    } else {
+	      // Export to the global object.
+	      root._ = _;
+	    }
+	  }).call(commonjsGlobal);
+	})(lodash, lodash.exports);
 
-	        if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-	          src = src.substring(token.raw.length);
-	          inLink = token.inLink;
-	          inRawBlock = token.inRawBlock;
-	          tokens.push(token);
-	          continue;
-	        } // link
+	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+	  discardTags = discardTags || {};
+	  var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
+	  var _conflicts = [];
 
-	        if (token = this.tokenizer.link(src)) {
-	          src = src.substring(token.raw.length);
+	  function user(d) {
+	    return typeof formatUser === 'function' ? formatUser(d) : lodash.exports.escape(d);
+	  }
 
-	          if (token.type === 'link') {
-	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-	          }
+	  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;
+	    }
 
-	          tokens.push(token);
-	          continue;
-	        } // reflink, nolink
+	    if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+	      return target;
+	    }
 
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        loc: remote.loc
+	      });
+	    }
 
-	        if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-	          src = src.substring(token.raw.length);
+	    _conflicts.push(_t.html('merge_remote_changes.conflict.location', {
+	      user: {
+	        html: user(remote.user)
+	      }
+	    }));
 
-	          if (token.type === 'link') {
-	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-	          }
+	    return target;
+	  }
 
-	          tokens.push(token);
-	          continue;
-	        } // strong
+	  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
+	      });
+	    }
 
-	        if (token = this.tokenizer.strong(src, maskedSrc, prevChar)) {
-	          src = src.substring(token.raw.length);
-	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	          tokens.push(token);
-	          continue;
-	        } // em
+	    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 (token = this.tokenizer.em(src, maskedSrc, prevChar)) {
-	          src = src.substring(token.raw.length);
-	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	          tokens.push(token);
-	          continue;
-	        } // code
+	      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.html('merge_remote_changes.conflict.nodelist', {
+	            user: {
+	              html: user(remote.user)
+	            }
+	          }));
 
-	        if (token = this.tokenizer.codespan(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // br
+	          break;
+	        }
+	      }
+	    }
 
+	    return _conflicts.length === ccount ? target.update({
+	      nodes: nodes
+	    }) : target;
+	  }
 
-	        if (token = this.tokenizer.br(src)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // del (gfm)
+	  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;
 
-	        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
+	    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);
+	        }
 
-	        if (token = this.tokenizer.autolink(src, mangle)) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // url (gfm)
+	        continue;
+	      } // restore used childNodes..
 
 
-	        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-	          src = src.substring(token.raw.length);
-	          tokens.push(token);
-	          continue;
-	        } // text
+	      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 (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-	          src = src.substring(token.raw.length);
-	          prevChar = token.raw.slice(-1);
-	          tokens.push(token);
-	          continue;
+	        if (remote) {
+	          target = target.update({
+	            version: remote.version
+	          });
 	        }
 
-	        if (src) {
-	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+	        updates.replacements.push(target);
+	      } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+	        target = osmEntity(local, {
+	          version: remote.version
+	        });
 
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            break;
-	          } else {
-	            throw new Error(errMsg);
-	          }
+	        if (remote.visible) {
+	          target = mergeLocation(remote, target);
+	        } else {
+	          _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+	            user: {
+	              html: user(remote.user)
+	            }
+	          }));
 	        }
-	      }
 
-	      return tokens;
+	        if (_conflicts.length !== ccount) break;
+	        updates.replacements.push(target);
+	      }
 	    }
-	  }], [{
-	    key: "lex",
 
-	    /**
-	     * Static Lex Method
-	     */
-	    value: function lex(src, options) {
-	      var lexer = new Lexer(options);
-	      return lexer.lex(src);
-	    }
-	    /**
-	     * Static Lex Inline Method
-	     */
+	    return targetWay;
+	  }
 
-	  }, {
-	    key: "lexInline",
-	    value: function lexInline(src, options) {
-	      var lexer = new Lexer(options);
-	      return lexer.inlineTokens(src);
-	    }
-	  }, {
-	    key: "rules",
-	    get: function get() {
-	      return {
-	        block: block$1,
-	        inline: inline$1
-	      };
+	  function updateChildren(updates, graph) {
+	    for (var i = 0; i < updates.replacements.length; i++) {
+	      graph = graph.replace(updates.replacements[i]);
 	    }
-	  }]);
-
-	  return Lexer;
-	}();
-
-	var defaults$3 = defaults.defaults;
-	var cleanUrl$1 = helpers.cleanUrl,
-	    escape$2 = helpers.escape;
-	/**
-	 * Renderer
-	 */
 
-	var Renderer_1 = /*#__PURE__*/function () {
-	  function Renderer(options) {
-	    _classCallCheck(this, Renderer);
+	    if (updates.removeIds.length) {
+	      graph = actionDeleteMultiple(updates.removeIds)(graph);
+	    }
 
-	    this.options = options || defaults$3;
+	    return graph;
 	  }
 
-	  _createClass(Renderer, [{
-	    key: "code",
-	    value: function code(_code, infostring, escaped) {
-	      var lang = (infostring || '').match(/\S*/)[0];
+	  function mergeMembers(remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+	      return target;
+	    }
 
-	      if (this.options.highlight) {
-	        var out = this.options.highlight(_code, lang);
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        members: remote.members
+	      });
+	    }
 
-	        if (out != null && out !== _code) {
-	          escaped = true;
-	          _code = out;
-	        }
+	    _conflicts.push(_t.html('merge_remote_changes.conflict.memberlist', {
+	      user: {
+	        html: user(remote.user)
 	      }
+	    }));
 
-	      if (!lang) {
-	        return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
-	      }
+	    return target;
+	  }
 
-	      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';
+	  function mergeTags(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+	      return target;
 	    }
-	  }, {
-	    key: "html",
-	    value: function html(_html) {
-	      return _html;
+
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        tags: remote.tags
+	      });
 	    }
-	  }, {
-	    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
 
+	    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
 
-	      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
+	    var changed = false;
 
-	  }, {
-	    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$1(this.options.sanitize, this.options.baseUrl, href);
+	    for (var i = 0; i < keys.length; i++) {
+	      var k = keys[i];
 
-	      if (href === null) {
-	        return text;
+	      if (o[k] !== b[k] && a[k] !== b[k]) {
+	        // changed remotely..
+	        if (o[k] !== a[k]) {
+	          // changed locally..
+	          _conflicts.push(_t.html('merge_remote_changes.conflict.tags', {
+	            tag: k,
+	            local: a[k],
+	            remote: b[k],
+	            user: {
+	              html: user(remote.user)
+	            }
+	          }));
+	        } else {
+	          // unchanged locally, accept remote change..
+	          if (b.hasOwnProperty(k)) {
+	            tags[k] = b[k];
+	          } else {
+	            delete tags[k];
+	          }
+
+	          changed = true;
+	        }
 	      }
+	    }
 
-	      var out = '<a href="' + escape$2(href) + '"';
+	    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`
+	  //
 
-	      if (title) {
-	        out += ' title="' + title + '"';
-	      }
 
-	      out += '>' + text + '</a>';
-	      return out;
-	    }
-	  }, {
-	    key: "image",
-	    value: function image(href, title, text) {
-	      href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
+	  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 (href === null) {
-	        return text;
-	      }
+	    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 out = '<img src="' + href + '" alt="' + text + '"';
+	        return graph.replace(target);
+	      } else {
+	        _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+	          user: {
+	            html: user(remote.user)
+	          }
+	        }));
 
-	      if (title) {
-	        out += ' title="' + title + '"';
+	        return graph; // do nothing
 	      }
+	    } // merge
 
-	      out += this.options.xhtml ? '/>' : '>';
-	      return out;
-	    }
-	  }, {
-	    key: "text",
-	    value: function text(_text) {
-	      return _text;
-	    }
-	  }]);
 
-	  return Renderer;
-	}();
+	    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);
+	    }
 
-	/**
-	 * TextRenderer
-	 * returns only the textual part of the token
-	 */
-	var TextRenderer_1 = /*#__PURE__*/function () {
-	  function TextRenderer() {
-	    _classCallCheck(this, TextRenderer);
-	  }
+	    target = mergeTags(base, remote, target);
 
-	  _createClass(TextRenderer, [{
-	    key: "strong",
-	    // no need for block level renderers
-	    value: 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 '';
+	    if (!_conflicts.length) {
+	      graph = updateChildren(updates, graph).replace(target);
 	    }
-	  }]);
 
-	  return TextRenderer;
-	}();
+	    return graph;
+	  };
 
-	/**
-	 * Slugger generates header id
-	 */
-	var Slugger_1 = /*#__PURE__*/function () {
-	  function Slugger() {
-	    _classCallCheck(this, Slugger);
+	  action.withOption = function (opt) {
+	    _option = opt;
+	    return action;
+	  };
 
-	    this.seen = {};
-	  }
+	  action.conflicts = function () {
+	    return _conflicts;
+	  };
 
-	  _createClass(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
-	     */
+	  return action;
+	}
 
-	  }, {
-	    key: "getNextSafeSlug",
-	    value: function getNextSafeSlug(originalSlug, isDryRun) {
-	      var slug = originalSlug;
-	      var occurenceAccumulator = 0;
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-	      if (this.seen.hasOwnProperty(slug)) {
-	        occurenceAccumulator = this.seen[originalSlug];
+	function actionMove(moveIDs, tryDelta, projection, cache) {
+	  var _delta = tryDelta;
 
-	        do {
-	          occurenceAccumulator++;
-	          slug = originalSlug + '-' + occurenceAccumulator;
-	        } while (this.seen.hasOwnProperty(slug));
-	      }
+	  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..
 
-	      if (!isDryRun) {
-	        this.seen[originalSlug] = occurenceAccumulator;
-	        this.seen[slug] = 0;
-	      }
+	      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..
 
-	      return slug;
+	      var parentsMoving = parents.every(function (way) {
+	        return cache.moving[way.id];
+	      });
+	      if (!parentsMoving) delete cache.moving[nodeID];
+	      return parentsMoving;
 	    }
-	    /**
-	     * Convert string to unique id
-	     * @param {object} options
-	     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
-	     */
 
-	  }, {
-	    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);
-	    }
-	  }]);
+	    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;
 
-	  return Slugger;
-	}();
+	        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;
+	          }));
+	        }
+	      }
+	    }
 
-	var defaults$4 = defaults.defaults;
-	var unescape$2 = helpers.unescape;
-	/**
-	 * Parsing & Compiling
-	 */
+	    function cacheIntersections(ids) {
+	      function isEndpoint(way, id) {
+	        return !way.isClosed() && !!way.affix(id);
+	      }
 
-	var Parser_1 = /*#__PURE__*/function () {
-	  function Parser(options) {
-	    _classCallCheck(this, Parser);
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-	    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
-	   */
+	        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;
 
-	  _createClass(Parser, [{
-	    key: "parse",
+	          for (var k = 0; k < parents.length; k++) {
+	            var way = parents[k];
 
-	    /**
-	     * Parse Loop
-	     */
-	    value: 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;
+	            if (!cache.moving[way.id]) {
+	              unmoved = way;
+	              break;
+	            }
+	          }
 
-	      for (i = 0; i < l; i++) {
-	        token = tokens[i];
+	          if (!unmoved) continue; // exclude ways that are overly connected..
 
-	        switch (token.type) {
-	          case 'space':
-	            {
-	              continue;
-	            }
+	          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)
+	          });
+	        }
+	      }
+	    }
 
-	          case 'hr':
-	            {
-	              out += this.renderer.hr();
-	              continue;
-	            }
+	    if (!cache) {
+	      cache = {};
+	    }
 
-	          case 'heading':
-	            {
-	              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$2(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
-	              continue;
-	            }
+	    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
+	  //
+	  //
 
-	          case 'code':
-	            {
-	              out += this.renderer.code(token.text, token.lang, token.escaped);
-	              continue;
-	            }
 
-	          case 'table':
-	            {
-	              header = ''; // header
+	  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;
 
-	              cell = '';
-	              l2 = token.header.length;
+	    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;
+	    }
 
-	              for (j = 0; j < l2; j++) {
-	                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
-	                  header: true,
-	                  align: token.align[j]
-	                });
-	              }
+	    var prev = graph.hasEntity(way.nodes[prevIndex]);
+	    var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-	              header += this.renderer.tablerow(cell);
-	              body = '';
-	              l2 = token.cells.length;
+	    if (!prev || !next) return graph;
+	    var key = wayId + '_' + nodeId;
+	    var orig = cache.replacedVertex[key];
 
-	              for (j = 0; j < l2; j++) {
-	                row = token.tokens.cells[j];
-	                cell = '';
-	                l3 = row.length;
+	    if (!orig) {
+	      orig = osmNode();
+	      cache.replacedVertex[key] = orig;
+	      cache.startLoc[orig.id] = cache.startLoc[nodeId];
+	    }
 
-	                for (k = 0; k < l3; k++) {
-	                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
-	                    header: false,
-	                    align: token.align[k]
-	                  });
-	                }
+	    var start, end;
 
-	                body += this.renderer.tablerow(cell);
-	              }
+	    if (delta) {
+	      start = projection(cache.startLoc[nodeId]);
+	      end = projection.invert(geoVecAdd(start, delta));
+	    } else {
+	      end = cache.startLoc[nodeId];
+	    }
 
-	              out += this.renderer.table(header, body);
-	              continue;
-	            }
+	    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..
 
-	          case 'blockquote':
-	            {
-	              body = this.parse(token.tokens);
-	              out += this.renderer.blockquote(body);
-	              continue;
-	            }
+	    if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-	          case 'list':
-	            {
-	              ordered = token.ordered;
-	              start = token.start;
-	              loose = token.loose;
-	              l2 = token.items.length;
-	              body = '';
+	    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?
 
-	              for (j = 0; j < l2; j++) {
-	                item = token.items[j];
-	                checked = item.checked;
-	                task = item.task;
-	                itemBody = '';
+	    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.
 
-	                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;
+	  function removeDuplicateVertices(wayId, graph) {
+	    var way = graph.entity(wayId);
+	    var epsilon = 1e-6;
+	    var prev, curr;
 
-	                      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;
-	                  }
-	                }
+	    function isInteresting(node, graph) {
+	      return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	    }
 
-	                itemBody += this.parse(item.tokens, loose);
-	                body += this.renderer.listitem(itemBody, task, checked);
-	              }
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      curr = graph.entity(way.nodes[i]);
 
-	              out += this.renderer.list(body, ordered, start);
-	              continue;
-	            }
+	      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);
+	        }
+	      }
 
-	          case 'html':
-	            {
-	              // TODO parse inline content if parameter markdown=1
-	              out += this.renderer.html(token.text);
-	              continue;
-	            }
+	      prev = curr;
+	    }
 
-	          case 'paragraph':
-	            {
-	              out += this.renderer.paragraph(this.parseInline(token.tokens));
-	              continue;
-	            }
+	    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
+	  //
 
-	          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);
-	              }
+	  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.
 
-	              out += top ? this.renderer.paragraph(body) : body;
-	              continue;
-	            }
+	    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)..
 
-	          default:
-	            {
-	              var errMsg = 'Token with "' + token.type + '" type was not found.';
+	    if (!isEP1 && !isEP2) {
+	      var epsilon = 1e-6,
+	          maxIter = 10;
 
-	              if (this.options.silent) {
-	                console.error(errMsg);
-	                return;
-	              } else {
-	                throw new Error(errMsg);
-	              }
-	            }
-	        }
+	      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;
 	      }
-
-	      return out;
+	    } else if (!isEP1) {
+	      loc = edge1.loc;
+	    } else {
+	      loc = edge2.loc;
 	    }
-	    /**
-	     * 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;
-	            }
+	    graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-	          case 'html':
-	            {
-	              out += renderer.html(token.text);
-	              break;
-	            }
+	    if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+	      way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+	      graph = graph.replace(way1);
+	    }
 
-	          case 'link':
-	            {
-	              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-	              break;
-	            }
+	    if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+	      way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+	      graph = graph.replace(way2);
+	    }
 
-	          case 'image':
-	            {
-	              out += renderer.image(token.href, token.title, token.text);
-	              break;
-	            }
+	    return graph;
+	  }
 
-	          case 'strong':
-	            {
-	              out += renderer.strong(this.parseInline(token.tokens, renderer));
-	              break;
-	            }
+	  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);
+	    }
 
-	          case 'em':
-	            {
-	              out += renderer.em(this.parseInline(token.tokens, renderer));
-	              break;
-	            }
+	    return graph;
+	  } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
-	          case 'codespan':
-	            {
-	              out += renderer.codespan(token.text);
-	              break;
-	            }
 
-	          case 'br':
-	            {
-	              out += renderer.br();
-	              break;
-	            }
+	  function limitDelta(graph) {
+	    function moveNode(loc) {
+	      return geoVecAdd(projection(loc), _delta);
+	    }
 
-	          case 'del':
-	            {
-	              out += renderer.del(this.parseInline(token.tokens, renderer));
-	              break;
-	            }
+	    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..
 
-	          case 'text':
-	            {
-	              out += renderer.text(token.text);
-	              break;
-	            }
+	      if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-	          default:
-	            {
-	              var errMsg = 'Token with "' + token.type + '" type was not found.';
+	      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);
 
-	              if (this.options.silent) {
-	                console.error(errMsg);
-	                return;
-	              } else {
-	                throw new Error(errMsg);
-	              }
-	            }
-	        }
+	      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 out;
+	  var action = function action(graph) {
+	    if (_delta[0] === 0 && _delta[1] === 0) return graph;
+	    setupCache(graph);
+
+	    if (cache.intersections.length) {
+	      limitDelta(graph);
 	    }
-	  }], [{
-	    key: "parse",
-	    value: function parse(tokens, options) {
-	      var parser = new Parser(options);
-	      return parser.parse(tokens);
+
+	    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)));
 	    }
-	    /**
-	     * Static Parse Inline Method
-	     */
 
-	  }, {
-	    key: "parseInline",
-	    value: function parseInline(tokens, options) {
-	      var parser = new Parser(options);
-	      return parser.parseInline(tokens);
+	    if (cache.intersections.length) {
+	      graph = cleanupIntersections(graph);
 	    }
-	  }]);
 
-	  return Parser;
-	}();
+	    return graph;
+	  };
 
-	var merge$3 = helpers.merge,
-	    checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation,
-	    escape$3 = helpers.escape;
-	var getDefaults = defaults.getDefaults,
-	    changeDefaults = defaults.changeDefaults,
-	    defaults$5 = defaults.defaults;
-	/**
-	 * Marked
-	 */
+	  action.delta = function () {
+	    return _delta;
+	  };
 
-	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 action;
+	}
 
-	  if (typeof src !== 'string') {
-	    throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
-	  }
+	function actionMoveMember(relationId, fromIndex, toIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+	  };
+	}
 
-	  if (typeof opt === 'function') {
-	    callback = opt;
-	    opt = null;
-	  }
+	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)));
+	  };
 
-	  opt = merge$3({}, marked.defaults, opt || {});
-	  checkSanitizeDeprecation$1(opt);
+	  action.transitionable = true;
+	  return action;
+	}
 
-	  if (callback) {
-	    var highlight = opt.highlight;
-	    var tokens;
+	function actionNoop() {
+	  return function (graph) {
+	    return graph;
+	  };
+	}
 
-	    try {
-	      tokens = Lexer_1.lex(src, opt);
-	    } catch (e) {
-	      return callback(e);
-	    }
+	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 done = function done(err) {
-	      var out;
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	      if (!err) {
-	        try {
-	          out = Parser_1.parse(tokens, opt);
-	        } catch (e) {
-	          err = e;
-	        }
-	      }
+	  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
 
-	      opt.highlight = highlight;
-	      return err ? callback(err) : callback(null, out);
-	    };
+	    if (way.tags.nonsquare) {
+	      var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
-	    if (!highlight || highlight.length < 3) {
-	      return done();
+	      delete tags.nonsquare;
+	      way = way.update({
+	        tags: tags
+	      });
 	    }
 
-	    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);
-	            }
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	            if (code != null && code !== token.text) {
-	              token.text = code;
-	              token.escaped = true;
-	            }
+	    if (isClosed) nodes.pop();
 
-	            pending--;
+	    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
 
-	            if (pending === 0) {
-	              done();
-	            }
-	          });
-	        }, 0);
+
+	    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;
+	        }
 	      }
-	    });
 
-	    if (pending === 0) {
-	      done();
-	    }
+	      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
+
+	      for (i = 0; i < points.length; i++) {
+	        point = points[i];
+	        var dotp = 0;
 
-	    return;
-	  }
+	        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));
+	        }
 
-	  try {
-	    var _tokens = Lexer_1.lex(src, opt);
+	        if (dotp > upperThreshold) {
+	          straights.push(point);
+	        } else {
+	          simplified.push(point);
+	        }
+	      } // Orthogonalize the simplified shape
 
-	    if (opt.walkTokens) {
-	      marked.walkTokens(_tokens, opt.walkTokens);
-	    }
 
-	    return Parser_1.parse(_tokens, opt);
-	  } catch (e) {
-	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+	      var bestPoints = clonePoints(simplified);
+	      var originalPoints = clonePoints(simplified);
+	      score = Infinity;
 
-	    if (opt.silent) {
-	      return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
-	    }
+	      for (i = 0; i < 1000; i++) {
+	        motions = simplified.map(calcMotion);
 
-	    throw e;
-	  }
-	}
-	/**
-	 * Options
-	 */
+	        for (j = 0; j < motions.length; j++) {
+	          simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
+	        }
 
+	        var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-	marked.options = marked.setOptions = function (opt) {
-	  merge$3(marked.defaults, opt);
-	  changeDefaults(marked.defaults);
-	  return marked;
-	};
+	        if (newScore < score) {
+	          bestPoints = clonePoints(simplified);
+	          score = newScore;
+	        }
 
-	marked.getDefaults = getDefaults;
-	marked.defaults = defaults$5;
-	/**
-	 * Use Extension
-	 */
+	        if (score < epsilon) {
+	          break;
+	        }
+	      }
 
-	marked.use = function (extension) {
-	  var opts = merge$3({}, extension);
+	      var bestCoords = bestPoints.map(function (p) {
+	        return p.coord;
+	      });
+	      if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
-	  if (extension.renderer) {
-	    (function () {
-	      var renderer = marked.defaults.renderer || new Renderer_1();
+	      for (i = 0; i < bestPoints.length; i++) {
+	        point = bestPoints[i];
 
-	      var _loop = function _loop(prop) {
-	        var prevRenderer = renderer[prop];
+	        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
 
-	        renderer[prop] = function () {
-	          for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
-	            args[_key] = arguments[_key];
-	          }
 
-	          var ret = extension.renderer[prop].apply(renderer, args);
+	      for (i = 0; i < straights.length; i++) {
+	        point = straights[i];
+	        if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-	          if (ret === false) {
-	            ret = prevRenderer.apply(renderer, args);
-	          }
+	        node = graph.entity(point.id);
 
-	          return ret;
-	        };
-	      };
+	        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);
 
-	      for (var prop in extension.renderer) {
-	        _loop(prop);
+	          if (choice) {
+	            loc = projection.invert(choice.target);
+	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	          }
+	        }
 	      }
+	    }
 
-	      opts.renderer = renderer;
-	    })();
-	  }
+	    return graph;
 
-	  if (extension.tokenizer) {
-	    (function () {
-	      var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
+	    function clonePoints(array) {
+	      return array.map(function (p) {
+	        return {
+	          id: p.id,
+	          coord: [p.coord[0], p.coord[1]]
+	        };
+	      });
+	    }
 
-	      var _loop2 = function _loop2(prop) {
-	        var prevTokenizer = tokenizer[prop];
+	    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)
 
-	        tokenizer[prop] = function () {
-	          for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
-	            args[_key2] = arguments[_key2];
-	          }
+	      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);
 
-	          var ret = extension.tokenizer[prop].apply(tokenizer, args);
+	      if (val < lowerThreshold) {
+	        // nearly orthogonal
+	        corner.i = i;
+	        corner.dotp = val;
+	        var vec = geoVecNormalize(geoVecAdd(p, q));
+	        return geoVecScale(vec, 0.1 * dotp * scale);
+	      }
 
-	          if (ret === false) {
-	            ret = prevTokenizer.apply(tokenizer, args);
-	          }
+	      return [0, 0]; // do nothing
+	    }
+	  }; // if we are only orthogonalizing one vertex,
+	  // get that vertex and the previous and next
 
-	          return ret;
-	        };
-	      };
 
-	      for (var prop in extension.tokenizer) {
-	        _loop2(prop);
+	  function nodeSubset(nodes, vertexID, isClosed) {
+	    var first = isClosed ? 0 : 1;
+	    var last = isClosed ? nodes.length : nodes.length - 1;
+
+	    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]];
 	      }
+	    }
 
-	      opts.tokenizer = tokenizer;
-	    })();
+	    return [];
 	  }
 
-	  if (extension.walkTokens) {
-	    var walkTokens = marked.defaults.walkTokens;
+	  action.disabled = function (graph) {
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	    opts.walkTokens = function (token) {
-	      extension.walkTokens(token);
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	      if (walkTokens) {
-	        walkTokens(token);
-	      }
-	    };
-	  }
+	    if (isClosed) nodes.pop();
+	    var allowStraightAngles = false;
 
-	  marked.setOptions(opts);
-	};
-	/**
-	 * Run callback for every token
-	 */
+	    if (vertexID !== undefined) {
+	      allowStraightAngles = true;
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return 'end_vertex';
+	    }
 
+	    var coords = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
-	marked.walkTokens = function (tokens, callback) {
-	  var _iterator = _createForOfIteratorHelper(tokens),
-	      _step;
+	    if (score === null) {
+	      return 'not_squarish';
+	    } else if (score === 0) {
+	      return 'square_enough';
+	    } else {
+	      return false;
+	    }
+	  };
 
-	  try {
-	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
-	      var token = _step.value;
-	      callback(token);
+	  action.transitionable = true;
+	  return action;
+	}
 
-	      switch (token.type) {
-	        case 'table':
-	          {
-	            var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
-	                _step2;
+	//
+	// `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.
+	//
 
-	            try {
-	              for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
-	                var cell = _step2.value;
-	                marked.walkTokens(cell, callback);
-	              }
-	            } catch (err) {
-	              _iterator2.e(err);
-	            } finally {
-	              _iterator2.f();
-	            }
+	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'
+	    });
 
-	            var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
-	                _step3;
+	    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'
+	        });
+	      });
+	    }
 
-	            try {
-	              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
-	                var row = _step3.value;
+	    members.push({
+	      id: toWay.id,
+	      type: 'way',
+	      role: 'to'
+	    });
+	    return graph.replace(osmRelation({
+	      id: restrictionID,
+	      tags: {
+	        type: 'restriction',
+	        restriction: restrictionType
+	      },
+	      members: members
+	    }));
+	  };
+	}
 
-	                var _iterator4 = _createForOfIteratorHelper(row),
-	                    _step4;
+	function actionRevert(id) {
+	  var action = function action(graph) {
+	    var entity = graph.hasEntity(id),
+	        base = graph.base().entities[id];
 
-	                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();
-	            }
+	    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);
 
-	            break;
+	          if (parent.isDegenerate()) {
+	            graph = actionDeleteWay(parent.id)(graph);
 	          }
+	        });
+	      }
 
-	        case 'list':
-	          {
-	            marked.walkTokens(token.items, callback);
-	            break;
-	          }
+	      graph.parentRelations(entity).forEach(function (parent) {
+	        parent = parent.removeMembersWithID(id);
+	        graph = graph.replace(parent);
 
-	        default:
-	          {
-	            if (token.tokens) {
-	              marked.walkTokens(token.tokens, callback);
-	            }
-	          }
-	      }
+	        if (parent.isDegenerate()) {
+	          graph = actionDeleteRelation(parent.id)(graph);
+	        }
+	      });
 	    }
-	  } catch (err) {
-	    _iterator.e(err);
-	  } finally {
-	    _iterator.f();
-	  }
-	};
-	/**
-	 * Parse Inline
-	 */
 
+	    return graph.revert(id);
+	  };
 
-	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');
-	  }
+	  return action;
+	}
 
-	  if (typeof src !== 'string') {
-	    throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
-	  }
+	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)));
+	      });
+	    });
+	  };
 
-	  opt = merge$3({}, marked.defaults, opt || {});
-	  checkSanitizeDeprecation$1(opt);
+	  return action;
+	}
 
-	  try {
-	    var tokens = Lexer_1.lexInline(src, opt);
+	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)));
+	      });
+	    });
+	  };
+	}
 
-	    if (opt.walkTokens) {
-	      marked.walkTokens(tokens, opt.walkTokens);
-	    }
+	/* Align nodes along their common axis */
 
-	    return Parser_1.parseInline(tokens, opt);
-	  } catch (e) {
-	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+	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
 
-	    if (opt.silent) {
-	      return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
-	    }
 
-	    throw e;
-	  }
-	};
-	/**
-	 * Expose
-	 */
+	  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];
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
 
-	marked.Parser = Parser_1;
-	marked.parser = Parser_1.parse;
-	marked.Renderer = Renderer_1;
-	marked.TextRenderer = TextRenderer_1;
-	marked.Lexer = Lexer_1;
-	marked.lexer = Lexer_1.lex;
-	marked.Tokenizer = Tokenizer_1;
-	marked.Slugger = Slugger_1;
-	marked.parse = marked;
-	var marked_1 = marked;
+	    if (isLong) {
+	      return [p1, q1];
+	    }
 
-	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: []
-	}; // This gets reassigned if reset
+	    return [p2, q2];
+	  }
 
-	var _cache$2;
+	  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
 
-	function abortRequest$2(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	    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)));
+	    }
 
-	function abortUnwantedRequests$2(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) {
-	      return k === tile.id;
+	    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;
 
-	    if (!wanted) {
-	      abortRequest$2(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
+	    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;
+	      }
 	    }
-	  });
-	}
 
-	function encodeIssueRtree$2(d) {
-	  return {
-	    minX: d.loc[0],
-	    minY: d.loc[1],
-	    maxX: d.loc[0],
-	    maxY: d.loc[1],
-	    data: d
+	    if (maxDistance < 0.0001) {
+	      return 'straight_enough';
+	    }
 	  };
-	} // Replace or remove QAItem from rtree
 
+	  action.transitionable = true;
+	  return action;
+	}
 
-	function updateRtree$2(item, replace) {
-	  _cache$2.rtree.remove(item, function (a, b) {
-	    return a.data.id === b.data.id;
-	  });
+	/*
+	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+	 */
 
-	  if (replace) {
-	    _cache$2.rtree.insert(item);
-	  }
-	} // Issues shouldn't obscure each other
+	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 preventCoincident$1(loc) {
-	  var coincident = false;
+	  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';
+	    });
 
-	  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);
+	    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"]
 
-	  return loc;
-	}
 
-	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]);
-	      }, []);
+	    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
 
-	    if (!_cache$2) {
-	      this.reset();
-	    }
+	    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
 
-	    this.event = utilRebind(this, dispatch$3, 'on');
-	  },
-	  reset: function reset() {
-	    var _strings = {};
-	    var _colors = {};
+	    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
 
-	    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;
-	    }
+	    while (remainingWays.length) {
+	      nextWay = getNextWay(currNode, remainingWays);
+	      remainingWays = utilArrayDifference(remainingWays, [nextWay]);
 
-	    _cache$2 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush(),
-	      strings: _strings,
-	      colors: _colors
-	    };
-	  },
-	  loadIssues: function loadIssues(projection) {
-	    var _this = this;
+	      if (nextWay[0] !== currNode) {
+	        nextWay.reverse();
+	      }
 
-	    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
+	      nodes = nodes.concat(nextWay);
+	      currNode = nodes[nodes.length - 1];
+	    } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
 
-	    var tiles = tiler$2.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    abortUnwantedRequests$2(_cache$2, tiles); // issue new requests..
+	    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);
+	    }
 
-	    tiles.forEach(function (tile) {
-	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+	    return nodes.map(function (n) {
+	      return graph.entity(n);
+	    });
+	  }
 
-	      var _tile$xyz = _slicedToArray(tile.xyz, 3),
-	          x = _tile$xyz[0],
-	          y = _tile$xyz[1],
-	          z = _tile$xyz[2];
+	  function shouldKeepNode(node, graph) {
+	    return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	  }
 
-	      var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + 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;
+	  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;
 
-	        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) */
+	    for (i = 1; i < points.length - 1; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
 
-	            var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+	      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);
+	        }
+	      }
+	    }
 
-	            if (itemType in _osmoseData.icons) {
-	              var loc = issue.geometry.coordinates; // lon, lat
+	    for (i = 0; i < toDelete.length; i++) {
+	      graph = actionDeleteNode(toDelete[i].id)(graph);
+	    }
 
-	              loc = preventCoincident$1(loc);
-	              var d = new QAItem(loc, _this, itemType, id, {
-	                item: item
-	              }); // Setting elems here prevents UI detail requests
+	    return graph;
+	  };
 
-	              if (item === 8300 || item === 8360) {
-	                d.elems = [];
-	              }
+	  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;
 
-	              _cache$2.data[d.id] = d;
+	    if (threshold === 0) {
+	      return 'too_bendy';
+	    }
 
-	              _cache$2.rtree.insert(encodeIssueRtree$2(d));
-	            }
-	          });
-	        }
+	    var maxDistance = 0;
 
-	        dispatch$3.call('loaded');
-	      })["catch"](function () {
-	        delete _cache$2.inflightTile[tile.id];
-	        _cache$2.loadedTile[tile.id] = true;
-	      });
-	    });
-	  },
-	  loadIssueDetail: function loadIssueDetail(issue) {
-	    var _this2 = this;
+	    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
 
-	    // Issue details only need to be fetched once
-	    if (issue.elems !== undefined) {
-	      return Promise.resolve(issue);
+	      if (isNaN(dist) || dist > threshold) {
+	        return 'too_bendy';
+	      } else if (dist > maxDistance) {
+	        maxDistance = dist;
+	      }
 	    }
 
-	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
+	    var keepingAllNodes = nodes.every(function (node, i) {
+	      return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+	    });
 
-	    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
+	    if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+	    keepingAllNodes) {
+	      return 'straight_enough';
+	    }
+	  };
 
-	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+	  action.transitionable = true;
+	  return action;
+	}
 
-	      _this2.replaceItem(issue);
-	    };
+	//
+	// `turn` must be an `osmTurn` object with a `restrictionID` property.
+	// see osm/intersection.js, pathToTurn()
+	//
 
-	    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);
+	function actionUnrestrictTurn(turn) {
+	  return function (graph) {
+	    return actionDeleteRelation(turn.restrictionID)(graph);
+	  };
+	}
 
-	    if (locale in _cache$2.strings && Object.keys(_cache$2.strings[locale]).length === items.length) {
-	      return Promise.resolve(_cache$2.strings[locale]);
-	    } // May be partially populated already if some requests were successful
+	/* Reflect the given area around its axis of symmetry */
 
+	function actionReflect(reflectIds, projection) {
+	  var _useLongAxis = true;
 
-	    if (!(locale in _cache$2.strings)) {
-	      _cache$2.strings[locale] = {};
-	    } // Only need to cache strings for supported issue types
-	    // Using multiple individual item + class requests to reduce fetched data size
+	  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);
 
-	    var allRequests = items.map(function (itemType) {
-	      // No need to request data we already have
-	      if (itemType in _cache$2.strings[locale]) return null;
+	    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 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$categories$;
 
-	        var _cat$items = _slicedToArray(cat.items, 1),
-	            _cat$items$ = _cat$items[0],
-	            item = _cat$items$ === void 0 ? {
-	          "class": []
-	        } : _cat$items$;
+	    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);
 
-	        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)
+	    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;
+	  };
 
-	        if (!cl) {
-	          /* eslint-disable no-console */
-	          console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
-	          /* eslint-enable no-console */
+	  action.useLongAxis = function (val) {
+	    if (!arguments.length) return _useLongAxis;
+	    _useLongAxis = val;
+	    return action;
+	  };
 
-	          return;
-	        } // Cache served item colors to automatically style issue markers later
+	  action.transitionable = true;
+	  return action;
+	}
 
+	function actionUpgradeTags(entityId, oldTags, replaceTags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
 
-	        var itemInt = item.item,
-	            color = item.color;
+	    var transferValue;
+	    var semiIndex;
 
-	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
-	          _cache$2.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
+	    for (var oldTagKey in oldTags) {
+	      if (!(oldTagKey in tags)) continue; // wildcard match
 
+	      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]);
 
-	        var title = cl.title,
-	            detail = cl.detail,
-	            fix = cl.fix,
-	            trap = cl.trap; // Osmose titles shouldn't contain markdown
+	        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;
+	          }
 
-	        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$2.strings[locale][itemType] = issueStrings;
-	      };
+	          vals.splice(oldIndex, 1);
+	          tags[oldTagKey] = vals.join(';');
+	        }
+	      }
+	    }
 
-	      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
+	    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;
+	          }
+	        }
+	      }
+	    }
 
-	      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$2.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$2.strings ? _cache$2.strings[locale][itemType] : {};
-	  },
-	  getColor: function getColor(itemType) {
-	    return itemType in _cache$2.colors ? _cache$2.colors[itemType] : '#FFFFFF';
-	  },
-	  postUpdate: function postUpdate(issue, callback) {
-	    var _this3 = this;
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
+	}
 
-	    if (_cache$2.inflightPost[issue.id]) {
-	      return callback({
-	        message: 'Issue update already inflight',
-	        status: -2
-	      }, issue);
-	    } // UI sets the status to either 'done' or 'false'
+	function behaviorEdit(context) {
+	  function behavior() {
+	    context.map().minzoom(context.minEditableZoom());
+	  }
 
+	  behavior.off = function () {
+	    context.map().minzoom(0);
+	  };
 
-	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
-	    var controller = new AbortController();
+	  return behavior;
+	}
 
-	    var after = function after() {
-	      delete _cache$2.inflightPost[issue.id];
+	/*
+	   The hover behavior adds the `.hover` class on pointerover to all elements to which
+	   the identical datum is bound, and removes it on pointerout.
 
-	      _this3.removeItem(issue);
+	   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.
+	 */
 
-	      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;
-	        }
+	function behaviorHover(context) {
+	  var dispatch = dispatch$8('hover');
 
-	        _cache$2.closed[issue.item] += 1;
-	      }
+	  var _selection = select(null);
 
-	      if (callback) callback(null, issue);
-	    };
+	  var _newNodeId = null;
+	  var _initialNodeID = null;
 
-	    _cache$2.inflightPost[issue.id] = controller;
-	    fetch(url, {
-	      signal: controller.signal
-	    }).then(after)["catch"](function (err) {
-	      delete _cache$2.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$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];
-	  },
-	  // 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$2.data[item.id] = item;
-	    updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
+	  var _altDisables;
 
-	    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$2(encodeIssueRtree$2(item), false); // false = remove
-	  },
-	  // Used to populate `closed:osmose:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$2.closed;
-	  },
-	  itemURL: function itemURL(item) {
-	    return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
-	  }
-	};
+	  var _ignoreVertex;
 
-	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('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'nodeChanged');
-	var _mlyFallback = false;
+	  var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
-	var _mlyCache;
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	var _mlyClicks;
+	  function keydown(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
 
-	var _mlyActiveImage;
+	      _selection.classed('hover-disabled', true);
 
-	var _mlySelectedImageKey;
+	      dispatch.call('hover', this, null);
+	    }
+	  }
 
-	var _mlyViewer;
+	  function keyup(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
-	var _mlyViewerFilter = ['all'];
+	      _selection.classed('hover-disabled', false);
 
-	var _loadViewerPromise;
+	      dispatch.call('hover', this, _targets);
+	    }
+	  }
 
-	var _mlyHighlightedDetection;
+	  function behavior(selection) {
+	    _selection = selection;
+	    _targets = [];
 
-	var _mlyShowFeatureDetections = false;
-	var _mlyShowSignDetections = false;
+	    if (_initialNodeID) {
+	      _newNodeId = _initialNodeID;
+	      _initialNodeID = null;
+	    } else {
+	      _newNodeId = null;
+	    }
 
-	function abortRequest$3(controller) {
-	  controller.abort();
-	}
+	    _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+	    .on(_pointerPrefix + 'down.hover', pointerover);
 
-	function loadTiles(which, url, projection) {
-	  var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	  var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
-	  var cache = _mlyCache[which];
-	  Object.keys(cache.inflight).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) {
-	      return k.indexOf(tile.id + ',') === 0;
-	    });
+	    function eventTarget(d3_event) {
+	      var datum = d3_event.target && d3_event.target.__data__;
+	      if (_typeof(datum) !== 'object') return null;
 
-	    if (!wanted) {
-	      abortRequest$3(cache.inflight[k]);
-	      delete cache.inflight[k];
-	    }
-	  });
-	  tiles.forEach(function (tile) {
-	    loadNextTilePage(which, currZoom, url, tile);
-	  });
-	}
+	      if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+	        return datum.properties.entity;
+	      }
 
-	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(',')
-	  });
-	  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: 'GET',
-	    signal: controller.signal,
-	    headers: {
-	      'Content-Type': 'application/json'
-	    }
-	  };
-	  fetch(nextURL, options).then(function (response) {
-	    if (!response.ok) {
-	      throw new Error(response.status + ' ' + response.statusText);
+	      return datum;
 	    }
 
-	    var linkHeader = response.headers.get('Link');
+	    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);
 
-	    if (linkHeader) {
-	      var pagination = parsePagination(linkHeader);
+	      if (target && _targets.indexOf(target) === -1) {
+	        _targets.push(target);
 
-	      if (pagination.next) {
-	        cache.nextURL[tile.id] = pagination.next;
+	        updateHover(d3_event, _targets);
 	      }
 	    }
 
-	    return response.json();
-	  }).then(function (data) {
-	    cache.loaded[id] = true;
-	    delete cache.inflight[id];
+	    function pointerout(d3_event) {
+	      var target = eventTarget(d3_event);
 
-	    if (!data || !data.features || !data.features.length) {
-	      throw new Error('No Data');
-	    }
+	      var index = _targets.indexOf(target);
 
-	    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 (index !== -1) {
+	        _targets.splice(index);
 
-	      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
-	        // 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
-	        };
+	        updateHover(d3_event, _targets);
 	      }
-
-	      return {
-	        minX: loc[0],
-	        minY: loc[1],
-	        maxX: loc[0],
-	        maxY: loc[1],
-	        data: d
-	      };
-	    }).filter(Boolean);
-
-	    if (cache.rtree && features) {
-	      cache.rtree.load(features);
 	    }
 
-	    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
+	    function allowsVertex(d) {
+	      return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
 	    }
 
-	    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];
-	  });
-	}
+	    function modeAllowsHover(target) {
+	      var mode = context.mode();
 
-	function loadData(which, url) {
-	  var cache = _mlyCache[which];
-	  var options = {
-	    method: 'GET',
-	    headers: {
-	      'Content-Type': 'application/json'
-	    }
-	  };
-	  var nextUrl = url + '&client_id=' + clientId;
-	  return fetch(nextUrl, options).then(function (response) {
-	    if (!response.ok) {
-	      throw new Error(response.status + ' ' + response.statusText);
-	    }
+	      if (mode.id === 'add-point') {
+	        return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+	      }
 
-	    return response.json();
-	  }).then(function (data) {
-	    if (!data || !data.features || !data.features.length) {
-	      throw new Error('No Data');
+	      return true;
 	    }
 
-	    data.features.forEach(function (feature) {
-	      var d;
+	    function updateHover(d3_event, targets) {
+	      _selection.selectAll('.hover').classed('hover', false);
 
-	      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
-	        };
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
 
-	        if (!cache.forImageKey[d.image_key]) {
-	          cache.forImageKey[d.image_key] = [];
-	        }
+	      var mode = context.mode();
 
-	        cache.forImageKey[d.image_key].push(d);
+	      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;
 	      }
-	    });
-	  });
-	}
-
-	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;
-	} // extract links to pages of API results
 
+	      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);
+	        }
 
-	function parsePagination(links) {
-	  return links.split(',').map(function (rel) {
-	    var elements = rel.split(';');
+	        return true;
+	      });
+	      var selector = '';
 
-	    if (elements.length === 2) {
-	      return [/<(.+)>/.exec(elements[0])[1], /rel="(.+)"/.exec(elements[1])[1]];
-	    } else {
-	      return ['', ''];
-	    }
-	  }).reduce(function (pagination, val) {
-	    pagination[val[1]] = val[0];
-	    return pagination;
-	  }, {});
-	} // partition viewport into higher zoom tiles
+	      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;
 
-	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
+	          if (datum.type === 'relation') {
+	            for (var j in datum.members) {
+	              selector += ', .' + datum.members[j].id;
+	            }
+	          }
+	        }
+	      }
 
-	  var tiler = utilTiler().zoomExtent([z2, z2]);
-	  return tiler.getTiles(projection).map(function (tile) {
-	    return tile.extent;
-	  });
-	} // no more than `limit` results per partition.
+	      var suppressed = _altDisables && d3_event && d3_event.altKey;
 
+	      if (selector.trim().length) {
+	        // remove the first comma
+	        selector = selector.slice(1);
 
-	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;
-	  }, []);
-	}
+	        _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+	      }
 
-	var serviceMapillary = {
-	  init: function init() {
-	    if (!_mlyCache) {
-	      this.reset();
+	      dispatch.call('hover', this, !suppressed && targets);
 	    }
+	  }
 
-	    this.event = utilRebind(this, dispatch$4, 'on');
-	  },
-	  reset: function reset() {
-	    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);
-	    }
+	  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);
+	  };
 
-	    _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: {}
-	      }
-	    };
-	    _mlySelectedImageKey = null;
-	    _mlyActiveImage = null;
-	    _mlyClicks = [];
-	  },
-	  images: function images(projection) {
-	    var limit = 5;
-	    return searchLimited(limit, projection, _mlyCache.images.rtree);
-	  },
-	  signs: function signs(projection) {
-	    var limit = 5;
-	    return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-	  },
-	  mapFeatures: function mapFeatures(projection) {
-	    var limit = 5;
-	    return searchLimited(limit, projection, _mlyCache.points.rtree);
-	  },
-	  cachedImage: function cachedImage(imageKey) {
-	    return _mlyCache.images.forImageKey[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 sequenceKeys = {}; // all sequences for images in viewport
+	  behavior.altDisables = function (val) {
+	    if (!arguments.length) return _altDisables;
+	    _altDisables = val;
+	    return behavior;
+	  };
 
-	    _mlyCache.images.rtree.search(bbox).forEach(function (d) {
-	      var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
+	  behavior.ignoreVertex = function (val) {
+	    if (!arguments.length) return _ignoreVertex;
+	    _ignoreVertex = val;
+	    return behavior;
+	  };
 
-	      if (sequenceKey) {
-	        sequenceKeys[sequenceKey] = true;
-	      }
-	    }); // Return lineStrings for the sequences
+	  behavior.initialNodeID = function (nodeId) {
+	    _initialNodeID = nodeId;
+	    return behavior;
+	  };
 
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	    return Object.keys(sequenceKeys).map(function (sequenceKey) {
-	      return _mlyCache.sequences.lineString[sequenceKey];
-	    });
-	  },
-	  signsSupported: function signsSupported() {
-	    return true;
-	  },
-	  loadImages: function loadImages(projection) {
-	    loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	    loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-	  },
-	  loadSigns: function loadSigns(projection) {
-	    loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
-	  },
-	  loadMapFeatures: function loadMapFeatures(projection) {
-	    loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	  },
-	  ensureViewerLoaded: function ensureViewerLoaded(context) {
-	    if (_loadViewerPromise) return _loadViewerPromise; // add mly-wrapper
+	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 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 = new Promise(function (resolve, reject) {
-	      var loadedCount = 0;
+	  var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-	      function loaded() {
-	        loadedCount += 1; // wait until both files are loaded
+	  var _edit = behaviorEdit(context);
 
-	        if (loadedCount === 2) resolve();
-	      }
+	  var _closeTolerance = 4;
+	  var _tolerance = 12;
+	  var _mouseLeave = false;
+	  var _lastMouse = null;
 
-	      var head = select('head'); // load mapillary-viewercss
+	  var _lastPointerUpEvent;
 
-	      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
+	  var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
-	      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 = null;
-	    }).then(function () {
-	      that.initViewer(context);
-	    });
-	    return _loadViewerPromise;
-	  },
-	  loadSignResources: function loadSignResources(context) {
-	    context.ui().svgDefs.addSprites(['mapillary-sprite'], false
-	    /* don't override colors */
-	    );
-	    return this;
-	  },
-	  loadObjectResources: function loadObjectResources(context) {
-	    context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
-	    /* don't override colors */
-	    );
-	    return this;
-	  },
-	  resetTags: function resetTags() {
-	    if (_mlyViewer && !_mlyFallback) {
-	      _mlyViewer.getComponent('tag').removeAll(); // remove previous detections
 
-	    }
-	  },
-	  showFeatureDetections: function showFeatureDetections(value) {
-	    _mlyShowFeatureDetections = value;
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+	  // - `mode/drag_node.js` `datum()`
 
-	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
-	      this.resetTags();
-	    }
-	  },
-	  showSignDetections: function showSignDetections(value) {
-	    _mlyShowSignDetections = value;
 
-	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
-	      this.resetTags();
-	    }
-	  },
-	  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 usernames = context.photos().usernames();
-	    var filter = ['all'];
-	    if (!showsPano) filter.push(['==', 'pano', false]);
-	    if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
-	    if (usernames && usernames.length) filter.push(['==', 'username', usernames[0]]);
+	  function datum(d3_event) {
+	    var mode = context.mode();
+	    var isNote = mode && mode.id.indexOf('note') !== -1;
+	    if (d3_event.altKey || isNote) return {};
+	    var element;
 
-	    if (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      filter.push(['>=', 'capturedAt', fromTimestamp]);
-	    }
+	    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)
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      filter.push(['>=', 'capturedAt', toTimestamp]);
-	    }
 
-	    if (_mlyViewer) {
-	      _mlyViewer.setFilter(filter);
-	    }
+	    var d = element.__data__;
+	    return d && d.properties && d.properties.target ? d : {};
+	  }
 
-	    _mlyViewerFilter = filter;
-	    return filter;
-	  },
-	  showViewer: function showViewer(context) {
-	    var wrap = context.container().select('.photoviewer').classed('hide', false);
-	    var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
+	  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));
+	  }
 
-	    if (isHidden && _mlyViewer) {
-	      wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
-	      wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
+	  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);
 
-	      _mlyViewer.resize();
+	    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);
 	    }
+	  }
 
-	    return this;
-	  },
-	  hideViewer: function hideViewer(context) {
-	    _mlyActiveImage = null;
-	    _mlySelectedImageKey = null;
+	  function pointermove(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+	      var p2 = _downPointer.pointerLocGetter(d3_event);
 
-	    if (!_mlyFallback && _mlyViewer) {
-	      _mlyViewer.getComponent('sequence').stop();
+	      var dist = geoVecLength(_downPointer.downLoc, p2);
+
+	      if (dist >= _closeTolerance) {
+	        _downPointer.isCancelled = true;
+	        dispatch.call('downcancel', this);
+	      }
 	    }
 
-	    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('nodeChanged');
-	    return this.setStyles(context, null, true);
-	  },
-	  parsePagination: parsePagination,
-	  updateUrlImage: function updateUrlImage(imageKey) {
-	    if (!window.mocha) {
-	      var hash = utilStringQs(window.location.hash);
+	    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 (imageKey) {
-	        hash.photo = 'mapillary/' + imageKey;
-	      } else {
-	        delete hash.photo;
+	    if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+	    _lastMouse = d3_event;
+	    dispatch.call('move', this, d3_event, datum(d3_event));
+	  }
+
+	  function pointercancel(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+	      if (!_downPointer.isCancelled) {
+	        dispatch.call('downcancel', this);
 	      }
 
-	      window.location.replace('#' + utilQsString(hash, true));
-	    }
-	  },
-	  highlightDetection: function highlightDetection(detection) {
-	    if (detection) {
-	      _mlyHighlightedDetection = detection.detection_key;
+	      _downPointer = null;
 	    }
+	  }
 
-	    return this;
-	  },
-	  initViewer: function initViewer(context) {
-	    var that = this;
-	    if (!window.Mapillary) return;
-	    var opts = {
-	      baseImageSize: 320,
-	      component: {
-	        cover: false,
-	        keyboard: false,
-	        tag: true
-	      }
-	    }; // 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
+	  function mouseenter() {
+	    _mouseLeave = false;
+	  }
 
-	      };
-	    }
+	  function mouseleave() {
+	    _mouseLeave = true;
+	  }
 
-	    _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
+	  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()`
 
-	    _mlyViewer.on('nodechanged', nodeChanged);
 
-	    _mlyViewer.on('bearingchanged', bearingChanged);
+	  function click(d3_event, loc) {
+	    var d = datum(d3_event);
+	    var target = d && d.properties && d.properties.entity;
+	    var mode = context.mode();
 
-	    if (_mlyViewerFilter) {
-	      _mlyViewer.setFilter(_mlyViewerFilter);
-	    } // Register viewer resize handler
+	    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());
 
+	      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
 
-	    context.ui().photoviewer.on('resize.mapillary', function () {
-	      if (_mlyViewer) _mlyViewer.resize();
-	    }); // 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) {
-	      that.resetTags();
-	      var clicks = _mlyClicks;
-	      var index = clicks.indexOf(node.key);
-	      var selectedKey = _mlySelectedImageKey;
-	      that.setActiveImage(node);
+	  function space(d3_event) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var currSpace = context.map().mouse();
 
-	      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 (_disableSpace && _lastSpace) {
+	      var dist = geoVecLength(_lastSpace, currSpace);
 
-	        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);
+	      if (dist > _tolerance) {
+	        _disableSpace = false;
 	      }
-
-	      dispatch$4.call('nodeChanged');
 	    }
 
-	    function bearingChanged(e) {
-	      dispatch$4.call('bearingChanged', undefined, e);
-	    }
-	  },
-	  // 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 selectImage(context, imageKey, fromViewer) {
-	    _mlySelectedImageKey = imageKey;
-	    this.updateUrlImage(imageKey);
-	    var d = _mlyCache.images.forImageKey[imageKey];
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) viewer.datum(d);
-	    imageKey = d && d.key || imageKey;
+	    if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
-	    if (!fromViewer && imageKey) {
-	      _mlyClicks.push(imageKey);
-	    }
+	    _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
 
-	    this.setStyles(context, null, true);
+	    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);
+	  }
 
-	    if (_mlyShowFeatureDetections) {
-	      this.updateDetections(imageKey, apibase + 'image_detections?layers=points&values=' + mapFeatureConfig.values + '&image_keys=' + imageKey);
-	    }
+	  function backspace(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('undo');
+	  }
 
-	    if (_mlyShowSignDetections) {
-	      this.updateDetections(imageKey, apibase + 'image_detections?layers=trafficsigns&image_keys=' + imageKey);
-	    }
+	  function del(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('cancel');
+	  }
 
-	    if (_mlyViewer && imageKey) {
-	      _mlyViewer.moveToKey(imageKey)["catch"](function (e) {
-	        console.error('mly3', e);
-	      }); // eslint-disable-line no-console
+	  function ret(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('finish');
+	  }
 
-	    }
+	  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;
+	  }
 
-	    return this;
-	  },
-	  getActiveImage: function getActiveImage() {
-	    return _mlyActiveImage;
-	  },
-	  getSelectedImageKey: function getSelectedImageKey() {
-	    return _mlySelectedImageKey;
-	  },
-	  getSequenceKeyForImageKey: function getSequenceKeyForImageKey(imageKey) {
-	    return _mlyCache.sequences.forImageKey[imageKey];
-	  },
-	  setActiveImage: function setActiveImage(node) {
-	    if (node) {
-	      _mlyActiveImage = {
-	        ca: node.originalCA,
-	        key: node.key,
-	        loc: [node.originalLatLon.lon, node.originalLatLon.lat],
-	        pano: node.pano
-	      };
-	    } else {
-	      _mlyActiveImage = null;
-	    }
-	  },
-	  // 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);
-	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
-	    }
+	  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
 
-	    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 || [];
-	    var selectedImageKey = _mlySelectedImageKey;
-	    var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-	    var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-	    var selectedImageKeys = selectedLineString && selectedLineString.properties.coordinateProperties.image_keys || []; // highlight sibling viewfields on either the selected or the hovered sequences
+	    select(document).call(keybinding.unbind);
+	  };
 
-	    var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-	    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;
-	    });
-	    context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
-	      return d.properties.key === hoveredSequenceKey;
-	    }).classed('currentView', function (d) {
-	      return d.properties.key === selectedSequenceKey;
-	    }); // update viewfields if needed
+	  behavior.hover = function () {
+	    return _hover;
+	  };
 
-	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
+	function initRange(domain, range) {
+	  switch (arguments.length) {
+	    case 0:
+	      break;
 
-	      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';
-	      }
-	    }
+	    case 1:
+	      this.range(domain);
+	      break;
 
-	    return this;
-	  },
-	  updateDetections: function updateDetections(imageKey, url) {
-	    if (!_mlyViewer || _mlyFallback) return;
-	    if (!imageKey) return;
+	    default:
+	      this.range(range).domain(domain);
+	      break;
+	  }
 
-	    if (!_mlyCache.image_detections.forImageKey[imageKey]) {
-	      loadData('image_detections', url).then(function () {
-	        showDetections(_mlyCache.image_detections.forImageKey[imageKey] || []);
-	      });
-	    } else {
-	      showDetections(_mlyCache.image_detections.forImageKey[imageKey]);
-	    }
+	  return this;
+	}
 
-	    function showDetections(detections) {
-	      detections.forEach(function (data) {
-	        var tag = makeTag(data);
+	function constants(x) {
+	  return function () {
+	    return x;
+	  };
+	}
 
-	        if (tag) {
-	          var tagComponent = _mlyViewer.getComponent('tag');
+	function number(x) {
+	  return +x;
+	}
 
-	          tagComponent.add([tag]);
-	        }
-	      });
-	    }
+	var unit = [0, 1];
+	function identity$1(x) {
+	  return x;
+	}
 
-	    function makeTag(data) {
-	      var valueParts = data.value.split('--');
-	      if (!valueParts.length) return;
-	      var tag;
-	      var text;
-	      var color = 0xffffff;
+	function normalize(a, b) {
+	  return (b -= a = +a) ? function (x) {
+	    return (x - a) / b;
+	  } : constants(isNaN(b) ? NaN : 0.5);
+	}
 
-	      if (_mlyHighlightedDetection === data.key) {
-	        color = 0xffff00;
-	        text = valueParts[1];
+	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].
 
-	        if (text === 'flat' || text === 'discrete' || text === 'sign') {
-	          text = valueParts[2];
-	        }
 
-	        text = text.replace(/-/g, ' ');
-	        text = text.charAt(0).toUpperCase() + text.slice(1);
-	        _mlyHighlightedDetection = null;
-	      }
+	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));
+	  };
+	}
 
-	      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: color,
-	          lineColor: color,
-	          lineWidth: 2,
-	          fillColor: color,
-	          fillOpacity: 0.3
-	        });
-	      } 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: color,
-	          textColor: color
-	        });
-	      }
+	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.
 
-	      return tag;
-	    }
-	  },
-	  cache: function cache() {
-	    return _mlyCache;
+	  if (domain[j] < domain[0]) {
+	    domain = domain.slice().reverse();
+	    range = range.slice().reverse();
 	  }
-	};
 
-	function validationIssue(attrs) {
-	  this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
+	  while (++i < j) {
+	    d[i] = normalize(domain[i], domain[i + 1]);
+	    r[i] = interpolate(range[i], range[i + 1]);
+	  }
 
-	  this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
+	  return function (x) {
+	    var i = bisectRight(domain, x, 1, j) - 1;
+	    return r[i](d[i](x));
+	  };
+	}
 
-	  this.severity = attrs.severity; // required - 'warning' or 'error'
+	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;
 
-	  this.message = attrs.message; // required - function returning localized string
+	  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;
+	  }
 
-	  this.reference = attrs.reference; // optional - function(selection) to render reference information
+	  function scale(x) {
+	    return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+	  }
 
-	  this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
+	  scale.invert = function (y) {
+	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+	  };
 
-	  this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
+	  scale.domain = function (_) {
+	    return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+	  };
 
-	  this.data = attrs.data; // optional - object containing extra data for the fixes
+	  scale.range = function (_) {
+	    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+	  };
 
-	  this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
+	  scale.rangeRound = function (_) {
+	    return range = Array.from(_), interpolate = interpolateRound, rescale();
+	  };
 
-	  this.hash = attrs.hash; // optional - string to further differentiate the issue
+	  scale.clamp = function (_) {
+	    return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+	  };
 
-	  this.id = generateID.apply(this); // generated - see below
+	  scale.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, rescale()) : interpolate;
+	  };
 
-	  this.autoFix = null; // generated - if autofix exists, will be set below
-	  // A unique, deterministic string hash.
-	  // Issues with identical id values are considered identical.
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : unknown;
+	  };
 
-	  function generateID() {
-	    var parts = [this.type];
+	  return function (t, u) {
+	    transform = t, untransform = u;
+	    return rescale();
+	  };
+	}
+	function continuous() {
+	  return transformer()(identity$1, identity$1);
+	}
 
-	    if (this.hash) {
-	      // subclasses can pass in their own differentiator
-	      parts.push(this.hash);
-	    }
+	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].
 
-	    if (this.subtype) {
-	      parts.push(this.subtype);
-	    } // include the entities this issue is for
-	    // (sort them so the id is deterministic)
+	function formatDecimalParts(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); // 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).
 
-	    if (this.entityIds) {
-	      var entityKeys = this.entityIds.slice().sort();
-	      parts.push.apply(parts, entityKeys);
-	    }
+	  return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+	}
 
-	    return parts.join(':');
-	  }
+	function exponent (x) {
+	  return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+	}
 
-	  this.extent = function (resolver) {
-	    if (this.loc) {
-	      return geoExtent(this.loc);
-	    }
+	function formatGroup (grouping, thousands) {
+	  return function (value, width) {
+	    var i = value.length,
+	        t = [],
+	        j = 0,
+	        g = grouping[0],
+	        length = 0;
 
-	    if (this.entityIds && this.entityIds.length) {
-	      return this.entityIds.reduce(function (extent, entityId) {
-	        return extent.extend(resolver.entity(entityId).extent(resolver));
-	      }, geoExtent());
+	    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 null;
+	    return t.reverse().join(thousands);
 	  };
+	}
 
-	  this.fixes = function (context) {
-	    var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-	    var issue = this;
+	function formatNumerals (numerals) {
+	  return function (value) {
+	    return value.replace(/[0-9]/g, function (i) {
+	      return numerals[+i];
+	    });
+	  };
+	}
 
-	    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);
-	        }
-	      }));
+	// [[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
+
+	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 + "";
+	}
+
+	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;
+	};
+
+	// 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;
 	    }
+	  }
 
-	    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
+	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+	}
 
-	      fix.issue = issue;
+	var $$5 = _export;
+	var uncurryThis$3 = functionUncurryThis;
+	var fails$3 = fails$V;
+	var thisNumberValue = thisNumberValue$3;
 
-	      if (fix.autoArgs) {
-	        issue.autoFix = fix;
-	      }
-	    });
-	    return fixes;
-	  };
+	var un$ToPrecision = uncurryThis$3(1.0.toPrecision);
+
+	var FORCED$1 = fails$3(function () {
+	  // IE7-
+	  return un$ToPrecision(1, undefined) !== '1';
+	}) || !fails$3(function () {
+	  // V8 ~ Android 4.3-
+	  un$ToPrecision({});
+	});
+
+	// `Number.prototype.toPrecision` method
+	// https://tc39.es/ecma262/#sec-number.prototype.toprecision
+	$$5({ target: 'Number', proto: true, forced: FORCED$1 }, {
+	  toPrecision: function toPrecision(precision) {
+	    return precision === undefined
+	      ? un$ToPrecision(thisNumberValue(this))
+	      : un$ToPrecision(thisNumberValue(this), precision);
+	  }
+	});
+
+	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 validationIssueFix(attrs) {
-	  this.title = attrs.title; // Required
 
-	  this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
+	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 identity (x) {
+	  return x;
+	}
 
-	  this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
+	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 + "";
 
-	  this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
+	  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".
 
-	  this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
+	    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.
 
-	  this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
+	    if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+	    // For SI-prefix, the suffix is lazily computed.
 
-	  this.issue = null; // Generated link - added by validationIssue
-	}
+	    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?
 
-	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 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].
 
-	      var expression = _positiveRegex[tagKey].join('|');
+	    precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
 
-	      var regex = new RegExp(expression);
-	      return function (tags) {
-	        return regex.test(tags[tagKey]);
-	      };
-	    },
-	    negativeRegex: function negativeRegex(_negativeRegex) {
-	      var tagKey = Object.keys(_negativeRegex)[0];
+	    function format(value) {
+	      var valuePrefix = prefix,
+	          valueSuffix = suffix,
+	          i,
+	          n,
+	          c;
 
-	      var expression = _negativeRegex[tagKey].join('|');
+	      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 regex = new RegExp(expression);
-	      return function (tags) {
-	        return !regex.test(tags[tagKey]);
-	      };
-	    }
-	  };
-	};
+	        var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
-	var buildLineKeys = function buildLineKeys() {
-	  return {
-	    highway: {
-	      rest_area: true,
-	      services: true
-	    },
-	    railway: {
-	      roundhouse: true,
-	      station: true,
-	      traverser: true,
-	      turntable: true,
-	      wash: true
-	    }
-	  };
-	};
+	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
-	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]));
-	      }
+	        if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-	      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, '');
-	      });
-	    };
+	        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-	    var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-	      var values;
-	      var isRegex = /regex/gi.test(key);
-	      var isEqual = /equals/gi.test(key);
+	        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.
 
-	      if (isRegex || isEqual) {
-	        Object.keys(selector[key]).forEach(function (selectorKey) {
-	          values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+	        if (maybeSuffix) {
+	          i = -1, n = value.length;
 
-	          if (expectedTags.hasOwnProperty(selectorKey)) {
-	            values = values.concat(expectedTags[selectorKey]);
+	          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;
+	            }
 	          }
-
-	          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]];
-
-	        if (expectedTags.hasOwnProperty(tagKey)) {
-	          values = values.concat(expectedTags[tagKey]);
 	        }
+	      } // If the fill character is not "0", grouping is applied before padding.
 
-	        expectedTags[tagKey] = values;
-	      }
 
-	      return expectedTags;
-	    }, {});
-	    return tagMap;
-	  },
-	  // inspired by osmWay#isArea()
-	  inferGeometry: function inferGeometry(tagMap) {
-	    var _lineKeys = this._lineKeys;
-	    var _areaKeys = this._areaKeys;
+	      if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-	    var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
-	      return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-	    };
+	      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 keyValueImpliesLine = function keyValueImpliesLine(key) {
-	      return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-	    };
+	      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-	    if (tagMap.hasOwnProperty('area')) {
-	      if (tagMap.area.indexOf('yes') > -1) {
-	        return 'area';
-	      }
+	      switch (align) {
+	        case "<":
+	          value = valuePrefix + value + valueSuffix + padding;
+	          break;
 
-	      if (tagMap.area.indexOf('no') > -1) {
-	        return 'line';
-	      }
-	    }
+	        case "=":
+	          value = valuePrefix + padding + value + valueSuffix;
+	          break;
 
-	    for (var key in tagMap) {
-	      if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-	        return 'area';
-	      }
+	        case "^":
+	          value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+	          break;
 
-	      if (key in _lineKeys && keyValueImpliesLine(key)) {
-	        return 'area';
+	        default:
+	          value = padding + valuePrefix + value + valueSuffix;
+	          break;
 	      }
+
+	      return numerals(value);
 	    }
 
-	    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]
-	          }));
-	        }
-	      }
+	    format.toString = function () {
+	      return specifier + "";
 	    };
 
-	    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 format;
 	  }
-	};
 
-	var apibase$1 = 'https://nominatim.openstreetmap.org/';
-	var _inflight = {};
-
-	var _nominatimCache;
+	  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;
+	    };
+	  }
 
-	var serviceNominatim = {
-	  init: function init() {
-	    _inflight = {};
-	    _nominatimCache = new RBush();
-	  },
-	  reset: function reset() {
-	    Object.values(_inflight).forEach(function (controller) {
-	      controller.abort();
-	    });
-	    _inflight = {};
-	    _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]
-	    });
+	  return {
+	    format: newFormat,
+	    formatPrefix: formatPrefix
+	  };
+	}
 
-	    if (cached.length > 0) {
-	      if (callback) callback(null, cached[0].data);
-	      return;
-	    }
+	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;
+	}
 
-	    var params = {
-	      zoom: 13,
-	      format: 'json',
-	      addressdetails: 1,
-	      lat: loc[1],
-	      lon: loc[0]
-	    };
-	    var url = apibase$1 + 'reverse?' + utilQsString(params);
-	    if (_inflight[url]) return;
-	    var controller = new AbortController();
-	    _inflight[url] = controller;
-	    d3_json(url, {
-	      signal: controller.signal
-	    }).then(function (result) {
-	      delete _inflight[url];
+	function precisionFixed (step) {
+	  return Math.max(0, -exponent(Math.abs(step)));
+	}
 
-	      if (result && result.error) {
-	        throw new Error(result.error);
-	      }
+	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 extent = geoExtent(loc).padByMeters(200);
+	function precisionRound (step, max) {
+	  step = Math.abs(step), max = Math.abs(max) - step;
+	  return Math.max(0, exponent(max) - exponent(step)) + 1;
+	}
 
-	      _nominatimCache.insert(Object.assign(extent.bbox(), {
-	        data: result
-	      }));
+	function tickFormat(start, stop, count, specifier) {
+	  var step = tickStep(start, stop, count),
+	      precision;
+	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 
-	      if (callback) callback(null, result);
-	    })["catch"](function (err) {
-	      delete _inflight[url];
-	      if (err.name === 'AbortError') return;
-	      if (callback) callback(err.message);
-	    });
-	  },
-	  search: function search(val, callback) {
-	    var searchVal = encodeURIComponent(val);
-	    var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
-	    if (_inflight[url]) return;
-	    var controller = new AbortController();
-	    _inflight[url] = controller;
-	    d3_json(url, {
-	      signal: controller.signal
-	    }).then(function (result) {
-	      delete _inflight[url];
+	  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);
+	      }
 
-	      if (result && result.error) {
-	        throw new Error(result.error);
+	    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 (callback) callback(null, result);
-	    })["catch"](function (err) {
-	      delete _inflight[url];
-	      if (err.name === 'AbortError') return;
-	      if (callback) callback(err.message);
-	    });
+	    case "f":
+	    case "%":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+	        break;
+	      }
 	  }
-	};
 
-	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;
+	  return format$1(specifier);
+	}
 
-	var _oscSelectedImage;
+	function linearish(scale) {
+	  var domain = scale.domain;
 
-	var _loadViewerPromise$1;
+	  scale.ticks = function (count) {
+	    var d = domain();
+	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+	  };
 
-	function abortRequest$4(controller) {
-	  controller.abort();
-	}
+	  scale.tickFormat = function (count, specifier) {
+	    var d = domain();
+	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+	  };
 
-	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;
-	}
+	  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;
 
-	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
+	    if (stop < start) {
+	      step = start, start = stop, stop = step;
+	      step = i0, i0 = i1, i1 = step;
+	    }
 
-	  var cache = _oscCache[which];
-	  Object.keys(cache.inflight).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) {
-	      return k.indexOf(tile.id + ',') === 0;
-	    });
+	    while (maxIter-- > 0) {
+	      step = tickIncrement(start, stop, count);
 
-	    if (!wanted) {
-	      abortRequest$4(cache.inflight[k]);
-	      delete cache.inflight[k];
-	    }
-	  });
-	  tiles.forEach(function (tile) {
-	    loadNextTilePage$1(which, currZoom, url, tile);
-	  });
-	}
+	      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;
+	      }
 
-	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 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'
+	      prestep = step;
 	    }
+
+	    return scale;
 	  };
-	  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');
-	    }
+	  return scale;
+	}
+	function linear() {
+	  var scale = continuous();
 
-	    var features = data.currentPageItems.map(function (item) {
-	      var loc = [+item.lng, +item.lat];
-	      var d;
+	  scale.copy = function () {
+	    return copy(scale, linear());
+	  };
 
-	      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
+	  initRange.apply(scale, arguments);
+	  return linearish(scale);
+	}
 
-	        var seq = _oscCache.sequences[d.sequence_id];
+	// eslint-disable-next-line es/no-math-expm1 -- safe
+	var $expm1 = Math.expm1;
+	var exp$1 = Math.exp;
 
-	        if (!seq) {
-	          seq = {
-	            rotation: 0,
-	            images: []
-	          };
-	          _oscCache.sequences[d.sequence_id] = seq;
-	        }
+	// `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;
 
-	        seq.images[d.sequence_index] = d;
-	        _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
-	      }
+	function quantize() {
+	  var x0 = 0,
+	      x1 = 1,
+	      n = 1,
+	      domain = [0.5],
+	      range = [0, 1],
+	      unknown;
 
-	      return {
-	        minX: loc[0],
-	        minY: loc[1],
-	        maxX: loc[0],
-	        maxY: loc[1],
-	        data: d
-	      };
-	    });
-	    cache.rtree.load(features);
+	  function scale(x) {
+	    return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+	  }
 
-	    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
-	    }
+	  function rescale() {
+	    var i = -1;
+	    domain = new Array(n);
 
-	    if (which === 'images') {
-	      dispatch$5.call('loadedImages');
+	    while (++i < n) {
+	      domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
 	    }
-	  })["catch"](function () {
-	    cache.loaded[id] = true;
-	    delete cache.inflight[id];
-	  });
-	} // partition viewport into higher zoom tiles
 
+	    return scale;
+	  }
 
-	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
+	  scale.domain = function (_) {
+	    var _ref, _ref2;
 
-	  var tiler = utilTiler().zoomExtent([z2, z2]);
-	  return tiler.getTiles(projection).map(function (tile) {
-	    return tile.extent;
-	  });
-	} // no more than `limit` results per partition.
+	    return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+	  };
 
+	  scale.range = function (_) {
+	    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+	  };
 
-	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;
-	  }, []);
-	}
+	  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]];
+	  };
 
-	var serviceOpenstreetcam = {
-	  init: function init() {
-	    if (!_oscCache) {
-	      this.reset();
-	    }
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : scale;
+	  };
 
-	    this.event = utilRebind(this, dispatch$5, 'on');
-	  },
-	  reset: function reset() {
-	    if (_oscCache) {
-	      Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-	    }
+	  scale.thresholds = function () {
+	    return domain.slice();
+	  };
 
-	    _oscCache = {
-	      images: {
-	        inflight: {},
-	        loaded: {},
-	        nextPage: {},
-	        rtree: new RBush(),
-	        forImageKey: {}
-	      },
-	      sequences: {}
-	    };
-	    _oscSelectedImage = null;
-	  },
-	  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
+	  scale.copy = function () {
+	    return quantize().domain([x0, x1]).range(range).unknown(unknown);
+	  };
 
-	    _oscCache.images.rtree.search(bbox).forEach(function (d) {
-	      sequenceKeys[d.data.sequence_id] = true;
-	    }); // make linestrings from those sequences
+	  return initRange.apply(linearish(scale), arguments);
+	}
 
+	var global$3 = global$1o;
+	var uncurryThis$2 = functionUncurryThis;
+	var fails$2 = fails$V;
+	var padStart = stringPad.start;
 
-	    var lineStrings = [];
-	    Object.keys(sequenceKeys).forEach(function (sequenceKey) {
-	      var seq = _oscCache.sequences[sequenceKey];
-	      var images = seq && seq.images;
+	var RangeError$2 = global$3.RangeError;
+	var abs$1 = Math.abs;
+	var DatePrototype = Date.prototype;
+	var n$DateToISOString = DatePrototype.toISOString;
+	var getTime = uncurryThis$2(DatePrototype.getTime);
+	var getUTCDate = uncurryThis$2(DatePrototype.getUTCDate);
+	var getUTCFullYear = uncurryThis$2(DatePrototype.getUTCFullYear);
+	var getUTCHours = uncurryThis$2(DatePrototype.getUTCHours);
+	var getUTCMilliseconds = uncurryThis$2(DatePrototype.getUTCMilliseconds);
+	var getUTCMinutes = uncurryThis$2(DatePrototype.getUTCMinutes);
+	var getUTCMonth = uncurryThis$2(DatePrototype.getUTCMonth);
+	var getUTCSeconds = uncurryThis$2(DatePrototype.getUTCSeconds);
 
-	      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$2 + '/1.0/list/nearby-photos/';
-	    loadTiles$1('images', url, projection);
-	  },
-	  ensureViewerLoaded: function ensureViewerLoaded(context) {
-	    if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper
+	// `Date.prototype.toISOString` method implementation
+	// https://tc39.es/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit fails here:
+	var dateToIsoString = (fails$2(function () {
+	  return n$DateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
+	}) || !fails$2(function () {
+	  n$DateToISOString.call(new Date(NaN));
+	})) ? function toISOString() {
+	  if (!isFinite(getTime(this))) throw RangeError$2('Invalid time value');
+	  var date = this;
+	  var year = getUTCFullYear(date);
+	  var milliseconds = getUTCMilliseconds(date);
+	  var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+	  return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
+	    '-' + padStart(getUTCMonth(date) + 1, 2, 0) +
+	    '-' + padStart(getUTCDate(date), 2, 0) +
+	    'T' + padStart(getUTCHours(date), 2, 0) +
+	    ':' + padStart(getUTCMinutes(date), 2, 0) +
+	    ':' + padStart(getUTCSeconds(date), 2, 0) +
+	    '.' + padStart(milliseconds, 3, 0) +
+	    'Z';
+	} : n$DateToISOString;
 
-	    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
+	var $$4 = _export;
+	var toISOString = dateToIsoString;
 
-	    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);
-	    });
+	// `Date.prototype.toISOString` method
+	// https://tc39.es/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit has a broken implementations
+	$$4({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== toISOString }, {
+	  toISOString: toISOString
+	});
 
-	    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 behaviorBreathe() {
+	  var duration = 800;
+	  var steps = 4;
+	  var selector = '.selected.shadow, .selected .shadow';
 
-	    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)');
-	      };
-	    }
+	  var _selected = select(null);
 
-	    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
+	  var _classed = '';
+	  var _params = {};
+	  var _done = false;
 
+	  var _timer;
 
-	    _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();
+	  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 || '');
+	    };
+	  }
 
-	    if (isHidden) {
-	      viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
-	      viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
-	    }
+	  function reset(selection) {
+	    selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+	  }
 
-	    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();
+	  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');
+	    });
+	  }
 
-	    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)');
+	  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 (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 (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..
 
-	      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');
-	    }
+	      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;
+	    });
+	  }
 
-	    return this;
+	  function run(surface, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    var currSelected = surface.selectAll(selector);
+	    var currClassed = surface.attr('class');
 
-	    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);
-	    }
-	  },
-	  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);
+	    if (_done || currSelected.empty()) {
+	      _selected.call(reset);
+
+	      _selected = select(null);
+	      return;
 	    }
 
-	    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
+	    if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+	      _selected.call(reset);
 
-	    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
+	      _classed = currClassed;
+	      _selected = currSelected.call(calcAnimationParams);
+	    }
 
-	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+	    var didCallNextRun = false;
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
+	    _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
 
-	      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;
-	  },
-	  updateUrlImage: function updateUrlImage(imageKey) {
-	    if (!window.mocha) {
-	      var hash = utilStringQs(window.location.hash);
+	      if (!select(this).classed('selected')) {
+	        reset(select(this));
+	      }
+	    });
+	  }
 
-	      if (imageKey) {
-	        hash.photo = 'openstreetcam/' + imageKey;
-	      } else {
-	        delete hash.photo;
+	  function behavior(surface) {
+	    _done = false;
+	    _timer = timer(function () {
+	      // wait for elements to actually become selected
+	      if (surface.selectAll(selector).empty()) {
+	        return false;
 	      }
 
-	      window.location.replace('#' + utilQsString(hash, true));
-	    }
-	  },
-	  cache: function cache() {
-	    return _oscCache;
-	  }
-	};
+	      surface.call(run, 'from');
 
-	var FORCED$f = fails(function () {
-	  return new Date(NaN).toJSON() !== null
-	    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
-	});
+	      _timer.stop();
 
-	// `Date.prototype.toJSON` method
-	// https://tc39.github.io/ecma262/#sec-date.prototype.tojson
-	_export({ target: 'Date', proto: true, forced: FORCED$f }, {
-	  // eslint-disable-next-line no-unused-vars
-	  toJSON: function toJSON(key) {
-	    var O = toObject(this);
-	    var pv = toPrimitive(O);
-	    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+	      return true;
+	    }, 20);
 	  }
-	});
 
-	// `URL.prototype.toJSON` method
-	// https://url.spec.whatwg.org/#dom-url-tojson
-	_export({ target: 'URL', proto: true, enumerable: true }, {
-	  toJSON: function toJSON() {
-	    return URL.prototype.toString.call(this);
-	  }
-	});
+	  behavior.restartIfNeeded = function (surface) {
+	    if (_selected.empty()) {
+	      surface.call(run, 'from');
 
-	/**
-	 * 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);
+	      if (_timer) {
+	        _timer.stop();
+	      }
+	    }
+	  };
+
+	  behavior.off = function () {
+	    _done = true;
 
-	  return value != null && (type == 'object' || type == 'function');
-	}
+	    if (_timer) {
+	      _timer.stop();
+	    }
 
-	/** Detect free variable `global` from Node.js. */
-	var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
+	    _selected.interrupt().call(reset);
+	  };
 
-	/** Detect free variable `self`. */
+	  return behavior;
+	}
 
-	var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
-	/** Used as a reference to the global object. */
+	/* Creates a keybinding behavior for an operation */
+	function behaviorOperation(context) {
+	  var _operation;
 
-	var root$1 = freeGlobal || freeSelf || Function('return this')();
+	  function keypress(d3_event) {
+	    // prevent operations during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+	    d3_event.preventDefault();
 
-	/**
-	 * 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 disabled = _operation.disabled();
 
-	var now$1 = function now() {
-	  return root$1.Date.now();
-	};
+	    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);
 
-	/** Built-in value references. */
+	      _operation();
+	    }
+	  }
 
-	var _Symbol = root$1.Symbol;
+	  function behavior() {
+	    if (_operation && _operation.available()) {
+	      context.keybinding().on(_operation.keys, keypress);
+	    }
 
-	/** Used for built-in method references. */
+	    return behavior;
+	  }
 
-	var objectProto = Object.prototype;
-	/** Used to check objects for own properties. */
+	  behavior.off = function () {
+	    context.keybinding().off(_operation.keys);
+	  };
 
-	var hasOwnProperty$1 = objectProto.hasOwnProperty;
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
+	  behavior.which = function (_) {
+	    if (!arguments.length) return _operation;
+	    _operation = _;
+	    return behavior;
+	  };
 
-	var nativeObjectToString = objectProto.toString;
-	/** Built-in value references. */
+	  return behavior;
+	}
 
-	var symToStringTag = _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`.
-	 */
+	function operationCircularize(context, selectedIDs) {
+	  var _extent;
 
-	function getRawTag(value) {
-	  var isOwn = hasOwnProperty$1.call(value, symToStringTag),
-	      tag = value[symToStringTag];
+	  var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-	  try {
-	    value[symToStringTag] = undefined;
-	    var unmasked = true;
-	  } catch (e) {}
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	  var result = nativeObjectToString.call(value);
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
 
-	  if (unmasked) {
-	    if (isOwn) {
-	      value[symToStringTag] = tag;
+	  function getAction(entityID) {
+	    var entity = context.entity(entityID);
+	    if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
+
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
 	    } else {
-	      delete value[symToStringTag];
+	      _extent = _extent.extend(entity.extent(context.graph()));
 	    }
+
+	    return actionCircularize(entityID, context.projection);
 	  }
 
-	  return result;
-	}
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
-	/** Used for built-in method references. */
-	var objectProto$1 = Object.prototype;
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
+	        }
+	      });
 
-	var nativeObjectToString$1 = objectProto$1.toString;
-	/**
-	 * Converts `value` to a string using `Object.prototype.toString`.
-	 *
-	 * @private
-	 * @param {*} value The value to convert.
-	 * @returns {string} Returns the converted string.
-	 */
+	      return graph;
+	    };
 
-	function objectToString$1(value) {
-	  return nativeObjectToString$1.call(value);
-	}
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	/** `Object#toString` result references. */
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
-	var nullTag = '[object Null]',
-	    undefinedTag = '[object Undefined]';
-	/** Built-in value references. */
 
-	var symToStringTag$1 = _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`.
-	 */
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	function baseGetTag(value) {
-	  if (value == null) {
-	    return value === undefined ? undefinedTag : nullTag;
-	  }
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
-	  return symToStringTag$1 && symToStringTag$1 in Object(value) ? getRawTag(value) : objectToString$1(value);
-	}
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be circularized
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
-	/**
-	 * 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';
-	}
+	      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';
+	    }
 
-	/** `Object#toString` result references. */
+	    return false;
 
-	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 someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	function isSymbol$1(value) {
-	  return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
-	}
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	/** Used as references for various `Number` constants. */
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	var NAN = 0 / 0;
-	/** Used to match leading and trailing whitespace. */
+	      return false;
+	    }
+	  };
 
-	var reTrim = /^\s+|\s+$/g;
-	/** Used to detect bad signed hexadecimal string values. */
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+	  };
 
-	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
-	/** Used to detect binary string values. */
+	  operation.annotation = function () {
+	    return _t('operations.circularize.annotation.feature', {
+	      n: _actions.length
+	    });
+	  };
 
-	var reIsBinary = /^0b[01]+$/i;
-	/** Used to detect octal string values. */
+	  operation.id = 'circularize';
+	  operation.keys = [_t('operations.circularize.key')];
+	  operation.title = _t('operations.circularize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	var reIsOctal = /^0o[0-7]+$/i;
-	/** Built-in method references without a dependency on `root`. */
+	// For example, ⌘Z -> Ctrl+Z
 
-	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
-	 */
+	var uiCmd = function uiCmd(code) {
+	  var detected = utilDetect();
 
-	function toNumber$1(value) {
-	  if (typeof value == 'number') {
-	    return value;
+	  if (detected.os === 'mac') {
+	    return code;
 	  }
 
-	  if (isSymbol$1(value)) {
-	    return NAN;
+	  if (detected.os === 'win') {
+	    if (code === '⌘⇧Z') return 'Ctrl+Y';
 	  }
 
-	  if (isObject$1(value)) {
-	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-	    value = isObject$1(other) ? other + '' : other;
-	  }
+	  var result = '',
+	      replacements = {
+	    '⌘': 'Ctrl',
+	    '⇧': 'Shift',
+	    '⌥': 'Alt',
+	    '⌫': 'Backspace',
+	    '⌦': 'Delete'
+	  };
 
-	  if (typeof value != 'string') {
-	    return value === 0 ? value : +value;
+	  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];
+	    }
 	  }
 
-	  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';
-	/* Built-in method references for those with the same name as other `lodash` methods. */
-
-	var nativeMax = Math.max,
-	    nativeMin = Math.min;
-	/**
-	 * 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;
+	  return result;
+	}; // return a display-focused string for a given keyboard code
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT);
-	  }
+	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;
+	};
 
-	  wait = toNumber$1(wait) || 0;
+	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());
 
-	  if (isObject$1(options)) {
-	    leading = !!options.leading;
-	    maxing = 'maxWait' in options;
-	    maxWait = maxing ? nativeMax(toNumber$1(options.maxWait) || 0, wait) : maxWait;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
-	  }
+	  var operation = function operation() {
+	    var nextSelectedID;
+	    var nextSelectedLoc;
 
-	  function invokeFunc(time) {
-	    var args = lastArgs,
-	        thisArg = lastThis;
-	    lastArgs = lastThis = undefined;
-	    lastInvokeTime = time;
-	    result = func.apply(thisArg, args);
-	    return result;
-	  }
+	    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.
 
-	  function leadingEdge(time) {
-	    // Reset any `maxWait` timer.
-	    lastInvokeTime = time; // Start the timer for the trailing edge.
+	      if (geometry === 'vertex') {
+	        var nodes = parent.nodes;
+	        var i = nodes.indexOf(id);
 
-	    timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
+	        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;
+	        }
 
-	    return leading ? invokeFunc(time) : result;
-	  }
+	        nextSelectedID = nodes[i];
+	        nextSelectedLoc = context.entity(nextSelectedID).loc;
+	      }
+	    }
 
-	  function remainingWait(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime,
-	        timeWaiting = wait - timeSinceLastCall;
-	    return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
-	  }
+	    context.perform(action, operation.annotation());
+	    context.validator().validate();
 
-	  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.
+	    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 lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
-	  }
+	  operation.available = function () {
+	    return true;
+	  };
 
-	  function timerExpired() {
-	    var time = now$1();
+	  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';
+	    }
 
-	    if (shouldInvoke(time)) {
-	      return trailingEdge(time);
-	    } // Restart the timer.
+	    return false;
 
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    timerId = setTimeout(timerExpired, remainingWait(time));
-	  }
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	  function trailingEdge(time) {
-	    timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
-	    // debounced at least once.
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	    if (trailing && lastArgs) {
-	      return invokeFunc(time);
+	      return false;
 	    }
 
-	    lastArgs = lastThis = undefined;
-	    return result;
-	  }
-
-	  function cancel() {
-	    if (timerId !== undefined) {
-	      clearTimeout(timerId);
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
 	    }
 
-	    lastInvokeTime = 0;
-	    lastArgs = lastCallTime = lastThis = timerId = undefined;
-	  }
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
 
-	  function flush() {
-	    return timerId === undefined ? result : trailingEdge(now$1());
-	  }
+	    function protectedMember(id) {
+	      var entity = context.entity(id);
+	      if (entity.type !== 'way') return false;
+	      var parents = context.graph().parentRelations(entity);
 
-	  function debounced() {
-	    var time = now$1(),
-	        isInvoking = shouldInvoke(time);
-	    lastArgs = arguments;
-	    lastThis = this;
-	    lastCallTime = time;
+	      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 (isInvoking) {
-	      if (timerId === undefined) {
-	        return leadingEdge(lastCallTime);
+	        if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+	          return true;
+	        }
 	      }
 
-	      if (maxing) {
-	        // Handle invocations in a tight loop.
-	        clearTimeout(timerId);
-	        timerId = setTimeout(timerExpired, wait);
-	        return invokeFunc(lastCallTime);
-	      }
+	      return false;
 	    }
+	  };
 
-	    if (timerId === undefined) {
-	      timerId = setTimeout(timerExpired, wait);
-	    }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+	  };
 
-	    return result;
-	  }
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	  debounced.cancel = cancel;
-	  debounced.flush = flush;
-	  return debounced;
+	  operation.id = 'delete';
+	  operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+	  operation.title = _t('operations.delete.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	/** Error message constants. */
-
-	var FUNC_ERROR_TEXT$1 = '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 operationOrthogonalize(context, selectedIDs) {
+	  var _extent;
 
-	function throttle(func, wait, options) {
-	  var leading = true,
-	      trailing = true;
+	  var _type;
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT$1);
-	  }
+	  var _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-	  if (isObject$1(options)) {
-	    leading = 'leading' in options ? !!options.leading : leading;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
-	  }
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	  return debounce(func, wait, {
-	    'leading': leading,
-	    'maxWait': wait,
-	    'trailing': trailing
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
 	  });
-	}
-
-	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 utf8Encode(str) {
-	      var x,
-	          y,
-	          output = '',
-	          i = -1,
-	          l;
+	  function chooseAction(entityID) {
+	    var entity = context.entity(entityID);
+	    var geometry = entity.geometry(context.graph());
 
-	      if (str && str.length) {
-	        l = str.length;
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
+	    } else {
+	      _extent = _extent.extend(entity.extent(context.graph()));
+	    } // square a line/area
 
-	        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 (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 (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);
-	          }
+	        if (way.nodes.indexOf(entityID) !== -1) {
+	          return actionOrthogonalize(way.id, context.projection, entityID);
 	        }
 	      }
-
-	      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 += '';
+	    return null;
+	  }
 
-	        while (i < l) {
-	          c1 = str.charCodeAt(i);
-	          ac += 1;
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
-	          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 combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
 	        }
-	      }
-
-	      return arr.join('');
-	    }
-	    /**
-	     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-	     * to work around bugs in some JS interpreters.
-	     */
+	      });
 
+	      return graph;
+	    };
 
-	    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.
-	     */
+	    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 bit_rol(num, cnt) {
-	      return num << cnt | num >>> 32 - cnt;
-	    }
-	    /**
-	     * Convert a raw string to a hex string
-	     */
 
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	    function rstr2hex(input, hexcase) {
-	      var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-	          output = '',
-	          x,
-	          i = 0,
-	          l = input.length;
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
-	      for (; i < l; i += 1) {
-	        x = input.charCodeAt(i);
-	        output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be squared
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
 	      }
 
-	      return output;
+	      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';
 	    }
-	    /**
-	     * Convert an array of big-endian words to a string
-	     */
 
+	    return false;
 
-	    function binb2rstr(input) {
-	      var i,
-	          l = input.length * 32,
-	          output = '';
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	      for (i = 0; i < l; i += 8) {
-	        output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
+	      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 output;
+	      return false;
 	    }
-	    /**
-	     * Convert an array of little-endian words to a string
-	     */
-
+	  };
 
-	    function binl2rstr(input) {
-	      var i,
-	          l = input.length * 32,
-	          output = '';
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+	  };
 
-	      for (i = 0; i < l; i += 8) {
-	        output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-	      }
+	  operation.annotation = function () {
+	    return _t('operations.orthogonalize.annotation.' + _type, {
+	      n: _actions.length
+	    });
+	  };
 
-	      return output;
-	    }
-	    /**
-	     * Convert a raw string to an array of little-endian words
-	     * Characters >255 have their high-byte silently ignored.
-	     */
+	  operation.id = 'orthogonalize';
+	  operation.keys = [_t('operations.orthogonalize.key')];
+	  operation.title = _t('operations.orthogonalize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
+	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());
 
-	    function rstr2binl(input) {
-	      var i,
-	          l = input.length * 8,
-	          output = Array(input.length >> 2),
-	          lo = output.length;
+	  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
+	  };
 
-	      for (i = 0; i < lo; i += 1) {
-	        output[i] = 0;
-	      }
+	  operation.available = function () {
+	    return nodes.length >= 3;
+	  }; // don't cache this because the visible extent could change
 
-	      for (i = 0; i < l; i += 8) {
-	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
-	      }
 
-	      return output;
+	  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';
 	    }
-	    /**
-	     * Convert a raw string to an array of big-endian words
-	     * Characters >255 have their high-byte silently ignored.
-	     */
 
+	    return false;
 
-	    function rstr2binb(input) {
-	      var i,
-	          l = input.length * 8,
-	          output = Array(input.length >> 2),
-	          lo = output.length;
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	      for (i = 0; i < lo; i += 1) {
-	        output[i] = 0;
-	      }
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	      for (i = 0; i < l; i += 8) {
-	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
 	      }
 
-	      return output;
+	      return false;
 	    }
-	    /**
-	     * Convert a raw string to an arbitrary string encoding
-	     */
 
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	    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 */
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+	  };
 
-	      dividend = Array(Math.ceil(input.length / 2));
-	      ld = dividend.length;
+	  operation.annotation = function () {
+	    return _t('operations.reflect.annotation.' + axis + '.feature', {
+	      n: selectedIDs.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.
-	       */
+	  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;
+	}
 
+	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());
 
-	      while (dividend.length > 0) {
-	        quotient = Array();
-	        x = 0;
+	  var operation = function operation() {
+	    context.enter(modeMove(context, selectedIDs));
+	  };
 
-	        for (i = 0; i < dividend.length; i += 1) {
-	          x = (x << 16) + dividend[i];
-	          q = Math.floor(x / divisor);
-	          x -= q * divisor;
+	  operation.available = function () {
+	    return selectedIDs.length > 0;
+	  };
 
-	          if (quotient.length > 0 || q > 0) {
-	            quotient[quotient.length] = q;
-	          }
-	        }
+	  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';
+	    }
 
-	        remainders[remainders.length] = x;
-	        dividend = quotient;
-	      }
-	      /* Convert the remainders to the output string */
+	    return false;
 
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	      output = '';
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	      for (i = remainders.length - 1; i >= 0; i--) {
-	        output += encoding.charAt(remainders[i]);
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
 	      }
-	      /* Append leading zero equivalents */
 
+	      return false;
+	    }
 
-	      full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	      for (i = output.length; i < full_length; i += 1) {
-	        output = encoding[0] + output;
-	      }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+	  };
 
-	      return output;
-	    }
-	    /**
-	     * Convert a raw string to a base-64 string
-	     */
+	  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 rstr2b64(input, b64pad) {
-	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	          output = '',
-	          len = input.length,
-	          i,
-	          j,
-	          triplet;
-	      b64pad = b64pad || '=';
+	function modeRotate(context, entityIDs) {
+	  var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove
 
-	      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);
+	  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
+	  });
 
-	        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);
-	          }
-	        }
-	      }
+	  var _prevGraph;
 
-	      return output;
-	    }
+	  var _prevAngle;
 
-	    Hashes = {
-	      /**
-	       * @property {String} version
-	       * @readonly
-	       */
-	      VERSION: '1.0.6',
+	  var _prevTransform;
 
-	      /**
-	       * @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
+	  var _pivot; // use pointer events on supported platforms; fallback to mouse events
 
-	        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);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	            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);
-	              }
-	            }
-	          }
+	  function doRotate(d3_event) {
+	    var fn;
 
-	          return output;
-	        }; // public method for decoding
+	    if (context.graph() !== _prevGraph) {
+	      fn = context.perform;
+	    } else {
+	      fn = context.replace;
+	    } // projection changed, recalculate _pivot
 
 
-	        this.decode = function (input) {
-	          // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-	          var i,
-	              o1,
-	              o2,
-	              o3,
-	              h1,
-	              h2,
-	              h3,
-	              h4,
-	              bits,
-	              ac,
-	              dec = '',
-	              arr = [];
+	    var projection = context.projection;
+	    var currTransform = projection.transform();
 
-	          if (!input) {
-	            return input;
-	          }
+	    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;
+	    }
 
-	          i = ac = 0;
-	          input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-	          //input += '';
+	    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();
+	  }
 
-	          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;
+	  function getPivot(points) {
+	    var _pivot;
 
-	            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);
+	    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);
 
-	          dec = arr.join('');
-	          dec = utf8 ? utf8Decode(dec) : dec;
-	          return dec;
-	        }; // set custom pad string
+	      if (polygonHull.length === 2) {
+	        _pivot = geoVecInterp(points[0], points[1], 0.5);
+	      } else {
+	        _pivot = d3_polygonCentroid(d3_polygonHull(points));
+	      }
+	    }
 
+	    return _pivot;
+	  }
 
-	        this.setPad = function (str) {
-	          pad = str || pad;
-	          return this;
-	        }; // set custom tab string characters
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
+	  function cancel() {
+	    if (_prevGraph) context.pop(); // remove the rotate
 
-	        this.setTab = function (str) {
-	          tab = str || tab;
-	          return this;
-	        };
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
-	        this.setUTF8 = function (bool) {
-	          if (typeof bool === 'boolean') {
-	            utf8 = bool;
-	          }
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	          return this;
-	        };
-	      },
+	  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);
+	  };
 
-	      /**
-	       * 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;
+	  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([]);
+	  };
 
-	        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)
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
+	    return mode;
+	  };
 
-	        return (crc ^ -1) >>> 0;
-	      },
+	  return mode;
+	}
 
-	      /**
-	       * @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
+	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());
 
-	        this.hex = function (s) {
-	          return rstr2hex(rstr(s), hexcase);
-	        };
+	  var operation = function operation() {
+	    context.enter(modeRotate(context, selectedIDs));
+	  };
 
-	        this.b64 = function (s) {
-	          return rstr2b64(rstr(s), b64pad);
-	        };
+	  operation.available = function () {
+	    return nodes.length >= 2;
+	  };
 
-	        this.any = function (s, e) {
-	          return rstr2any(rstr(s), e);
-	        };
+	  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';
+	    }
 
-	        this.raw = function (s) {
-	          return rstr(s);
-	        };
+	    return false;
 
-	        this.hex_hmac = function (k, d) {
-	          return rstr2hex(rstr_hmac(k, d), hexcase);
-	        };
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	        this.b64_hmac = function (k, d) {
-	          return rstr2b64(rstr_hmac(k, d), b64pad);
-	        };
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        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
-	         */
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
+	      return false;
+	    }
 
-	        this.vm_test = function () {
-	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	        };
-	        /**
-	         * Enable/disable uppercase hexadecimal returned string
-	         * @param {Boolean}
-	         * @return {Object} this
-	         */
+	    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);
+	  };
 
-	        this.setUpperCase = function (a) {
-	          if (typeof a === 'boolean') {
-	            hexcase = a;
-	          }
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	          return this;
-	        };
-	        /**
-	         * Defines a base64 pad string
-	         * @param {String} Pad
-	         * @return {Object} 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 modeMove(context, entityIDs, baseGraph) {
+	  var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate
 
-	        this.setPad = function (a) {
-	          b64pad = a || b64pad;
-	          return this;
-	        };
-	        /**
-	         * Defines a base64 pad string
-	         * @param {Boolean}
-	         * @return {Object} [this]
-	         */
+	  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
+	  });
+
+	  var _prevGraph;
 
+	  var _cache;
 
-	        this.setUTF8 = function (a) {
-	          if (typeof a === 'boolean') {
-	            utf8 = a;
-	          }
+	  var _origin;
 
-	          return this;
-	        }; // private methods
+	  var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events
 
-	        /**
-	         * Calculate the MD5 of a raw string
-	         */
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        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)
-	         */
+	  function doMove(nudge) {
+	    nudge = nudge || [0, 0];
+	    var fn;
 
+	    if (_prevGraph !== context.graph()) {
+	      _cache = {};
+	      _origin = context.map().mouseCoordinates();
+	      fn = context.perform;
+	    } else {
+	      fn = context.overwrite;
+	    }
 
-	        function rstr_hmac(key, data) {
-	          var bkey, ipad, opad, hash, i;
-	          key = utf8 ? utf8Encode(key) : key;
-	          data = utf8 ? utf8Encode(data) : data;
-	          bkey = rstr2binl(key);
+	    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();
+	  }
 
-	          if (bkey.length > 16) {
-	            bkey = binl(bkey, key.length * 8);
-	          }
+	  function startNudge(nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(nudge);
+	    }, 50);
+	  }
 
-	          ipad = Array(16), opad = Array(16);
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
-	          for (i = 0; i < 16; i += 1) {
-	            ipad[i] = bkey[i] ^ 0x36363636;
-	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	          }
+	  function move() {
+	    doMove();
+	    var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-	          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.
-	         */
+	    if (nudge) {
+	      startNudge(nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	    stopNudge();
+	  }
 
-	        function binl(x, len) {
-	          var i,
-	              olda,
-	              oldb,
-	              oldc,
-	              oldd,
-	              a = 1732584193,
-	              b = -271733879,
-	              c = -1732584194,
-	              d = 271733878;
-	          /* append padding */
+	  function cancel() {
+	    if (baseGraph) {
+	      while (context.graph() !== baseGraph) {
+	        context.pop();
+	      } // reset to baseGraph
 
-	          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);
-	          }
+	      context.enter(modeBrowse(context));
+	    } else {
+	      if (_prevGraph) context.pop(); // remove the move
 
-	          return Array(a, b, c, d);
-	        }
-	        /**
-	         * These functions implement the four basic operations the algorithm uses.
-	         */
+	      context.enter(modeSelect(context, entityIDs));
+	    }
 
+	    stopNudge();
+	  }
 
-	        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 undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        function md5_ff(a, b, c, d, x, s, t) {
-	          return md5_cmn(b & c | ~b & d, a, b, x, s, t);
-	        }
+	  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);
+	  };
 
-	        function md5_gg(a, b, c, d, x, s, t) {
-	          return md5_cmn(b & d | c & ~d, a, b, x, s, t);
-	        }
+	  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([]);
+	  };
 
-	        function md5_hh(a, b, c, d, x, s, t) {
-	          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-	        }
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
-	        function md5_ii(a, b, c, d, x, s, t) {
-	          return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
-	        }
-	      },
+	    return mode;
+	  };
 
-	      /**
-	       * @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
+	  return mode;
+	}
 
-	        this.hex = function (s) {
-	          return rstr2hex(rstr(s), hexcase);
-	        };
+	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);
+	    });
 
-	        this.b64 = function (s) {
-	          return rstr2b64(rstr(s), b64pad);
-	        };
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	        this.any = function (s, e) {
-	          return rstr2any(rstr(s), e);
-	        };
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	        this.raw = function (s) {
-	          return rstr(s);
-	        };
 
-	        this.hex_hmac = function (k, d) {
-	          return rstr2hex(rstr_hmac(k, d));
-	        };
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	        this.b64_hmac = function (k, d) {
-	          return rstr2b64(rstr_hmac(k, d), b64pad);
-	        };
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Put pasted objects where mouse pointer is..
 
-	        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 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));
+	  }
 
-	        this.vm_test = function () {
-	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	        };
-	        /**
-	         * @description Enable/disable uppercase hexadecimal returned string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	  function behavior() {
+	    context.keybinding().on(uiCmd('⌘V'), doPaste);
+	    return behavior;
+	  }
 
+	  behavior.off = function () {
+	    context.keybinding().off(uiCmd('⌘V'));
+	  };
 
-	        this.setUpperCase = function (a) {
-	          if (typeof a === 'boolean') {
-	            hexcase = a;
-	          }
+	  return behavior;
+	}
 
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {string} Pad
-	         * @return {Object} this
-	         * @public
-	         */
+	/*
+	    `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.
+	 */
 
-	        this.setPad = function (a) {
-	          b64pad = a || b64pad;
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	function behaviorDrag() {
+	  var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect
 
+	  var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-	        this.setUTF8 = function (a) {
-	          if (typeof a === 'boolean') {
-	            utf8 = a;
-	          }
+	  var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-	          return this;
-	        }; // private methods
+	  var _origin = null;
+	  var _selector = '';
 
-	        /**
-	         * Calculate the SHA-512 of a raw string
-	         */
+	  var _targetNode;
 
+	  var _targetEntity;
 
-	        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)
-	         */
+	  var _surface;
 
+	  var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-	        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 (bkey.length > 16) {
-	            bkey = binb(bkey, key.length * 8);
-	          }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	          ipad = Array(16), opad = Array(16);
+	  var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-	          for (i = 0; i < 16; i += 1) {
-	            ipad[i] = bkey[i] ^ 0x36363636;
-	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	          }
+	  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);
+	    };
+	  };
 
-	          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 pointerdown(d3_event) {
+	    if (_pointerId) return;
+	    _pointerId = d3_event.pointerId || 'mouse';
+	    _targetNode = this; // only force reflow once per drag
 
+	    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);
 
-	        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 */
+	    if (_origin) {
+	      offset = _origin.call(_targetNode, _targetEntity);
+	      offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+	    } else {
+	      offset = [0, 0];
+	    }
 
-	          x[len >> 5] |= 0x80 << 24 - len % 32;
-	          x[(len + 64 >> 9 << 4) + 15] = len;
+	    d3_event.stopPropagation();
 
-	          for (i = 0; i < x.length; i += 16) {
-	            olda = a;
-	            oldb = b;
-	            oldc = c;
-	            oldd = d;
-	            olde = e;
+	    function pointermove(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var p = pointerLocGetter(d3_event);
 
-	            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);
-	              }
+	      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
 
-	              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;
-	            }
+	        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]);
+	      }
+	    }
 
-	            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);
-	          }
+	    function pointerup(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      _pointerId = null;
 
-	          return Array(a, b, c, d, e);
-	        }
-	        /**
-	         * Perform the appropriate triplet combination function for the current
-	         * iteration
-	         */
+	      if (started) {
+	        dispatch.call('end', this, d3_event, _targetEntity);
+	        d3_event.preventDefault();
+	      }
+
+	      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 sha1_ft(t, b, c, d) {
-	          if (t < 20) {
-	            return b & c | ~b & d;
-	          }
+	    if (_selector) {
+	      delegate = function delegate(d3_event) {
+	        var root = this;
+	        var target = d3_event.target;
 
-	          if (t < 40) {
-	            return b ^ c ^ d;
-	          }
+	        for (; target && target !== root; target = target.parentNode) {
+	          var datum = target.__data__;
+	          _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-	          if (t < 60) {
-	            return b & c | b & d | c & d;
+	          if (_targetEntity && target[matchesSelector](_selector)) {
+	            return pointerdown.call(target, d3_event);
 	          }
-
-	          return b ^ c ^ d;
 	        }
-	        /**
-	         * Determine the appropriate additive constant for the current iteration
-	         */
+	      };
+	    }
 
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	  }
 
-	        function sha1_kt(t) {
-	          return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
-	        }
-	      },
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+	  };
 
-	      /**
-	       * @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
-	         */
-	        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 : '=',
+	  behavior.selector = function (_) {
+	    if (!arguments.length) return _selector;
+	    _selector = _;
+	    return behavior;
+	  };
 
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+	  behavior.origin = function (_) {
+	    if (!arguments.length) return _origin;
+	    _origin = _;
+	    return behavior;
+	  };
 
-	        /* enable/disable utf8 encoding */
-	        sha256_K;
-	        /* privileged (public) methods */
+	  behavior.cancel = function () {
+	    select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	    return behavior;
+	  };
 
-	        this.hex = function (s) {
-	          return rstr2hex(rstr(s, utf8));
-	        };
+	  behavior.targetNode = function (_) {
+	    if (!arguments.length) return _targetNode;
+	    _targetNode = _;
+	    return behavior;
+	  };
 
-	        this.b64 = function (s) {
-	          return rstr2b64(rstr(s, utf8), b64pad);
-	        };
+	  behavior.targetEntity = function (_) {
+	    if (!arguments.length) return _targetEntity;
+	    _targetEntity = _;
+	    return behavior;
+	  };
 
-	        this.any = function (s, e) {
-	          return rstr2any(rstr(s, utf8), e);
-	        };
+	  behavior.surface = function (_) {
+	    if (!arguments.length) return _surface;
+	    _surface = _;
+	    return behavior;
+	  };
 
-	        this.raw = function (s) {
-	          return rstr(s, utf8);
-	        };
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	        this.hex_hmac = function (k, d) {
-	          return rstr2hex(rstr_hmac(k, d));
-	        };
+	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);
 
-	        this.b64_hmac = function (k, d) {
-	          return rstr2b64(rstr_hmac(k, d), b64pad);
-	        };
+	  var _nudgeInterval;
 
-	        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 _restoreSelectedIDs = [];
+	  var _wasMidpoint = false;
+	  var _isCancelled = false;
 
+	  var _activeEntity;
 
-	        this.vm_test = function () {
-	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	        };
-	        /**
-	         * Enable/disable uppercase hexadecimal returned string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	  var _startLoc;
 
+	  var _lastLoc;
 
-	        this.setUpperCase = function (a) {
-	          if (typeof a === 'boolean') {
-	            hexcase = a;
-	          }
+	  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);
+	  }
 
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {string} Pad
-	         * @return {Object} this
-	         * @public
-	         */
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
+	  function moveAnnotation(entity) {
+	    return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+	  }
 
-	        this.setPad = function (a) {
-	          b64pad = a || b64pad;
-	          return this;
-	        };
-	        /**
-	         * Defines a base64 pad string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	  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
 
-	        this.setUTF8 = function (a) {
-	          if (typeof a === 'boolean') {
-	            utf8 = a;
-	          }
+	      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 this;
-	        }; // private methods
+	        return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+	      }
+	    }
 
-	        /**
-	         * Calculate the SHA-512 of a raw string
-	         */
+	    return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+	  }
 
+	  function shouldSnapToNode(target) {
+	    if (!_activeEntity) return false;
+	    return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+	  }
 
-	        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)
-	         */
+	  function origin(entity) {
+	    return context.projection(entity.loc);
+	  }
 
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	        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);
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
-	          if (bkey.length > 16) {
-	            bkey = binb(bkey, key.length * 8);
-	          }
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	          for (; i < 16; i += 1) {
-	            ipad[i] = bkey[i] ^ 0x36363636;
-	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	          }
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
-	          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
-	         */
+	  function start(d3_event, entity) {
+	    _wasMidpoint = entity.type === 'midpoint';
+	    var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+	    _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
+	    if (_isCancelled) {
+	      if (hasHidden) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+	      }
 
-	        function sha256_S(X, n) {
-	          return X >>> n | X << 32 - n;
-	        }
+	      return drag.cancel();
+	    }
 
-	        function sha256_R(X, n) {
-	          return X >>> n;
-	        }
+	    if (_wasMidpoint) {
+	      var midpoint = entity;
+	      entity = osmNode();
+	      context.perform(actionAddMidpoint(midpoint, entity));
+	      entity = context.entity(entity.id); // get post-action entity
 
-	        function sha256_Ch(x, y, z) {
-	          return x & y ^ ~x & z;
-	        }
+	      var vertex = context.surface().selectAll('.' + entity.id);
+	      drag.targetNode(vertex.node()).targetEntity(entity);
+	    } else {
+	      context.perform(actionNoop());
+	    }
 
-	        function sha256_Maj(x, y, z) {
-	          return x & y ^ x & z ^ y & z;
-	        }
+	    _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()`
 
-	        function sha256_Sigma0256(x) {
-	          return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
-	        }
 
-	        function sha256_Sigma1256(x) {
-	          return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
-	        }
+	  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 sha256_Gamma0256(x) {
-	          return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
-	        }
+	  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;
 
-	        function sha256_Gamma1256(x) {
-	          return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+	    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);
 
-	        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];
+	        if (edge) {
+	          loc = edge.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 */
+	    context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-	          m[l >> 5] |= 0x80 << 24 - l % 32;
-	          m[(l + 64 >> 9 << 4) + 15] = l;
+	    var isInvalid = false; // Check if this connection to `target` could cause relations to break..
 
-	          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];
+	    if (target) {
+	      isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+	    } // Check if this drag causes the geometry to break..
 
-	            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);
-	            }
+	    if (!isInvalid) {
+	      isInvalid = hasInvalidGeometry(entity, context.graph());
+	    }
 
-	            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]);
-	          }
+	    var nope = context.surface().classed('nope');
 
-	          return HASH;
-	        }
-	      },
+	    if (isInvalid === 'relation' || isInvalid === 'restriction') {
+	      if (!nope) {
+	        // about to nope - show hint
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('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.html('self_intersection.error.' + errorID))();
+	    } else {
+	      if (nope) {
+	        // about to un-nope, remove hint
+	        context.ui().flash.duration(1).label('')();
+	      }
+	    }
 
-	      /**
-	       * @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
-	         */
-	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	    var nopeDisabled = context.surface().classed('nope-disabled');
 
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+	    }
 
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+	    _lastLoc = loc;
+	  } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
-	        /* enable/disable utf8 encoding */
-	        sha512_k;
-	        /* privileged (public) methods */
 
-	        this.hex = function (s) {
-	          return rstr2hex(rstr(s));
-	        };
+	  function hasRelationConflict(entity, target, edge, graph) {
+	    var testGraph = graph.update(); // copy
+	    // if snapping to way - add midpoint there and consider that the target..
 
-	        this.b64 = function (s) {
-	          return rstr2b64(rstr(s), b64pad);
-	        };
+	    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?
 
-	        this.any = function (s, e) {
-	          return rstr2any(rstr(s), e);
-	        };
 
-	        this.raw = function (s) {
-	          return rstr(s);
-	        };
+	    var ids = [entity.id, target.id];
+	    return actionConnect(ids).disabled(testGraph);
+	  }
 
-	        this.hex_hmac = function (k, d) {
-	          return rstr2hex(rstr_hmac(k, d));
-	        };
+	  function hasInvalidGeometry(entity, graph) {
+	    var parents = graph.parentWays(entity);
+	    var i, j, k;
 
-	        this.b64_hmac = function (k, d) {
-	          return rstr2b64(rstr_hmac(k, d), b64pad);
-	        };
+	    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
 
-	        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 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
 
-	        this.vm_test = function () {
-	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	        };
-	        /**
-	         * @description Enable/disable uppercase hexadecimal returned string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	        for (k = 0; k < rings.length; k++) {
+	          nodes = rings[k].nodes;
 
+	          if (nodes.find(function (n) {
+	            return n.id === entity.id;
+	          })) {
+	            activeIndex = k;
 
-	        this.setUpperCase = function (a) {
-	          if (typeof a === 'boolean') {
-	            hexcase = a;
+	            if (geoHasSelfIntersections(nodes, entity.id)) {
+	              return 'multipolygonMember';
+	            }
 	          }
 
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {string} Pad
-	         * @return {Object} this
-	         * @public
-	         */
-
+	          rings[k].coords = nodes.map(function (n) {
+	            return n.loc;
+	          });
+	        } // test active ring for intersections with other rings in the multipolygon
 
-	        this.setPad = function (a) {
-	          b64pad = a || b64pad;
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
 
+	        for (k = 0; k < rings.length; k++) {
+	          if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-	        this.setUTF8 = function (a) {
-	          if (typeof a === 'boolean') {
-	            utf8 = a;
+	          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.
 
-	          return this;
-	        };
-	        /* private methods */
-
-	        /**
-	         * Calculate the SHA-512 of a raw string
-	         */
 
+	      if (activeIndex === null) {
+	        nodes = parent.nodes.map(function (nodeID) {
+	          return graph.entity(nodeID);
+	        });
 
-	        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)
-	         */
+	        if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+	          return parent.geometry(graph);
+	        }
+	      }
+	    }
 
+	    return false;
+	  }
 
-	        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);
+	  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());
 
-	          if (bkey.length > 32) {
-	            bkey = binb(bkey, key.length * 8);
-	          }
+	    if (nudge) {
+	      startNudge(d3_event, entity, nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
-	          for (; i < 32; i += 1) {
-	            ipad[i] = bkey[i] ^ 0x36363636;
-	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	          }
+	  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
 
-	          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
-	         */
+	    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));
+	    }
 
+	    if (wasPoint) {
+	      context.enter(modeSelect(context, [entity.id]));
+	    } else {
+	      var reselection = _restoreSelectedIDs.filter(function (id) {
+	        return context.graph().hasEntity(id);
+	      });
 
-	        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 (reselection.length) {
+	        context.enter(modeSelect(context, reselection));
+	      } else {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
+	  }
 
-	          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)];
-	          }
+	  function _actionBounceBack(nodeID, toLoc) {
+	    var moveNode = actionMoveNode(nodeID, toLoc);
 
-	          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.
+	    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);
+	    };
 
+	    action.transitionable = true;
+	    return action;
+	  }
 
-	          x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
-	          x[(len + 128 >> 10 << 5) + 31] = len;
-	          l = x.length;
+	  function cancel() {
+	    drag.cancel();
+	    context.enter(modeBrowse(context));
+	  }
 
-	          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]);
+	  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);
 
-	            for (j = 0; j < 16; j += 1) {
-	              W[j].h = x[i + 2 * j];
-	              W[j].l = x[i + 2 * j + 1];
-	            }
+	  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);
+	  };
 
-	            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
+	  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();
+	  };
 
-	              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]);
-	            }
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-	            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
+	    return mode;
+	  };
 
-	              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
+	  mode.activeID = function () {
+	    if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
-	              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
+	    return mode;
+	  };
 
-	              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);
-	            }
+	  mode.restoreSelectedIDs = function (_) {
+	    if (!arguments.length) return _restoreSelectedIDs;
+	    _restoreSelectedIDs = _;
+	    return mode;
+	  };
 
-	            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
+	  mode.behavior = drag;
+	  return mode;
+	}
 
+	var $$3 = _export;
+	var NativePromise = nativePromiseConstructor;
+	var fails$1 = fails$V;
+	var getBuiltIn = getBuiltIn$b;
+	var isCallable = isCallable$r;
+	var speciesConstructor = speciesConstructor$5;
+	var promiseResolve = promiseResolve$2;
+	var redefine$1 = redefine$h.exports;
 
-	          for (i = 0; i < 8; i += 1) {
-	            hash[2 * i] = H[i].h;
-	            hash[2 * i + 1] = H[i].l;
-	          }
+	// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+	var NON_GENERIC = !!NativePromise && fails$1(function () {
+	  // eslint-disable-next-line unicorn/no-thenable -- required for testing
+	  NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+	});
 
-	          return hash;
-	        } //A constructor for 64-bit numbers
+	// `Promise.prototype.finally` method
+	// https://tc39.es/ecma262/#sec-promise.prototype.finally
+	$$3({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+	  'finally': function (onFinally) {
+	    var C = speciesConstructor(this, getBuiltIn('Promise'));
+	    var isFunction = isCallable(onFinally);
+	    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 (isCallable(NativePromise)) {
+	  var method = getBuiltIn('Promise').prototype['finally'];
+	  if (NativePromise.prototype['finally'] !== method) {
+	    redefine$1(NativePromise.prototype, 'finally', method, { unsafe: true });
+	  }
+	}
 
-	        function int64(h, l) {
-	          this.h = h;
-	          this.l = l; //this.toString = int64toString;
-	        } //Copies src into dst, assuming both are 64-bit numbers
+	function quickselect(arr, k, left, right, compare) {
+	  quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	}
 
+	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);
+	    }
 
-	        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 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--;
 
-	        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
+	      while (compare(arr[i], t) < 0) {
+	        i++;
+	      }
 
+	      while (compare(arr[j], t) > 0) {
+	        j--;
+	      }
+	    }
 
-	        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
+	    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;
+	  }
+	}
 
+	function swap(arr, i, j) {
+	  var tmp = arr[i];
+	  arr[i] = arr[j];
+	  arr[j] = tmp;
+	}
 
-	        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
+	function defaultCompare(a, b) {
+	  return a < b ? -1 : a > b ? 1 : 0;
+	}
 
+	var RBush = /*#__PURE__*/function () {
+	  function RBush() {
+	    var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
-	        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.
+	    _classCallCheck$1(this, RBush);
 
+	    // 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();
+	  }
 
-	        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
+	  _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;
 
-	        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 (intersects(bbox, childBBox)) {
+	            if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+	          }
 	        }
-	      },
 
-	      /**
-	       * @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
-	         */
-	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	        node = nodesToSearch.pop();
+	      }
 
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
+	      return result;
+	    }
+	  }, {
+	    key: "collides",
+	    value: function collides(bbox) {
+	      var node = this.data;
+	      if (!intersects(bbox, node)) return false;
+	      var nodesToSearch = [];
 
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? this.toBBox(child) : child;
 
-	        /* 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 */
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf || contains(bbox, childBBox)) return true;
+	            nodesToSearch.push(child);
+	          }
+	        }
 
-	        this.hex = function (s) {
-	          return rstr2hex(rstr(s));
-	        };
+	        node = nodesToSearch.pop();
+	      }
 
-	        this.b64 = function (s) {
-	          return rstr2b64(rstr(s), b64pad);
-	        };
+	      return false;
+	    }
+	  }, {
+	    key: "load",
+	    value: function load(data) {
+	      if (!(data && data.length)) return this;
 
-	        this.any = function (s, e) {
-	          return rstr2any(rstr(s), e);
-	        };
+	      if (data.length < this._minEntries) {
+	        for (var i = 0; i < data.length; i++) {
+	          this.insert(data[i]);
+	        }
 
-	        this.raw = function (s) {
-	          return rstr(s);
-	        };
+	        return this;
+	      } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	        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);
-	        };
+	      var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	        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
-	         */
+	      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
 
 
-	        this.vm_test = function () {
-	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	        };
-	        /**
-	         * @description Enable/disable uppercase hexadecimal returned string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	        this._insert(node, this.data.height - node.height - 1, true);
+	      }
+
+	      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;
+	        }
 
-	        this.setUpperCase = function (a) {
-	          if (typeof a === 'boolean') {
-	            hexcase = a;
-	          }
+	        if (node.leaf) {
+	          // check current node
+	          var index = findItem(item, node.children, equalsFn);
 
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {string} Pad
-	         * @return {Object} this
-	         * @public
-	         */
+	          if (index !== -1) {
+	            // item found, remove the item and condense tree upwards
+	            node.children.splice(index, 1);
+	            path.push(node);
 
+	            this._condense(path);
 
-	        this.setPad = function (a) {
-	          if (typeof a !== 'undefined') {
-	            b64pad = a;
+	            return this;
 	          }
+	        }
 
-	          return this;
-	        };
-	        /**
-	         * @description Defines a base64 pad string
-	         * @param {boolean}
-	         * @return {Object} this
-	         * @public
-	         */
+	        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
 
+	      }
 
-	        this.setUTF8 = function (a) {
-	          if (typeof a === 'boolean') {
-	            utf8 = a;
-	          }
+	      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 = [];
 
-	          return this;
-	        };
-	        /* private methods */
+	      while (node) {
+	        if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+	        node = nodesToSearch.pop();
+	      }
 
-	        /**
-	         * Calculate the rmd160 of a raw string
-	         */
+	      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;
+	      }
 
-	        function rstr(s) {
-	          s = utf8 ? utf8Encode(s) : s;
-	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
-	        }
-	        /**
-	         * Calculate the HMAC-rmd160 of a key and some data (raw strings)
-	         */
+	      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));
+	      }
 
-	        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);
+	      node = createNode([]);
+	      node.leaf = false;
+	      node.height = height; // split the items into M mostly square tiles
 
-	          if (bkey.length > 16) {
-	            bkey = binl(bkey, key.length * 8);
-	          }
+	      var N2 = Math.ceil(N / M);
+	      var N1 = N2 * Math.ceil(Math.sqrt(M));
+	      multiSelect(items, left, right, N1, this.compareMinX);
 
-	          for (i = 0; i < 16; i += 1) {
-	            ipad[i] = bkey[i] ^ 0x36363636;
-	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	          }
+	      for (var i = left; i <= right; i += N1) {
+	        var right2 = Math.min(i + N1 - 1, right);
+	        multiSelect(items, i, right2, N2, this.compareMinY);
 
-	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	          return binl2rstr(binl(opad.concat(hash), 512 + 160));
+	        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));
 	        }
-	        /**
-	         * Convert an array of little-endian words to a string
-	         */
+	      }
 
+	      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;
 
-	        function binl2rstr(input) {
-	          var i,
-	              output = '',
-	              l = input.length * 32;
+	        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
 
-	          for (i = 0; i < l; i += 8) {
-	            output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	          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;
+	            }
 	          }
-
-	          return output;
 	        }
-	        /**
-	         * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-	         */
 
+	        node = targetNode || node.children[0];
+	      }
 
-	        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 */
+	      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
 
-	          x[len >> 5] |= 0x80 << len % 32;
-	          x[(len + 64 >>> 9 << 4) + 14] = len;
-	          l = x.length;
+	      var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	          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;
-	            }
+	      node.children.push(item);
+	      extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	            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;
-	          }
+	      while (level >= 0) {
+	        if (insertPath[level].children.length > this._maxEntries) {
+	          this._split(insertPath, level);
 
-	          return [h0, h1, h2, h3, h4];
-	        } // specific algorithm methods
+	          level--;
+	        } else break;
+	      } // adjust bboxes along the insertion path
 
 
-	        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';
-	        }
+	      this._adjustParentBBoxes(bbox, insertPath, level);
+	    } // split overflowed node into two
 
-	        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';
-	        }
+	  }, {
+	    key: "_split",
+	    value: function _split(insertPath, level) {
+	      var node = insertPath[level];
+	      var M = node.children.length;
+	      var m = this._minEntries;
 
-	        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';
-	        }
-	      }
-	    }; // exposes Hashes
+	      this._chooseSplitAxis(node, m, M);
 
-	    (function (window, undefined$1) {
-	      var freeExports = false;
+	      var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	      {
-	        freeExports = exports;
+	      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;
 
-	        if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-	          window = commonjsGlobal;
-	        }
-	      }
+	      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 (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;
+	        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;
 	          }
-	      } else {
-	        // in a browser or Rhino
-	        window.Hashes = Hashes;
+	        }
 	      }
-	    })(this);
-	  })(); // IIFE
-
-	});
 
-	var immutable = extend$2;
-	var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
+	      return index || M - m;
+	    } // sorts node children by the best axis for split
 
-	function extend$2() {
-	  var target = {};
+	  }, {
+	    key: "_chooseSplitAxis",
+	    value: function _chooseSplitAxis(node, m, M) {
+	      var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+	      var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-	  for (var i = 0; i < arguments.length; i++) {
-	    var source = arguments[i];
+	      var xMargin = this._allDistMargin(node, m, M, compareMinX);
 
-	    for (var key in source) {
-	      if (hasOwnProperty$2.call(source, key)) {
-	        target[key] = source[key];
-	      }
-	    }
-	  }
+	      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
 
-	  return target;
-	}
 
-	var sha1 = new hashes.SHA1();
-	var ohauth = {};
+	      if (xMargin < yMargin) node.children.sort(compareMinX);
+	    } // total margin of all possible split distributions where each node is at least m full
 
-	ohauth.qsString = function (obj) {
-	  return Object.keys(obj).sort().map(function (key) {
-	    return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
-	  }).join('&');
-	};
+	  }, {
+	    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);
 
-	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;
-	  }, {});
-	};
+	      for (var i = m; i < M - m; i++) {
+	        var child = node.children[i];
+	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+	        margin += bboxMargin(leftBBox);
+	      }
 
-	ohauth.rawxhr = function (method, url, data, headers, callback) {
-	  var xhr = new XMLHttpRequest(),
-	      twoHundred = /^20\d$/;
+	      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);
+	      }
 
-	  xhr.onreadystatechange = function () {
-	    if (4 === xhr.readyState && 0 !== xhr.status) {
-	      if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
+	      return margin;
 	    }
-	  };
-
-	  xhr.onerror = function (e) {
-	    return callback(e, null);
-	  };
-
-	  xhr.open(method, url, true);
-
-	  for (var h in headers) {
-	    xhr.setRequestHeader(h, headers[h]);
-	  }
+	  }, {
+	    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);
+	      }
+	    }
+	  }]);
 
-	  xhr.send(data);
-	  return xhr;
-	};
+	  return RBush;
+	}();
 
-	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);
-	};
+	function findItem(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	ohauth.nonce = function () {
-	  for (var o = ''; o.length < 6;) {
-	    o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
 	  }
 
-	  return o;
-	};
-
-	ohauth.authHeader = function (obj) {
-	  return Object.keys(obj).sort().map(function (key) {
-	    return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-	  }).join(', ');
-	};
-
-	ohauth.timestamp = function () {
-	  return ~~(+new Date() / 1000);
-	};
-
-	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('&');
-	};
-
-	ohauth.signature = function (oauth_secret, token_secret, baseString) {
-	  return sha1.b64_hmac(ohauth.percentEncode(oauth_secret) + '&' + ohauth.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.
-	 */
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
 
-	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 || '';
-	  return function (method, uri, extra_params) {
-	    method = method.toUpperCase();
+	function calcBBox(node, toBBox) {
+	  distBBox(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	    if (typeof extra_params === 'string' && extra_params.length > 0) {
-	      extra_params = ohauth.stringQs(extra_params);
-	    }
 
-	    var uri_parts = uri.split('?', 2),
-	        base_uri = uri_parts[0];
-	    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()
-	    };
-	    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);
-	    oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
-	    return 'OAuth ' + ohauth.authHeader(oauth_params);
-	  };
-	};
+	function distBBox(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	var ohauth_1 = ohauth;
+	  for (var i = k; i < p; i++) {
+	    var child = node.children[i];
+	    extend$1(destNode, node.leaf ? toBBox(child) : child);
+	  }
 
-	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 () {
-	    function resolveUrl()
-	    /* ...urls */
-	    {
-	      var numUrls = arguments.length;
+	  return destNode;
+	}
 
-	      if (numUrls === 0) {
-	        throw new Error("resolveUrl requires at least one argument; got none.");
-	      }
+	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;
+	}
 
-	      var base = document.createElement("base");
-	      base.href = arguments[0];
+	function compareNodeMinX(a, b) {
+	  return a.minX - b.minX;
+	}
 
-	      if (numUrls === 1) {
-	        return base.href;
-	      }
+	function compareNodeMinY(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	      var head = document.getElementsByTagName("head")[0];
-	      head.insertBefore(base, head.firstChild);
-	      var a = document.createElement("a");
-	      var resolved;
+	function bboxArea(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	      for (var index = 1; index < numUrls; index++) {
-	        a.href = arguments[index];
-	        resolved = a.href;
-	        base.href = resolved;
-	      }
+	function bboxMargin(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	      head.removeChild(base);
-	      return resolved;
-	    }
+	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));
+	}
 
-	    return resolveUrl;
-	  });
-	});
+	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);
+	}
 
-	var assign = make_assign();
-	var create$1 = make_create();
-	var trim$3 = make_trim();
-	var Global = typeof window !== 'undefined' ? window : commonjsGlobal;
-	var util = {
-	  assign: assign,
-	  create: create$1,
-	  trim: trim$3,
-	  bind: bind$1,
-	  slice: slice$2,
-	  each: each,
-	  map: map$1,
-	  pluck: pluck,
-	  isList: isList,
-	  isFunction: isFunction,
-	  isObject: isObject$2,
-	  Global: Global
-	};
+	function contains(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
 
-	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(Object(arguments[i]), function (val, key) {
-	          obj[key] = val;
-	        });
-	      }
+	function intersects(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	      return obj;
-	    };
+	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
+
+
+	function multiSelect(arr, left, right, n, compare) {
+	  var stack = [left, right];
+
+	  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);
 	  }
 	}
 
-	function make_create() {
-	  if (Object.create) {
-	    return function create(obj, assignProps1, assignProps2, etc) {
-	      var assignArgsList = slice$2(arguments, 1);
-	      return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
-	    };
-	  } else {
-	    var F = function F() {}; // eslint-disable-line no-inner-declarations
+	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);
+	}
 
-	    return function create(obj, assignProps1, assignProps2, etc) {
-	      var assignArgsList = slice$2(arguments, 1);
-	      F.prototype = obj;
-	      return assign.apply(this, [new F()].concat(assignArgsList));
-	    };
-	  }
+	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 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, '');
-	    };
-	  }
+	function d3_json (input, init) {
+	  return fetch(input, init).then(responseJson);
 	}
 
-	function bind$1(obj, fn) {
-	  return function () {
-	    return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+	function parser(type) {
+	  return function (input, init) {
+	    return d3_text(input, init).then(function (text) {
+	      return new DOMParser().parseFromString(text, type);
+	    });
 	  };
 	}
 
-	function slice$2(arr, index) {
-	  return Array.prototype.slice.call(arr, index || 0);
+	var d3_xml = parser("application/xml");
+	var svg = parser("image/svg+xml");
+
+	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
+
+	var _cache$2;
+
+	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();
+	  }
 	}
 
-	function each(obj, fn) {
-	  pluck(obj, function (val, key) {
-	    fn(val, key);
-	    return false;
+	function abortUnwantedRequests$3(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
+
+	    if (!wanted) {
+	      abortRequest$6(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
 	  });
 	}
 
-	function map$1(obj, fn) {
-	  var res = isList(obj) ? [] : {};
-	  pluck(obj, function (v, k) {
-	    res[k] = fn(v, k);
-	    return false;
+	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
+
+
+	function updateRtree$3(item, replace) {
+	  _cache$2.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
 	  });
-	  return res;
-	}
 
-	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];
-	        }
-	      }
-	    }
+	  if (replace) {
+	    _cache$2.rtree.insert(item);
 	  }
 	}
 
-	function isList(val) {
-	  return val != null && typeof val != 'function' && typeof val.length == 'number';
-	}
+	function tokenReplacements(d) {
+	  if (!(d instanceof QAItem)) return;
+	  var replacements = {};
+	  var issueTemplate = _krData.errorTypes[d.whichType];
 
-	function isFunction(val) {
-	  return val && {}.toString.call(val) === '[object Function]';
-	}
+	  if (!issueTemplate) {
+	    /* eslint-disable no-console */
+	    console.log('No Template: ', d.whichType);
+	    console.log('  ', d.description);
+	    /* eslint-enable no-console */
 
-	function isObject$2(val) {
-	  return val && {}.toString.call(val) === '[object Object]';
-	}
+	    return;
+	  } // some descriptions are just fixed text
 
-	var slice$3 = util.slice;
-	var pluck$1 = util.pluck;
-	var each$1 = util.each;
-	var bind$2 = util.bind;
-	var create$2 = util.create;
-	var isList$1 = util.isList;
-	var isFunction$1 = util.isFunction;
-	var isObject$3 = util.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);
-	  }
-	};
+	  if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-	function _warn() {
-	  var _console = typeof console == 'undefined' ? null : console;
+	  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 */
 
-	  if (!_console) {
 	    return;
 	  }
 
-	  var fn = _console.warn ? _console.warn : _console.log;
-	  fn.apply(_console, arguments);
-	}
+	  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 _createStore(storages, plugins, namespace) {
-	  if (!namespace) {
-	    namespace = '';
-	  }
+	    if (idType && capture) {
+	      // link IDs if present in the capture
+	      capture = parseError(capture, idType);
+	    } else {
+	      var compare = capture.toLowerCase();
 
-	  if (storages && !isList$1(storages)) {
-	    storages = [storages];
-	  }
+	      if (_krData.localizeStrings[compare]) {
+	        // some replacement strings can be localized
+	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	      } else {
+	        capture = unescape$3(capture);
+	      }
+	    }
 
-	  if (plugins && !isList$1(plugins)) {
-	    plugins = [plugins];
+	    replacements['var' + i] = capture;
 	  }
 
-	  var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
-	  var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
-	  var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
+	  return replacements;
+	}
 
-	  if (!legalNamespaces.test(namespace)) {
-	    throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+	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]);
 	  }
 
-	  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;
-	      }
-	    },
-	    _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
-	      var oldFn = this[propName];
+	  switch (idType) {
+	    // link a string like "this node"
+	    case 'this':
+	      capture = linkErrorObject(capture);
+	      break;
 
-	      this[propName] = function pluginFn() {
-	        var args = slice$3(arguments, 0);
-	        var self = this; // super_fn calls the old function which was overwritten by
-	        // this mixin.
+	    case 'url':
+	      capture = linkURL(capture);
+	      break;
+	    // link an entity ID
 
-	        function super_fn() {
-	          if (!oldFn) {
-	            return;
-	          }
+	    case 'n':
+	    case 'w':
+	    case 'r':
+	      capture = linkEntity(idType + capture);
+	      break;
+	    // some errors have more complex ID lists/variance
 
-	          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.
+	    case '20':
+	      capture = parse20(capture);
+	      break;
 
+	    case '211':
+	      capture = parse211(capture);
+	      break;
 
-	        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
+	    case '231':
+	      capture = parse231(capture);
+	      break;
 
+	    case '294':
+	      capture = parse294(capture);
+	      break;
 
-	      var val = '';
+	    case '370':
+	      capture = parse370(capture);
+	      break;
+	  }
 
-	      try {
-	        val = JSON.parse(strVal);
-	      } catch (e) {
-	        val = strVal;
-	      }
+	  return capture;
 
-	      return val !== undefined ? val : defaultVal;
-	    },
-	    _addStorage: function _addStorage(storage) {
-	      if (this.enabled) {
-	        return;
-	      }
+	  function linkErrorObject(d) {
+	    return {
+	      html: "<a class=\"error_object_link\">".concat(d, "</a>")
+	    };
+	  }
 
-	      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.
+	  function linkEntity(d) {
+	    return {
+	      html: "<a class=\"error_entity_link\">".concat(d, "</a>")
+	    };
+	  }
 
-	      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.
+	  function linkURL(d) {
+	    return {
+	      html: "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>")
+	    };
+	  } // arbitrary node list of form: #ID, #ID, #ID...
 
 
-	      var seenPlugin = pluck$1(this.plugins, function (seenPlugin) {
-	        return plugin === seenPlugin;
-	      });
+	  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)...
 
-	      if (seenPlugin) {
-	        return;
-	      }
 
-	      this.plugins.push(plugin); // Check that the plugin is properly formed
+	  function parse231(capture) {
+	    var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-	      if (!isFunction$1(plugin)) {
-	        throw new Error('Plugins must be function values that return objects');
+	    var items = capture.split('),');
+	    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]
+	        }));
 	      }
+	    });
+	    return newList.join(', ');
+	  } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
 
-	      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.
+	  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
 
+	      var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
-	      each$1(pluginProperties, function (pluginFnProp, propName) {
-	        if (!isFunction$1(pluginFnProp)) {
-	          throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
-	        }
+	      var idType = item[1].slice(0, 1); // ID has # at the front
 
-	        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])');
+	      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')"
 
-	      this._addStorage(storage);
-	    }
-	  };
-	  var store = create$2(_privateStoreProps, storeAPI, {
-	    plugins: []
-	  });
-	  store.raw = {};
-	  each$1(store, function (prop, propName) {
-	    if (isFunction$1(prop)) {
-	      store.raw[propName] = bind$2(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 localStorage_1 = {
-	  name: 'localStorage',
-	  read: read,
-	  write: write,
-	  each: each$2,
-	  remove: remove$2,
-	  clearAll: clearAll
-	};
+	  function parse370(capture) {
+	    if (!capture) return '';
+	    var match = capture.match(/\(including the name (\'.+\')\)/);
 
-	function localStorage$1() {
-	  return Global$1.localStorage;
-	}
+	    if (match && match.length) {
+	      return _t('QA.keepRight.errorTypes.370.including_the_name', {
+	        name: match[1]
+	      });
+	    }
 
-	function read(key) {
-	  return localStorage$1().getItem(key);
-	}
+	    return '';
+	  } // arbitrary node list of form: #ID,#ID,#ID...
 
-	function write(key, data) {
-	  return localStorage$1().setItem(key, data);
-	}
 
-	function each$2(fn) {
-	  for (var i = localStorage$1().length - 1; i >= 0; i--) {
-	    var key = localStorage$1().key(i);
-	    fn(read(key), key);
+	  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 remove$2(key) {
-	  return localStorage$1().removeItem(key);
-	}
-
-	function clearAll() {
-	  return localStorage$1().clear();
-	}
+	var serviceKeepRight = {
+	  title: 'keepRight',
+	  init: function init() {
+	    _mainFileFetcher.get('keepRight').then(function (d) {
+	      return _krData = d;
+	    });
 
-	// versions 6 and 7, where no localStorage, etc
-	// is available.
+	    if (!_cache$2) {
+	      this.reset();
+	    }
 
-	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 globalStorage = Global$2.globalStorage;
+	    this.event = utilRebind(this, dispatch$7, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$2) {
+	      Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
+	    }
 
-	function read$1(key) {
-	  return globalStorage[key];
-	}
+	    _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;
 
-	function write$1(key, data) {
-	  globalStorage[key] = data;
-	}
+	    var options = {
+	      format: 'geojson',
+	      ch: _krRuleset
+	    }; // determine the needed tiles to cover the view
 
-	function each$3(fn) {
-	  for (var i = globalStorage.length - 1; i >= 0; i--) {
-	    var key = globalStorage.key(i);
-	    fn(globalStorage[key], key);
-	  }
-	}
+	    var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	function remove$3(key) {
-	  return globalStorage.removeItem(key);
-	}
+	    abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..
 
-	function clearAll$1() {
-	  each$3(function (key, _) {
-	    delete globalStorage[key];
-	  });
-	}
+	    tiles.forEach(function (tile) {
+	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
 
-	// versions 6 and 7, where no localStorage, sessionStorage, etc
-	// is available.
+	      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 Global$3 = util.Global;
-	var oldIEUserDataStorage = {
-	  name: 'oldIE-userDataStorage',
-	  write: write$2,
-	  read: read$2,
-	  each: each$4,
-	  remove: remove$4,
-	  clearAll: clearAll$2
-	};
-	var storageName = 'storejs';
-	var doc = Global$3.document;
+	      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;
 
-	var _withStorageEl = _makeIEStorageElFunction();
+	        if (!data || !data.features || !data.features.length) {
+	          throw new Error('No Data');
+	        }
 
-	var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+	        data.features.forEach(function (feature) {
+	          var _feature$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)
 
-	function write$2(unfixedKey, data) {
-	  if (disable) {
-	    return;
-	  }
+	          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 fixedKey = fixKey(unfixedKey);
+	          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.
 
-	  _withStorageEl(function (storageEl) {
-	    storageEl.setAttribute(fixedKey, data);
-	    storageEl.save(storageName);
-	  });
-	}
+	          switch (whichType) {
+	            case '170':
+	              description = "This feature has a FIXME tag: ".concat(description);
+	              break;
 
-	function read$2(unfixedKey) {
-	  if (disable) {
-	    return;
-	  }
+	            case '292':
+	            case '293':
+	              description = description.replace('A turn-', 'This turn-');
+	              break;
 
-	  var fixedKey = fixKey(unfixedKey);
-	  var res = null;
+	            case '294':
+	            case '295':
+	            case '296':
+	            case '297':
+	            case '298':
+	              description = "This turn-restriction~".concat(description);
+	              break;
 
-	  _withStorageEl(function (storageEl) {
-	    res = storageEl.getAttribute(fixedKey);
-	  });
+	            case '300':
+	              description = 'This highway is missing a maxspeed tag';
+	              break;
 
-	  return res;
-	}
+	            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
 
-	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);
-	    }
-	  });
-	}
+	          var coincident = false;
 
-	function remove$4(unfixedKey) {
-	  var fixedKey = fixKey(unfixedKey);
+	          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);
 
-	  _withStorageEl(function (storageEl) {
-	    storageEl.removeAttribute(fixedKey);
-	    storageEl.save(storageName);
-	  });
-	}
+	          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;
 
-	function clearAll$2() {
-	  _withStorageEl(function (storageEl) {
-	    var attributes = storageEl.XMLDocument.documentElement.attributes;
-	    storageEl.load(storageName);
+	          _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;
 
-	    for (var i = attributes.length - 1; i >= 0; i--) {
-	      storageEl.removeAttribute(attributes[i].name);
+	    if (_cache$2.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
 	    }
 
-	    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 params = {
+	      schema: d.schema,
+	      id: d.id
+	    };
 
+	    if (d.newStatus) {
+	      params.st = d.newStatus;
+	    }
 
-	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
+	    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.
 
-	function fixKey(key) {
-	  return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
-	}
 
-	function _makeIEStorageElFunction() {
-	  if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-	    return null;
-	  }
+	    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)
 
-	  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.
+	    d3_json(url, {
+	      signal: controller.signal
+	    })["finally"](function () {
+	      delete _cache$2.inflightPost[d.id];
 
-	  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;
-	  }
+	      if (d.newStatus === 'ignore') {
+	        // ignore permanently (false positive)
+	        _this2.removeItem(d);
+	      } else if (d.newStatus === 'ignore_t') {
+	        // ignore temporarily (error fixed)
+	        _this2.removeItem(d);
 
-	  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
+	        _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
+	      } else {
+	        d = _this2.replaceItem(d.update({
+	          comment: d.newComment,
+	          newComment: undefined,
+	          newState: undefined
+	        }));
+	      }
 
-	    storageOwner.appendChild(storageEl);
-	    storageEl.addBehavior('#default#userData');
-	    storageEl.load(storageName);
-	    storeFunction.apply(this, args);
-	    storageOwner.removeChild(storageEl);
-	    return;
-	  };
-	}
+	      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
 
-	// doesn't work but cookies do. This implementation is adopted from
-	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
+	    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();
+	  }
+	};
 
-	var Global$4 = util.Global;
-	var trim$4 = util.trim;
-	var cookieStorage = {
-	  name: 'cookieStorage',
-	  read: read$3,
-	  write: write$3,
-	  each: each$5,
-	  remove: remove$5,
-	  clearAll: clearAll$3
+	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 doc$1 = Global$4.document;
+	var _impOsmData = {
+	  icons: {}
+	}; // This gets reassigned if reset
 
-	function read$3(key) {
-	  if (!key || !_has(key)) {
-	    return null;
-	  }
+	var _cache$1;
 
-	  var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-	  return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"));
+	function abortRequest$5(i) {
+	  Object.values(i).forEach(function (controller) {
+	    if (controller) {
+	      controller.abort();
+	    }
+	  });
 	}
 
-	function each$5(callback) {
-	  var cookies = doc$1.cookie.split(/; ?/g);
+	function abortUnwantedRequests$2(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	  for (var i = cookies.length - 1; i >= 0; i--) {
-	    if (!trim$4(cookies[i])) {
-	      continue;
+	    if (!wanted) {
+	      abortRequest$5(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
 	    }
-
-	    var kvp = cookies[i].split('=');
-	    var key = unescape(kvp[0]);
-	    var val = unescape(kvp[1]);
-	    callback(val, key);
-	  }
+	  });
 	}
 
-	function write$3(key, data) {
-	  if (!key) {
-	    return;
-	  }
+	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
 
-	  doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-	}
 
-	function remove$5(key) {
-	  if (!key || !_has(key)) {
-	    return;
+	function updateRtree$2(item, replace) {
+	  _cache$1.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
+
+	  if (replace) {
+	    _cache$1.rtree.insert(item);
 	  }
+	}
 
-	  doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+	function linkErrorObject(d) {
+	  return {
+	    html: "<a class=\"error_object_link\">".concat(d, "</a>")
+	  };
 	}
 
-	function clearAll$3() {
-	  each$5(function (_, key) {
-	    remove$5(key);
-	  });
+	function linkEntity(d) {
+	  return {
+	    html: "<a class=\"error_entity_link\">".concat(d, "</a>")
+	  };
 	}
 
-	function _has(key) {
-	  return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc$1.cookie);
+	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];
+	  }
 	}
 
-	var Global$5 = util.Global;
-	var sessionStorage_1 = {
-	  name: 'sessionStorage',
-	  read: read$4,
-	  write: write$4,
-	  each: each$6,
-	  remove: remove$6,
-	  clearAll: clearAll$4
-	};
+	function relativeBearing(p1, p2) {
+	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-	function sessionStorage() {
-	  return Global$5.sessionStorage;
-	}
+	  if (angle < 0) {
+	    angle += 2 * Math.PI;
+	  } // Return degrees
 
-	function read$4(key) {
-	  return sessionStorage().getItem(key);
-	}
 
-	function write$4(key, data) {
-	  return sessionStorage().setItem(key, data);
-	}
+	  return angle * 180 / Math.PI;
+	} // Assuming range [0,360)
 
-	function each$6(fn) {
-	  for (var i = sessionStorage().length - 1; i >= 0; i--) {
-	    var key = sessionStorage().key(i);
-	    fn(read$4(key), key);
-	  }
-	}
 
-	function remove$6(key) {
-	  return sessionStorage().removeItem(key);
-	}
+	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
+
 
-	function clearAll$4() {
-	  return sessionStorage().clear();
-	}
+	function preventCoincident$1(loc, bumpUp) {
+	  var coincident = false;
 
-	// 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 memoryStorage_1 = {
-	  name: 'memoryStorage',
-	  read: read$5,
-	  write: write$5,
-	  each: each$7,
-	  remove: remove$7,
-	  clearAll: clearAll$5
-	};
-	var memoryStorage = {};
+	  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 read$5(key) {
-	  return memoryStorage[key];
+	  return loc;
 	}
 
-	function write$5(key, data) {
-	  memoryStorage[key] = data;
-	}
+	var serviceImproveOSM = {
+	  title: 'improveOSM',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      return _impOsmData = d.improveOSM;
+	    });
 
-	function each$7(callback) {
-	  for (var key in memoryStorage) {
-	    if (memoryStorage.hasOwnProperty(key)) {
-	      callback(memoryStorage[key], key);
+	    if (!_cache$1) {
+	      this.reset();
 	    }
-	  }
-	}
-
-	function remove$7(key) {
-	  delete memoryStorage[key];
-	}
-
-	function clearAll$5(key) {
-	  memoryStorage = {};
-	}
-
-	var all = [// Listed in order of usage preference
-	localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-	/* 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.
+	    this.event = utilRebind(this, dispatch$6, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$1) {
+	      Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
+	    }
 
-	/*jslint
-	    eval, for, this
-	*/
+	    _cache$1 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	/*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 options = {
+	      client: 'iD',
+	      status: 'OPEN',
+	      zoom: '19' // Use a high zoom so that clusters aren't returned
 
-	(function () {
+	    }; // determine the needed tiles to cover the view
 
-	  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 tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	  function f(n) {
-	    // Format integers to have at least two digits.
-	    return n < 10 ? "0" + n : n;
-	  }
+	    abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..
 
-	  function this_value() {
-	    return this.valueOf();
-	  }
+	    tiles.forEach(function (tile) {
+	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
 
-	  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 _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];
 
-	    Boolean.prototype.toJSON = this_value;
-	    Number.prototype.toJSON = this_value;
-	    String.prototype.toJSON = this_value;
-	  }
+	      var params = Object.assign({}, options, {
+	        east: east,
+	        south: south,
+	        west: west,
+	        north: north
+	      }); // 3 separate requests to store for each tile
 
-	  var gap;
-	  var indent;
-	  var meta;
-	  var rep;
+	      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];
 
-	  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 + "\"";
-	  }
+	          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
 
-	  function str(key, holder) {
-	    // Produce a string from holder[key].
-	    var i; // The loop counter.
 
-	    var k; // The member key.
+	          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
 
-	    var v; // The member value.
+	              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
 
-	    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.
 
-	    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.
+	              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;
 
-	    if (typeof rep === "function") {
-	      value = rep.call(holder, key, value);
-	    } // What happens next depends on the value's type.
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Tiles at high zoom == missing roads
 
 
-	    switch (_typeof(value)) {
-	      case "string":
-	        return quote(value);
+	          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
 
-	      case "number":
-	        // JSON numbers must be finite. Encode non-finite numbers as null.
-	        return isFinite(value) ? String(value) : "null";
+	              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
 
-	      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.
+	              if (numberOfTrips === -1) {
+	                d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+	              }
 
-	      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.
+	              _cache$1.data[d.id] = d;
 
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Entities at high zoom == turn restrictions
 
-	        gap += indent;
-	        partial = []; // Is the value an array?
 
-	        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;
+	          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
 
-	          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.
+	              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
 
-	          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 _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
 
-	        if (rep && _typeof(rep) === "object") {
-	          length = rep.length;
+	              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;
 
-	          for (i = 0; i < length; i += 1) {
-	            if (typeof rep[i] === "string") {
-	              k = rep[i];
-	              v = str(k, value);
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
 
-	              if (v) {
-	                partial.push(quote(k) + (gap ? ": " : ":") + v);
-	              }
-	            }
+	              dispatch$6.call('loaded');
+	            });
 	          }
-	        } 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);
+	        })["catch"](function () {
+	          delete _cache$1.inflightTile[tile.id][k];
 
-	              if (v) {
-	                partial.push(quote(k) + (gap ? ": " : ":") + v);
-	              }
-	            }
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
 	          }
-	        } // Join all of the member texts together, separated with commas,
-	        // and wrap them in braces.
+	        });
+	      });
+	      _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);
+	    }
 
+	    var key = item.issueKey;
+	    var qParams = {};
 
-	        v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
-	        gap = mind;
-	        return v;
+	    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 the JSON object does not yet have a stringify method, give it one.
 
+	    var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-	  if (typeof JSON.stringify !== "function") {
-	    meta = {
-	      // table of character substitutions
-	      "\b": "\\b",
-	      "\t": "\\t",
-	      "\n": "\\n",
-	      "\f": "\\f",
-	      "\r": "\\r",
-	      "\"": "\\\"",
-	      "\\": "\\\\"
+	    var cacheComments = function cacheComments(data) {
+	      // Assign directly for immediate use afterwards
+	      // comments are served newest to oldest
+	      item.comments = data.comments ? data.comments.reverse() : [];
+
+	      _this2.replaceItem(item);
 	    };
 
-	    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.
+	    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);
+	    }
 
-	      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.
+	    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
 
-	      } else if (typeof space === "string") {
-	        indent = space;
-	      } // If there is a replacer, it must be a function or an array.
-	      // Otherwise, throw an error.
 
+	    serviceOsm.userDetails(sendPayload.bind(this));
 
-	      rep = replacer;
+	    function sendPayload(err, user) {
+	      var _this3 = this;
 
-	      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.
+	      if (err) {
+	        return callback(err, d);
+	      }
 
+	      var key = d.issueKey;
+	      var url = "".concat(_impOsmUrls[key], "/comment");
+	      var payload = {
+	        username: user.display_name,
+	        targetIds: [d.identifier]
+	      };
 
-	      return str("", {
-	        "": value
-	      });
-	    };
-	  } // If the JSON object does not yet have a parse method, give it one.
+	      if (d.newStatus) {
+	        payload.status = d.newStatus;
+	        payload.text = 'status changed';
+	      } // Comment take place of default text
 
 
-	  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;
+	      if (d.newComment) {
+	        payload.text = d.newComment;
+	      }
 
-	      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];
+	      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 (value && _typeof(value) === "object") {
-	          for (k in value) {
-	            if (Object.prototype.hasOwnProperty.call(value, k)) {
-	              v = walk(value, k);
+	        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
+	          });
 
-	              if (v !== undefined) {
-	                value[k] = v;
-	              } else {
-	                delete value[k];
-	              }
+	          _this3.replaceItem(d.update({
+	            comments: comments,
+	            newComment: undefined
+	          }));
+	        } else {
+	          _this3.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;
 	          }
 	        }
 
-	        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.
-
-
-	      text = String(text);
-	      rx_dangerous.lastIndex = 0;
+	        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
+	  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
 
-	      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.
+	    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: {}};
 
-	      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.
+	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
+	  };
+	}
+
+	function changeDefaults$1(newDefaults) {
+	  defaults$5.exports.defaults = newDefaults;
+	}
+
+	defaults$5.exports = {
+	  defaults: getDefaults$1(),
+	  getDefaults: getDefaults$1,
+	  changeDefaults: changeDefaults$1
+	};
 
-	        return typeof reviver === "function" ? walk({
-	          "": j
-	        }, "") : j;
-	      } // If the text is not JSON parseable, then a SyntaxError is thrown.
+	var escapeTest = /[&<>"']/;
+	var escapeReplace = /[&<>"']/g;
+	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+	var escapeReplacements = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
 
+	var getEscapeReplacement = function getEscapeReplacement(ch) {
+	  return escapeReplacements[ch];
+	};
 
-	      throw new SyntaxError("JSON.parse");
-	    };
+	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);
+	    }
 	  }
-	})();
-
-	var json2 = json2Plugin;
 
-	function json2Plugin() {
-	  return {};
+	  return html;
 	}
 
-	var plugins = [json2];
-	var store_legacy = storeEngine.createStore(all, plugins);
+	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-	//
-	// 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.
+	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 ':';
 
+	    if (n.charAt(0) === '#') {
+	      return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
+	    }
 
-	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
+	    return '';
+	  });
+	}
 
-	  oauth.authenticated = function () {
-	    return !!(token('oauth_token') && token('oauth_token_secret'));
-	  };
+	var caret = /(^|[^\[])\^/g;
 
-	  oauth.logout = function () {
-	    token('oauth_token', '');
-	    token('oauth_token_secret', '');
-	    token('oauth_request_token_secret', '');
-	    return oauth;
-	  }; // TODO: detect lack of click event
+	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;
+	}
 
+	var nonWordAndColonTest = /[^\w:]/g;
+	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-	  oauth.authenticate = function (callback) {
-	    if (oauth.authenticated()) return callback();
-	    oauth.logout(); // ## Getting a request token
+	function cleanUrl$1(sanitize, base, href) {
+	  if (sanitize) {
+	    var prot;
 
-	    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));
+	    try {
+	      prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+	    } catch (e) {
+	      return null;
+	    }
 
-	    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 (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+	      return null;
+	    }
+	  }
 
-	      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.
+	  if (base && !originIndependentUrl.test(href)) {
+	    href = resolveUrl$2(base, href);
+	  }
 
+	  try {
+	    href = encodeURI(href).replace(/%25/g, '%');
+	  } catch (e) {
+	    return null;
+	  }
 
-	    ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-	    o.loading();
+	  return href;
+	}
 
-	    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$1(o.landing)
-	      });
+	var baseUrls = {};
+	var justDomain = /^[^:]+:\/*[^/]*$/;
+	var protocol = /^([^:]+:)[\s\S]*$/;
+	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-	      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.
+	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);
+	    }
+	  }
 
+	  base = baseUrls[' ' + base];
+	  var relativeBase = base.indexOf(':') === -1;
 
-	    window.authComplete = function (token) {
-	      var oauth_token = ohauth_1.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.
+	  if (href.substring(0, 2) === '//') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
+	    return base.replace(protocol, '$1') + href;
+	  } else if (href.charAt(0) === '/') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	    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`
+	    return base.replace(domain, '$1') + href;
+	  } else {
+	    return base + href;
+	  }
+	}
 
-	      ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	      o.loading();
-	    }
+	var noopTest$1 = {
+	  exec: function noopTest() {}
+	};
 
-	    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);
-	    }
-	  };
+	function merge$2(obj) {
+	  var i = 1,
+	      target,
+	      key;
 
-	  oauth.bringPopupWindowToFront = function () {
-	    var brougtPopupToFront = false;
+	  for (; i < arguments.length; i++) {
+	    target = arguments[i];
 
-	    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;
+	    for (key in target) {
+	      if (Object.prototype.hasOwnProperty.call(target, key)) {
+	        obj[key] = target[key];
 	      }
-	    } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
 	    }
+	  }
 
-	    return brougtPopupToFront;
-	  };
+	  return obj;
+	}
 
-	  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`
+	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;
 
-	      ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	      o.loading();
+	    while (--curr >= 0 && str[curr] === '\\') {
+	      escaped = !escaped;
 	    }
 
-	    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);
+	    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;
 
-	    get_access_token(oauth_token);
-	  }; // # xhr
-	  //
-	  // A single XMLHttpRequest wrapper that does authenticated calls if the
-	  // user has logged in.
+	  if (cells.length > count) {
+	    cells.splice(count);
+	  } else {
+	    while (cells.length < count) {
+	      cells.push('');
+	    }
+	  }
 
+	  for (; i < cells.length; i++) {
+	    // leading or trailing whitespace is ignored per the gfm spec
+	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	  }
 
-	  oauth.xhr = function (options, callback) {
-	    if (!oauth.authenticated()) {
-	      if (o.auto) {
-	        return oauth.authenticate(run);
-	      } else {
-	        callback('not authenticated', null);
-	        return;
-	      }
+	  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.
+
+
+	function rtrim$1(str, c, invert) {
+	  var l = str.length;
+
+	  if (l === 0) {
+	    return '';
+	  } // Length of suffix matching the invert condition.
+
+
+	  var suffLen = 0; // 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++;
 	    } else {
-	      return run();
+	      break;
 	    }
+	  }
 
-	    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
+	  return str.substr(0, l - suffLen);
+	}
 
-	      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));
-	      }
+	function findClosingBracket$1(str, b) {
+	  if (str.indexOf(b[1]) === -1) {
+	    return -1;
+	  }
 
-	      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))));
-	      return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
-	    }
+	  var l = str.length;
+	  var level = 0,
+	      i = 0;
 
-	    function done(err, xhr) {
-	      if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
+	  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;
+	      }
 	    }
-	  }; // pre-authorize this object, if we can just get a token and token_secret
-	  // from the start
+	  }
+
+	  return -1;
+	}
 
+	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
 
-	  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;
-	  };
 
-	  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
+	function repeatString$1(pattern, count) {
+	  if (count < 1) {
+	    return '';
+	  }
 
-	    o.loading = o.loading || function () {};
+	  var result = '';
 
-	    o.done = o.done || function () {};
+	  while (count > 1) {
+	    if (count & 1) {
+	      result += pattern;
+	    }
 
-	    return oauth.preauth(o);
-	  }; // 'stamp' an authentication object from `getAuth()`
-	  // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-	  // and timestamp
+	    count >>= 1;
+	    pattern += pattern;
+	  }
 
+	  return result + pattern;
+	}
 
-	  function timenonce(o) {
-	    o.oauth_timestamp = ohauth_1.timestamp();
-	    o.oauth_nonce = ohauth_1.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 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;
 
-	  var token;
+	function outputLink(cap, link, raw) {
+	  var href = link.href;
+	  var title = link.title ? _escape(link.title) : null;
+	  var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-	  if (store_legacy.enabled) {
-	    token = function token(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 (cap[0].charAt(0) !== '!') {
+	    return {
+	      type: 'link',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: text
 	    };
 	  } else {
-	    var storage = {};
-
-	    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
-
-
-	  function getAuth(o) {
 	    return {
-	      oauth_consumer_key: o.oauth_consumer_key,
-	      oauth_signature_method: 'HMAC-SHA1'
+	      type: 'image',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: _escape(text)
 	    };
-	  } // potentially pre-authorize
-
-
-	  oauth.options(o);
-	  return oauth;
-	};
+	  }
+	}
 
-	var JXON = new function () {
-	  var sValueProp = 'keyValue',
-	      sAttributesProp = 'keyAttributes',
-	      sAttrPref = '@',
+	function indentCodeCompensation(raw, text) {
+	  var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-	  /* you can customize these values */
-	  aCache = [],
-	      rIsNull = /^\s*$/,
-	      rIsBool = /^(?:true|false)$/i;
+	  if (matchIndentToCode === null) {
+	    return text;
+	  }
 
-	  function parseText(sValue) {
-	    if (rIsNull.test(sValue)) {
-	      return null;
-	    }
+	  var indentToCode = matchIndentToCode[1];
+	  return text.split('\n').map(function (node) {
+	    var matchIndentInNode = node.match(/^\s+/);
 
-	    if (rIsBool.test(sValue)) {
-	      return sValue.toLowerCase() === 'true';
+	    if (matchIndentInNode === null) {
+	      return node;
 	    }
 
-	    if (isFinite(sValue)) {
-	      return parseFloat(sValue);
-	    }
+	    var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+	        indentInNode = _matchIndentInNode[0];
 
-	    if (isFinite(Date.parse(sValue))) {
-	      return new Date(sValue);
+	    if (indentInNode.length >= indentToCode.length) {
+	      return node.slice(indentToCode.length);
 	    }
 
-	    return sValue;
-	  }
-
-	  function EmptyTree() {}
+	    return node;
+	  }).join('\n');
+	}
+	/**
+	 * Tokenizer
+	 */
 
-	  EmptyTree.prototype.toString = function () {
-	    return 'null';
-	  };
 
-	  EmptyTree.prototype.valueOf = function () {
-	    return null;
-	  };
+	var Tokenizer_1 = /*#__PURE__*/function () {
+	  function Tokenizer(options) {
+	    _classCallCheck$1(this, Tokenizer);
 
-	  function objectify(vValue) {
-	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+	    this.options = options || defaults$4;
 	  }
 
-	  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;
-
-	    if (bChildren) {
-	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-	        oNode = oParentNode.childNodes.item(nItem);
+	  _createClass$1(Tokenizer, [{
+	    key: "space",
+	    value: function space(src) {
+	      var cap = this.rules.block.newline.exec(src);
 
-	        if (oNode.nodeType === 4) {
-	          sCollectedTxt += oNode.nodeValue;
+	      if (cap) {
+	        if (cap[0].length > 1) {
+	          return {
+	            type: 'space',
+	            raw: cap[0]
+	          };
 	        }
-	        /* 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) */
 
+	        return {
+	          raw: '\n'
+	        };
 	      }
 	    }
+	  }, {
+	    key: "code",
+	    value: function code(src) {
+	      var cap = this.rules.block.code.exec(src);
 
-	    var nLevelEnd = aCache.length,
-	        vBuiltVal = parseText(sCollectedTxt);
+	      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);
 
-	    if (!bHighVerb && (bChildren || bAttributes)) {
-	      vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+	      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);
 
-	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-	      sProp = aCache[nElId].nodeName.toLowerCase();
-	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
+	      if (cap) {
+	        var text = cap[2].trim(); // remove trailing #s
 
-	      if (vResult.hasOwnProperty(sProp)) {
-	        if (vResult[sProp].constructor !== Array) {
-	          vResult[sProp] = [vResult[sProp]];
+	        if (/#$/.test(text)) {
+	          var trimmed = rtrim(text, '#');
+
+	          if (this.options.pedantic) {
+	            text = trimmed.trim();
+	          } else if (!trimmed || / $/.test(trimmed)) {
+	            // CommonMark requires space before trailing #s
+	            text = trimmed.trim();
+	          }
 	        }
 
-	        vResult[sProp].push(vContent);
-	      } else {
-	        vResult[sProp] = vContent;
-	        nLength++;
+	        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 (bAttributes) {
-	      var nAttrLen = oParentNode.attributes.length,
-	          sAPrefix = bNesteAttr ? '' : sAttrPref,
-	          oAttrParent = bNesteAttr ? {} : vResult;
+	      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]
+	        };
 
-	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-	        oAttrib = oParentNode.attributes.item(nAttrib);
-	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-	      }
+	        if (item.header.length === item.align.length) {
+	          var l = item.align.length;
+	          var i;
 
-	      if (bNesteAttr) {
-	        if (bFreeze) {
-	          Object.freeze(oAttrParent);
-	        }
+	          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;
+	            }
+	          }
 
-	        vResult[sAttributesProp] = oAttrParent;
-	        nLength -= nAttrLen - 1;
+	          l = item.cells.length;
+
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells(item.cells[i], item.header.length);
+	          }
+
+	          return item;
+	        }
 	      }
 	    }
+	  }, {
+	    key: "hr",
+	    value: function hr(src) {
+	      var cap = this.rules.block.hr.exec(src);
 
-	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-	      vResult[sValueProp] = vBuiltVal;
-	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-	      vResult = vBuiltVal;
+	      if (cap) {
+	        return {
+	          type: 'hr',
+	          raw: cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(src) {
+	      var cap = this.rules.block.blockquote.exec(src);
 
-	    if (bFreeze && (bHighVerb || nLength > 0)) {
-	      Object.freeze(vResult);
+	      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);
 
-	    aCache.length = nLevelStart;
-	    return vResult;
-	  }
+	      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.
 
-	  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
-	    var vValue, oChild;
+	        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]);
 
-	    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 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.
 
-	    for (var sName in oParentObj) {
-	      vValue = oParentObj[sName];
 
-	      if (isFinite(sName) || vValue instanceof Function) {
-	        continue;
-	      }
-	      /* verbosity level is 0 */
+	          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;
+	            }
 
-	      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);
+	            bcurr = bnext;
+	          } // Remove the list item's bullet
+	          // so it is seen as the next token.
 
-	        if (vValue instanceof Object) {
-	          loadObjTree(oXMLDoc, oChild, vValue);
-	        } else if (vValue !== null && vValue !== true) {
-	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+
+	          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;
+	          }
+
+	          if (loose) {
+	            list.loose = true;
+	          } // Check for task list items
+
+
+	          if (this.options.gfm) {
+	            istask = /^\[[ xX]\] /.test(item);
+	            ischecked = undefined;
+
+	            if (istask) {
+	              ischecked = item[1] !== ' ';
+	              item = item.replace(/^\[[ xX]\] +/, '');
+	            }
+	          }
+
+	          list.items.push({
+	            type: 'list_item',
+	            raw: raw,
+	            task: istask,
+	            checked: ischecked,
+	            loose: loose,
+	            text: item
+	          });
 	        }
 
-	        oParentEl.appendChild(oChild);
+	        return list;
 	      }
 	    }
-	  }
-
-	  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);
-	  };
+	  }, {
+	    key: "html",
+	    value: function html(src) {
+	      var cap = this.rules.block.html.exec(src);
 
-	  this.unbuild = function (oObjTree) {
-	    var oNewDoc = document.implementation.createDocument('', '', null);
-	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
-	    return oNewDoc;
-	  };
+	      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);
 
-	  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));
+	      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);
 
-	var tiler$5 = utilTiler();
-	var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
-	var urlroot = 'https://www.openstreetmap.org';
-	var oauth = osmAuth({
-	  url: urlroot,
-	  oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
-	  oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
-	  loading: authLoading,
-	  done: authDone
-	}); // hardcode default block of Google Maps
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+	        };
 
-	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: {}
-	};
+	        if (item.header.length === item.align.length) {
+	          item.raw = cap[0];
+	          var l = item.align.length;
+	          var i;
 
-	var _cachedApiStatus;
+	          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;
+	            }
+	          }
 
-	var _changeset = {};
+	          l = item.cells.length;
 
-	var _deferred = new Set();
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+	          }
 
-	var _connectionID = 1;
-	var _tileZoom$3 = 16;
-	var _noteZoom = 12;
+	          return item;
+	        }
+	      }
+	    }
+	  }, {
+	    key: "lheading",
+	    value: function lheading(src) {
+	      var cap = this.rules.block.lheading.exec(src);
 
-	var _rateLimitError;
+	      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);
 
-	var _userChangesets;
+	      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);
 
-	var _userDetails;
+	      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);
 
-	var _off; // set a default but also load this from the API status
+	      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 (cap) {
+	        if (!inLink && /^<a /i.test(cap[0])) {
+	          inLink = true;
+	        } else if (inLink && /^<\/a>/i.test(cap[0])) {
+	          inLink = false;
+	        }
 
-	var _maxWayNodes = 2000;
+	        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;
+	        }
 
-	function authLoading() {
-	  dispatch$6.call('authLoading');
-	}
+	        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);
 
-	function authDone() {
-	  dispatch$6.call('authDone');
-	}
+	      if (cap) {
+	        var trimmedUrl = cap[2].trim();
 
-	function abortRequest$5(controllerOrXHR) {
-	  if (controllerOrXHR) {
-	    controllerOrXHR.abort();
-	  }
-	}
+	        if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+	          // commonmark requires matching angle brackets
+	          if (!/>$/.test(trimmedUrl)) {
+	            return;
+	          } // ending angle bracket cannot be escaped
 
-	function hasInflightRequests(cache) {
-	  return Object.keys(cache.inflight).length;
-	}
 
-	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;
-	    abortRequest$5(cache.inflight[k]);
-	    delete cache.inflight[k];
-	  });
-	}
+	          var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
 
-	function getLoc(attrs) {
-	  var lon = attrs.lon && attrs.lon.value;
-	  var lat = attrs.lat && attrs.lat.value;
-	  return [parseFloat(lon), parseFloat(lat)];
-	}
+	          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] = '';
+	          }
+	        }
 
-	function getNodes(obj) {
-	  var elems = obj.getElementsByTagName('nd');
-	  var nodes = new Array(elems.length);
+	        var href = cap[2];
+	        var title = '';
 
-	  for (var i = 0, l = elems.length; i < l; i++) {
-	    nodes[i] = 'n' + elems[i].attributes.ref.value;
-	  }
+	        if (this.options.pedantic) {
+	          // split pedantic href and title
+	          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-	  return nodes;
-	}
+	          if (link) {
+	            href = link[1];
+	            title = link[3];
+	          }
+	        } else {
+	          title = cap[3] ? cap[3].slice(1, -1) : '';
+	        }
 
-	function getNodesJSON(obj) {
-	  var elems = obj.nodes;
-	  var nodes = new Array(elems.length);
+	        href = href.trim();
 
-	  for (var i = 0, l = elems.length; i < l; i++) {
-	    nodes[i] = 'n' + elems[i];
-	  }
+	        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);
+	          }
+	        }
 
-	  return nodes;
-	}
+	        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;
 
-	function getTags(obj) {
-	  var elems = obj.getElementsByTagName('tag');
-	  var tags = {};
+	      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()];
 
-	  for (var i = 0, l = elems.length; i < l; i++) {
-	    var attrs = elems[i].attributes;
-	    tags[attrs.k.value] = attrs.v.value;
-	  }
+	        if (!link || !link.href) {
+	          var text = cap[0].charAt(0);
+	          return {
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          };
+	        }
 
-	  return tags;
-	}
+	        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
 
-	function getMembers(obj) {
-	  var elems = obj.getElementsByTagName('member');
-	  var members = new Array(elems.length);
+	      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\u0870-\u0887\u0889-\u088E\u08A0-\u08C9\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\u0C5D\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDD\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-\u1711\u171F-\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-\u1B4C\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-\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-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7CA\uA7D0\uA7D1\uA7D3\uA7D5-\uA7D9\uA7F2-\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\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return;
+	      var nextChar = match[1] || match[2] || '';
 
-	  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
-	    };
-	  }
+	      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?)
 
-	  return members;
-	}
+	        maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
 
-	function getMembersJSON(obj) {
-	  var elems = obj.members;
-	  var members = new Array(elems.length);
+	        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__
 
-	  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
-	    };
-	  }
+	          rLength = rDelim.length;
 
-	  return members;
-	}
+	          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 getVisible(attrs) {
-	  return !attrs.visible || attrs.visible.value !== 'false';
-	}
+	          delimTotal -= rLength;
+	          if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+	          // Remove extra characters. *a*** -> *a*
 
-	function parseComments(comments) {
-	  var parsedComments = []; // for each comment
+	          rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***
 
-	  for (var i = 0; i < comments.length; i++) {
-	    var comment = comments[i];
+	          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 (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;
+	          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 (nodeName === 'uid') {
-	          var uid = node.textContent;
+	      if (cap) {
+	        var text = cap[2].replace(/\n/g, ' ');
+	        var hasNonSpaceChars = /[^ ]/.test(text);
+	        var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
 
-	          if (uid && !_userCache.user[uid]) {
-	            _userCache.toLoad[uid] = true;
-	          }
+	        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+	          text = text.substring(1, text.length - 1);
 	        }
-	      }
 
-	      if (parsedComment) {
-	        parsedComments.push(parsedComment);
+	        text = _escape(text, true);
+	        return {
+	          type: 'codespan',
+	          raw: cap[0],
+	          text: text
+	        };
 	      }
 	    }
-	  }
-
-	  return parsedComments;
-	}
-
-	function encodeNoteRtree(note) {
-	  return {
-	    minX: note.loc[0],
-	    minY: note.loc[1],
-	    maxX: note.loc[0],
-	    maxY: note.loc[1],
-	    data: note
-	  };
-	}
+	  }, {
+	    key: "br",
+	    value: function br(src) {
+	      var cap = this.rules.inline.br.exec(src);
 
-	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)
-	    });
-	  }
-	};
+	      if (cap) {
+	        return {
+	          type: 'br',
+	          raw: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(src) {
+	      var cap = this.rules.inline.del.exec(src);
 
-	function parseJSON(payload, callback, options) {
-	  options = Object.assign({
-	    skipSeen: true
-	  }, options);
+	      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);
 
-	  if (!payload) {
-	    return callback({
-	      message: 'No JSON',
-	      status: -1
-	    });
-	  }
+	      if (cap) {
+	        var text, href;
 
-	  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 () {
-	    var results = [];
-	    var result;
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+	          href = 'mailto:' + text;
+	        } else {
+	          text = _escape(cap[1]);
+	          href = text;
+	        }
 
-	    for (var i = 0; i < children.length; i++) {
-	      result = parseChild(children[i]);
-	      if (result) results.push(result);
+	        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;
 
-	    callback(null, results);
-	  });
+	      if (cap = this.rules.inline.url.exec(src)) {
+	        var text, href;
 
-	  _deferred.add(handle);
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+	          href = 'mailto:' + text;
+	        } else {
+	          // do extended autolink path validation
+	          var prevCapZero;
 
-	  function parseChild(child) {
-	    var parser = jsonparsers[child.type];
-	    if (!parser) return null;
-	    var uid;
-	    uid = osmEntity.id.fromOSM(child.type, child.id);
+	          do {
+	            prevCapZero = cap[0];
+	            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+	          } while (prevCapZero !== cap[0]);
 
-	    if (options.skipSeen) {
-	      if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+	          text = _escape(cap[0]);
 
-	      _tileCache.seen[uid] = true;
+	          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
+	          }]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "inlineText",
+	    value: function inlineText(src, inRawBlock, smartypants) {
+	      var cap = this.rules.inline.text.exec(src);
 
-	    return parser(child, uid);
-	  }
-	}
+	      if (cap) {
+	        var text;
 
-	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
+	        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]);
+	        }
+
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }]);
 
-	    var coincident = false;
-	    var epsilon = 0.00001;
+	  return Tokenizer;
+	}();
 
-	    do {
-	      if (coincident) {
-	        props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
-	      }
+	var noopTest = helpers.noopTest,
+	    edit = helpers.edit,
+	    merge$1 = helpers.merge;
+	/**
+	 * Block-Level Grammar
+	 */
 
-	      var bbox = geoExtent(props.loc).bbox();
-	      coincident = _noteCache.rtree.search(bbox).length;
-	    } while (coincident); // parse note contents
+	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
+	 */
 
+	block$1.normal = merge$1({}, block$1);
+	/**
+	 * GFM Block Grammar
+	 */
 
-	    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
+	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
 
-	      if (nodeName === 'comments') {
-	        props[nodeName] = parseComments(node.childNodes);
-	      } else {
-	        props[nodeName] = node.textContent;
-	      }
-	    }
+	});
+	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)
+	 */
 
-	    var note = new osmNote(props);
-	    var item = encodeNoteRtree(note);
-	    _noteCache.note[note.id] = note;
+	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
+	 */
 
-	    _noteCache.rtree.insert(item);
+	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 _
 
-	    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');
-
-	    if (img && img[0] && img[0].getAttribute('href')) {
-	      user.image_url = img[0].getAttribute('href');
-	    }
+	  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 changesets = obj.getElementsByTagName('changesets');
+	inline$1.normal = merge$1({}, inline$1);
+	/**
+	 * Pedantic Inline Grammar
+	 */
 
-	    if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-	      user.changesets_count = changesets[0].getAttribute('count');
-	    }
+	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
+	 */
 
-	    var blocks = obj.getElementsByTagName('blocks');
+	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
+	 */
 
-	    if (blocks && blocks[0]) {
-	      var received = blocks[0].getElementsByTagName('received');
+	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
+	};
 
-	      if (received && received[0] && received[0].getAttribute('active')) {
-	        user.active_blocks = received[0].getAttribute('active');
-	      }
-	    }
+	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
+	 */
 
-	    _userCache.user[uid] = user;
-	    delete _userCache.toLoad[uid];
-	    return user;
-	  }
-	};
+	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
+	 */
 
-	function parseXML(xml, callback, options) {
-	  options = Object.assign({
-	    skipSeen: true
-	  }, options);
 
-	  if (!xml || !xml.childNodes) {
-	    return callback({
-	      message: 'No XML',
-	      status: -1
-	    });
-	  }
+	function mangle(text) {
+	  var out = '',
+	      i,
+	      ch;
+	  var l = text.length;
 
-	  var root = xml.childNodes[0];
-	  var children = root.childNodes;
-	  var handle = window.requestIdleCallback(function () {
-	    var results = [];
-	    var result;
+	  for (i = 0; i < l; i++) {
+	    ch = text.charCodeAt(i);
 
-	    for (var i = 0; i < children.length; i++) {
-	      result = parseChild(children[i]);
-	      if (result) results.push(result);
+	    if (Math.random() > 0.5) {
+	      ch = 'x' + ch.toString(16);
 	    }
 
-	    callback(null, results);
-	  });
+	    out += '&#' + ch + ';';
+	  }
 
-	  _deferred.add(handle);
+	  return out;
+	}
+	/**
+	 * Block Lexer
+	 */
 
-	  function parseChild(child) {
-	    var parser = parsers[child.nodeName];
-	    if (!parser) return null;
-	    var uid;
 
-	    if (child.nodeName === 'user') {
-	      uid = child.attributes.id.value;
+	var Lexer_1 = /*#__PURE__*/function () {
+	  function Lexer(options) {
+	    _classCallCheck$1(this, Lexer);
 
-	      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);
+	    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 (options.skipSeen) {
-	        if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+	    if (this.options.pedantic) {
+	      rules.block = block.pedantic;
+	      rules.inline = inline.pedantic;
+	    } else if (this.options.gfm) {
+	      rules.block = block.gfm;
 
-	        _tileCache.seen[uid] = true;
+	      if (this.options.breaks) {
+	        rules.inline = inline.breaks;
+	      } else {
+	        rules.inline = inline.gfm;
 	      }
 	    }
 
-	    return parser(child, uid);
+	    this.tokenizer.rules = rules;
 	  }
-	} // replace or remove note from rtree
+	  /**
+	   * Expose Rules
+	   */
 
 
-	function updateRtree$3(item, replace) {
-	  _noteCache.rtree.remove(item, function isEql(a, b) {
-	    return a.data.id === b.data.id;
-	  });
+	  _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
+	     */
 
-	  if (replace) {
-	    _noteCache.rtree.insert(item);
-	  }
-	}
+	  }, {
+	    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;
 
-	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();
+	      if (this.options.pedantic) {
+	        src = src.replace(/^ +$/gm, '');
 	      }
 
-	      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 token, i, l, lastToken;
 
-	var serviceOsm = {
-	  init: function init() {
-	    utilRebind(this, dispatch$6, 'on');
-	  },
-	  reset: function reset() {
-	    Array.from(_deferred).forEach(function (handle) {
-	      window.cancelIdleCallback(handle);
+	      while (src) {
+	        // newline
+	        if (token = this.tokenizer.space(src)) {
+	          src = src.substring(token.raw.length);
 
-	      _deferred["delete"](handle);
-	    });
-	    _connectionID++;
-	    _userChangesets = undefined;
-	    _userDetails = undefined;
-	    _rateLimitError = undefined;
-	    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);
-	    _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;
+	          if (token.type) {
+	            tokens.push(token);
+	          }
 
-	    function done(err, payload) {
-	      if (that.getConnectionId() !== cid) {
-	        if (callback) callback({
-	          message: 'Connection Switched',
-	          status: -1
-	        });
-	        return;
-	      }
+	          continue;
+	        } // code
 
-	      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$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();
-	        }
+	        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.
 
-	        if (callback) {
-	          if (err) {
-	            return callback(err);
+	          if (lastToken && lastToken.type === 'paragraph') {
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
 	          } else {
-	            if (path.indexOf('.json') !== -1) {
-	              return parseJSON(payload, callback, options);
-	            } else {
-	              return parseXML(payload, callback, options);
-	            }
+	            tokens.push(token);
 	          }
-	        }
-	      }
-	    }
-
-	    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;
-	    }
-	  },
-	  // 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 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 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
+	          continue;
+	        } // fences
 
-	      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));
-	    }
+	        if (token = this.tokenizer.fences(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // heading
 
-	    function createdChangeset(err, changesetID) {
-	      _changeset.inflight = null;
 
-	      if (err) {
-	        return callback(err, changeset);
-	      }
+	        if (token = this.tokenizer.heading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // table no leading pipe (gfm)
 
-	      _changeset.open = changesetID;
-	      changeset = changeset.update({
-	        id: changesetID
-	      }); // 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));
-	    }
+	        if (token = this.tokenizer.nptable(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // hr
 
-	    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 (token = this.tokenizer.hr(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // blockquote
 
-	      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);
-	      }
-	    });
 
-	    if (cached.length || !this.authenticated()) {
-	      callback(undefined, cached);
-	      if (!this.authenticated()) return; // require auth
-	    }
+	        if (token = this.tokenizer.blockquote(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.blockTokens(token.text, [], top);
+	          tokens.push(token);
+	          continue;
+	        } // list
 
-	    utilArrayChunk(toLoad, 150).forEach(function (arr) {
-	      oauth.xhr({
-	        method: 'GET',
-	        path: '/api/0.6/users?users=' + arr.join()
-	      }, wrapcb(this, done, _connectionID));
-	    }.bind(this));
 
-	    function done(err, xml) {
-	      if (err) {
-	        return callback(err);
-	      }
+	        if (token = this.tokenizer.list(src)) {
+	          src = src.substring(token.raw.length);
+	          l = token.items.length;
 
-	      var options = {
-	        skipSeen: true
-	      };
-	      return parseXML(xml, function (err, results) {
-	        if (err) {
-	          return callback(err);
-	        } else {
-	          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]);
-	    }
+	          for (i = 0; i < l; i++) {
+	            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+	          }
 
-	    oauth.xhr({
-	      method: 'GET',
-	      path: '/api/0.6/user/' + uid
-	    }, wrapcb(this, done, _connectionID));
+	          tokens.push(token);
+	          continue;
+	        } // html
 
-	    function done(err, xml) {
-	      if (err) {
-	        return callback(err);
-	      }
 
-	      var options = {
-	        skipSeen: true
-	      };
-	      return parseXML(xml, function (err, results) {
-	        if (err) {
-	          return callback(err);
-	        } else {
-	          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);
-	    }
+	        if (token = this.tokenizer.html(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // def
 
-	    oauth.xhr({
-	      method: 'GET',
-	      path: '/api/0.6/user/details'
-	    }, wrapcb(this, done, _connectionID));
 
-	    function done(err, xml) {
-	      if (err) {
-	        return callback(err);
-	      }
+	        if (top && (token = this.tokenizer.def(src))) {
+	          src = src.substring(token.raw.length);
 
-	      var options = {
-	        skipSeen: false
-	      };
-	      return parseXML(xml, function (err, results) {
-	        if (err) {
-	          return callback(err);
-	        } else {
-	          _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);
-	    }
+	          if (!this.tokens.links[token.tag]) {
+	            this.tokens.links[token.tag] = {
+	              href: token.href,
+	              title: token.title
+	            };
+	          }
 
-	    this.userDetails(wrapcb(this, gotDetails, _connectionID));
+	          continue;
+	        } // table (gfm)
 
-	    function gotDetails(err, user) {
-	      if (err) {
-	        return callback(err);
-	      }
 
-	      oauth.xhr({
-	        method: 'GET',
-	        path: '/api/0.6/changesets?user=' + user.id
-	      }, wrapcb(this, done, _connectionID));
-	    }
+	        if (token = this.tokenizer.table(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // lheading
 
-	    function done(err, xml) {
-	      if (err) {
-	        return callback(err);
-	      }
 
-	      _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);
-	    });
+	        if (token = this.tokenizer.lheading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // top-level paragraph
 
-	    function done(err, xml) {
-	      if (err) {
-	        // the status is null if no response could be retrieved
-	        return callback(err, null);
-	      } // update blocklists
 
+	        if (top && (token = this.tokenizer.paragraph(src))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	      var elements = xml.getElementsByTagName('blacklist');
-	      var regexes = [];
 
-	      for (var i = 0; i < elements.length; i++) {
-	        var regexString = elements[i].getAttribute('regex'); // needs unencode?
+	        if (token = this.tokenizer.text(src)) {
+	          src = src.substring(token.raw.length);
+	          lastToken = tokens[tokens.length - 1];
 
-	        if (regexString) {
-	          try {
-	            var regex = new RegExp(regexString);
-	            regexes.push(regex);
-	          } catch (e) {
-	            /* noop */
+	          if (lastToken && lastToken.type === 'text') {
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          } else {
+	            tokens.push(token);
 	          }
+
+	          continue;
 	        }
-	      }
 
-	      if (regexes.length) {
-	        _imageryBlocklists = regexes;
-	      }
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	      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$6.call('apiStatusChange', that, err, status);
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
 	          }
-	        });
-	      }, 500);
+	        }
+	      }
+
+	      return tokens;
 	    }
+	  }, {
+	    key: "inline",
+	    value: function inline(tokens) {
+	      var i, j, k, l2, row, token;
+	      var l = tokens.length;
 
-	    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
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
 
-	    var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
+	        switch (token.type) {
+	          case 'paragraph':
+	          case 'text':
+	          case 'heading':
+	            {
+	              token.tokens = [];
+	              this.inlineTokens(token.text, token.tokens);
+	              break;
+	            }
 
-	    var hadRequests = hasInflightRequests(_tileCache);
-	    abortUnwantedRequests$3(_tileCache, tiles);
+	          case 'table':
+	            {
+	              token.tokens = {
+	                header: [],
+	                cells: []
+	              }; // header
 
-	    if (hadRequests && !hasInflightRequests(_tileCache)) {
-	      dispatch$6.call('loaded'); // stop the spinner
-	    } // issue new requests..
+	              l2 = token.header.length;
 
+	              for (j = 0; j < l2; j++) {
+	                token.tokens.header[j] = [];
+	                this.inlineTokens(token.header[j], token.tokens.header[j]);
+	              } // cells
 
-	    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;
 
-	    if (!hasInflightRequests(_tileCache)) {
-	      dispatch$6.call('loading'); // start the spinner
-	    }
+	              l2 = token.cells.length;
 
-	    var path = '/api/0.6/map.json?bbox=';
-	    var options = {
-	      skipSeen: true
-	    };
-	    _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
+	              for (j = 0; j < l2; j++) {
+	                row = token.cells[j];
+	                token.tokens.cells[j] = [];
 
-	    function tileCallback(err, parsed) {
-	      delete _tileCache.inflight[tile.id];
+	                for (k = 0; k < row.length; k++) {
+	                  token.tokens.cells[j][k] = [];
+	                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
+	                }
+	              }
 
-	      if (!err) {
-	        delete _tileCache.toLoad[tile.id];
-	        _tileCache.loaded[tile.id] = true;
-	        var bbox = tile.extent.bbox();
-	        bbox.id = tile.id;
+	              break;
+	            }
 
-	        _tileCache.rtree.insert(bbox);
-	      }
+	          case 'blockquote':
+	            {
+	              this.inline(token.tokens);
+	              break;
+	            }
 
-	      if (callback) {
-	        callback(err, Object.assign({
-	          data: parsed
-	        }, tile));
-	      }
+	          case 'list':
+	            {
+	              l2 = token.items.length;
 
-	      if (!hasInflightRequests(_tileCache)) {
-	        dispatch$6.call('loaded'); // stop the spinner
+	              for (j = 0; j < l2; j++) {
+	                this.inline(token.items[j].tokens);
+	              }
+
+	              break;
+	            }
+	        }
 	      }
+
+	      return tokens;
 	    }
-	  },
-	  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$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);
-	    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=';
+	    /**
+	     * Lexing/Compiling
+	     */
 
-	    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
+	  }, {
+	    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
+
+	      var maskedSrc = src;
+	      var match;
+	      var keepPrevChar, prevChar; // Mask out reflinks
+
+	      if (this.tokens.links) {
+	        var links = Object.keys(this.tokens.links);
+
+	        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
 
 
-	    var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
+	      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
 
-	    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];
+	      while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+	        maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
+	      }
 
-	        if (!err) {
-	          _noteCache.loaded[tile.id] = true;
+	      while (src) {
+	        if (!keepPrevChar) {
+	          prevChar = '';
 	        }
 
-	        throttleLoadUsers();
-	        dispatch$6.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);
-	    }
+	        keepPrevChar = false; // 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;
+	          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);
+	          }
+
+	          continue;
+	        } // link
+
 
-	    if (_noteCache.inflightPost[note.id]) {
-	      return callback({
-	        message: 'Note update already inflight',
-	        status: -2
-	      }, note);
-	    }
+	        if (token = this.tokenizer.link(src)) {
+	          src = src.substring(token.raw.length);
 
-	    if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          }
 
-	    var comment = note.newComment;
+	          tokens.push(token);
+	          continue;
+	        } // reflink, nolink
 
-	    if (note.newCategory && note.newCategory !== 'None') {
-	      comment += ' #' + note.newCategory;
-	    }
 
-	    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));
+	        if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+	          src = src.substring(token.raw.length);
+	          var _lastToken2 = tokens[tokens.length - 1];
 
-	    function done(err, xml) {
-	      delete _noteCache.inflightPost[note.id];
+	          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);
+	          }
 
-	      if (err) {
-	        return callback(err);
-	      } // we get the updated note back, remove from caches and reparse..
+	          continue;
+	        } // em & strong
 
 
-	      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 (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
 
-	    if (_noteCache.inflightPost[note.id]) {
-	      return callback({
-	        message: 'Note update already inflight',
-	        status: -2
-	      }, note);
-	    }
 
-	    var action;
+	        if (token = this.tokenizer.codespan(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // br
 
-	    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 path = '/api/0.6/notes/' + note.id + '/' + action;
+	        if (token = this.tokenizer.br(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // del (gfm)
 
-	    if (note.newComment) {
-	      path += '?' + utilQsString({
-	        text: note.newComment
-	      });
-	    }
 
-	    _noteCache.inflightPost[note.id] = oauth.xhr({
-	      method: 'POST',
-	      path: path
-	    }, wrapcb(this, done, _connectionID));
+	        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
 
-	    function done(err, xml) {
-	      delete _noteCache.inflightPost[note.id];
 
-	      if (err) {
-	        return callback(err);
-	      } // we get the updated note back, remove from caches and reparse..
+	        if (token = this.tokenizer.autolink(src, mangle)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // url (gfm)
 
 
-	      this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
+	        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	      if (action === 'close') {
-	        _noteCache.closed[note.id] = true;
-	      } else if (action === 'reopen') {
-	        delete _noteCache.closed[note.id];
-	      }
 
-	      var options = {
-	        skipSeen: false
-	      };
-	      return parseXML(xml, function (err, results) {
-	        if (err) {
-	          return callback(err);
-	        } else {
-	          return callback(undefined, results[0]);
-	        }
-	      }, 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
+	        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+	          src = src.substring(token.raw.length);
 
-	    dispatch$6.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
+	          if (token.raw.slice(-1) !== '_') {
+	            // Track prevChar before string of ____ started
+	            prevChar = token.raw.slice(-1);
+	          }
+
+	          keepPrevChar = true;
+	          lastToken = tokens[tokens.length - 1];
+
+	          if (lastToken && lastToken.type === 'text') {
+	            lastToken.raw += token.raw;
+	            lastToken.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
+
+	          continue;
 	        }
-	      });
-	      return target;
-	    }
 
-	    if (!arguments.length) {
-	      return {
-	        tile: cloneCache(_tileCache),
-	        note: cloneCache(_noteCache),
-	        user: cloneCache(_userCache)
-	      };
-	    } // access caches directly for testing (e.g., loading notes rtree)
+	        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 (obj === 'get') {
+	      return tokens;
+	    }
+	  }], [{
+	    key: "rules",
+	    get: function get() {
 	      return {
-	        tile: _tileCache,
-	        note: _noteCache,
-	        user: _userCache
+	        block: block,
+	        inline: inline
 	      };
 	    }
+	    /**
+	     * Static Lex Method
+	     */
 
-	    if (obj.tile) {
-	      _tileCache = obj.tile;
-	      _tileCache.inflight = {};
-	    }
-
-	    if (obj.note) {
-	      _noteCache = obj.note;
-	      _noteCache.inflight = {};
-	      _noteCache.inflightPost = {};
+	  }, {
+	    key: "lex",
+	    value: function lex(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.lex(src);
 	    }
+	    /**
+	     * Static Lex Inline Method
+	     */
 
-	    if (obj.user) {
-	      _userCache = obj.user;
+	  }, {
+	    key: "lexInline",
+	    value: function lexInline(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.inlineTokens(src);
 	    }
+	  }]);
 
-	    return this;
-	  },
-	  logout: function logout() {
-	    _userChangesets = undefined;
-	    _userDetails = undefined;
-	    oauth.logout();
-	    dispatch$6.call('change');
-	    return this;
-	  },
-	  authenticated: function authenticated() {
-	    return oauth.authenticated();
-	  },
-	  authenticate: function authenticate(callback) {
-	    var that = this;
-	    var cid = _connectionID;
-	    _userChangesets = undefined;
-	    _userDetails = undefined;
-
-	    function done(err, res) {
-	      if (err) {
-	        if (callback) callback(err);
-	        return;
-	      }
-
-	      if (that.getConnectionId() !== cid) {
-	        if (callback) callback({
-	          message: 'Connection Switched',
-	          status: -1
-	        });
-	        return;
-	      }
+	  return Lexer;
+	}();
 
-	      _rateLimitError = undefined;
-	      dispatch$6.call('change');
-	      if (callback) callback(err, res);
-	      that.userChangesets(function () {}); // eagerly load user details/changesets
-	    }
+	var defaults$2 = defaults$5.exports.defaults;
+	var cleanUrl = helpers.cleanUrl,
+	    escape$2 = helpers.escape;
+	/**
+	 * Renderer
+	 */
 
-	    return oauth.authenticate(done);
-	  },
-	  imageryBlocklists: function imageryBlocklists() {
-	    return _imageryBlocklists;
-	  },
-	  tileZoom: function tileZoom(val) {
-	    if (!arguments.length) return _tileZoom$3;
-	    _tileZoom$3 = 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$3(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$3(encodeNoteRtree(note), true); // true = replace
+	var Renderer_1 = /*#__PURE__*/function () {
+	  function Renderer(options) {
+	    _classCallCheck$1(this, Renderer);
 
-	    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();
+	    this.options = options || defaults$2;
 	  }
-	};
-
-	var _apibase = 'https://wiki.openstreetmap.org/w/api.php';
-	var _inflight$1 = {};
-	var _wikibaseCache = {};
-	var _localeIDs = {
-	  en: false
-	};
-
-	var debouncedRequest = debounce(request, 500, {
-	  leading: false
-	});
 
-	function request(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);
-	  });
-	}
+	  _createClass$1(Renderer, [{
+	    key: "code",
+	    value: function code(_code, infostring, escaped) {
+	      var lang = (infostring || '').match(/\S*/)[0];
 
-	var serviceOsmWikibase = {
-	  init: function init() {
-	    _inflight$1 = {};
-	    _wikibaseCache = {};
-	    _localeIDs = {};
-	  },
-	  reset: function reset() {
-	    Object.values(_inflight$1).forEach(function (controller) {
-	      controller.abort();
-	    });
-	    _inflight$1 = {};
-	  },
+	      if (this.options.highlight) {
+	        var out = this.options.highlight(_code, lang);
 
-	  /**
-	   * 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 (out != null && out !== _code) {
+	          escaped = true;
+	          _code = out;
+	        }
 	      }
 
-	      if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
-	        localePick = stmt;
+	      _code = _code.replace(/\n$/, '') + '\n';
+
+	      if (!lang) {
+	        return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
 	      }
-	    });
-	    var result = localePick || preferredPick;
 
-	    if (result) {
-	      var datavalue = result.mainsnak.datavalue;
-	      return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-	    } else {
-	      return undefined;
+	      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
 
-	  /**
-	   * 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 : 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.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);
-	        }
-	      });
+	      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
+
+	  }, {
+	    key: "strong",
+	    value: function strong(text) {
+	      return '<strong>' + text + '</strong>';
 	    }
-
-	    if (rtypeSitelink) {
-	      if (_wikibaseCache[rtypeSitelink]) {
-	        result.rtype = _wikibaseCache[rtypeSitelink];
-	      } else {
-	        titles.push(rtypeSitelink);
-	      }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return '<em>' + text + '</em>';
 	    }
-
-	    if (keySitelink) {
-	      if (_wikibaseCache[keySitelink]) {
-	        result.key = _wikibaseCache[keySitelink];
-	      } else {
-	        titles.push(keySitelink);
-	      }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return '<code>' + text + '</code>';
 	    }
-
-	    if (tagSitelink) {
-	      if (_wikibaseCache[tagSitelink]) {
-	        result.tag = _wikibaseCache[tagSitelink];
-	      } else {
-	        titles.push(tagSitelink);
-	      }
+	  }, {
+	    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 (!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.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,
+	      if (href === null) {
+	        return text;
+	      }
 
-	    };
-	    var url = _apibase + '?' + 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;
+	      var out = '<a href="' + escape$2(href) + '"';
 
-	            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
-	            }
-	          }
-	        });
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	        if (localeSitelink) {
-	          // If locale ID is not found, store false to prevent repeated queries
-	          that.addLocale(params.langCodes[0], localeID);
-	        }
+	      out += '>' + text + '</a>';
+	      return out;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-	        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;
+	      if (href === null) {
+	        return text;
 	      }
 
-	      var entity = data.rtype || data.tag || data.key;
+	      var out = '<img src="' + href + '" alt="' + text + '"';
 
-	      if (!entity) {
-	        callback('No entity');
-	        return;
+	      if (title) {
+	        out += ' title="' + title + '"';
 	      }
 
-	      var i;
-	      var description;
+	      out += this.options.xhtml ? '/>' : '>';
+	      return out;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }]);
 
-	      for (i in langCodes) {
-	        var _code = langCodes[i];
+	  return Renderer;
+	}();
 
-	        if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
-	          description = entity.descriptions[_code];
-	          break;
-	        }
-	      }
+	var TextRenderer_1 = /*#__PURE__*/function () {
+	  function TextRenderer() {
+	    _classCallCheck$1(this, TextRenderer);
+	  }
 
-	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+	  _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 '';
+	    }
+	  }]);
 
-	      var result = {
-	        title: entity.title,
-	        description: description ? description.value : '',
-	        descriptionLocaleCode: description ? description.language : '',
-	        editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-	      }; // add image
+	  return TextRenderer;
+	}();
 
-	      if (entity.claims) {
-	        var imageroot;
-	        var image = that.claimToValue(entity, 'P4', langCodes[0]);
+	var Slugger_1 = /*#__PURE__*/function () {
+	  function Slugger() {
+	    _classCallCheck$1(this, Slugger);
 
-	        if (image) {
-	          imageroot = 'https://commons.wikimedia.org/w/index.php';
-	        } else {
-	          image = that.claimToValue(entity, 'P28', langCodes[0]);
+	    this.seen = {};
+	  }
 
-	          if (image) {
-	            imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-	          }
-	        }
+	  _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
+	     */
 
-	        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.
+	  }, {
+	    key: "getNextSafeSlug",
+	    value: function getNextSafeSlug(originalSlug, isDryRun) {
+	      var slug = originalSlug;
+	      var occurenceAccumulator = 0;
 
+	      if (this.seen.hasOwnProperty(slug)) {
+	        occurenceAccumulator = this.seen[originalSlug];
 
-	      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];
+	        do {
+	          occurenceAccumulator++;
+	          slug = originalSlug + '-' + occurenceAccumulator;
+	        } while (this.seen.hasOwnProperty(slug));
+	      }
 
-	      for (i in wikis) {
-	        var wiki = wikis[i];
+	      if (!isDryRun) {
+	        this.seen[originalSlug] = occurenceAccumulator;
+	        this.seen[slug] = 0;
+	      }
 
-	        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);
+	      return slug;
+	    }
+	    /**
+	     * Convert string to unique id
+	     * @param {object} options
+	     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+	     */
 
-	          if (info) {
-	            result.wiki = info;
-	            break;
-	          }
-	        }
+	  }, {
+	    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);
+	    }
+	  }]);
 
-	        if (result.wiki) break;
-	      }
+	  return Slugger;
+	}();
 
-	      callback(null, result); // Helper method to get wiki info if a given language exists
+	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
+	 */
 
-	      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;
-	    _apibase = val;
-	    return this;
+	var Parser_1 = /*#__PURE__*/function () {
+	  function Parser(options) {
+	    _classCallCheck$1(this, Parser);
+
+	    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
+	   */
 
-	var jsonpCache = {};
-	window.jsonpCache = jsonpCache;
-	function jsonpRequest(url, callback) {
-	  var request = {
-	    abort: function abort() {}
-	  };
 
-	  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);
+	  _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;
 
-	      request.abort = function () {
-	        window.clearTimeout(t);
-	      };
-	    }
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
 
-	    return request;
-	  }
+	        switch (token.type) {
+	          case 'space':
+	            {
+	              continue;
+	            }
 
-	  function rand() {
-	    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-	    var c = '';
-	    var i = -1;
+	          case 'hr':
+	            {
+	              out += this.renderer.hr();
+	              continue;
+	            }
 
-	    while (++i < 15) {
-	      c += chars.charAt(Math.floor(Math.random() * 52));
-	    }
+	          case 'heading':
+	            {
+	              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+	              continue;
+	            }
 
-	    return c;
-	  }
+	          case 'code':
+	            {
+	              out += this.renderer.code(token.text, token.lang, token.escaped);
+	              continue;
+	            }
 
-	  function create(url) {
-	    var e = url.match(/callback=(\w+)/);
-	    var c = e ? e[1] : rand();
+	          case 'table':
+	            {
+	              header = ''; // header
 
-	    jsonpCache[c] = function (data) {
-	      if (jsonpCache[c]) {
-	        callback(data);
-	      }
+	              cell = '';
+	              l2 = token.header.length;
 
-	      finalize();
-	    };
+	              for (j = 0; j < l2; j++) {
+	                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+	                  header: true,
+	                  align: token.align[j]
+	                });
+	              }
 
-	    function finalize() {
-	      delete jsonpCache[c];
-	      script.remove();
-	    }
+	              header += this.renderer.tablerow(cell);
+	              body = '';
+	              l2 = token.cells.length;
 
-	    request.abort = finalize;
-	    return 'jsonpCache.' + c;
-	  }
+	              for (j = 0; j < l2; j++) {
+	                row = token.tokens.cells[j];
+	                cell = '';
+	                l3 = row.length;
 
-	  var cb = create(url);
-	  var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
-	  return request;
-	}
+	                for (k = 0; k < l3; k++) {
+	                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
+	                    header: false,
+	                    align: token.align[k]
+	                  });
+	                }
 
-	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('loadedImages', 'viewerChanged');
-	var minHfov = 10; // zoom in degrees:  20, 10, 5
+	                body += this.renderer.tablerow(cell);
+	              }
 
-	var maxHfov = 90; // zoom out degrees
+	              out += this.renderer.table(header, body);
+	              continue;
+	            }
 
-	var defaultHfov = 45;
-	var _hires = false;
-	var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
+	          case 'blockquote':
+	            {
+	              body = this.parse(token.tokens);
+	              out += this.renderer.blockquote(body);
+	              continue;
+	            }
 
-	var _currScene = 0;
+	          case 'list':
+	            {
+	              ordered = token.ordered;
+	              start = token.start;
+	              loose = token.loose;
+	              l2 = token.items.length;
+	              body = '';
 
-	var _ssCache;
+	              for (j = 0; j < l2; j++) {
+	                item = token.items[j];
+	                checked = item.checked;
+	                task = item.task;
+	                itemBody = '';
 
-	var _pannellumViewer;
+	                if (item.task) {
+	                  checkbox = this.renderer.checkbox(checked);
 
-	var _sceneOptions = {
-	  showFullscreenCtrl: false,
-	  autoLoad: true,
-	  compass: true,
-	  yaw: 0,
-	  minHfov: minHfov,
-	  maxHfov: maxHfov,
-	  hfov: defaultHfov,
-	  type: 'cubemap',
-	  cubeMap: []
-	};
+	                  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;
+	                  }
+	                }
 
-	var _loadViewerPromise$2;
-	/**
-	 * abortRequest().
-	 */
+	                itemBody += this.parse(item.tokens, loose);
+	                body += this.renderer.listitem(itemBody, task, checked);
+	              }
 
+	              out += this.renderer.list(body, ordered, start);
+	              continue;
+	            }
 
-	function abortRequest$6(i) {
-	  i.abort();
-	}
-	/**
-	 * localeTimeStamp().
-	 */
+	          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;
+	            }
 
-	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.
-	 */
+	          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);
+	              }
 
-	function loadTiles$2(which, url, projection, margin) {
-	  var tiles = tiler$6.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
+	              out += top ? this.renderer.paragraph(body) : body;
+	              continue;
+	            }
 
-	  var cache = _ssCache[which];
-	  Object.keys(cache.inflight).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) {
-	      return k.indexOf(tile.id + ',') === 0;
-	    });
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	    if (!wanted) {
-	      abortRequest$6(cache.inflight[k]);
-	      delete cache.inflight[k];
-	    }
-	  });
-	  tiles.forEach(function (tile) {
-	    return loadNextTilePage$2(which, url, tile);
-	  });
-	}
-	/**
-	 * loadNextTilePage() load data for the next tile page in line.
-	 */
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
+	        }
+	      }
 
+	      return out;
+	    }
+	    /**
+	     * Parse Inline Tokens
+	     */
 
-	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;
-	  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
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, renderer) {
+	      renderer = renderer || this.renderer;
+	      var out = '',
+	          i,
+	          token;
+	      var l = tokens.length;
 
-	    bubbles.shift();
-	    var features = bubbles.map(function (bubble) {
-	      if (cache.points[bubble.id]) return null; // skip duplicates
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
 
-	      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
+	        switch (token.type) {
+	          case 'escape':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
-	      if (bubble.pr === undefined) {
-	        cache.leaders.push(bubble.id);
-	      }
+	          case 'html':
+	            {
+	              out += renderer.html(token.text);
+	              break;
+	            }
 
-	      return {
-	        minX: loc[0],
-	        minY: loc[1],
-	        maxX: loc[0],
-	        maxY: loc[1],
-	        data: d
-	      };
-	    }).filter(Boolean);
-	    cache.rtree.load(features);
-	    connectSequences();
+	          case 'link':
+	            {
+	              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	    if (which === 'bubbles') {
-	      dispatch$7.call('loadedImages');
-	    }
-	  });
-	} // call this sometimes to connect the bubbles into sequences
+	          case 'image':
+	            {
+	              out += renderer.image(token.href, token.title, token.text);
+	              break;
+	            }
 
+	          case 'strong':
+	            {
+	              out += renderer.strong(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	function connectSequences() {
-	  var cache = _ssCache.bubbles;
-	  var keepLeaders = [];
+	          case 'em':
+	            {
+	              out += renderer.em(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	  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.
+	          case 'codespan':
+	            {
+	              out += renderer.codespan(token.text);
+	              break;
+	            }
 
-	    var sequence = {
-	      key: bubble.key,
-	      bubbles: []
-	    };
-	    var complete = false;
+	          case 'br':
+	            {
+	              out += renderer.br();
+	              break;
+	            }
 
-	    do {
-	      sequence.bubbles.push(bubble);
-	      seen[bubble.key] = true;
+	          case 'del':
+	            {
+	              out += renderer.del(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	      if (bubble.ne === undefined) {
-	        complete = true;
-	      } else {
-	        bubble = cache.points[bubble.ne]; // advance to next
-	      }
-	    } while (bubble && !seen[bubble.key] && !complete);
+	          case 'text':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
-	    if (complete) {
-	      _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	      for (var j = 0; j < sequence.bubbles.length; j++) {
-	        sequence.bubbles[j].sequenceKey = sequence.key;
-	      } // create a GeoJSON LineString
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
+	        }
+	      }
 
+	      return out;
+	    }
+	  }], [{
+	    key: "parse",
+	    value: function parse(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parse(tokens);
+	    }
+	    /**
+	     * Static Parse Inline Method
+	     */
 
-	      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]);
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parseInline(tokens);
 	    }
-	  } // couldn't complete these, save for later
+	  }]);
 
+	  return Parser;
+	}();
 
-	  cache.leaders = keepLeaders;
-	}
+	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;
 	/**
-	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+	 * 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');
+	  }
 
-	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}'
-	  });
-	  return jsonpRequest(urlForRequest, function (data) {
-	    if (!data || data.error) {
-	      callback(null);
-	    } else {
-	      callback(data);
-	    }
-	  });
-	} // partition viewport into higher zoom tiles
-
+	  if (typeof src !== 'string') {
+	    throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	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 (typeof opt === 'function') {
+	    callback = opt;
+	    opt = null;
+	  }
 
-	  var tiler = utilTiler().zoomExtent([z2, z2]);
-	  return tiler.getTiles(projection).map(function (tile) {
-	    return tile.extent;
-	  });
-	} // no more than `limit` results per partition.
+	  opt = merge({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation(opt);
 
+	  if (callback) {
+	    var highlight = opt.highlight;
+	    var tokens;
 
-	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;
-	  }, []);
-	}
-	/**
-	 * loadImage()
-	 */
+	    try {
+	      tokens = Lexer.lex(src, opt);
+	    } catch (e) {
+	      return callback(e);
+	    }
 
+	    var done = function done(err) {
+	      var out;
 
-	function loadImage(imgInfo) {
-	  return new Promise(function (resolve) {
-	    var img = new Image();
+	      if (!err) {
+	        try {
+	          if (opt.walkTokens) {
+	            marked.walkTokens(tokens, opt.walkTokens);
+	          }
 
-	    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'
-	      });
-	    };
+	          out = Parser.parse(tokens, opt);
+	        } catch (e) {
+	          err = e;
+	        }
+	      }
 
-	    img.onerror = function () {
-	      resolve({
-	        data: imgInfo,
-	        status: 'error'
-	      });
+	      opt.highlight = highlight;
+	      return err ? callback(err) : callback(null, out);
 	    };
 
-	    img.setAttribute('crossorigin', '');
-	    img.src = imgInfo.url;
-	  });
-	}
-	/**
-	 * loadCanvas()
-	 */
-
+	    if (!highlight || highlight.length < 3) {
+	      return done();
+	    }
 
-	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()
-	 */
+	    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);
+	            }
 
+	            if (code != null && code !== token.text) {
+	              token.text = code;
+	              token.escaped = true;
+	            }
 
-	function loadFaces(faceGroup) {
-	  return Promise.all(faceGroup.map(loadCanvas)).then(function () {
-	    return {
-	      status: 'loadFaces done'
-	    };
-	  });
-	}
+	            pending--;
 
-	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
+	            if (pending === 0) {
+	              done();
+	            }
+	          });
+	        }, 0);
+	      }
+	    });
 
+	    if (pending === 0) {
+	      done();
+	    }
 
-	  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);
-	}
+	    return;
+	  }
 
-	function qkToXY(qk) {
-	  var x = 0;
-	  var y = 0;
-	  var scale = 256;
+	  try {
+	    var _tokens = Lexer.lex(src, opt);
 
-	  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;
-	  }
+	    if (opt.walkTokens) {
+	      marked.walkTokens(_tokens, opt.walkTokens);
+	    }
 
-	  return [x, y];
-	}
+	    return Parser.parse(_tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	function getQuadKeys() {
-	  var dim = _resolution / 256;
-	  var quadKeys;
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+	    }
 
-	  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'];
+	    throw e;
 	  }
-
-	  return quadKeys;
 	}
+	/**
+	 * Options
+	 */
 
-	var serviceStreetside = {
-	  /**
-	   * init() initialize streetside.
-	   */
-	  init: function init() {
-	    if (!_ssCache) {
-	      this.reset();
-	    }
 
-	    this.event = utilRebind(this, dispatch$7, 'on');
-	  },
+	marked.options = marked.setOptions = function (opt) {
+	  merge(marked.defaults, opt);
+	  changeDefaults(marked.defaults);
+	  return marked;
+	};
 
-	  /**
-	   * reset() reset the cache.
-	   */
-	  reset: function reset() {
-	    if (_ssCache) {
-	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
-	    }
+	marked.getDefaults = getDefaults;
+	marked.defaults = defaults;
+	/**
+	 * Use Extension
+	 */
 
-	    _ssCache = {
-	      bubbles: {
-	        inflight: {},
-	        loaded: {},
-	        nextPage: {},
-	        rtree: new RBush(),
-	        points: {},
-	        leaders: []
-	      },
-	      sequences: {}
-	    };
-	  },
+	marked.use = function (extension) {
+	  var opts = merge({}, extension);
+
+	  if (extension.renderer) {
+	    (function () {
+	      var renderer = marked.defaults.renderer || new Renderer();
 
-	  /**
-	   * bubbles()
-	   */
-	  bubbles: function bubbles(projection) {
-	    var limit = 5;
-	    return searchLimited$2(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
+	      var _loop = function _loop(prop) {
+	        var prevRenderer = renderer[prop];
 
-	    _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
-	      var key = d.data.sequenceKey;
+	        renderer[prop] = function () {
+	          for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+	            args[_key] = arguments[_key];
+	          }
 
-	      if (key && !seen[key]) {
-	        seen[key] = true;
-	        results.push(_ssCache.sequences[key].geojson);
-	      }
-	    });
+	          var ret = extension.renderer[prop].apply(renderer, args);
 
-	    return results;
-	  },
+	          if (ret === false) {
+	            ret = prevRenderer.apply(renderer, args);
+	          }
 
-	  /**
-	   * loadBubbles()
-	   */
-	  loadBubbles: function loadBubbles(projection, margin) {
-	    // by default: request 2 nearby tiles so we can connect sequences.
-	    if (margin === undefined) margin = 2;
-	    loadTiles$2('bubbles', bubbleApi, projection, margin);
-	  },
-	  viewer: function viewer() {
-	    return _pannellumViewer;
-	  },
-	  initViewer: function initViewer() {
-	    if (!window.pannellum) return;
-	    if (_pannellumViewer) return;
-	    _currScene += 1;
+	          return ret;
+	        };
+	      };
 
-	    var sceneID = _currScene.toString();
+	      for (var prop in extension.renderer) {
+	        _loop(prop);
+	      }
 
-	    var options = {
-	      'default': {
-	        firstScene: sceneID
-	      },
-	      scenes: {}
-	    };
-	    options.scenes[sceneID] = _sceneOptions;
-	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
-	  },
-	  ensureViewerLoaded: function ensureViewerLoaded(context) {
-	    if (_loadViewerPromise$2) return _loadViewerPromise$2; // create ms-wrapper, a photo wrapper class
+	      opts.renderer = renderer;
+	    })();
+	  }
 
-	    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)
+	  if (extension.tokenizer) {
+	    (function () {
+	      var tokenizer = marked.defaults.tokenizer || new Tokenizer();
 
-	    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
+	      var _loop2 = function _loop2(prop) {
+	        var prevTokenizer = tokenizer[prop];
 
-	    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.
+	        tokenizer[prop] = function () {
+	          for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+	            args[_key2] = arguments[_key2];
+	          }
 
-	      var t = timer(function (elapsed) {
-	        dispatch$7.call('viewerChanged');
+	          var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-	        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
+	          if (ret === false) {
+	            ret = prevTokenizer.apply(tokenizer, args);
+	          }
 
-	    wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
+	          return ret;
+	        };
+	      };
 
-	    context.ui().photoviewer.on('resize.streetside', function () {
-	      if (_pannellumViewer) {
-	        _pannellumViewer.resize();
+	      for (var prop in extension.tokenizer) {
+	        _loop2(prop);
 	      }
-	    });
-	    _loadViewerPromise$2 = new Promise(function (resolve, reject) {
-	      var loadedCount = 0;
 
-	      function loaded() {
-	        loadedCount += 1; // wait until both files are loaded
+	      opts.tokenizer = tokenizer;
+	    })();
+	  }
 
-	        if (loadedCount === 2) resolve();
+	  if (extension.walkTokens) {
+	    var walkTokens = marked.defaults.walkTokens;
+
+	    opts.walkTokens = function (token) {
+	      extension.walkTokens(token);
+
+	      if (walkTokens) {
+	        walkTokens(token);
 	      }
+	    };
+	  }
 
-	      var head = select('head'); // load streetside pannellum viewer css
+	  marked.setOptions(opts);
+	};
+	/**
+	 * Run callback for every token
+	 */
 
-	      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
 
-	      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$2 = null;
-	    });
-	    return _loadViewerPromise$2;
+	marked.walkTokens = function (tokens, callback) {
+	  var _iterator = _createForOfIteratorHelper(tokens),
+	      _step;
 
-	    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;
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var token = _step.value;
+	      callback(token);
 
-	        var yaw = _pannellumViewer.getYaw();
+	      switch (token.type) {
+	        case 'table':
+	          {
+	            var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+	                _step2;
 
-	        var ca = selected.ca + yaw;
-	        var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
+	            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 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
+	            var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+	                _step3;
 
-	        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
+	            try {
+	              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+	                var row = _step3.value;
 
-	        var minDist = Infinity;
+	                var _iterator4 = _createForOfIteratorHelper(row),
+	                    _step4;
 
-	        _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));
+	                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();
+	            }
 
-	          if (minTheta > 20) {
-	            dist += 5; // penalize distance if camera angles don't match
+	            break;
 	          }
 
-	          if (dist < minDist) {
-	            nextID = d.data.key;
-	            minDist = dist;
+	        case 'list':
+	          {
+	            marked.walkTokens(token.items, callback);
+	            break;
 	          }
-	        });
 
-	        var nextBubble = nextID && that.cachedImage(nextID);
-	        if (!nextBubble) return;
-	        context.map().centerEase(nextBubble.loc);
-	        that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
-	      };
+	        default:
+	          {
+	            if (token.tokens) {
+	              marked.walkTokens(token.tokens, callback);
+	            }
+	          }
+	      }
 	    }
-	  },
-	  yaw: function yaw(_yaw) {
-	    if (typeof _yaw !== 'number') return _yaw;
-	    _sceneOptions.yaw = _yaw;
-	    return this;
-	  },
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
+	};
+	/**
+	 * Parse Inline
+	 */
 
-	  /**
-	   * showViewer()
-	   */
-	  showViewer: function showViewer(context) {
-	    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);
-	      wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
-	    }
+	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');
+	  }
 
-	    return this;
-	  },
+	  if (typeof src !== 'string') {
+	    throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	  /**
-	   * 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);
-	  },
+	  opt = merge({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation(opt);
 
-	  /**
-	   * 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
+	  try {
+	    var tokens = Lexer.lexInline(src, opt);
 
-	    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
+	    if (opt.walkTokens) {
+	      marked.walkTokens(tokens, opt.walkTokens);
+	    }
 
-	    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('|');
+	    return Parser.parseInline(tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
 	    }
 
-	    if (d.captured_at) {
-	      captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
-	    } // Add image links
+	    throw e;
+	  }
+	};
+	/**
+	 * Expose
+	 */
 
 
-	    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;
+	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;
 
-	    for (var i = 0; i < paddingNeeded; i++) {
-	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
-	    }
+	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
 
-	    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 _cache;
 
-	    var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
+	function abortRequest$4(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	    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 abortUnwantedRequests$1(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
 	    });
-	    loadFaces(faces).then(function () {
-	      if (!_pannellumViewer) {
-	        that.initViewer();
-	      } else {
-	        // make a new scene
-	        _currScene += 1;
 
-	        var sceneID = _currScene.toString();
+	    if (!wanted) {
+	      abortRequest$4(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	        _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
+	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
 
 
-	        if (_currScene > 2) {
-	          sceneID = (_currScene - 1).toString();
+	function updateRtree$1(item, replace) {
+	  _cache.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	          _pannellumViewer.removeScene(sceneID);
-	        }
-	      }
+	  if (replace) {
+	    _cache.rtree.insert(item);
+	  }
+	} // Issues shouldn't obscure each other
+
+
+	function preventCoincident(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.rtree.search(bbox).length;
+	  } while (coincident);
+
+	  return loc;
+	}
+
+	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]);
+	      }, []);
 	    });
-	    return this;
-	  },
-	  getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
-	    return d && d.sequenceKey;
+
+	    if (!_cache) {
+	      this.reset();
+	    }
+
+	    this.event = utilRebind(this, dispatch$5, 'on');
 	  },
-	  // 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);
+	  reset: function reset() {
+	    var _strings = {};
+	    var _colors = {};
+
+	    if (_cache) {
+	      Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated
+
+	      _strings = _cache.strings;
+	      _colors = _cache.colors;
 	    }
 
-	    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
+	    _cache = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush(),
+	      strings: _strings,
+	      colors: _colors
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
+
+	    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
+
+	    var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
+
+	    abortUnwantedRequests$1(_cache, tiles); // issue new requests..
+
+	    tiles.forEach(function (tile) {
+	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
+
+	      var _tile$xyz = _slicedToArray(tile.xyz, 3),
+	          x = _tile$xyz[0],
+	          y = _tile$xyz[1],
+	          z = _tile$xyz[2];
+
+	      var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+
+	        if (data.features) {
+	          data.features.forEach(function (issue) {
+	            var _issue$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 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
+	            var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
 
-	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+	            if (itemType in _osmoseData.icons) {
+	              var loc = issue.geometry.coordinates; // lon, lat
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
+	              loc = preventCoincident(loc);
+	              var d = new QAItem(loc, _this, itemType, id, {
+	                item: item
+	              }); // Setting elems here prevents UI detail requests
 
-	      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 (item === 8300 || item === 8360) {
+	                d.elems = [];
+	              }
 
-	    return this;
-	  },
-	  updateUrlImage: function updateUrlImage(imageKey) {
-	    if (!window.mocha) {
-	      var hash = utilStringQs(window.location.hash);
+	              _cache.data[d.id] = d;
 
-	      if (imageKey) {
-	        hash.photo = 'streetside/' + imageKey;
-	      } else {
-	        delete hash.photo;
-	      }
+	              _cache.rtree.insert(encodeIssueRtree(d));
+	            }
+	          });
+	        }
 
-	      window.location.replace('#' + utilQsString(hash, true));
-	    }
+	        dispatch$5.call('loaded');
+	      })["catch"](function () {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+	      });
+	    });
 	  },
+	  loadIssueDetail: function loadIssueDetail(issue) {
+	    var _this2 = this;
 
-	  /**
-	   * cache().
-	   */
-	  cache: function cache() {
-	    return _ssCache;
-	  }
-	};
+	    // Issue details only need to be fetched once
+	    if (issue.elems !== undefined) {
+	      return Promise.resolve(issue);
+	    }
 
-	var _apibase$1 = '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'
-	};
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
 
-	function sets(params, n, o) {
-	  if (params.geometry && o[params.geometry]) {
-	    params[n] = o[params.geometry];
-	  }
+	    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
 
-	  return params;
-	}
+	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
 
-	function setFilter(params) {
-	  return sets(params, 'filter', tag_filters);
-	}
+	      _this2.replaceItem(issue);
+	    };
 
-	function setSort(params) {
-	  return sets(params, 'sortname', tag_sorts);
-	}
+	    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);
 
-	function setSortMembers(params) {
-	  return sets(params, 'sortname', tag_sort_members);
-	}
+	    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
 
-	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;
-	  };
-	}
+	    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
 
-	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;
-	  };
-	}
 
-	function filterValues(allowUpperCase) {
-	  return function (d) {
-	    if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
+	    var allRequests = items.map(function (itemType) {
+	      // No need to request data we already have
+	      if (itemType in _cache.strings[locale]) return null;
 
-	    if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
+	      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$categories$;
 
-	    return parseFloat(d.fraction) > 0.0;
-	  };
-	}
+	        var _cat$items = _slicedToArray(cat.items, 1),
+	            _cat$items$ = _cat$items[0],
+	            item = _cat$items$ === void 0 ? {
+	          "class": []
+	        } : _cat$items$;
 
-	function filterRoles(geometry) {
-	  return function (d) {
-	    if (d.role === '') return false; // exclude empty role
+	        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)
 
-	    if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
-	    return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-	  };
-	}
+	        if (!cl) {
+	          /* eslint-disable no-console */
+	          console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+	          /* eslint-enable no-console */
 
-	function valKey(d) {
-	  return {
-	    value: d.key,
-	    title: d.key
-	  };
-	}
+	          return;
+	        } // Cache served item colors to automatically style issue markers later
 
-	function valKeyDescription(d) {
-	  var obj = {
-	    value: d.value,
-	    title: d.description || d.value
-	  };
 
-	  if (d.count) {
-	    obj.count = d.count;
-	  }
+	        var itemInt = item.item,
+	            color = item.color;
 
-	  return obj;
-	}
+	        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
 
-	function roleKey(d) {
-	  return {
-	    value: d.role,
-	    title: d.role
-	  };
-	} // sort keys with ':' lower than keys without ':'
 
+	        var title = cl.title,
+	            detail = cl.detail,
+	            fix = cl.fix,
+	            trap = cl.trap; // Osmose titles shouldn't contain markdown
 
-	function sortKeys(a, b) {
-	  return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
-	}
+	        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;
+	      };
 
-	var debouncedRequest$1 = debounce(request$1, 300, {
-	  leading: false
-	});
+	      var _itemType$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
 
-	function request$1(url, params, exactMatch, callback, loaded) {
-	  if (_inflight$2[url]) return;
-	  if (checkCache(url, params, exactMatch, callback)) return;
-	  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);
-	  });
-	}
 
-	function checkCache(url, params, exactMatch, callback) {
-	  var rp = params.rp || 25;
-	  var testQuery = params.query || '';
-	  var testUrl = url;
+	      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;
 
-	  do {
-	    var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
+	    if (_cache.inflightPost[issue.id]) {
+	      return callback({
+	        message: 'Issue update already inflight',
+	        status: -2
+	      }, issue);
+	    } // UI sets the status to either 'done' or 'false'
 
-	    if (hit && (url === testUrl || hit.length < rp)) {
-	      callback(null, hit);
-	      return true;
-	    } // don't try to shorten the query
 
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+	    var controller = new AbortController();
 
-	    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)
+	    var after = function after() {
+	      delete _cache.inflightPost[issue.id];
 
-	    testQuery = testQuery.slice(0, -1);
-	    testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-	  } while (testQuery.length >= 0);
+	      _this3.removeItem(issue);
 
-	  return false;
-	}
+	      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;
+	        }
 
-	var serviceTaginfo = {
-	  init: function init() {
-	    _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
-	    }; // 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
+	        _cache.closed[issue.item] += 1;
+	      }
 
-	    var params = {
-	      rp: 100,
-	      sortname: 'values_all',
-	      sortorder: 'desc',
-	      page: 1,
-	      debounce: false,
-	      lang: _mainLocalizer.languageCode()
+	      if (callback) callback(null, issue);
 	    };
-	    this.keys(params, function (err, data) {
-	      if (err) return;
-	      data.forEach(function (d) {
-	        if (d.value === 'opening_hours') return; // exception
 
-	        _popularKeys[d.value] = true;
-	      });
+	    _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);
 	    });
 	  },
-	  reset: function reset() {
-	    Object.values(_inflight$2).forEach(function (controller) {
-	      controller.abort();
+	  // 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;
 	    });
-	    _inflight$2 = {};
 	  },
-	  keys: function keys(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);
-	    var url = _apibase$1 + '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);
-	      }
-	    });
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache.data[id];
 	  },
-	  multikeys: function multikeys(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$1 + '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);
-	      }
-	    });
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _osmoseData.icons[itemType];
 	  },
-	  values: function values(params, callback) {
-	    // Exclude popular keys from values lookups.. see #3955
-	    var key = params.key;
-
-	    if (key && _popularKeys[key]) {
-	      callback(null, []);
-	      return;
-	    }
+	  // 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
 
-	    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);
-	    var url = _apibase$1 + '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);
-	      }
-	    });
+	    return item;
 	  },
-	  roles: function roles(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$1 + '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);
-	      }
-	    });
+	  // 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
 	  },
-	  docs: function docs(params, callback) {
-	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	    params = clean(setSort(params));
-	    var path = 'key/wiki_pages?';
-
-	    if (params.value) {
-	      path = 'tag/wiki_pages?';
-	    } else if (params.rtype) {
-	      path = 'relation/wiki_pages?';
-	    }
-
-	    var url = _apibase$1 + path + utilQsString(params);
-	    doRequest(url, params, true, callback, function (err, d) {
-	      if (err) {
-	        callback(err);
-	      } else {
-	        _taginfoCache[url] = d.data;
-	        callback(null, d.data);
-	      }
-	    });
+	  // Used to populate `closed:osmose:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache.closed;
 	  },
-	  apibase: function apibase(_) {
-	    if (!arguments.length) return _apibase$1;
-	    _apibase$1 = _;
-	    return this;
+	  itemURL: function itemURL(item) {
+	    return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
 	  }
 	};
 
-	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}
-	   */
+	var ieee754$1 = {};
 
-	  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
-	   */
+	/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
 
-	  function feature(geom, properties, options) {
-	    if (options === void 0) {
-	      options = {};
-	    }
+	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;
 
-	    var feat = {
-	      type: "Feature"
-	    };
+	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-	    if (options.id === 0 || options.id) {
-	      feat.id = options.id;
-	    }
+	  m = e & (1 << -nBits) - 1;
+	  e >>= -nBits;
+	  nBits += mLen;
 
-	    if (options.bbox) {
-	      feat.bbox = options.bbox;
-	    }
+	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-	    feat.properties = properties || {};
-	    feat.geometry = geom;
-	    return feat;
+	  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;
 	  }
 
-	  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;
+	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+	};
 
-	      case "LineString":
-	        return lineString(coordinates).geometry;
+	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);
 
-	      case "Polygon":
-	        return polygon(coordinates).geometry;
+	  if (isNaN(value) || value === Infinity) {
+	    m = isNaN(value) ? 1 : 0;
+	    e = eMax;
+	  } else {
+	    e = Math.floor(Math.log(value) / Math.LN2);
 
-	      case "MultiPoint":
-	        return multiPoint(coordinates).geometry;
+	    if (value * (c = Math.pow(2, -e)) < 1) {
+	      e--;
+	      c *= 2;
+	    }
 
-	      case "MultiLineString":
-	        return multiLineString(coordinates).geometry;
+	    if (e + eBias >= 1) {
+	      value += rt / c;
+	    } else {
+	      value += rt * Math.pow(2, 1 - eBias);
+	    }
 
-	      case "MultiPolygon":
-	        return multiPolygon(coordinates).geometry;
+	    if (value * c >= 2) {
+	      e++;
+	      c /= 2;
+	    }
 
-	      default:
-	        throw new Error(type + " is invalid");
+	    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;
 	    }
 	  }
 
-	  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 = {};
-	    }
+	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-	    var geom = {
-	      type: "Point",
-	      coordinates: coordinates
-	    };
-	    return feature(geom, properties, options);
-	  }
+	  e = e << mLen | m;
+	  eLen += mLen;
 
-	  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
-	   */
+	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-	  function points(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
-	    }
+	  buffer[offset + i - d] |= s * 128;
+	};
 
-	    return featureCollection(coordinates.map(function (coords) {
-	      return point(coords, properties);
-	    }), options);
-	  }
+	var pbf = Pbf;
+	var ieee754 = ieee754$1;
 
-	  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 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;
+	}
 
-	  function polygon(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
-	    }
+	Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-	    for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-	      var ring = coordinates_1[_i];
+	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
-	      if (ring.length < 4) {
-	        throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-	      }
+	Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-	      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.");
-	        }
-	      }
-	    }
+	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-	    var geom = {
-	      type: "Polygon",
-	      coordinates: coordinates
-	    };
-	    return feature(geom, properties, options);
-	  }
+	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)
 
-	  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
-	   */
+	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 polygons(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
+	    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);
 	    }
 
-	    return featureCollection(coordinates.map(function (coords) {
-	      return polygon(coords, properties);
-	    }), options);
-	  }
+	    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;
 
-	  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
-	   */
+	    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 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");
-	    }
+	    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 || [];
 
-	    var geom = {
-	      type: "LineString",
-	      coordinates: coordinates
-	    };
-	    return feature(geom, properties, options);
-	  }
+	    while (this.pos < end) {
+	      arr.push(this.readVarint(isSigned));
+	    }
 
-	  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
-	   */
+	    return arr;
+	  },
+	  readPackedSVarint: function readPackedSVarint(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  function lineStrings(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
+	    while (this.pos < end) {
+	      arr.push(this.readSVarint());
 	    }
 
-	    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
-	   */
+	    return arr;
+	  },
+	  readPackedBoolean: function readPackedBoolean(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  function featureCollection(features, options) {
-	    if (options === void 0) {
-	      options = {};
+	    while (this.pos < end) {
+	      arr.push(this.readBoolean());
 	    }
 
-	    var fc = {
-	      type: "FeatureCollection"
-	    };
+	    return arr;
+	  },
+	  readPackedFloat: function readPackedFloat(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    if (options.id) {
-	      fc.id = options.id;
+	    while (this.pos < end) {
+	      arr.push(this.readFloat());
 	    }
 
-	    if (options.bbox) {
-	      fc.bbox = options.bbox;
-	    }
+	    return arr;
+	  },
+	  readPackedDouble: function readPackedDouble(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    fc.features = features;
-	    return fc;
-	  }
+	    while (this.pos < end) {
+	      arr.push(this.readDouble());
+	    }
 
-	  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
-	   */
+	    return arr;
+	  },
+	  readPackedFixed32: function readPackedFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  function multiLineString(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
+	    while (this.pos < end) {
+	      arr.push(this.readFixed32());
 	    }
 
-	    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
-	   */
+	    return arr;
+	  },
+	  readPackedSFixed32: function readPackedSFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  function multiPoint(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed32());
 	    }
 
-	    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
-	   *
-	   */
+	    return arr;
+	  },
+	  readPackedFixed64: function readPackedFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  function multiPolygon(coordinates, properties, options) {
-	    if (options === void 0) {
-	      options = {};
+	    while (this.pos < end) {
+	      arr.push(this.readFixed64());
 	    }
 
-	    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
-	   */
+	    return arr;
+	  },
+	  readPackedSFixed64: function readPackedSFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  function geometryCollection(geometries, properties, options) {
-	    if (options === void 0) {
-	      options = {};
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed64());
 	    }
 
-	    var geom = {
-	      type: "GeometryCollection",
-	      geometries: geometries
-	    };
-	    return feature(geom, properties, options);
-	  }
+	    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;
 
-	  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
-	   */
+	    while (length < this.pos + min) {
+	      length *= 2;
+	    }
 
-	  function round(num, precision) {
-	    if (precision === void 0) {
-	      precision = 0;
+	    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;
 
-	    if (precision && !(precision >= 0)) {
-	      throw new Error("precision must be a positive number");
+	    if (val > 0xfffffff || val < 0) {
+	      writeBigVarint(val, this);
+	      return;
 	    }
 
-	    var multiplier = Math.pow(10, precision || 0);
-	    return Math.round(num * multiplier) / multiplier;
-	  }
+	    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
 
-	  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
-	   */
+	    var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-	  function radiansToLength(radians, units) {
-	    if (units === void 0) {
-	      units = "kilometers";
-	    }
+	    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
 
-	    var factor = exports.factors[units];
+	    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);
 
-	    if (!factor) {
-	      throw new Error(units + " units is invalid");
+	    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
 
-	    return radians * factor;
+	    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));
 	  }
+	};
 
-	  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];
+	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');
+	}
 
-	    if (!factor) {
-	      throw new Error(units + " units is invalid");
-	    }
+	function readPackedEnd(pbf) {
+	  return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+	}
 
-	    return distance / factor;
+	function toNum(low, high, isSigned) {
+	  if (isSigned) {
+	    return high * 0x100000000 + (low >>> 0);
 	  }
 
-	  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));
-	  }
+	  return (high >>> 0) * 0x100000000 + (low >>> 0);
+	}
 
-	  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 writeBigVarint(val, pbf) {
+	  var low, high;
 
-	  function bearingToAzimuth(bearing) {
-	    var angle = bearing % 360;
+	  if (val >= 0) {
+	    low = val % 0x100000000 | 0;
+	    high = val / 0x100000000 | 0;
+	  } else {
+	    low = ~(-val % 0x100000000);
+	    high = ~(-val / 0x100000000);
 
-	    if (angle < 0) {
-	      angle += 360;
+	    if (low ^ 0xffffffff) {
+	      low = low + 1 | 0;
+	    } else {
+	      low = 0;
+	      high = high + 1 | 0;
 	    }
-
-	    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);
+	  if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+	    throw new Error('Given varint doesn\'t fit into 10 bytes');
 	  }
 
-	  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");
-	    }
+	  pbf.realloc(10);
+	  writeBigVarintLow(low, high, pbf);
+	  writeBigVarintHigh(high, pbf);
+	}
 
-	    var finalFactor = exports.areaFactors[finalUnit];
+	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;
+	}
 
-	    if (!finalFactor) {
-	      throw new Error("invalid final units");
-	    }
+	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;
+	}
 
-	    return area / startFactor * finalFactor;
-	  }
+	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
 
-	  exports.convertArea = convertArea;
-	  /**
-	   * isNumber
-	   *
-	   * @param {*} num Number to validate
-	   * @returns {boolean} true/false
-	   * @example
-	   * turf.isNumber(123)
-	   * //=true
-	   * turf.isNumber('foo')
-	   * //=false
-	   */
+	  pbf.realloc(extraLen);
 
-	  function isNumber(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
+	  for (var i = pbf.pos - 1; i >= startPos; i--) {
+	    pbf.buf[i + extraLen] = pbf.buf[i];
 	  }
+	}
 
-	  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;
+	function _writePackedVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeVarint(arr[i]);
 	  }
+	}
 
-	  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");
-	      }
-	    });
+	function _writePackedSVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSVarint(arr[i]);
 	  }
+	}
 
-	  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");
-	    }
+	function _writePackedFloat(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFloat(arr[i]);
 	  }
+	}
 
-	  exports.validateId = validateId; // Deprecated methods
-
-	  function radians2degrees() {
-	    throw new Error("method has been renamed to `radiansToDegrees`");
+	function _writePackedDouble(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeDouble(arr[i]);
 	  }
+	}
 
-	  exports.radians2degrees = radians2degrees;
-
-	  function degrees2radians() {
-	    throw new Error("method has been renamed to `degreesToRadians`");
+	function _writePackedBoolean(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeBoolean(arr[i]);
 	  }
+	}
 
-	  exports.degrees2radians = degrees2radians;
-
-	  function distanceToDegrees() {
-	    throw new Error("method has been renamed to `lengthToDegrees`");
+	function _writePackedFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed32(arr[i]);
 	  }
+	}
 
-	  exports.distanceToDegrees = distanceToDegrees;
-
-	  function distanceToRadians() {
-	    throw new Error("method has been renamed to `lengthToRadians`");
+	function _writePackedSFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed32(arr[i]);
 	  }
+	}
 
-	  exports.distanceToRadians = distanceToRadians;
-
-	  function radiansToDistance() {
-	    throw new Error("method has been renamed to `radiansToLength`");
+	function _writePackedFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed64(arr[i]);
 	  }
+	}
 
-	  exports.radiansToDistance = radiansToDistance;
-
-	  function bearingToAngle() {
-	    throw new Error("method has been renamed to `bearingToAzimuth`");
+	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
 
-	  exports.bearingToAngle = bearingToAngle;
 
-	  function convertDistance() {
-	    throw new Error("method has been renamed to `convertLength`");
-	  }
+	function readUInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+	}
 
-	  exports.convertDistance = convertDistance;
-	});
+	function writeInt32(buf, val, pos) {
+	  buf[pos] = val;
+	  buf[pos + 1] = val >>> 8;
+	  buf[pos + 2] = val >>> 16;
+	  buf[pos + 3] = val >>> 24;
+	}
 
-	var invariant = createCommonjsModule(function (module, exports) {
+	function readInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
+	}
 
-	  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 readUtf8(buf, pos, end) {
+	  var str = '';
+	  var i = pos;
 
-	  function getCoord(coord) {
-	    if (!coord) {
-	      throw new Error("coord is required");
-	    }
+	  while (i < end) {
+	    var b0 = buf[i];
+	    var c = null; // codepoint
 
-	    if (!Array.isArray(coord)) {
-	      if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-	        return coord.geometry.coordinates;
-	      }
+	    var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+	    if (i + bytesPerSequence > end) break;
+	    var b1, b2, b3;
 
-	      if (coord.type === "Point") {
-	        return coord.coordinates;
+	    if (bytesPerSequence === 1) {
+	      if (b0 < 0x80) {
+	        c = b0;
 	      }
-	    }
-
-	    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
+	    } else if (bytesPerSequence === 2) {
+	      b1 = buf[i + 1];
 
+	      if ((b1 & 0xC0) === 0x80) {
+	        c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-	    if (coords.type === "Feature") {
-	      if (coords.geometry !== null) {
-	        return coords.geometry.coordinates;
-	      }
-	    } else {
-	      // Geometry
-	      if (coords.coordinates) {
-	        return coords.coordinates;
+	        if (c <= 0x7F) {
+	          c = null;
+	        }
 	      }
-	    }
-
-	    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];
+	    } else if (bytesPerSequence === 3) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
 
-	      if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	        throw new Error("Invalid input to " + name + ", Feature with geometry required");
-	      }
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
 
-	      if (!feature.geometry || feature.geometry.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+	        if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+	          c = null;
+	        }
 	      }
-	    }
-	  }
-
-	  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"
-	   */
+	    } else if (bytesPerSequence === 4) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
+	      b3 = buf[i + 3];
 
-	  function getType(geojson, name) {
-	    if (geojson.type === "FeatureCollection") {
-	      return "FeatureCollection";
-	    }
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-	    if (geojson.type === "GeometryCollection") {
-	      return "GeometryCollection";
+	        if (c <= 0xFFFF || c >= 0x110000) {
+	          c = null;
+	        }
+	      }
 	    }
 
-	    if (geojson.type === "Feature" && geojson.geometry !== null) {
-	      return geojson.geometry.type;
+	    if (c === null) {
+	      c = 0xFFFD;
+	      bytesPerSequence = 1;
+	    } else if (c > 0xFFFF) {
+	      c -= 0x10000;
+	      str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+	      c = 0xDC00 | c & 0x3FF;
 	    }
 
-	    return geojson.type;
+	    str += String.fromCharCode(c);
+	    i += bytesPerSequence;
 	  }
 
-	  exports.getType = getType;
-	});
-
-	var lineclip_1 = lineclip;
-	var _default = lineclip;
-	lineclip.polyline = lineclip;
-	lineclip.polygon = polygonclip; // Cohen-Sutherland line clippign 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,
-	      a,
-	      b,
-	      codeB,
-	      lastCode;
-	  if (!result) result = [];
-
-	  for (i = 1; i < len; i++) {
-	    a = points[i - 1];
-	    b = points[i];
-	    codeB = lastCode = bitCode(b, bbox);
+	  return str;
+	}
 
-	    while (true) {
-	      if (!(codeA | codeB)) {
-	        // accept
-	        part.push(a);
+	function readUtf8TextDecoder(buf, pos, end) {
+	  return utf8TextDecoder.decode(buf.subarray(pos, end));
+	}
 
-	        if (codeB !== lastCode) {
-	          // segment went outside
-	          part.push(b);
+	function writeUtf8(buf, str, pos) {
+	  for (var i = 0, c, lead; i < str.length; i++) {
+	    c = str.charCodeAt(i); // code point
 
-	          if (i < len - 1) {
-	            // start a new line
-	            result.push(part);
-	            part = [];
-	          }
-	        } else if (i === len - 1) {
-	          part.push(b);
+	    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;
 	        }
-
-	        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;
-	  }
-
-	  if (part.length) result.push(part);
-	  return result;
-	} // Sutherland-Hodgeman polygon clipping algorithm
-
-
-	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);
-
-	    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
+	        if (c > 0xDBFF || i + 1 === str.length) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	        } else {
+	          lead = c;
+	        }
 
-	      prev = p;
-	      prevInside = inside;
+	        continue;
+	      }
+	    } else if (lead) {
+	      buf[pos++] = 0xEF;
+	      buf[pos++] = 0xBF;
+	      buf[pos++] = 0xBD;
+	      lead = null;
 	    }
 
-	    points = result;
-	    if (!points.length) break;
-	  }
-
-	  return result;
-	} // intersect a segment against one of the 4 lines that make up the bbox
-
-
-	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
-
-
-	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 (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;
+	        }
 
-	  if (p[1] < bbox[1]) code |= 4; // bottom
-	  else if (p[1] > bbox[3]) code |= 8; // top
+	        buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+	      }
 
-	  return code;
+	      buf[pos++] = c & 0x3F | 0x80;
+	    }
+	  }
+
+	  return pos;
 	}
-	lineclip_1["default"] = _default;
 
-	var bboxClip_1 = createCommonjsModule(function (module, exports) {
+	var vectorTile = {};
 
-	  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;
-	  };
+	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);
+	 */
 
-	  Object.defineProperty(exports, "__esModule", {
-	    value: true
-	  });
+	function Point$1(x, y) {
+	  this.x = x;
+	  this.y = y;
+	}
 
-	  var lineclip = __importStar(lineclip_1);
+	Point$1.prototype = {
 	  /**
-	   * 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]
+	   * 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);
+	  },
 
+	  /**
+	   * 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);
+	  },
 
-	  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 = [];
+	  /**
+	   * 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);
+	  },
 
-	        if (type === "LineString") {
-	          coords = [coords];
-	        }
+	  /**
+	   * 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);
+	  },
 
-	        coords.forEach(function (line) {
-	          lineclip.polyline(line, bbox, lines_1);
-	        });
+	  /**
+	   * 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);
+	  },
 
-	        if (lines_1.length === 1) {
-	          return helpers$1.lineString(lines_1[0], properties);
-	        }
+	  /**
+	   * 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);
+	  },
 
-	        return helpers$1.multiLineString(lines_1, properties);
+	  /**
+	   * 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);
+	  },
 
-	      case "Polygon":
-	        return helpers$1.polygon(clipPolygon(coords, bbox), properties);
+	  /**
+	   * 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);
+	  },
 
-	      case "MultiPolygon":
-	        return helpers$1.multiPolygon(coords.map(function (poly) {
-	          return clipPolygon(poly, bbox);
-	        }), properties);
+	  /**
+	   * 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);
+	  },
 
-	      default:
-	        throw new Error("geometry " + type + " not supported");
-	    }
-	  }
+	  /**
+	   * 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);
+	  },
 
-	  exports["default"] = bboxClip;
+	  /**
+	   * 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();
+	  },
 
-	  function clipPolygon(rings, bbox) {
-	    var outRings = [];
+	  /**
+	   * 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();
+	  },
 
-	    for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-	      var ring = rings_1[_i];
-	      var clipped = lineclip.polygon(ring, bbox);
+	  /**
+	   * 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();
+	  },
 
-	      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 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);
+	  },
 
-	        if (clipped.length >= 4) {
-	          outRings.push(clipped);
-	        }
-	      }
-	    }
+	  /**
+	   * 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 outRings;
-	  }
-	});
-	var turf_bboxClip = /*@__PURE__*/getDefaultExportFromCjs(bboxClip_1);
+	  /**
+	   * 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));
+	  },
 
-	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;
+	  /**
+	   * 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;
+	  },
 
-	  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);
+	  /**
+	   * 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);
+	  },
 
-	  var seen = [];
-	  return function stringify(node) {
-	    if (node && node.toJSON && typeof node.toJSON === 'function') {
-	      node = node.toJSON();
-	    }
+	  /**
+	   * 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);
+	  },
 
-	    if (node === undefined) return;
-	    if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
-	    if (_typeof(node) !== 'object') return JSON.stringify(node);
-	    var i, out;
+	  /**
+	   * 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);
+	  },
 
-	    if (Array.isArray(node)) {
-	      out = '[';
+	  /*
+	   * 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());
 
-	      for (i = 0; i < node.length; i++) {
-	        if (i) out += ',';
-	        out += stringify(node[i]) || 'null';
-	      }
+	    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);
+	 */
 
-	      return out + ']';
-	    }
+	Point$1.convert = function (a) {
+	  if (a instanceof Point$1) {
+	    return a;
+	  }
 
-	    if (node === null) return 'null';
+	  if (Array.isArray(a)) {
+	    return new Point$1(a[0], a[1]);
+	  }
 
-	    if (seen.indexOf(node) !== -1) {
-	      if (cycles) return JSON.stringify('__cycle__');
-	      throw new TypeError('Converting circular structure to JSON');
-	    }
+	  return a;
+	};
 
-	    var seenIndex = seen.push(node) - 1;
-	    var keys = Object.keys(node).sort(cmp && cmp(node));
-	    out = '';
+	var Point = pointGeometry;
+	var vectortilefeature = VectorTileFeature$1;
 
-	    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;
-	    }
+	function VectorTileFeature$1(pbf, end, extent, keys, values) {
+	  // Public
+	  this.properties = {};
+	  this.extent = extent;
+	  this.type = 0; // Private
 
-	    seen.splice(seenIndex, 1);
-	    return '{' + out + '}';
-	  }(data);
-	};
+	  this._pbf = pbf;
+	  this._geometry = -1;
+	  this._keys = keys;
+	  this._values = values;
+	  pbf.readFields(readFeature, this, end);
+	}
 
-	function DEFAULT_COMPARE(a, b) {
-	  return a > b ? 1 : a < b ? -1 : 0;
+	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;
 	}
 
-	var SplayTree = /*#__PURE__*/function () {
-	  function SplayTree() {
-	    var compare = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE;
-	    var noDuplicates = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+	function readTag(pbf, feature) {
+	  var end = pbf.readVarint() + pbf.pos;
 
-	    _classCallCheck(this, SplayTree);
+	  while (pbf.pos < end) {
+	    var key = feature._keys[pbf.readVarint()],
+	        value = feature._values[pbf.readVarint()];
 
-	    this._compare = compare;
-	    this._root = null;
-	    this._size = 0;
-	    this._noDuplicates = !!noDuplicates;
+	    feature.properties[key] = value;
 	  }
+	}
 
-	  _createClass(SplayTree, [{
-	    key: "rotateLeft",
-	    value: function rotateLeft(x) {
-	      var y = x.right;
-
-	      if (y) {
-	        x.right = y.left;
-	        if (y.left) y.left.parent = x;
-	        y.parent = x.parent;
-	      }
-
-	      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;
-	    }
-	  }, {
-	    key: "rotateRight",
-	    value: function rotateRight(x) {
-	      var y = x.left;
+	VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-	      if (y) {
-	        x.left = y.right;
-	        if (y.right) y.right.parent = x;
-	        y.parent = x.parent;
-	      }
+	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;
 
-	      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;
-	    }
-	  }, {
-	    key: "_splay",
-	    value: 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);
-	        }
-	      }
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
 	    }
-	  }, {
-	    key: "splay",
-	    value: function splay(x) {
-	      var p, gp, ggp, l, r;
-
-	      while (x.parent) {
-	        p = x.parent;
-	        gp = p.parent;
-
-	        if (gp && gp.parent) {
-	          ggp = gp.parent;
-	          if (ggp.left === gp) ggp.left = x;else ggp.right = x;
-	          x.parent = ggp;
-	        } else {
-	          x.parent = null;
-	          this._root = x;
-	        }
-
-	        l = x.left;
-	        r = x.right;
-
-	        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;
-
-	              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;
-
-	              x.right = gp;
-	              gp.parent = x;
-	            }
-	          }
+	    length--;
 
-	          if (l) {
-	            p.right = l;
-	            l.parent = p;
-	          } else p.right = null;
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
 
-	          x.left = p;
-	          p.parent = x;
-	        }
-	      }
-	    }
-	  }, {
-	    key: "replace",
-	    value: 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;
-	    }
-	  }, {
-	    key: "minNode",
-	    value: function minNode() {
-	      var u = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-	      if (u) while (u.left) {
-	        u = u.left;
-	      }
-	      return u;
-	    }
-	  }, {
-	    key: "maxNode",
-	    value: function maxNode() {
-	      var u = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-	      if (u) while (u.right) {
-	        u = u.right;
-	      }
-	      return u;
-	    }
-	  }, {
-	    key: "insert",
-	    value: function insert(key, data) {
-	      var z = this._root;
-	      var p = null;
-	      var comp = this._compare;
-	      var cmp;
-
-	      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 (cmd === 1) {
+	        // moveTo
+	        if (line) lines.push(line);
+	        line = [];
 	      }
 
-	      z = {
-	        key: key,
-	        data: data,
-	        left: null,
-	        right: null,
-	        parent: p
-	      };
-	      if (!p) this._root = z;else if (comp(p.key, z.key) < 0) p.right = z;else p.left = z;
-	      this.splay(z);
-	      this._size++;
-	      return z;
-	    }
-	  }, {
-	    key: "find",
-	    value: 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;
+	      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
 	      }
-
-	      return null;
+	    } else {
+	      throw new Error('unknown command ' + cmd);
 	    }
-	    /**
-	     * Whether the tree contains a node with the given key
-	     * @param  {Key} key
-	     * @return {boolean} true/false
-	     */
-
-	  }, {
-	    key: "contains",
-	    value: 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;
-	      }
+	  }
 
-	      return false;
-	    }
-	  }, {
-	    key: "remove",
-	    value: function remove(key) {
-	      var z = this.find(key);
-	      if (!z) return false;
-	      this.splay(z);
-	      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 (line) lines.push(line);
+	  return lines;
+	};
 
-	        if (y.parent !== z) {
-	          this.replace(y, y.right);
-	          y.right = z.right;
-	          y.right.parent = y;
-	        }
+	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;
 
-	        this.replace(z, y);
-	        y.left = z.left;
-	        y.left.parent = y;
-	      }
-	      this._size--;
-	      return true;
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
 	    }
-	  }, {
-	    key: "removeNode",
-	    value: function removeNode(z) {
-	      if (!z) return false;
-	      this.splay(z);
-	      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;
-	        }
+	    length--;
 
-	        this.replace(z, y);
-	        y.left = z.left;
-	        y.left.parent = y;
-	      }
-	      this._size--;
-	      return true;
+	    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);
 	    }
-	  }, {
-	    key: "erase",
-	    value: function erase(key) {
-	      var z = this.find(key);
-	      if (!z) return;
-	      this.splay(z);
-	      var s = z.left;
-	      var t = z.right;
-	      var sMax = null;
+	  }
 
-	      if (s) {
-	        s.parent = null;
-	        sMax = this.maxNode(s);
-	        this.splay(sMax);
-	        this._root = sMax;
-	      }
+	  return [x1, y1, x2, y2];
+	};
 
-	      if (t) {
-	        if (s) sMax.right = t;else this._root = t;
-	        t.parent = sMax;
-	      }
+	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;
 
-	      this._size--;
+	  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];
 	    }
-	    /**
-	     * Removes and returns the node with smallest key
-	     * @return {?Node}
-	     */
-
-	  }, {
-	    key: "pop",
-	    value: function pop() {
-	      var node = this._root,
-	          returnValue = null;
+	  }
 
-	      if (node) {
-	        while (node.left) {
-	          node = node.left;
-	        }
+	  switch (this.type) {
+	    case 1:
+	      var points = [];
 
-	        returnValue = {
-	          key: node.key,
-	          data: node.data
-	        };
-	        this.remove(node.key);
+	      for (i = 0; i < coords.length; i++) {
+	        points[i] = coords[i][0];
 	      }
 
-	      return returnValue;
-	    }
-	    /* eslint-disable class-methods-use-this */
-
-	    /**
-	     * Successor node
-	     * @param  {Node} node
-	     * @return {?Node}
-	     */
+	      coords = points;
+	      project(coords);
+	      break;
 
-	  }, {
-	    key: "next",
-	    value: function next(node) {
-	      var successor = node;
+	    case 2:
+	      for (i = 0; i < coords.length; i++) {
+	        project(coords[i]);
+	      }
 
-	      if (successor) {
-	        if (successor.right) {
-	          successor = successor.right;
+	      break;
 
-	          while (successor && successor.left) {
-	            successor = successor.left;
-	          }
-	        } else {
-	          successor = node.parent;
+	    case 3:
+	      coords = classifyRings(coords);
 
-	          while (successor && successor.right === node) {
-	            node = successor;
-	            successor = successor.parent;
-	          }
+	      for (i = 0; i < coords.length; i++) {
+	        for (j = 0; j < coords[i].length; j++) {
+	          project(coords[i][j]);
 	        }
 	      }
 
-	      return successor;
-	    }
-	    /**
-	     * Predecessor node
-	     * @param  {Node} node
-	     * @return {?Node}
-	     */
+	      break;
+	  }
 
-	  }, {
-	    key: "prev",
-	    value: function prev(node) {
-	      var predecessor = node;
+	  if (coords.length === 1) {
+	    coords = coords[0];
+	  } else {
+	    type = 'Multi' + type;
+	  }
 
-	      if (predecessor) {
-	        if (predecessor.left) {
-	          predecessor = predecessor.left;
+	  var result = {
+	    type: "Feature",
+	    geometry: {
+	      type: type,
+	      coordinates: coords
+	    },
+	    properties: this.properties
+	  };
 
-	          while (predecessor && predecessor.right) {
-	            predecessor = predecessor.right;
-	          }
-	        } else {
-	          predecessor = node.parent;
+	  if ('id' in this) {
+	    result.id = this.id;
+	  }
 
-	          while (predecessor && predecessor.left === node) {
-	            node = predecessor;
-	            predecessor = predecessor.parent;
-	          }
-	        }
-	      }
+	  return result;
+	}; // classifies an array of rings into polygons with outer rings and holes
 
-	      return predecessor;
-	    }
-	    /* eslint-enable class-methods-use-this */
 
-	    /**
-	     * @param  {forEachCallback} callback
-	     * @return {SplayTree}
-	     */
+	function classifyRings(rings) {
+	  var len = rings.length;
+	  if (len <= 1) return [rings];
+	  var polygons = [],
+	      polygon,
+	      ccw;
 
-	  }, {
-	    key: "forEach",
-	    value: function forEach(callback) {
-	      var current = this._root;
-	      var s = [],
-	          done = false,
-	          i = 0;
+	  for (var i = 0; i < len; i++) {
+	    var area = signedArea(rings[i]);
+	    if (area === 0) continue;
+	    if (ccw === undefined) ccw = area < 0;
 
-	      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
+	    if (ccw === area < 0) {
+	      if (polygon) polygons.push(polygon);
+	      polygon = [rings[i]];
+	    } else {
+	      polygon.push(rings[i]);
+	    }
+	  }
 
-	            current = current.right;
-	          } else done = true;
-	        }
-	      }
+	  if (polygon) polygons.push(polygon);
+	  return polygons;
+	}
 
-	      return this;
-	    }
-	    /**
-	     * 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}
-	     */
+	function signedArea(ring) {
+	  var sum = 0;
 
-	  }, {
-	    key: "range",
-	    value: function range(low, high, fn, ctx) {
-	      var Q = [];
-	      var compare = this._compare;
-	      var node = this._root,
-	          cmp;
-
-	      while (Q.length !== 0 || node) {
-	        if (node) {
-	          Q.push(node);
-	          node = node.left;
-	        } else {
-	          node = Q.pop();
-	          cmp = compare(node.key, high);
+	  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);
+	  }
 
-	          if (cmp > 0) {
-	            break;
-	          } else if (compare(node.key, low) >= 0) {
-	            if (fn.call(ctx, node)) return this; // stop if smth is returned
-	          }
+	  return sum;
+	}
 
-	          node = node.right;
-	        }
-	      }
+	var VectorTileFeature = vectortilefeature;
+	var vectortilelayer = VectorTileLayer$1;
 
-	      return this;
-	    }
-	    /**
-	     * Returns all keys in order
-	     * @return {Array<Key>}
-	     */
+	function VectorTileLayer$1(pbf, end) {
+	  // Public
+	  this.version = 1;
+	  this.name = null;
+	  this.extent = 4096;
+	  this.length = 0; // Private
 
-	  }, {
-	    key: "keys",
-	    value: function keys() {
-	      var current = this._root;
-	      var s = [],
-	          r = [],
-	          done = false;
-
-	      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;
-	        }
-	      }
+	  this._pbf = pbf;
+	  this._keys = [];
+	  this._values = [];
+	  this._features = [];
+	  pbf.readFields(readLayer, this, end);
+	  this.length = this._features.length;
+	}
 
-	      return r;
-	    }
-	    /**
-	     * Returns `data` fields of all nodes in order.
-	     * @return {Array<Value>}
-	     */
+	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));
+	}
 
-	  }, {
-	    key: "values",
-	    value: function values() {
-	      var current = this._root;
-	      var s = [],
-	          r = [],
-	          done = false;
-
-	      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;
-	        }
-	      }
+	function readValueMessage(pbf) {
+	  var value = null,
+	      end = pbf.readVarint() + pbf.pos;
 
-	      return r;
-	    }
-	    /**
-	     * Returns node at given index
-	     * @param  {number} index
-	     * @return {?Node}
-	     */
+	  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;
+	  }
 
-	  }, {
-	    key: "at",
-	    value: function at(index) {
-	      // removed after a consideration, more misleading than useful
-	      // index = index % this.size;
-	      // if (index < 0) index = this.size - index;
-	      var current = this._root;
-	      var s = [],
-	          done = false,
-	          i = 0;
+	  return value;
+	} // return feature `i` from this layer as a `VectorTileFeature`
 
-	      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;
-	        }
-	      }
 
-	      return null;
-	    }
-	    /**
-	     * 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}
-	     */
+	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];
 
-	  }, {
-	    key: "load",
-	    value: function load() {
-	      var keys = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
-	      var values = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-	      var presort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 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;
-	    }
-	  }, {
-	    key: "min",
-	    value: function min() {
-	      var node = this.minNode(this._root);
-	      if (node) return node.key;else return null;
-	    }
-	  }, {
-	    key: "max",
-	    value: function max() {
-	      var node = this.maxNode(this._root);
-	      if (node) return node.key;else return null;
-	    }
-	  }, {
-	    key: "isEmpty",
-	    value: function isEmpty() {
-	      return this._root === null;
-	    }
-	  }, {
-	    key: "size",
-	    get: function get() {
-	      return this._size;
-	    }
-	    /**
-	     * 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}
-	     */
+	  var end = this._pbf.readVarint() + this._pbf.pos;
 
-	  }], [{
-	    key: "createTree",
-	    value: function createTree(keys, values, comparator, presort, noDuplicates) {
-	      return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-	    }
-	  }]);
+	  return new VectorTileFeature(this._pbf, end, this.extent, this._keys, this._values);
+	};
 
-	  return SplayTree;
-	}();
+	var VectorTileLayer = vectortilelayer;
+	var vectortile = VectorTile$1;
 
-	function loadRecursive(parent, keys, values, start, end) {
-	  var size = end - start;
+	function VectorTile$1(pbf, end) {
+	  this.layers = pbf.readFields(readTile, {}, end);
+	}
 
-	  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;
+	function readTile(tag, layers, pbf) {
+	  if (tag === 3) {
+	    var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
+	    if (layer.length) layers[layer.name] = layer;
 	  }
-
-	  return null;
 	}
 
-	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;
+	var VectorTile = vectorTile.VectorTile = vectortile;
+	vectorTile.VectorTileFeature = vectortilefeature;
+	vectorTile.VectorTileLayer = vectortilelayer;
 
-	  while (true) {
-	    do {
-	      i++;
-	    } while (compare(keys[i], pivot) < 0);
+	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');
 
-	    do {
-	      j--;
-	    } while (compare(keys[j], pivot) > 0);
+	var _loadViewerPromise$2;
 
-	    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;
-	  }
+	var _mlyActiveImage;
 
-	  sort(keys, values, left, j, compare);
-	  sort(keys, values, j + 1, right, compare);
-	}
+	var _mlyCache;
 
-	var NORMAL = 0;
-	var NON_CONTRIBUTING = 1;
-	var SAME_TRANSITION = 2;
-	var DIFFERENT_TRANSITION = 3;
+	var _mlyFallback = false;
 
-	var INTERSECTION = 0;
-	var UNION = 1;
-	var DIFFERENCE = 2;
-	var XOR = 3;
+	var _mlyHighlightedDetection;
 
-	/**
-	 * @param  {SweepEvent} event
-	 * @param  {SweepEvent} prev
-	 * @param  {Operation} operation
-	 */
+	var _mlyShowFeatureDetections = false;
+	var _mlyShowSignDetections = false;
 
-	function computeFields(event, prev, operation) {
-	  // compute inOut and otherInOut fields
-	  if (prev === null) {
-	    event.inOut = false;
-	    event.otherInOut = true; // previous line segment in sweepline belongs to the same polygon
-	  } else {
-	    if (event.isSubject === prev.isSubject) {
-	      event.inOut = !prev.inOut;
-	      event.otherInOut = prev.otherInOut; // previous line segment in sweepline belongs to the clipping polygon
-	    } else {
-	      event.inOut = !prev.otherInOut;
-	      event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
-	    } // compute prevInResult field
+	var _mlyViewer;
+
+	var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles
+
+	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
 
 
-	    if (prev) {
-	      event.prevInResult = !inResult(prev, operation) || prev.isVertical() ? prev.prevInResult : prev;
+	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);
 	    }
-	  } // check if the line segment belongs to the Boolean operation
 
+	    cache.loaded[tileId] = true;
+	    delete cache.inflight[tileId];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
 
-	  var isInResult = inResult(event, operation);
+	    loadTileDataToCache(data, tile, which);
 
-	  if (isInResult) {
-	    event.resultTransition = determineResultTransition(event, operation);
-	  } else {
-	    event.resultTransition = 0;
-	  }
-	}
-	/* eslint-disable indent */
+	    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
 
-	function inResult(event, operation) {
-	  switch (event.type) {
-	    case NORMAL:
-	      switch (operation) {
-	        case INTERSECTION:
-	          return !event.otherInOut;
 
-	        case UNION:
-	          return event.otherInOut;
+	function loadTileDataToCache(data, tile, which) {
+	  var vectorTile = new VectorTile(new pbf(data));
+	  var features, cache, layer, i, feature, loc, d;
 
-	        case DIFFERENCE:
-	          // return (event.isSubject && !event.otherInOut) ||
-	          //         (!event.isSubject && event.otherInOut);
-	          return event.isSubject && event.otherInOut || !event.isSubject && !event.otherInOut;
+	  if (vectorTile.layers.hasOwnProperty('image')) {
+	    features = [];
+	    cache = _mlyCache.images;
+	    layer = vectorTile.layers.image;
 
-	        case XOR:
-	          return true;
-	      }
+	    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
+	      });
+	    }
 
-	      break;
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
+	    }
+	  }
 
-	    case SAME_TRANSITION:
-	      return operation === INTERSECTION || operation === UNION;
+	  if (vectorTile.layers.hasOwnProperty('sequence')) {
+	    features = [];
+	    cache = _mlyCache.sequences;
+	    layer = vectorTile.layers.sequence;
 
-	    case DIFFERENT_TRANSITION:
-	      return operation === DIFFERENCE;
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
 
-	    case NON_CONTRIBUTING:
-	      return false;
+	      if (cache.lineString[feature.properties.id]) {
+	        cache.lineString[feature.properties.id].push(feature);
+	      } else {
+	        cache.lineString[feature.properties.id] = [feature];
+	      }
+	    }
 	  }
 
-	  return false;
-	}
-	/* eslint-enable indent */
+	  if (vectorTile.layers.hasOwnProperty('point')) {
+	    features = [];
+	    cache = _mlyCache[which];
+	    layer = vectorTile.layers.point;
 
+	    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 determineResultTransition(event, operation) {
-	  var thisIn = !event.inOut;
-	  var thatIn = !event.otherInOut;
-	  var isIn;
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
+	    }
+	  }
 
-	  switch (operation) {
-	    case INTERSECTION:
-	      isIn = thisIn && thatIn;
-	      break;
+	  if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+	    features = [];
+	    cache = _mlyCache[which];
+	    layer = vectorTile.layers.traffic_sign;
 
-	    case UNION:
-	      isIn = thisIn || thatIn;
-	      break;
+	    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
+	      });
+	    }
 
-	    case XOR:
-	      isIn = thisIn ^ thatIn;
-	      break;
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
+	    }
+	  }
+	} // Get data from the API
 
-	    case DIFFERENCE:
-	      if (event.isSubject) {
-	        isIn = thisIn && !thatIn;
-	      } else {
-	        isIn = thatIn && !thisIn;
-	      }
 
-	      break;
-	  }
+	function loadData(url) {
+	  return fetch(url).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
+	    }
 
-	  return isIn ? +1 : -1;
-	}
+	    return response.json();
+	  }).then(function (result) {
+	    if (!result) {
+	      return [];
+	    }
 
-	var SweepEvent = /*#__PURE__*/function () {
-	  /**
-	   * Sweepline event
-	   *
-	   * @class {SweepEvent}
-	   * @param {Array.<Number>}  point
-	   * @param {Boolean}         left
-	   * @param {SweepEvent=}     otherEvent
-	   * @param {Boolean}         isSubject
-	   * @param {Number}          edgeType
-	   */
-	  function SweepEvent(point, left, otherEvent, isSubject, edgeType) {
-	    _classCallCheck(this, SweepEvent);
+	    return result.data || [];
+	  });
+	} // Partition viewport into higher zoom tiles
 
-	    /**
-	     * Is left endpoint?
-	     * @type {Boolean}
-	     */
-	    this.left = left;
-	    /**
-	     * @type {Array.<Number>}
-	     */
 
-	    this.point = point;
-	    /**
-	     * Other edge reference
-	     * @type {SweepEvent}
-	     */
+	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
 
-	    this.otherEvent = otherEvent;
-	    /**
-	     * Belongs to source or clipping polygon
-	     * @type {Boolean}
-	     */
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // Return no more than `limit` results per partition.
 
-	    this.isSubject = isSubject;
-	    /**
-	     * Edge contribution type
-	     * @type {Number}
-	     */
 
-	    this.type = edgeType || NORMAL;
-	    /**
-	     * In-out transition for the sweepline crossing polygon
-	     * @type {Boolean}
-	     */
+	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;
+	  }, []);
+	}
 
-	    this.inOut = false;
-	    /**
-	     * @type {Boolean}
-	     */
+	var serviceMapillary = {
+	  // Initialize Mapillary
+	  init: function init() {
+	    if (!_mlyCache) {
+	      this.reset();
+	    }
 
-	    this.otherInOut = false;
-	    /**
-	     * Previous event in result?
-	     * @type {SweepEvent}
-	     */
+	    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();
+	      });
+	    }
 
-	    this.prevInResult = null;
-	    /**
-	     * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-	     * @type {Number}
-	     */
+	    _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 = [];
 
-	    this.resultTransition = 0; // connection step
+	    _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+	      if (d.data.sequence_id) {
+	        sequenceIds[d.data.sequence_id] = true;
+	      }
+	    });
 
-	    /**
-	     * @type {Number}
-	     */
+	    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
 
-	    this.otherPos = -1;
-	    /**
-	     * @type {Number}
-	     */
+	    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;
 
-	    this.outputContourId = -1;
-	    this.isExteriorRing = true; // TODO: Looks unused, remove?
-	  }
-	  /**
-	   * @param  {Array.<Number>}  p
-	   * @return {Boolean}
-	   */
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
+	        if (loadedCount === 2) resolve();
+	      }
 
-	  _createClass(SweepEvent, [{
-	    key: "isBelow",
-	    value: 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 head = select('head'); // load mapillary-viewercss
+
+	      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
+
+	      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();
 	    }
-	    /**
-	     * @param  {Array.<Number>}  p
-	     * @return {Boolean}
-	     */
+	  },
+	  // Show map feature detections in image viewer
+	  showFeatureDetections: function showFeatureDetections(value) {
+	    _mlyShowFeatureDetections = value;
 
-	  }, {
-	    key: "isAbove",
-	    value: function isAbove(p) {
-	      return !this.isBelow(p);
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
 	    }
-	    /**
-	     * @return {Boolean}
-	     */
+	  },
+	  // Show traffic sign detections in image viewer
+	  showSignDetections: function showSignDetections(value) {
+	    _mlyShowSignDetections = value;
 
-	  }, {
-	    key: "isVertical",
-	    value: function isVertical() {
-	      return this.point[0] === this.otherEvent.point[0];
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
 	    }
-	    /**
-	     * Does event belong to result?
-	     * @return {Boolean}
-	     */
+	  },
+	  // 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]);
 
-	  }, {
-	    key: "clone",
-	    value: function clone() {
-	      var copy = new SweepEvent(this.point, this.left, this.otherEvent, this.isSubject, this.type);
-	      copy.contourId = this.contourId;
-	      copy.resultTransition = this.resultTransition;
-	      copy.prevInResult = this.prevInResult;
-	      copy.isExteriorRing = this.isExteriorRing;
-	      copy.inOut = this.inOut;
-	      copy.otherInOut = this.otherInOut;
-	      return copy;
-	    }
-	  }, {
-	    key: "inResult",
-	    get: function get() {
-	      return this.resultTransition !== 0;
+	    if (fromDate) {
+	      filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
 	    }
-	  }]);
-
-	  return SweepEvent;
-	}();
 
-	function equals(p1, p2) {
-	  if (p1[0] === p2[0]) {
-	    if (p1[1] === p2[1]) {
-	      return true;
-	    } else {
-	      return false;
+	    if (toDate) {
+	      filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
 	    }
-	  }
-
-	  return false;
-	} // 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;
-	// };
-
-	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(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 (_mlyViewer) {
+	      _mlyViewer.setFilter(filter);
+	    }
 
-	  if (fnow > enow === fnow > -enow) {
-	    Q = enow;
-	    enow = e[++eindex];
-	  } else {
-	    Q = fnow;
-	    fnow = f[++findex];
-	  }
+	    _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();
 
-	  var hindex = 0;
+	    if (isHidden && _mlyViewer) {
+	      wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-	  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];
+	      _mlyViewer.resize();
 	    }
 
-	    Q = Qnew;
+	    return this;
+	  },
+	  // Hide the image viewer and resets map markers
+	  hideViewer: function hideViewer(context) {
+	    _mlyActiveImage = null;
 
-	    if (hh !== 0) {
-	      h[hindex++] = hh;
+	    if (!_mlyFallback && _mlyViewer) {
+	      _mlyViewer.getComponent('sequence').stop();
 	    }
 
-	    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];
+	    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 (imageId) {
+	        hash.photo = 'mapillary/' + imageId;
 	      } else {
-	        Qnew = Q + fnow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	        fnow = f[++findex];
+	        delete hash.photo;
 	      }
 
-	      Q = Qnew;
-
-	      if (hh !== 0) {
-	        h[hindex++] = hh;
-	      }
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
-	  }
-
-	  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;
+	  },
+	  // Highlight the detection in the viewer that is related to the clicked map feature
+	  highlightDetection: function highlightDetection(detection) {
+	    if (detection) {
+	      _mlyHighlightedDetection = detection.id;
 	    }
-	  }
-
-	  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(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(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(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;
-	}
-
-	/**
-	 * @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; // 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;
-	  return specialCases(e1, e2, p1);
-	}
-	/* 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; // 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;
-	  }
-
-	  return !e1.isSubject && e2.isSubject ? 1 : -1;
-	}
-	/* 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);
-	  }
-	  /* eslint-enable no-console */
-
-
-	  r.contourId = l.contourId = se.contourId; // 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;
-	  } // avoid a rounding error. The left event would be processed after the right event
-	  // if (compareEvents(se, r) > 0) {}
-
-
-	  se.otherEvent.otherEvent = l;
-	  se.otherEvent = r;
-	  queue.push(l);
-	  queue.push(r);
-	  return queue;
-	}
-
-	//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];
-	}
-	/**
-	 * 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];
-	}
-	/**
-	 * 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.
-	 */
 
+	    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
 
-	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 */
+	    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
 
-	  function toPoint(p, s, d) {
-	    return [p[0] + s * d[0], p[1] + s * d[1]];
-	  }
-	  /* eslint-enable arrow-body-style */
-	  // The rest is pretty much a straight port of the algorithm.
+	      };
+	    }
 
+	    _mlyViewer = new mapillary.Viewer(opts);
 
-	  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.
+	    _mlyViewer.on('image', imageChanged);
 
-	  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;
+	    _mlyViewer.on('bearing', bearingChanged);
 
-	      if (s < 0 || s > 1) {
-	        // not on line segment a
-	        return null;
-	      }
+	    if (_mlyViewerFilter) {
+	      _mlyViewer.setFilter(_mlyViewerFilter);
+	    } // Register viewer resize handler
 
-	      var t = crossProduct(e, va) / kross;
 
-	      if (t < 0 || t > 1) {
-	        // not on line segment b
-	        return null;
-	      }
+	    context.ui().photoviewer.on('resize.mapillary', function () {
+	      if (_mlyViewer) _mlyViewer.resize();
+	    }); // imageChanged: called after the viewer has changed images and is ready.
 
-	      if (s === 0 || s === 1) {
-	        // on an endpoint of line segment a
-	        return noEndpointTouch ? null : [toPoint(a1, s, va)];
-	      }
+	    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 (t === 0 || t === 1) {
-	        // on an endpoint of line segment b
-	        return noEndpointTouch ? null : [toPoint(b1, t, vb)];
+	      if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+	        that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
 	      }
 
-	      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);
-
+	      dispatch$4.call('imageChanged');
+	    } // bearingChanged: called when the bearing changes in the image viewer.
 
-	  kross = crossProduct(e, va);
-	  sqrKross = kross * kross;
 
-	  if (sqrKross > 0
-	  /* EPS * sqLenB * sqLenE */
-	  ) {
-	      // Lines are just parallel, not the same. No overlap.
-	      return null;
+	    function bearingChanged(e) {
+	      dispatch$4.call('bearingChanged', undefined, e);
 	    }
-
-	  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); // this is, essentially, the FindIntersection acting on floats from
-	  // Schneider & Eberly, just inlined into this function.
-
-	  if (smin <= 1 && smax >= 0) {
-	    // overlap on an end point
-	    if (smin === 1) {
-	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
+	  },
+	  // 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 (smax === 0) {
-	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
+	    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 (noEndpointTouch && smin === 0 && smax === 1) return null; // 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;
-	}
-
-	/**
-	 * @param  {SweepEvent} se1
-	 * @param  {SweepEvent} se2
-	 * @param  {Queue}      queue
-	 * @return {Number}
-	 */
+	    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] = [];
+	          }
 
-	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);
-	  var nintersections = inter ? inter.length : 0;
-	  if (nintersections === 0) return 0; // no intersection
-	  // 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;
-	  }
+	          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
 
-	  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;
-	  } // The line segments associated to se1 and se2 intersect
 
+	    function showDetections(detections) {
+	      var tagComponent = _mlyViewer.getComponent('tag');
 
-	  if (nintersections === 1) {
-	    // 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 the intersection point is not an endpoint of se2
+	      detections.forEach(function (data) {
+	        var tag = makeTag(data);
 
+	        if (tag) {
+	          tagComponent.add([tag]);
+	        }
+	      });
+	    } // Create a Mapillary JS tag object
 
-	    if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-	      divideSegment(se2, inter[0], queue);
-	    }
 
-	    return 1;
-	  } // The line segments associated to se1 and se2 overlap
+	    function makeTag(data) {
+	      var valueParts = data.value.split('--');
+	      if (!valueParts.length) return;
+	      var tag;
+	      var text;
+	      var color = 0xffffff;
 
+	      if (_mlyHighlightedDetection === data.id) {
+	        color = 0xffff00;
+	        text = valueParts[1];
 
-	  var events = [];
-	  var leftCoincide = false;
-	  var rightCoincide = false;
+	        if (text === 'flat' || text === 'discrete' || text === 'sign') {
+	          text = valueParts[2];
+	        }
 
-	  if (equals(se1.point, se2.point)) {
-	    leftCoincide = true; // linked
-	  } else if (compareEvents(se1, se2) === 1) {
-	    events.push(se2, se1);
-	  } else {
-	    events.push(se1, se2);
-	  }
+	        text = text.replace(/-/g, ' ');
+	        text = text.charAt(0).toUpperCase() + text.slice(1);
+	        _mlyHighlightedDetection = null;
+	      }
 
-	  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);
-	  }
+	      var decodedGeometry = window.atob(data.geometry);
+	      var uintArray = new Uint8Array(decodedGeometry.length);
 
-	  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;
+	      for (var i = 0; i < decodedGeometry.length; i++) {
+	        uintArray[i] = decodedGeometry.charCodeAt(i);
+	      }
 
-	    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 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;
+	  }
+	};
 
-	    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;
-	  } // one line segment includes the other one
+	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')
 
-	  divideSegment(events[0], events[1].point, queue);
-	  divideSegment(events[3].otherEvent, events[2].point, queue);
-	  return 3;
-	}
+	  this.severity = attrs.severity; // required - 'warning' or 'error'
 
-	/**
-	 * @param  {SweepEvent} le1
-	 * @param  {SweepEvent} le2
-	 * @return {Number}
-	 */
+	  this.message = attrs.message; // required - function returning localized string
 
-	function compareSegments(le1, le2) {
-	  if (le1 === le2) return 0; // Segments are not collinear
+	  this.reference = attrs.reference; // optional - function(selection) to render reference information
 
-	  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
+	  this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-	    if (le1.point[0] === le2.point[0]) return le1.point[1] < le2.point[1] ? -1 : 1; // has the line segment associated to e1 been inserted
-	    // into S after the line segment associated to e2 ?
+	  this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-	    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
+	  this.data = attrs.data; // optional - object containing extra data for the fixes
 
-	    return le1.isBelow(le2.point) ? -1 : 1;
-	  }
+	  this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-	  if (le1.isSubject === le2.isSubject) {
-	    // same polygon
-	    var p1 = le1.point,
-	        p2 = le2.point;
+	  this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-	    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;
-	      }
-	  } else {
-	    // Segments are collinear, but belong to separate polygons
-	    return le1.isSubject ? -1 : 1;
-	  }
+	  this.id = generateID.apply(this); // generated - see below
 
-	  return compareEvents(le1, le2) === 1 ? 1 : -1;
-	}
+	  this.key = generateKey.apply(this); // generated - see below (call after generating this.id)
 
-	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;
+	  this.autoFix = null; // generated - if autofix exists, will be set below
+	  // A unique, deterministic string hash.
+	  // Issues with identical id values are considered identical.
 
-	  while (eventQueue.length !== 0) {
-	    var event = eventQueue.pop();
-	    sortedEvents.push(event); // optimization by bboxes for intersection and difference goes here
+	  function generateID() {
+	    var parts = [this.type];
 
-	    if (operation === INTERSECTION && event.point[0] > rightbound || operation === DIFFERENCE && event.point[0] > sbbox[2]) {
-	      break;
+	    if (this.hash) {
+	      // subclasses can pass in their own differentiator
+	      parts.push(this.hash);
 	    }
 
-	    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);
-	        }
-	      }
-
-	      if (prev) {
-	        if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-	          var prevprev = prev;
-	          if (prevprev !== begin) prevprev = sweepLine.prev(prevprev);else prevprev = null;
-	          prevprevEvent = prevprev ? prevprev.key : null;
-	          computeFields(prevEvent, prevprevEvent, operation);
-	          computeFields(event, prevEvent, operation);
-	        }
-	      }
-	    } else {
-	      event = event.otherEvent;
-	      next = prev = sweepLine.find(event);
+	    if (this.subtype) {
+	      parts.push(this.subtype);
+	    } // include the entities this issue is for
+	    // (sort them so the id is deterministic)
 
-	      if (prev && next) {
-	        if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
-	        next = sweepLine.next(next);
-	        sweepLine.remove(event);
 
-	        if (next && prev) {
-	          possibleIntersection(prev.key, next.key, eventQueue);
-	        }
-	      }
+	    if (this.entityIds) {
+	      var entityKeys = this.entityIds.slice().sort();
+	      parts.push.apply(parts, entityKeys);
 	    }
-	  }
 
-	  return sortedEvents;
-	}
+	    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)
 
-	var Contour = /*#__PURE__*/function () {
-	  /**
-	   * Contour
-	   *
-	   * @class {Contour}
-	   */
-	  function Contour() {
-	    _classCallCheck(this, Contour);
 
-	    this.points = [];
-	    this.holeIds = [];
-	    this.holeOf = null;
-	    this.depth = null;
+	  function generateKey() {
+	    return this.id + ':' + Date.now().toString(); // include time of creation
 	  }
 
-	  _createClass(Contour, [{
-	    key: "isExterior",
-	    value: function isExterior() {
-	      return this.holeOf == null;
+	  this.extent = function (resolver) {
+	    if (this.loc) {
+	      return geoExtent(this.loc);
 	    }
-	  }]);
 
-	  return Contour;
-	}();
-
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<SweepEvent>}
-	 */
+	    if (this.entityIds && this.entityIds.length) {
+	      return this.entityIds.reduce(function (extent, entityId) {
+	        return extent.extend(resolver.entity(entityId).extent(resolver));
+	      }, geoExtent());
+	    }
 
-	function orderEvents(sortedEvents) {
-	  var event, i, len, tmp;
-	  var resultEvents = [];
+	    return null;
+	  };
 
-	  for (i = 0, len = sortedEvents.length; i < len; i++) {
-	    event = sortedEvents[i];
+	  this.fixes = function (context) {
+	    var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+	    var issue = this;
 
-	    if (event.left && event.inResult || !event.left && event.otherEvent.inResult) {
-	      resultEvents.push(event);
+	    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);
+	        }
+	      }));
 	    }
-	  } // Due to overlapping edges the resultEvents array can be not wholly sorted
-
 
-	  var sorted = false;
+	    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
 
-	  while (!sorted) {
-	    sorted = true;
+	      fix.issue = issue;
 
-	    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;
+	      if (fix.autoArgs) {
+	        issue.autoFix = fix;
 	      }
-	    }
-	  }
-
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    event.otherPos = i;
-	  } // imagine, the right event is found in the beginning of the queue,
-	  // when his left counterpart is not marked yet
-
+	    });
+	    return fixes;
+	  };
+	}
+	function validationIssueFix(attrs) {
+	  this.title = attrs.title; // Required
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
+	  this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-	    if (!event.left) {
-	      tmp = event.otherPos;
-	      event.otherPos = event.otherEvent.otherPos;
-	      event.otherEvent.otherPos = tmp;
-	    }
-	  }
+	  this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
 
-	  return resultEvents;
-	}
-	/**
-	 * @param  {Number} pos
-	 * @param  {Array.<SweepEvent>} resultEvents
-	 * @param  {Object>}    processed
-	 * @return {Number}
-	 */
+	  this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
+	  this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
-	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;
+	  this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
-	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-	    if (!processed[newPos]) {
-	      return newPos;
-	    } else {
-	      newPos++;
-	    }
+	  this.issue = null; // Generated link - added by validationIssue
+	}
 
-	    p1 = resultEvents[newPos].point;
-	  }
+	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];
 
-	  newPos = pos - 1;
+	      var expression = _positiveRegex[tagKey].join('|');
 
-	  while (processed[newPos] && newPos > origPos) {
-	    newPos--;
-	  }
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return regex.test(tags[tagKey]);
+	      };
+	    },
+	    negativeRegex: function negativeRegex(_negativeRegex) {
+	      var tagKey = Object.keys(_negativeRegex)[0];
 
-	  return newPos;
-	}
+	      var expression = _negativeRegex[tagKey].join('|');
 
-	function initializeContourFromContext(event, contours, contourId) {
-	  var contour = new Contour();
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return !regex.test(tags[tagKey]);
+	      };
+	    }
+	  };
+	};
 
-	  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 buildLineKeys = function buildLineKeys() {
+	  return {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
+	    }
+	  };
+	};
 
-	    var lowerContourId = prevInResult.outputContourId;
-	    var lowerResultTransition = prevInResult.resultTransition;
+	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]));
+	      }
 
-	    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];
+	      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, '');
+	      });
+	    };
 
-	      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;
-	    }
-	  } else {
-	    // There is no lower/previous contour => this contour is an exterior contour of depth 0.
-	    contour.holeOf = null;
-	    contour.depth = 0;
-	  }
+	    var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+	      var values;
+	      var isRegex = /regex/gi.test(key);
+	      var isEqual = /equals/gi.test(key);
 
-	  return contour;
-	}
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<*>} polygons
-	 */
+	      if (isRegex || isEqual) {
+	        Object.keys(selector[key]).forEach(function (selectorKey) {
+	          values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
+	          if (expectedTags.hasOwnProperty(selectorKey)) {
+	            values = values.concat(expectedTags[selectorKey]);
+	          }
 
-	function connectEdges(sortedEvents) {
-	  var i, len;
-	  var resultEvents = orderEvents(sortedEvents); // "false"-filled array
+	          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]];
 
-	  var processed = {};
-	  var contours = [];
+	        if (expectedTags.hasOwnProperty(tagKey)) {
+	          values = values.concat(expectedTags[tagKey]);
+	        }
 
-	  var _loop = function _loop() {
-	    if (processed[i]) {
-	      return "continue";
-	    }
+	        expectedTags[tagKey] = values;
+	      }
 
-	    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
+	      return expectedTags;
+	    }, {});
+	    return tagMap;
+	  },
+	  // inspired by osmWay#isArea()
+	  inferGeometry: function inferGeometry(tagMap) {
+	    var _lineKeys = this._lineKeys;
+	    var _areaKeys = this._areaKeys;
 
-	    var markAsProcessed = function markAsProcessed(pos) {
-	      processed[pos] = true;
-	      resultEvents[pos].outputContourId = contourId;
+	    var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
 	    };
 
-	    var pos = i;
-	    var origPos = i;
-	    var initial = resultEvents[i].point;
-	    contour.points.push(initial);
-	    /* eslint no-constant-condition: "off" */
+	    var keyValueImpliesLine = function keyValueImpliesLine(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+	    };
 
-	    while (true) {
-	      markAsProcessed(pos);
-	      pos = resultEvents[pos].otherPos;
-	      markAsProcessed(pos);
-	      contour.points.push(resultEvents[pos].point);
-	      pos = nextPos(pos, resultEvents, processed, origPos);
+	    if (tagMap.hasOwnProperty('area')) {
+	      if (tagMap.area.indexOf('yes') > -1) {
+	        return 'area';
+	      }
 
-	      if (pos == origPos) {
-	        break;
+	      if (tagMap.area.indexOf('no') > -1) {
+	        return 'line';
 	      }
 	    }
 
-	    contours.push(contour);
-	  };
-
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    var _ret = _loop();
-
-	    if (_ret === "continue") continue;
-	  }
-
-	  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;
+	    for (var key in tagMap) {
+	      if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+	        return 'area';
+	      }
 
-	  if (this.length > 0) {
-	    for (var i = (this.length >> 1) - 1; i >= 0; i--) {
-	      this._down(i);
+	      if (key in _lineKeys && keyValueImpliesLine(key)) {
+	        return 'area';
+	      }
 	    }
-	  }
-	}
-
-	function defaultCompare$1(a, b) {
-	  return a < b ? -1 : a > b ? 1 : 0;
-	}
-
-	TinyQueue.prototype = {
-	  push: function push(item) {
-	    this.data.push(item);
-	    this.length++;
 
-	    this._up(this.length - 1);
+	    return 'line';
 	  },
-	  pop: function pop() {
-	    if (this.length === 0) return undefined;
-	    var top = this.data[0];
-	    this.length--;
-
-	    if (this.length > 0) {
-	      this.data[0] = this.data[this.length];
-
-	      this._down(0);
-	    }
+	  // 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]
+	          }));
+	        }
+	      }
+	    };
 
-	    this.data.pop();
-	    return top;
+	    this._validationRules.push(rule);
 	  },
-	  peek: function peek() {
-	    return this.data[0];
+	  clearRules: function clearRules() {
+	    this._validationRules = [];
 	  },
-	  _up: function _up(pos) {
-	    var data = this.data;
-	    var compare = this.compare;
-	    var item = data[pos];
-
-	    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;
+	  // returns validationRules...
+	  validationRules: function validationRules() {
+	    return this._validationRules;
 	  },
-	  _down: function _down(pos) {
-	    var data = this.data;
-	    var compare = this.compare;
-	    var halfLength = this.length >> 1;
-	    var item = data[pos];
-
-	    while (pos < halfLength) {
-	      var left = (pos << 1) + 1;
-	      var right = left + 1;
-	      var best = data[left];
-
-	      if (right < this.length && compare(data[right], best) < 0) {
-	        left = right;
-	        best = data[right];
-	      }
-
-	      if (compare(best, item) >= 0) break;
-	      data[pos] = best;
-	      pos = left;
-	    }
-
-	    data[pos] = item;
+	  // returns ruleChecks
+	  ruleChecks: function ruleChecks() {
+	    return this._ruleChecks;
 	  }
 	};
-	tinyqueue["default"] = _default$1;
-
-	var max$5 = Math.max;
-	var min$a = 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;
-
-	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
-	      continue; // skip collapsed edges, or it breaks
-	    }
+	var apibase$2 = 'https://nominatim.openstreetmap.org/';
+	var _inflight$2 = {};
 
-	    e1.contourId = e2.contourId = depth;
+	var _nominatimCache;
 
-	    if (!isExteriorRing) {
-	      e1.isExteriorRing = false;
-	      e2.isExteriorRing = false;
-	    }
+	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 (compareEvents(e1, e2) > 0) {
-	      e2.left = true;
-	    } else {
-	      e1.left = true;
+	    if (cached.length > 0) {
+	      if (callback) callback(null, cached[0].data);
+	      return;
 	    }
 
-	    var x = s1[0],
-	        y = s1[1];
-	    bbox[0] = min$a(bbox[0], x);
-	    bbox[1] = min$a(bbox[1], y);
-	    bbox[2] = max$5(bbox[2], x);
-	    bbox[3] = max$5(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);
-	  }
-	}
-
-	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);
-	    }
-	  }
+	    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];
 
-	  for (i = 0, ii = clipping.length; i < ii; i++) {
-	    polygonSet = clipping[i];
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	    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);
-	    }
-	  }
+	      var extent = geoExtent(loc).padByMeters(200);
 
-	  return eventQueue;
-	}
+	      _nominatimCache.insert(Object.assign(extent.bbox(), {
+	        data: result
+	      }));
 
-	var EMPTY = [];
+	      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];
 
-	function trivialOperation(subject, clipping, operation) {
-	  var result = null;
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	  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;
-	    }
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight$2[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
 	  }
+	};
 
-	  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);
-	    }
-	  }
+	// for punction see https://stackoverflow.com/a/21224179
 
-	  return result;
+	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 _boolean(subject, clipping, operation) {
-	  if (typeof subject[0][0][0] === 'number') {
-	    subject = [subject];
-	  }
-
-	  if (typeof clipping[0][0][0] === 'number') {
-	    clipping = [clipping];
-	  }
+	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/laboratory","healthcare/physiotherapist","healthcare/sample_collection","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent","shop/perfumery"],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/boutique","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"],parcel_locker:["amenity/parcel_locker","amenity/vending_machine"],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"],storage:["shop/storage_units","shop/storage_rental"],substation:["power/station","power/substation","power/sub_station"],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"],weight_loss:["amenity/clinic","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 trivial = trivialOperation(subject, clipping, operation);
+	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$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(fixme|n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^private$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
+	var genericWordsJSON = {
+	genericWords: genericWords
+	};
 
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  }
+	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
+	};
 
-	  var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-	  var cbbox = [Infinity, Infinity, -Infinity, -Infinity]; // console.time('fill queue');
+	var matchGroups = matchGroupsJSON.matchGroups;
+	var trees = treesJSON.trees;
+	var Matcher = /*#__PURE__*/function () {
+	  //
+	  // `constructor`
+	  // initialize the genericWords regexes
+	  function Matcher() {
+	    var _this = this;
 
-	  var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation); //console.timeEnd('fill queue');
+	    _classCallCheck$1(this, Matcher);
 
-	  trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
+	    // 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),
+
+	    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]',
+	    //   …
+	    // }
 
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  } // console.time('subdivide edges');
+	    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 {…},
+	    //   …
+	    // }
 
+	    this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.
 
-	  var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation); //console.timeEnd('subdivide edges');
-	  // console.time('connect vertices');
+	    this.locationIndex = undefined; // Array of match conflict pairs (currently unused)
 
-	  var contours = connectEdges(sortedEvents); //console.timeEnd('connect vertices');
-	  // Convert contours to polygons
+	    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: [ {}, {}, … ] },
+	  //    …
+	  // }
+	  //
 
-	  var polygons = [];
 
-	  for (var i = 0; i < contours.length; i++) {
-	    var contour = contours[i];
+	  _createClass$1(Matcher, [{
+	    key: "buildMatchIndex",
+	    value: function buildMatchIndex(data) {
+	      var that = this;
+	      if (that.matchIndex) return; // it was built already
+
+	      that.matchIndex = new Map();
+	      var seenTree = new Map(); // warn if the same [k, v, nsimple] appears in multiple trees - #5625
+
+	      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
 
-	    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);
-	      }
+	        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
 
-	      polygons.push(rings);
-	    }
-	  }
+	        var items = category.items;
+	        if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
+	        //  e.g. `name`, `name:ru`
 
-	  return polygons;
-	}
+	        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..
 
-	function union(subject, clipping) {
-	  return _boolean(subject, clipping, UNION);
-	}
+	        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 read$6 = function read(buffer, offset, isLE, mLen, nBytes) {
-	  var e, m;
-	  var eLen = nBytes * 8 - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var nBits = -7;
-	  var i = isLE ? nBytes - 1 : 0;
-	  var d = isLE ? -1 : 1;
-	  var s = buffer[offset + i];
-	  i += d;
-	  e = s & (1 << -nBits) - 1;
-	  s >>= -nBits;
-	  nBits += eLen;
+	        var notName = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+	        var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)
 
-	  m = e & (1 << -nBits) - 1;
-	  e >>= -nBits;
-	  nBits += mLen;
+	        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`)
 
-	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+	        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
 
-	  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;
-	  }
+	            matchGroupKV.add(otherkv);
+	            var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`
 
-	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
-	};
+	            genericKV.add("".concat(otherk, "/yes"));
+	          });
+	        }); // For each item, insert all [key, value, name] combinations into the match index
 
-	var write$6 = function write(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);
+	        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`)
 
-	  if (isNaN(value) || value === Infinity) {
-	    m = isNaN(value) ? 1 : 0;
-	    e = eMax;
-	  } else {
-	    e = Math.floor(Math.log(value) / Math.LN2);
+	          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..
 
-	    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);
-	    }
+	          var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);
 
-	    if (value * c >= 2) {
-	      e++;
-	      c /= 2;
-	    }
+	          if (!skipGenericKV) {
+	            kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+	          } // Index all the namelike tag values
 
-	    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;
-	    }
-	  }
 
-	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+	          Object.keys(item.tags).forEach(function (osmkey) {
+	            if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip
 
-	  e = e << mLen | m;
-	  eLen += mLen;
+	            var osmvalue = item.tags[osmkey];
+	            if (!osmvalue || excludeRegexes.some(function (regex) {
+	              return regex.test(osmvalue);
+	            })) return; // osmvalue missing or excluded
 
-	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+	            if (primaryName.test(osmkey)) {
+	              kvTags.forEach(function (kv) {
+	                return insertName('primary', t, kv, simplify$1(osmvalue), item.id);
+	              });
+	            } else if (alternateName.test(osmkey)) {
+	              kvTags.forEach(function (kv) {
+	                return insertName('alternate', t, kv, simplify$1(osmvalue), item.id);
+	              });
+	            }
+	          }); // 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', t, 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`)
 
-	  buffer[offset + i - d] |= s * 128;
-	};
+	          if (keepMatchNames.size) {
+	            item.matchNames = Array.from(keepMatchNames);
+	          } else {
+	            delete item.matchNames;
+	          }
+	        }); // each item
+	      }); // each tkv
+	      // Insert this item into the matchIndex
 
-	var ieee754$1 = {
-	  read: read$6,
-	  write: write$6
-	};
+	      function insertName(which, t, kv, nsimple, itemID) {
+	        if (!nsimple) {
+	          that.warnings.push("Warning: skipping empty ".concat(which, " name for item ").concat(t, "/").concat(kv, ": ").concat(itemID));
+	          return;
+	        }
 
-	var pbf = Pbf;
+	        var branch = that.matchIndex.get(kv);
 
-	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;
-	}
+	        if (!branch) {
+	          branch = {
+	            primary: new Map(),
+	            alternate: new Map(),
+	            excludeGeneric: new Map(),
+	            excludeNamed: new Map()
+	          };
+	          that.matchIndex.set(kv, branch);
+	        }
 
-	Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
+	        var leaf = branch[which].get(nsimple);
 
-	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
+	        if (!leaf) {
+	          leaf = new Set();
+	          branch[which].set(nsimple, leaf);
+	        }
 
-	Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
+	        leaf.add(itemID); // insert
+	        // check for duplicates - #5625
 
-	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+	        if (!/yes$/.test(kv)) {
+	          // ignore genericKV like amenity/yes, building/yes, etc
+	          var kvnsimple = "".concat(kv, "/").concat(nsimple);
+	          var existing = seenTree.get(kvnsimple);
 
-	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)
+	          if (existing && existing !== t) {
+	            var items = Array.from(leaf);
+	            that.warnings.push("Duplicate cache key \"".concat(kvnsimple, "\" in trees \"").concat(t, "\" and \"").concat(existing, "\", check items: ").concat(items));
+	            return;
+	          }
 
-	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;
+	          seenTree.set(kvnsimple, t);
+	        }
+	      } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-	    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);
-	    }
 
-	    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$1.read(this.buf, this.pos, true, 23, 4);
-	    this.pos += 4;
-	    return val;
-	  },
-	  readDouble: function readDouble() {
-	    var val = ieee754$1.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;
+	      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: [ {}, {}, … ] },
+	    //    …
+	    // }
+	    //
 
-	    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
+	  }, {
+	    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?
 
-	    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 || [];
+	          var resolved;
 
-	    while (this.pos < end) {
-	      arr.push(this.readVarint(isSigned));
-	    }
+	          try {
+	            resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+	          } catch (err) {
+	            console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
+	          }
 
-	    return arr;
-	  },
-	  readPackedSVarint: function readPackedSVarint(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	          if (!resolved || !resolved.id) return;
+	          that.itemLocation.set(item.id, resolved.id); // link it to the item
 
-	    while (this.pos < end) {
-	      arr.push(this.readSVarint());
-	    }
+	          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..
 
-	    return arr;
-	  },
-	  readPackedBoolean: function readPackedBoolean(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	          var feature = _cloneDeep(resolved.feature);
 
-	    while (this.pos < end) {
-	      arr.push(this.readBoolean());
-	    }
+	          feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
-	    return arr;
-	  },
-	  readPackedFloat: function readPackedFloat(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	          feature.properties.id = resolved.id;
 
-	    while (this.pos < end) {
-	      arr.push(this.readFloat());
-	    }
+	          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;
+	          }
 
-	    return arr;
-	  },
-	  readPackedDouble: function readPackedDouble(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	          that.locationSets.set(resolved.id, feature);
+	        });
+	      });
+	      that.locationIndex = whichPolygon_1({
+	        type: 'FeatureCollection',
+	        features: _toConsumableArray(that.locationSets.values())
+	      });
 
-	    while (this.pos < end) {
-	      arr.push(this.readDouble());
-	    }
+	      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`
+	    //
+	    //
 
-	    return arr;
-	  },
-	  readPackedFixed32: function readPackedFixed32(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	  }, {
+	    key: "match",
+	    value: function match(k, v, n, loc) {
+	      var that = this;
 
-	    while (this.pos < end) {
-	      arr.push(this.readFixed32());
-	    }
+	      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.
 
-	    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());
-	    }
+	      var matchLocations;
 
-	    return arr;
-	  },
-	  readPackedFixed64: function readPackedFixed64(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	      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);
+	      }
 
-	    while (this.pos < end) {
-	      arr.push(this.readFixed64());
-	    }
+	      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;
 
-	    return arr;
-	  },
-	  readPackedSFixed64: function readPackedSFixed64(arr) {
-	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
-	    var end = readPackedEnd(this);
-	    arr = arr || [];
+	          for (var i = 0; i < matchGroup.length; i++) {
+	            var otherkv = matchGroup[i];
+	            if (otherkv === kv) continue; // skip self
 
-	    while (this.pos < end) {
-	      arr.push(this.readSFixed64());
-	    }
+	            didMatch = tryMatch(which, otherkv);
+	            if (didMatch) return;
+	          }
+	        } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns
 
-	    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;
 
-	    while (length < this.pos + min) {
-	      length *= 2;
-	    }
+	        if (which === 'exclude') {
+	          var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	    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;
+	          if (regex) {
+	            results.push({
+	              match: 'excludeGeneric',
+	              pattern: String(regex)
+	            }); // note no `branch`, no `kv`
 
-	    if (val > 0xfffffff || val < 0) {
-	      writeBigVarint(val, this);
-	      return;
-	    }
+	            return;
+	          }
+	        }
+	      }
 
-	    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
+	      function tryMatch(which, kv) {
+	        var branch = that.matchIndex.get(kv);
+	        if (!branch) return;
 
-	    var startPos = this.pos; // write the string directly to the buffer and see how much was written
+	        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);
+	          });
 
-	    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
+	          if (regex) {
+	            results.push({
+	              match: 'excludeNamed',
+	              pattern: String(regex),
+	              kv: kv
+	            });
+	            return;
+	          }
 
-	    this.pos = startPos - 1;
-	    this.writeVarint(len);
-	    this.pos += len;
-	  },
-	  writeFloat: function writeFloat(val) {
-	    this.realloc(4);
-	    ieee754$1.write(this.buf, val, this.pos, true, 23, 4);
-	    this.pos += 4;
-	  },
-	  writeDouble: function writeDouble(val) {
-	    this.realloc(8);
-	    ieee754$1.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);
+	          regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	    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
+	          if (regex) {
+	            results.push({
+	              match: 'excludeGeneric',
+	              pattern: String(regex),
+	              kv: kv
+	            });
+	            return;
+	          }
 
-	    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
+	          return;
+	        }
 
-	    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));
-	  }
-	};
+	        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)
 
-	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');
-	}
+	        var hits = Array.from(leaf).map(function (itemID) {
+	          var area = Infinity;
 
-	function readPackedEnd(pbf) {
-	  return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
-	}
+	          if (that.itemLocation && that.locationSets) {
+	            var location = that.locationSets.get(that.itemLocation.get(itemID));
+	            area = location && location.properties.area || Infinity;
+	          }
 
-	function toNum(low, high, isSigned) {
-	  if (isSigned) {
-	    return high * 0x100000000 + (low >>> 0);
-	  }
+	          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`..
 
-	  return (high >>> 0) * 0x100000000 + (low >>> 0);
-	}
+	        if (matchLocations) {
+	          hits = hits.filter(isValidLocation);
+	          sortFn = byAreaAscending;
+	        }
 
-	function writeBigVarint(val, pbf) {
-	  var low, high;
+	        if (!hits.length) return; // push results
 
-	  if (val >= 0) {
-	    low = val % 0x100000000 | 0;
-	    high = val / 0x100000000 | 0;
-	  } else {
-	    low = ~(-val % 0x100000000);
-	    high = ~(-val / 0x100000000);
+	        hits.sort(sortFn).forEach(function (hit) {
+	          if (seen.has(hit.itemID)) return;
+	          seen.add(hit.itemID);
+	          results.push(hit);
+	        });
+	        return true;
 
-	    if (low ^ 0xffffffff) {
-	      low = low + 1 | 0;
-	    } else {
-	      low = 0;
-	      high = high + 1 | 0;
-	    }
-	  }
+	        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.
 
-	  if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-	    throw new Error('Given varint doesn\'t fit into 10 bytes');
-	  }
 
-	  pbf.realloc(10);
-	  writeBigVarintLow(low, high, pbf);
-	  writeBigVarintHigh(high, pbf);
-	}
+	        function byAreaAscending(hitA, hitB) {
+	          return hitA.area - hitB.area;
+	        } // Sort larger (more worldwide) locations first.
 
-	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 byAreaDescending(hitA, hitB) {
+	          return hitB.area - hitA.area;
+	        }
+	      }
+	    } //
+	    // `getWarnings()`
+	    // Return any warnings discovered when buiding the index.
+	    // (currently this does nothing)
+	    //
 
-	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
+	  }, {
+	    key: "getWarnings",
+	    value: function getWarnings() {
+	      return this.warnings;
+	    }
+	  }]);
 
-	  pbf.realloc(extraLen);
+	  return Matcher;
+	}();
 
-	  for (var i = pbf.pos - 1; i >= startPos; i--) {
-	    pbf.buf[i + extraLen] = pbf.buf[i];
-	  }
-	}
+	/*
+	    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 _writePackedVarint(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeVarint(arr[i]);
-	  }
-	}
+	function coreDifference(base, head) {
+	  var _changes = {};
+	  var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
-	function _writePackedSVarint(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeSVarint(arr[i]);
-	  }
-	}
+	  var _diff = {};
 
-	function _writePackedFloat(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeFloat(arr[i]);
-	  }
-	}
+	  function checkEntityID(id) {
+	    var h = head.entities[id];
+	    var b = base.entities[id];
+	    if (h === b) return;
+	    if (_changes[id]) return;
 
-	function _writePackedDouble(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeDouble(arr[i]);
-	  }
-	}
+	    if (!h && b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.deletion = true;
+	      return;
+	    }
 
-	function _writePackedBoolean(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeBoolean(arr[i]);
-	  }
-	}
+	    if (h && !b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.addition = true;
+	      return;
+	    }
 
-	function _writePackedFixed(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeFixed32(arr[i]);
-	  }
-	}
+	    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;
+	      }
 
-	function _writePackedSFixed(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeSFixed32(arr[i]);
-	  }
-	}
+	      if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	function _writePackedFixed2(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeFixed64(arr[i]);
-	  }
-	}
+	      if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	function _writePackedSFixed2(arr, pbf) {
-	  for (var i = 0; i < arr.length; i++) {
-	    pbf.writeSFixed64(arr[i]);
+	      if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.properties = true;
+	      }
+	    }
 	  }
-	} // Buffer code below from https://github.com/feross/buffer, MIT-licensed
-
-
-	function readUInt32(buf, pos) {
-	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
-	}
-
-	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 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)));
 
-	function readUtf8(buf, pos, end) {
-	  var str = '';
-	  var i = pos;
+	    for (var i = 0; i < ids.length; i++) {
+	      checkEntityID(ids[i]);
+	    }
+	  }
 
-	  while (i < end) {
-	    var b0 = buf[i];
-	    var c = null; // codepoint
+	  load();
 
-	    var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
-	    if (i + bytesPerSequence > end) break;
-	    var b1, b2, b3;
+	  _diff.length = function length() {
+	    return Object.keys(_changes).length;
+	  };
 
-	    if (bytesPerSequence === 1) {
-	      if (b0 < 0x80) {
-	        c = b0;
-	      }
-	    } else if (bytesPerSequence === 2) {
-	      b1 = buf[i + 1];
+	  _diff.changes = function changes() {
+	    return _changes;
+	  };
 
-	      if ((b1 & 0xC0) === 0x80) {
-	        c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
+	  _diff.didChange = _didChange; // pass true to include affected relation members
 
-	        if (c <= 0x7F) {
-	          c = null;
-	        }
+	  _diff.extantIDs = function extantIDs(includeRelMembers) {
+	    var result = new Set();
+	    Object.keys(_changes).forEach(function (id) {
+	      if (_changes[id].head) {
+	        result.add(id);
 	      }
-	    } 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;
+	      var h = _changes[id].head;
+	      var b = _changes[id].base;
+	      var entity = h || b;
 
-	        if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
-	          c = null;
-	        }
+	      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);
+	          }
+	        });
 	      }
-	    } 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;
+	    });
+	    return Array.from(result);
+	  };
 
-	        if (c <= 0xFFFF || c >= 0x110000) {
-	          c = null;
-	        }
+	  _diff.modified = function modified() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && change.head) {
+	        result.push(change.head);
 	      }
-	    }
+	    });
+	    return result;
+	  };
 
-	    if (c === null) {
-	      c = 0xFFFD;
-	      bytesPerSequence = 1;
-	    } else if (c > 0xFFFF) {
-	      c -= 0x10000;
-	      str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-	      c = 0xDC00 | c & 0x3FF;
-	    }
+	  _diff.created = function created() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (!change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	    str += String.fromCharCode(c);
-	    i += bytesPerSequence;
-	  }
+	  _diff.deleted = function deleted() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && !change.head) {
+	        result.push(change.base);
+	      }
+	    });
+	    return result;
+	  };
 
-	  return str;
-	}
+	  _diff.summary = function summary() {
+	    var relevant = {};
+	    var keys = Object.keys(_changes);
 
-	function readUtf8TextDecoder(buf, pos, end) {
-	  return utf8TextDecoder.decode(buf.subarray(pos, end));
-	}
+	    for (var i = 0; i < keys.length; i++) {
+	      var change = _changes[keys[i]];
 
-	function writeUtf8(buf, str, pos) {
-	  for (var i = 0, c, lead; i < str.length; i++) {
-	    c = str.charCodeAt(i); // code point
+	      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);
 
-	    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;
+	        if (moved) {
+	          addParents(change.head);
 	        }
 
-	        continue;
+	        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');
 	      }
-	    } else if (lead) {
-	      buf[pos++] = 0xEF;
-	      buf[pos++] = 0xBF;
-	      buf[pos++] = 0xBD;
-	      lead = null;
 	    }
 
-	    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;
-	      }
+	    return Object.values(relevant);
 
-	      buf[pos++] = c & 0x3F | 0x80;
+	    function addEntity(entity, graph, changeType) {
+	      relevant[entity.id] = {
+	        entity: entity,
+	        graph: graph,
+	        changeType: changeType
+	      };
 	    }
-	  }
 
-	  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 addParents(entity) {
+	      var parents = head.parentWays(entity);
 
-	function Point(x, y) {
-	  this.x = x;
-	  this.y = y;
-	}
+	      for (var j = parents.length - 1; j >= 0; j--) {
+	        var parent = parents[j];
 
-	Point.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(this.x, this.y);
-	  },
+	        if (!(parent.id in relevant)) {
+	          addEntity(parent, head, 'modified');
+	        }
+	      }
+	    }
+	  }; // returns complete set of entities that require a redraw
+	  //  (optionally within given `extent`)
 
-	  /**
-	   * 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);
-	  },
 
-	  /**
-	   * 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);
-	  },
+	  _diff.complete = function complete(extent) {
+	    var result = {};
+	    var id, change;
 
-	  /**
-	   * 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);
-	  },
+	    for (id in _changes) {
+	      change = _changes[id];
+	      var h = change.head;
+	      var b = change.base;
+	      var entity = h || b;
+	      var i;
 
-	  /**
-	   * 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);
-	  },
+	      if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+	        continue;
+	      }
 
-	  /**
-	   * 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);
-	  },
+	      result[id] = h;
 
-	  /**
-	   * 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);
-	  },
+	      if (entity.type === 'way') {
+	        var nh = h ? h.nodes : [];
+	        var nb = b ? b.nodes : [];
+	        var diff;
+	        diff = utilArrayDifference(nh, nb);
 
-	  /**
-	   * 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);
-	  },
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
 
-	  /**
-	   * 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);
-	  },
+	        diff = utilArrayDifference(nb, nh);
 
-	  /**
-	   * 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);
-	  },
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
+	      }
 
-	  /**
-	   * 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();
-	  },
+	      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);
 
-	  /**
-	   * 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();
-	  },
+	        for (i = 0; i < ids.length; i++) {
+	          var member = head.hasEntity(ids[i]);
+	          if (!member) continue; // not downloaded
 
-	  /**
-	   * 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();
-	  },
+	          if (extent && !member.intersects(extent, head)) continue; // not visible
 
-	  /**
-	   * 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);
-	  },
+	          result[ids[i]] = member;
+	        }
+	      }
 
-	  /**
-	   * 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;
-	  },
+	      addParents(head.parentWays(entity), result);
+	      addParents(head.parentRelations(entity), result);
+	    }
 
-	  /**
-	   * 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));
-	  },
+	    return result;
 
-	  /**
-	   * 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;
-	  },
+	    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);
+	      }
+	    }
+	  };
 
-	  /**
-	   * 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);
-	  },
+	  return _diff;
+	}
 
-	  /**
-	   * 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);
-	  },
+	function coreTree(head) {
+	  // tree for entities
+	  var _rtree = new RBush();
 
-	  /**
-	   * 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);
-	  },
+	  var _bboxes = {}; // maintain a separate tree for granular way segments
 
-	  /*
-	   * 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());
+	  var _segmentsRTree = new RBush();
 
-	    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);
-	 */
+	  var _segmentsBBoxes = {};
+	  var _segmentsByWayId = {};
+	  var tree = {};
 
-	Point.convert = function (a) {
-	  if (a instanceof Point) {
-	    return a;
+	  function entityBBox(entity) {
+	    var bbox = entity.extent(head).bbox();
+	    bbox.id = entity.id;
+	    _bboxes[entity.id] = bbox;
+	    return bbox;
 	  }
 
-	  if (Array.isArray(a)) {
-	    return new Point(a[0], a[1]);
+	  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;
 	  }
 
-	  return a;
-	};
+	  function removeEntity(entity) {
+	    _rtree.remove(_bboxes[entity.id]);
 
-	var vectortilefeature = VectorTileFeature;
+	    delete _bboxes[entity.id];
 
-	function VectorTileFeature(pbf, end, extent, keys, values) {
-	  // Public
-	  this.properties = {};
-	  this.extent = extent;
-	  this.type = 0; // Private
+	    if (_segmentsByWayId[entity.id]) {
+	      _segmentsByWayId[entity.id].forEach(function (segment) {
+	        _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
-	  this._pbf = pbf;
-	  this._geometry = -1;
-	  this._keys = keys;
-	  this._values = values;
-	  pbf.readFields(readFeature, this, end);
-	}
+	        delete _segmentsBBoxes[segment.id];
+	      });
 
-	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;
-	}
+	      delete _segmentsByWayId[entity.id];
+	    }
+	  }
 
-	function readTag(pbf, feature) {
-	  var end = pbf.readVarint() + pbf.pos;
+	  function loadEntities(entities) {
+	    _rtree.load(entities.map(entityBBox));
 
-	  while (pbf.pos < end) {
-	    var key = feature._keys[pbf.readVarint()],
-	        value = feature._values[pbf.readVarint()];
+	    var segments = [];
+	    entities.forEach(function (entity) {
+	      if (entity.segments) {
+	        var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-	    feature.properties[key] = value;
+	        _segmentsByWayId[entity.id] = entitySegments;
+	        segments = segments.concat(entitySegments);
+	      }
+	    });
+	    if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
 	  }
-	}
 
-	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+	  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;
 
-	VectorTileFeature.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;
+	      if (_bboxes[relation.id]) {
+	        removeEntity(relation);
+	        insertions[relation.id] = relation;
+	      }
 
-	  while (pbf.pos < end) {
-	    if (length <= 0) {
-	      var cmdLen = pbf.readVarint();
-	      cmd = cmdLen & 0x7;
-	      length = cmdLen >> 3;
-	    }
+	      updateParents(relation, insertions, memo);
+	    });
+	  }
 
-	    length--;
+	  tree.rebase = function (entities, force) {
+	    var insertions = {};
 
-	    if (cmd === 1 || cmd === 2) {
-	      x += pbf.readSVarint();
-	      y += pbf.readSVarint();
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible) continue;
 
-	      if (cmd === 1) {
-	        // moveTo
-	        if (line) lines.push(line);
-	        line = [];
+	      if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+	        if (!force) {
+	          continue;
+	        } else if (_bboxes[entity.id]) {
+	          removeEntity(entity);
+	        }
 	      }
 
-	      line.push(new pointGeometry(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);
+	      insertions[entity.id] = entity;
+	      updateParents(entity, insertions, {});
 	    }
-	  }
 
-	  if (line) lines.push(line);
-	  return lines;
-	};
+	    loadEntities(Object.values(insertions));
+	    return tree;
+	  };
 
-	VectorTileFeature.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;
+	  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 = {};
 
-	  while (pbf.pos < end) {
-	    if (length <= 0) {
-	      var cmdLen = pbf.readVarint();
-	      cmd = cmdLen & 0x7;
-	      length = cmdLen >> 3;
+	    if (changed.deletion) {
+	      diff.deleted().forEach(function (entity) {
+	        removeEntity(entity);
+	      });
 	    }
 
-	    length--;
+	    if (changed.geometry) {
+	      diff.modified().forEach(function (entity) {
+	        removeEntity(entity);
+	        insertions[entity.id] = entity;
+	        updateParents(entity, insertions, {});
+	      });
+	    }
 
-	    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);
+	    if (changed.addition) {
+	      diff.created().forEach(function (entity) {
+	        insertions[entity.id] = entity;
+	      });
 	    }
-	  }
 
-	  return [x1, y1, x2, y2];
-	};
+	    loadEntities(Object.values(insertions));
+	  } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
-	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;
 
-	  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];
-	    }
-	  }
+	  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`
 
-	  switch (this.type) {
-	    case 1:
-	      var points = [];
 
-	      for (i = 0; i < coords.length; i++) {
-	        points[i] = coords[i][0];
-	      }
+	  tree.waySegments = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+	      return bbox.segment;
+	    });
+	  };
 
-	      coords = points;
-	      project(coords);
-	      break;
+	  return tree;
+	}
 
-	    case 2:
-	      for (i = 0; i < coords.length; i++) {
-	        project(coords[i]);
-	      }
+	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);
+	  };
+	}
 
-	      break;
+	function uiModal(selection, blocking) {
+	  var _this = this;
 
-	    case 3:
-	      coords = classifyRings(coords);
+	  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);
 
-	      for (i = 0; i < coords.length; i++) {
-	        for (j = 0; j < coords[i].length; j++) {
-	          project(coords[i][j]);
-	        }
-	      }
+	  shaded.close = function () {
+	    shaded.transition().duration(200).style('opacity', 0).remove();
+	    modal.transition().duration(200).style('top', '0px');
+	    select(document).call(keybinding.unbind);
+	  };
 
-	      break;
-	  }
+	  var modal = shaded.append('div').attr('class', 'modal fillL');
+	  modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
-	  if (coords.length === 1) {
-	    coords = coords[0];
-	  } else {
-	    type = 'Multi' + type;
+	  if (!blocking) {
+	    shaded.on('click.remove-modal', function (d3_event) {
+	      if (d3_event.target === _this) {
+	        shaded.close();
+	      }
+	    });
+	    modal.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', shaded.close).call(svgIcon('#iD-icon-close'));
+	    keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
+	    select(document).call(keybinding);
 	  }
 
-	  var result = {
-	    type: "Feature",
-	    geometry: {
-	      type: type,
-	      coordinates: coords
-	    },
-	    properties: this.properties
-	  };
+	  modal.append('div').attr('class', 'content');
+	  modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
 
-	  if ('id' in this) {
-	    result.id = this.id;
+	  if (animate) {
+	    shaded.transition().style('opacity', 1);
+	  } else {
+	    shaded.style('opacity', 1);
 	  }
 
-	  return result;
-	}; // classifies an array of rings into polygons with outer rings and holes
+	  return shaded;
 
+	  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();
 
-	function classifyRings(rings) {
-	  var len = rings.length;
-	  if (len <= 1) return [rings];
-	  var polygons = [],
-	      polygon,
-	      ccw;
+	    if (node) {
+	      node.focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
 
-	  for (var i = 0; i < len; i++) {
-	    var area = signedArea$1(rings[i]);
-	    if (area === 0) continue;
-	    if (ccw === undefined) ccw = area < 0;
+	  function moveFocusToLast() {
+	    var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
 
-	    if (ccw === area < 0) {
-	      if (polygon) polygons.push(polygon);
-	      polygon = [rings[i]];
+	    if (nodes.length) {
+	      nodes[nodes.length - 1].focus();
 	    } else {
-	      polygon.push(rings[i]);
+	      select(this).node().blur();
 	    }
 	  }
-
-	  if (polygon) polygons.push(polygon);
-	  return polygons;
 	}
 
-	function signedArea$1(ring) {
-	  var sum = 0;
+	function uiLoading(context) {
+	  var _modalSelection = select(null);
 
-	  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 _message = '';
+	  var _blocking = false;
 
-	  return sum;
-	}
+	  var loading = function loading(selection) {
+	    _modalSelection = uiModal(selection, _blocking);
 
-	var vectortilelayer = VectorTileLayer;
+	    var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-	function VectorTileLayer(pbf, end) {
-	  // Public
-	  this.version = 1;
-	  this.name = null;
-	  this.extent = 4096;
-	  this.length = 0; // Private
+	    loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+	    loadertext.append('h3').html(_message);
 
-	  this._pbf = pbf;
-	  this._keys = [];
-	  this._values = [];
-	  this._features = [];
-	  pbf.readFields(readLayer, this, end);
-	  this.length = this._features.length;
-	}
+	    _modalSelection.select('button.close').attr('class', 'hide');
 
-	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));
-	}
+	    return loading;
+	  };
 
-	function readValueMessage(pbf) {
-	  var value = null,
-	      end = pbf.readVarint() + pbf.pos;
+	  loading.message = function (val) {
+	    if (!arguments.length) return _message;
+	    _message = val;
+	    return loading;
+	  };
 
-	  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;
-	  }
+	  loading.blocking = function (val) {
+	    if (!arguments.length) return _blocking;
+	    _blocking = val;
+	    return loading;
+	  };
 
-	  return value;
-	} // return feature `i` from this layer as a `VectorTileFeature`
+	  loading.close = function () {
+	    _modalSelection.remove();
+	  };
 
+	  loading.isShown = function () {
+	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	  };
 
-	VectorTileLayer.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];
+	  return loading;
+	}
 
-	  var end = this._pbf.readVarint() + this._pbf.pos;
+	function coreHistory(context) {
+	  var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone', 'storage_error');
 
-	  return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-	};
+	  var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
-	var vectortile = VectorTile;
 
-	function VectorTile(pbf, end) {
-	  this.layers = pbf.readFields(readTile, {}, end);
-	}
+	  var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-	function readTile(tag, layers, pbf) {
-	  if (tag === 3) {
-	    var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-	    if (layer.length) layers[layer.name] = layer;
-	  }
-	}
+	  var duration = 150;
+	  var _imageryUsed = [];
+	  var _photoOverlaysUsed = [];
+	  var _checkpoints = {};
 
-	var VectorTile$1 = vectortile;
-	var VectorTileFeature$1 = vectortilefeature;
-	var VectorTileLayer$1 = vectortilelayer;
-	var vectorTile = {
-	  VectorTile: VectorTile$1,
-	  VectorTileFeature: VectorTileFeature$1,
-	  VectorTileLayer: VectorTileLayer$1
-	};
+	  var _pausedGraph;
 
-	var tiler$7 = utilTiler().tileSize(512).margin(1);
-	var dispatch$8 = dispatch('loadedData');
+	  var _stack;
 
-	var _vtCache;
+	  var _index;
 
-	function abortRequest$7(controller) {
-	  controller.abort();
-	}
+	  var _tree; // internal _act, accepts list of actions and eased time
 
-	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 _act(actions, t) {
+	    actions = Array.prototype.slice.call(actions);
+	    var annotation;
 
-	  var features = [];
-	  layers.forEach(function (layerID) {
-	    var layer = vectorTile$1.layers[layerID];
+	    if (typeof actions[actions.length - 1] !== 'function') {
+	      annotation = actions.pop();
+	    }
 
-	    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
+	    var graph = _stack[_index].graph;
 
-	        if (geometry.type === 'Polygon') {
-	          geometry.type = 'MultiPolygon';
-	          geometry.coordinates = [geometry.coordinates];
-	        }
+	    for (var i = 0; i < actions.length; i++) {
+	      graph = actions[i](graph, t);
+	    }
 
-	        var isClipped = false; // Clip to tile bounds
+	    return {
+	      graph: graph,
+	      annotation: annotation,
+	      imageryUsed: _imageryUsed,
+	      photoOverlaysUsed: _photoOverlaysUsed,
+	      transform: context.projection.transform(),
+	      selectedIDs: context.selectedIDs()
+	    };
+	  } // internal _perform with eased time
 
-	        if (geometry.type === 'MultiPolygon') {
-	          var featureClip = turf_bboxClip(feature, tile.extent.rectangle());
 
-	          if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-	            // feature = featureClip;
-	            isClipped = true;
-	          }
+	  function _perform(args, t) {
+	    var previous = _stack[_index].graph;
+	    _stack = _stack.slice(0, _index + 1);
 
-	          if (!feature.geometry.coordinates.length) continue; // not actually on this tile
+	    var actionResult = _act(args, t);
 
-	          if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
-	        } // Generate some unique IDs and add some metadata
+	    _stack.push(actionResult);
 
+	    _index++;
+	    return change(previous);
+	  } // internal _replace with eased time
 
-	        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];
+	  function _replace(args, t) {
+	    var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-	          if (merged && merged.length) {
-	            var other = merged[0];
-	            var coords = union(feature.geometry.coordinates, other.geometry.coordinates);
+	    var actionResult = _act(args, t);
 
-	            if (!coords || !coords.length) {
-	              continue; // something failed in martinez union
-	            }
+	    _stack[_index] = actionResult;
+	    return change(previous);
+	  } // internal _overwrite with eased time
 
-	            merged.push(feature);
 
-	            for (var j = 0; j < merged.length; j++) {
-	              // all these features get...
-	              merged[j].geometry.coordinates = coords; // same coords
+	  function _overwrite(args, t) {
+	    var previous = _stack[_index].graph;
 
-	              merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
-	            }
-	          } else {
-	            mergeCache[propertyhash] = [feature];
-	          }
-	        }
-	      }
-	    }
-	  });
-	  return features;
-	}
+	    if (_index > 0) {
+	      _index--;
 
-	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);
+	      _stack.pop();
 	    }
 
-	    source.loaded[tile.id] = [];
-	    delete source.inflight[tile.id];
-	    return response.arrayBuffer();
-	  }).then(function (data) {
-	    if (!data) {
-	      throw new Error('No Data');
-	    }
+	    _stack = _stack.slice(0, _index + 1);
+
+	    var actionResult = _act(args, t);
+
+	    _stack.push(actionResult);
+
+	    _index++;
+	    return change(previous);
+	  } // determine difference and dispatch a change event
+
 
-	    var z = tile.xyz[2];
+	  function change(previous) {
+	    var difference = coreDifference(previous, history.graph());
 
-	    if (!source.canMerge[z]) {
-	      source.canMerge[z] = {}; // initialize mergeCache
+	    if (!_pausedGraph) {
+	      dispatch.call('change', this, difference);
 	    }
 
-	    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];
-	  });
-	}
+	    return difference;
+	  } // iD uses namespaced keys so multiple installations do not conflict
 
-	var serviceVectorTile = {
-	  init: function init() {
-	    if (!_vtCache) {
-	      this.reset();
-	    }
 
-	    this.event = utilRebind(this, dispatch$8, 'on');
-	  },
-	  reset: function reset() {
-	    for (var sourceID in _vtCache) {
-	      var source = _vtCache[sourceID];
+	  function getKey(n) {
+	    return 'iD_' + window.location.origin + '_' + n;
+	  }
 
-	      if (source && source.inflight) {
-	        Object.values(source.inflight).forEach(abortRequest$7);
+	  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;
+	      });
+
+	      _stack[0].graph.rebase(entities, stack, false);
+
+	      _tree.rebase(entities, false);
+
+	      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];
+
+	      if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+	        transitionable = !!action0.transitionable;
 	      }
-	    }
 
-	    _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$7.getTiles(projection);
-	    var seen = {};
-	    var results = [];
+	      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;
 
-	    for (var i = 0; i < tiles.length; i++) {
-	      var features = source.loaded[tiles[i].id];
-	      if (!features || !features.length) continue;
+	      if (isNaN(+n) || +n < 0) {
+	        n = 1;
+	      }
 
-	      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
+	      while (n-- > 0 && _index > 0) {
+	        _index--;
 
-	        results.push(Object.assign({}, feature)); // shallow copy
+	        _stack.pop();
 	      }
-	    }
 
-	    return results;
-	  },
-	  loadTiles: function loadTiles(sourceID, template, projection) {
-	    var source = _vtCache[sourceID];
+	      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;
 
-	    if (!source) {
-	      source = this.addSource(sourceID, template);
-	    }
+	      while (_index > 0) {
+	        _index--;
+	        if (_stack[_index].annotation) break;
+	      }
 
-	    var tiles = tiler$7.getTiles(projection); // abort inflight requests that are no longer needed
+	      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;
 
-	    Object.keys(source.inflight).forEach(function (k) {
-	      var wanted = tiles.find(function (tile) {
-	        return k === tile.id;
-	      });
+	      while (tryIndex < _stack.length - 1) {
+	        tryIndex++;
 
-	      if (!wanted) {
-	        abortRequest$7(source.inflight[k]);
-	        delete source.inflight[k];
+	        if (_stack[tryIndex].annotation) {
+	          _index = tryIndex;
+	          dispatch.call('redone', this, _stack[_index], previousStack);
+	          break;
+	        }
 	      }
-	    });
-	    tiles.forEach(function (tile) {
-	      loadTile(source, tile);
-	    });
-	  },
-	  cache: function cache() {
-	    return _vtCache;
-	  }
-	};
 
-	var apibase$3 = '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 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;
 
-	    var lang = this.languagesToQuery()[0];
-	    var url = apibase$3 + 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);
+	      while (i >= 0) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i--;
 	      }
+	    },
+	    redoAnnotation: function redoAnnotation() {
+	      var i = _index + 1;
 
-	      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;
-	    }
+	      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;
 
-	    lang = lang || 'en';
-	    var url = apibase$3 + 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);
+	      if (action) {
+	        head = action(head);
 	      }
 
-	      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;
-	    }
+	      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();
 
-	    if (_wikidataCache[qid]) {
-	      if (callback) callback(null, _wikidataCache[qid]);
-	      return;
-	    }
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          state.imageryUsed.forEach(function (source) {
+	            if (source !== 'Custom') {
+	              s.add(source);
+	            }
+	          });
+	        });
 
-	    var langs = this.languagesToQuery();
-	    var url = apibase$3 + 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);
+	        return Array.from(s);
 	      }
+	    },
+	    photoOverlaysUsed: function photoOverlaysUsed(sources) {
+	      if (sources) {
+	        _photoOverlaysUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
 
-	      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;
+	        _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);
+	      }
+	    },
+	    // 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 i;
-	      var description;
+	      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..
 
-	      for (i in langs) {
-	        var code = langs[i];
+	      Object.values(graph.base().entities).forEach(function (entity) {
+	        var copy = copyIntroEntity(entity);
+	        baseEntities[copy.id] = copy;
+	      }); // replace base entities with head entities..
 
-	        if (entity.descriptions[code] && entity.descriptions[code].language === code) {
-	          description = entity.descriptions[code];
-	          break;
+	      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];
 	        }
-	      }
+	      }); // swap temporary for permanent ids..
 
-	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+	      Object.values(baseEntities).forEach(function (entity) {
+	        if (Array.isArray(entity.nodes)) {
+	          entity.nodes = entity.nodes.map(function (node) {
+	            return permIDs[node] || node;
+	          });
+	        }
 
-	      var result = {
-	        title: entity.id,
-	        description: description ? description.value : '',
-	        descriptionLocaleCode: description ? description.language : '',
-	        editURL: 'https://www.wikidata.org/wiki/' + entity.id
-	      }; // add image
+	        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
+	      });
 
-	      if (entity.claims) {
-	        var imageroot = 'https://commons.wikimedia.org/w/index.php';
-	        var props = ['P154', 'P18']; // logo image, image
+	      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 prop, image;
+	        if (copy.tags && !Object.keys(copy.tags)) {
+	          delete copy.tags;
+	        }
 
-	        for (i = 0; i < props.length; i++) {
-	          prop = entity.claims[props[i]];
+	        if (Array.isArray(copy.loc)) {
+	          copy.loc[0] = +copy.loc[0].toFixed(6);
+	          copy.loc[1] = +copy.loc[1].toFixed(6);
+	        }
+
+	        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));
+
+	          copy.id = permIDs[source.id] = permID;
+	        }
+
+	        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 (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 (id in base.graph.entities) {
+	            baseEntities[id] = base.graph.entities[id];
 	          }
-	        }
-	      }
-
-	      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 && 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
 
-	          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..
-	            }
+	          var baseParents = base.graph._parentWays[id];
 
-	            result.wiki = {
-	              title: title,
-	              text: tKey,
-	              url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-	            };
-	            break;
+	          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;
+	      });
 
-	      callback(null, result);
-	    });
-	  }
-	};
+	      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;
 
-	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;
-	    }
+	      if (h.version === 2 || h.version === 3) {
+	        var allEntities = {};
+	        h.entities.forEach(function (entity) {
+	          allEntities[osmEntity.key(entity)] = osmEntity(entity);
+	        });
 
-	    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');
-	      }
+	        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);
+	          });
 
-	      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;
-	    }
+	          var stack = _stack.map(function (state) {
+	            return state.graph;
+	          });
 
-	    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');
-	      }
+	          _stack[0].graph.rebase(baseEntities, stack, true);
 
-	      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;
-	    }
+	          _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
 
-	    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');
-	      }
 
-	      if (callback) {
-	        var list = result.query.pages[Object.keys(result.query.pages)[0]];
-	        var translations = {};
+	          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 (list && list.langlinks) {
-	          list.langlinks.forEach(function (d) {
-	            translations[d.lang] = d['*'];
-	          });
-	        }
+	            if (missing.length && osm) {
+	              loadComplete = false;
+	              context.map().redrawEnable(false);
+	              var loading = uiLoading(context).blocking(true);
+	              context.container().call(loading);
 
-	        callback(null, translations);
-	      }
-	    })["catch"](function (err) {
-	      if (callback) callback(err.message);
-	    });
-	  }
-	};
+	              var childNodesLoaded = function childNodesLoaded(err, result) {
+	                if (!err) {
+	                  var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+	                  var visibles = visibleGroups["true"] || []; // alive nodes
 
-	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
-	};
+	                  var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-	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 (visibles.length) {
+	                    var visibleIDs = visibles.map(function (entity) {
+	                      return entity.id;
+	                    });
 
-	function uiNoteComments() {
-	  var _note;
+	                    var stack = _stack.map(function (state) {
+	                      return state.graph;
+	                    });
 
-	  function noteComments(selection) {
-	    if (_note.isNew()) return; // don't draw .comments-container
+	                    missing = utilArrayDifference(missing, visibleIDs);
 
-	    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;
+	                    _stack[0].graph.rebase(visibles, stack, true);
 
-	      if (osm && d.user) {
-	        selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
-	      }
+	                    _tree.rebase(visibles, true);
+	                  } // fetch older versions of nodes that were deleted..
 
-	      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);
-	  }
 
-	  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
+	                  invisibles.forEach(function (entity) {
+	                    osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+	                  });
+	                }
 
-	    _note.comments.forEach(function (d) {
-	      if (d.uid) uids[d.uid] = true;
-	    });
+	                if (err || !missing.length) {
+	                  loading.close();
+	                  context.map().redrawEnable(true);
+	                  dispatch.call('change');
+	                  dispatch.call('restore', this);
+	                }
+	              };
 
-	    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);
-	      });
-	    });
-	  }
+	              osm.loadMultiple(missing, childNodesLoaded);
+	            }
+	          }
+	        }
 
-	  function localeDateString(s) {
-	    if (!s) return null;
-	    var options = {
-	      day: 'numeric',
-	      month: 'short',
-	      year: 'numeric'
-	    };
-	    s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
+	        _stack = h.stack.map(function (d) {
+	          var entities = {},
+	              entity;
 
-	    var d = new Date(s);
-	    if (isNaN(d.getTime())) return null;
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-	  }
+	          if (d.modified) {
+	            d.modified.forEach(function (key) {
+	              entity = allEntities[key];
+	              entities[entity.id] = entity;
+	            });
+	          }
 
-	  noteComments.note = function (val) {
-	    if (!arguments.length) return _note;
-	    _note = val;
-	    return noteComments;
-	  };
+	          if (d.deleted) {
+	            d.deleted.forEach(function (id) {
+	              entities[id] = undefined;
+	            });
+	          }
 
-	  return noteComments;
-	}
+	          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 = {};
 
-	function uiNoteHeader() {
-	  var _note;
+	          for (var i in d.entities) {
+	            var entity = d.entities[i];
+	            entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+	          }
 
-	  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 = '#iD-icon-' + (d.id < 0 ? 'plus' : d.status === 'open' ? 'close' : 'apply');
-	      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');
+	          d.graph = coreGraph(_stack[0].graph).load(entities);
+	          return d;
+	        });
 	      }
 
-	      return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
-	    });
-	  }
+	      var transform = _stack[_index].transform;
 
-	  noteHeader.note = function (val) {
-	    if (!arguments.length) return _note;
-	    _note = val;
-	    return noteHeader;
-	  };
+	      if (transform) {
+	        context.map().transformEase(transform, 0); // 0 = immediate, no easing
+	      }
 
-	  return noteHeader;
-	}
+	      if (loadComplete) {
+	        dispatch.call('change');
+	        dispatch.call('restore', this);
+	      }
 
-	function uiNoteReport() {
-	  var _note;
+	      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');
+	      }
 
-	  function noteReport(selection) {
-	    var url;
+	      return history;
+	    },
+	    // delete the history version saved in localStorage
+	    clearSaved: function clearSaved() {
+	      context.debouncedSave.cancel();
 
-	    if (services.osm && _note instanceof osmNote && !_note.isNew()) {
-	      url = services.osm.noteReportURL(_note);
-	    }
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
 
-	    var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
+	        corePreferences('comment', null);
+	        corePreferences('hashtags', null);
+	        corePreferences('source', null);
+	      }
 
-	    link.exit().remove(); // enter
+	      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');
+	}
 
-	    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'));
-	  }
+	/**
+	 * Look for roads that can be connected to other roads with a short extension
+	 */
 
-	  noteReport.note = function (val) {
-	    if (!arguments.length) return _note;
-	    _note = val;
-	    return noteReport;
-	  };
+	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
 
-	  return noteReport;
-	}
+	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-	function uiViewOnOSM(context) {
-	  var _what; // an osmEntity or osmNote
+	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
+	  function isHighway(entity) {
+	    return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	  function viewOnOSM(selection) {
-	    var url;
+	  function isTaggedAsNotContinuing(node) {
+	    return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+	  }
 
-	    if (_what instanceof osmEntity) {
-	      url = context.connection().entityURL(_what);
-	    } else if (_what instanceof osmNote) {
-	      url = context.connection().noteURL(_what);
-	    }
+	  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]);
 
-	    var data = !_what || _what.isNew() ? [] : [_what];
-	    var link = selection.selectAll('.view-on-osm').data(data, function (d) {
-	      return d.id;
-	    }); // exit
+	          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;
 
-	    link.exit().remove(); // enter
+	    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');
 
-	    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'));
-	  }
+	          var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+	              endNodeId = _this$issue$entityIds[1],
+	              crossWayId = _this$issue$entityIds[2];
 
-	  viewOnOSM.what = function (_) {
-	    if (!arguments.length) return _what;
-	    _what = _;
-	    return viewOnOSM;
-	  };
+	          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)
 
-	  return viewOnOSM;
-	}
+	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-	function uiNoteEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var noteComments = uiNoteComments();
-	  var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
+	          if (nearEndNodes.length > 0) {
+	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-	  var _note;
+	            if (collinear) {
+	              context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+	              return;
+	            }
+	          }
 
-	  var _newNote; // var _fieldsArr;
+	          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
 
+	          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);
+	          }
+	        }
+	      })];
+	      var node = context.hasEntity(this.entityIds[1]);
 
-	  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
+	      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'));
+	          }
+	        }));
+	      }
 
-	    var osm = services.osm;
+	      return fixes;
+	    }
 
-	    if (osm) {
-	      osm.on('change.note-save', function () {
-	        selection.call(noteEditor);
-	      });
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.almost_junction.highway-highway.reference'));
 	    }
-	  }
 
-	  function noteSaveSection(selection) {
-	    var isSelected = _note && _note.id === context.selectedNoteID();
+	    function isExtendableCandidate(node, way) {
+	      // can not accurately test vertices on tiles not downloaded from osm - #5938
+	      var osm = services.osm;
 
-	    var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
-	      return d.status + d.id;
-	    }); // exit
+	      if (osm && !osm.isDataLoaded(node.loc)) {
+	        return false;
+	      }
 
-	    noteSave.exit().remove(); // enter
+	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+	        return false;
+	      }
 
-	    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 occurrences = 0;
 
-	    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);
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === node.id) {
+	          occurrences += 1;
 
-	    if (!commentTextarea.empty() && _newNote) {
-	      // autofocus the comment field for new notes
-	      commentTextarea.node().focus();
-	    } // update
+	          if (occurrences > 1) {
+	            return false;
+	          }
+	        }
+	      }
 
+	      return true;
+	    }
 
-	    noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
+	    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
 
-	    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
+	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-	      window.setTimeout(function () {
-	        if (_note.isNew()) {
-	          noteSave.selectAll('.save-button').node().focus();
-	          clickSave();
-	        } else {
-	          noteSave.selectAll('.comment-button').node().focus();
-	          clickComment();
-	        }
-	      }, 10);
+	        if (geoHasSelfIntersections(testNodes, nodeID)) return;
+	        results.push(connectionInfo);
+	      });
+	      return results;
 	    }
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
-
-	      _note = _note.update({
-	        newComment: val
+	    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;
 	      });
-	      var osm = services.osm;
-
-	      if (osm) {
-	        osm.replaceNote(_note); // update note cache
-	      }
-
-	      noteSave.call(noteSaveButtons);
 	    }
-	  }
 
-	  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
+	    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
 
-	    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'));
+	      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);
 
-	      if (user.image_url) {
-	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
-	      }
+	        if (diff < minAngle) {
+	          joinTo = endNode;
+	          minAngle = diff;
+	        }
+	      });
+	      /* Threshold set by considering right angle triangle
+	      based on node joining threshold and extension distance */
 
-	      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()
-	      }));
-	    });
-	  }
+	      if (minAngle <= SIG_ANGLE_TH) return joinTo;
+	      return null;
+	    }
 
-	  function noteSaveButtons(selection) {
-	    var osm = services.osm;
-	    var hasAuth = osm && osm.authenticated();
+	    function hasTag(tags, key) {
+	      return tags[key] !== undefined && tags[key] !== 'no';
+	    }
 
-	    var isSelected = _note && _note.id === context.selectedNoteID();
+	    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
 
-	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
-	      return d.status + d.id;
-	    }); // exit
+	      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
 
-	    buttonSection.exit().remove(); // enter
+	      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 buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    function canConnectByExtend(way, endNodeIdx) {
+	      var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
-	    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
+	      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
 
-	    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);
+	      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
 
-	    function isSaveDisabled(d) {
-	      return hasAuth && d.status === 'open' && d.newComment ? null : true;
-	    }
-	  }
+	      var segmentInfos = tree.waySegments(queryExtent, graph);
 
-	  function clickCancel(d3_event, d) {
-	    this.blur(); // avoid keeping focus on the button - #4641
+	      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]);
 
-	    var osm = services.osm;
+	        if (crossLoc) {
+	          return {
+	            mid: midNode,
+	            node: tipNode,
+	            wid: way2.id,
+	            edge: [nA.id, nB.id],
+	            cross_loc: crossLoc
+	          };
+	        }
+	      }
 
-	    if (osm) {
-	      osm.removeNote(d);
+	      return null;
 	    }
+	  };
 
-	    context.enter(modeBrowse(context));
-	    dispatch$1.call('change');
-	  }
-
-	  function clickSave(d3_event, d) {
-	    this.blur(); // avoid keeping focus on the button - #4641
+	  validation.type = type;
+	  return validation;
+	}
 
-	    var osm = services.osm;
+	function validationCloseNodes(context) {
+	  var type = 'close_nodes';
+	  var pointThresholdMeters = 0.2;
 
-	    if (osm) {
-	      osm.postNoteCreate(d, function (err, note) {
-	        dispatch$1.call('change', note);
-	      });
+	  var validation = function validation(entity, graph) {
+	    if (entity.type === 'node') {
+	      return getIssuesForNode(entity);
+	    } else if (entity.type === 'way') {
+	      return getIssuesForWay(entity);
 	    }
-	  }
 
-	  function clickStatus(d3_event, d) {
-	    this.blur(); // avoid keeping focus on the button - #4641
+	    return [];
 
-	    var osm = services.osm;
+	    function getIssuesForNode(node) {
+	      var parentWays = graph.parentWays(node);
 
-	    if (osm) {
-	      var setStatus = d.status === 'open' ? 'closed' : 'open';
-	      osm.postNoteUpdate(d, setStatus, function (err, note) {
-	        dispatch$1.call('change', note);
-	      });
+	      if (parentWays.length) {
+	        return getIssuesForVertex(node, parentWays);
+	      } else {
+	        return getIssuesForDetachedPoint(node);
+	      }
 	    }
-	  }
 
-	  function clickComment(d3_event, d) {
-	    this.blur(); // avoid keeping focus on the button - #4641
+	    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);
 
-	    var osm = services.osm;
+	      for (var i in parentRelations) {
+	        var relation = parentRelations[i];
+	        if (relation.tags.type === 'boundary') return 'boundary';
 
-	    if (osm) {
-	      osm.postNoteUpdate(d, d.status, function (err, note) {
-	        dispatch$1.call('change', note);
-	      });
-	    }
-	  }
+	        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';
+	        }
+	      }
 
-	  noteEditor.note = function (val) {
-	    if (!arguments.length) return _note;
-	    _note = val;
-	    return noteEditor;
-	  };
+	      return 'other';
+	    }
 
-	  noteEditor.newNote = function (val) {
-	    if (!arguments.length) return _newNote;
-	    _newNote = val;
-	    return noteEditor;
-	  };
+	    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
 
-	  return utilRebind(noteEditor, dispatch$1, 'on');
-	}
+	      if (hypotenuseMeters < 1.5) return false;
+	      return true;
+	    }
 
-	function modeSelectNote(context, selectedNoteID) {
-	  var mode = {
-	    id: 'select-note',
-	    button: 'browse'
-	  };
+	    function getIssuesForWay(way) {
+	      if (!shouldCheckWay(way)) return [];
+	      var issues = [],
+	          nodes = graph.childNodes(way);
 
-	  var _keybinding = utilKeybinding('select-note');
+	      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 _noteEditor = uiNoteEditor(context).on('change', function () {
-	    context.map().pan([0, 0]); // trigger a redraw
+	      return issues;
+	    }
 
-	    var note = checkSelectedID();
-	    if (!note) return;
-	    context.ui().sidebar.show(_noteEditor.note(note));
-	  });
+	    function getIssuesForVertex(node, parentWays) {
+	      var issues = [];
 
-	  var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
-	  var _newFeature = false;
+	      function checkForCloseness(node1, node2, way) {
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	  function checkSelectedID() {
-	    if (!services.osm) return;
-	    var note = services.osm.getNote(selectedNoteID);
+	      for (var i = 0; i < parentWays.length; i++) {
+	        var parentWay = parentWays[i];
+	        if (!shouldCheckWay(parentWay)) continue;
+	        var lastIndex = parentWay.nodes.length - 1;
 
-	    if (!note) {
-	      context.enter(modeBrowse(context));
-	    }
+	        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);
+	            }
+	          }
 
-	    return note;
-	  } // class the note as selected, or return to browse mode if the note is gone
+	          if (j !== lastIndex) {
+	            if (parentWay.nodes[j + 1] === node.id) {
+	              checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+	            }
+	          }
+	        }
+	      }
 
+	      return issues;
+	    }
 
-	  function selectNote(d3_event, drawn) {
-	    if (!checkSelectedID()) return;
-	    var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+	    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
 
-	    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;
+	      if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	        context.enter(modeBrowse(context));
-	      }
-	    } else {
-	      selection.classed('selected', true);
-	      context.selectedNoteID(selectedNoteID);
+	      if (wayType === 'indoor') return 0.01;
+	      if (wayType === 'building') return 0.05;
+	      if (wayType === 'path') return 0.1;
+	      return 0.2;
 	    }
-	  }
 
-	  function esc() {
-	    if (context.container().select('.combobox').size()) return;
-	    context.enter(modeBrowse(context));
-	  }
+	    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);
 
-	  mode.zoomToSelected = function () {
-	    if (!services.osm) return;
-	    var note = services.osm.getNote(selectedNoteID);
+	      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;
 
-	    if (note) {
-	      context.map().centerZoomEase(note.loc, 20);
-	    }
-	  };
+	        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;
 
-	  mode.newFeature = function (val) {
-	    if (!arguments.length) return _newFeature;
-	    _newFeature = val;
-	    return mode;
-	  };
+	          for (var key in zAxisKeys) {
+	            var nodeValue = node.tags[key] || '0';
+	            var nearbyValue = nearby.tags[key] || '0';
 
-	  mode.enter = function () {
-	    var note = checkSelectedID();
-	    if (!note) return;
+	            if (nodeValue !== nearbyValue) {
+	              zAxisDifferentiates = true;
+	              break;
+	            }
+	          }
 
-	    _behaviors.forEach(context.install);
+	          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')
+	              })];
+	            }
+	          }));
+	        }
+	      }
 
-	    _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	      return issues;
 
-	    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
+	      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);
+	      }
+	    }
 
-	    sidebar.expand(sidebar.intersects(note.extent()));
-	    context.map().on('drawn.select', selectNote);
-	  };
+	    function getWayIssueIfAny(node1, node2, way) {
+	      if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+	        return null;
+	      }
 
-	  mode.exit = function () {
-	    _behaviors.forEach(context.uninstall);
+	      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;
+	      }
 
-	    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);
+	      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')
+	          })];
+	        }
+	      });
+
+	      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);
+	      }
+	    }
 	  };
 
-	  return mode;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function modeDragNote(context) {
-	  var mode = {
-	    id: 'drag-note',
-	    button: 'browse'
-	  };
-	  var edit = behaviorEdit(context);
-
-	  var _nudgeInterval;
+	function validationCrossingWays(context) {
+	  var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-	  var _lastLoc;
+	  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);
 
-	  var _note; // most current note.. dragged note may have stale datum.
+	      for (var i = 0; i < parentRels.length; i++) {
+	        var rel = parentRels[i];
 
+	        if (getFeatureType(rel, graph) !== null) {
+	          return rel;
+	        }
+	      }
+	    }
 
-	  function startNudge(d3_event, nudge) {
-	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-	    _nudgeInterval = window.setInterval(function () {
-	      context.map().pan(nudge);
-	      doMove(d3_event, nudge);
-	    }, 50);
+	    return way;
 	  }
 
-	  function stopNudge() {
-	    if (_nudgeInterval) {
-	      window.clearInterval(_nudgeInterval);
-	      _nudgeInterval = null;
-	    }
+	  function hasTag(tags, key) {
+	    return tags[key] !== undefined && tags[key] !== 'no';
 	  }
 
-	  function origin(note) {
-	    return context.projection(note.loc);
+	  function taggedAsIndoor(tags) {
+	    return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
 	  }
 
-	  function start(d3_event, 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);
-	    }
-
-	    context.surface().selectAll('.note-' + _note.id).classed('active', true);
-	    context.perform(actionNoop());
-	    context.enter(mode);
-	    context.selectedNoteID(_note.id);
+	  function allowsBridge(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
 	  }
 
-	  function move(d3_event, entity, point) {
-	    d3_event.stopPropagation();
-	    _lastLoc = context.projection.invert(point);
-	    doMove(d3_event);
-	    var nudge = geoViewportEdge(point, context.map().dimensions());
+	  function allowsTunnel(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  } // discard
 
-	    if (nudge) {
-	      startNudge(d3_event, nudge);
-	    } else {
-	      stopNudge();
-	    }
-	  }
 
-	  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;
+	  var ignoredBuildings = {
+	    demolished: true,
+	    dismantled: true,
+	    proposed: true,
+	    razed: true
+	  };
 
-	    if (osm) {
-	      osm.replaceNote(_note); // update note cache
-	    }
+	  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
 
-	    context.replace(actionNoop()); // trigger redraw
+	    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 end() {
-	    context.replace(actionNoop()); // trigger redraw
-
-	    context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
-	  }
+	  function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+	    // assume 0 by default
+	    var level1 = tags1.level || '0';
+	    var level2 = tags2.level || '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);
+	    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
 
-	  mode.enter = function () {
-	    context.install(edit);
-	  };
 
-	  mode.exit = function () {
-	    context.ui().sidebar.hover.cancel();
-	    context.uninstall(edit);
-	    context.surface().selectAll('.active').classed('active', false);
-	    stopNudge();
-	  };
+	    var layer1 = tags1.layer || '0';
+	    var layer2 = tags2.layer || '0';
 
-	  mode.behavior = drag;
-	  return mode;
-	}
+	    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
 
-	function uiDataHeader() {
-	  var _datum;
+	      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 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'));
-	  }
+	    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
 
-	  dataHeader.datum = function (val) {
-	    if (!arguments.length) return _datum;
-	    _datum = val;
-	    return this;
-	  };
+	      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 dataHeader;
-	}
 
-	// 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
-	//   }, ...]
+	    if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+	    if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
-	var _comboHideTimerID;
+	    if (featureType1 === 'building' || featureType2 === 'building') {
+	      // for building crossings, different layers are enough
+	      if (layer1 !== layer2) return true;
+	    }
 
-	function uiCombobox(context, klass) {
-	  var dispatch$1 = dispatch('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;
+	    return false;
+	  } // highway values for which we shouldn't recommend connecting to waterways
 
-	  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;
-	      });
-	    }));
+	  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 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
+	  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';
 
-	        input.node().focus(); // focus the input as if it was clicked
+	    if (featureType1 === featureType2) {
+	      if (featureType1 === 'highway') {
+	        var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+	        var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
 
-	        mousedown(d3_event);
-	      }).on('mouseup.combo-caret', function (d3_event) {
-	        d3_event.preventDefault(); // don't steal focus from input
+	        if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+	          // one feature is a path but not both
+	          var roadFeature = entity1IsPath ? entity2 : entity1;
 
-	        mouseup(d3_event);
-	      });
-	    });
+	          if (nonCrossingHighways[roadFeature.tags.highway]) {
+	            // don't mark path connections with certain roads as crossings
+	            return {};
+	          }
 
-	    function mousedown(d3_event) {
-	      if (d3_event.button !== 0) return; // left click only
+	          var pathFeature = entity1IsPath ? entity1 : entity2;
 
-	      _tDown = +new Date(); // clear selection
+	          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
 
-	      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;
-	      }
+	          return bothLines ? {
+	            highway: 'crossing'
+	          } : {};
+	        }
 
-	      input.on('mouseup.combo-input', mouseup);
-	    }
+	        return {};
+	      }
 
-	    function mouseup(d3_event) {
-	      input.on('mouseup.combo-input', null);
-	      if (d3_event.button !== 0) return; // left click only
+	      if (featureType1 === 'waterway') return {};
+	      if (featureType1 === 'railway') return {};
+	    } else {
+	      var featureTypes = [featureType1, featureType2];
 
-	      if (input.node() !== document.activeElement) return; // exit if this input is not focused
+	      if (featureTypes.indexOf('highway') !== -1) {
+	        if (featureTypes.indexOf('railway') !== -1) {
+	          if (!bothLines) return {};
+	          var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
-	      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.
+	          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 combo = container.selectAll('.combobox');
+	            return {
+	              railway: 'crossing'
+	            };
+	          } else {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_level_crossing'
+	            }; // other road-rail connections use this tag
 
-	      if (combo.empty() || combo.datum() !== input.node()) {
-	        var tOrig = _tDown;
-	        window.setTimeout(function () {
-	          if (tOrig !== _tDown) return; // exit if user double clicked
+	            return {
+	              railway: 'level_crossing'
+	            };
+	          }
+	        }
 
-	          fetchComboData('', function () {
-	            show();
-	            render();
-	          });
-	        }, 250);
-	      } else {
-	        hide();
-	      }
-	    }
+	        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;
 
-	    function focus() {
-	      fetchComboData(''); // prefetch values (may warm taginfo cache)
-	    }
+	          if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+	            // do not allow fords on major highways
+	            return null;
+	          }
 
-	    function blur() {
-	      _comboHideTimerID = window.setTimeout(hide, 75);
+	          return bothLines ? {
+	            ford: 'yes'
+	          } : {};
+	        }
+	      }
 	    }
 
-	    function show() {
-	      hide(); // remove any existing
+	    return null;
+	  }
 
-	      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 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 hide() {
-	      if (_comboHideTimerID) {
-	        window.clearTimeout(_comboHideTimerID);
-	        _comboHideTimerID = undefined;
-	      }
+	    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 = {};
 
-	      container.selectAll('.combobox').remove();
-	      container.on('scroll.combo-scroll', null);
-	    }
+	    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
 
-	    function keydown(d3_event) {
-	      var shown = !container.selectAll('.combobox').empty();
-	      var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+	      segmentInfos = tree.waySegments(extent, graph);
 
-	      switch (d3_event.keyCode) {
-	        case 8: // ⌫ Backspace
+	      for (j = 0; j < segmentInfos.length; j++) {
+	        segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
-	        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;
+	        if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-	        case 9:
-	          // ⇥ Tab
-	          accept();
-	          break;
+	        if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
 
-	        case 13:
-	          // ↩ Return
-	          d3_event.preventDefault();
-	          d3_event.stopPropagation();
-	          break;
+	        comparedWays[segment2Info.wayId] = true;
+	        way2 = graph.hasEntity(segment2Info.wayId);
+	        if (!way2) continue;
+	        taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-	        case 38:
-	          // ↑ Up arrow
-	          if (tagName === 'textarea' && !shown) return;
-	          d3_event.preventDefault();
+	        way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-	          if (tagName === 'input' && !shown) {
-	            show();
-	          }
+	        if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+	          continue;
+	        } // create only one issue for building crossings
 
-	          nav(-1);
-	          break;
 
-	        case 40:
-	          // ↓ Down arrow
-	          if (tagName === 'textarea' && !shown) return;
-	          d3_event.preventDefault();
+	        oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	        nAId = segment2Info.nodes[0];
+	        nBId = segment2Info.nodes[1];
 
-	          if (tagName === 'input' && !shown) {
-	            show();
-	          }
+	        if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+	          // n1 or n2 is a connection node; skip
+	          continue;
+	        }
 
-	          nav(+1);
-	          break;
-	      }
-	    }
+	        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);
 
-	    function keyup(d3_event) {
-	      switch (d3_event.keyCode) {
-	        case 27:
-	          // ⎋ Escape
-	          cancel();
-	          break;
+	        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
+	          });
 
-	        case 13:
-	          // ↩ Return
-	          accept();
-	          break;
+	          if (oneOnly) {
+	            checkedSingleCrossingWays[way2.id] = true;
+	            break;
+	          }
+	        }
 	      }
-	    } // Called whenever the input value is changed (e.g. on typing)
+	    }
 
+	    return edgeCrossInfos;
+	  }
 
-	    function change() {
-	      fetchComboData(value(), function () {
-	        _selected = null;
-	        var val = input.property('value');
+	  function waysToCheck(entity, graph) {
+	    var featureType = getFeatureType(entity, graph);
+	    if (!featureType) return [];
 
-	        if (_suggestions.length) {
-	          if (input.property('selectionEnd') === val.length) {
-	            _selected = tryAutocomplete();
-	          }
+	    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 (!_selected) {
-	            _selected = val;
+	          if (entity && array.indexOf(entity) === -1) {
+	            array.push(entity);
 	          }
 	        }
 
-	        if (val.length) {
-	          var combo = container.selectAll('.combobox');
+	        return array;
+	      }, []);
+	    }
 
-	          if (combo.empty()) {
-	            show();
-	          }
-	        } else {
-	          hide();
-	        }
+	    return [];
+	  }
 
-	        render();
-	      });
-	    } // Called when the user presses up/down arrows to navigate the list
+	  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
 
+	    var wayIndex, crossingIndex, crossings;
 
-	    function nav(dir) {
-	      if (_suggestions.length) {
-	        // try to determine previously selected index..
-	        var index = -1;
+	    for (wayIndex in ways) {
+	      crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-	        for (var i = 0; i < _suggestions.length; i++) {
-	          if (_selected && _suggestions[i].value === _selected) {
-	            index = i;
-	            break;
-	          }
-	        } // pick new _selected
+	      for (crossingIndex in crossings) {
+	        issues.push(createIssue(crossings[crossingIndex], graph));
+	      }
+	    }
+
+	    return issues;
+	  };
 
+	  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;
 
-	        index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-	        _selected = _suggestions[index].value;
-	        input.property('value', _selected);
+	      if (type1 === type2) {
+	        return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+	      } else if (type1 === 'waterway') {
+	        return true;
+	      } else if (type2 === 'waterway') {
+	        return false;
 	      }
 
-	      render();
-	      ensureVisible();
+	      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';
 	    }
 
-	    function ensureVisible() {
-	      var combo = container.selectAll('.combobox');
-	      if (combo.empty()) return;
-	      var containerRect = container.node().getBoundingClientRect();
-	      var comboRect = combo.node().getBoundingClientRect();
+	    if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+	      crossingTypeID += '_connectable';
+	    } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
 
-	      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
 
+	    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 = [];
 
-	      var selected = combo.selectAll('.combobox-option.selected').node();
+	        if (connectionTags) {
+	          fixes.push(makeConnectWaysFix(this.data.connectionTags));
+	        }
 
-	      if (selected) {
-	        selected.scrollIntoView({
-	          behavior: 'smooth',
-	          block: 'nearest'
-	        });
-	      }
-	    }
+	        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
 
-	    function value() {
-	      var value = input.property('value');
-	      var start = input.property('selectionStart');
-	      var end = input.property('selectionEnd');
 
-	      if (start && end) {
-	        value = value.substring(0, start);
+	          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
+
+
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-move',
+	          title: _t.html('issues.fix.reposition_features.title')
+	        }));
+	        return fixes;
 	      }
+	    });
 
-	      return value;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.crossing_ways.' + crossingTypeID + '.reference'));
 	    }
+	  }
 
-	    function fetchComboData(v, cb) {
-	      _cancelFetch = false;
-
-	      _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;
-	        });
+	  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 (cb) {
-	          cb();
+	        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 tryAutocomplete() {
-	      if (!_canAutocomplete) return;
-	      var val = _caseSensitive ? value() : value().toLowerCase();
-	      if (!val) return; // Don't autocomplete if user is typing a number - #4935
+	        var crossingLoc = this.issue.loc;
+	        var projection = context.projection;
 
-	      if (!isNaN(parseFloat(val)) && isFinite(val)) return;
-	      var bestIndex = -1;
+	        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
 
-	      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..
+	          var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-	        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;
-	        }
-	      }
+	          if (!structLengthMeters) {
+	            // if no explicit width is set, approximate the width based on the tags
+	            structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+	          }
 
-	      if (bestIndex !== -1) {
-	        var bestVal = _suggestions[bestIndex].value;
-	        input.property('value', bestVal);
-	        input.node().setSelectionRange(val.length, bestVal.length);
-	        return bestVal;
-	      }
-	    }
+	          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;
+	          }
 
-	    function render() {
-	      if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-	        hide();
-	        return;
-	      }
+	          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 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
+	          structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-	      options.enter().append('a').attr('class', 'combobox-option').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.
+	          structLengthMeters += 4; // clamp the length to a reasonable range
 
+	          structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-	    function accept(d3_event, d) {
-	      _cancelFetch = true;
-	      var thiz = input.node();
+	          function geomToProj(geoPoint) {
+	            return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+	          }
 
-	      if (d) {
-	        // user clicked on a suggestion
-	        utilGetSetValue(input, d.value); // replace field contents
+	          function projToGeom(projPoint) {
+	            var lat = geoMetersToLat(projPoint[1]);
+	            return [geoMetersToLon(projPoint[0], lat), lat];
+	          }
 
-	        utilTriggerEvent(input, 'change');
-	      } // clear (and keep) selection
+	          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]);
+	          }
 
-	      var val = utilGetSetValue(input);
-	      thiz.setSelectionRange(val.length, val.length);
-	      d = _fetched[val];
-	      dispatch$1.call('accept', thiz, d, val);
-	      hide();
-	    } // Dispatches an 'cancel' event
-	    // Then hides the combobox.
+	          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
 
-	    function cancel() {
-	      _cancelFetch = true;
-	      var thiz = input.node(); // 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);
-	      dispatch$1.call('cancel', thiz);
-	      hide();
-	    }
-	  };
+	          var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-	  combobox.canAutocomplete = function (val) {
-	    if (!arguments.length) return _canAutocomplete;
-	    _canAutocomplete = val;
-	    return combobox;
-	  };
+	          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
 
-	  combobox.caseSensitive = function (val) {
-	    if (!arguments.length) return _caseSensitive;
-	    _caseSensitive = val;
-	    return combobox;
-	  };
+	            var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-	  combobox.data = function (val) {
-	    if (!arguments.length) return _data;
-	    _data = val;
-	    return combobox;
-	  };
+	            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;
+	                    }
+	                  }
+	                });
+	              });
 
-	  combobox.fetcher = function (val) {
-	    if (!arguments.length) return _fetcher;
-	    _fetcher = val;
-	    return combobox;
-	  };
+	              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
 
-	  combobox.minItems = function (val) {
-	    if (!arguments.length) return _minItems;
-	    _minItems = val;
-	    return combobox;
-	  };
 
-	  combobox.itemsMouseEnter = function (val) {
-	    if (!arguments.length) return _mouseEnterHandler;
-	    _mouseEnterHandler = val;
-	    return combobox;
-	  };
+	            if (!newNode) newNode = endNode;
+	            var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+	            // do the split
 
-	  combobox.itemsMouseLeave = function (val) {
-	    if (!arguments.length) return _mouseLeaveHandler;
-	    _mouseLeaveHandler = val;
-	    return combobox;
-	  };
+	            graph = splitAction(graph);
 
-	  return utilRebind(combobox, dispatch$1, 'on');
-	}
+	            if (splitAction.getCreatedWayIDs().length) {
+	              resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+	            }
 
-	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);
-	};
+	            return newNode;
+	          }
 
-	// 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.
+	          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
 
-	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);
-	    });
-	  };
-	}
+	          if (bridgeOrTunnel === 'bridge') {
+	            tags.bridge = 'yes';
+	            tags.layer = '1';
+	          } else {
+	            var tunnelValue = 'yes';
 
-	function uiDisclosure(context, key, expandedDefault) {
-	  var dispatch$1 = dispatch('toggled');
+	            if (getFeatureType(structureWay, graph) === 'waterway') {
+	              // use `tunnel=culvert` for waterways by default
+	              tunnelValue = 'culvert';
+	            }
 
-	  var _expanded;
+	            tags.tunnel = tunnelValue;
+	            tags.layer = '-1';
+	          } // apply the structure tags to the way
 
-	  var _label = utilFunctor('');
 
-	  var _updatePreference = true;
+	          graph = actionChangeTags(structureWay.id, tags)(graph);
+	          return graph;
+	        };
 
-	  var _content = function _content() {};
+	        context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+	        context.enter(modeSelect(context, resultWayIDs));
+	      }
+	    });
+	  }
 
-	  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';
-	    }
+	  function makeConnectWaysFix(connectionTags) {
+	    var fixTitleID = 'connect_features';
 
-	    var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
+	    if (connectionTags.ford) {
+	      fixTitleID = 'connect_using_ford';
+	    }
 
-	    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
+	    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
 
-	    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
+	            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);
+	            }
+	          });
 
-	    wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
+	          if (nodesToMerge.length > 1) {
+	            // if we're using nearby nodes, merge them with the new node
+	            graph = actionMergeNodes(nodesToMerge, loc)(graph);
+	          }
 
-	    if (_expanded) {
-	      wrap.call(_content);
-	    }
+	          return graph;
+	        }, _t('issues.fix.connect_crossing_features.annotation'));
+	      }
+	    });
+	  }
 
-	    function toggle(d3_event) {
-	      d3_event.preventDefault();
-	      _expanded = !_expanded;
+	  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
 
-	      if (_updatePreference) {
-	        corePreferences('disclosure.' + key + '.expanded', _expanded);
-	      }
+	        var layer = tags.layer && Number(tags.layer);
 
-	      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));
+	        if (layer && !isNaN(layer)) {
+	          if (higherOrLower === 'higher') {
+	            layer += 1;
+	          } else {
+	            layer -= 1;
+	          }
+	        } else {
+	          if (higherOrLower === 'higher') {
+	            layer = 1;
+	          } else {
+	            layer = -1;
+	          }
+	        }
 
-	      if (_expanded) {
-	        wrap.call(_content);
+	        tags.layer = layer.toString();
+	        context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
 	      }
+	    });
+	  }
 
-	      dispatch$1.call('toggled', this, _expanded);
-	    }
-	  };
+	  validation.type = type;
+	  return validation;
+	}
 
-	  disclosure.label = function (val) {
-	    if (!arguments.length) return _label;
-	    _label = utilFunctor(val);
-	    return disclosure;
-	  };
+	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.
 
-	  disclosure.expanded = function (val) {
-	    if (!arguments.length) return _expanded;
-	    _expanded = val;
-	    return disclosure;
-	  };
+	  var _nodeIndex;
 
-	  disclosure.updatePreference = function (val) {
-	    if (!arguments.length) return _updatePreference;
-	    _updatePreference = val;
-	    return disclosure;
-	  };
+	  var _origWay;
 
-	  disclosure.content = function (val) {
-	    if (!arguments.length) return _content;
-	    _content = val;
-	    return disclosure;
-	  };
+	  var _wayGeometry;
 
-	  return utilRebind(disclosure, dispatch$1, 'on');
-	}
+	  var _headNodeID;
 
-	// Can be labeled and collapsible.
+	  var _annotation;
 
-	function uiSection(id, context) {
-	  var _classes = utilFunctor('');
+	  var _pointerHasMoved = false; // The osmNode to be placed.
+	  // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-	  var _shouldDisplay;
+	  var _drawNode;
 
-	  var _content;
+	  var _didResolveTempEdit = false;
 
-	  var _disclosure;
+	  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();
+	  }
 
-	  var _label;
+	  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();
+	  }
 
-	  var _expandedByDefault = utilFunctor(true);
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	  var _disclosureContent;
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
-	  var _disclosureExpanded;
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	  var _containerSelection = select(null);
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
-	  var section = {
-	    id: id
-	  };
+	  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()`
 
-	  section.classes = function (val) {
-	    if (!arguments.length) return _classes;
-	    _classes = utilFunctor(val);
-	    return section;
-	  };
 
-	  section.label = function (val) {
-	    if (!arguments.length) return _label;
-	    _label = utilFunctor(val);
-	    return section;
-	  };
+	  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;
 
-	  section.expandedByDefault = function (val) {
-	    if (!arguments.length) return _expandedByDefault;
-	    _expandedByDefault = utilFunctor(val);
-	    return section;
-	  };
+	    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);
 
-	  section.shouldDisplay = function (val) {
-	    if (!arguments.length) return _shouldDisplay;
-	    _shouldDisplay = utilFunctor(val);
-	    return section;
-	  };
+	      if (choice) {
+	        loc = choice.loc;
+	      }
+	    }
 
-	  section.content = function (val) {
-	    if (!arguments.length) return _content;
-	    _content = val;
-	    return section;
-	  };
+	    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
 
-	  section.disclosureContent = function (val) {
-	    if (!arguments.length) return _disclosureContent;
-	    _disclosureContent = val;
-	    return section;
-	  };
 
-	  section.disclosureExpanded = function (val) {
-	    if (!arguments.length) return _disclosureExpanded;
-	    _disclosureExpanded = val;
-	    return section;
-	  }; // may be called multiple times
+	  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);
+	    }
+	  }
 
-	  section.render = function (selection) {
-	    _containerSelection = selection.selectAll('.section-' + id).data([0]);
+	  function isInvalidGeometry(includeDrawNode) {
+	    var testNode = _drawNode; // we only need to test the single way we're drawing
 
-	    var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+	    var parentWay = context.graph().entity(wayID);
+	    var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
-	    _containerSelection = sectionEnter.merge(_containerSelection);
+	    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;
+	      }
+	    }
 
-	    _containerSelection.call(renderContent);
-	  };
+	    return testNode && geoHasSelfIntersections(nodes, testNode.id);
+	  }
 
-	  section.reRender = function () {
-	    _containerSelection.call(renderContent);
-	  };
+	  function undone() {
+	    // undoing removed the temp edit
+	    _didResolveTempEdit = true;
+	    context.pauseChangeDispatch();
+	    var nextMode;
 
-	  section.selection = function () {
-	    return _containerSelection;
-	  };
+	    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
 
-	  section.disclosure = function () {
-	    return _disclosure;
-	  }; // may be called multiple times
+	      nextMode = mode;
+	    } // clear the redo stack by adding and removing a blank edit
 
 
-	  function renderContent(selection) {
-	    if (_shouldDisplay) {
-	      var shouldDisplay = _shouldDisplay();
+	    context.perform(actionNoop());
+	    context.pop(1);
+	    context.resumeChangeDispatch();
+	    context.enter(nextMode);
+	  }
 
-	      selection.classed('hide', !shouldDisplay);
+	  function setActiveElements() {
+	    if (!_drawNode) return;
+	    context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+	  }
 
-	      if (!shouldDisplay) {
-	        selection.html('');
-	        return;
-	      }
+	  function resetToStartGraph() {
+	    while (context.graph() !== startGraph) {
+	      context.pop();
 	    }
+	  }
 
-	    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);
-	      }
+	  var drawWay = function drawWay(surface) {
+	    _drawNode = undefined;
+	    _didResolveTempEdit = false;
+	    _origWay = context.entity(wayID);
 
-	      if (_disclosureExpanded !== undefined) {
-	        _disclosure.expanded(_disclosureExpanded);
+	    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];
+	    }
 
-	        _disclosureExpanded = undefined;
-	      }
+	    _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.
 
-	      selection.call(_disclosure);
-	      return;
-	    }
+	    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);
+	  };
 
-	    if (_content) {
-	      selection.call(_content);
+	  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();
 	    }
-	  }
 
-	  return section;
-	}
+	    _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);
+	  };
 
-	// {
-	//   key: 'string',     // required
-	//   value: 'string'    // optional
-	// }
-	//   -or-
-	// {
-	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	// }
-	//
+	  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);
+	    }
 
-	function uiTagReference(what) {
-	  var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-	  var tagReference = {};
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
 
-	  var _button = select(null);
+	    if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+	      if (!_pointerHasMoved) {
+	        // prevent the temporary draw node from appearing on touch devices
+	        removeDrawNode();
+	      }
 
-	  var _body = select(null);
+	      dispatch.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
-	  var _loaded;
+	    context.pauseChangeDispatch();
+	    doAdd(); // we just replaced the temporary edit with the real one
 
-	  var _showing;
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    context.enter(mode);
+	  } // Accept the current position of the drawing node
 
-	  function load() {
-	    if (!wikibase) return;
 
-	    _button.classed('tag-reference-loading', true);
+	  drawWay.add = function (loc, d) {
+	    attemptAdd(d, loc, function () {// don't need to do anything extra
+	    });
+	  }; // Connect the way to an existing way
 
-	    wikibase.getDocs(what, gotDocs);
-	  }
 
-	  function gotDocs(err, docs) {
-	    _body.html('');
+	  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
 
-	    if (!docs || !docs.title) {
-	      _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
 
-	      done();
+	  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;
 	    }
 
-	    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();
-	    }
+	    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"}
+	   */
 
-	    _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'));
 
-	    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 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 */
 
 
-	    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 followMode() {
+	    if (_didResolveTempEdit) return;
 
-	  function done() {
-	    _loaded = true;
+	    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];
 
-	    _button.classed('tag-reference-loading', false);
+	      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
 
-	    _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-	    _showing = true;
+	      var historyGraph = context.history().graph();
 
-	    _button.selectAll('svg.icon use').each(function () {
-	      var iconUse = select(this);
+	      if (!lastNodeId || !secondLastNodeId || !historyGraph.hasEntity(lastNodeId) || !historyGraph.hasEntity(secondLastNodeId)) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.follow.error.needs_more_initial_nodes'))();
+	        return;
+	      } // If the way has looped over itself, follow some other way.
 
-	      if (iconUse.attr('href') === '#iD-icon-info') {
-	        iconUse.attr('href', '#iD-icon-info-filled');
-	      }
-	    });
-	  }
 
-	  function hide() {
-	    _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
-	      _body.classed('expanded', false);
-	    });
+	      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);
 
-	    _showing = false;
+	      if (lastNodesParents.length !== 1 || secondLastNodesParents.length === 0) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html("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.
 
-	    _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');
+	      if (!secondLastNodesParents.some(function (n) {
+	        return n.id === lastNodesParents[0].id;
+	      })) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html("operations.follow.error.intersection_of_different_ways.".concat(featureType)))();
+	        return;
 	      }
-	    });
-	  }
 
-	  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);
+	      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
 
-	    _button.on('click', function (d3_event) {
-	      d3_event.stopPropagation();
-	      d3_event.preventDefault();
-	      this.blur(); // avoid keeping focus on the button - #4641
+	      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
 
-	      if (_showing) {
-	        hide();
-	      } else if (_loaded) {
-	        done();
-	      } else {
-	        load();
-	      }
-	    });
-	  };
+	      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.html('operations.follow.error.unknown'))();
+	    }
+	  }
 
-	  tagReference.body = function (selection) {
-	    var itemID = what.qid || what.key + '-' + (what.value || '');
-	    _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
-	      return d;
-	    });
+	  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.
 
-	    _body.exit().remove();
+	  drawWay.finish = function () {
+	    checkGeometry(false
+	    /* includeDrawNode */
+	    );
 
-	    _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
+	    if (context.surface().classed('nope')) {
+	      dispatch.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
-	    if (_showing === false) {
-	      hide();
+	    context.pauseChangeDispatch(); // remove the temporary edit
+
+	    context.pop(1);
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    var way = context.hasEntity(wayID);
+
+	    if (!way || way.isDegenerate()) {
+	      drawWay.cancel();
+	      return;
 	    }
+
+	    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.
+
+
+	  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));
 	  };
 
-	  tagReference.showing = function (val) {
-	    if (!arguments.length) return _showing;
-	    _showing = val;
-	    return tagReference;
+	  drawWay.nodeIndex = function (val) {
+	    if (!arguments.length) return _nodeIndex;
+	    _nodeIndex = val;
+	    return drawWay;
 	  };
 
-	  return tagReference;
+	  drawWay.activeID = function () {
+	    if (!arguments.length) return _drawNode && _drawNode.id; // no assign
+
+	    return drawWay;
+	  };
+
+	  return utilRebind(drawWay, dispatch, 'on');
 	}
 
-	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$1 = dispatch('change');
-	  var availableViews = [{
-	    id: 'list',
-	    icon: '#fas-th-list'
-	  }, {
-	    id: 'text',
-	    icon: '#fas-i-cursor'
-	  }];
+	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.html('self_intersection.error.lines'))();
+	  });
+	  mode.wayID = wayID;
+	  mode.isContinuing = continuing;
 
-	  var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
+	  mode.enter = function () {
+	    behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+	    context.install(behavior);
+	  };
 
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	  var _readOnlyTags = []; // the keys in the order we want them to display
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	  var _orderedKeys = [];
-	  var _showBlank = false;
-	  var _pendingChange = null;
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	  var _state;
+	  return mode;
+	}
 
-	  var _presets;
+	function validationDisconnectedWay() {
+	  var type = 'disconnected_way';
 
-	  var _tags;
+	  function isTaggedAsHighway(entity) {
+	    return osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	  var _entityIDs;
+	  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 _didInteract = false;
+	    function makeFixes(context) {
+	      var fixes = [];
+	      var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-	  function interacted() {
-	    _didInteract = true;
-	  }
+	      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);
+	        }
 
-	  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
+	        if (!fixes.length) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.connect_feature.title')
+	          }));
+	        }
 
-	    var all = Object.keys(_tags).sort();
-	    var missingKeys = utilArrayDifference(all, _orderedKeys);
+	        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]);
 
-	    for (var i in missingKeys) {
-	      _orderedKeys.push(missingKeys[i]);
-	    } // assemble row data
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          }
+	        }));
+	      } else {
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_features.title')
+	        }));
+	      }
 
+	      return fixes;
+	    }
 
-	    var rowData = _orderedKeys.map(function (key, i) {
-	      return {
-	        index: i,
-	        key: key,
-	        value: _tags[key]
-	      };
-	    }); // append blank row last, if necessary
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.disconnected_way.routable.reference'));
+	    }
 
+	    function routingIslandForEntity(entity) {
+	      var routingIsland = new Set(); // the interconnected routable features
 
-	    if (!rowData.length || _showBlank) {
-	      _showBlank = false;
-	      rowData.push({
-	        index: rowData.length,
-	        key: '',
-	        value: ''
-	      });
-	    } // View Options
+	      var waysToCheck = []; // the queue of remaining routable ways to traverse
 
+	      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);
+	          }
+	        });
+	      }
 
-	    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
+	      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;
+	      }
 
-	    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
+	      while (waysToCheck.length) {
+	        var wayToCheck = waysToCheck.pop();
+	        var childNodes = graph.childNodes(wayToCheck);
 
-	    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
+	        for (var i in childNodes) {
+	          var vertex = childNodes[i];
 
-	    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
+	          if (isConnectedVertex(vertex)) {
+	            // found a link to the wider network, not a routing island
+	            return null;
+	          }
 
-	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-	    // Tag list items
+	          if (isRoutableNode(vertex)) {
+	            routingIsland.add(vertex);
+	          }
 
-	    var items = list.selectAll('.tag-row').data(rowData, function (d) {
-	      return d.key;
-	    });
-	    items.exit().each(unbind).remove(); // Enter
+	          queueParentWays(vertex);
+	        }
+	      } // no network link found, this is a routing island, return its members
 
-	    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
 
-	    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
+	      return routingIsland;
+	    }
 
-	      var value = row.select('input.value'); // propagate bound data
+	    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 (_entityIDs && taginfo && _state !== 'hover') {
-	        bindTypeahead(key, value);
-	      }
+	      if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+	      if (vertex.tags.amenity === 'parking_entrance') return true;
+	      return false;
+	    }
 
-	      var referenceOptions = {
-	        key: d.key
-	      };
+	    function isRoutableNode(node) {
+	      // treat elevators as distinct features in the highway network
+	      if (node.tags.highway === 'elevator') return true;
+	      return false;
+	    }
 
-	      if (typeof d.value === 'string') {
-	        referenceOptions.value = d.value;
-	      }
+	    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;
+	      });
+	    }
 
-	      var reference = uiTagReference(referenceOptions);
+	    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
 
-	      if (_state === 'hover') {
-	        reference.showing(false);
-	      }
+	          var map = context.map();
 
-	      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
-	  }
+	          if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	            map.zoomToEase(vertex);
+	          }
 
-	  function isReadOnly(d) {
-	    for (var i = 0; i < _readOnlyTags.length; i++) {
-	      if (d.key.match(_readOnlyTags[i]) !== null) {
-	        return true;
-	      }
+	          context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+	        }
+	      });
 	    }
+	  };
 
-	    return false;
-	  }
+	  validation.type = type;
+	  return validation;
+	}
 
-	  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');
-	  }
+	function validationFormatting() {
+	  var type = 'invalid_format';
 
-	  function stringify(s) {
-	    return JSON.stringify(s).slice(1, -1); // without leading/trailing "
-	  }
+	  var validation = function validation(entity) {
+	    var issues = [];
 
-	  function unstringify(s) {
-	    var leading = '';
-	    var trailing = '';
+	    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
 
-	    if (s.length < 1 || s.charAt(0) !== '"') {
-	      leading = '"';
+	      return !email || valid_email.test(email);
 	    }
 
-	    if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
-	      trailing = '"';
+	    function showReferenceEmail(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.invalid_format.email.reference'));
+	    }
+	    /* see https://github.com/openstreetmap/iD/issues/6831#issuecomment-537121379
+	    function isSchemePresent(url) {
+	        var valid_scheme = /^https?:\/\//i;
+	        return (!url || valid_scheme.test(url));
+	    }
+	    function showReferenceWebsite(selection) {
+	        selection.selectAll('.issue-reference')
+	            .data([0])
+	            .enter()
+	            .append('div')
+	            .attr('class', 'issue-reference')
+	            .call(t.append('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' : ''
+	            }));
+	        }
+	    }*/
 
-	    return JSON.parse(leading + s + trailing);
-	  }
 
-	  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');
+	    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 (_state !== 'hover' && str.length) {
-	      return str + '\n';
+	      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 str;
-	  }
+	    return issues;
+	  };
 
-	  function textChanged() {
-	    var newText = this.value.trim();
-	    var newTags = {};
-	    newText.split('\n').forEach(function (row) {
-	      var m = row.match(/^\s*([^=]+)=(.*)$/);
+	  validation.type = type;
+	  return validation;
+	}
 
-	      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
+	function validationHelpRequest(context) {
+	  var type = 'help_request';
 
-	      if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+	  var validation = function checkFixmeTag(entity) {
+	    if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-	      if (change.type === '-') {
-	        _pendingChange[change.key] = undefined;
-	      } else if (change.type === '+') {
-	        _pendingChange[change.key] = change.newVal || '';
-	      }
-	    });
+	    if (entity.version === undefined) return [];
 
-	    if (Object.keys(_pendingChange).length === 0) {
-	      _pendingChange = null;
-	      return;
+	    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 [];
 	    }
 
-	    scheduleChange();
-	  }
+	    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 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();
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.fixme_tag.reference'));
 	    }
-	  }
+	  };
 
-	  function bindTypeahead(key, value) {
-	    if (isReadOnly(key.datum())) return;
+	  validation.type = type;
+	  return validation;
+	}
 
-	    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;
+	function validationImpossibleOneway() {
+	  var type = 'impossible_oneway';
 
-	        var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
-	          return {
-	            value: tagValue,
-	            title: tagValue
-	          };
-	        });
+	  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);
 
-	        callback(data);
-	      }));
-	      return;
+	    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;
 	    }
 
-	    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));
+	    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;
 	        }
-	      });
-	    }));
-	    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));
-	      });
-	    }));
+	      }
 
-	    function sort(value, data) {
-	      var sameletter = [];
-	      var other = [];
+	      return false;
+	    }
 
-	      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]);
+	    function nodeOccursMoreThanOnce(way, nodeID) {
+	      var occurrences = 0;
+
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === nodeID) {
+	          occurrences += 1;
+	          if (occurrences > 1) return true;
 	        }
 	      }
 
-	      return sameletter.concat(other);
+	      return false;
 	    }
-	  }
 
-	  function unbind() {
-	    var row = select(this);
-	    row.selectAll('input.key').call(uiCombobox.off, context);
-	    row.selectAll('input.value').call(uiCombobox.off, context);
-	  }
+	    function isConnectedViaOtherTypes(way, node) {
+	      var wayType = typeForWay(way);
 
-	  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
+	      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;
+	        }
+	      }
 
-	    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
+	      return graph.parentWays(node).some(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
 
-	    if (isReadOnly({
-	      key: kNew
-	    })) {
-	      this.value = kOld;
-	      return;
-	    }
+	        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
 
-	    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
+	          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
 
-	      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 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;
 	      });
-	      return;
 	    }
 
-	    var row = this.parentNode.parentNode;
-	    var inputVal = select(row).selectAll('input.value');
-	    var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
-	    _pendingChange = _pendingChange || {};
-
-	    if (kOld) {
-	      _pendingChange[kOld] = undefined;
-	    }
+	    function issuesForNode(way, nodeID) {
+	      var isFirst = nodeID === way.first();
+	      var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-	    _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
+	      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
 
-	    var existingKeyIndex = _orderedKeys.indexOf(kOld);
+	      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 (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
-	    d.key = kNew; // update datum to avoid exit/enter on tag update
+	      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
 
-	    d.value = vNew;
-	    this.value = kNew;
-	    utilGetSetValue(inputVal, vNew);
-	    scheduleChange();
-	  }
+	      if (attachedOneways.length < attachedWaysOfSameType.length) return [];
 
-	  function valueChange(d3_event, d) {
-	    if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
+	      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 (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
+	      var placement = isFirst ? 'start' : 'end',
+	          messageID = wayType + '.',
+	          referenceID = wayType + '.';
 
-	    if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
-	    _pendingChange = _pendingChange || {};
-	    _pendingChange[d.key] = context.cleanTagValue(this.value);
-	    scheduleChange();
-	  }
+	      if (wayType === 'waterway') {
+	        messageID += 'connected.' + placement;
+	        referenceID += 'connected';
+	      } else {
+	        messageID += placement;
+	        referenceID += placement;
+	      }
 
-	  function removeTag(d3_event, d) {
-	    if (isReadOnly(d)) return;
+	      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 = [];
 
-	    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();
-	    }
-	  }
+	          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
+	                }));
+	              }
+	            }));
+	          }
 
-	  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);
-	  }
+	          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);
+	              }
+	            }));
+	          }
 
-	  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
+	          return fixes;
+	        },
+	        loc: node.loc
+	      })];
 
-	    window.setTimeout(function () {
-	      if (!_pendingChange) return;
-	      dispatch$1.call('change', this, entityIDs, _pendingChange);
-	      _pendingChange = null;
-	    }, 10);
-	  }
+	      function getReference(referenceID) {
+	        return function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.impossible_oneway.' + referenceID + '.reference'));
+	        };
+	      }
+	    }
+	  };
 
-	  section.state = function (val) {
-	    if (!arguments.length) return _state;
+	  function continueDrawing(way, vertex, context) {
+	    // make sure the vertex is actually visible and editable
+	    var map = context.map();
 
-	    if (_state !== val) {
-	      _orderedKeys = [];
-	      _state = val;
+	    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	      map.zoomToEase(vertex);
 	    }
 
-	    return section;
-	  };
+	    context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+	  }
 
-	  section.presets = function (val) {
-	    if (!arguments.length) return _presets;
-	    _presets = val;
+	  validation.type = type;
+	  return validation;
+	}
 
-	    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);
-	    }
+	function validationIncompatibleSource() {
+	  var type = 'incompatible_source';
+	  var incompatibleRules = [{
+	    id: 'amap',
+	    regex: /(^amap$|^amap\.com|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))|(esri\/Google_Africa_Buildings)/i
+	  }];
 
-	    return section;
-	  };
+	  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);
 
-	  section.tags = function (val) {
-	    if (!arguments.length) return _tags;
-	    _tags = val;
-	    return section;
+	    function getReference(id) {
+	      return function showReference(selection) {
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append("issues.incompatible_source.reference.".concat(id)));
+	      };
+	    }
 	  };
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
+	  validation.type = type;
+	  return validation;
+	}
 
-	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	      _entityIDs = val;
-	      _orderedKeys = [];
-	    }
+	function validationMaprules() {
+	  var type = 'maprules';
 
-	    return section;
-	  }; // pass an array of regular expressions to test against the tag key
+	  var validation = function checkMaprules(entity, graph) {
+	    if (!services.maprules) return [];
+	    var rules = services.maprules.validationRules();
+	    var issues = [];
 
+	    for (var i = 0; i < rules.length; i++) {
+	      var rule = rules[i];
+	      rule.findIssues(entity, graph, issues);
+	    }
 
-	  section.readOnlyTags = function (val) {
-	    if (!arguments.length) return _readOnlyTags;
-	    _readOnlyTags = val;
-	    return section;
+	    return issues;
 	  };
 
-	  return utilRebind(section, dispatch$1, 'on');
+	  validation.type = type;
+	  return validation;
 	}
 
-	function uiDataEditor(context) {
-	  var dataHeader = uiDataHeader();
-	  var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
-
-	  var _datum;
+	function validationMismatchedGeometry() {
+	  var type = 'mismatched_geometry';
 
-	  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
+	  function tagSuggestingLineIsArea(entity) {
+	    if (entity.type !== 'way' || entity.isClosed()) return null;
+	    var tagSuggestingArea = entity.tagSuggestingArea();
 
-	    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
+	    if (!tagSuggestingArea) {
+	      return null;
+	    }
 
-	    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 asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+	    var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-	  dataEditor.datum = function (val) {
-	    if (!arguments.length) return _datum;
-	    _datum = val;
-	    return this;
-	  };
+	    if (asLine && asArea && asLine === asArea) {
+	      // these tags also allow lines and making this an area wouldn't matter
+	      return null;
+	    }
 
-	  return dataEditor;
-	}
+	    return tagSuggestingArea;
+	  }
 
-	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
+	  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
 
-	  function selectData(d3_event, drawn) {
-	    var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
+	    if (firstToLastDistanceMeters < 0.75) {
+	      testNodes = nodes.slice(); // shallow copy
 
-	    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;
+	      testNodes.pop();
+	      testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	        context.enter(modeBrowse(context));
+	      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'));
+	        };
 	      }
-	    } else {
-	      selection.classed('selected', true);
-	    }
-	  }
+	    } // if the points were not merged, attempt to close the way
 
-	  function esc() {
-	    if (context.container().select('.combobox').size()) return;
-	    context.enter(modeBrowse(context));
-	  }
 
-	  mode.zoomToSelected = function () {
-	    var extent = geoExtent(d3_geoBounds(selectedDatum));
-	    context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-	  };
+	    testNodes = nodes.slice(); // shallow copy
 
-	  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
+	    testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	    var extent = geoExtent(d3_geoBounds(selectedDatum));
-	    sidebar.expand(sidebar.intersects(extent));
-	    context.map().on('drawn.select-data', selectData);
-	  };
+	    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'));
+	      };
+	    }
+	  }
 
-	  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 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
 
-	  return mode;
-	}
+	            for (var key in tagSuggestingArea) {
+	              delete tags[key];
+	            }
 
-	function uiImproveOsmComments() {
-	  var _qaItem;
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+	          }
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	  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
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.tag_suggests_area.reference'));
+	    }
+	  }
 
-	    services.improveOSM.getComments(_qaItem).then(function (d) {
-	      if (!d.comments) return; // nothing to do here
+	  function vertexPointIssue(entity, graph) {
+	    // we only care about nodes
+	    if (entity.type !== 'node') return null; // ignore tagless points
 
-	      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 (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-	        if (osm && d.username) {
-	          selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
-	        }
+	    if (entity.isOnAddressLine(graph)) return null;
+	    var geometry = entity.geometry(graph);
+	    var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-	        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)
-	        });
+	    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').call(_t.append('issues.vertex_as_point.reference'));
+	        },
+	        entityIds: [entity.id]
 	      });
-	      mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
-	        return d.text;
+	    } 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').call(_t.append('issues.point_as_vertex.reference'));
+	        },
+	        entityIds: [entity.id],
+	        dynamicFixes: extractPointDynamicFixes
 	      });
-	    })["catch"](function (err) {
-	      console.log(err); // eslint-disable-line no-console
-	    });
+	    }
+
+	    return null;
 	  }
 
-	  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
+	  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;
+
+	    if (targetGeom === 'point') {
+	      dynamicFixes = extractPointDynamicFixes;
+	    } else if (sourceGeom === 'area' && targetGeom === 'line') {
+	      dynamicFixes = lineToAreaDynamicFixes;
+	    }
 
-	    if (isNaN(d.getTime())) return null;
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	    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').call(_t.append('issues.mismatched_geometry.reference'));
+	      },
+	      entityIds: [entity.id],
+	      dynamicFixes: dynamicFixes
+	    });
 	  }
 
-	  issueComments.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return issueComments;
-	  };
-
-	  return issueComments;
-	}
+	  function lineToAreaDynamicFixes(context) {
+	    var convertOnClick;
+	    var entityId = this.entityIds[0];
+	    var entity = context.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
 
-	function uiImproveOsmDetails(context) {
-	  var _qaItem;
+	    delete tags.area;
 
-	  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
+	    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
 
-	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
-	  }
+	        if (tags.area) {
+	          delete tags.area;
+	        }
 
-	  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
+	        context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+	      };
+	    }
 
-	    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..
+	    return [new validationIssueFix({
+	      icon: 'iD-icon-line',
+	      title: _t.html('issues.fix.convert_to_line.title'),
+	      onClick: convertOnClick
+	    })];
+	  }
 
-	    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
+	  function extractPointDynamicFixes(context) {
+	    var entityId = this.entityIds[0];
+	    var extractOnClick = null;
 
-	      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 (!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
 
-	        if (!osmlayer.enabled()) {
-	          osmlayer.enabled(true);
-	        }
+	        context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+	      };
+	    }
 
-	        context.map().centerZoom(_qaItem.loc, 20);
+	    return [new validationIssueFix({
+	      icon: 'iD-operation-extract',
+	      title: _t.html('issues.fix.extract_point.title'),
+	      onClick: extractOnClick
+	    })];
+	  }
 
-	        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)
+	  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 = [];
 
-	      if (entity) {
-	        var name = utilDisplayName(entity); // try to use common name
+	    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 (!name && !isObjectLink) {
-	          var preset = _mainPresetIndex.match(entity, context.graph());
-	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-	        }
+	      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);
+	    }
 
-	        if (name) {
-	          this.innerText = name;
-	        }
-	      }
-	    }); // Don't hide entities related to this error - #5880
+	    return issues;
 
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0, 0]); // trigger a redraw
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unclosed_multipolygon_part.reference'));
+	    }
 	  }
 
-	  improveOsmDetails.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return improveOsmDetails;
+	  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);
 	  };
 
-	  return improveOsmDetails;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function uiImproveOsmHeader() {
-	  var _qaItem;
+	function validationMissingRole() {
+	  var type = 'missing_role';
 
-	  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
+	  var validation = function checkMissingRole(entity, graph) {
+	    var issues = [];
 
-	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+	    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 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);
+	  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
+	            }));
+	          }
+	        })];
+	      }
 	    });
-	    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' : '');
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.missing_role.multipolygon.reference'));
+	    }
+	  }
+
+	  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
+	        }));
 	      }
 	    });
-	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
 	  }
 
-	  improveOsmHeader.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return improveOsmHeader;
-	  };
-
-	  return improveOsmHeader;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function uiImproveOsmEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiImproveOsmDetails(context);
-	  var qaComments = uiImproveOsmComments();
-	  var qaHeader = uiImproveOsmHeader();
+	function validationMissingTag(context) {
+	  var type = 'missing_tag';
 
-	  var _qaItem;
+	  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;
+	      });
+	    });
 
-	  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);
+	    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);
+	    }
+
+	    return entityDescriptiveKeys.length > 0;
+	  }
+
+	  function isUnknownRoad(entity) {
+	    return entity.type === 'way' && entity.tags.highway === 'road';
+	  }
+
+	  function isUntypedRelation(entity) {
+	    return entity.type === 'relation' && !entity.tags.type;
 	  }
 
-	  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 "".concat(d.id, "-").concat(d.status || 0);
-	    }); // exit
+	  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
 
-	    saveSection.exit().remove(); // enter
+	    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
 
-	    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
 
-	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+	    if (!subtype && isUnknownRoad(entity)) {
+	      subtype = 'highway_classification';
+	    }
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	    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..
 
-	      if (val === '') {
-	        val = undefined;
-	      } // store the unsaved comment with the issue itself
+	    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]);
 
-	      _qaItem = _qaItem.update({
-	        newComment: val
-	      });
-	      var qaService = services.improveOSM;
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          };
+	        }
 
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);
+	        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;
 	      }
+	    })];
 
-	      saveSection.call(qaSaveButtons);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.' + referenceID + '.reference'));
 	    }
-	  }
+	  };
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+	  validation.type = type;
+	  return validation;
+	}
 
-	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-	      return d.status + d.id;
-	    }); // exit
+	function validationOutdatedTags() {
+	  var type = 'outdated_tags';
+	  var _waitingForDeprecated = true;
 
-	    buttonSection.exit().remove(); // enter
+	  var _dataDeprecated; // fetch deprecated tags
 
-	    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
 
-	    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
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    return _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  })["finally"](function () {
+	    return _waitingForDeprecated = false;
+	  });
 
-	      var qaService = services.improveOSM;
+	  function oldTagIssues(entity, graph) {
+	    var oldTags = Object.assign({}, entity.tags); // shallow copy
 
-	      if (qaService) {
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.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
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    var subtype = 'deprecated_tags';
+	    if (!preset) return [];
+	    if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..
 
-	      var qaService = services.improveOSM;
+	    if (preset.replacement) {
+	      var newPreset = _mainPresetIndex.item(preset.replacement);
+	      graph = actionChangePreset(entity.id, preset, newPreset, true
+	      /* skip field defaults */
+	      )(graph);
+	      entity = graph.entity(entity.id);
+	      preset = newPreset;
+	    } // Upgrade deprecated tags..
 
-	      if (qaService) {
-	        d.newStatus = 'SOLVED';
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.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 (_dataDeprecated) {
+	      var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
 
-	      if (qaService) {
-	        d.newStatus = 'INVALID';
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.call('change', item);
+	      if (deprecatedTags.length) {
+	        deprecatedTags.forEach(function (tag) {
+	          graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
 	        });
+	        entity = graph.entity(entity.id);
 	      }
-	    });
-	  } // NOTE: Don't change method name until UI v3 is merged
+	    } // Add missing addTags from the detected preset
 
 
-	  improveOsmEditor.error = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return improveOsmEditor;
-	  };
+	    var newTags = Object.assign({}, entity.tags); // shallow copy
 
-	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
-	}
+	    if (preset.tags !== preset.addTags) {
+	      Object.keys(preset.addTags).forEach(function (k) {
+	        if (!newTags[k]) {
+	          if (preset.addTags[k] === '*') {
+	            newTags[k] = 'yes';
+	          } else {
+	            newTags[k] = preset.addTags[k];
+	          }
+	        }
+	      });
+	    } // Attempt to match a canonical record in the name-suggestion-index.
 
-	function uiKeepRightDetails(context) {
-	  var _qaItem;
 
-	  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 nsi = services.nsi;
+	    var waitingForNsi = false;
+	    var nsiResult;
 
-	    var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
+	    if (nsi) {
+	      waitingForNsi = nsi.status() === 'loading';
 
-	    if (detail === unknown) {
-	      detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+	      if (!waitingForNsi) {
+	        var loc = entity.extent(graph).center();
+	        nsiResult = nsi.upgradeTags(newTags, loc);
+
+	        if (nsiResult) {
+	          newTags = nsiResult.newTags;
+	          subtype = 'noncanonical_brand';
+	        }
+	      }
 	    }
 
-	    return detail;
-	  }
+	    var issues = [];
+	    issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff
 
-	  function keepRightDetails(selection) {
-	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
-	      return "".concat(d.id, "-").concat(d.status || 0);
+	    var tagDiff = utilTagDiff(oldTags, newTags);
+	    if (!tagDiff.length) return issues;
+	    var isOnlyAddingTags = tagDiff.every(function (d) {
+	      return d.type === '+';
 	    });
-	    details.exit().remove();
-	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
+	    var prefix = '';
 
-	    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..
+	    if (nsiResult) {
+	      prefix = 'noncanonical_brand.';
+	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
+	      subtype = 'incomplete_tags';
+	      prefix = 'incomplete.';
+	    } // don't allow autofixing brand tags
 
-	    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
 
-	      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');
+	    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: 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 (!osmlayer.enabled()) {
-	          osmlayer.enabled(true);
+	        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'));
+	            }
+	          }));
 	        }
 
-	        context.map().centerZoomEase(_qaItem.loc, 20);
+	        return fixes;
+	      }
+	    }));
+	    return issues;
 
-	        if (entity) {
-	          context.enter(modeSelect(context, [entityID]));
-	        } else {
-	          context.loadEntity(entityID, function () {
-	            context.enter(modeSelect(context, [entityID]));
-	          });
+	    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;
 	        }
-	      }); // Replace with friendly name if possible
-	      // (The entity may not yet be loaded into the graph)
+	      });
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
-	      if (entity) {
-	        var name = utilDisplayName(entity); // try to use common name
+	    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
 
-	        if (!name && !isObjectLink) {
-	          var preset = _mainPresetIndex.match(entity, context.graph());
-	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-	        }
+	      var wd = item.mainTag; // e.g. `brand:wikidata`
 
-	        if (name) {
-	          this.innerText = name;
-	        }
-	      }
-	    }); // Don't hide entities related to this issue - #5880
+	      var notwd = "not:".concat(wd); // e.g. `not:brand:wikidata`
 
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0, 0]); // trigger a redraw
-	  }
+	      var qid = item.tags[wd];
+	      newTags[notwd] = qid;
 
-	  keepRightDetails.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return keepRightDetails;
-	  };
+	      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`
 
-	  return keepRightDetails;
-	}
+	        delete newTags[wp]; // remove `brand:wikipedia`
+	      }
 
-	function uiKeepRightHeader() {
-	  var _qaItem;
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
-	  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
+	    function showMessage(context) {
+	      var currEntity = context.hasEntity(entity.id);
+	      if (!currEntity) return '';
+	      var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
-	    var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
+	        messageID += '_incomplete';
+	      }
 
-	    if (title === unknown) {
-	      title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+	      return _t.html(messageID, {
+	        feature: utilDisplayLabel(currEntity, context.graph(), true
+	        /* verbose */
+	        )
+	      });
 	    }
 
-	    return title;
-	  }
-
-	  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);
+	    function showReference(selection) {
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').call(_t.append("issues.outdated_tags.".concat(prefix, "reference")));
+	      enter.append('strong').call(_t.append('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;
+	      });
+	    }
 	  }
 
-	  keepRightHeader.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return keepRightHeader;
-	  };
-
-	  return keepRightHeader;
-	}
+	  function oldMultipolygonIssues(entity, graph) {
+	    var multipolygon, outerWay;
 
-	function uiViewOnKeepRight() {
-	  var _qaItem;
+	    if (entity.type === 'relation') {
+	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+	      multipolygon = entity;
+	    } else if (entity.type === 'way') {
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+	      outerWay = entity;
+	    } else {
+	      return [];
+	    }
 
-	  function viewOnKeepRight(selection) {
-	    var url;
+	    if (!multipolygon || !outerWay) return [];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'old_multipolygon',
+	      severity: 'warning',
+	      message: showMessage,
+	      reference: showReference,
+	      entityIds: [outerWay.id, multipolygon.id],
+	      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'));
+	          }
+	        })];
+	      }
+	    })];
 
-	    if (services.keepRight && _qaItem instanceof QAItem) {
-	      url = services.keepRight.issueURL(_qaItem);
+	    function doUpgrade(graph) {
+	      var currMultipolygon = graph.hasEntity(multipolygon.id);
+	      var currOuterWay = graph.hasEntity(outerWay.id);
+	      if (!currMultipolygon || !currOuterWay) return graph;
+	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
+	      graph = graph.replace(currMultipolygon);
+	      return actionChangeTags(currOuterWay.id, {})(graph);
 	    }
 
-	    var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
-
-	    link.exit().remove(); // enter
+	    function showMessage(context) {
+	      var currMultipolygon = context.hasEntity(multipolygon.id);
+	      if (!currMultipolygon) return '';
+	      return _t.html('issues.old_multipolygon.message', {
+	        multipolygon: utilDisplayLabel(currMultipolygon, context.graph(), true
+	        /* verbose */
+	        )
+	      });
+	    }
 
-	    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'));
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.old_multipolygon.reference'));
+	    }
 	  }
 
-	  viewOnKeepRight.what = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return viewOnKeepRight;
+	  var validation = function checkOutdatedTags(entity, graph) {
+	    var issues = oldMultipolygonIssues(entity, graph);
+	    if (!issues.length) issues = oldTagIssues(entity, graph);
+	    return issues;
 	  };
 
-	  return viewOnKeepRight;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function uiKeepRightEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiKeepRightDetails(context);
-	  var qaHeader = uiKeepRightHeader();
+	function validationPrivateData() {
+	  var type = 'private_data'; // assume that some buildings are private
 
-	  var _qaItem;
+	  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
 
-	  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));
-	  }
+	  var publicKeys = {
+	    amenity: true,
+	    craft: true,
+	    historic: true,
+	    leisure: true,
+	    office: true,
+	    shop: true,
+	    tourism: true
+	  }; // these tags may contain personally identifying info
 
-	  function keepRightSaveSection(selection) {
-	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+	  var personalTags = {
+	    'contact:email': true,
+	    'contact:fax': true,
+	    'contact:phone': true,
+	    email: true,
+	    fax: true,
+	    phone: true
+	  };
 
-	    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
+	  var validation = function checkPrivateData(entity) {
+	    var tags = entity.tags;
+	    if (!tags.building || !privateBuildingValues[tags.building]) return [];
+	    var keepTags = {};
 
-	    saveSection.exit().remove(); // enter
+	    for (var k in tags) {
+	      if (publicKeys[k]) return []; // probably a public feature
+
+	      if (!personalTags[k]) {
+	        keepTags[k] = tags[k];
+	      }
+	    }
+
+	    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
+
+	      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);
+	    }
 
-	    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
+	    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())
+	      });
+	    }
 
-	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+	    function showReference(selection) {
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').call(_t.append('issues.private_data.reference'));
+	      enter.append('strong').call(_t.append('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;
+	      });
+	    }
+	  };
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	  validation.type = type;
+	  return validation;
+	}
 
-	      if (val === _qaItem.comment) {
-	        val = undefined;
-	      } // store the unsaved comment with the issue itself
+	function validationSuspiciousName() {
+	  var type = 'suspicious_name';
+	  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.
 
+	  function isGenericMatchInNsi(tags) {
+	    var nsi = services.nsi;
 
-	      _qaItem = _qaItem.update({
-	        newComment: val
-	      });
-	      var qaService = services.keepRight;
+	    if (nsi) {
+	      _waitingForNsi = nsi.status() === 'loading';
 
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem); // update keepright cache
+	      if (!_waitingForNsi) {
+	        return nsi.isGenericName(tags);
 	      }
-
-	      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
+	    return false;
+	  } // Test if the name is just the key or tag value (e.g. "park")
 
-	    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
 
-	    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
+	  function nameMatchesRawTag(lowercaseName, tags) {
+	    for (var i = 0; i < keysToTestForGenericValues.length; i++) {
+	      var key = keysToTestForGenericValues[i];
+	      var val = tags[key];
 
-	      var qaService = services.keepRight;
+	      if (val) {
+	        val = val.toLowerCase();
 
-	      if (qaService) {
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.call('change', item);
-	        });
+	        if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
+	          return true;
+	        }
 	      }
-	    });
-	    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
+	    }
 
-	      var qaService = services.keepRight;
+	    return false;
+	  }
 
-	      if (qaService) {
-	        d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
+	  function isGenericName(name, tags) {
+	    name = name.toLowerCase();
+	    return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
+	  }
 
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.call('change', item);
+	  function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'generic_name',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        if (!entity) return '';
+	        var preset = _mainPresetIndex.match(entity, context.graph());
+	        var langName = langCode && _mainLocalizer.languageName(langCode);
+	        return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: genericName,
+	          language: langName
 	        });
+	      },
+	      reference: showReference,
+	      entityIds: [entityId],
+	      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'));
+	          }
+	        })];
 	      }
 	    });
-	    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;
 
-	      if (qaService) {
-	        d.newStatus = 'ignore'; // ignore permanently (false positive)
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
+	    }
+	  }
 
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.call('change', item);
+	  function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'not_name',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        if (!entity) return '';
+	        var preset = _mainPresetIndex.match(entity, context.graph());
+	        var langName = langCode && _mainLocalizer.languageName(langCode);
+	        return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: incorrectName,
+	          language: langName
 	        });
+	      },
+	      reference: showReference,
+	      entityIds: [entityId],
+	      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'));
+	          }
+	        })];
 	      }
 	    });
-	  } // NOTE: Don't change method name until UI v3 is merged
 
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
+	    }
+	  }
 
-	  keepRightEditor.error = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return keepRightEditor;
-	  };
+	  var validation = function checkGenericName(entity) {
+	    var tags = entity.tags; // a generic name is allowed if it's a known brand or entity
 
-	  return utilRebind(keepRightEditor, dispatch$1, 'on');
-	}
+	    var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+	    if (hasWikidata) return [];
+	    var issues = [];
+	    var notNames = (tags['not:name'] || '').split(';');
 
-	function uiOsmoseDetails(context) {
-	  var _qaItem;
+	    for (var key in tags) {
+	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
+	      if (!m) continue;
+	      var langCode = m.length >= 2 ? m[1] : null;
+	      var value = tags[key];
 
-	  function issueString(d, type) {
-	    if (!d) return ''; // Issue strings are cached from Osmose API
+	      if (notNames.length) {
+	        for (var i in notNames) {
+	          var notName = notNames[i];
 
-	    var s = services.osmose.getStrings(d.itemType);
-	    return type in s ? s[type] : '';
-	  }
+	          if (notName && value === notName) {
+	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
+	            continue;
+	          }
+	        }
+	      }
 
-	  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
+	      if (isGenericName(value, tags)) {
+	        issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
 
-	    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)
+	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+	      }
+	    }
 
+	    return issues;
+	  };
 
-	    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)
+	  validation.type = type;
+	  return validation;
+	}
 
-	    if (issueString(_qaItem, 'fix')) {
-	      var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	function validationUnsquareWay(context) {
+	  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
 
-	      _div.append('h4').html(_t.html('QA.osmose.fix_title'));
+	  var epsilon = 0.05;
+	  var nodeThreshold = 10;
 
-	      _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)
+	  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) {
+	    if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-	    if (issueString(_qaItem, 'trap')) {
-	      var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    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
 
-	      _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
+	    var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-	      _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
+	    if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+	    // 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 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 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 []; // user-configurable square threshold
 
-	      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
+	    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
 
-	      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
+	    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', {
+	        n: 1
+	      })];
+	    }
 
-	      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
+	    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
 
-	        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');
+	            context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+	              n: 1
+	            })); // run after the squaring transition (currently 150ms)
 
-	          if (!osmlayer.enabled()) {
-	            osmlayer.enabled(true);
+	            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')
+	                );
+	            }
+	        })
+	        */
+	        ];
+	      }
+	    })];
 
-	          context.map().centerZoom(d.loc, 20);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unsquare_way.buildings.reference'));
+	    }
+	  };
 
-	          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)
+	  validation.type = type;
+	  return validation;
+	}
 
-	        if (entity) {
-	          var name = utilDisplayName(entity); // try to use common name
+	var Validations = /*#__PURE__*/Object.freeze({
+		__proto__: null,
+		validationAlmostJunction: validationAlmostJunction,
+		validationCloseNodes: validationCloseNodes,
+		validationCrossingWays: validationCrossingWays,
+		validationDisconnectedWay: validationDisconnectedWay,
+		validationFormatting: validationFormatting,
+		validationHelpRequest: validationHelpRequest,
+		validationImpossibleOneway: validationImpossibleOneway,
+		validationIncompatibleSource: validationIncompatibleSource,
+		validationMaprules: validationMaprules,
+		validationMismatchedGeometry: validationMismatchedGeometry,
+		validationMissingRole: validationMissingRole,
+		validationMissingTag: validationMissingTag,
+		validationOutdatedTags: validationOutdatedTags,
+		validationPrivateData: validationPrivateData,
+		validationSuspiciousName: validationSuspiciousName,
+		validationUnsquareWay: validationUnsquareWay
+	});
 
-	          if (!name) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-	          }
+	function coreValidator(context) {
+	  var _this = this;
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      }); // Don't hide entities related to this issue - #5880
+	  var dispatch = dispatch$8('validated', 'focusedIssue');
+	  var validator = utilRebind({}, dispatch, 'on');
+	  var _rules = {};
+	  var _disabledRules = {};
 
-	      context.features().forceVisible(d.elems);
-	      context.map().pan([0, 0]); // trigger a redraw
-	    })["catch"](function (err) {
-	      console.log(err); // eslint-disable-line no-console
-	    });
-	  }
+	  var _ignoredIssueIDs = new Set();
 
-	  osmoseDetails.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return osmoseDetails;
-	  };
+	  var _resolvedIssueIDs = new Set();
 
-	  return osmoseDetails;
-	}
+	  var _baseCache = validationCache('base'); // issues before any user edits
 
-	function uiOsmoseHeader() {
-	  var _qaItem;
 
-	  function issueTitle(d) {
-	    var unknown = _t('inspector.unknown');
-	    if (!d) return unknown; // Issue titles supplied by Osmose
+	  var _headCache = validationCache('head'); // issues after all user edits
 
-	    var s = services.osmose.getStrings(d.itemType);
-	    return 'title' in s ? s.title : unknown;
-	  }
 
-	  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;
+	  var _completeDiff = {}; // complete diff base -> head of what the user changed
 
-	      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);
-	  }
+	  var _headIsCurrent = false;
 
-	  osmoseHeader.issue = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return osmoseHeader;
-	  };
+	  var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )
 
-	  return osmoseHeader;
-	}
 
-	function uiViewOnOsmose() {
-	  var _qaItem;
+	  var _deferredST = new Set(); // Set( SetTimeout handles )
 
-	  function viewOnOsmose(selection) {
-	    var url;
 
-	    if (services.osmose && _qaItem instanceof QAItem) {
-	      url = services.osmose.itemURL(_qaItem);
-	    }
+	  var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot
 
-	    var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-	    link.exit().remove(); // enter
+	  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 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'));
-	  }
 
-	  viewOnOsmose.what = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return viewOnOsmose;
-	  };
+	  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;
 
-	  return viewOnOsmose;
-	}
+	    function makeRegExp(str) {
+	      var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+	      .replace(/\*/g, '.*'); // treat a '*' like '.*'
 
-	function uiOsmoseEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiOsmoseDetails(context);
-	  var qaHeader = uiOsmoseHeader();
+	      return new RegExp('^' + escaped + '$');
+	    }
+	  } // `init()`
+	  // Initialize the validator, called once on iD startup
+	  //
 
-	  var _qaItem;
 
-	  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));
-	  }
+	  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 (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
+	  //
 
-	  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 reset(resetIgnored) {
+	    // cancel deferred work
+	    _deferredRIC.forEach(window.cancelIdleCallback);
 
-	    saveSection.exit().remove(); // enter
+	    _deferredRIC.clear();
 
-	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
+	    _deferredST.forEach(window.clearTimeout);
 
-	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
-	  }
+	    _deferredST.clear(); // empty queues and resolve any pending promise
 
-	  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
+	    _baseCache.queue = [];
+	    _headCache.queue = [];
+	    processQueue(_headCache);
+	    processQueue(_baseCache); // clear caches
 
-	    buttonSection.exit().remove(); // enter
+	    if (resetIgnored) _ignoredIssueIDs.clear();
 
-	    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
+	    _resolvedIssueIDs.clear();
 
-	    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
+	    _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)
+	  //
 
-	      var qaService = services.osmose;
 
-	      if (qaService) {
-	        d.newStatus = 'done';
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.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
+	  validator.reset = function () {
+	    reset(true);
+	  }; // `resetIgnoredIssues()`
+	  // clears out the _ignoredIssueIDs Set
+	  //
 
-	      var qaService = services.osmose;
 
-	      if (qaService) {
-	        d.newStatus = 'false';
-	        qaService.postUpdate(d, function (err, item) {
-	          return dispatch$1.call('change', item);
-	        });
-	      }
-	    });
-	  } // NOTE: Don't change method name until UI v3 is merged
+	  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.
+	  //
 
-	  osmoseEditor.error = function (val) {
-	    if (!arguments.length) return _qaItem;
-	    _qaItem = val;
-	    return osmoseEditor;
+
+	  validator.revalidateUnsquare = function () {
+	    revalidateUnsquare(_headCache);
+	    revalidateUnsquare(_baseCache);
+	    dispatch.call('validated');
 	  };
 
-	  return utilRebind(osmoseEditor, dispatch$1, 'on');
-	}
+	  function revalidateUnsquare(cache) {
+	    var checkUnsquareWay = _rules.unsquare_way;
+	    if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-	function modeSelectError(context, selectedErrorID, selectedErrorService) {
-	  var mode = {
-	    id: 'select-error',
-	    button: 'browse'
-	  };
-	  var keybinding = utilKeybinding('select-error');
-	  var errorService = services[selectedErrorService];
-	  var errorEditor;
+	    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
 
-	  switch (selectedErrorService) {
-	    case 'improveOSM':
-	      errorEditor = uiImproveOsmEditor(context).on('change', function () {
-	        context.map().pan([0, 0]); // trigger a redraw
+	    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
+	  //
 
-	        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
+	  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
 
-	        var error = checkSelectedID();
-	        if (!error) return;
-	        context.ui().sidebar.show(errorEditor.error(error));
+	        if (!filter(issue)) return;
+	        seen.add(issue.id);
+	        results.push(issue);
 	      });
-	      break;
+	    } // collect base issues - present before user edits
 
-	    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));
+	    if (opts.what === 'all') {
+	      Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+	        if (!filter(issue)) return;
+	        seen.add(issue.id);
+	        results.push(issue);
 	      });
-	      break;
-	  }
+	    }
 
-	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	    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.
 
-	  function checkSelectedID() {
-	    if (!errorService) return;
-	    var error = errorService.getError(selectedErrorID);
+	    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.
 
-	    if (!error) {
-	      context.enter(modeBrowse(context));
+	      if ((issue.entityIds || []).some(function (id) {
+	        return !context.hasEntity(id);
+	      })) return false;
+
+	      if (opts.where === 'visible') {
+	        var extent = issue.extent(context.graph());
+	        if (!view.intersects(extent)) return false;
+	      }
+
+	      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
+	  //
 
-	    return error;
-	  }
 
-	  mode.zoomToSelected = function () {
-	    if (!errorService) return;
-	    var error = errorService.getError(selectedErrorID);
+	  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 (error) {
-	      context.map().centerZoomEase(error.loc, 20);
-	    }
-	  };
 
-	  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
+	  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..
 
-	    function selectError(d3_event, drawn) {
-	      if (!checkSelectedID()) return;
-	      var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+	    var issueExtent = issue.extent(graph);
 
-	      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;
+	    if (issueExtent) {
+	      focusCenter = issueExtent.center();
+	    } // Try to select the first entity in the issue..
 
-	        if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	          context.enter(modeBrowse(context));
+
+	    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);
+	        });
+
+	        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
+	          }
+	        }
+
+	        if (nodeID) {
+	          focusCenter = graph.entity(nodeID).loc;
 	        }
-	      } else {
-	        selection.classed('selected', true);
-	        context.selectedErrorID(selectedErrorID);
 	      }
 	    }
 
-	    function esc() {
-	      if (context.container().select('.combobox').size()) return;
-	      context.enter(modeBrowse(context));
+	    if (focusCenter) {
+	      // Adjust the view
+	      var setZoom = Math.max(context.map().zoom(), 19);
+	      context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
 	    }
-	  };
 
-	  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([]);
-	  };
+	    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
+	  //   }
+	  //
 
-	  return mode;
-	}
 
-	function behaviorSelect(context) {
-	  var _tolerancePx = 4; // see also behaviorDrag
+	  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
+	  //
 
-	  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; // use pointer events on supported platforms; fallback to mouse events
+	  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;
+	      }
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      var index1 = orderedIssueTypes.indexOf(issue1.type);
+	      var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-	  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;
-	    }
+	      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
+	  //
 
-	    if (d3_event.keyCode === 93 || // context menu key
-	    d3_event.keyCode === 32) {
-	      // spacebar
-	      d3_event.preventDefault();
-	    }
 
-	    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
+	  validator.getEntityIssues = function (entityID, options) {
+	    return validator.getSharedEntityIssues([entityID], options);
+	  }; // `getRuleKeys()`
+	  //
+	  // Returns
+	  //   An Array containing the rule keys
+	  //
 
-	    cancelLongPress();
 
-	    if (d3_event.shiftKey) {
-	      context.surface().classed('behavior-multiselect', true);
+	  validator.getRuleKeys = function () {
+	    return Object.keys(_rules);
+	  }; // `isRuleEnabled()`
+	  //
+	  // Arguments
+	  //   `key` - the rule to check (e.g. 'crossing_ways')
+	  // Returns
+	  //   `true`/`false`
+	  //
+
+
+	  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')
+	  //
+
+
+	  validator.toggleRule = function (key) {
+	    if (_disabledRules[key]) {
+	      delete _disabledRules[key];
+	    } else {
+	      _disabledRules[key] = true;
 	    }
 
-	    if (d3_event.keyCode === 32) {
-	      // spacebar
-	      if (!_downPointers.spacebar && _lastMouseEvent) {
-	        cancelLongPress();
-	        _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
-	        _downPointers.spacebar = {
-	          firstEvent: _lastMouseEvent,
-	          lastEvent: _lastMouseEvent
-	        };
-	      }
+	    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
+	  //
+
+
+	  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
+	  //
+
+
+	  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.
+	  //
+
+
+	  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();
+
+	    if (currGraph === prevGraph) {
+	      // _headCache.graph is current - we are caught up
+	      _headIsCurrent = true;
+	      dispatch.call('validated');
+	      return Promise.resolve();
 	    }
-	  }
 
-	  function keyup(d3_event) {
-	    cancelLongPress();
+	    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
 
-	    if (!d3_event.shiftKey) {
-	      context.surface().classed('behavior-multiselect', false);
+	      return _headPromise;
+	    } // If we get here, its time to start validating stuff.
+
+
+	    _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();
 	    }
 
-	    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;
+	    _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+	      return updateResolvedIssues(entityIDs);
+	    }).then(function () {
+	      return dispatch.call('validated');
+	    })["catch"](function () {
+	      /* ignore */
+	    }).then(function () {
+	      _headPromise = null;
 
-	      if (pointer) {
-	        delete _downPointers.spacebar;
-	        if (pointer.done) return;
-	        d3_event.preventDefault();
-	        _lastInteractionType = 'spacebar';
-	        click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+	      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:
 
-	  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
-	    };
-	  }
 
-	  function didLongPress(id, interactionType) {
-	    var pointer = _downPointers[id];
-	    if (!pointer) return;
+	  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
 
-	    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
+	    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:
 
-	    _longPressTimeout = null;
-	    _lastInteractionType = interactionType;
-	    _showMenu = true;
-	    click(pointer.firstEvent, pointer.lastEvent, id);
-	  }
+	  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)
 
-	  function pointermove(d3_event) {
-	    var id = (d3_event.pointerId || 'mouse').toString();
+	    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
+	  //   }
+	  //
 
-	    if (_downPointers[id]) {
-	      _downPointers[id].lastEvent = d3_event;
-	    }
+	  function validateEntity(entity, graph) {
+	    var result = {
+	      issues: [],
+	      provisional: false
+	    };
+	    Object.keys(_rules).forEach(runValidation); // run all rules
 
-	    if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
-	      _lastMouseEvent = d3_event;
+	    return result; // runs validation and appends resulting issues
 
-	      if (_downPointers.spacebar) {
-	        _downPointers.spacebar.lastEvent = d3_event;
+	    function runValidation(key) {
+	      var fn = _rules[key];
+
+	      if (typeof fn !== 'function') {
+	        console.error('no such validation rule = ' + key); // eslint-disable-line no-console
+
+	        return;
 	      }
-	    }
-	  }
 
-	  function pointerup(d3_event) {
-	    var id = (d3_event.pointerId || 'mouse').toString();
-	    var pointer = _downPointers[id];
-	    if (!pointer) return;
-	    delete _downPointers[id];
+	      var detected = fn(entity, graph);
 
-	    if (_multiselectionPointerId === id) {
-	      _multiselectionPointerId = null;
-	    }
+	      if (detected.provisional) {
+	        // this validation should be run again later
+	        result.provisional = true;
+	      }
 
-	    if (pointer.done) return;
-	    click(pointer.firstEvent, d3_event, id);
-	  }
+	      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.
 
-	  function pointercancel(d3_event) {
-	    var id = (d3_event.pointerId || 'mouse').toString();
-	    if (!_downPointers[id]) return;
-	    delete _downPointers[id];
+	      function applySeverityOverrides(issue) {
+	        var type = issue.type;
+	        var subtype = issue.subtype || '';
+	        var i;
 
-	    if (_multiselectionPointerId === id) {
-	      _multiselectionPointerId = null;
-	    }
-	  }
+	        for (i = 0; i < _errorOverrides.length; i++) {
+	          if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+	            issue.severity = 'error';
+	            return true;
+	          }
+	        }
 
-	  function contextmenu(d3_event) {
-	    d3_event.preventDefault();
+	        for (i = 0; i < _warningOverrides.length; i++) {
+	          if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+	            issue.severity = 'warning';
+	            return true;
+	          }
+	        }
 
-	    if (!+d3_event.clientX && !+d3_event.clientY) {
-	      if (_lastMouseEvent) {
-	        d3_event.sourceEvent = _lastMouseEvent;
-	      } else {
-	        return;
+	        for (i = 0; i < _disableOverrides.length; i++) {
+	          if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+	            return false;
+	          }
+	        }
+
+	        return true;
 	      }
-	    } else {
-	      _lastMouseEvent = d3_event;
-	      _lastInteractionType = 'rightclick';
 	    }
+	  } // `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.
+	  //
 
-	    _showMenu = true;
-	    click(d3_event, d3_event);
-	  }
 
-	  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.
+	  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);
+	        });
 
-	    var pointGetter = utilFastMouse(mapNode);
-	    var p1 = pointGetter(firstEvent);
-	    var p2 = pointGetter(lastEvent);
-	    var dist = geoVecLength(p1, p2);
+	        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)
 
-	    if (dist > _tolerancePx || !mapContains(lastEvent)) {
-	      resetProperties();
-	      return;
-	    }
+	        }
+	      });
+	    });
+	  } // `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.
+	  //
 
-	    var targetDatum = lastEvent.target.__data__;
-	    var multiselectEntityId;
 
-	    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);
+	  function validateEntitiesAsync(entityIDs, cache) {
+	    // Enqueue the work
+	    var jobs = Array.from(entityIDs).map(function (entityID) {
+	      if (cache.queuedEntityIDs.has(entityID)) return null; // queued already
 
-	      if (selectPointerInfo) {
-	        _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
+	      cache.queuedEntityIDs.add(entityID); // Clear caches for existing issues related to this entity
 
-	        multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-	        _downPointers[selectPointerInfo.pointerId].done = true;
-	      }
-	    } // support multiselect if data is already selected
+	      cache.uncacheEntityID(entityID);
+	      return function () {
+	        cache.queuedEntityIDs["delete"](entityID);
+	        var graph = cache.graph;
+	        if (!graph) return; // was reset?
 
+	        var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities
 
-	    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);
+	        if (!entity) return; // detect new issues and update caches
 
-	    processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+	        var result = validateEntity(entity, graph);
 
-	    function mapContains(event) {
-	      var rect = mapNode.getBoundingClientRect();
-	      return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
-	    }
+	        if (result.provisional) {
+	          // provisional result
+	          cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
+	        }
 
-	    function pointerDownOnSelection(skipPointerId) {
-	      var mode = context.mode();
-	      var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
+	        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.
 
-	      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;
-	        if (context.graph().hasEntity(entity.id)) return {
-	          pointerId: pointerId,
-	          entityId: entity.id,
-	          selected: selectedIDs.indexOf(entity.id) !== -1
-	        };
-	      }
+	    cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
 
-	      return null;
-	    }
-	  }
+	    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)
+	  //
 
-	  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;
 
-	    if (datum && datum.type === 'midpoint') {
-	      // treat targeting midpoints as if targeting the parent way
-	      datum = datum.parents[0];
-	    }
+	  function revalidateProvisionalEntities(cache) {
+	    if (!cache.provisionalEntityIDs.size) return; // nothing to do
+
+	    var handle = window.setTimeout(function () {
+	      _deferredST["delete"](handle);
+
+	      if (!cache.provisionalEntityIDs.size) return; // nothing to do
+
+	      validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+	    }, RETRY);
+
+	    _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.
+	  //
 
-	    var newMode;
 
-	    if (datum instanceof osmEntity) {
-	      // targeting an entity
-	      var selectedIDs = context.selectedIDs();
-	      context.selectedNoteID(null);
-	      context.selectedErrorID(null);
+	  function processQueue(cache) {
+	    // console.log(`${cache.which} queue length ${cache.queue.length}`);
+	    if (!cache.queue.length) return Promise.resolve(); // we're done
 
-	      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
+	    var chunk = cache.queue.pop();
+	    return new Promise(function (resolvePromise) {
+	      var handle = window.requestIdleCallback(function () {
+	        _deferredRIC["delete"](handle); // const t0 = performance.now();
 
-	          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);
 
-	      if (!isMultiselect && mode.id !== 'browse') {
-	        context.enter(modeBrowse(context));
-	      }
-	    }
+	        chunk.forEach(function (job) {
+	          return job();
+	        }); // const t1 = performance.now();
+	        // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-	    context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
+	        resolvePromise();
+	      });
 
-	    if (showMenu) context.ui().showEditMenu(point, interactionType);
-	    resetProperties();
+	      _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);
+	    });
 	  }
 
-	  function cancelLongPress() {
-	    if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
-	    _longPressTimeout = null;
-	  }
+	  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
+	//
 
-	  function resetProperties() {
-	    cancelLongPress();
-	    _showMenu = false;
-	    _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
-	  }
+	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)
 
-	  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;
+	  };
 
-	      if (+e.clientX === 0 && +e.clientY === 0) {
-	        d3_event.preventDefault();
+	  cache.cacheIssue = function (issue) {
+	    (issue.entityIds || []).forEach(function (entityID) {
+	      if (!cache.issuesByEntityID[entityID]) {
+	        cache.issuesByEntityID[entityID] = new Set();
 	      }
+
+	      cache.issuesByEntityID[entityID].add(issue.id);
 	    });
-	    selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
-	    /*if (d3_event && d3_event.shiftKey) {
-	        context.surface()
-	            .classed('behavior-multiselect', true);
-	    }*/
-	  }
+	    cache.issuesByIssueID[issue.id] = issue;
+	  };
 
-	  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);
+	  cache.uncacheIssue = function (issue) {
+	    (issue.entityIds || []).forEach(function (entityID) {
+	      if (cache.issuesByEntityID[entityID]) {
+	        cache.issuesByEntityID[entityID]["delete"](issue.id);
+	      }
+	    });
+	    delete cache.issuesByIssueID[issue.id];
 	  };
 
-	  return behavior;
-	}
+	  cache.cacheIssues = function (issues) {
+	    issues.forEach(cache.cacheIssue);
+	  };
 
-	function behaviorDrawWay(context, wayID, mode, startGraph) {
-	  var dispatch$1 = dispatch('rejectedSelfIntersection');
-	  var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
+	  cache.uncacheIssues = function (issues) {
+	    issues.forEach(cache.uncacheIssue);
+	  };
 
-	  var _nodeIndex;
+	  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 _origWay;
 
-	  var _wayGeometry;
+	  cache.uncacheEntityID = function (entityID) {
+	    var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-	  var _headNodeID;
+	    if (entityIssueIDs) {
+	      entityIssueIDs.forEach(function (issueID) {
+	        var issue = cache.issuesByIssueID[issueID];
 
-	  var _annotation;
+	        if (issue) {
+	          cache.uncacheIssue(issue);
+	        } else {
+	          // shouldn't happen, clean up
+	          delete cache.issuesByIssueID[issueID];
+	        }
+	      });
+	    }
 
-	  var _pointerHasMoved = false; // The osmNode to be placed.
-	  // This is temporary and just follows the mouse cursor until an "add" event occurs.
+	    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.
+	  //
 
-	  var _drawNode;
 
-	  var _didResolveTempEdit = false;
+	  cache.withAllRelatedEntities = function (entityIDs) {
+	    var result = new Set();
+	    (entityIDs || []).forEach(function (entityID) {
+	      result.add(entityID); // include self
 
-	  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();
-	  }
+	      var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-	  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 (entityIssueIDs) {
+	        entityIssueIDs.forEach(function (issueID) {
+	          var issue = cache.issuesByIssueID[issueID];
 
-	  function keydown(d3_event) {
-	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-	      if (context.surface().classed('nope')) {
-	        context.surface().classed('nope-suppressed', true);
+	          if (issue) {
+	            (issue.entityIds || []).forEach(function (relatedID) {
+	              return result.add(relatedID);
+	            });
+	          } else {
+	            // shouldn't happen, clean up
+	            delete cache.issuesByIssueID[issueID];
+	          }
+	        });
 	      }
+	    });
+	    return result;
+	  };
 
-	      context.surface().classed('nope', false).classed('nope-disabled', true);
-	    }
-	  }
+	  return cache;
+	}
 
-	  function keyup(d3_event) {
-	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-	      if (context.surface().classed('nope-suppressed')) {
-	        context.surface().classed('nope', true);
-	      }
+	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 = [];
 
-	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
-	    }
-	  }
+	  var _origChanges;
 
-	  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()`
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var uploader = utilRebind({}, dispatch, 'on');
 
+	  uploader.isSaving = function () {
+	    return _isSaving;
+	  };
 
-	  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;
+	  uploader.save = function (changeset, tryAgain, checkConflicts) {
+	    // Guard against accidentally entering save code twice - #4641
+	    if (_isSaving && !tryAgain) {
+	      return;
+	    }
 
-	    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);
+	    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 (choice) {
-	        loc = choice.loc;
-	      }
+	    if (!osm.authenticated()) {
+	      osm.authenticate(function (err) {
+	        if (!err) {
+	          uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
+	        }
+	      });
+	      return;
 	    }
 
-	    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
+	    if (!_isSaving) {
+	      _isSaving = true;
+	      dispatch.call('saveStarted', this);
+	    }
 
+	    var history = context.history();
+	    _conflicts = [];
+	    _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-	  function checkGeometry(includeDrawNode) {
-	    var nopeDisabled = context.surface().classed('nope-disabled');
-	    var isInvalid = isInvalidGeometry(includeDrawNode);
+	    _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 (nopeDisabled) {
-	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    if (!tryAgain) {
+	      history.perform(actionNoop());
+	    } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
+
+
+	    if (!checkConflicts) {
+	      upload(changeset); // Do the full (slow) conflict check..
 	    } else {
-	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+	      performFullConflictCheck(changeset);
 	    }
-	  }
+	  };
 
-	  function isInvalidGeometry(includeDrawNode) {
-	    var testNode = _drawNode; // we only need to test the single way we're drawing
+	  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 = [];
 
-	    var parentWay = context.graph().entity(wayID);
-	    var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
+	    for (var i = 0; i < summary.length; i++) {
+	      var item = summary[i];
 
-	    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;
+	      if (item.changeType === 'modified') {
+	        _toCheck.push(item.entity.id);
 	      }
 	    }
 
-	    return testNode && geoHasSelfIntersections(nodes, testNode.id);
-	  }
+	    var _toLoad = withChildNodes(_toCheck, localGraph);
 
-	  function undone() {
-	    // undoing removed the temp edit
-	    _didResolveTempEdit = true;
-	    context.pauseChangeDispatch();
-	    var nextMode;
+	    var _loaded = {};
+	    var _toLoadCount = 0;
+	    var _toLoadTotal = _toLoad.length;
 
-	    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]);
+	    if (_toCheck.length) {
+	      dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+
+	      _toLoad.forEach(function (id) {
+	        _loaded[id] = false;
+	      });
+
+	      osm.loadMultiple(_toLoad, loaded);
 	    } 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
+	      upload(changeset);
+	    }
 
-	      nextMode = mode;
-	    } // clear the redo stack by adding and removing a blank edit
+	    return;
 
+	    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..
 
-	    context.perform(actionNoop());
-	    context.pop(1);
-	    context.resumeChangeDispatch();
-	    context.enter(nextMode);
-	  }
 
-	  function setActiveElements() {
-	    if (!_drawNode) return;
-	    context.surface().selectAll('.' + _drawNode.id).classed('active', true);
-	  }
+	    function loaded(err, result) {
+	      if (_errors.length) return;
 
-	  function resetToStartGraph() {
-	    while (context.graph() !== startGraph) {
-	      context.pop();
-	    }
-	  }
+	      if (err) {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	  var drawWay = function drawWay(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.
+	        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..
 
-	    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);
-	  };
+	          var i, id;
 
-	  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();
-	    }
+	          if (entity.type === 'way') {
+	            for (i = 0; i < entity.nodes.length; i++) {
+	              id = entity.nodes[i];
 
-	    _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);
-	  };
+	              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 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);
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
+	            }
+	          }
+	        });
+	        _toLoadCount += result.data.length;
+	        _toLoadTotal += loadMore.length;
+	        dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+
+	        if (loadMore.length) {
+	          _toLoad.push.apply(_toLoad, loadMore);
+
+	          osm.loadMultiple(loadMore, loaded);
+	        }
+
+	        if (!_toLoad.length) {
+	          detectConflicts();
+	          upload(changeset);
+	        }
+	      }
 	    }
 
-	    checkGeometry(true
-	    /* includeDrawNode */
-	    );
+	    function detectConflicts() {
+	      function choice(id, text, _action) {
+	        return {
+	          id: id,
+	          text: text,
+	          action: function action() {
+	            history.replace(_action);
+	          }
+	        };
+	      }
 
-	    if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
-	      if (!_pointerHasMoved) {
-	        // prevent the temporary draw node from appearing on touch devices
-	        removeDrawNode();
+	      function formatUser(d) {
+	        return '<a href="' + osm.userURL(d) + '" target="_blank">' + escape$4(d) + '</a>';
 	      }
 
-	      dispatch$1.call('rejectedSelfIntersection', this);
-	      return; // can't click here
-	    }
+	      function entityName(entity) {
+	        return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+	      }
 
-	    context.pauseChangeDispatch();
-	    doAdd(); // we just replaced the temporary edit with the real one
+	      function sameVersions(local, remote) {
+	        if (local.version !== remote.version) return false;
 
-	    _didResolveTempEdit = true;
-	    context.resumeChangeDispatch();
-	    context.enter(mode);
-	  } // Accept the current position of the drawing node
+	        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;
+	          }
+	        }
 
+	        return true;
+	      }
 
-	  drawWay.add = function (loc, d) {
-	    attemptAdd(d, loc, function () {// don't need to do anything extra
-	    });
-	  }; // Connect the way to an existing way
+	      _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'));
 
-	  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
+	        _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();
 
-	  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;
+	    if (!osm) {
+	      _errors.push({
+	        msg: 'No OSM Service'
+	      });
 	    }
 
-	    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);
-	    });
-	  }; // 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.
+	    if (_conflicts.length) {
+	      didResultInConflicts(changeset);
+	    } else if (_errors.length) {
+	      didResultInErrors();
+	    } else {
+	      var history = context.history();
+	      var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
+	      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();
+	      }
+	    }
+	  }
 
-	  drawWay.finish = function () {
-	    checkGeometry(false
-	    /* includeDrawNode */
-	    );
+	  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
+	          })]
+	        });
 
-	    if (context.surface().classed('nope')) {
-	      dispatch$1.call('rejectedSelfIntersection', this);
-	      return; // can't click here
+	        didResultInErrors();
+	      }
+	    } else {
+	      didResultInSuccess(changeset);
 	    }
+	  }
 
-	    context.pauseChangeDispatch(); // remove the temporary edit
+	  function didResultInNoChanges() {
+	    dispatch.call('resultNoChanges', this);
+	    endSave();
+	    context.flush(); // reset iD
+	  }
 
-	    context.pop(1);
-	    _didResolveTempEdit = true;
-	    context.resumeChangeDispatch();
-	    var way = context.hasEntity(wayID);
+	  function didResultInErrors() {
+	    context.history().pop();
+	    dispatch.call('resultErrors', this, _errors);
+	    endSave();
+	  }
 
-	    if (!way || way.isDegenerate()) {
-	      drawWay.cancel();
-	      return;
-	    }
+	  function didResultInConflicts(changeset) {
+	    _conflicts.sort(function (a, b) {
+	      return b.id.localeCompare(a.id);
+	    });
 
-	    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.
+	    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
 
-	  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));
-	  };
-
-	  drawWay.nodeIndex = function (val) {
-	    if (!arguments.length) return _nodeIndex;
-	    _nodeIndex = val;
-	    return drawWay;
-	  };
+	      endSave();
+	      context.flush(); // reset iD
+	    }, 2500);
+	  }
 
-	  drawWay.activeID = function () {
-	    if (!arguments.length) return _drawNode && _drawNode.id; // no assign
+	  function endSave() {
+	    _isSaving = false;
+	    dispatch.call('saveEnded', this);
+	  }
 
-	    return drawWay;
+	  uploader.cancelConflictResolution = function () {
+	    context.history().pop();
 	  };
 
-	  return utilRebind(drawWay, dispatch$1, 'on');
-	}
+	  uploader.processResolvedConflicts = function (changeset) {
+	    var history = context.history();
 
-	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;
+	    for (var i = 0; i < _conflicts.length; i++) {
+	      if (_conflicts[i].chosen === 1) {
+	        // user chose "use theirs"
+	        var entity = context.hasEntity(_conflicts[i].id);
 
-	  mode.enter = function () {
-	    behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
-	    context.install(behavior);
-	  };
+	        if (entity && entity.type === 'way') {
+	          var children = utilArrayUniq(entity.nodes);
 
-	  mode.exit = function () {
-	    context.uninstall(behavior);
-	  };
+	          for (var j = 0; j < children.length; j++) {
+	            history.replace(actionRevert(children[j]));
+	          }
+	        }
 
-	  mode.selectedIDs = function () {
-	    return [wayID];
-	  };
+	        history.replace(actionRevert(_conflicts[i].id));
+	      }
+	    }
 
-	  mode.activeID = function () {
-	    return behavior && behavior.activeID() || [];
+	    uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
 	  };
 
-	  return mode;
+	  uploader.reset = function () {};
+
+	  return uploader;
 	}
 
-	function operationContinue(context, selectedIDs) {
-	  var _entities = selectedIDs.map(function (id) {
-	    return context.graph().entity(id);
-	  });
+	var $$2 = _export;
+	var fails = fails$V;
+	var expm1 = mathExpm1;
 
-	  var _geometries = Object.assign({
-	    line: [],
-	    vertex: []
-	  }, utilArrayGroupBy(_entities, function (entity) {
-	    return entity.geometry(context.graph());
-	  }));
+	var abs = Math.abs;
+	var exp = Math.exp;
+	var E = Math.E;
 
-	  var _vertex = _geometries.vertex.length && _geometries.vertex[0];
+	var FORCED = fails(function () {
+	  // eslint-disable-next-line es/no-math-sinh -- required for testing
+	  return Math.sinh(-2e-17) != -2e-17;
+	});
 
-	  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);
-	    }) : [];
+	// `Math.sinh` method
+	// https://tc39.es/ecma262/#sec-math.sinh
+	// V8 near Chromium 38 has a problem with very small numbers
+	$$2({ 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 _candidates = candidateWays();
-
-	  var operation = function operation() {
-	    var candidate = _candidates[0];
-	    context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
-	  };
-
-	  operation.relatedEntityIds = function () {
-	    return _candidates.length ? [_candidates[0].id] : [];
-	  };
-
-	  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';
-	    }
-
-	    return false;
-	  };
+	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
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
-	  };
+	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;
+	});
 
-	  operation.annotation = function () {
-	    return _t('operations.continue.annotation.line');
+	function localeDateString(s) {
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
 	  };
-
-	  operation.id = 'continue';
-	  operation.keys = [_t('operations.continue.key')];
-	  operation.title = _t('operations.continue.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
 	}
 
-	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
+	function vintageRange(vintage) {
+	  var s;
 
-	      return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
-	    });
+	  if (vintage.start || vintage.end) {
+	    s = vintage.start || '?';
+
+	    if (vintage.start !== vintage.end) {
+	      s += ' - ' + (vintage.end || '?');
+	    }
 	  }
 
-	  var operation = function operation() {
-	    var graph = context.graph();
-	    var selected = groupEntities(getFilteredIdsToCopy(), graph);
-	    var canCopy = [];
-	    var skip = {};
-	    var entity;
-	    var i;
+	  return s;
+	}
 
-	    for (i = 0; i < selected.relation.length; i++) {
-	      entity = selected.relation[i];
+	function rendererBackgroundSource(data) {
+	  var source = Object.assign({}, data); // shallow copy
 
-	      if (!skip[entity.id] && entity.isComplete(graph)) {
-	        canCopy.push(entity.id);
-	        skip = getDescendants(entity.id, graph, skip);
-	      }
-	    }
+	  var _offset = [0, 0];
+	  var _name = source.name;
+	  var _description = source.description;
 
-	    for (i = 0; i < selected.way.length; i++) {
-	      entity = selected.way[i];
+	  var _best = !!source.best;
 
-	      if (!skip[entity.id]) {
-	        canCopy.push(entity.id);
-	        skip = getDescendants(entity.id, graph, skip);
-	      }
-	    }
+	  var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-	    for (i = 0; i < selected.node.length; i++) {
-	      entity = selected.node[i];
+	  source.tileSize = data.tileSize || 256;
+	  source.zoomExtent = data.zoomExtent || [0, 22];
+	  source.overzoom = data.overzoom !== false;
 
-	      if (!skip[entity.id]) {
-	        canCopy.push(entity.id);
-	      }
-	    }
+	  source.offset = function (val) {
+	    if (!arguments.length) return _offset;
+	    _offset = val;
+	    return source;
+	  };
 
-	    context.copyIDs(canCopy);
+	  source.nudge = function (val, zoomlevel) {
+	    _offset[0] += val[0] / Math.pow(2, zoomlevel);
+	    _offset[1] += val[1] / Math.pow(2, zoomlevel);
+	    return source;
+	  };
 
-	    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);
-	    }
+	  source.name = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t('imagery.' + id_safe + '.name', {
+	      "default": lodash.exports.escape(_name)
+	    });
 	  };
 
-	  function groupEntities(ids, graph) {
-	    var entities = ids.map(function (id) {
-	      return graph.entity(id);
+	  source.label = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.name', {
+	      "default": lodash.exports.escape(_name)
 	    });
-	    return Object.assign({
-	      relation: [],
-	      way: [],
-	      node: []
-	    }, utilArrayGroupBy(entities, 'type'));
-	  }
+	  };
 
-	  function getDescendants(id, graph, descendants) {
-	    var entity = graph.entity(id);
-	    var children;
-	    descendants = descendants || {};
+	  source.description = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.description', {
+	      "default": lodash.exports.escape(_description)
+	    });
+	  };
 
-	    if (entity.type === 'relation') {
-	      children = entity.members.map(function (m) {
-	        return m.id;
-	      });
-	    } else if (entity.type === 'way') {
-	      children = entity.nodes;
-	    } else {
-	      children = [];
-	    }
+	  source.best = function () {
+	    return _best;
+	  };
 
-	    for (var i = 0; i < children.length; i++) {
-	      if (!descendants[children[i]]) {
-	        descendants[children[i]] = true;
-	        descendants = getDescendants(children[i], graph, descendants);
-	      }
-	    }
+	  source.area = function () {
+	    if (!data.polygon) return Number.MAX_VALUE; // worldwide
 
-	    return descendants;
-	  }
+	    var area = d3_geoArea({
+	      type: 'MultiPolygon',
+	      coordinates: [data.polygon]
+	    });
+	    return isNaN(area) ? 0 : area;
+	  };
 
-	  operation.available = function () {
-	    return getFilteredIdsToCopy().length > 0;
+	  source.imageryUsed = function () {
+	    return _name || source.id;
 	  };
 
-	  operation.disabled = function () {
-	    var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
+	  source.template = function (val) {
+	    if (!arguments.length) return _template;
 
-	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	      return 'too_large';
+	    if (source.id === 'custom' || source.id === 'Bing') {
+	      _template = val;
 	    }
 
-	    return false;
+	    return source;
 	  };
 
-	  operation.availableForKeypress = function () {
-	    var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
+	  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)
 
-	    return !selection || !selection.toString();
-	  };
+	    if (!source.type || source.id === 'custom') {
+	      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';
+	      }
+	    }
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.copy.' + disable, {
-	      n: selectedIDs.length
-	    }) : _t('operations.copy.description', {
-	      n: selectedIDs.length
-	    });
-	  };
+	    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;
+	        };
 
-	  operation.annotation = function () {
-	    return _t('operations.copy.annotation', {
-	      n: selectedIDs.length
-	    });
-	  };
+	        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 _point;
+	        switch (source.projection) {
+	          case 'EPSG:4326':
+	            return {
+	              x: lon * 180 / Math.PI,
+	              y: lat * 180 / Math.PI
+	            };
 
-	  operation.point = function (val) {
-	    _point = val;
-	    return operation;
-	  };
+	          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]
+	            };
+	        }
+	      };
 
-	  operation.id = 'copy';
-	  operation.keys = [uiCmd('⌘C')];
-	  operation.title = _t('operations.copy.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	      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;
 
-	function operationDisconnect(context, selectedIDs) {
-	  var _vertexIDs = [];
-	  var _wayIDs = [];
-	  var _otherIDs = [];
-	  var _actions = [];
-	  selectedIDs.forEach(function (id) {
-	    var entity = context.entity(id);
+	          case 'proj':
+	            return projection;
 
-	    if (entity.type === 'way') {
-	      _wayIDs.push(id);
-	    } else if (entity.geometry(context.graph()) === 'vertex') {
-	      _vertexIDs.push(id);
-	    } else {
-	      _otherIDs.push(id);
-	    }
-	  });
+	          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;
+	            }
 
-	  var _coords,
-	      _descriptionID = '',
-	      _annotationID = 'features';
+	          case 'w':
+	            return minXmaxY.x;
 
-	  var _disconnectingVertexIds = [];
-	  var _disconnectingWayIds = [];
+	          case 's':
+	            return maxXminY.y;
 
-	  if (_vertexIDs.length > 0) {
-	    // At the selected vertices, disconnect the selected ways, if any, else
-	    // disconnect all connected ways
-	    _disconnectingVertexIds = _vertexIDs;
+	          case 'n':
+	            return maxXminY.x;
 
-	    _vertexIDs.forEach(function (vertexID) {
-	      var action = actionDisconnect(vertexID);
+	          case 'e':
+	            return minXmaxY.y;
 
-	      if (_wayIDs.length > 0) {
-	        var waysIDsForVertex = _wayIDs.filter(function (wayID) {
-	          var way = context.entity(wayID);
-	          return way.nodes.indexOf(vertexID) !== -1;
-	        });
+	          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 = '';
 
-	        action.limitWays(waysIDsForVertex);
-	      }
+	        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();
+	        }
 
-	      _actions.push(action);
+	        return u;
+	      });
+	    } // these apply to any type..
 
-	      _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;
+	    result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+	      var subdomains = r.split(',');
+	      return subdomains[(coord[0] + coord[1]) % subdomains.length];
 	    });
-	    _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
+	    return result;
+	  };
 
-	    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);
-	    });
+	  source.validZoom = function (z) {
+	    return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+	  };
 
-	    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
+	  source.isLocatorOverlay = function () {
+	    return source.id === 'mapbox_locator_overlay';
+	  };
+	  /* hides a source from the list, but leaves it available for use */
 
-	    var sharedActions = [];
-	    var sharedNodes = []; // actions for connected nodes
 
-	    var unsharedActions = [];
-	    var unsharedNodes = [];
-	    nodes.forEach(function (node) {
-	      var action = actionDisconnect(node.id).limitWays(_wayIDs);
+	  source.isHidden = function () {
+	    return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+	  };
 
-	      if (action.disabled(context.graph()) !== 'not_connected') {
-	        var count = 0;
+	  source.copyrightNotices = function () {};
 
-	        for (var i in ways) {
-	          var way = ways[i];
+	  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);
+	  };
 
-	          if (way.nodes.indexOf(node.id) !== -1) {
-	            count += 1;
-	          }
+	  return source;
+	}
 
-	          if (count > 1) break;
-	        }
+	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
 
-	        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.';
+	  var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-	    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;
-	      });
+	  /*
+	  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
+	  */
 
-	      if (_wayIDs.length === 1) {
-	        _descriptionID += context.graph().geometry(_wayIDs[0]);
-	      } else {
-	        _descriptionID += 'separate';
-	      }
-	    }
-	  }
+	  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 _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
+	    var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339
 
-	  var operation = function operation() {
-	    context.perform(function (graph) {
-	      return _actions.reduce(function (graph, action) {
-	        return action(graph);
-	      }, graph);
-	    }, operation.annotation());
-	    context.validator().validate();
-	  };
+	    var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]
 
-	  operation.relatedEntityIds = function () {
-	    if (_vertexIDs.length) {
-	      return _disconnectingWayIds;
+	    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");
 	    }
 
-	    return _disconnectingVertexIds;
-	  };
+	    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 */
+	  });
 
-	  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;
+	  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;
 	      });
-	    })) return false;
-	    return true;
+	    }).map(function (provider) {
+	      return provider.attribution;
+	    }).join(', ');
 	  };
 
-	  operation.disabled = function () {
-	    var reason;
+	  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
 
-	    for (var actionIndex in _actions) {
-	      reason = _actions[actionIndex].disabled(context.graph());
-	      if (reason) return reason;
-	    }
+	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+	    if (inflight[tileID]) return;
 
-	    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';
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
 	    }
 
-	    return false;
-
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    }
 
-	      if (osm) {
-	        var missing = _coords.filter(function (loc) {
-	          return !osm.isDataLoaded(loc);
-	        });
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
 
-	        if (missing.length) {
-	          missing.forEach(function (loc) {
-	            context.loadTileAtLoc(loc);
-	          });
-	          return true;
-	        }
+	      if (!result) {
+	        throw new Error('Unknown Error');
 	      }
 
-	      return false;
-	    }
+	      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);
+	    });
 	  };
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
+	  bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	  return bing;
+	};
 
-	    if (disable) {
-	      return _t('operations.disconnect.' + disable);
-	    }
+	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';
+	  }
 
-	    return _t('operations.disconnect.description.' + _descriptionID);
-	  };
+	  var esri = rendererBackgroundSource(data);
+	  var cache = {};
+	  var inflight = {};
 
-	  operation.annotation = function () {
-	    return _t('operations.disconnect.annotation.' + _annotationID);
-	  };
+	  var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+	  // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
-	  operation.id = 'disconnect';
-	  operation.keys = [_t('operations.disconnect.key')];
-	  operation.title = _t('operations.disconnect.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
 
-	function operationDowngrade(context, selectedIDs) {
-	  var _affectedFeatureCount = 0;
+	  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 _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
+	    var z = 20; // first generate a random url using the template
 
-	  var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
+	    var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-	  function downgradeTypeForEntityIDs(entityIds) {
-	    var downgradeType;
-	    _affectedFeatureCount = 0;
+	    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
 
-	    for (var i in entityIds) {
-	      var entityID = entityIds[i];
-	      var type = downgradeTypeForEntityID(entityID);
+	    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
 
-	      if (type) {
-	        _affectedFeatureCount += 1;
+	    d3_json(tilemapUrl).then(function (tilemap) {
+	      if (!tilemap) {
+	        throw new Error('Unknown Error');
+	      }
 
-	        if (downgradeType && type !== downgradeType) {
-	          if (downgradeType !== 'generic' && type !== 'generic') {
-	            downgradeType = 'building_address';
-	          } else {
-	            downgradeType = 'generic';
-	          }
-	        } else {
-	          downgradeType = type;
+	      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;
 	        }
-	      }
-	    }
+	      } // if any tiles are missing at level 20 we restrict maxZoom to 19
 
-	    return downgradeType;
-	  }
 
-	  function downgradeTypeForEntityID(entityID) {
-	    var graph = context.graph();
-	    var entity = graph.entity(entityID);
-	    var preset = _mainPresetIndex.match(entity, graph);
-	    if (!preset || preset.isFallback()) return null;
+	      esri.zoomExtent[1] = hasTiles ? 22 : 19;
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	    if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
-	      return key.match(/^addr:.{1,}/);
-	    })) {
-	      return 'address';
+	  esri.getMetadata = function (center, tileCoord, callback) {
+	    if (esri.id !== 'EsriWorldImagery') {
+	      // rest endpoint is not available for ESRI's "clarity" imagery
+	      return callback(null, {});
 	    }
 
-	    var geometry = entity.geometry(graph);
+	    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)
 
-	    if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
-	      return 'building';
-	    }
+	    var unknown = _t('info_panels.background.unknown');
+	    var vintage = {};
+	    var metadata = {};
+	    if (inflight[tileID]) return; // build up query using the layer appropriate to the current zoom
 
-	    if (geometry === 'vertex' && Object.keys(entity.tags).length) {
-	      return 'generic';
+	    var url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/4/query';
+	    url += '?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
 	    }
 
-	    return null;
-	  }
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    }
 
-	  var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-	  var addressKeysToKeep = ['source'];
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
+	      result = result.features.map(function (f) {
+	        return f.attributes;
+	      }).filter(function (a) {
+	        return a.MinMapLevel <= zoom && a.MaxMapLevel >= zoom;
+	      })[0];
 
-	  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
+	      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
 
-	        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;
-	          }
+	      var captureDate = localeDateString(result.SRC_DATE2);
+	      vintage = {
+	        start: captureDate,
+	        end: captureDate,
+	        range: captureDate
+	      };
+	      metadata = {
+	        vintage: vintage,
+	        source: clean(result.NICE_NAME),
+	        description: clean(result.NICE_DESC),
+	        resolution: clean(+parseFloat(result.SRC_RES).toFixed(4)),
+	        accuracy: clean(+parseFloat(result.SRC_ACC).toFixed(4))
+	      }; // append units - meters
 
-	          if (type !== 'generic' && key.match(/^addr:.{1,}/)) continue;
-	          delete tags[key];
-	        }
+	      if (isFinite(metadata.resolution)) {
+	        metadata.resolution += ' m';
+	      }
 
-	        graph = actionChangeTags(entityID, tags)(graph);
+	      if (isFinite(metadata.accuracy)) {
+	        metadata.accuracy += ' m';
 	      }
 
-	      return graph;
-	    }, operation.annotation());
-	    context.validator().validate(); // refresh the select mode to enable the delete operation
+	      cache[tileID].metadata = metadata;
+	      if (callback) callback(null, metadata);
+	    })["catch"](function (err) {
+	      delete inflight[tileID];
+	      if (callback) callback(err.message);
+	    });
 
-	    context.enter(modeSelect(context, selectedIDs));
+	    function clean(val) {
+	      return String(val).trim() || unknown;
+	    }
 	  };
 
-	  operation.available = function () {
-	    return _downgradeType;
-	  };
+	  return esri;
+	};
 
-	  operation.disabled = function () {
-	    if (selectedIDs.some(hasWikidataTag)) {
-	      return 'has_wikidata_tag';
-	    }
+	rendererBackgroundSource.None = function () {
+	  var source = rendererBackgroundSource({
+	    id: 'none',
+	    template: ''
+	  });
 
-	    return false;
+	  source.name = function () {
+	    return _t('background.none');
+	  };
 
-	    function hasWikidataTag(id) {
-	      var entity = context.entity(id);
-	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	    }
+	  source.label = function () {
+	    return _t.html('background.none');
 	  };
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+	  source.imageryUsed = function () {
+	    return null;
 	  };
 
-	  operation.annotation = function () {
-	    var suffix;
+	  source.area = function () {
+	    return -1; // sources in background pane are sorted by area
+	  };
 
-	    if (_downgradeType === 'building_address') {
-	      suffix = 'generic';
-	    } else {
-	      suffix = _downgradeType;
-	    }
+	  return source;
+	};
 
-	    return _t('operations.downgrade.annotation.' + suffix, {
-	      n: _affectedFeatureCount
-	    });
+	rendererBackgroundSource.Custom = function (template) {
+	  var source = rendererBackgroundSource({
+	    id: 'custom',
+	    template: template
+	  });
+
+	  source.name = function () {
+	    return _t('background.custom');
 	  };
 
-	  operation.id = 'downgrade';
-	  operation.keys = [uiCmd('⌫')];
-	  operation.title = _t('operations.downgrade.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	  source.label = function () {
+	    return _t.html('background.custom');
+	  };
 
-	function operationExtract(context, selectedIDs) {
-	  var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  source.imageryUsed = function () {
+	    // sanitize personal connection tokens - #6801
+	    var cleaned = source.template(); // from query string parameters
 
-	  var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
-	    return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-	  }).filter(Boolean));
+	    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
 
-	  var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-	  var _extent;
+	    cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	    return 'Custom (' + cleaned + ' )';
+	  };
 
-	  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;
+	  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;
 
-	    if (entity.type !== 'node') {
-	      var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
+	  var _cache = {};
 
-	      if (preset.geometry.indexOf('point') === -1) return null;
-	    }
+	  var _tileOrigin;
 
-	    _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
-	    return actionExtract(entityID);
-	  }).filter(Boolean);
+	  var _zoom;
 
-	  var operation = function operation() {
-	    var combinedAction = function combinedAction(graph) {
-	      _actions.forEach(function (action) {
-	        graph = action(graph);
-	      });
+	  var _source;
 
-	      return graph;
-	    };
+	  function tileSizeAtZoom(d, z) {
+	    var EPSILON = 0.002; // close seams
 
-	    context.perform(combinedAction, operation.annotation()); // do the extract
+	    return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+	  }
 
-	    var extractedNodeIDs = _actions.map(function (action) {
-	      return action.getExtractedNodeID();
-	    });
+	  function atZoom(t, distance) {
+	    var power = Math.pow(2, distance);
+	    return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+	  }
 
-	    context.enter(modeSelect(context, extractedNodeIDs));
-	  };
+	  function lookUp(d) {
+	    for (var up = -1; up > -d[2]; up--) {
+	      var tile = atZoom(d, up);
 
-	  operation.available = function () {
-	    return _actions.length && selectedIDs.length === _actions.length;
-	  };
+	      if (_cache[_source.url(tile)] !== false) {
+	        return tile;
+	      }
+	    }
+	  }
 
-	  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 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 false;
-	  };
+	    return o;
+	  }
 
-	  operation.tooltip = function () {
-	    var disableReason = operation.disabled();
+	  function addSource(d) {
+	    d.push(_source.url(d));
+	    return d;
+	  } // Update tiles based on current state of `projection`.
 
-	    if (disableReason) {
-	      return _t('operations.extract.' + disableReason + '.' + _amount);
+
+	  function background(selection) {
+	    _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    var pixelOffset;
+
+	    if (_source) {
+	      pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
 	    } else {
-	      return _t('operations.extract.description.' + _geometryID + '.' + _amount);
+	      pixelOffset = [0, 0];
 	    }
-	  };
 
-	  operation.annotation = function () {
-	    return _t('operations.extract.annotation', {
-	      n: selectedIDs.length
-	    });
-	  };
-
-	  operation.id = 'extract';
-	  operation.keys = [_t('operations.extract.key')];
-	  operation.title = _t('operations.extract.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	    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 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
+	  function render(selection) {
+	    if (!_source) return;
+	    var requests = [];
+	    var showDebug = context.getDebug('tile') && !_source.overlay;
 
-	    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;
-	  }
+	    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
 
-	  var operation = function operation() {
-	    if (operation.disabled()) return;
-	    context.perform(_action, operation.annotation());
-	    context.validator().validate();
-	    var resultIDs = selectedIDs.filter(context.hasEntity);
+	        requests.push(d);
 
-	    if (resultIDs.length > 1) {
-	      var interestingIDs = resultIDs.filter(function (id) {
-	        return context.entity(id).hasInterestingTags();
+	        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;
 	      });
-	      if (interestingIDs.length) resultIDs = interestingIDs;
 	    }
 
-	    context.enter(modeSelect(context, resultIDs));
-	  };
+	    function load(d3_event, d) {
+	      _cache[d[3]] = true;
+	      select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+	      render(selection);
+	    }
 
-	  operation.available = function () {
-	    return selectedIDs.length >= 2;
-	  };
+	    function error(d3_event, d) {
+	      _cache[d[3]] = false;
+	      select(this).on('error', null).on('load', null).remove();
+	      render(selection);
+	    }
 
-	  operation.disabled = function () {
-	    var actionDisabled = _action.disabled(context.graph());
+	    function imageTransform(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-	    if (actionDisabled) return actionDisabled;
-	    var osm = context.connection();
+	      var scale = tileSizeAtZoom(d, _zoom);
+	      return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+	    }
 
-	    if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-	      return 'too_many_vertices';
+	    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];
 	    }
 
-	    return false;
-	  };
+	    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)
 
-	  operation.tooltip = function () {
-	    var disabled = operation.disabled();
 
-	    if (disabled) {
-	      if (disabled === 'restriction') {
-	        return _t('operations.merge.restriction', {
-	          relation: _mainPresetIndex.item('type/restriction').name()
-	        });
+	    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);
+
+	      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('alt', '').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();
 
-	      return _t('operations.merge.' + disabled);
+	    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) {
+	          if (result && result.vintage && result.vintage.range) {
+	            span.text(result.vintage.range);
+	          } else {
+	            span.html(_t.html('info_panels.background.vintage') + ': ' + _t.html('info_panels.background.unknown'));
+	          }
+	        });
+	      });
 	    }
+	  }
 
-	    return _t('operations.merge.description');
+	  background.projection = function (val) {
+	    if (!arguments.length) return _projection;
+	    _projection = val;
+	    return background;
 	  };
 
-	  operation.annotation = function () {
-	    return _t('operations.merge.annotation', {
-	      n: selectedIDs.length
-	    });
+	  background.dimensions = function (val) {
+	    if (!arguments.length) return tiler.size();
+	    tiler.size(val);
+	    return background;
 	  };
 
-	  operation.id = 'merge';
-	  operation.keys = [_t('operations.merge.key')];
-	  operation.title = _t('operations.merge.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
+	  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;
 	}
 
-	function operationPaste(context) {
-	  var _pastePoint;
+	var _imageryIndex = null;
+	function rendererBackground(context) {
+	  var dispatch = dispatch$8('change');
+	  var detected = utilDetect();
+	  var baseLayer = rendererTileLayer(context).projection(context.projection);
+	  var _checkedBlocklists = [];
+	  var _isValid = true;
+	  var _overlayLayers = [];
+	  var _brightness = 1;
+	  var _contrast = 1;
+	  var _saturation = 1;
+	  var _sharpness = 1;
 
-	  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 ensureImageryIndex() {
+	    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
 
-	    for (var id in copies) {
-	      var oldEntity = oldGraph.entity(id);
-	      var newEntity = copies[id];
+	      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]] ]
 
-	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
+	        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'
 
-	      var parents = context.graph().parentWays(newEntity);
-	      var parentCopied = parents.some(function (parent) {
-	        return originals.has(parent.id);
-	      });
+	      _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-	      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
 
+	      var template = corePreferences('background-custom-template') || '';
+	      var custom = rendererBackgroundSource.Custom(template);
 
-	    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
+	      _imageryIndex.backgrounds.unshift(custom);
 
-	    context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-	    context.enter(modeSelect(context, newIDs));
-	  };
+	      return _imageryIndex;
+	    });
+	  }
 
-	  operation.point = function (val) {
-	    _pastePoint = val;
-	    return operation;
-	  };
+	  function background(selection) {
+	    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
 
-	  operation.available = function () {
-	    return context.mode().id === 'browse';
-	  };
+	    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
 
-	  operation.disabled = function () {
-	    return !context.copyIDs().length;
-	  };
 
-	  operation.tooltip = function () {
-	    var oldGraph = context.copyGraph();
-	    var ids = context.copyIDs();
+	    var sources = background.sources(context.map().extent());
+	    var wasValid = _isValid;
+	    _isValid = !!sources.filter(function (d) {
+	      return d === currSource;
+	    }).length;
 
-	    if (!ids.length) {
-	      return _t('operations.paste.nothing_copied');
+	    if (wasValid !== _isValid) {
+	      // change in valid status
+	      background.updateImagery();
 	    }
 
-	    return _t('operations.paste.description', {
-	      feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
-	      n: ids.length
-	    });
-	  };
-
-	  operation.annotation = function () {
-	    var ids = context.copyIDs();
-	    return _t('operations.paste.annotation', {
-	      n: ids.length
-	    });
-	  };
-
-	  operation.id = 'paste';
-	  operation.keys = [uiCmd('⌘V')];
-	  operation.title = _t('operations.paste.title');
-	  return operation;
-	}
+	    var baseFilter = '';
 
-	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();
-	  };
+	    if (detected.cssfilters) {
+	      if (_brightness !== 1) {
+	        baseFilter += " brightness(".concat(_brightness, ")");
+	      }
 
-	  function actions(situation) {
-	    return selectedIDs.map(function (entityID) {
-	      var entity = context.hasEntity(entityID);
-	      if (!entity) return null;
+	      if (_contrast !== 1) {
+	        baseFilter += " contrast(".concat(_contrast, ")");
+	      }
 
-	      if (situation === 'toolbar') {
-	        if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+	      if (_saturation !== 1) {
+	        baseFilter += " saturate(".concat(_saturation, ")");
 	      }
 
-	      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);
-	  }
+	      if (_sharpness < 1) {
+	        // gaussian blur
+	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+	        baseFilter += " blur(".concat(blur, "px)");
+	      }
+	    }
 
-	  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';
-	  }
+	    var base = selection.selectAll('.layer-background').data([0]);
+	    base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
-	  operation.available = function (situation) {
-	    return actions(situation).length > 0;
-	  };
+	    if (detected.cssfilters) {
+	      base.style('filter', baseFilter || null);
+	    } else {
+	      base.style('opacity', _brightness);
+	    }
 
-	  operation.disabled = function () {
-	    return false;
-	  };
+	    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 = '';
 
-	  operation.tooltip = function () {
-	    return _t('operations.reverse.description.' + reverseTypeID());
-	  };
+	    if (detected.cssfilters && _sharpness > 1) {
+	      // apply unsharp mask
+	      mixBlendMode = 'overlay';
+	      maskFilter = 'saturate(0) blur(3px) invert(1)';
+	      var contrast = _sharpness - 1;
+	      maskFilter += " contrast(".concat(contrast, ")");
+	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
+	      maskFilter += " brightness(".concat(brightness, ")");
+	    }
 
-	  operation.annotation = function () {
-	    var acts = actions();
-	    return _t('operations.reverse.annotation.' + reverseTypeID(), {
-	      n: acts.length
+	    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);
+	    });
+	  }
 
-	  operation.id = 'reverse';
-	  operation.keys = [_t('operations.reverse.key')];
-	  operation.title = _t('operations.reverse.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	  background.updateImagery = function () {
+	    var currSource = baseLayer.source();
+	    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(',');
 
-	function operationSplit(context, selectedIDs) {
-	  var _vertexIds = selectedIDs.filter(function (id) {
-	    return context.graph().geometry(id) === 'vertex';
-	  });
+	    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;
 
-	  var _selectedWayIds = selectedIDs.filter(function (id) {
-	    var entity = context.graph().hasEntity(id);
-	    return entity && entity.type === 'way';
-	  });
+	    if (id === 'custom') {
+	      id = "custom:".concat(currSource.template());
+	    }
 
-	  var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
+	    if (id) {
+	      hash.background = id;
+	    } else {
+	      delete hash.background;
+	    }
 
-	  var _action = actionSplit(_vertexIds);
+	    if (o) {
+	      hash.overlays = o;
+	    } else {
+	      delete hash.overlays;
+	    }
 
-	  var _ways = [];
-	  var _geometry = 'feature';
-	  var _waysAmount = 'single';
+	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+	      hash.offset = "".concat(x, ",").concat(y);
+	    } else {
+	      delete hash.offset;
+	    }
 
-	  var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
+	    if (!window.mocha) {
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
 
-	  if (_isAvailable) {
-	    if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
-	    _ways = _action.ways(context.graph());
-	    var geometries = {};
+	    var imageryUsed = [];
+	    var photoOverlaysUsed = [];
+	    var currUsed = currSource.imageryUsed();
 
-	    _ways.forEach(function (way) {
-	      geometries[way.geometry(context.graph())] = true;
+	    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());
 	    });
 
-	    if (Object.keys(geometries).length === 1) {
-	      _geometry = Object.keys(geometries)[0];
+	    var dataLayer = context.layers().layer('data');
+
+	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+	      imageryUsed.push(dataLayer.getSrc());
 	    }
 
-	    _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
-	  }
+	    var photoOverlayLayers = {
+	      streetside: 'Bing Streetside',
+	      mapillary: 'Mapillary Images',
+	      'mapillary-map-features': 'Mapillary Map Features',
+	      'mapillary-signs': 'Mapillary Signs',
+	      kartaview: 'KartaView Images'
+	    };
 
-	  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
+	    for (var layerID in photoOverlayLayers) {
+	      var layer = context.layers().layer(layerID);
 
-	    var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
-	      // filter out relations that may have had member additions
-	      return context.entity(id).type === 'way';
-	    }));
+	      if (layer && layer.enabled()) {
+	        photoOverlaysUsed.push(layerID);
+	        imageryUsed.push(photoOverlayLayers[layerID]);
+	      }
+	    }
 
-	    context.enter(modeSelect(context, idsToSelect));
+	    context.history().imageryUsed(imageryUsed);
+	    context.history().photoOverlaysUsed(photoOverlaysUsed);
 	  };
 
-	  operation.relatedEntityIds = function () {
-	    return _selectedWayIds.length ? [] : _ways.map(function (way) {
-	      return way.id;
+	  background.sources = function (extent, zoom, includeCurrent) {
+	    if (!_imageryIndex) return []; // called before init()?
+
+	    var visible = {};
+	    (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
+	      return visible[d.id] = true;
 	    });
-	  };
+	    var currSource = baseLayer.source(); // Recheck blocked sources only if we detect new blocklists pulled from the OSM API.
 
-	  operation.available = function () {
-	    return _isAvailable;
-	  };
+	    var osm = context.connection();
+	    var blocklists = osm && osm.imageryBlocklists() || [];
+	    var blocklistChanged = blocklists.length !== _checkedBlocklists.length || blocklists.some(function (regex, index) {
+	      return String(regex) !== _checkedBlocklists[index];
+	    });
 
-	  operation.disabled = function () {
-	    var reason = _action.disabled(context.graph());
+	    if (blocklistChanged) {
+	      _imageryIndex.backgrounds.forEach(function (source) {
+	        source.isBlocked = blocklists.some(function (regex) {
+	          return regex.test(source.template());
+	        });
+	      });
 
-	    if (reason) {
-	      return reason;
-	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	      return 'connected_to_hidden';
+	      _checkedBlocklists = blocklists.map(function (regex) {
+	        return String(regex);
+	      });
 	    }
 
-	    return false;
-	  };
+	    return _imageryIndex.backgrounds.filter(function (source) {
+	      if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    if (disable) return _t('operations.split.' + disable);
-	    return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
-	  };
+	      if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
 
-	  operation.annotation = function () {
-	    return _t('operations.split.annotation.' + _geometry, {
-	      n: _ways.length
-	    });
-	  };
+	      if (!source.polygon) return true; // always include imagery with worldwide coverage
 
-	  operation.id = 'split';
-	  operation.keys = [_t('operations.split.key')];
-	  operation.title = _t('operations.split.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	      if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
 
-	function operationStraighten(context, selectedIDs) {
-	  var _wayIDs = selectedIDs.filter(function (id) {
-	    return id.charAt(0) === 'w';
-	  });
+	      return visible[source.id]; // include imagery visible in given extent
+	    });
+	  };
 
-	  var _nodeIDs = selectedIDs.filter(function (id) {
-	    return id.charAt(0) === 'n';
-	  });
+	  background.dimensions = function (val) {
+	    if (!val) return;
+	    baseLayer.dimensions(val);
 
-	  var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
+	    _overlayLayers.forEach(function (layer) {
+	      return layer.dimensions(val);
+	    });
+	  };
 
-	  var _nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  background.baseLayerSource = function (d) {
+	    if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-	  var _coords = _nodes.map(function (n) {
-	    return n.loc;
-	  });
+	    var osm = context.connection();
+	    if (!osm) return background;
+	    var blocklists = osm.imageryBlocklists();
+	    var template = d.template();
+	    var fail = false;
+	    var tested = 0;
+	    var regex;
 
-	  var _extent = utilTotalExtent(selectedIDs, context.graph());
+	    for (var i = 0; i < blocklists.length; i++) {
+	      regex = blocklists[i];
+	      fail = regex.test(template);
+	      tested++;
+	      if (fail) break;
+	    } // ensure at least one test was run.
 
-	  var _action = chooseAction();
 
-	  var _geometry;
+	    if (!tested) {
+	      regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	      fail = regex.test(template);
+	    }
 
-	  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 = [];
+	    baseLayer.source(!fail ? d : background.findSource('none'));
+	    dispatch.call('change');
+	    background.updateImagery();
+	    return background;
+	  };
 
-	      for (var i = 0; i < selectedIDs.length; i++) {
-	        var entity = context.entity(selectedIDs[i]);
+	  background.findSource = function (id) {
+	    if (!id || !_imageryIndex) return null; // called before init()?
 
-	        if (entity.type === 'node') {
-	          continue;
-	        } else if (entity.type !== 'way' || entity.isClosed()) {
-	          return null; // exit early, can't straighten these
-	        }
+	    return _imageryIndex.backgrounds.find(function (d) {
+	      return d.id && d.id === id;
+	    });
+	  };
 
-	        startNodeIDs.push(entity.first());
-	        endNodeIDs.push(entity.last());
-	      } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
+	  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;
+	    });
+	  };
 
-	      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)
+	  background.overlayLayerSources = function () {
+	    return _overlayLayers.map(function (layer) {
+	      return layer.source();
+	    });
+	  };
 
-	      if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
+	  background.toggleOverlayLayer = function (d) {
+	    var layer;
 
-	      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
+	    for (var i = 0; i < _overlayLayers.length; i++) {
+	      layer = _overlayLayers[i];
 
-	      if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
+	      if (layer.source() === d) {
+	        _overlayLayers.splice(i, 1);
 
-	      if (_nodeIDs.length) {
-	        // If we're only straightenting between two points, we only need that extent visible
-	        _extent = utilTotalExtent(_nodeIDs, context.graph());
+	        dispatch.call('change');
+	        background.updateImagery();
+	        return;
 	      }
-
-	      _geometry = 'line';
-	      return actionStraightenWay(selectedIDs, context.projection);
 	    }
 
-	    return null;
-	  }
+	    layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
-	  function operation() {
-	    if (!_action) return;
-	    context.perform(_action, operation.annotation());
-	    window.setTimeout(function () {
-	      context.validator().validate();
-	    }, 300); // after any transition
-	  }
+	    _overlayLayers.push(layer);
 
-	  operation.available = function () {
-	    return Boolean(_action);
+	    dispatch.call('change');
+	    background.updateImagery();
 	  };
 
-	  operation.disabled = function () {
-	    var reason = _action.disabled(context.graph());
+	  background.nudge = function (d, zoom) {
+	    var currSource = baseLayer.source();
 
-	    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';
+	    if (currSource) {
+	      currSource.nudge(d, zoom);
+	      dispatch.call('change');
+	      background.updateImagery();
 	    }
 
-	    return false;
-
-	    function someMissing() {
-	      if (context.inIntro()) return false;
-	      var osm = context.connection();
+	    return background;
+	  };
 
-	      if (osm) {
-	        var missing = _coords.filter(function (loc) {
-	          return !osm.isDataLoaded(loc);
-	        });
+	  background.offset = function (d) {
+	    var currSource = baseLayer.source();
 
-	        if (missing.length) {
-	          missing.forEach(function (loc) {
-	            context.loadTileAtLoc(loc);
-	          });
-	          return true;
-	        }
-	      }
+	    if (!arguments.length) {
+	      return currSource && currSource.offset() || [0, 0];
+	    }
 
-	      return false;
+	    if (currSource) {
+	      currSource.offset(d);
+	      dispatch.call('change');
+	      background.updateImagery();
 	    }
+
+	    return background;
 	  };
 
-	  operation.tooltip = function () {
-	    var disable = operation.disabled();
-	    return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+	  background.brightness = function (d) {
+	    if (!arguments.length) return _brightness;
+	    _brightness = d;
+	    if (context.mode()) dispatch.call('change');
+	    return background;
 	  };
 
-	  operation.annotation = function () {
-	    return _t('operations.straighten.annotation.' + _geometry, {
-	      n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
-	    });
+	  background.contrast = function (d) {
+	    if (!arguments.length) return _contrast;
+	    _contrast = d;
+	    if (context.mode()) dispatch.call('change');
+	    return background;
 	  };
 
-	  operation.id = 'straighten';
-	  operation.keys = [_t('operations.straighten.key')];
-	  operation.title = _t('operations.straighten.title');
-	  operation.behavior = behaviorOperation(context).which(operation);
-	  return operation;
-	}
+	  background.saturation = function (d) {
+	    if (!arguments.length) return _saturation;
+	    _saturation = d;
+	    if (context.mode()) dispatch.call('change');
+	    return background;
+	  };
 
-	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
-	});
+	  background.sharpness = function (d) {
+	    if (!arguments.length) return _sharpness;
+	    _sharpness = d;
+	    if (context.mode()) dispatch.call('change');
+	    return background;
+	  };
 
-	var _relatedParent;
+	  var _loadPromise;
 
-	function modeSelect(context, selectedIDs) {
-	  var mode = {
-	    id: 'select',
-	    button: 'browse'
-	  };
-	  var keybinding = utilKeybinding('select');
+	  background.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
 
-	  var _breatheBehavior = behaviorBreathe();
+	    function parseMapParams(qmap) {
+	      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
+	    }
 
-	  var _modeDragNode = modeDragNode(context);
+	    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;
 
-	  var _selectBehavior;
+	      if (!requested && extent) {
+	        best = background.sources(extent).find(function (s) {
+	          return s.best();
+	        });
+	      } // Decide which background layer to display
 
-	  var _behaviors = [];
-	  var _operations = [];
-	  var _newFeature = false;
-	  var _follow = false;
 
-	  function singular() {
-	    if (selectedIDs && selectedIDs.length === 1) {
-	      return context.hasEntity(selectedIDs[0]);
-	    }
-	  }
+	      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'));
+	      }
 
-	  function selectedEntities() {
-	    return selectedIDs.map(function (id) {
-	      return context.hasEntity(id);
-	    }).filter(Boolean);
-	  }
+	      var locator = imageryIndex.backgrounds.find(function (d) {
+	        return d.overlay && d["default"];
+	      });
 
-	  function checkSelectedIDs() {
-	    var ids = [];
+	      if (locator) {
+	        background.toggleOverlayLayer(locator);
+	      }
 
-	    if (Array.isArray(selectedIDs)) {
-	      ids = selectedIDs.filter(function (id) {
-	        return context.hasEntity(id);
+	      var overlays = (hash.overlays || '').split(',');
+	      overlays.forEach(function (overlay) {
+	        overlay = background.findSource(overlay);
+
+	        if (overlay) {
+	          background.toggleOverlayLayer(overlay);
+	        }
 	      });
-	    }
 
-	    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;
-	    }
+	      if (hash.gpx) {
+	        var gpx = context.layers().layer('data');
 
-	    selectedIDs = ids;
-	    return true;
-	  } // find the common parent ways for nextVertex, previousVertex
+	        if (gpx) {
+	          gpx.url(hash.gpx, '.gpx');
+	        }
+	      }
 
+	      if (hash.offset) {
+	        var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+	          return !isNaN(n) && n;
+	        });
 
-	  function commonParents() {
-	    var graph = context.graph();
-	    var commonParents = [];
+	        if (offset.length === 2) {
+	          background.offset(geoMetersToOffset(offset));
+	        }
+	      }
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
+
+	  return utilRebind(background, dispatch, 'on');
+	}
+
+	function rendererFeatures(context) {
+	  var dispatch = dispatch$8('change', 'redraw');
+	  var features = utilRebind({}, dispatch, '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 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 = {};
 
-	    for (var i = 0; i < selectedIDs.length; i++) {
-	      var entity = context.hasEntity(selectedIDs[i]);
+	  function update() {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
+	      var disabled = features.disabled();
 
-	      if (!entity || entity.geometry(graph) !== 'vertex') {
-	        return []; // selection includes some not vertices
+	      if (disabled.length) {
+	        hash.disable_features = disabled.join(',');
+	      } else {
+	        delete hash.disable_features;
 	      }
 
-	      var currParents = graph.parentWays(entity).map(function (w) {
-	        return w.id;
-	      });
+	      window.location.replace('#' + utilQsString(hash, true));
+	      corePreferences('disabled-features', disabled.join(','));
+	    }
 
-	      if (!commonParents.length) {
-	        commonParents = currParents;
-	        continue;
-	      }
+	    _hidden = features.hidden();
+	    dispatch.call('change');
+	    dispatch.call('redraw');
+	  }
 
-	      commonParents = utilArrayIntersection(commonParents, currParents);
+	  function defineRule(k, filter, max) {
+	    var isEnabled = true;
 
-	      if (!commonParents.length) {
-	        return [];
-	      }
-	    }
+	    _keys.push(k);
 
-	    return commonParents;
+	    _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;
+	      }
+	    };
 	  }
 
-	  function singularParent() {
-	    var parents = commonParents();
+	  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..
 
-	    if (!parents || parents.length === 0) {
-	      _relatedParent = null;
-	      return null;
-	    } // relatedParent is used when we visit a vertex with multiple
-	    // parents, and we want to remember which parent line we started on.
+	  defineRule('past_future', function isPastFuture(tags) {
+	    if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+	      return false;
+	    }
 
+	    var strings = Object.keys(tags);
 
-	    if (parents.length === 1) {
-	      _relatedParent = parents[0]; // remember this parent for later
+	    for (var i = 0; i < strings.length; i++) {
+	      var s = strings[i];
 
-	      return _relatedParent;
+	      if (past_futures[s] || past_futures[tags[s]]) {
+	        return true;
+	      }
 	    }
 
-	    if (parents.indexOf(_relatedParent) !== -1) {
-	      return _relatedParent; // prefer the previously seen parent
-	    }
+	    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`
 
-	    return parents[0];
-	  }
+	  defineRule('others', function isOther(tags, geometry) {
+	    return geometry === 'line' || geometry === 'area';
+	  });
 
-	  mode.selectedIDs = function (val) {
-	    if (!arguments.length) return selectedIDs;
-	    selectedIDs = val;
-	    return mode;
+	  features.features = function () {
+	    return _rules;
 	  };
 
-	  mode.zoomToSelected = function () {
-	    context.map().zoomToEase(selectedEntities());
+	  features.keys = function () {
+	    return _keys;
 	  };
 
-	  mode.newFeature = function (val) {
-	    if (!arguments.length) return _newFeature;
-	    _newFeature = val;
-	    return mode;
-	  };
+	  features.enabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].enabled;
+	      });
+	    }
 
-	  mode.selectBehavior = function (val) {
-	    if (!arguments.length) return _selectBehavior;
-	    _selectBehavior = val;
-	    return mode;
+	    return _rules[k] && _rules[k].enabled;
 	  };
 
-	  mode.follow = function (val) {
-	    if (!arguments.length) return _follow;
-	    _follow = val;
-	    return mode;
+	  features.disabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return !_rules[k].enabled;
+	      });
+	    }
+
+	    return _rules[k] && !_rules[k].enabled;
 	  };
 
-	  function loadOperations() {
-	    _operations.forEach(function (operation) {
-	      if (operation.behavior) {
-	        context.uninstall(operation.behavior);
-	      }
-	    });
+	  features.hidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].hidden();
+	      });
+	    }
 
-	    _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();
-	    });
+	    return _rules[k] && _rules[k].hidden();
+	  };
 
-	    _operations.forEach(function (operation) {
-	      if (operation.behavior) {
-	        context.install(operation.behavior);
-	      }
-	    }); // remove any displayed menu
+	  features.autoHidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].autoHidden();
+	      });
+	    }
 
+	    return _rules[k] && _rules[k].autoHidden();
+	  };
 
-	    context.ui().closeEditMenu();
-	  }
+	  features.enable = function (k) {
+	    if (_rules[k] && !_rules[k].enabled) {
+	      _rules[k].enable();
 
-	  mode.operations = function () {
-	    return _operations;
+	      update();
+	    }
 	  };
 
-	  mode.enter = function () {
-	    if (!checkSelectedIDs()) return;
-	    context.features().forceVisible(selectedIDs);
-
-	    _modeDragNode.restoreSelectedIDs(selectedIDs);
+	  features.enableAll = function () {
+	    var didEnable = false;
 
-	    loadOperations();
+	    for (var k in _rules) {
+	      if (!_rules[k].enabled) {
+	        didEnable = true;
 
-	    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];
+	        _rules[k].enable();
+	      }
 	    }
 
-	    _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(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'], 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
+	    if (didEnable) update();
+	  };
 
-	      selectElements();
-	    }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
-	    context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
-	      selectElements();
+	  features.disable = function (k) {
+	    if (_rules[k] && _rules[k].enabled) {
+	      _rules[k].disable();
 
-	      _breatheBehavior.restartIfNeeded(context.surface());
-	    });
-	    context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
-	    selectElements();
+	      update();
+	    }
+	  };
 
-	    if (_follow) {
-	      var extent = geoExtent();
-	      var graph = context.graph();
-	      selectedIDs.forEach(function (id) {
-	        var entity = context.entity(id);
+	  features.disableAll = function () {
+	    var didDisable = 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
+	    for (var k in _rules) {
+	      if (_rules[k].enabled) {
+	        didDisable = true;
 
-	      _follow = false;
+	        _rules[k].disable();
+	      }
 	    }
 
-	    function nudgeSelection(delta) {
-	      return function () {
-	        // prevent nudging during low zoom selection
-	        if (!context.map().withinEditableZoom()) return;
-	        var moveOp = operationMove(context, selectedIDs);
+	    if (didDisable) update();
+	  };
 
-	        if (moveOp.disabled()) {
-	          context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
-	        } else {
-	          context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
-	          context.validator().validate();
-	        }
-	      };
+	  features.toggle = function (k) {
+	    if (_rules[k]) {
+	      (function (f) {
+	        return f.enabled ? f.disable() : f.enable();
+	      })(_rules[k]);
+
+	      update();
 	    }
+	  };
 
-	    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
+	  features.resetStats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    }
 
-	        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.
+	    dispatch.call('change');
+	  };
 
-	        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';
-	          }
+	  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;
 
-	          return false;
+	    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..
 
-	          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);
-	          }
 
-	          function someMissing() {
-	            if (context.inIntro()) return false;
-	            var osm = context.connection();
+	    _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-	            if (osm) {
-	              var missing = nodes.filter(function (n) {
-	                return !osm.isDataLoaded(n.loc);
-	              });
+	    for (i = 0; i < entities.length; i++) {
+	      geometry = entities[i].geometry(resolver);
+	      matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-	              if (missing.length) {
-	                missing.forEach(function (loc) {
-	                  context.loadTileAtLoc(loc);
-	                });
-	                return true;
-	              }
-	            }
+	      for (j = 0; j < matches.length; j++) {
+	        _rules[matches[j]].count++;
+	      }
+	    }
 
-	            return false;
-	          }
+	    currHidden = features.hidden();
 
-	          function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	          }
-	        }
+	    if (currHidden !== _hidden) {
+	      _hidden = currHidden;
+	      needsRedraw = true;
+	      dispatch.call('change');
+	    }
 
-	        var disabled = scalingDisabled();
+	    return needsRedraw;
+	  };
 
-	        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();
-	        }
-	      };
+	  features.stats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _stats[_keys[i]] = _rules[_keys[i]].count;
 	    }
 
-	    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;
+	    return _stats;
+	  };
 
-	      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'));
-	      } else if (entity.type === 'midpoint') {
-	        context.perform(actionAddMidpoint({
-	          loc: entity.loc,
-	          edge: entity.edge
-	        }, osmNode()), _t('operations.add.annotation.vertex'));
-	      }
+	  features.clear = function (d) {
+	    for (var i = 0; i < d.length; i++) {
+	      features.clearEntity(d[i]);
 	    }
+	  };
 
-	    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);
-	      singularParent();
+	  features.clearEntity = function (entity) {
+	    delete _cache[osmEntity.key(entity)];
+	  };
 
-	      if (_relatedParent) {
-	        surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-	      }
+	  features.reset = function () {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	      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);
-	      }
-	    }
+	      _deferred["delete"](handle);
+	    });
+	    _cache = {};
+	  }; // only certain relations are worth checking
 
-	    function esc() {
-	      if (context.container().select('.combobox').size()) return;
-	      context.enter(modeBrowse(context));
-	    }
 
-	    function firstVertex(d3_event) {
-	      d3_event.preventDefault();
-	      var entity = singular();
-	      var parent = singularParent();
-	      var way;
+	  function relationShouldBeChecked(relation) {
+	    // multipolygon features have `area` geometry and aren't checked here
+	    return relation.tags.type === 'boundary';
+	  }
 
-	      if (entity && entity.type === 'way') {
-	        way = entity;
-	      } else if (parent) {
-	        way = context.entity(parent);
-	      }
+	  features.getMatches = function (entity, resolver, geometry) {
+	    if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+	    var ent = osmEntity.key(entity);
 
-	      if (way) {
-	        context.enter(modeSelect(context, [way.first()]).follow(true));
-	      }
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
 	    }
 
-	    function lastVertex(d3_event) {
-	      d3_event.preventDefault();
-	      var entity = singular();
-	      var parent = singularParent();
-	      var way;
-
-	      if (entity && entity.type === 'way') {
-	        way = entity;
-	      } else if (parent) {
-	        way = context.entity(parent);
-	      }
+	    if (!_cache[ent].matches) {
+	      var matches = {};
+	      var hasMatch = false;
 
-	      if (way) {
-	        context.enter(modeSelect(context, [way.last()]).follow(true));
-	      }
-	    }
+	      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,
 
-	    function previousVertex(d3_event) {
-	      d3_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 (entity.type === 'way') {
+	            var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-	      if (curr > 0) {
-	        index = curr - 1;
-	      } else if (way.isClosed()) {
-	        index = length - 2;
-	      }
+	            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 (index !== -1) {
-	        context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
-	      }
-	    }
+	              if (_cache[pkey] && _cache[pkey].matches) {
+	                matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-	    function nextVertex(d3_event) {
-	      d3_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;
+	                continue;
+	              }
+	            }
+	          }
+	        }
 
-	      if (curr < length - 1) {
-	        index = curr + 1;
-	      } else if (way.isClosed()) {
-	        index = 0;
+	        if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+	          matches[_keys[i]] = hasMatch = true;
+	        }
 	      }
 
-	      if (index !== -1) {
-	        context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
-	      }
+	      _cache[ent].matches = matches;
 	    }
 
-	    function nextParent(d3_event) {
-	      d3_event.preventDefault();
-	      var parents = commonParents();
-	      if (!parents || parents.length < 2) return;
-	      var index = parents.indexOf(_relatedParent);
+	    return _cache[ent].matches;
+	  };
 
-	      if (index < 0 || index > parents.length - 2) {
-	        _relatedParent = parents[0];
-	      } else {
-	        _relatedParent = parents[index + 1];
-	      }
+	  features.getParents = function (entity, resolver, geometry) {
+	    if (geometry === 'point') return [];
+	    var ent = osmEntity.key(entity);
 
-	      var surface = context.surface();
-	      surface.selectAll('.related').classed('related', false);
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
+	    }
+
+	    if (!_cache[ent].parents) {
+	      var parents = [];
 
-	      if (_relatedParent) {
-	        surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
+	      if (geometry === 'vertex') {
+	        parents = resolver.parentWays(entity);
+	      } else {
+	        // 'line', 'area', 'relation'
+	        parents = resolver.parentRelations(entity);
 	      }
+
+	      _cache[ent].parents = parents;
 	    }
+
+	    return _cache[ent].parents;
 	  };
 
-	  mode.exit = function () {
-	    _newFeature = false;
+	  features.isHiddenPreset = function (preset, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!preset.tags) return false;
+	    var test = preset.setTags({}, geometry);
 
-	    _operations.forEach(function (operation) {
-	      if (operation.behavior) {
-	        context.uninstall(operation.behavior);
+	    for (var key in _rules) {
+	      if (_rules[key].filter(test, geometry)) {
+	        if (_hidden.indexOf(key) !== -1) {
+	          return key;
+	        }
+
+	        return false;
 	      }
-	    });
+	    }
 
-	    _operations = [];
+	    return false;
+	  };
 
-	    _behaviors.forEach(context.uninstall);
+	  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);
+	    });
+	  };
 
-	    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();
+	  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;
 
-	    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'));
+	    for (var i = 0; i < parents.length; i++) {
+	      if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+	        return false;
+	      }
 	    }
-	  };
 
-	  return mode;
-	}
+	    return true;
+	  };
 
-	function uiLasso(context) {
-	  var group, polygon;
-	  lasso.coordinates = [];
+	  features.hasHiddenConnections = function (entity, resolver) {
+	    if (!_hidden.length) return false;
+	    var childNodes, connections;
 
-	  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));
-	  }
+	    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..
 
-	  function draw() {
-	    if (polygon) {
-	      polygon.data([lasso.coordinates]).attr('d', function (d) {
-	        return 'M' + d.join(' L') + ' Z';
-	      });
-	    }
-	  }
 
-	  lasso.extent = function () {
-	    return lasso.coordinates.reduce(function (extent, point) {
-	      return extent.extend(geoExtent(point));
-	    }, geoExtent());
+	    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));
+	    });
 	  };
 
-	  lasso.p = function (_) {
-	    if (!arguments.length) return lasso;
-	    lasso.coordinates.push(_);
-	    draw();
-	    return lasso;
+	  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);
 	  };
 
-	  lasso.close = function () {
-	    if (group) {
-	      group.call(uiToggle(false, function () {
-	        select(this).remove();
-	      }));
-	    }
+	  features.filter = function (d, resolver) {
+	    if (!_hidden.length) return d;
+	    var result = [];
 
-	    context.container().classed('lasso', false);
-	  };
+	    for (var i = 0; i < d.length; i++) {
+	      var entity = d[i];
 
-	  return lasso;
-	}
+	      if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+	        result.push(entity);
+	      }
+	    }
 
-	function behaviorLasso(context) {
-	  // use pointer events on supported platforms; fallback to mouse events
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	    return result;
+	  };
 
-	  var behavior = function behavior(selection) {
-	    var lasso;
+	  features.forceVisible = function (entityIDs) {
+	    if (!arguments.length) return Object.keys(_forceVisible);
+	    _forceVisible = {};
 
-	    function pointerdown(d3_event) {
-	      var button = 0; // left
+	    for (var i = 0; i < entityIDs.length; i++) {
+	      _forceVisible[entityIDs[i]] = true;
+	      var entity = context.hasEntity(entityIDs[i]);
 
-	      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();
+	      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 pointermove() {
-	      if (!lasso) {
-	        lasso = uiLasso(context);
-	        context.surface().call(lasso);
-	      }
+	    return features;
+	  };
 
-	      lasso.p(context.map().mouse());
+	  features.init = function () {
+	    var storage = corePreferences('disabled-features');
+
+	    if (storage) {
+	      var storageDisabled = storage.replace(/;/g, ',').split(',');
+	      storageDisabled.forEach(features.disable);
 	    }
 
-	    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])]];
+	    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
 
-	    function lassoed() {
-	      if (!lasso) return [];
-	      var graph = context.graph();
-	      var limitToNodes;
 
-	      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 [];
-	      }
+	  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 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
+	      var entities = [].concat(types.relation || [], types.way || [], types.node || []);
 
-	      intersects.sort(function (node1, node2) {
-	        var parents1 = graph.parentWays(node1);
-	        var parents2 = graph.parentWays(node2);
+	      for (var i = 0; i < entities.length; i++) {
+	        var geometry = entities[i].geometry(graph);
+	        features.getMatches(entities[i], graph, geometry);
+	      }
+	    });
 
-	        if (parents1.length && parents2.length) {
-	          // both nodes are vertices
-	          var sharedParents = utilArrayIntersection(parents1, parents2);
+	    _deferred.add(handle);
+	  });
+	  return features;
+	}
 
-	          if (sharedParents.length) {
-	            var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+	//
+	// - 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
+	//
 
-	            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
+	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();
 
-	        return node1.loc[0] - node2.loc[0];
-	      });
-	      return intersects.map(function (entity) {
-	        return entity.id;
-	      });
-	    }
+	    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;
 
-	    function pointerup() {
-	      select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
-	      if (!lasso) return;
-	      var ids = lassoed();
-	      lasso.close();
+	        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 (ids.length) {
-	        context.enter(modeSelect(context, ids));
+	        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
 	      }
 	    }
+	  }
 
-	    selection.on(_pointerPrefix + 'down.lasso', pointerdown);
-	  };
-
-	  behavior.off = function (selection) {
-	    selection.on(_pointerPrefix + 'down.lasso', null);
-	  };
-
-	  return behavior;
+	  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;
 
-	function modeBrowse(context) {
-	  var mode = {
-	    button: 'browse',
-	    id: 'browse',
-	    title: _t('modes.browse.title'),
-	    description: _t('modes.browse.description')
-	  };
-	  var sidebar;
+	    if (shouldReverse(entity)) {
+	      coordinates.reverse();
+	    }
 
-	  var _selectBehavior;
+	    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];
 
-	  var _behaviors = [];
+	        if (a) {
+	          var span = geoVecLength(a, b) - offset;
 
-	  mode.selectBehavior = function (val) {
-	    if (!arguments.length) return _selectBehavior;
-	    _selectBehavior = val;
-	    return mode;
-	  };
+	          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
 
-	  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];
-	    }
+	            var coord = [a, p];
 
-	    _behaviors.forEach(context.install); // Get focus on the body.
+	            for (span -= dt; span >= 0; span -= dt) {
+	              p = geoVecAdd(p, [dx, dy]);
+	              coord.push(p);
+	            }
 
+	            coord.push(b); // generate svg paths
 
-	    if (document.activeElement && document.activeElement.blur) {
-	      document.activeElement.blur();
-	    }
+	            var segment = '';
+	            var j;
 
-	    if (sidebar) {
-	      context.ui().sidebar.show(sidebar);
-	    } else {
-	      context.ui().sidebar.select(null);
-	    }
-	  };
+	            for (j = 0; j < coord.length; j++) {
+	              segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	            }
 
-	  mode.exit = function () {
-	    context.ui().sidebar.hover.cancel();
+	            segments.push({
+	              id: entity.id,
+	              index: i++,
+	              d: segment
+	            });
 
-	    _behaviors.forEach(context.uninstall);
+	            if (bothDirections(entity)) {
+	              segment = '';
 
-	    if (sidebar) {
-	      context.ui().sidebar.hide();
-	    }
-	  };
+	              for (j = coord.length - 1; j >= 0; j--) {
+	                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	              }
 
-	  mode.sidebar = function (_) {
-	    if (!arguments.length) return sidebar;
-	    sidebar = _;
-	    return mode;
-	  };
+	              segments.push({
+	                id: entity.id,
+	                index: i++,
+	                d: segment
+	              });
+	            }
+	          }
 
-	  mode.operations = function () {
-	    return [operationPaste(context)];
-	  };
+	          offset = -span;
+	        }
 
-	  return mode;
+	        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));
+	    }
+	  });
 
-	function behaviorAddWay(context) {
-	  var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-	  var draw = behaviorDraw(context);
-
-	  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);
-	    context.map().dblclickZoomEnable(false);
-	    surface.call(draw);
-	  }
-
-	  behavior.off = function (surface) {
-	    surface.call(draw.off);
+	  var svgpath = function svgpath(entity) {
+	    if (entity.id in cache) {
+	      return cache[entity.id];
+	    } else {
+	      return cache[entity.id] = path(entity.asGeoJSON(graph));
+	    }
 	  };
 
-	  behavior.cancel = function () {
-	    window.setTimeout(function () {
-	      context.map().dblclickZoomEnable(true);
-	    }, 1000);
-	    context.enter(modeBrowse(context));
+	  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);
+	    }
 	  };
 
-	  return utilRebind(behavior, dispatch$1, 'on');
+	  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] + ')';
+	  };
 
-	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);
-	    });
-
-	    if (selected.length) {
-	      newParams.id = selected.join(',');
-	    }
-
-	    newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
-	    return Object.assign(oldParams, newParams);
-	  }
+	  svgpoint.geojson = function (d) {
+	    return svgpoint(d.properties.entity);
+	  };
 
-	  function computedHash() {
-	    return '#' + utilQsString(computedHashParameters(), true);
-	  }
+	  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;
 
-	  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 (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();
+	  }
 
-	    if (selected.length) {
-	      var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+	  function getWaySegments() {
+	    var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+	    var features = {
+	      passive: [],
+	      active: []
+	    };
+	    var start = {};
+	    var end = {};
+	    var node, type;
 
-	      if (selected.length > 1) {
-	        contextual = _t('title.labeled_and_more', {
-	          labeled: firstLabel,
-	          count: selected.length - 1
-	        });
-	      } else {
-	        contextual = firstLabel;
+	    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);
+	        }
 	      }
 
-	      titleID = 'context';
+	      start = end;
 	    }
 
-	    if (includeChangeCount) {
-	      changeCount = context.history().difference().summary().length;
+	    return features;
 
-	      if (changeCount > 0) {
-	        titleID = contextual ? 'changes_context' : 'changes';
-	      }
+	    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]
+	        }
+	      });
 	    }
 
-	    if (titleID) {
-	      return _t('title.format.' + titleID, {
-	        changes: changeCount,
-	        base: baseTitle,
-	        context: contextual
+	    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]
+	        }
 	      });
 	    }
-
-	    return baseTitle;
 	  }
+	}
 
-	  function updateTitle(includeChangeCount) {
-	    if (!context.setsDocumentTitle()) return;
-	    var newTitle = computedTitle(includeChangeCount);
+	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', 'construction', 'proposed'];
 
-	    if (document.title !== newTitle) {
-	      document.title = newTitle;
-	    }
-	  }
+	  var _tags = function _tags(entity) {
+	    return entity.tags;
+	  };
 
-	  function updateHashIfNeeded() {
-	    if (context.inIntro()) return;
-	    var latestHash = computedHash();
+	  var tagClasses = function tagClasses(selection) {
+	    selection.each(function tagClassesEach(entity) {
+	      var value = this.className;
 
-	    if (_cachedHash !== latestHash) {
-	      _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
-	      // though unavoidably creating a browser history entry
+	      if (value.baseVal !== undefined) {
+	        value = value.baseVal;
+	      }
 
-	      window.history.replaceState(null, computedTitle(false
-	      /* includeChangeCount */
-	      ), latestHash); // set the title we want displayed for the browser tab/window
+	      var t = _tags(entity);
 
-	      updateTitle(true
-	      /* includeChangeCount */
-	      );
-	    }
-	  }
+	      var computed = tagClasses.getClassesString(t, value);
 
-	  var _throttledUpdate = throttle(updateHashIfNeeded, 500);
+	      if (computed !== value) {
+	        select(this).attr('class', computed);
+	      }
+	    });
+	  };
 
-	  var _throttledUpdateTitle = throttle(function () {
-	    updateTitle(true
-	    /* includeChangeCount */
-	    );
-	  }, 500);
+	  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
 
-	  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);
+	    var overrideGeometry;
 
-	    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 (/\bstroke\b/.test(value)) {
+	      if (!!t.barrier && t.barrier !== 'no') {
+	        overrideGeometry = 'line';
+	      }
+	    } // preserve base classes (nothing with `tag-`)
 
-	      if (q.id && mode) {
-	        var ids = q.id.split(',').filter(function (id) {
-	          return context.hasEntity(id);
-	        });
 
-	        if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
-	          context.enter(modeSelect(context, ids));
-	          return;
-	        }
+	    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 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
+	      primary = k;
 
-	      if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-	        context.enter(modeBrowse(context));
-	        return;
+	      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);
 	      }
-	    }
-	  }
 
-	  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);
+	      break;
+	    }
 
-	    if (window.location.hash) {
-	      var q = utilStringQs(window.location.hash);
+	    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`
 
-	      if (q.id) {
-	        //if (!context.history().hasRestorableChanges()) {
-	        // targeting specific features: download, select, and zoom to them
-	        context.zoomToEntity(q.id.split(',')[0], !q.map); //}
+	          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 (q.walkthrough === 'true') {
-	        behavior.startWalkthrough = true;
-	      }
 
-	      if (q.map) {
-	        behavior.hadHash = true;
-	      }
+	    if (!status) {
+	      for (i = 0; i < statuses.length; i++) {
+	        k = statuses[i];
+	        v = t[k];
+	        if (!v || v === 'no') continue;
 
-	      hashchange();
-	      updateTitle(false);
+	        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;
+	      }
 	    }
-	  }
 
-	  behavior.off = function () {
-	    _throttledUpdate.cancel();
+	    if (status) {
+	      classes.push('tag-status');
+	      classes.push('tag-status-' + status);
+	    } // add any secondary tags
 
-	    _throttledUpdateTitle.cancel();
 
-	    context.map().on('move.behaviorHash', null);
-	    context.on('enter.behaviorHash', null);
-	    select(window).on('hashchange.behaviorHash', null);
-	    window.location.hash = '';
-	  };
+	    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..
 
-	  return behavior;
-	}
 
-	/*
-	    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.
-	 */
+	    if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+	      var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
-	function coreDifference(base, head) {
-	  var _changes = {};
-	  var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
+	      for (k in t) {
+	        v = t[k];
 
-	  var _diff = {};
+	        if (k in osmPavedTags) {
+	          surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
+	        }
 
-	  function checkEntityID(id) {
-	    var h = head.entities[id];
-	    var b = base.entities[id];
-	    if (h === b) return;
-	    if (_changes[id]) return;
+	        if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+	          surface = 'semipaved';
+	        }
+	      }
 
-	    if (!h && b) {
-	      _changes[id] = {
-	        base: b,
-	        head: h
-	      };
-	      _didChange.deletion = true;
-	      return;
-	    }
+	      classes.push('tag-' + surface);
+	    } // If this is a wikidata-tagged item, add a class for that..
 
-	    if (h && !b) {
-	      _changes[id] = {
-	        base: b,
-	        head: h
-	      };
-	      _didChange.addition = true;
-	      return;
+
+	    var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];
+
+	    if (qid) {
+	      classes.push('tag-wikidata');
 	    }
 
-	    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;
-	      }
+	    return classes.join(' ').trim();
+	  };
 
-	      if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-	        _changes[id] = {
-	          base: b,
-	          head: h
-	        };
-	        _didChange.geometry = true;
-	      }
+	  tagClasses.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return tagClasses;
+	  };
 
-	      if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-	        _changes[id] = {
-	          base: b,
-	          head: h
-	        };
-	        _didChange.geometry = true;
-	      }
+	  return tagClasses;
+	}
 
-	      if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-	        _changes[id] = {
-	          base: b,
-	          head: h
-	        };
-	        _didChange.properties = true;
-	      }
-	    }
+	// 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 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]);
-	    }
+	};
+	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;
 	  }
 
-	  load();
+	  for (var tag in patterns) {
+	    var entityValue = tags[tag];
+	    if (!entityValue) continue;
 
-	  _diff.length = function length() {
-	    return Object.keys(_changes).length;
-	  };
+	    if (typeof patterns[tag] === 'string') {
+	      // extra short syntax (just tag) - pattern name
+	      return 'pattern-' + patterns[tag];
+	    } else {
+	      var values = patterns[tag];
 
-	  _diff.changes = function changes() {
-	    return _changes;
-	  };
+	      for (var value in values) {
+	        if (entityValue !== value) continue;
+	        var rules = values[value];
 
-	  _diff.didChange = _didChange; // pass true to include affected relation members
+	        if (typeof rules === 'string') {
+	          // short syntax - pattern name
+	          return 'pattern-' + rules;
+	        } // long syntax - rule array
 
-	  _diff.extantIDs = function extantIDs(includeRelMembers) {
-	    var result = new Set();
-	    Object.keys(_changes).forEach(function (id) {
-	      if (_changes[id].head) {
-	        result.add(id);
-	      }
 
-	      var h = _changes[id].head;
-	      var b = _changes[id].base;
-	      var entity = h || b;
+	        for (var ruleKey in rules) {
+	          var rule = rules[ruleKey];
+	          var pass = true;
 
-	      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);
+	          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;
+	              }
+	            }
 	          }
-	        });
-	      }
-	    });
-	    return Array.from(result);
-	  };
 
-	  _diff.modified = function modified() {
-	    var result = [];
-	    Object.values(_changes).forEach(function (change) {
-	      if (change.base && change.head) {
-	        result.push(change.head);
+	          if (pass) {
+	            return 'pattern-' + rule.pattern;
+	          }
+	        }
 	      }
-	    });
-	    return result;
-	  };
+	    }
+	  }
 
-	  _diff.created = function created() {
-	    var result = [];
-	    Object.values(_changes).forEach(function (change) {
-	      if (!change.base && change.head) {
-	        result.push(change.head);
-	      }
-	    });
-	    return result;
-	  };
+	  return null;
+	}
 
-	  _diff.deleted = function deleted() {
-	    var result = [];
-	    Object.values(_changes).forEach(function (change) {
-	      if (change.base && !change.head) {
-	        result.push(change.base);
-	      }
-	    });
-	    return result;
-	  };
+	function svgAreas(projection, context) {
+	  function getPatternStyle(tags) {
+	    var imageID = svgTagPattern(tags);
 
-	  _diff.summary = function summary() {
-	    var relevant = {};
-	    var keys = Object.keys(_changes);
+	    if (imageID) {
+	      return 'url("#ideditor-' + imageID + '")';
+	    }
 
-	    for (var i = 0; i < keys.length; i++) {
-	      var change = _changes[keys[i]];
+	    return '';
+	  }
 
-	      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);
+	  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
 
-	        if (moved) {
-	          addParents(change.head);
-	        }
+	    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
 
-	        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');
-	      }
-	    }
+	    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
 
-	    return Object.values(relevant);
+	    targets.exit().remove();
 
-	    function addEntity(entity, graph, changeType) {
-	      relevant[entity.id] = {
-	        entity: entity,
-	        graph: graph,
-	        changeType: changeType
-	      };
-	    }
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-	    function addParents(entity) {
-	      var parents = head.parentWays(entity);
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	      for (var j = parents.length - 1; j >= 0; j--) {
-	        var parent = parents[j];
+	      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
 
-	        if (!(parent.id in relevant)) {
-	          addEntity(parent, head, 'modified');
-	        }
-	      }
-	    }
-	  }; // returns complete set of entities that require a redraw
-	  //  (optionally within given `extent`)
 
+	    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
 
-	  _diff.complete = function complete(extent) {
-	    var result = {};
-	    var id, change;
+	    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
 
-	    for (id in _changes) {
-	      change = _changes[id];
-	      var h = change.head;
-	      var b = change.base;
-	      var entity = h || b;
-	      var i;
-	      if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) continue;
-	      result[id] = h;
+	    nopes.exit().remove(); // enter/update
 
-	      if (entity.type === 'way') {
-	        var nh = h ? h.nodes : [];
-	        var nb = b ? b.nodes : [];
-	        var diff;
-	        diff = utilArrayDifference(nh, nb);
+	    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);
+	  }
 
-	        for (i = 0; i < diff.length; i++) {
-	          result[diff[i]] = head.hasEntity(diff[i]);
-	        }
+	  function drawAreas(selection, graph, entities, filter) {
+	    var path = svgPath(projection, graph, true);
+	    var areas = {};
+	    var multipolygon;
+	    var base = context.history().base();
 
-	        diff = utilArrayDifference(nb, nh);
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.geometry(graph) !== 'area') continue;
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-	        for (i = 0; i < diff.length; i++) {
-	          result[diff[i]] = head.hasEntity(diff[i]);
-	        }
+	      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 (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
+	    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..
 
-	          if (extent && !member.intersects(extent, head)) continue; // not visible
+	    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;
 
-	          result[ids[i]] = member;
-	        }
+	    function sortedByArea(entity) {
+	      if (this._parent.__data__ === 'fill') {
+	        return fillpaths[bisect(fillpaths, -entity.area(graph))];
 	      }
-
-	      addParents(head.parentWays(entity), result);
-	      addParents(head.parentRelations(entity), result);
 	    }
 
-	    return result;
+	    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);
 
-	    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);
+	      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..
 
-	  return _diff;
-	}
+	    touchLayer.call(drawTargets, graph, data.stroke, filter);
+	  }
 
-	function coreTree(head) {
-	  // tree for entities
-	  var _rtree = new RBush();
+	  return drawAreas;
+	}
 
-	  var _bboxes = {}; // maintain a separate tree for granular way segments
+	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;
 
-	  var _segmentsRTree = new RBush();
+	  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 _segmentsBBoxes = {};
-	  var _segmentsByWayId = {};
-	  var tree = {};
+	  var seen = [];
+	  return function stringify(node) {
+	    if (node && node.toJSON && typeof node.toJSON === 'function') {
+	      node = node.toJSON();
+	    }
 
-	  function entityBBox(entity) {
-	    var bbox = entity.extent(head).bbox();
-	    bbox.id = entity.id;
-	    _bboxes[entity.id] = bbox;
-	    return bbox;
-	  }
+	    if (node === undefined) return;
+	    if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+	    if (_typeof(node) !== 'object') return JSON.stringify(node);
+	    var i, out;
 
-	  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 (Array.isArray(node)) {
+	      out = '[';
 
-	    if (!extent) return null;
-	    var bbox = extent.bbox();
-	    bbox.segment = segment;
-	    _segmentsBBoxes[segment.id] = bbox;
-	    return bbox;
-	  }
+	      for (i = 0; i < node.length; i++) {
+	        if (i) out += ',';
+	        out += stringify(node[i]) || 'null';
+	      }
 
-	  function removeEntity(entity) {
-	    _rtree.remove(_bboxes[entity.id]);
+	      return out + ']';
+	    }
 
-	    delete _bboxes[entity.id];
+	    if (node === null) return 'null';
 
-	    if (_segmentsByWayId[entity.id]) {
-	      _segmentsByWayId[entity.id].forEach(function (segment) {
-	        _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
+	    if (seen.indexOf(node) !== -1) {
+	      if (cycles) return JSON.stringify('__cycle__');
+	      throw new TypeError('Converting circular structure to JSON');
+	    }
 
-	        delete _segmentsBBoxes[segment.id];
-	      });
+	    var seenIndex = seen.push(node) - 1;
+	    var keys = Object.keys(node).sort(cmp && cmp(node));
+	    out = '';
 
-	      delete _segmentsByWayId[entity.id];
+	    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;
 	    }
-	  }
 
-	  function loadEntities(entities) {
-	    _rtree.load(entities.map(entityBBox));
+	    seen.splice(seenIndex, 1);
+	    return '{' + out + '}';
+	  }(data);
+	};
 
-	    var segments = [];
-	    entities.forEach(function (entity) {
-	      if (entity.segments) {
-	        var entitySegments = entity.segments(head); // cache these to make them easy to remove later
+	var $$1 = _export;
+	var $entries = objectToArray.entries;
 
-	        _segmentsByWayId[entity.id] = entitySegments;
-	        segments = segments.concat(entitySegments);
-	      }
-	    });
-	    if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+	// `Object.entries` method
+	// https://tc39.es/ecma262/#sec-object.entries
+	$$1({ target: 'Object', stat: true }, {
+	  entries: function entries(O) {
+	    return $entries(O);
 	  }
+	});
 
-	  function updateParents(entity, insertions, memo) {
-	    head.parentWays(entity).forEach(function (way) {
-	      if (_bboxes[way.id]) {
-	        removeEntity(way);
-	        insertions[way.id] = way;
-	      }
+	var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+	    _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
 
-	      updateParents(way, insertions, memo);
-	    });
-	    head.parentRelations(entity).forEach(function (relation) {
-	      if (memo[entity.id]) return;
-	      memo[entity.id] = true;
+	// cast array x into numbers
+	// get the content of a text node, if any
+	function nodeVal(x) {
+	  if (x && x.normalize) {
+	    x.normalize();
+	  }
 
-	      if (_bboxes[relation.id]) {
-	        removeEntity(relation);
-	        insertions[relation.id] = relation;
-	      }
+	  return x && x.textContent || "";
+	} // one Y child of X, if any, otherwise null
 
-	      updateParents(relation, insertions, memo);
-	    });
-	  }
 
-	  tree.rebase = function (entities, force) {
-	    var insertions = {};
+	function get1(x, y) {
+	  var n = x.getElementsByTagName(y);
+	  return n.length ? n[0] : null;
+	}
 
-	    for (var i = 0; i < entities.length; i++) {
-	      var entity = entities[i];
-	      if (!entity.visible) continue;
+	function getLineStyle(extensions) {
+	  var style = {};
 
-	      if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-	        if (!force) {
-	          continue;
-	        } else if (_bboxes[entity.id]) {
-	          removeEntity(entity);
-	        }
-	      }
+	  if (extensions) {
+	    var lineStyle = get1(extensions, "line");
 
-	      insertions[entity.id] = entity;
-	      updateParents(entity, insertions, {});
+	    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;
 	    }
+	  }
 
-	    loadEntities(Object.values(insertions));
-	    return tree;
-	  };
+	  return style;
+	} // get the contents of multiple text nodes, if present
 
-	  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 = {};
 
-	    if (changed.deletion) {
-	      diff.deleted().forEach(function (entity) {
-	        removeEntity(entity);
-	      });
-	    }
+	function getMulti(x, ys) {
+	  var o = {};
+	  var n;
+	  var k;
 
-	    if (changed.geometry) {
-	      diff.modified().forEach(function (entity) {
-	        removeEntity(entity);
-	        insertions[entity.id] = entity;
-	        updateParents(entity, insertions, {});
-	      });
-	    }
+	  for (k = 0; k < ys.length; k++) {
+	    n = get1(x, ys[k]);
+	    if (n) o[ys[k]] = nodeVal(n);
+	  }
 
-	    if (changed.addition) {
-	      diff.created().forEach(function (entity) {
-	        insertions[entity.id] = entity;
-	      });
-	    }
+	  return o;
+	}
 
-	    loadEntities(Object.values(insertions));
-	  } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
+	function getProperties$1(node) {
+	  var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)
+
+	  var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");
 
+	  for (var i = 0; i < extensions.length; i++) {
+	    var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
 
-	  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`
+	    if (extension.parentNode.parentNode === node) {
+	      prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
+	    }
+	  }
 
+	  var links = node.getElementsByTagName("link");
+	  if (links.length) prop.links = [];
 
-	  tree.waySegments = function (extent, graph) {
-	    updateToGraph(graph);
-	    return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
-	      return bbox.segment;
-	    });
-	  };
+	  for (var _i = 0; _i < links.length; _i++) {
+	    prop.links.push(Object.assign({
+	      href: links[_i].getAttribute("href")
+	    }, getMulti(links[_i], ["text", "type"])));
+	  }
 
-	  return tree;
+	  return prop;
 	}
 
-	function uiModal(selection, blocking) {
-	  var _this = this;
-
-	  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);
+	function coordPair$1(x) {
+	  var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+	  var ele = get1(x, "ele"); // handle namespaced attribute in browser
 
-	  shaded.close = function () {
-	    shaded.transition().duration(200).style('opacity', 0).remove();
-	    modal.transition().duration(200).style('top', '0px');
-	    select(document).call(keybinding.unbind);
-	  };
+	  var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+	  var time = get1(x, "time");
+	  var e;
 
-	  var modal = shaded.append('div').attr('class', 'modal fillL');
-	  modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
+	  if (ele) {
+	    e = parseFloat(nodeVal(ele));
 
-	  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);
+	    if (!isNaN(e)) {
+	      ll.push(e);
+	    }
 	  }
 
-	  modal.append('div').attr('class', 'content');
-	  modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
+	  var result = {
+	    coordinates: ll,
+	    time: time ? nodeVal(time) : null,
+	    extendedValues: []
+	  };
 
-	  if (animate) {
-	    shaded.transition().style('opacity', 1);
-	  } else {
-	    shaded.style('opacity', 1);
+	  if (heart) {
+	    result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
 	  }
 
-	  return shaded;
+	  var extensions = get1(x, "extensions");
 
-	  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 (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)));
 
-	    if (node) {
-	      node.focus();
-	    } else {
-	      select(this).node().blur();
+	      if (!isNaN(v)) {
+	        result.extendedValues.push([name, v]);
+	      }
 	    }
 	  }
 
-	  function moveFocusToLast() {
-	    var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
+	  return result;
+	}
 
-	    if (nodes.length) {
-	      nodes[nodes.length - 1].focus();
-	    } else {
-	      select(this).node().blur();
+	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
 	    }
-	  }
+	  };
 	}
 
-	function uiLoading(context) {
-	  var _modalSelection = select(null);
+	function getPoints$1(node, pointname) {
+	  var pts = node.getElementsByTagName(pointname);
+	  if (pts.length < 2) return; // Invalid line in GeoJSON
 
-	  var _message = '';
-	  var _blocking = false;
+	  var line = [];
+	  var times = [];
+	  var extendedValues = {};
 
-	  var loading = function loading(selection) {
-	    _modalSelection = uiModal(selection, _blocking);
+	  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);
 
-	    var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
+	    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];
 
-	    loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
-	    loadertext.append('h3').html(_message);
+	      var plural = name === "heart" ? name : name + "s";
 
-	    _modalSelection.select('button.close').attr('class', 'hide');
+	      if (!extendedValues[plural]) {
+	        extendedValues[plural] = Array(pts.length).fill(null);
+	      }
 
-	    return loading;
-	  };
+	      extendedValues[plural][i] = val;
+	    }
+	  }
 
-	  loading.message = function (val) {
-	    if (!arguments.length) return _message;
-	    _message = val;
-	    return loading;
+	  return {
+	    line: line,
+	    times: times,
+	    extendedValues: extendedValues
 	  };
+	}
 
-	  loading.blocking = function (val) {
-	    if (!arguments.length) return _blocking;
-	    _blocking = val;
-	    return loading;
-	  };
+	function getTrack(node) {
+	  var segments = node.getElementsByTagName("trkseg");
+	  var track = [];
+	  var times = [];
+	  var extractedLines = [];
 
-	  loading.close = function () {
-	    _modalSelection.remove();
-	  };
+	  for (var i = 0; i < segments.length; i++) {
+	    var line = getPoints$1(segments[i], "trkpt");
 
-	  loading.isShown = function () {
-	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	    if (line) {
+	      extractedLines.push(line);
+	      if (line.times && line.times.length) times.push(line.times);
+	    }
+	  }
+
+	  if (extractedLines.length === 0) return;
+	  var multi = extractedLines.length > 1;
+	  var properties = Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+	    _gpxType: "trk"
+	  }, times.length ? {
+	    coordinateProperties: {
+	      times: multi ? times : times[0]
+	    }
+	  } : {});
+
+	  for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+	    var _line = extractedLines[_i3];
+	    track.push(_line.line);
+
+	    for (var _i4 = 0, _Object$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];
+
+	      var props = properties;
+
+	      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]
+	    }
 	  };
+	}
 
-	  return loading;
+	function getPoint(node) {
+	  return {
+	    type: "Feature",
+	    properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+	    geometry: {
+	      type: "Point",
+	      coordinates: coordPair$1(node).coordinates
+	    }
+	  };
 	}
 
-	function coreHistory(context) {
-	  var dispatch$1 = dispatch('reset', 'change', 'merge', 'restore', 'undone', 'redone');
+	function gpxGen(doc) {
+	  var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;
 
-	  var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
+	  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;
 
+	        case 4:
+	          if (!(i < tracks.length)) {
+	            _context.next = 12;
+	            break;
+	          }
 
-	  var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
+	          feature = getTrack(tracks[i]);
 
-	  var duration = 150;
-	  var _imageryUsed = [];
-	  var _photoOverlaysUsed = [];
-	  var _checkpoints = {};
+	          if (!feature) {
+	            _context.next = 9;
+	            break;
+	          }
 
-	  var _pausedGraph;
+	          _context.next = 9;
+	          return feature;
 
-	  var _stack;
+	        case 9:
+	          i++;
+	          _context.next = 4;
+	          break;
 
-	  var _index;
+	        case 12:
+	          _i5 = 0;
 
-	  var _tree; // internal _act, accepts list of actions and eased time
+	        case 13:
+	          if (!(_i5 < routes.length)) {
+	            _context.next = 21;
+	            break;
+	          }
 
+	          _feature = getRoute(routes[_i5]);
 
-	  function _act(actions, t) {
-	    actions = Array.prototype.slice.call(actions);
-	    var annotation;
+	          if (!_feature) {
+	            _context.next = 18;
+	            break;
+	          }
 
-	    if (typeof actions[actions.length - 1] !== 'function') {
-	      annotation = actions.pop();
-	    }
+	          _context.next = 18;
+	          return _feature;
 
-	    var graph = _stack[_index].graph;
+	        case 18:
+	          _i5++;
+	          _context.next = 13;
+	          break;
 
-	    for (var i = 0; i < actions.length; i++) {
-	      graph = actions[i](graph, t);
-	    }
+	        case 21:
+	          _i6 = 0;
 
-	    return {
-	      graph: graph,
-	      annotation: annotation,
-	      imageryUsed: _imageryUsed,
-	      photoOverlaysUsed: _photoOverlaysUsed,
-	      transform: context.projection.transform(),
-	      selectedIDs: context.selectedIDs()
-	    };
-	  } // internal _perform with eased time
+	        case 22:
+	          if (!(_i6 < waypoints.length)) {
+	            _context.next = 28;
+	            break;
+	          }
 
+	          _context.next = 25;
+	          return getPoint(waypoints[_i6]);
 
-	  function _perform(args, t) {
-	    var previous = _stack[_index].graph;
-	    _stack = _stack.slice(0, _index + 1);
+	        case 25:
+	          _i6++;
+	          _context.next = 22;
+	          break;
 
-	    var actionResult = _act(args, t);
+	        case 28:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked);
+	}
 
-	    _stack.push(actionResult);
+	function gpx(doc) {
+	  return {
+	    type: "FeatureCollection",
+	    features: Array.from(gpxGen(doc))
+	  };
+	}
 
-	    _index++;
-	    return change(previous);
-	  } // internal _replace with eased time
+	var removeSpace = /\s*/g;
+	var trimSpace = /^\s*|\s*$/g;
+	var splitSpace = /\s+/; // generate a short, numeric hash of a string
 
+	function okhash(x) {
+	  if (!x || !x.length) return 0;
+	  var h = 0;
 
-	  function _replace(args, t) {
-	    var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
+	  for (var i = 0; i < x.length; i++) {
+	    h = (h << 5) - h + x.charCodeAt(i) | 0;
+	  }
 
-	    var actionResult = _act(args, t);
+	  return h;
+	} // get one coordinate from a coordinate array, if any
 
-	    _stack[_index] = actionResult;
-	    return change(previous);
-	  } // internal _overwrite with eased time
 
+	function coord1(v) {
+	  return v.replace(removeSpace, "").split(",").map(parseFloat);
+	} // get all coordinates from a coordinate array as [[],[]]
 
-	  function _overwrite(args, t) {
-	    var previous = _stack[_index].graph;
 
-	    if (_index > 0) {
-	      _index--;
+	function coord(v) {
+	  return v.replace(trimSpace, "").split(splitSpace).map(coord1);
+	}
 
-	      _stack.pop();
-	    }
+	function xml2str(node) {
+	  if (node.xml !== undefined) return node.xml;
 
-	    _stack = _stack.slice(0, _index + 1);
+	  if (node.tagName) {
+	    var output = node.tagName;
 
-	    var actionResult = _act(args, t);
+	    for (var i = 0; i < node.attributes.length; i++) {
+	      output += node.attributes[i].name + node.attributes[i].value;
+	    }
 
-	    _stack.push(actionResult);
+	    for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+	      output += xml2str(node.childNodes[_i9]);
+	    }
 
-	    _index++;
-	    return change(previous);
-	  } // determine difference and dispatch a change event
+	    return output;
+	  }
 
+	  if (node.nodeName === "#text") {
+	    return (node.nodeValue || node.value || "").trim();
+	  }
 
-	  function change(previous) {
-	    var difference = coreDifference(previous, history.graph());
+	  if (node.nodeName === "#cdata-section") {
+	    return node.nodeValue;
+	  }
 
-	    if (!_pausedGraph) {
-	      dispatch$1.call('change', this, difference);
-	    }
+	  return "";
+	}
 
-	    return difference;
-	  } // iD uses namespaced keys so multiple installations do not conflict
+	var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];
 
+	function kmlColor(properties, elem, prefix) {
+	  var v = nodeVal(get1(elem, "color")) || "";
+	  var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";
 
-	  function getKey(n) {
-	    return 'iD_' + window.location.origin + '_' + n;
+	  if (v.substr(0, 1) === "#") {
+	    v = v.substr(1);
 	  }
 
-	  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;
-	      });
+	  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);
+	  }
+	}
 
-	      _stack[0].graph.rebase(entities, stack, false);
+	function numericProperty(properties, elem, source, target) {
+	  var val = parseFloat(nodeVal(get1(elem, source)));
+	  if (!isNaN(val)) properties[target] = val;
+	}
 
-	      _tree.rebase(entities, false);
+	function gxCoords(root) {
+	  var elems = root.getElementsByTagName("coord");
+	  var coords = [];
+	  var times = [];
+	  if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");
 
-	      dispatch$1.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];
+	  for (var i = 0; i < elems.length; i++) {
+	    coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
+	  }
 
-	      if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
-	        transitionable = !!action0.transitionable;
-	      }
+	  var timeElems = root.getElementsByTagName("when");
 
-	      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;
+	  for (var j = 0; j < timeElems.length; j++) {
+	    times.push(nodeVal(timeElems[j]));
+	  }
 
-	      if (isNaN(+n) || +n < 0) {
-	        n = 1;
-	      }
+	  return {
+	    coords: coords,
+	    times: times
+	  };
+	}
 
-	      while (n-- > 0 && _index > 0) {
-	        _index--;
+	function getGeometry(root) {
+	  var geomNode;
+	  var geomNodes;
+	  var i;
+	  var j;
+	  var k;
+	  var geoms = [];
+	  var coordTimes = [];
 
-	        _stack.pop();
-	      }
+	  if (get1(root, "MultiGeometry")) {
+	    return getGeometry(get1(root, "MultiGeometry"));
+	  }
 
-	      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;
+	  if (get1(root, "MultiTrack")) {
+	    return getGeometry(get1(root, "MultiTrack"));
+	  }
 
-	      while (_index > 0) {
-	        _index--;
-	        if (_stack[_index].annotation) break;
-	      }
+	  if (get1(root, "gx:MultiTrack")) {
+	    return getGeometry(get1(root, "gx:MultiTrack"));
+	  }
 
-	      dispatch$1.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;
+	  for (i = 0; i < geotypes.length; i++) {
+	    geomNodes = root.getElementsByTagName(geotypes[i]);
 
-	      while (tryIndex < _stack.length - 1) {
-	        tryIndex++;
+	    if (geomNodes) {
+	      for (j = 0; j < geomNodes.length; j++) {
+	        geomNode = geomNodes[j];
 
-	        if (_stack[tryIndex].annotation) {
-	          _index = tryIndex;
-	          dispatch$1.call('redone', this, _stack[_index], previousStack);
-	          break;
+	        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 = [];
+
+	          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 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;
+	  return {
+	    geoms: geoms,
+	    coordTimes: coordTimes
+	  };
+	}
 
-	      while (i >= 0) {
-	        if (_stack[i].annotation) return _stack[i].annotation;
-	        i--;
-	      }
-	    },
-	    redoAnnotation: function redoAnnotation() {
-	      var i = _index + 1;
+	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;
 
-	      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 (styleUrl) {
+	    if (styleUrl[0] !== "#") {
+	      styleUrl = "#" + styleUrl;
+	    }
 
-	      if (action) {
-	        head = action(head);
-	      }
+	    properties.styleUrl = styleUrl;
 
-	      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();
+	    if (styleIndex[styleUrl]) {
+	      properties.styleHash = styleIndex[styleUrl];
+	    }
 
-	        _stack.slice(1, _index + 1).forEach(function (state) {
-	          state.imageryUsed.forEach(function (source) {
-	            if (source !== 'Custom') {
-	              s.add(source);
-	            }
-	          });
-	        });
+	    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
 
-	        return Array.from(s);
-	      }
-	    },
-	    photoOverlaysUsed: function photoOverlaysUsed(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);
-	            });
-	          }
-	        });
+	    var style = styleByHash[properties.styleHash];
 
-	        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 = {};
-	      }
+	    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");
+	    }
+	  }
 
-	      dispatch$1.call('reset');
-	      dispatch$1.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..
+	  if (description) properties.description = description;
 
-	      Object.values(graph.base().entities).forEach(function (entity) {
-	        var copy = copyIntroEntity(entity);
-	        baseEntities[copy.id] = copy;
-	      }); // replace base entities with head entities..
+	  if (timeSpan) {
+	    var begin = nodeVal(get1(timeSpan, "begin"));
+	    var end = nodeVal(get1(timeSpan, "end"));
+	    properties.timespan = {
+	      begin: begin,
+	      end: end
+	    };
+	  }
 
-	      Object.keys(graph.entities).forEach(function (id) {
-	        var entity = graph.entities[id];
+	  if (timeStamp) {
+	    properties.timestamp = nodeVal(get1(timeStamp, "when"));
+	  }
 
-	        if (entity) {
-	          var copy = copyIntroEntity(entity);
-	          baseEntities[copy.id] = copy;
-	        } else {
-	          delete baseEntities[id];
-	        }
-	      }); // swap temporary for permanent ids..
+	  if (iconStyle) {
+	    kmlColor(properties, iconStyle, "icon");
+	    numericProperty(properties, iconStyle, "scale", "icon-scale");
+	    numericProperty(properties, iconStyle, "heading", "icon-heading");
+	    var hotspot = get1(iconStyle, "hotSpot");
 
-	      Object.values(baseEntities).forEach(function (entity) {
-	        if (Array.isArray(entity.nodes)) {
-	          entity.nodes = entity.nodes.map(function (node) {
-	            return permIDs[node] || node;
-	          });
-	        }
+	    if (hotspot) {
+	      var left = parseFloat(hotspot.getAttribute("x"));
+	      var top = parseFloat(hotspot.getAttribute("y"));
+	      if (!isNaN(left) && !isNaN(top)) properties["icon-offset"] = [left, top];
+	    }
 
-	        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
-	      });
+	    var icon = get1(iconStyle, "Icon");
 
-	      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`
+	    if (icon) {
+	      var href = nodeVal(get1(icon, "href"));
+	      if (href) properties.icon = href;
+	    }
+	  }
 
-	        if (copy.tags && !Object.keys(copy.tags)) {
-	          delete copy.tags;
-	        }
+	  if (labelStyle) {
+	    kmlColor(properties, labelStyle, "label");
+	    numericProperty(properties, labelStyle, "scale", "label-scale");
+	  }
 
-	        if (Array.isArray(copy.loc)) {
-	          copy.loc[0] = +copy.loc[0].toFixed(6);
-	          copy.loc[1] = +copy.loc[1].toFixed(6);
-	        }
+	  if (lineStyle) {
+	    kmlColor(properties, lineStyle, "stroke");
+	    numericProperty(properties, lineStyle, "width", "stroke-width");
+	  }
 
-	        var match = source.id.match(/([nrw])-\d*/); // temporary id
+	  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 (match !== null) {
-	          var nrw = match[1];
-	          var permID;
+	  if (extendedData) {
+	    var datas = extendedData.getElementsByTagName("Data"),
+	        simpleDatas = extendedData.getElementsByTagName("SimpleData");
 
-	          do {
-	            permID = nrw + ++nextID[nrw];
-	          } while (baseEntities.hasOwnProperty(permID));
+	    for (i = 0; i < datas.length; i++) {
+	      properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
+	    }
 
-	          copy.id = permIDs[source.id] = permID;
-	        }
+	    for (i = 0; i < simpleDatas.length; i++) {
+	      properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
+	    }
+	  }
 
-	        return copy;
-	      }
+	  if (visibility) {
+	    properties.visibility = nodeVal(visibility);
+	  }
+
+	  if (geomsAndTimes.coordTimes.length) {
+	    properties.coordinateProperties = {
+	      times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
+	    };
+	  }
+
+	  var feature = {
+	    type: "Feature",
+	    geometry: geomsAndTimes.geoms.length === 0 ? null : geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
+	      type: "GeometryCollection",
+	      geometries: geomsAndTimes.geoms
 	    },
-	    toJSON: function toJSON() {
-	      if (!this.hasChanges()) return;
-	      var allEntities = {};
-	      var baseEntities = {};
-	      var base = _stack[0];
+	    properties: properties
+	  };
+	  if (root.getAttribute("id")) feature.id = root.getAttribute("id");
+	  return feature;
+	}
 
-	      var s = _stack.map(function (i) {
-	        var modified = [];
-	        var deleted = [];
-	        Object.keys(i.graph.entities).forEach(function (id) {
-	          var entity = i.graph.entities[id];
+	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
+
+	          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");
+
+	          for (k = 0; k < styles.length; k++) {
+	            hash = okhash(xml2str(styles[k])).toString(16);
+	            styleIndex["#" + styles[k].getAttribute("id")] = hash;
+	            styleByHash[hash] = styles[k];
+	          }
 
-	          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.
+	          for (l = 0; l < styleMaps.length; l++) {
+	            styleIndex["#" + styleMaps[l].getAttribute("id")] = okhash(xml2str(styleMaps[l])).toString(16);
+	            pairs = styleMaps[l].getElementsByTagName("Pair");
+	            pairsMap = {};
 
+	            for (m = 0; m < pairs.length; m++) {
+	              pairsMap[nodeVal(get1(pairs[m], "key"))] = nodeVal(get1(pairs[m], "styleUrl"));
+	            }
 
-	          if (id in base.graph.entities) {
-	            baseEntities[id] = base.graph.entities[id];
+	            styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
 	          }
 
-	          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
+	          j = 0;
 
+	        case 9:
+	          if (!(j < placemarks.length)) {
+	            _context3.next = 17;
+	            break;
+	          }
 
-	          var baseParents = base.graph._parentWays[id];
+	          feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
 
-	          if (baseParents) {
-	            baseParents.forEach(function (parentID) {
-	              if (parentID in base.graph.entities) {
-	                baseEntities[parentID] = base.graph.entities[parentID];
-	              }
-	            });
+	          if (!feature) {
+	            _context3.next = 14;
+	            break;
 	          }
-	        });
-	        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 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;
+	          _context3.next = 14;
+	          return feature;
 
-	      if (h.version === 2 || h.version === 3) {
-	        var allEntities = {};
-	        h.entities.forEach(function (entity) {
-	          allEntities[osmEntity.key(entity)] = osmEntity(entity);
-	        });
+	        case 14:
+	          j++;
+	          _context3.next = 9;
+	          break;
 
-	        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);
-	          });
+	        case 17:
+	        case "end":
+	          return _context3.stop();
+	      }
+	    }
+	  }, _marked3);
+	}
 
-	          var stack = _stack.map(function (state) {
-	            return state.graph;
-	          });
+	function kml(doc) {
+	  return {
+	    type: "FeatureCollection",
+	    features: Array.from(kmlGen(doc))
+	  };
+	}
 
-	          _stack[0].graph.rebase(baseEntities, stack, true);
+	var _initialized = false;
+	var _enabled = false;
 
-	          _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
+	var _geojson;
 
+	function svgData(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	          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);
-	            });
+	  var _showLabels = true;
+	  var detected = utilDetect();
+	  var layer = select(null);
 
-	            if (missing.length && osm) {
-	              loadComplete = false;
-	              context.map().redrawEnable(false);
-	              var loading = uiLoading(context).blocking(true);
-	              context.container().call(loading);
+	  var _vtService;
 
-	              var childNodesLoaded = function childNodesLoaded(err, result) {
-	                if (!err) {
-	                  var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-	                  var visibles = visibleGroups["true"] || []; // alive nodes
+	  var _fileList;
 
-	                  var invisibles = visibleGroups["false"] || []; // deleted nodes
+	  var _template;
 
-	                  if (visibles.length) {
-	                    var visibleIDs = visibles.map(function (entity) {
-	                      return entity.id;
-	                    });
+	  var _src;
 
-	                    var stack = _stack.map(function (state) {
-	                      return state.graph;
-	                    });
+	  function init() {
+	    if (_initialized) return; // run once
 
-	                    missing = utilArrayDifference(missing, visibleIDs);
+	    _geojson = {};
+	    _enabled = true;
 
-	                    _stack[0].graph.rebase(visibles, stack, true);
+	    function over(d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      d3_event.dataTransfer.dropEffect = 'copy';
+	    }
 
-	                    _tree.rebase(visibles, true);
-	                  } // fetch older versions of nodes that were deleted..
+	    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;
 
-	                  invisibles.forEach(function (entity) {
-	                    osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-	                  });
-	                }
+	      _vtService.event.on('loadedData', throttledRedraw);
+	    } else if (!services.vectorTile && _vtService) {
+	      _vtService = null;
+	    }
 
-	                if (err || !missing.length) {
-	                  loading.close();
-	                  context.map().redrawEnable(true);
-	                  dispatch$1.call('change');
-	                  dispatch$1.call('restore', this);
-	                }
-	              };
+	    return _vtService;
+	  }
 
-	              osm.loadMultiple(missing, childNodesLoaded);
-	            }
-	          }
-	        }
+	  function showLayer() {
+	    layerOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        _stack = h.stack.map(function (d) {
-	          var entities = {},
-	              entity;
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+	  }
 
-	          if (d.modified) {
-	            d.modified.forEach(function (key) {
-	              entity = allEntities[key];
-	              entities[entity.id] = entity;
-	            });
-	          }
+	  function layerOn() {
+	    layer.style('display', 'block');
+	  }
 
-	          if (d.deleted) {
-	            d.deleted.forEach(function (id) {
-	              entities[id] = undefined;
-	            });
-	          }
+	  function layerOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  } // ensure that all geojson features in a collection have IDs
 
-	          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 = {};
 
-	          for (var i in d.entities) {
-	            var entity = d.entities[i];
-	            entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-	          }
+	  function ensureIDs(gj) {
+	    if (!gj) return null;
 
-	          d.graph = coreGraph(_stack[0].graph).load(entities);
-	          return d;
-	        });
+	    if (gj.type === 'FeatureCollection') {
+	      for (var i = 0; i < gj.features.length; i++) {
+	        ensureFeatureID(gj.features[i]);
 	      }
+	    } else {
+	      ensureFeatureID(gj);
+	    }
 
-	      var transform = _stack[_index].transform;
+	    return gj;
+	  } // ensure that each single Feature object has a unique ID
 
-	      if (transform) {
-	        context.map().transformEase(transform, 0); // 0 = immediate, no easing
-	      }
 
-	      if (loadComplete) {
-	        dispatch$1.call('change');
-	        dispatch$1.call('restore', this);
-	      }
+	  function ensureFeatureID(feature) {
+	    if (!feature) return;
+	    feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+	    return feature;
+	  } // Prefer an array of Features instead of a FeatureCollection
 
-	      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) {
-	        corePreferences(getKey('saved_history'), history.toJSON() || null);
-	      }
 
-	      return history;
-	    },
-	    // delete the history version saved in localStorage
-	    clearSaved: function clearSaved() {
-	      context.debouncedSave.cancel();
+	  function getFeatures(gj) {
+	    if (!gj) return [];
 
-	      if (_lock.locked()) {
-	        _hasUnresolvedRestorableChanges = false;
-	        corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
+	    if (gj.type === 'FeatureCollection') {
+	      return gj.features;
+	    } else {
+	      return [gj];
+	    }
+	  }
 
-	        corePreferences('comment', null);
-	        corePreferences('hashtags', null);
-	        corePreferences('source', null);
-	      }
+	  function featureKey(d) {
+	    return d.__featurehash__;
+	  }
 
-	      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$1, 'on');
-	}
+	  function isPolygon(d) {
+	    return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	  }
 
-	/**
-	 * Look for roads that can be connected to other roads with a short extension
-	 */
+	  function clipPathID(d) {
+	    return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	  }
 
-	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 featureClasses(d) {
+	    return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+	  }
 
-	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
+	  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 SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
+	    var geoData, polygonData;
 
-	  function isHighway(entity) {
-	    return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
-	  }
+	    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);
+	    }
 
-	  function isTaggedAsNotContinuing(node) {
-	    return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+	    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];
+	      });
+	    }
 	  }
 
-	  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]);
+	  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];
+	  }
 
-	          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;
+	  function xmlToDom(textdata) {
+	    return new DOMParser().parseFromString(textdata, 'text/xml');
+	  }
 
-	    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 stringifyGeojsonProperties(feature) {
+	    var properties = feature.properties;
 
-	          var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
-	              endNodeId = _this$issue$entityIds[1],
-	              crossWayId = _this$issue$entityIds[2];
+	    for (var key in properties) {
+	      var property = properties[key];
 
-	          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 (typeof property === 'number' || typeof property === 'boolean' || Array.isArray(property)) {
+	        properties[key] = property.toString();
+	      } else if (property === null) {
+	        properties[key] = 'null';
+	      } else if (_typeof(property) === 'object') {
+	        properties[key] = JSON.stringify(property);
+	      }
+	    }
+	  }
 
-	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
+	  drawData.setFile = function (extension, data) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    var gj;
 
-	          if (nearEndNodes.length > 0) {
-	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
+	    switch (extension) {
+	      case '.gpx':
+	        gj = gpx(xmlToDom(data));
+	        break;
 
-	            if (collinear) {
-	              context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
-	              return;
-	            }
-	          }
+	      case '.kml':
+	        gj = kml(xmlToDom(data));
+	        break;
 
-	          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
+	      case '.geojson':
+	      case '.json':
+	        gj = JSON.parse(data);
 
-	          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);
-	          }
+	        if (gj.type === 'FeatureCollection') {
+	          gj.features.forEach(stringifyGeojsonProperties);
+	        } else if (gj.type === 'Feature') {
+	          stringifyGeojsonProperties(gj);
 	        }
-	      })];
-	      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.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'));
-	          }
-	        }));
-	      }
 
-	      return fixes;
+	        break;
 	    }
 
-	    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'));
+	    gj = gj || {};
+
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = extension + ' data file';
+	      this.fitZoom();
 	    }
 
-	    function isExtendableCandidate(node, way) {
-	      // can not accurately test vertices on tiles not downloaded from osm - #5938
-	      var osm = services.osm;
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	      if (osm && !osm.isDataLoaded(node.loc)) {
-	        return false;
-	      }
+	  drawData.showLabels = function (val) {
+	    if (!arguments.length) return _showLabels;
+	    _showLabels = val;
+	    return this;
+	  };
 
-	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-	        return false;
-	      }
+	  drawData.enabled = function (val) {
+	    if (!arguments.length) return _enabled;
+	    _enabled = val;
 
-	      var occurrences = 0;
+	    if (_enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	      for (var index in way.nodes) {
-	        if (way.nodes[index] === node.id) {
-	          occurrences += 1;
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	          if (occurrences > 1) {
-	            return false;
-	          }
-	        }
-	      }
+	  drawData.hasData = function () {
+	    var gj = _geojson || {};
+	    return !!(_template || Object.keys(gj).length);
+	  };
 
-	      return true;
-	    }
+	  drawData.template = function (val, src) {
+	    if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-	    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
+	    var osm = context.connection();
 
-	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
+	    if (osm) {
+	      var blocklists = osm.imageryBlocklists();
+	      var fail = false;
+	      var tested = 0;
+	      var regex;
 
-	        if (geoHasSelfIntersections(testNodes, nodeID)) return;
-	        results.push(connectionInfo);
-	      });
-	      return results;
-	    }
+	      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.
 
-	    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 (!tested) {
+	        regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	        fail = regex.test(val);
+	      }
 	    }
 
-	    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
+	    _template = val;
+	    _fileList = null;
+	    _geojson = null; // strip off the querystring/hash from the template,
+	    // it often includes the access token
 
-	      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);
+	    _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        if (diff < minAngle) {
-	          joinTo = endNode;
-	          minAngle = diff;
-	        }
-	      });
-	      /* Threshold set by considering right angle triangle
-	      based on node joining threshold and extension distance */
+	  drawData.geojson = function (gj, src) {
+	    if (!arguments.length) return _geojson;
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    gj = gj || {};
 
-	      if (minAngle <= SIG_ANGLE_TH) return joinTo;
-	      return null;
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = src || 'unknown.geojson';
 	    }
 
-	    function hasTag(tags, key) {
-	      return tags[key] !== undefined && tags[key] !== 'no';
-	    }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    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
+	  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();
 
-	      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
+	    reader.onload = function () {
+	      return function (e) {
+	        drawData.setFile(extension, e.target.result);
+	      };
+	    }();
 
-	      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;
+	    reader.readAsText(f);
+	    return this;
+	  };
+
+	  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 */
+	      });
+	    } else {
+	      drawData.template(url);
 	    }
 
-	    function canConnectByExtend(way, endNodeIdx) {
-	      var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
+	    return this;
+	  };
 
-	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
+	  drawData.getSrc = function () {
+	    return _src || '';
+	  };
 
-	      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
+	  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 */
 
-	      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
+	      switch (geom.type) {
+	        case 'Point':
+	          c = [c];
 
-	      var segmentInfos = tree.waySegments(queryExtent, graph);
+	        case 'MultiPoint':
+	        case 'LineString':
+	          break;
 
-	      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]);
+	        case 'MultiPolygon':
+	          c = utilArrayFlatten(c);
 
-	        if (crossLoc) {
-	          return {
-	            mid: midNode,
-	            node: tipNode,
-	            wid: way2.id,
-	            edge: [nA.id, nB.id],
-	            cross_loc: crossLoc
-	          };
-	        }
+	        case 'Polygon':
+	        case 'MultiLineString':
+	          c = utilArrayFlatten(c);
+	          break;
 	      }
+	      /* eslint-enable no-fallthrough */
 
-	      return null;
+
+	      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;
 	  };
 
-	  validation.type = type;
-	  return validation;
+	  init();
+	  return drawData;
 	}
 
-	function validationCloseNodes(context) {
-	  var type = 'close_nodes';
-	  var pointThresholdMeters = 0.2;
+	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 = [];
 
-	  var validation = function validation(entity, graph) {
-	    if (entity.type === 'node') {
-	      return getIssuesForNode(entity);
-	    } else if (entity.type === 'way') {
-	      return getIssuesForWay(entity);
+	    if (showTile) {
+	      debugData.push({
+	        "class": 'red',
+	        label: 'tile'
+	      });
 	    }
 
-	    return [];
-
-	    function getIssuesForNode(node) {
-	      var parentWays = graph.parentWays(node);
+	    if (showCollision) {
+	      debugData.push({
+	        "class": 'yellow',
+	        label: 'collision'
+	      });
+	    }
 
-	      if (parentWays.length) {
-	        return getIssuesForVertex(node, parentWays);
-	      } else {
-	        return getIssuesForDetachedPoint(node);
-	      }
+	    if (showImagery) {
+	      debugData.push({
+	        "class": 'orange',
+	        label: 'imagery'
+	      });
 	    }
 
-	    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);
+	    if (showTouchTargets) {
+	      debugData.push({
+	        "class": 'pink',
+	        label: 'touchTargets'
+	      });
+	    }
 
-	      for (var i in parentRelations) {
-	        var relation = parentRelations[i];
-	        if (relation.tags.type === 'boundary') return 'boundary';
+	    if (showDownloaded) {
+	      debugData.push({
+	        "class": 'purple',
+	        label: 'downloaded'
+	      });
+	    }
 
-	        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 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
 
-	      return 'other';
-	    }
+	    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 */
+	    }); // downloaded
 
-	    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
+	    var osm = context.connection();
+	    var dataDownloaded = [];
 
-	      if (hypotenuseMeters < 1.5) return false;
-	      return true;
+	    if (osm && showDownloaded) {
+	      var rtree = osm.caches('get').tile.rtree;
+	      dataDownloaded = rtree.all().map(function (bbox) {
+	        return {
+	          type: 'Feature',
+	          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]]]
+	          }
+	        };
+	      });
 	    }
 
-	    function getIssuesForWay(way) {
-	      if (!shouldCheckWay(way)) return [];
-	      var issues = [],
-	          nodes = graph.childNodes(way);
+	    var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+	    downloaded.exit().remove();
+	    downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
-	      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);
-	      }
+	    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.
 
-	      return issues;
+
+	  drawDebug.enabled = function () {
+	    if (!arguments.length) {
+	      return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
+	    } else {
+	      return this;
 	    }
+	  };
 
-	    function getIssuesForVertex(node, parentWays) {
-	      var issues = [];
+	  return drawDebug;
+	}
 
-	      function checkForCloseness(node1, node2, way) {
-	        var issue = getWayIssueIfAny(node1, node2, way);
-	        if (issue) issues.push(issue);
-	      }
+	/*
+	    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.
+	*/
 
-	      for (var i = 0; i < parentWays.length; i++) {
-	        var parentWay = parentWays[i];
-	        if (!shouldCheckWay(parentWay)) continue;
-	        var lastIndex = parentWay.nodes.length - 1;
+	function svgDefs(context) {
+	  var _defsSelection = select(null);
 
-	        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);
-	            }
-	          }
+	  var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
-	          if (j !== lastIndex) {
-	            if (parentWay.nodes[j + 1] === node.id) {
-	              checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-	            }
-	          }
-	        }
-	      }
+	  function drawDefs(selection) {
+	    _defsSelection = selection.append('defs'); // add markers
 
-	      return issues;
+	    _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);
 	    }
 
-	    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
+	    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
 
-	      if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
+	    addSidedMarker('barrier', '#ddd', 1);
+	    addSidedMarker('man_made', '#fff', 0);
 
-	      if (wayType === 'indoor') return 0.01;
-	      if (wayType === 'building') return 0.05;
-	      if (wayType === 'path') return 0.1;
-	      return 0.2;
-	    }
+	    _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');
 
-	    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);
+	    _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
 
-	      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;
 
-	        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;
+	    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');
 
-	          for (var key in zAxisKeys) {
-	            var nodeValue = node.tags[key] || '0';
-	            var nearbyValue = nearby.tags[key] || '0';
+	    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
 
-	            if (nodeValue !== nearbyValue) {
-	              zAxisDifferentiates = true;
-	              break;
-	            }
-	          }
+	    _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
 
-	          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')
-	              })];
-	            }
-	          }));
-	        }
-	      }
 
-	      return issues;
+	    addSprites(_spritesheetIds, true);
+	  }
 
-	      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);
-	      }
-	    }
+	  function addSprites(ids, overrideColors) {
+	    _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
 
-	    function getWayIssueIfAny(node1, node2, way) {
-	      if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
-	        return null;
-	      }
+	    var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
 
-	      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;
-	      }
+	    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());
 
-	      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')
-	          })];
+	        if (overrideColors && d !== 'iD-sprite') {
+	          // allow icon colors to be overridden..
+	          select(node).selectAll('path').attr('fill', 'currentColor');
 	        }
+	      })["catch"](function () {
+	        /* ignore */
 	      });
+	    });
+	    spritesheets.exit().remove();
+	  }
 
-	      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;
+	  drawDefs.addSprites = addSprites;
+	  return drawDefs;
 	}
 
-	function validationCrossingWays(context) {
-	  var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
+	var _layerEnabled$2 = false;
 
-	  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);
+	var _qaService$2;
 
-	      for (var i = 0; i < parentRels.length; i++) {
-	        var rel = parentRels[i];
+	function svgKeepRight(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	        if (getFeatureType(rel, graph) !== null) {
-	          return rel;
-	        }
-	      }
-	    }
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	    return way;
-	  }
+	  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');
+	  } // Loosely-coupled keepRight service for fetching issues.
 
-	  function hasTag(tags, key) {
-	    return tags[key] !== undefined && tags[key] !== 'no';
-	  }
 
-	  function taggedAsIndoor(tags) {
-	    return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
-	  }
+	  function getService() {
+	    if (services.keepRight && !_qaService$2) {
+	      _qaService$2 = services.keepRight;
 
-	  function allowsBridge(featureType) {
-	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-	  }
+	      _qaService$2.on('loaded', throttledRedraw);
+	    } else if (!services.keepRight && _qaService$2) {
+	      _qaService$2 = null;
+	    }
 
-	  function allowsTunnel(featureType) {
-	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-	  } // discard
+	    return _qaService$2;
+	  } // Show the markers
 
 
-	  var ignoredBuildings = {
-	    demolished: true,
-	    dismantled: true,
-	    proposed: true,
-	    razed: true
-	  };
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	  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 editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      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.
 
-	  function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
-	    // assume 0 by default
-	    var level1 = tags1.level || '0';
-	    var level2 = tags2.level || '0';
 
-	    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
+	  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.
 
 
-	    var layer1 = tags1.layer || '0';
-	    var layer2 = tags2.layer || '0';
+	  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');
+	    });
+	  } // Update the issue markers
 
-	    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 updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$2) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    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
+	    var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	      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
+	    markers.exit().remove(); // enter
 
+	    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
 
-	    if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
-	    if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	    if (featureType1 === 'building' || featureType2 === 'building') {
-	      // for building crossings, different layers are enough
-	      if (layer1 !== layer2) return true;
-	    }
+	    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
 
-	    return false;
-	  } // highway values for which we shouldn't recommend connecting to waterways
+	    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);
 
-	  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 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];
+	    }
+	  } // Draw the keepRight layer and schedule loading issues and updating markers.
 
-	  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];
+	  function drawKeepRight(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	        if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-	          // one feature is a path but not both
-	          var roadFeature = entity1IsPath ? entity2 : entity1;
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	          if (nonCrossingHighways[roadFeature.tags.highway]) {
-	            // don't mark path connections with certain roads as crossings
-	            return {};
-	          }
+	    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);
 
-	          var pathFeature = entity1IsPath ? entity1 : entity2;
+	    if (_layerEnabled$2) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	          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
 
+	  drawKeepRight.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$2;
+	    _layerEnabled$2 = val;
 
-	          return bothLines ? {
-	            highway: 'crossing'
-	          } : {};
-	        }
+	    if (_layerEnabled$2) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	        return {};
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
 	      }
+	    }
 
-	      if (featureType1 === 'waterway') return {};
-	      if (featureType1 === 'railway') return {};
-	    } else {
-	      var featureTypes = [featureType1, featureType2];
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	      if (featureTypes.indexOf('highway') !== -1) {
-	        if (featureTypes.indexOf('railway') !== -1) {
-	          if (!bothLines) return {};
-	          var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
+	  drawKeepRight.supported = function () {
+	    return !!getService();
+	  };
 
-	          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
+	  return drawKeepRight;
+	}
 
-	            return {
-	              railway: 'crossing'
-	            };
-	          } else {
-	            // path-tram connections use this tag
-	            if (isTram) return {
-	              railway: 'tram_level_crossing'
-	            }; // other road-rail connections use this tag
+	function svgGeolocate(projection) {
+	  var layer = select(null);
 
-	            return {
-	              railway: 'level_crossing'
-	            };
-	          }
-	        }
+	  var _position;
 
-	        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;
+	  function init() {
+	    if (svgGeolocate.initialized) return; // run once
 
-	          if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
-	            // do not allow fords on major highways
-	            return null;
-	          }
+	    svgGeolocate.enabled = false;
+	    svgGeolocate.initialized = true;
+	  }
 
-	          return bothLines ? {
-	            ford: 'yes'
-	          } : {};
-	        }
-	      }
-	    }
+	  function showLayer() {
+	    layer.style('display', 'block');
+	  }
 
-	    return null;
+	  function hideLayer() {
+	    layer.transition().duration(250).style('opacity', 0);
 	  }
 
-	  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 layerOn() {
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+	  }
 
-	    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 = {};
+	  function layerOff() {
+	    layer.style('display', 'none');
+	  }
+
+	  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...
+
+	    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);
 
-	    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
+	    if (enabled) {
+	      update();
+	    } else {
+	      layerOff();
+	    }
+	  }
 
-	      segmentInfos = tree.waySegments(extent, graph);
+	  drawLocation.enabled = function (position, enabled) {
+	    if (!arguments.length) return svgGeolocate.enabled;
+	    _position = position;
+	    svgGeolocate.enabled = enabled;
 
-	      for (j = 0; j < segmentInfos.length; j++) {
-	        segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
+	    if (svgGeolocate.enabled) {
+	      showLayer();
+	      layerOn();
+	    } else {
+	      hideLayer();
+	    }
 
-	        if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
+	    return this;
+	  };
 
-	        if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
+	  init();
+	  return drawLocation;
+	}
 
-	        comparedWays[segment2Info.wayId] = true;
-	        way2 = graph.hasEntity(segment2Info.wayId);
-	        if (!way2) continue;
-	        taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
+	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;
 
-	        way2FeatureType = getFeatureType(taggedFeature2, graph);
+	  var _rdrawn = new RBush();
 
-	        if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
-	          continue;
-	        } // create only one issue for building crossings
+	  var _rskipped = new RBush();
 
+	  var _textWidthCache = {};
+	  var _entitybboxes = {}; // Listed from highest to lowest priority
 
-	        oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
-	        nAId = segment2Info.nodes[0];
-	        nBId = segment2Info.nodes[1];
+	  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]];
 
-	        if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
-	          // n1 or n2 is a connection node; skip
-	          continue;
-	        }
+	  function shouldSkipIcon(preset) {
+	    var noIcons = ['building', 'landuse', 'natural'];
+	    return noIcons.some(function (s) {
+	      return preset.id.indexOf(s) >= 0;
+	    });
+	  }
 
-	        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);
+	  function get(array, prop) {
+	    return function (d, i) {
+	      return array[i][prop];
+	    };
+	  }
 
-	        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
-	          });
+	  function textWidth(text, size, elem) {
+	    var c = _textWidthCache[size];
+	    if (!c) c = _textWidthCache[size] = {};
 
-	          if (oneOnly) {
-	            checkedSingleCrossingWays[way2.id] = true;
-	            break;
-	          }
-	        }
+	    if (c[text]) {
+	      return c[text];
+	    } else if (elem) {
+	      c[text] = elem.getComputedTextLength();
+	      return c[text];
+	    } 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);
 	      }
 	    }
-
-	    return edgeCrossInfos;
 	  }
 
-	  function waysToCheck(entity, graph) {
-	    var featureType = getFeatureType(entity, graph);
-	    if (!featureType) return [];
-
-	    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);
-	          }
-	        }
+	  function drawLinePaths(selection, entities, filter, classes, labels) {
+	    var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-	        return array;
-	      }, []);
-	    }
+	    paths.exit().remove(); // enter/update
 
-	    return [];
+	    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'));
 	  }
 
-	  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
-
-	    var wayIndex, crossingIndex, crossings;
+	  function drawLineLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	    for (wayIndex in ways) {
-	      crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
+	    texts.exit().remove(); // enter
 
-	      for (crossingIndex in crossings) {
-	        issues.push(createIssue(crossings[crossingIndex], graph));
-	      }
-	    }
+	    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
 
-	    return issues;
-	  };
+	    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 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;
+	  function drawPointLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	      if (type1 === type2) {
-	        return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-	      } else if (type1 === 'waterway') {
-	        return true;
-	      } else if (type2 === 'waterway') {
-	        return false;
-	      }
+	    texts.exit().remove(); // enter/update
 
-	      return type1 < type2;
-	    });
-	    var entities = crossing.wayInfos.map(function (wayInfo) {
-	      return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
+	    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);
 	    });
-	    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';
-	    }
+	  function drawAreaLabels(selection, entities, filter, classes, labels) {
+	    entities = entities.filter(hasText);
+	    labels = labels.filter(hasText);
+	    drawPointLabels(selection, entities, filter, classes, labels);
 
-	    if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-	      crossingTypeID += '_connectable';
+	    function hasText(d, i) {
+	      return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
 	    }
+	  }
 
-	    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
-	      },
-	      // 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 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 = [];
-
-	        if (connectionTags) {
-	          fixes.push(makeConnectWaysFix(this.data.connectionTags));
-	        }
-
-	        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 skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
+	  function drawAreaIcons(selection, entities, filter, classes, labels) {
+	    var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	          if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-	            fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-	          }
-	        } // repositioning the features is always an option
+	    icons.exit().remove(); // 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;
 
-	        fixes.push(new validationIssueFix({
-	          icon: 'iD-operation-move',
-	          title: _t.html('issues.fix.reposition_features.title')
-	        }));
-	        return fixes;
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-15' : '');
 	      }
 	    });
-
-	    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 drawCollisionBoxes(selection, rtree, which) {
+	    var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+	    var gj = [];
 
-	        var crossingLoc = this.issue.loc;
-	        var projection = context.projection;
+	    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 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 boxes = selection.selectAll('.' + which).data(gj); // exit
 
-	          var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
+	    boxes.exit().remove(); // enter/update
 
-	          if (!structLengthMeters) {
-	            // if no explicit width is set, approximate the width based on the tags
-	            structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-	          }
+	    boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+	  }
 
-	          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;
-	          }
+	  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;
 
-	          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
+	    for (i = 0; i < labelStack.length; i++) {
+	      labelable.push([]);
+	    }
 
-	          structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
+	    if (fullRedraw) {
+	      _rdrawn.clear();
 
-	          structLengthMeters += 4; // clamp the length to a reasonable range
+	      _rskipped.clear();
 
-	          structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+	      _entitybboxes = {};
+	    } else {
+	      for (i = 0; i < entities.length; i++) {
+	        entity = entities[i];
+	        var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-	          function geomToProj(geoPoint) {
-	            return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
-	          }
+	        for (j = 0; j < toRemove.length; j++) {
+	          _rdrawn.remove(toRemove[j]);
 
-	          function projToGeom(projPoint) {
-	            var lat = geoMetersToLat(projPoint[1]);
-	            return [geoMetersToLon(projPoint[0], lat), lat];
-	          }
+	          _rskipped.remove(toRemove[j]);
+	        }
+	      }
+	    } // Loop through all the entities to do some preprocessing
 
-	          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]);
-	          }
+	    for (i = 0; i < entities.length; i++) {
+	      entity = entities[i];
+	      geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-	          var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
-	            return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-	          };
+	      if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+	        var hasDirections = entity.directions(graph, projection).length;
+	        var markerPadding;
 
-	          var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
-	            return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-	          }; // avoid creating very short edges from splitting too close to another node
+	        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
 
-	          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
+	      if (geometry === 'vertex') {
+	        geometry = 'point';
+	      } // Determine which entities are label-able
 
-	            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;
-	                    }
-	                  }
-	                });
-	              });
+	      var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+	      var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	      if (!icon && !utilDisplayName(entity)) continue;
 
-	              if (edgeCount >= 3) {
-	                // the end node is a junction, try to leave a segment
-	                // between it and the structure - #7202
-	                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+	      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 (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 (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+	          labelable[k].push(entity);
+	          break;
+	        }
+	      }
+	    }
 
+	    var positions = {
+	      point: [],
+	      line: [],
+	      area: []
+	    };
+	    var labelled = {
+	      point: [],
+	      line: [],
+	      area: []
+	    }; // Try and find a valid label for labellable entities
 
-	            if (!newNode) newNode = endNode;
-	            var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
-	            // do the split
+	    for (k = 0; k < labelable.length; k++) {
+	      var fontSize = labelStack[k][3];
 
-	            graph = splitAction(graph);
+	      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 (splitAction.getCreatedWayIDs().length) {
-	              resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-	            }
+	        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);
+	        }
 
-	            return newNode;
-	          }
+	        if (p) {
+	          if (geometry === 'vertex') {
+	            geometry = 'point';
+	          } // treat vertex like point
 
-	          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
 
-	          if (bridgeOrTunnel === 'bridge') {
-	            tags.bridge = 'yes';
-	            tags.layer = '1';
-	          } else {
-	            var tunnelValue = 'yes';
+	          p.classes = geometry + ' tag-' + labelStack[k][1];
+	          positions[geometry].push(p);
+	          labelled[geometry].push(entity);
+	        }
+	      }
+	    }
 
-	            if (getFeatureType(structureWay, graph) === 'waterway') {
-	              // use `tunnel=culvert` for waterways by default
-	              tunnelValue = 'culvert';
-	            }
+	    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;
+	      });
+	    }
 
-	            tags.tunnel = tunnelValue;
-	            tags.layer = '-1';
-	          } // apply the structure tags to the way
+	    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;
 
-	          graph = actionChangeTags(structureWay.id, tags)(graph);
-	          return graph;
+	      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
 	        };
+	      }
 
-	        context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-	        context.enter(modeSelect(context, resultWayIDs));
+	      if (tryInsert([bbox], entity.id, true)) {
+	        return p;
 	      }
-	    });
-	  }
+	    }
 
-	  function makeConnectWaysFix(connectionTags) {
-	    var fixTitleID = 'connect_features';
+	    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
 
-	    if (connectionTags.ford) {
-	      fixTitleID = 'connect_using_ford';
-	    }
+	      var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+	      var padding = 3;
 
-	    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 closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc); // if there is already a point nearby, use that
+	      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.
 
-	            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);
-	            }
-	          });
+	        var sub = subpath(points, start, start + width);
 
-	          if (nodesToMerge.length > 1) {
-	            // if we're using nearby nodes, merge them with the new node
-	            graph = actionMergeNodes(nodesToMerge, loc)(graph);
-	          }
+	        if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+	          continue;
+	        }
 
-	          return graph;
-	        }, _t('issues.fix.connect_crossing_features.annotation'));
-	      }
-	    });
-	  }
+	        var isReverse = reverse(sub);
 
-	  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
+	        if (isReverse) {
+	          sub = sub.reverse();
+	        }
 
-	        var layer = tags.layer && Number(tags.layer);
+	        var bboxes = [];
+	        var boxsize = (height + 2) / 2;
 
-	        if (layer && !isNaN(layer)) {
-	          if (higherOrLower === 'higher') {
-	            layer += 1;
-	          } else {
-	            layer -= 1;
-	          }
-	        } else {
-	          if (higherOrLower === 'higher') {
-	            layer = 1;
-	          } else {
-	            layer = -1;
+	        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)
+	            });
 	          }
 	        }
 
-	        tags.layer = layer.toString();
-	        context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+	        if (tryInsert(bboxes, entity.id, false)) {
+	          // accept this one
+	          return {
+	            'font-size': height + 2,
+	            lineString: lineString(sub),
+	            startOffset: offset + '%'
+	          };
+	        }
 	      }
-	    });
-	  }
 
-	  validation.type = type;
-	  return validation;
-	}
+	      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);
+	      }
 
-	function validationDisconnectedWay() {
-	  var type = 'disconnected_way';
+	      function lineString(points) {
+	        return 'M' + points.join('L');
+	      }
 
-	  function isTaggedAsHighway(entity) {
-	    return osmRoutableHighwayTagValues[entity.tags.highway];
-	  }
+	      function subpath(points, from, to) {
+	        var sofar = 0;
+	        var start, end, i0, i1;
 
-	  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
-	    })];
+	        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 makeFixes(context) {
-	      var fixes = [];
-	      var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+	          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 (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 (!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;
+	          }
 
-	        if (!fixes.length) {
-	          fixes.push(new validationIssueFix({
-	            title: _t.html('issues.fix.connect_feature.title')
-	          }));
+	          sofar += current;
 	        }
 
-	        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]);
-
-	            if (!operation.disabled()) {
-	              operation();
-	            }
-	          }
-	        }));
-	      } else {
-	        fixes.push(new validationIssueFix({
-	          title: _t.html('issues.fix.connect_features.title')
-	        }));
+	        var result = points.slice(i0, i1);
+	        result.unshift(start);
+	        result.push(end);
+	        return result;
 	      }
-
-	      return fixes;
 	    }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
-	    }
+	    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 = {};
 
-	    function routingIslandForEntity(entity) {
-	      var routingIsland = new Set(); // the interconnected routable features
+	      if (picon) {
+	        // icon and label..
+	        if (addIcon()) {
+	          addLabel(iconSize + padding);
+	          return p;
+	        }
+	      } else {
+	        // label only..
+	        if (addLabel(0)) {
+	          return p;
+	        }
+	      }
 
-	      var waysToCheck = []; // the queue of remaining routable ways to traverse
+	      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
+	        };
 
-	      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);
-	          }
-	        });
-	      }
+	        if (tryInsert([bbox], entity.id + 'I', true)) {
+	          p.transform = 'translate(' + iconX + ',' + iconY + ')';
+	          return true;
+	        }
 
-	      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;
+	        return false;
 	      }
 
-	      while (waysToCheck.length) {
-	        var wayToCheck = waysToCheck.pop();
-	        var childNodes = graph.childNodes(wayToCheck);
-
-	        for (var i in childNodes) {
-	          var vertex = childNodes[i];
+	      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 (isConnectedVertex(vertex)) {
-	            // found a link to the wider network, not a routing island
-	            return null;
+	          if (tryInsert([bbox], entity.id, true)) {
+	            p.x = labelX;
+	            p.y = labelY;
+	            p.textAnchor = 'middle';
+	            p.height = height;
+	            return true;
 	          }
+	        }
 
-	          if (isRoutableNode(vertex)) {
-	            routingIsland.add(vertex);
-	          }
+	        return false;
+	      }
+	    } // force insert a singular bounding box
+	    // singular box only, no array, id better be unique
 
-	          queueParentWays(vertex);
-	        }
-	      } // no network link found, this is a routing island, return its members
 
+	    function doInsert(bbox, id) {
+	      bbox.id = id;
+	      var oldbox = _entitybboxes[id];
 
-	      return routingIsland;
-	    }
+	      if (oldbox) {
+	        _rdrawn.remove(oldbox);
+	      }
 
-	    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
+	      _entitybboxes[id] = bbox;
 
-	      if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
-	      if (vertex.tags.amenity === 'parking_entrance') return true;
-	      return false;
+	      _rdrawn.insert(bbox);
 	    }
 
-	    function isRoutableNode(node) {
-	      // treat elevators as distinct features in the highway network
-	      if (node.tags.highway === 'elevator') return true;
-	      return false;
-	    }
+	    function tryInsert(bboxes, id, saveSkipped) {
+	      var skipped = false;
 
-	    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;
-	      });
-	    }
+	      for (var i = 0; i < bboxes.length; i++) {
+	        var bbox = bboxes[i];
+	        bbox.id = id; // Check that label is visible
 
-	    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
+	        if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+	          skipped = true;
+	          break;
+	        }
 
-	          var map = context.map();
+	        if (_rdrawn.collides(bbox)) {
+	          skipped = true;
+	          break;
+	        }
+	      }
 
-	          if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	            map.zoomToEase(vertex);
-	          }
+	      _entitybboxes[id] = bboxes;
 
-	          context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+	      if (skipped) {
+	        if (saveSkipped) {
+	          _rskipped.load(bboxes);
 	        }
-	      });
+	      } else {
+	        _rdrawn.load(bboxes);
+	      }
+
+	      return !skipped;
 	    }
-	  };
 
-	  validation.type = type;
-	  return validation;
-	}
+	    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
 
-	function validationFormatting() {
-	  var type = 'invalid_format';
+	    drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+	    drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-	  var validation = function validation(entity) {
-	    var issues = [];
+	    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
 
-	    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
+	    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
 
-	      return !email || valid_email.test(email);
-	    }
-	    /*
-	    function isSchemePresent(url) {
-	        var valid_scheme = /^https?:\/\//i;
-	        return (!url || valid_scheme.test(url));
-	    }
-	    */
+	    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');
+	    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
+	      };
 
-	    function showReferenceEmail(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
-	    }
-	    /*
-	    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' : ''
-	            }));
-	        }
-	    }
-	    */
+	      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)
 
-	    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 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' : ''
-	        }));
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = graph.hasEntity(selectedIDs[i]);
+
+	      if (entity && entity.type === 'node') {
+	        ids.push(selectedIDs[i]);
 	      }
 	    }
 
-	    return issues;
-	  };
+	    layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
 
-	  validation.type = type;
-	  return validation;
-	}
+	    var debug = selection.selectAll('.labels-group.debug');
+	    var gj = [];
 
-	function validationHelpRequest(context) {
-	  var type = 'help_request';
+	    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 validation = function checkFixmeTag(entity) {
-	    if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
+	    var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-	    if (entity.version === undefined) return [];
+	    box.exit().remove(); // enter/update
 
-	    if (entity.v !== undefined) {
-	      var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
+	    box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+	  }
 
-	      if (!baseEntity || !baseEntity.tags.fixme) return [];
-	    }
+	  var throttleFilterLabels = throttle(filterLabels, 100);
 
-	    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())
-	        }) : '';
-	      },
-	      dynamicFixes: function dynamicFixes() {
-	        return [new validationIssueFix({
-	          title: _t.html('issues.fix.address_the_concern.title')
-	        })];
-	      },
-	      reference: showReference,
-	      entityIds: [entity.id]
-	    })];
+	  drawLabels.observe = function (selection) {
+	    var listener = function listener() {
+	      throttleFilterLabels(selection);
+	    };
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
-	    }
+	    selection.on('mousemove.hidelabels', listener);
+	    context.on('enter.hidelabels', listener);
 	  };
 
-	  validation.type = type;
-	  return validation;
-	}
+	  drawLabels.off = function (selection) {
+	    throttleFilterLabels.cancel();
+	    selection.on('mousemove.hidelabels', null);
+	    context.on('enter.hidelabels', null);
+	  };
 
-	function validationImpossibleOneway() {
-	  var type = 'impossible_oneway';
+	  return drawLabels;
+	}
 
-	  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);
+	var _layerEnabled$1 = false;
 
-	    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;
-	    }
+	var _qaService$1;
 
-	    function isOneway(way) {
-	      if (way.tags.oneway === 'yes') return true;
-	      if (way.tags.oneway) return false;
+	function svgImproveOSM(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	      for (var key in way.tags) {
-	        if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-	          return true;
-	        }
-	      }
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	      return 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');
+	  } // Loosely-coupled improveOSM service for fetching issues
 
-	    function nodeOccursMoreThanOnce(way, nodeID) {
-	      var occurrences = 0;
 
-	      for (var index in way.nodes) {
-	        if (way.nodes[index] === nodeID) {
-	          occurrences += 1;
-	          if (occurrences > 1) return true;
-	        }
-	      }
+	  function getService() {
+	    if (services.improveOSM && !_qaService$1) {
+	      _qaService$1 = services.improveOSM;
 
-	      return false;
+	      _qaService$1.on('loaded', throttledRedraw);
+	    } else if (!services.improveOSM && _qaService$1) {
+	      _qaService$1 = null;
 	    }
 
-	    function isConnectedViaOtherTypes(way, node) {
-	      var wayType = typeForWay(way);
+	    return _qaService$1;
+	  } // Show the markers
 
-	      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;
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	        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
 
-	          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
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      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.
 
-	            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;
-	      });
-	    }
+	  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.
 
-	    function issuesForNode(way, nodeID) {
-	      var isFirst = nodeID === way.first();
-	      var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-	      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
+	  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');
+	    });
+	  } // Update the issue markers
 
-	      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
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$1) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	      if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+	    var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	      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 [];
-	      }
+	    markers.exit().remove(); // enter
 
-	      var placement = isFirst ? 'start' : 'end',
-	          messageID = wayType + '.',
-	          referenceID = wayType + '.';
+	    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;
 
-	      if (wayType === 'waterway') {
-	        messageID += 'connected.' + placement;
-	        referenceID += 'connected';
+	      if (!picon) {
+	        return '';
 	      } else {
-	        messageID += placement;
-	        referenceID += placement;
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
 	      }
+	    }); // update
 
-	      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 = [];
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	          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
-	                }));
-	              }
-	            }));
-	          }
+	    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
 
-	          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);
-	              }
-	            }));
-	          }
+	    targets.exit().remove(); // enter/update
 
-	          return fixes;
-	        },
-	        loc: node.loc
-	      })];
+	    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 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'));
-	        };
-	      }
+	    function sortY(a, b) {
+	      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.
 
-	  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 drawImproveOSM(selection) {
+	    var service = getService();
+	    var surface = context.surface();
+
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
-	    context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
-	  }
+	    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);
 
-	  validation.type = type;
-	  return validation;
-	}
+	    if (_layerEnabled$1) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	function validationIncompatibleSource() {
-	  var type = 'incompatible_source';
-	  var invalidSources = [{
-	    id: 'google',
-	    regex: 'google',
-	    exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
-	  }];
 
-	  var validation = function checkIncompatibleSource(entity) {
-	    var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
-	    if (!entitySources) return [];
-	    var issues = [];
-	    invalidSources.forEach(function (invalidSource) {
-	      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;
-	      });
-	      if (!hasInvalidSource) return;
-	      issues.push(new validationIssue({
-	        type: type,
-	        severity: 'warning',
-	        message: function message(context) {
-	          var entity = context.hasEntity(this.entityIds[0]);
-	          return entity ? _t.html('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
-	            feature: utilDisplayLabel(entity, context.graph())
-	          }) : '';
-	        },
-	        reference: getReference(invalidSource.id),
-	        entityIds: [entity.id],
-	        dynamicFixes: function dynamicFixes() {
-	          return [new validationIssueFix({
-	            title: _t.html('issues.fix.remove_proprietary_data.title')
-	          })];
-	        }
-	      }));
-	    });
-	    return issues;
+	  drawImproveOSM.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$1;
+	    _layerEnabled$1 = val;
 
-	    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.' + id + '.reference'));
-	      };
+	    if (_layerEnabled$1) {
+	      layerOn();
+	    } else {
+	      layerOff();
+
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
+
+	    dispatch.call('change');
+	    return this;
 	  };
 
-	  validation.type = type;
-	  return validation;
+	  drawImproveOSM.supported = function () {
+	    return !!getService();
+	  };
+
+	  return drawImproveOSM;
 	}
 
-	function validationMaprules() {
-	  var type = 'maprules';
+	var _layerEnabled = false;
 
-	  var validation = function checkMaprules(entity, graph) {
-	    if (!services.maprules) return [];
-	    var rules = services.maprules.validationRules();
-	    var issues = [];
+	var _qaService;
 
-	    for (var i = 0; i < rules.length; i++) {
-	      var rule = rules[i];
-	      rule.findIssues(entity, graph, issues);
+	function svgOsmose(projection, context, dispatch) {
+	  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');
+	  } // Loosely-coupled osmose service for fetching issues
+
+
+	  function getService() {
+	    if (services.osmose && !_qaService) {
+	      _qaService = services.osmose;
+
+	      _qaService.on('loaded', throttledRedraw);
+	    } else if (!services.osmose && _qaService) {
+	      _qaService = null;
 	    }
 
-	    return issues;
-	  };
+	    return _qaService;
+	  } // Show the markers
 
-	  validation.type = type;
-	  return validation;
-	}
 
-	function validationMismatchedGeometry() {
-	  var type = 'mismatched_geometry';
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	  function tagSuggestingLineIsArea(entity) {
-	    if (entity.type !== 'way' || entity.isClosed()) return null;
-	    var tagSuggestingArea = entity.tagSuggestingArea();
 
-	    if (!tagSuggestingArea) {
-	      return null;
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      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.
 
-	    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;
-	    }
+	  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.
 
-	    return tagSuggestingArea;
-	  }
 
-	  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
+	  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');
+	    });
+	  } // Update the issue markers
 
-	    if (firstToLastDistanceMeters < 0.75) {
-	      testNodes = nodes.slice(); // shallow copy
 
-	      testNodes.pop();
-	      testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	      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
+	    var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    markers.exit().remove(); // enter
 
-	    testNodes = nodes.slice(); // shallow copy
+	    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;
 
-	    testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    }); // update
 
-	    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'));
-	      };
-	    }
-	  }
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	  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'),
-	          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
+	    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
 
-	            for (var key in tagSuggestingArea) {
-	              delete tags[key];
-	            }
+	    targets.exit().remove(); // enter/update
 
-	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
-	          }
-	        }));
-	        return fixes;
-	      }
-	    });
+	    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 showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
+	    function sortY(a, b) {
+	      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.
 
-	  function vertexTaggedAsPointIssue(entity, graph) {
-	    // we only care about nodes
-	    if (entity.type !== 'node') return null; // ignore tagless points
 
-	    if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
+	  function drawOsmose(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	    if (entity.isOnAddressLine(graph)) return null;
-	    var geometry = entity.geometry(graph);
-	    var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	    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')
-	          }) : '';
-	        },
-	        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')
-	          }) : '';
-	        },
-	        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: function dynamicFixes(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.perform(action, _t('operations.extract.annotation', {
-	                n: 1
-	              })); // re-enter mode to trigger updates
-
-	              context.enter(modeSelect(context, [action.getExtractedNodeID()]));
-	            };
-	          }
+	    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);
 
-	          return [new validationIssueFix({
-	            icon: 'iD-operation-extract',
-	            title: _t.html('issues.fix.extract_point.title'),
-	            onClick: extractOnClick
-	          })];
-	        }
-	      });
+	    if (_layerEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
 	    }
+	  } // Toggles the layer on and off
 
-	    return null;
-	  }
-
-	  function unclosedMultipolygonPartIssues(entity, graph) {
-	    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 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
+	  drawOsmose.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled;
+	    _layerEnabled = val;
 
-	      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())
-	          }) : '';
-	        },
-	        reference: showReference,
-	        loc: sequence.nodes[0].loc,
-	        entityIds: [entity.id],
-	        hash: sequence.map(function (way) {
-	          return way.id;
-	        }).join()
+	    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
 	      });
-	      issues.push(issue);
-	    }
-
-	    return issues;
+	    } else {
+	      layerOff();
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
-	  }
 
-	  var validation = function checkMismatchedGeometry(entity, graph) {
-	    var issues = [vertexTaggedAsPointIssue(entity, graph), lineTaggedAsAreaIssue(entity)];
-	    issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-	    return issues.filter(Boolean);
+	    dispatch.call('change');
+	    return this;
 	  };
 
-	  validation.type = type;
-	  return validation;
-	}
+	  drawOsmose.supported = function () {
+	    return !!getService();
+	  };
 
-	function validationMissingRole() {
-	  var type = 'missing_role';
+	  return drawOsmose;
+	}
 
-	  var validation = function checkMissingRole(entity, graph) {
-	    var issues = [];
+	function svgStreetside(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    if (entity.type === 'way') {
-	      graph.parentRelations(entity).forEach(function (relation) {
-	        if (!relation.isMultipolygon()) return;
-	        var member = relation.memberById(entity.id);
+	  var minZoom = 14;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
+	  var _viewerYaw = 0;
+	  var _selectedSequence = null;
 
-	        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);
+	  var _streetside;
+	  /**
+	   * init().
+	   */
 
-	        if (way && isMissingRole(member)) {
-	          issues.push(makeIssue(way, entity, member));
-	        }
-	      });
-	    }
 
-	    return issues;
-	  };
+	  function init() {
+	    if (svgStreetside.initialized) return; // run once
 
-	  function isMissingRole(member) {
-	    return !member.role || !member.role.trim().length;
+	    svgStreetside.enabled = false;
+	    svgStreetside.initialized = true;
 	  }
+	  /**
+	   * getService().
+	   */
 
-	  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 getService() {
+	    if (services.streetside && !_streetside) {
+	      _streetside = services.streetside;
+
+	      _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+	    } else if (!services.streetside && _streetside) {
+	      _streetside = null;
 	    }
-	  }
 
-	  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
-	        }));
-	      }
-	    });
+	    return _streetside;
 	  }
+	  /**
+	   * showLayer().
+	   */
 
-	  validation.type = type;
-	  return validation;
-	}
-
-	function validationMissingTag(context) {
-	  var type = 'missing_tag';
 
-	  function hasDescriptiveTags(entity, graph) {
-	    var keys = Object.keys(entity.tags).filter(function (k) {
-	      if (k === 'area' || k === 'name') {
-	        return false;
-	      } else {
-	        return osmIsInterestingTag(k);
-	      }
+	  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 (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
-	      // 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);
-	    }
-
-	    return keys.length > 0;
 	  }
+	  /**
+	   * hideLayer().
+	   */
 
-	  function isUnknownRoad(entity) {
-	    return entity.type === 'way' && entity.tags.highway === 'road';
-	  }
 
-	  function isUntypedRelation(entity) {
-	    return entity.type === 'relation' && !entity.tags.type;
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
 	  }
+	  /**
+	   * editOn().
+	   */
 
-	  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';
-	    }
 
-	    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..
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+	  /**
+	   * editOff().
+	   */
 
-	    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]);
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+	  /**
+	   * click() Handles 'bubble' point click event.
+	   */
 
-	            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 click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
+	    if (d.sequenceKey !== _selectedSequence) {
+	      _viewerYaw = 0; // reset
 	    }
-	  };
 
-	  validation.type = type;
-	  return validation;
-	}
+	    _selectedSequence = d.sequenceKey;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
+	  /**
+	   * mouseover().
+	   */
 
-	var simplify = function simplify(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());
-	};
 
-	// {
-	//   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"
-	// }
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
+	  /**
+	   * mouseout().
+	   */
+
 
-	var to_parts = function to_parts(kvnd) {
-	  var parts = {};
-	  parts.kvnd = kvnd;
-	  var kvndparts = kvnd.split('~', 2);
-	  if (kvndparts.length > 1) parts.d = kvndparts[1];
-	  parts.kvn = kvndparts[0];
-	  var kvnparts = parts.kvn.split('|', 2);
-	  if (kvnparts.length > 1) parts.n = kvnparts[1];
-	  parts.kv = kvnparts[0];
-	  var kvparts = parts.kv.split('/', 2);
-	  parts.k = kvparts[0];
-	  parts.v = kvparts[1];
-	  parts.nsimple = simplify(parts.n);
-	  parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-	  return parts;
-	};
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
+	  /**
+	   * transform().
+	   */
 
-	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;
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
+	    var rot = d.ca + _viewerYaw;
 
-	var matcher$1 = function matcher() {
-	  var _warnings = []; // array of match conflict pairs
+	    if (rot) {
+	      t += ' rotate(' + Math.floor(rot) + ',0,0)';
+	    }
 
-	  var _ambiguous = {};
-	  var _matchIndex = {};
-	  var matcher = {}; // Create an index of all the keys/simplenames for fast matching
+	    return t;
+	  }
 
-	  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 viewerChanged() {
+	    var service = getService();
+	    if (!service) return;
+	    var viewer = service.viewer();
+	    if (!viewer) return; // update viewfield rotation
 
-	    function insertNames(kvnd, which) {
-	      var obj = brands[kvnd];
-	      var parts = to_parts(kvnd); // 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.
+	    _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+	    // e.g. during drags or easing.
 
-	      if (which === 'secondary' && parts.d) return;
+	    if (context.map().isTransformed()) return;
+	    layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+	  }
 
-	      if (obj.countryCodes) {
-	        parts.countryCodes = obj.countryCodes.slice(); // copy
-	      }
+	  function filterBubbles(bubbles) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	      var nomatches = obj.nomatch || [];
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	      if (nomatches.some(function (s) {
-	        return s === kvnd;
-	      })) {
-	        console.log("WARNING match/nomatch conflict for ".concat(kvnd));
-	        return;
-	      }
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	      var match_kv = [parts.kv].concat(obj.matchTags || []).concat(["".concat(parts.k, "/yes"), "building/yes"]) // #3454 - match some generic tags
-	      .map(function (s) {
-	        return s.toLowerCase();
+	    if (usernames) {
+	      bubbles = bubbles.filter(function (bubble) {
+	        return usernames.indexOf(bubble.captured_by) !== -1;
 	      });
-	      var match_nsimple = [];
+	    }
 
-	      if (which === 'primary') {
-	        match_nsimple = [parts.n].concat(obj.matchNames || []).concat(obj.tags.official_name || []) // #2732 - match alternate names
-	        .map(simplify);
-	      } 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);
-	      }
+	    return bubbles;
+	  }
 
-	      if (!match_nsimple.length) return; // nothing to do
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	      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;
-	          } 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, "".concat(kvnd, " (").concat(kv, "/").concat(nsimple, ")")]);
-	              }
-	            } else {
-	              _matchIndex[kv][nsimple] = parts; // insert
-	            }
-	          }
-	        });
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
 	      });
 	    }
-	  }; // pass a `key`, `value`, `name` and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
 
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	  matcher.matchKVN = function (key, value, name, countryCode) {
-	    return matcher.matchParts(to_parts("".concat(key, "/").concat(value, "|").concat(name)), countryCode);
-	  }; // pass a parts object and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequences) {
+	        return usernames.indexOf(sequences.properties.captured_by) !== -1;
+	      });
+	    }
 
+	    return sequences;
+	  }
+	  /**
+	   * update().
+	   */
 
-	  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; // try to return an exact match
+	  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 = [];
 
-	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) return match; // look in match groups
+	    if (context.photos().showsPanoramic()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      bubbles = service && showMarkers ? service.bubbles(projection) : [];
+	      sequences = filterSequences(sequences);
+	      bubbles = filterBubbles(bubbles);
+	    }
 
-	    for (var mg in matchGroups$1) {
-	      var matchGroup = matchGroups$1[mg];
-	      match = null;
-	      inGroup = false;
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	      for (var i = 0; i < matchGroup.length; i++) {
-	        var otherkv = matchGroup[i].toLowerCase();
+	    traces.exit().remove(); // enter/update
 
-	        if (!inGroup) {
-	          inGroup = otherkv === parts.kv;
-	        }
+	    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
 
-	        if (!match) {
-	          // fixme: we currently return a single match for ambiguous
-	          match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-	        }
+	    groups.exit().remove(); // enter
 
-	        if (!match) {
-	          match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-	        }
+	    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
 
-	        if (match && !matchesCountryCode(match)) {
-	          match = null;
-	        }
+	    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
 
-	        if (inGroup && match) {
-	          return match;
-	        }
-	      }
-	    }
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	    return null;
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	    function matchesCountryCode(match) {
-	      if (!countryCode) return true;
-	      if (!match.countryCodes) return true;
-	      return match.countryCodes.indexOf(countryCode) !== -1;
+	      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';
+	      }
 	    }
-	  };
-
-	  matcher.getWarnings = function () {
-	    return _warnings;
-	  };
-
-	  return matcher;
-	};
+	  }
+	  /**
+	   * drawImages()
+	   * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+	   * 'svgStreetside()' is called from index.js
+	   */
 
-	var fromCharCode = String.fromCharCode;
-	var nativeFromCodePoint = String.fromCodePoint;
 
-	// length should be 1, old FF problem
-	var INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;
+	  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);
 
-	// `String.fromCodePoint` method
-	// https://tc39.github.io/ecma262/#sec-string.fromcodepoint
-	_export({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
-	  fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars
-	    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('');
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadBubbles(projection);
+	      } else {
+	        editOff();
+	      }
+	    }
 	  }
-	});
+	  /**
+	   * drawImages.enabled().
+	   */
 
-	var quickselect$2 = 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);
-	    }
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgStreetside.enabled;
+	    svgStreetside.enabled = _;
 
-	    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);
-	        }
+	    if (svgStreetside.enabled) {
+	      showLayer();
+	      context.photos().on('change.streetside', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.streetside', null);
+	    }
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) swap(arr, left, right);
+	    dispatch.call('change');
+	    return this;
+	  };
+	  /**
+	   * drawImages.supported().
+	   */
 
-	        while (i < j) {
-	          swap(arr, i, j);
-	          i++;
-	          j--;
 
-	          while (compare(arr[i], t) < 0) {
-	            i++;
-	          }
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	          while (compare(arr[j], t) > 0) {
-	            j--;
-	          }
-	        }
+	  init();
+	  return drawImages;
+	}
 
-	        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;
-	      }
-	    }
+	function svgMapillaryImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    function swap(arr, i, j) {
-	      var tmp = arr[i];
-	      arr[i] = arr[j];
-	      arr[j] = tmp;
-	    }
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	    function defaultCompare(a, b) {
-	      return a < b ? -1 : a > b ? 1 : 0;
-	    }
+	  var _mapillary;
 
-	    return quickselect;
-	  });
-	});
+	  function init() {
+	    if (svgMapillaryImages.initialized) return; // run once
 
-	var rbush_1 = rbush;
-	var _default$2 = rbush;
+	    svgMapillaryImages.enabled = false;
+	    svgMapillaryImages.initialized = true;
+	  }
 
-	function rbush(maxEntries, format) {
-	  if (!(this instanceof rbush)) return new rbush(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	  this._maxEntries = Math.max(4, maxEntries || 9);
-	  this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+	      _mapillary.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	  if (format) {
-	    this._initFormat(format);
+	    return _mapillary;
 	  }
 
-	  this.clear();
-	}
+	  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');
+	    });
+	  }
 
-	rbush.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;
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	    while (node) {
-	      for (i = 0, len = node.children.length; i < len; i++) {
-	        child = node.children[i];
-	        childBBox = node.leaf ? toBBox(child) : child;
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        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);
-	        }
-	      }
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	      node = nodesToSearch.pop();
-	    }
+	  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);
+	  }
 
-	    return result;
-	  },
-	  collides: function collides(bbox) {
-	    var node = this.data,
-	        toBBox = this.toBBox;
-	    if (!intersects$1(bbox, node)) return false;
-	    var nodesToSearch = [],
-	        i,
-	        len,
-	        child,
-	        childBBox;
+	  function mouseover(d3_event, image) {
+	    var service = getService();
+	    if (service) service.setStyles(context, image);
+	  }
 
-	    while (node) {
-	      for (i = 0, len = node.children.length; i < len; i++) {
-	        child = node.children[i];
-	        childBBox = node.leaf ? toBBox(child) : child;
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
-	        if (intersects$1(bbox, childBBox)) {
-	          if (node.leaf || contains$1(bbox, childBBox)) return true;
-	          nodesToSearch.push(child);
-	        }
-	      }
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	      node = nodesToSearch.pop();
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
-	    return false;
-	  },
-	  load: function load(data) {
-	    if (!(data && data.length)) return this;
-
-	    if (data.length < this._minEntries) {
-	      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
-
-
-	    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;
-	    } 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
+	    return t;
+	  }
 
+	  function filterImages(images) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	      this._insert(node, this.data.height - node.height - 1, true);
+	    if (!showsPano || !showsFlat) {
+	      images = images.filter(function (image) {
+	        if (image.is_pano) return showsPano;
+	        return showsFlat;
+	      });
 	    }
 
-	    return this;
-	  },
-	  insert: function insert(item) {
-	    if (item) this._insert(item, this.data.height - 1);
-	    return this;
-	  },
-	  clear: function clear() {
-	    this.data = createNode$1([]);
-	    return this;
-	  },
-	  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
-
-	    while (node || path.length) {
-	      if (!node) {
-	        // go up
-	        node = path.pop();
-	        parent = path[path.length - 1];
-	        i = indexes.pop();
-	        goingUp = true;
-	      }
+	    if (fromDate) {
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+	      });
+	    }
 
-	      if (node.leaf) {
-	        // check current node
-	        index = findItem$1(item, node.children, equalsFn);
+	    if (toDate) {
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+	      });
+	    }
 
-	        if (index !== -1) {
-	          // item found, remove the item and condense tree upwards
-	          node.children.splice(index, 1);
-	          path.push(node);
+	    return images;
+	  }
 
-	          this._condense(path);
+	  function filterSequences(sequences) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	          return this;
+	    if (!showsPano || !showsFlat) {
+	      sequences = sequences.filter(function (sequence) {
+	        if (sequence.properties.hasOwnProperty('is_pano')) {
+	          if (sequence.properties.is_pano) return showsPano;
+	          return showsFlat;
 	        }
-	      }
-
-	      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
 
+	        return false;
+	      });
 	    }
 
-	    return this;
-	  },
-	  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;
-	  },
-	  _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();
+	    if (fromDate) {
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+	      });
 	    }
 
-	    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$1(items.slice(left, right + 1));
-	      calcBBox$1(node, this.toBBox);
-	      return node;
+	    if (toDate) {
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+	      });
 	    }
 
-	    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
+	    return sequences;
+	  }
 
-	      M = Math.ceil(N / Math.pow(M, height - 1));
-	    }
+	  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
 
-	    node = createNode$1([]);
-	    node.leaf = false;
-	    node.height = height; // split the items into M mostly square tiles
+	    traces.exit().remove(); // enter/update
 
-	    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);
+	    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
 
-	    for (i = left; i <= right; i += N1) {
-	      right2 = Math.min(i + N1 - 1, right);
-	      multiSelect$1(items, i, right2, N2, this.compareMinY);
+	    groups.exit().remove(); // enter
 
-	      for (j = i; j <= right2; j += N2) {
-	        right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+	    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
 
-	        node.children.push(this._build(items, j, right3, height - 1));
+	    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);
+
+	    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';
 	      }
 	    }
+	  }
 
-	    calcBBox$1(node, this.toBBox);
-	    return node;
-	  },
-	  _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
-	    var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
-
-	    while (true) {
-	      path.push(node);
-	      if (node.leaf || path.length - 1 === level) break;
-	      minArea = minEnlargement = Infinity;
-
-	      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
+	  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 (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;
-	          }
-	        }
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
 	      }
-
-	      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
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryImages.enabled;
+	    svgMapillaryImages.enabled = _;
 
-	    var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
+	    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;
+	  };
 
-	    node.children.push(item);
-	    extend$3(node, bbox); // split on node overflow; propagate upwards if necessary
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	    while (level >= 0) {
-	      if (insertPath[level].children.length > this._maxEntries) {
-	        this._split(insertPath, level);
+	  init();
+	  return drawImages;
+	}
 
-	        level--;
-	      } else break;
-	    } // adjust bboxes along the insertion path
+	function svgMapillaryPosition(projection, context) {
+	  var throttledRedraw = throttle(function () {
+	    update();
+	  }, 1000);
 
+	  var minZoom = 12;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	    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;
+	  var _mapillary;
 
-	    this._chooseSplitAxis(node, m, M);
+	  var viewerCompassAngle;
 
-	    var splitIndex = this._chooseSplitIndex(node, m, M);
+	  function init() {
+	    if (svgMapillaryPosition.initialized) return; // run once
 
-	    var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-	    newNode.height = node.height;
-	    newNode.leaf = node.leaf;
-	    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$1([node, newNode]);
-	    this.data.height = node.height + 1;
-	    this.data.leaf = false;
-	    calcBBox$1(this.data, this.toBBox);
-	  },
-	  _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
-	    var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
-	    minOverlap = minArea = Infinity;
+	    svgMapillaryPosition.initialized = true;
+	  }
 
-	    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
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	      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;
-	        }
-	      }
+	      _mapillary.event.on('imageChanged', throttledRedraw);
+
+	      _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 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
+	    return _mapillary;
+	  }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	    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;
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	    for (i = m; i < M - m; i++) {
-	      child = node.children[i];
-	      extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-	      margin += bboxMargin$1(leftBBox);
-	    }
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    for (i = M - m - 1; i >= m; i--) {
-	      child = node.children[i];
-	      extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-	      margin += bboxMargin$1(rightBBox);
+	    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 margin;
-	  },
-	  _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
-	    // adjust bboxes along the given tree path
-	    for (var i = level; i >= 0; i--) {
-	      extend$3(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] + '};');
+	    return t;
 	  }
-	};
 
-	function findItem$1(item, items, equalsFn) {
-	  if (!equalsFn) return items.indexOf(item);
+	  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
 
-	  for (var i = 0; i < items.length; i++) {
-	    if (equalsFn(item, items[i])) return i;
-	  }
+	    groups.exit().remove(); // enter
 
-	  return -1;
-	} // calculate node's bbox from bboxes of its children
+	    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 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 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();
+	    }
+	  }
 
-	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;
+	  drawImages.enabled = function () {
+	    update();
+	    return this;
+	  };
 
-	  for (var i = k, child; i < p; i++) {
-	    child = node.children[i];
-	    extend$3(destNode, node.leaf ? toBBox(child) : child);
-	  }
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	  return destNode;
+	  init();
+	  return drawImages;
 	}
 
-	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;
-	}
+	function svgMapillarySigns(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	function compareNodeMinX$1(a, b) {
-	  return a.minX - b.minX;
-	}
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	function compareNodeMinY$1(a, b) {
-	  return a.minY - b.minY;
-	}
+	  var _mapillary;
 
-	function bboxArea$1(a) {
-	  return (a.maxX - a.minX) * (a.maxY - a.minY);
-	}
+	  function init() {
+	    if (svgMapillarySigns.initialized) return; // run once
 
-	function bboxMargin$1(a) {
-	  return a.maxX - a.minX + (a.maxY - a.minY);
-	}
+	    svgMapillarySigns.enabled = false;
+	    svgMapillarySigns.initialized = true;
+	  }
 
-	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 getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	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);
-	}
+	      _mapillary.event.on('loadedSigns', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	function contains$1(a, b) {
-	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-	}
+	    return _mapillary;
+	  }
 
-	function intersects$1(a, b) {
-	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-	}
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadSignResources(context);
+	    editOn();
+	  }
 
-	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 hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	function multiSelect$1(arr, left, right, n, compare) {
-	  var stack = [left, right],
-	      mid;
+	  function editOff() {
+	    layer.selectAll('.icon-sign').remove();
+	    layer.style('display', 'none');
+	  }
 
-	  while (stack.length) {
-	    right = stack.pop();
-	    left = stack.pop();
-	    if (right - left <= n) continue;
-	    mid = left + Math.ceil((right - left) / n / 2) * n;
-	    quickselect$2(arr, mid, left, right, compare);
-	    stack.push(left, mid, mid, right);
+	  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);
+	          });
+	        }
+	      }
+	    });
 	  }
-	}
-	rbush_1["default"] = _default$2;
 
-	var lineclip_1$1 = lineclip$1;
-	lineclip$1.polyline = lineclip$1;
-	lineclip$1.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	  function filterData(detectedFeatures) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	function lineclip$1(points, bbox, result) {
-	  var len = points.length,
-	      codeA = bitCode$1(points[0], bbox),
-	      part = [],
-	      i,
-	      a,
-	      b,
-	      codeB,
-	      lastCode;
-	  if (!result) result = [];
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	  for (i = 1; i < len; i++) {
-	    a = points[i - 1];
-	    b = points[i];
-	    codeB = lastCode = bitCode$1(b, bbox);
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    while (true) {
-	      if (!(codeA | codeB)) {
-	        // accept
-	        part.push(a);
+	    return detectedFeatures;
+	  }
 
-	        if (codeB !== lastCode) {
-	          // segment went outside
-	          part.push(b);
+	  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
 
-	          if (i < len - 1) {
-	            // start a new line
-	            result.push(part);
-	            part = [];
-	          }
-	        } else if (i === len - 1) {
-	          part.push(b);
-	        }
+	    signs.exit().remove(); // enter
 
-	        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 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 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);
 	    }
-
-	    codeA = lastCode;
 	  }
 
-	  if (part.length) result.push(part);
-	  return result;
-	} // Sutherland-Hodgeman polygon clipping algorithm
+	  drawSigns.enabled = function (_) {
+	    if (!arguments.length) return svgMapillarySigns.enabled;
+	    svgMapillarySigns.enabled = _;
 
+	    if (svgMapillarySigns.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_signs', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_signs', null);
+	    }
 
-	function polygonclip$1(points, bbox) {
-	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	  for (edge = 1; edge <= 8; edge *= 2) {
-	    result = [];
-	    prev = points[points.length - 1];
-	    prevInside = !(bitCode$1(prev, bbox) & edge);
+	  drawSigns.supported = function () {
+	    return !!getService();
+	  };
 
-	    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
+	  init();
+	  return drawSigns;
+	}
 
-	      if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
-	      if (inside) result.push(p); // add a point if it's inside
+	function svgMapillaryMapFeatures(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	      prev = p;
-	      prevInside = inside;
-	    }
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	    points = result;
-	    if (!points.length) break;
-	  }
+	  var _mapillary;
 
-	  return result;
-	} // intersect a segment against one of the 4 lines that make up the bbox
+	  function init() {
+	    if (svgMapillaryMapFeatures.initialized) return; // run once
 
+	    svgMapillaryMapFeatures.enabled = false;
+	    svgMapillaryMapFeatures.initialized = true;
+	  }
 
-	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
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
+	      _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	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
+	    return _mapillary;
+	  }
 
-	  if (p[1] < bbox[1]) code |= 4; // bottom
-	  else if (p[1] > bbox[3]) code |= 8; // top
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadObjectResources(context);
+	    editOn();
+	  }
 
-	  return code;
-	}
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	var whichPolygon_1 = whichPolygon;
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	function whichPolygon(data) {
-	  var bboxes = [];
+	  function editOff() {
+	    layer.selectAll('.icon-map-feature').remove();
+	    layer.style('display', 'none');
+	  }
 
-	  for (var i = 0; i < data.features.length; i++) {
-	    var feature = data.features[i];
-	    var coords = feature.geometry.coordinates;
+	  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 (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));
+	        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);
+	          });
+	        }
 	      }
-	    }
+	    });
 	  }
 
-	  var tree = rbush_1().load(bboxes);
+	  function filterData(detectedFeatures) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	  function query(p, multi) {
-	    var output = [],
-	        result = tree.search({
-	      minX: p[0],
-	      minY: p[1],
-	      maxX: p[0],
-	      maxY: p[1]
-	    });
+	    if (fromDate) {
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
+	      });
+	    }
 
-	    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;
-	      }
+	    if (toDate) {
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+	      });
 	    }
 
-	    return multi && output.length ? output : null;
+	    return detectedFeatures;
 	  }
 
-	  query.tree = tree;
+	  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
 
-	  query.bbox = function queryBBox(bbox) {
-	    var output = [];
-	    var result = tree.search({
-	      minX: bbox[0],
-	      minY: bbox[1],
-	      maxX: bbox[2],
-	      maxY: bbox[3]
+	    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';
+	      }
+
+	      return '#' + d.value;
 	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-	    for (var i = 0; i < result.length; i++) {
-	      if (polygonIntersectsBBox(result[i].coords, bbox)) {
-	        output.push(result[i].props);
+	    mapFeatures.merge(enter).attr('transform', transform);
+	  }
+
+	  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.loadMapFeatures(projection);
+	        service.showFeatureDetections(true);
+	      } else {
+	        editOff();
 	      }
+	    } else if (service) {
+	      service.showFeatureDetections(false);
 	    }
+	  }
 
-	    return output;
+	  drawMapFeatures.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+	    svgMapillaryMapFeatures.enabled = _;
+
+	    if (svgMapillaryMapFeatures.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_map_features', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_map_features', null);
+	    }
+
+	    dispatch.call('change');
+	    return this;
 	  };
 
-	  return query;
+	  drawMapFeatures.supported = function () {
+	    return !!getService();
+	  };
+
+	  init();
+	  return drawMapFeatures;
 	}
 
-	function polygonIntersectsBBox(polygon, bbox) {
-	  var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
-	  if (insidePolygon(polygon, bboxCenter)) return true;
+	function svgKartaviewImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	  for (var i = 0; i < polygon.length; i++) {
-	    if (lineclip_1$1(polygon[i], bbox).length > 0) return true;
-	  }
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	  return false;
-	} // ray casting algorithm for detecting if point is in polygon
+	  var _kartaview;
 
+	  function init() {
+	    if (svgKartaviewImages.initialized) return; // run once
 
-	function insidePolygon(rings, p) {
-	  var inside = false;
+	    svgKartaviewImages.enabled = false;
+	    svgKartaviewImages.initialized = true;
+	  }
 
-	  for (var i = 0, len = rings.length; i < len; i++) {
-	    var ring = rings[i];
+	  function getService() {
+	    if (services.kartaview && !_kartaview) {
+	      _kartaview = services.kartaview;
 
-	    for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-	      if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
+	      _kartaview.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.kartaview && _kartaview) {
+	      _kartaview = null;
 	    }
-	  }
-
-	  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 _kartaview;
+	  }
 
-	function treeItem(coords, props) {
-	  var item = {
-	    minX: Infinity,
-	    minY: Infinity,
-	    maxX: -Infinity,
-	    maxY: -Infinity,
-	    coords: coords,
-	    props: props
-	  };
+	  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');
+	    });
+	  }
 
-	  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]);
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
 	  }
 
-	  return item;
-	}
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	var type = "FeatureCollection";
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+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	var borders = rawBorders;
-	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 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 loadDerivedDataAndCaches(borders) {
-	  var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-	  var geometryFeatures = [];
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
 
-	  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);
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
 	  }
 
-	  for (var _i in borders.features) {
-	    var _feature2 = borders.features[_i];
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    _feature2.properties.groups.sort(function (groupID1, groupID2) {
-	      return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
-	    });
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+	    }
 
-	    loadMembersForGroupsOf(_feature2);
+	    return t;
 	  }
 
-	  var geometryOnlyCollection = {
-	    type: 'RegionFeatureCollection',
-	    features: geometryFeatures
-	  };
-	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
-
-	  function loadGroups(feature) {
-	    var props = feature.properties;
+	  function filterImages(images) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	    if (!props.groups) {
-	      props.groups = [];
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
-	    if (props.country) {
-	      props.groups.push(props.country);
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() <= toTimestamp;
+	      });
 	    }
 
-	    if (props.m49 !== '001') {
-	      props.groups.push('001');
+	    if (usernames) {
+	      images = images.filter(function (item) {
+	        return usernames.indexOf(item.captured_by) !== -1;
+	      });
 	    }
+
+	    return images;
 	  }
 
-	  function loadM49(feature) {
-	    var props = feature.properties;
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	    if (!props.m49 && props.iso1N3) {
-	      props.m49 = props.iso1N3;
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
-	  }
 
-	  function loadIsoStatus(feature) {
-	    var props = feature.properties;
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    if (!props.isoStatus && props.iso1A2) {
-	      props.isoStatus = 'official';
+	    if (usernames) {
+	      sequences = sequences.filter(function (image) {
+	        return usernames.indexOf(image.properties.captured_by) !== -1;
+	      });
 	    }
+
+	    return sequences;
 	  }
 
-	  function loadLevel(feature) {
-	    var props = feature.properties;
-	    if (props.level) return;
+	  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 = [];
 
-	    if (!props.country) {
-	      props.level = 'country';
-	    } else if (props.isoStatus === 'official') {
-	      props.level = 'territory';
-	    } else {
-	      props.level = 'subterritory';
+	    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
+
+	    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 === 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');
 	  }
 
-	  function loadRoadSpeedUnit(feature) {
-	    var props = feature.properties;
+	  function drawImages(selection) {
+	    var enabled = svgKartaviewImages.enabled,
+	        service = getService();
+	    layer = selection.selectAll('.layer-kartaview').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-kartaview').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
 
-	    if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.roadSpeedUnit = 'km/h';
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
 	    }
 	  }
 
-	  function loadDriveSide(feature) {
-	    var props = feature.properties;
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgKartaviewImages.enabled;
+	    svgKartaviewImages.enabled = _;
 
-	    if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.driveSide = 'right';
+	    if (svgKartaviewImages.enabled) {
+	      showLayer();
+	      context.photos().on('change.kartaview_images', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.kartaview_images', null);
 	    }
+
+	    dispatch.call('change');
+	    return this;
+	  };
+
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
+
+	  init();
+	  return drawImages;
+	}
+
+	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 loadFlag(feature) {
-	    if (!feature.properties.iso1A2) return;
-	    var flag = feature.properties.iso1A2.replace(/./g, function (_char) {
-	      return String.fromCodePoint(_char.charCodeAt(0) + 127397);
+	  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');
 	    });
-	    feature.properties.emojiFlag = flag;
 	  }
 
-	  function loadMembersForGroupsOf(feature) {
-	    var featureID = feature.properties.id;
-	    var standardizedGroupIDs = [];
+	  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');
+	    });
+	  }
 
-	    for (var j in feature.properties.groups) {
-	      var groupID = feature.properties.groups[j];
-	      var groupFeature = featuresByCode[groupID];
-	      standardizedGroupIDs.push(groupFeature.properties.id);
+	  drawOsm.enabled = function (val) {
+	    if (!arguments.length) return enabled;
+	    enabled = val;
 
-	      if (groupFeature.properties.members) {
-	        groupFeature.properties.members.push(featureID);
-	      } else {
-	        groupFeature.properties.members = [featureID];
-	      }
+	    if (enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
 	    }
 
-	    feature.properties.groups = standardizedGroupIDs;
-	  }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	  function cacheFeatureByIDs(feature) {
-	    for (var k in identifierProps) {
-	      var prop = identifierProps[k];
-	      var id = prop && feature.properties[prop];
+	  return drawOsm;
+	}
 
-	      if (id) {
-	        id = id.replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[id] = feature;
-	      }
-	    }
+	var _notesEnabled = false;
 
-	    if (feature.properties.aliases) {
-	      for (var j in feature.properties.aliases) {
-	        var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[alias] = feature;
-	      }
-	    }
-	  }
-	}
+	var _osmService;
 
-	function locArray(loc) {
-	  if (Array.isArray(loc)) {
-	    return loc;
-	  } else if (loc.coordinates) {
-	    return loc.coordinates;
+	function svgNotes(projection, context, dispatch) {
+	  if (!dispatch) {
+	    dispatch = dispatch$8('change');
 	  }
 
-	  return loc.geometry.coordinates;
-	}
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	function smallestFeature(loc) {
-	  var query = locArray(loc);
-	  var featureProperties = whichPolygonGetter(query);
-	  if (!featureProperties) return null;
-	  return featuresByCode[featureProperties.id];
-	}
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var _notesVisible = false;
 
-	function countryFeature(loc) {
-	  var feature = smallestFeature(loc);
-	  if (!feature) return null;
-	  var countryCode = feature.properties.country || feature.properties.iso1A2;
-	  return featuresByCode[countryCode];
-	}
+	  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.
 
-	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 _feature3 = features[i];
+	  function getService() {
+	    if (services.osm && !_osmService) {
+	      _osmService = services.osm;
 
-	      if (_feature3.properties.level === targetLevel || levels.indexOf(_feature3.properties.level) > targetLevelIndex) {
-	        return _feature3;
-	      }
+	      _osmService.on('loadedNotes', throttledRedraw);
+	    } else if (!services.osm && _osmService) {
+	      _osmService = null;
 	    }
 
-	    return null;
-	  }
+	    return _osmService;
+	  } // Show the notes
 
-	  return countryFeature(loc);
-	}
 
-	function featureForID(id) {
-	  var stringID;
+	  function editOn() {
+	    if (!_notesVisible) {
+	      _notesVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the notes and their touch targets
 
-	  if (typeof id === 'number') {
-	    stringID = id.toString();
 
-	    if (stringID.length === 1) {
-	      stringID = '00' + stringID;
-	    } else if (stringID.length === 2) {
-	      stringID = '0' + stringID;
+	  function editOff() {
+	    if (_notesVisible) {
+	      _notesVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.note').remove();
+	      touchLayer.selectAll('.note').remove();
 	    }
-	  } else {
-	    stringID = id.replace(idFilterRegex, '').toUpperCase();
-	  }
+	  } // Enable the layer.  This shows the notes and transitions them to visible.
 
-	  return featuresByCode[stringID] || null;
-	}
 
-	function smallestOrMatchingFeature(query) {
-	  if (_typeof(query) === 'object') {
-	    return smallestFeature(query);
-	  }
+	  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.
 
-	  return featureForID(query);
-	}
 
-	function feature(query, opts) {
-	  if (_typeof(query) === 'object') {
-	    return featureForLoc(query, opts);
-	  }
+	  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
 
-	  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);
-	  }
+	  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 properties = feature.properties;
+	    var notes = drawLayer.selectAll('.note').data(data, function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	  for (var i in properties.groups) {
-	    var groupID = properties.groups[i];
-	    features.push(featuresByCode[groupID]);
-	  }
+	    notes.exit().remove(); // enter
 
-	  return features;
-	}
-	function roadSpeedUnit(query) {
-	  var feature = smallestOrMatchingFeature(query);
-	  return feature && feature.properties.roadSpeedUnit || null;
-	}
+	    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
 
-	var _dataDeprecated;
+	    notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+	      var mode = context.mode();
+	      var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
 
-	var _nsi;
+	      return !isMoving && d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	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
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.note').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	  _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
+	    targets.exit().remove(); // enter/update
 
-	    _nsi.matcher.buildMatchIndex(d.brands); // index all known wikipedia and wikidata tags
+	    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.
 
-	    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;
-	      }
+	  function drawNotes(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	      if (wp) {
-	        _nsi.wikipedia[wp] = kvnd;
-	      }
-	    });
-	    return _nsi;
-	  })["catch"](function () {
-	    /* ignore */
-	  });
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	  function oldTagIssues(entity, graph) {
-	    var oldTags = Object.assign({}, entity.tags); // shallow copy
+	    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);
 
-	    var preset = _mainPresetIndex.match(entity, graph);
-	    var subtype = 'deprecated_tags';
-	    if (!preset) return []; // upgrade preset..
+	    if (_notesEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadNotes(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	    if (preset.replacement) {
-	      var newPreset = _mainPresetIndex.item(preset.replacement);
-	      graph = actionChangePreset(entity.id, preset, newPreset, true
-	      /* skip field defaults */
-	      )(graph);
-	      entity = graph.entity(entity.id);
-	      preset = newPreset;
-	    } // upgrade tags..
 
+	  drawNotes.enabled = function (val) {
+	    if (!arguments.length) return _notesEnabled;
+	    _notesEnabled = val;
 
-	    if (_dataDeprecated) {
-	      var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
+	    if (_notesEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	      if (deprecatedTags.length) {
-	        deprecatedTags.forEach(function (tag) {
-	          graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
-	        });
-	        entity = graph.entity(entity.id);
+	      if (context.selectedNoteID()) {
+	        context.enter(modeBrowse(context));
 	      }
-	    } // 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]) {
-	          if (preset.addTags[k] === '*') {
-	            newTags[k] = 'yes';
-	          } else {
-	            newTags[k] = preset.addTags[k];
-	          }
-	        }
-	      });
 	    }
 
-	    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];
-	      }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	      if (!isBrand && newTags.wikipedia) {
-	        // fallback to `wikipedia`
-	        isBrand = _nsi.wikipedia[newTags.wikipedia];
-	      }
+	  return drawNotes;
+	}
 
-	      if (isBrand && !newTags.office) {
-	        // but avoid doing this for corporate offices
-	        if (newTags.wikidata) {
-	          newTags['brand:wikidata'] = newTags.wikidata;
-	          delete newTags.wikidata;
-	        }
+	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;
+	    });
+	  }
 
-	        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.
+	  return drawTouch;
+	}
 
-	      } // try key/value|name match against name-suggestion-index
+	function refresh(selection, node) {
+	  var cr = node.getBoundingClientRect();
+	  var prop = [cr.width, cr.height];
+	  selection.property('__dimensions__', prop);
+	  return prop;
+	}
 
+	function utilGetDimensions(selection, force) {
+	  if (!selection || selection.empty()) {
+	    return [0, 0];
+	  }
 
-	      if (newTags.name) {
-	        for (var i = 0; i < nsiKeys.length; i++) {
-	          var k = nsiKeys[i];
-	          if (!newTags[k]) continue;
-	          var center = entity.extent(graph).center();
-	          var countryCode = iso1A2Code(center);
+	  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 match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
+	  var node = selection.node();
 
-	          if (!match) continue; // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
+	  if (dimensions === null) {
+	    refresh(selection, node);
+	    return selection;
+	  }
 
-	          if (match.d) continue;
-	          var brand = _nsi.brands[match.kvnd];
+	  return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+	}
 
-	          if (brand && brand.tags['brand:wikidata'] && brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
-	            subtype = 'noncanonical_brand';
-	            var keepTags = ['takeaway'].reduce(function (acc, k) {
-	              if (newTags[k]) {
-	                acc[k] = newTags[k];
-	              }
+	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: 'kartaview',
+	    layer: svgKartaviewImages(projection, context, dispatch)
+	  }, {
+	    id: 'debug',
+	    layer: svgDebug(projection, context)
+	  }, {
+	    id: 'geolocate',
+	    layer: svgGeolocate(projection)
+	  }, {
+	    id: 'touch',
+	    layer: svgTouch()
+	  }];
 
-	              return acc;
-	            }, {});
-	            nsiKeys.forEach(function (k) {
-	              return delete newTags[k];
-	            });
-	            Object.assign(newTags, brand.tags, keepTags);
-	            break;
-	          }
-	        }
-	      }
-	    } // determine diff
+	  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);
+	    });
+	  }
 
+	  drawLayers.all = function () {
+	    return _layers;
+	  };
 
-	    var tagDiff = utilTagDiff(oldTags, newTags);
-	    if (!tagDiff.length) return [];
-	    var isOnlyAddingTags = tagDiff.every(function (d) {
-	      return d.type === '+';
+	  drawLayers.layer = function (id) {
+	    var obj = _layers.find(function (o) {
+	      return o.id === id;
 	    });
-	    var prefix = '';
 
-	    if (subtype === 'noncanonical_brand') {
-	      prefix = 'noncanonical_brand.';
-	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
-	      subtype = 'incomplete_tags';
-	      prefix = 'incomplete.';
-	    } // don't allow autofixing brand tags
+	    return obj && obj.layer;
+	  };
 
+	  drawLayers.only = function (what) {
+	    var arr = [].concat(what);
 
-	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
-	    return [new validationIssue({
-	      type: type,
-	      subtype: subtype,
-	      severity: 'warning',
-	      message: showMessage,
-	      reference: showReference,
-	      entityIds: [entity.id],
-	      hash: JSON.stringify(tagDiff),
-	      dynamicFixes: function dynamicFixes() {
-	        return [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 all = _layers.map(function (layer) {
+	      return layer.id;
+	    });
 
-	    function doUpgrade(graph) {
-	      var currEntity = graph.hasEntity(entity.id);
-	      if (!currEntity) return graph;
-	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
+	    return drawLayers.remove(utilArrayDifference(all, arr));
+	  };
 
-	      tagDiff.forEach(function (diff) {
-	        if (diff.type === '-') {
-	          delete newTags[diff.key];
-	        } else if (diff.type === '+') {
-	          newTags[diff.key] = diff.newVal;
-	        }
+	  drawLayers.remove = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (id) {
+	      _layers = _layers.filter(function (o) {
+	        return o.id !== id;
 	      });
-	      return actionChangeTags(currEntity.id, newTags)(graph);
-	    }
-
-	    function showMessage(context) {
-	      var currEntity = context.hasEntity(entity.id);
-	      if (!currEntity) return '';
-	      var messageID = "issues.outdated_tags.".concat(prefix, "message");
+	    });
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
-	        messageID += '_incomplete';
+	  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;
+	  };
 
-	      return _t.html(messageID, {
-	        feature: utilDisplayLabel(currEntity, context.graph())
-	      });
-	    }
+	  drawLayers.dimensions = function (val) {
+	    if (!arguments.length) return utilGetDimensions(svg);
+	    utilSetDimensions(svg, val);
+	    return this;
+	  };
 
-	    function showReference(selection) {
-	      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;
-	      });
-	    }
-	  }
+	  return utilRebind(drawLayers, dispatch, 'on');
+	}
 
-	  function oldMultipolygonIssues(entity, graph) {
-	    var multipolygon, outerWay;
+	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
+	  };
 
-	    if (entity.type === 'relation') {
-	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-	      multipolygon = entity;
-	    } else if (entity.type === 'way') {
-	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-	      outerWay = entity;
-	    } else {
-	      return [];
-	    }
+	  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
 
-	    if (!multipolygon || !outerWay) return [];
-	    return [new validationIssue({
-	      type: type,
-	      subtype: 'old_multipolygon',
-	      severity: 'warning',
-	      message: showMessage,
-	      reference: showReference,
-	      entityIds: [outerWay.id, multipolygon.id],
-	      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'));
-	          }
-	        })];
-	      }
-	    })];
+	    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
 
-	    function doUpgrade(graph) {
-	      var currMultipolygon = graph.hasEntity(multipolygon.id);
-	      var currOuterWay = graph.hasEntity(outerWay.id);
-	      if (!currMultipolygon || !currOuterWay) return graph;
-	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
-	      graph = graph.replace(currMultipolygon);
-	      return actionChangeTags(currOuterWay.id, {})(graph);
-	    }
+	    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
 
-	    function showMessage(context) {
-	      var currMultipolygon = context.hasEntity(multipolygon.id);
-	      if (!currMultipolygon) return '';
-	      return _t.html('issues.old_multipolygon.message', {
-	        multipolygon: utilDisplayLabel(currMultipolygon, context.graph())
-	      });
-	    }
+	    targets.exit().remove();
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
-	    }
-	  }
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-	  var validation = function checkOutdatedTags(entity, graph) {
-	    var issues = oldMultipolygonIssues(entity, graph);
-	    if (!issues.length) issues = oldTagIssues(entity, graph);
-	    return issues;
-	  };
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	  validation.type = type;
-	  return validation;
-	}
+	      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
 
-	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
+	    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 publicKeys = {
-	    amenity: true,
-	    craft: true,
-	    historic: true,
-	    leisure: true,
-	    office: true,
-	    shop: true,
-	    tourism: true
-	  }; // these tags may contain personally identifying info
+	    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
 
-	  var personalTags = {
-	    'contact:email': true,
-	    'contact:fax': true,
-	    'contact:phone': true,
-	    email: true,
-	    fax: true,
-	    phone: true
-	  };
+	    nopes.exit().remove(); // enter/update
 
-	  var validation = function checkPrivateData(entity) {
-	    var tags = entity.tags;
-	    if (!tags.building || !privateBuildingValues[tags.building]) return [];
-	    var keepTags = {};
+	    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);
+	  }
 
-	    for (var k in tags) {
-	      if (publicKeys[k]) return []; // probably a public feature
+	  function drawLines(selection, graph, entities, filter) {
+	    var base = context.history().base();
 
-	      if (!personalTags[k]) {
-	        keepTags[k] = tags[k];
+	    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];
 	      }
-	    }
 
-	    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'));
-	          }
-	        })];
+	      if (b.tags.highway) {
+	        scoreB -= highway_stack[b.tags.highway];
 	      }
-	    })];
 
-	    function doUpgrade(graph) {
-	      var currEntity = graph.hasEntity(entity.id);
-	      if (!currEntity) return graph;
-	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
+	      return scoreA - scoreB;
+	    }
 
-	      tagDiff.forEach(function (diff) {
-	        if (diff.type === '-') {
-	          delete newTags[diff.key];
-	        } else if (diff.type === '+') {
-	          newTags[diff.key] = diff.newVal;
+	    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';
+	          }
 	        }
-	      });
-	      return actionChangeTags(currEntity.id, newTags)(graph);
+
+	        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 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())
-	      });
+	    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 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;
+	    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;
 	      });
+
+	      if (detected.ie) {
+	        markers.each(function () {
+	          this.parentNode.insertBefore(this, this);
+	        });
+	      }
 	    }
-	  };
 
-	  validation.type = type;
-	  return validation;
-	}
+	    var getPath = svgPath(projection, graph);
+	    var ways = [];
+	    var onewaydata = {};
+	    var sideddata = {};
+	    var oldMultiPolygonOuters = {};
 
-	var _discardNameRegexes = [];
-	function validationSuspiciousName() {
-	  var type = 'suspicious_name';
-	  var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway']; // 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.
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var outer = osmOldMultipolygonOuterMember(entity, graph);
 
-	  _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 (outer) {
+	        ways.push(entity.mergeTags(outer.tags));
+	        oldMultiPolygonOuters[outer.id] = true;
+	      } else if (entity.geometry(graph) === 'line') {
+	        ways.push(entity);
+	      }
+	    }
 
-	  function isDiscardedSuggestionName(lowercaseName) {
-	    return _discardNameRegexes.some(function (regex) {
-	      return regex.test(lowercaseName);
+	    ways = ways.filter(getPath);
+	    var pathdata = utilArrayGroupBy(ways, function (way) {
+	      return way.layer();
 	    });
-	  } // test if the name is just the key or tag value (e.g. "park")
-
+	    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
 
-	  function nameMatchesRawTag(lowercaseName, tags) {
-	    for (var i = 0; i < keysToTestForGenericValues.length; i++) {
-	      var key = keysToTestForGenericValues[i];
-	      var val = tags[key];
+	    var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-	      if (val) {
-	        val = val.toLowerCase();
+	    var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-	        if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
-	          return true;
-	        }
-	      }
-	    }
+	    [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..
 
-	    return false;
+	    touchLayer.call(drawTargets, graph, ways, filter);
 	  }
 
-	  function isGenericName(name, tags) {
-	    name = name.toLowerCase();
-	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
-	  }
+	  return drawLines;
+	}
 
-	  function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
-	    return new validationIssue({
-	      type: type,
-	      subtype: 'generic_name',
-	      severity: 'warning',
-	      message: function message(context) {
-	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) return '';
-	        var preset = _mainPresetIndex.match(entity, context.graph());
-	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        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 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
+	function svgMidpoints(projection, context) {
+	  var targetRadius = 8;
 
-	            delete tags[nameKey];
-	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
-	          }
-	        })];
-	      }
+	  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
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
-	    }
-	  }
+	    targets.exit().remove(); // enter/update
 
-	  function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
-	    return new validationIssue({
-	      type: type,
-	      subtype: 'not_name',
-	      severity: 'warning',
-	      message: function message(context) {
-	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) return '';
-	        var preset = _mainPresetIndex.match(entity, context.graph());
-	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        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 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
+	    targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+	      return 'node midpoint target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
 
-	            delete tags[nameKey];
-	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
-	          }
-	        })];
-	      }
-	    });
+	  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();
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
+	    if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+	      drawLayer.selectAll('.midpoint').remove();
+	      touchLayer.selectAll('.midpoint.target').remove();
+	      return;
 	    }
-	  }
 
-	  var validation = function checkGenericName(entity) {
-	    // a generic name is okay if it's a known brand or entity
-	    if (entity.hasWikidata()) return [];
-	    var issues = [];
-	    var notNames = (entity.tags['not:name'] || '').split(';');
+	    var poly = extent.polygon();
+	    var midpoints = {};
 
-	    for (var key in entity.tags) {
-	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
-	      if (!m) continue;
-	      var langCode = m.length >= 2 ? m[1] : null;
-	      var value = entity.tags[key];
+	    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);
 
-	      if (notNames.length) {
-	        for (var i in notNames) {
-	          var notName = notNames[i];
+	      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('-');
 
-	          if (notName && value === notName) {
-	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
-	            continue;
+	        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;
+
+	          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;
+	              }
+	            }
+	          }
+
+	          if (loc) {
+	            midpoints[id] = {
+	              type: 'midpoint',
+	              id: id,
+	              loc: loc,
+	              edge: [a.id, b.id],
+	              parents: [entity]
+	            };
 	          }
 	        }
 	      }
+	    }
 
-	      if (isGenericName(value, entity.tags)) {
-	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+	    function midpointFilter(d) {
+	      if (midpoints[d.id]) return true;
+
+	      for (var i = 0; i < d.parents.length; i++) {
+	        if (filter(d.parents[i])) {
+	          return true;
+	        }
 	      }
+
+	      return false;
 	    }
 
-	    return issues;
-	  };
+	    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.
 
-	  validation.type = type;
-	  return validation;
-	}
+	    groups.select('polygon.shadow');
+	    groups.select('polygon.fill'); // Draw touch targets..
 
-	function validationUnsquareWay(context) {
-	  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
+	    touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	  }
 
-	  var epsilon = 0.05;
-	  var nodeThreshold = 10;
+	  return drawMidpoints;
+	}
 
-	  function isBuilding(entity, graph) {
-	    if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
-	    return entity.tags.building && entity.tags.building !== 'no';
+	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');
 	  }
 
-	  var validation = function checkUnsquareWay(entity, graph) {
-	    if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
-
-	    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
+	  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.
 
-	    var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-	    if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
-	    // ignore if not all nodes are fully downloaded
+	  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);
+	  }
 
-	    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
+	  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
 
-	    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';
-	        });
+	      data.push({
+	        type: 'Feature',
+	        id: node.id,
+	        properties: {
+	          target: true,
+	          entity: node
+	        },
+	        geometry: node.asGeoJSON()
 	      });
 	    });
-	    if (hasConnectedSquarableWays) return []; // user-configurable square threshold
+	    var targets = selection.selectAll('.point.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	    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
+	    targets.exit().remove(); // enter/update
 
-	    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
+	    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..
 
-	      autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
-	        n: 1
-	      })];
-	    }
+	    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
 
-	    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: JSON.stringify(autoArgs !== undefined) + 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
+	    groups.select('.stroke'); // propagate bound data
 
-	            context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
-	              n: 1
-	            })); // run after the squaring transition (currently 150ms)
+	    groups.select('.icon') // propagate bound data
+	    .attr('xlink:href', function (entity) {
+	      var preset = _mainPresetIndex.match(entity, graph);
+	      var picon = preset && preset.icon;
 
-	            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')
-	                );
-	            }
-	        })
-	        */
-	        ];
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-11' : '');
 	      }
-	    })];
+	    }); // Draw touch targets..
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
-	    }
-	  };
+	    touchLayer.call(drawTargets, graph, points, filter);
+	  }
 
-	  validation.type = type;
-	  return validation;
+	  return drawPoints;
 	}
 
-	var Validations = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		validationAlmostJunction: validationAlmostJunction,
-		validationCloseNodes: validationCloseNodes,
-		validationCrossingWays: validationCrossingWays,
-		validationDisconnectedWay: validationDisconnectedWay,
-		validationFormatting: validationFormatting,
-		validationHelpRequest: validationHelpRequest,
-		validationImpossibleOneway: validationImpossibleOneway,
-		validationIncompatibleSource: validationIncompatibleSource,
-		validationMaprules: validationMaprules,
-		validationMismatchedGeometry: validationMismatchedGeometry,
-		validationMissingRole: validationMissingRole,
-		validationMissingTag: validationMissingTag,
-		validationOutdatedTags: validationOutdatedTags,
-		validationPrivateData: validationPrivateData,
-		validationSuspiciousName: validationSuspiciousName,
-		validationUnsquareWay: validationUnsquareWay
-	});
-
-	function coreValidator(context) {
-	  var dispatch$1 = dispatch('validated', 'focusedIssue');
-	  var validator = utilRebind({}, dispatch$1, 'on');
-	  var _rules = {};
-	  var _disabledRules = {};
-	  var _ignoredIssueIDs = {}; // issue.id -> true
-
-	  var _baseCache = validationCache(); // issues before any user edits
+	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 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
 
-	  var _headCache = validationCache(); // issues after all user edits
+	      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 + ')';
+	    }
 
-	  var _validatedGraph = null;
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+	    var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
-	  var _deferred = new Set(); //
-	  // initialize the validator rulesets
-	  //
+	    var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
+	    groups.exit().remove(); // enter
 
-	  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 groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
 	    });
-	    var disabledRules = corePreferences('validate-disabledRules');
+	    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
 
-	    if (disabledRules) {
-	      disabledRules.split(',').forEach(function (key) {
-	        _disabledRules[key] = true;
-	      });
-	    }
-	  };
+	    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
 
-	  function reset(resetIgnored) {
-	    Array.from(_deferred).forEach(function (handle) {
-	      window.cancelIdleCallback(handle);
+	    groups.select('circle'); // propagate bound data
+	    // Draw touch targets..
 
-	      _deferred["delete"](handle);
-	    }); // clear caches
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	    if (resetIgnored) _ignoredIssueIDs = {};
-	    _baseCache = validationCache();
-	    _headCache = validationCache();
-	    _validatedGraph = null;
-	  } //
-	  // clear caches, called whenever iD resets after a save
-	  //
+	    groups.exit().remove(); // enter
 
+	    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
 
-	  validator.reset = function () {
-	    reset(true);
-	  };
+	    groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+	    groups.select('rect'); // propagate bound data
 
-	  validator.resetIgnoredIssues = function () {
-	    _ignoredIssueIDs = {}; // reload UI
+	    groups.select('circle'); // propagate bound data
 
-	    dispatch$1.call('validated');
-	  }; // must update issues when the user changes the unsquare thereshold
+	    return this;
+	  }
 
+	  return drawTurns;
+	}
 
-	  validator.reloadUnsquareIssues = function () {
-	    reloadUnsquareIssues(_headCache, context.graph());
-	    reloadUnsquareIssues(_baseCache, context.history().base());
-	    dispatch$1.call('validated');
+	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]
 	  };
 
-	  function reloadUnsquareIssues(cache, graph) {
-	    var checkUnsquareWay = _rules.unsquare_way;
-	    if (typeof checkUnsquareWay !== 'function') return; // uncache existing
+	  var _currHoverTarget;
 
-	    cache.uncacheIssuesOfType('unsquare_way');
-	    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
+	  var _currPersistent = {};
+	  var _currHover = {};
+	  var _prevHover = {};
+	  var _currSelected = {};
+	  var _prevSelected = {};
+	  var _radii = {};
 
-	    buildings.forEach(function (entity) {
-	      var detected = checkUnsquareWay(entity, graph);
-	      if (detected.length !== 1) return;
-	      var issue = detected[0];
+	  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.
 
-	      if (!cache.issuesByEntityID[entity.id]) {
-	        cache.issuesByEntityID[entity.id] = new Set();
-	      }
 
-	      cache.issuesByEntityID[entity.id].add(issue.id);
-	      cache.issuesByIssueID[issue.id] = issue;
-	    });
-	  } // options = {
-	  //     what: 'all',     // 'all' or 'edited'
-	  //     where: 'all',   // 'all' or 'visible'
-	  //     includeIgnored: false   // true, false, or 'only'
-	  //     includeDisabledRules: false   // true, false, or 'only'
-	  // };
+	  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();
 
-	  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..
+	    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)
 
-	      var entityIds = issue.entityIds || [];
 
-	      for (var i = 0; i < entityIds.length; i++) {
-	        var entityId = entityIds[i];
+	    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;
+	    }
 
-	        if (!context.hasEntity(entityId)) {
-	          delete _headCache.issuesByEntityID[entityId];
-	          delete _headCache.issuesByIssueID[issue.id];
-	          return false;
-	        }
-	      }
+	    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 (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) return false;
+	          if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+	            r += 1.5;
+	          }
 
-	      if (opts.where === 'visible') {
-	        var extent = issue.extent(context.graph());
-	        if (!view.intersects(extent)) return false;
-	      }
+	          if (klass === 'shadow') {
+	            // remember this value, so we don't need to
+	            _radii[entity.id] = r; // recompute it when we draw the touch targets
+	          }
 
-	      return true;
-	    });
-	  };
+	          select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+	        });
+	      });
+	    }
 
-	  validator.getResolvedIssues = function () {
-	    var baseIssues = Object.values(_baseCache.issuesByIssueID);
-	    return baseIssues.filter(function (issue) {
-	      return !_headCache.issuesByIssueID[issue.id];
-	    });
-	  };
+	    vertices.sort(sortY);
+	    var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-	  validator.focusIssue = function (issue) {
-	    var extent = issue.extent(context.graph());
+	    groups.exit().remove(); // enter
 
-	    if (extent) {
-	      var setZoom = Math.max(context.map().zoom(), 19);
-	      context.map().unobscuredCenterZoomEase(extent.center(), setZoom); // select the first entity
+	    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.
 
-	      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
-	      }
-	    }
-	  };
+	    enter.filter(function (d) {
+	      return d.hasInterestingTags();
+	    }).append('circle').attr('class', 'fill'); // update
 
-	  validator.getIssuesBySeverity = function (options) {
-	    var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-	    groups.error = groups.error || [];
-	    groups.warning = groups.warning || [];
-	    return groups;
-	  }; // show some issue types in a particular order
+	    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
 
-	  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']; // returns the issues that the given entity IDs have in common, matching the given options
+	    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
 
-	  validator.getSharedEntityIssues = function (entityIDs, options) {
-	    var cache = _headCache; // gather the issues that are common to all the entities
+	    var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+	      return zoom >= 18 && getDirections(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
-	    var issueIDs = entityIDs.reduce(function (acc, entityID) {
-	      var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
+	    dgroups.exit().remove(); // enter/update
 
-	      if (!acc) {
-	        return new Set(entityIssueIDs);
-	      }
+	    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
 
-	      return new Set(_toConsumableArray(acc).filter(function (elem) {
-	        return entityIssueIDs.has(elem);
-	      }));
-	    }, null) || [];
-	    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;
-	      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;
-	      }
+	    viewfields.exit().remove(); // enter/update
 
-	      var index1 = orderedIssueTypes.indexOf(issue1.type);
-	      var index2 = orderedIssueTypes.indexOf(issue2.type);
+	    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 + ')';
+	    });
+	  }
 
-	      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;
+	  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 {
-	        // order explicit types before everything else
-	        return index1 !== -1 ? -1 : 1;
+	        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
 
-	  validator.getEntityIssues = function (entityID, options) {
-	    return validator.getSharedEntityIssues([entityID], options);
-	  };
+	    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
 
-	  validator.getRuleKeys = function () {
-	    return Object.keys(_rules);
-	  };
+	    targets.exit().remove(); // enter/update
 
-	  validator.isRuleEnabled = function (key) {
-	    return !_disabledRules[key];
-	  };
+	    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
 
-	  validator.toggleRule = function (key) {
-	    if (_disabledRules[key]) {
-	      delete _disabledRules[key];
-	    } else {
-	      _disabledRules[key] = true;
-	    }
+	    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
 
-	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	    validator.validate();
-	  };
+	    nopes.exit().remove(); // enter/update
 
-	  validator.disableRules = function (keys) {
-	    _disabledRules = {};
-	    keys.forEach(function (k) {
-	      _disabledRules[k] = true;
-	    });
-	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	    validator.validate();
-	  };
+	    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
 
-	  validator.ignoreIssue = function (id) {
-	    _ignoredIssueIDs[id] = true;
-	  }; //
-	  // Run validation on a single entity for the given graph
-	  //
 
+	  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 validateEntity(entity, graph) {
-	    var entityIssues = []; // runs validation and appends resulting issues
+	  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 runValidation(key) {
-	      var fn = _rules[key];
+	  function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+	    var results = {};
+	    var seenIds = {};
 
-	      if (typeof fn !== 'function') {
-	        console.error('no such validation rule = ' + key); // eslint-disable-line no-console
+	    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);
 
-	        return;
-	      }
+	      if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+	        var i;
 
-	      var detected = fn(entity, graph);
-	      entityIssues = entityIssues.concat(detected);
-	    } // run all rules
+	        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);
 
-	    Object.keys(_rules).forEach(runValidation);
-	    return entityIssues;
-	  }
+	            if (member) {
+	              addChildVertices(member);
+	            }
+	          }
+	        } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
+	        }
+	      }
+	    }
 
-	  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);
-	      var entity = graph.hasEntity(entityID);
-	      if (!entity) return acc;
-	      acc.add(entityID);
-	      var checkParentRels = [entity];
+	    ids.forEach(function (id) {
+	      var entity = graph.hasEntity(id);
+	      if (!entity) return;
 
 	      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
-	          });
-	        });
-	      }
-
-	      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);
+	        if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
+	          graph.parentWays(entity).forEach(function (entity) {
+	            addChildVertices(entity);
 	          });
 	        }
-	      });
-	      return acc;
-	    }, new Set());
-	  } //
-	  // Run validation for several entities, supplied `entityIDs`,
-	  // against `graph` for the given `cache`
-	  //
+	      } 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');
 
-	  function validateEntities(entityIDs, graph, cache) {
-	    // clear caches for existing issues related to these entities
-	    entityIDs.forEach(cache.uncacheEntityID); // detect new issues and update caches
+	    if (fullRedraw) {
+	      _currPersistent = {};
+	      _radii = {};
+	    } // Collect important vertices from the `entities` list..
+	    // (during a partial redraw, it will not contain everything)
 
-	    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);
-	    });
-	  } //
-	  // 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.
-	  //
+	    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..
 
-	  validator.validate = function () {
-	    var currGraph = context.graph();
-	    _validatedGraph = _validatedGraph || context.history().base();
 
-	    if (currGraph === _validatedGraph) {
-	      dispatch$1.call('validated');
-	      return;
-	    }
+	      if (!keep && !fullRedraw) {
+	        delete _currPersistent[entity.id];
+	      }
+	    } // 3 sets of vertices to consider:
 
-	    var oldGraph = _validatedGraph;
-	    var difference = coreDifference(oldGraph, currGraph);
-	    _validatedGraph = currGraph;
-	    var createdAndModifiedEntityIDs = difference.extantIDs(true); // created/modified (true = w/relation members)
 
-	    var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph); // 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 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 modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified()).map(function (entity) {
-	      return entity.id;
-	    });
-	    var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph); // concat the sets
+	    };
+	    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.
 
-	    entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
-	    validateEntities(entityIDsToCheck, context.graph(), _headCache);
-	    dispatch$1.call('validated');
-	  };
+	    var filterRendered = function filterRendered(d) {
+	      return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+	    };
 
-	  context.history().on('reset.validator', function () {
-	    // cached issues aren't valid any longer if the history has been reset
-	    reset(false);
-	    validator.validate();
-	  }); // WHEN TO RUN VALIDATION:
-	  // When graph changes:
+	    drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+	    // When drawing, render all targets (not just those affected by a partial redraw)
 
-	  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)
-	  // When user changes editing modes:
+	    var filterTouch = function filterTouch(d) {
+	      return isMoving ? true : filterRendered(d);
+	    };
 
-	  context.on('exit.validator', validator.validate); // When merging fetched data:
+	    touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-	  context.history().on('merge.validator', function (entities) {
-	    if (!entities) return;
-	    var handle = window.requestIdleCallback(function () {
-	      var entityIDs = entities.map(function (entity) {
-	        return entity.id;
+	    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);
 	      });
-	      var headGraph = context.graph();
-	      validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
-	      var baseGraph = context.history().base();
-	      validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
-	      dispatch$1.call('validated');
-	    });
+	    }
+	  } // partial redraw - only update the selected items..
 
-	    _deferred.add(handle);
-	  });
-	  return validator;
-	}
 
-	function validationCache() {
-	  var cache = {
-	    issuesByIssueID: {},
-	    // issue.id -> issue
-	    issuesByEntityID: {} // entity.id -> set(issue.id)
+	  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;
 
-	  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();
+	        if (entity.type === 'node') {
+	          if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	            _currSelected[entity.id] = entity;
+	          }
 	        }
-
-	        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];
-	  };
+	    } else {
+	      _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+	    } // note that drawVertices will add `_currSelected` automatically if needed..
 
-	  cache.uncacheIssues = function (issues) {
-	    issues.forEach(cache.uncacheIssue);
-	  };
 
-	  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 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..
 
-	  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];
-	      }
-	    });
-	    delete cache.issuesByEntityID[entityID];
-	  };
+	  drawVertices.drawHover = function (selection, graph, target, extent) {
+	    if (target === _currHoverTarget) return; // continue only if something changed
 
-	  return cache;
-	}
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevHover = _currHover || {};
+	    _currHoverTarget = target;
+	    var entity = target && target.properties && target.properties.entity;
 
-	function coreUploader(context) {
-	  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
-	  '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 = [];
+	    if (entity) {
+	      _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+	    } else {
+	      _currHover = {};
+	    } // note that drawVertices will add `_currHover` automatically if needed..
 
-	  var _origChanges;
 
-	  var _discardTags = {};
-	  _mainFileFetcher.get('discarded').then(function (d) {
-	    _discardTags = d;
-	  })["catch"](function () {
-	    /* ignore */
-	  });
-	  var uploader = utilRebind({}, dispatch$1, 'on');
+	    var filter = function filter(d) {
+	      return d.id in _prevHover;
+	    };
 
-	  uploader.isSaving = function () {
-	    return _isSaving;
+	    drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
 	  };
 
-	  uploader.save = function (changeset, tryAgain, checkConflicts) {
-	    // Guard against accidentally entering save code twice - #4641
-	    if (_isSaving && !tryAgain) {
-	      return;
-	    }
-
-	    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.
+	  return drawVertices;
+	}
 
-	    if (!osm.authenticated()) {
-	      osm.authenticate(function (err) {
-	        if (!err) {
-	          uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
-	        }
-	      });
-	      return;
-	    }
+	function utilBindOnce(target, type, listener, capture) {
+	  var typeOnce = type + '.once';
 
-	    if (!_isSaving) {
-	      _isSaving = true;
-	      dispatch$1.call('saveStarted', this);
-	    }
+	  function one() {
+	    target.on(typeOnce, null);
+	    listener.apply(this, arguments);
+	  }
 
-	    var history = context.history();
-	    _conflicts = [];
-	    _errors = []; // Store original changes, in case user wants to download them as an .osc file
+	  target.on(typeOnce, one, capture);
+	  return this;
+	}
 
-	    _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
+	function defaultFilter(d3_event) {
+	  return !d3_event.ctrlKey && !d3_event.button;
+	}
 
-	    if (!tryAgain) {
-	      history.perform(actionNoop());
-	    } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
+	function defaultExtent() {
+	  var e = this;
 
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	    if (!checkConflicts) {
-	      upload(changeset); // Do the full (slow) conflict check..
-	    } else {
-	      performFullConflictCheck(changeset);
+	    if (e.hasAttribute('viewBox')) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
 	    }
-	  };
 
-	  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 = [];
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
-	    for (var i = 0; i < summary.length; i++) {
-	      var item = summary[i];
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	      if (item.changeType === 'modified') {
-	        _toCheck.push(item.entity.id);
-	      }
-	    }
+	function defaultWheelDelta(d3_event) {
+	  return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+	}
 
-	    var _toLoad = withChildNodes(_toCheck, localGraph);
+	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));
+	}
 
-	    var _loaded = {};
-	    var _toLoadCount = 0;
-	    var _toLoadTotal = _toLoad.length;
+	function utilZoomPan() {
+	  var filter = defaultFilter,
+	      extent = defaultExtent,
+	      constrain = defaultConstrain,
+	      wheelDelta = defaultWheelDelta,
+	      scaleExtent = [0, Infinity],
+	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+	      interpolate = interpolateZoom,
+	      dispatch = dispatch$8('start', 'zoom', 'end'),
+	      _wheelDelay = 150,
+	      _transform = identity$2,
+	      _activeGesture;
 
-	    if (_toCheck.length) {
-	      dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+	  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);
+	  }
 
-	      _toLoad.forEach(function (id) {
-	        _loaded[id] = false;
-	      });
+	  zoom.transform = function (collection, transform, point) {
+	    var selection = collection.selection ? collection.selection() : collection;
 
-	      osm.loadMultiple(_toLoad, loaded);
+	    if (collection !== selection) {
+	      schedule(collection, transform, point);
 	    } else {
-	      upload(changeset);
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
+	      });
 	    }
+	  };
 
-	    return;
+	  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);
+	  };
 
-	    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..
+	  zoom.scaleTo = function (selection, k, p) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t0 = _transform,
+	          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);
+	    });
+	  };
 
-	    function loaded(err, result) {
-	      if (_errors.length) return;
+	  zoom.translateTo = function (selection, x, y, p) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t = _transform,
+	          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);
+	  };
 
-	      if (err) {
-	        _errors.push({
-	          msg: err.message || err.responseText,
-	          details: [_t('save.status_code', {
-	            code: err.status
-	          })]
-	        });
+	  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);
+	  }
 
-	        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..
+	  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);
+	  }
 
-	          var i, id;
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	          if (entity.type === 'way') {
-	            for (i = 0; i < entity.nodes.length; i++) {
-	              id = entity.nodes[i];
+	  function schedule(transition, transform, point) {
+	    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);
+	        }
 
-	              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;
+	        g.zoom(null, null, t);
+	      };
+	    });
+	  }
 
-	              if (_loaded[id] === undefined) {
-	                _loaded[id] = false;
-	                loadMore.push(id);
-	              }
-	            }
-	          }
-	        });
-	        _toLoadCount += result.data.length;
-	        _toLoadTotal += loadMore.length;
-	        dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+	  function gesture(that, args, clean) {
+	    return !clean && _activeGesture || new Gesture(that, args);
+	  }
 
-	        if (loadMore.length) {
-	          _toLoad.push.apply(_toLoad, loadMore);
+	  function Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.extent = extent.apply(that, args);
+	  }
 
-	          osm.loadMultiple(loadMore, loaded);
-	        }
+	  Gesture.prototype = {
+	    start: function start(d3_event) {
+	      if (++this.active === 1) {
+	        _activeGesture = this;
+	        dispatch.call('start', this, d3_event);
+	      }
 
-	        if (!_toLoad.length) {
-	          detectConflicts();
-	          upload(changeset);
-	        }
+	      return this;
+	    },
+	    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;
+	      dispatch.call('zoom', this, d3_event, key, transform);
+	      return this;
+	    },
+	    end: function end(d3_event) {
+	      if (--this.active === 0) {
+	        _activeGesture = null;
+	        dispatch.call('end', this, d3_event);
 	      }
+
+	      return this;
 	    }
+	  };
 
-	    function detectConflicts() {
-	      function choice(id, text, _action) {
-	        return {
-	          id: id,
-	          text: text,
-	          action: function action() {
-	            history.replace(_action);
-	          }
-	        };
-	      }
+	  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)(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.
 
-	      function formatUser(d) {
-	        return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
+	    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);
 	      }
 
-	      function entityName(entity) {
-	        return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
-	      }
+	      clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
+	    } else {
+	      g.mouse = [p, t.invert(p)];
+	      interrupt(this);
+	      g.start(d3_event);
+	    }
+
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
+	    g.wheel = setTimeout(wheelidled, _wheelDelay);
+	    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(d3_event);
+	    }
+	  }
 
-	      function sameVersions(local, remote) {
-	        if (local.version !== remote.version) return false;
+	  var _downPointerIDs = new Set();
 
-	        if (local.type === 'way') {
-	          var children = utilArrayUnion(local.nodes, remote.nodes);
+	  var _pointerLocGetter;
 
-	          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;
-	          }
-	        }
+	  function pointerdown(d3_event) {
+	    _downPointerIDs.add(d3_event.pointerId);
 
-	        return true;
-	      }
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
+	    var started;
+	    d3_event.stopImmediatePropagation();
+	    _pointerLocGetter = utilFastMouse(this);
 
-	      _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 loc = _pointerLocGetter(d3_event);
 
-	        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'));
+	    var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-	        _conflicts.push({
-	          id: id,
-	          name: entityName(local),
-	          details: mergeConflicts,
-	          chosen: 1,
-	          choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
-	        });
-	      });
+	    if (!g.pointer0) {
+	      g.pointer0 = p;
+	      started = true;
+	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+	      g.pointer1 = p;
+	    }
+
+	    if (started) {
+	      interrupt(this);
+	      g.start(d3_event);
 	    }
 	  }
 
-	  function upload(changeset) {
-	    var osm = context.connection();
+	  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;
 
-	    if (!osm) {
-	      _errors.push({
-	        msg: 'No OSM Service'
-	      });
+	    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(d3_event);
+	      return;
 	    }
 
-	    if (_conflicts.length) {
-	      didResultInConflicts(changeset);
-	    } else if (_errors.length) {
-	      didResultInErrors();
-	    } else {
-	      var history = context.history();
-	      var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
 
-	      if (changes.modified.length || changes.created.length || changes.deleted.length) {
-	        dispatch$1.call('willAttemptUpload', this);
-	        osm.putChangeset(changeset, changes, uploadCallback);
-	      } else {
-	        // changes were insignificant or reverted by user
-	        didResultInNoChanges();
-	      }
-	    }
-	  }
+	    var loc = _pointerLocGetter(d3_event);
 
-	  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
-	          })]
-	        });
+	    var t, p, l;
+	    if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+	    t = _transform;
 
-	        didResultInErrors();
-	      }
+	    if (g.pointer1) {
+	      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));
+	      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.pointer0) {
+	      p = g.pointer0[0];
+	      l = g.pointer0[1];
 	    } else {
-	      didResultInSuccess(changeset);
+	      return;
 	    }
-	  }
-
-	  function didResultInNoChanges() {
-	    dispatch$1.call('resultNoChanges', this);
-	    endSave();
-	    context.flush(); // reset iD
-	  }
 
-	  function didResultInErrors() {
-	    context.history().pop();
-	    dispatch$1.call('resultErrors', this, _errors);
-	    endSave();
+	    g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
 	  }
 
-	  function didResultInConflicts(changeset) {
-	    _conflicts.sort(function (a, b) {
-	      return b.id.localeCompare(a.id);
-	    });
+	  function pointerup(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
-	    dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
-	    endSave();
-	  }
+	    _downPointerIDs["delete"](d3_event.pointerId);
 
-	  function didResultInSuccess(changeset) {
-	    // delete the edit stack cached to local storage
-	    context.history().clearSaved();
-	    dispatch$1.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678
+	    if (!_activeGesture) return;
+	    var g = gesture(this, arguments);
+	    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;
 
-	    window.setTimeout(function () {
-	      endSave();
-	      context.flush(); // reset iD
-	    }, 2500);
-	  }
+	    if (g.pointer1 && !g.pointer0) {
+	      g.pointer0 = g.pointer1;
+	      delete g.pointer1;
+	    }
 
-	  function endSave() {
-	    _isSaving = false;
-	    dispatch$1.call('saveEnded', this);
+	    if (g.pointer0) {
+	      g.pointer0[1] = _transform.invert(g.pointer0[0]);
+	    } else {
+	      g.end(d3_event);
+	    }
 	  }
 
-	  uploader.cancelConflictResolution = function () {
-	    context.history().pop();
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
 	  };
 
-	  uploader.processResolvedConflicts = function (changeset) {
-	    var history = context.history();
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+	  };
 
-	    for (var i = 0; i < _conflicts.length; i++) {
-	      if (_conflicts[i].chosen === 1) {
-	        // user chose "use theirs"
-	        var entity = context.hasEntity(_conflicts[i].id);
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	        if (entity && entity.type === 'way') {
-	          var children = utilArrayUniq(entity.nodes);
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
-	          for (var j = 0; j < children.length; j++) {
-	            history.replace(actionRevert(children[j]));
-	          }
-	        }
+	  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]]];
+	  };
 
-	        history.replace(actionRevert(_conflicts[i].id));
-	      }
-	    }
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	    uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
 	  };
 
-	  uploader.reset = function () {};
+	  zoom._transform = function (_) {
+	    return arguments.length ? (_transform = _, zoom) : _transform;
+	  };
 
-	  return uploader;
+	  return utilRebind(zoom, dispatch, 'on');
 	}
 
-	var abs$4 = Math.abs;
-	var exp$2 = Math.exp;
-	var E = Math.E;
+	// if pointer events are supported. Falls back to default `dblclick` event.
 
-	var FORCED$g = fails(function () {
-	  return Math.sinh(-2e-17) != -2e-17;
-	});
+	function utilDoubleUp() {
+	  var dispatch = dispatch$8('doubleUp');
+	  var _maxTimespan = 500; // milliseconds
 
-	// `Math.sinh` method
-	// https://tc39.github.io/ecma262/#sec-math.sinh
-	// V8 near Chromium 38 has a problem with very small numbers
-	_export({ target: 'Math', stat: true, forced: FORCED$g }, {
-	  sinh: function sinh(x) {
-	    return abs$4(x = +x) < 1 ? (mathExpm1(x) - mathExpm1(-x)) / 2 : (exp$2(x - 1) - exp$2(-x - 1)) * (E / 2);
+	  var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
+
+	  var _pointer; // object representing the pointer that could trigger double up
+
+
+	  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 isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
+	  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
 
-	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;
-	});
+	    if (_pointer && !pointerIsValidFor(loc)) {
+	      // if this pointer is no longer valid, clear it so another can be started
+	      _pointer = undefined;
+	    }
 
-	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 (!_pointer) {
+	      _pointer = {
+	        startLoc: loc,
+	        startTime: new Date().getTime(),
+	        upCount: 0,
+	        pointerId: d3_event.pointerId
+	      };
+	    } else {
+	      // double down
+	      _pointer.pointerId = d3_event.pointerId;
+	    }
+	  }
 
-	function vintageRange(vintage) {
-	  var s;
+	  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;
 
-	  if (vintage.start || vintage.end) {
-	    s = vintage.start || '?';
+	    if (_pointer.upCount === 2) {
+	      // double up!
+	      var loc = [d3_event.clientX, d3_event.clientY];
 
-	    if (vintage.start !== vintage.end) {
-	      s += ' - ' + (vintage.end || '?');
+	      if (pointerIsValidFor(loc)) {
+	        var locInThis = utilFastMouse(this)(d3_event);
+	        dispatch.call('doubleUp', this, d3_event, locInThis);
+	      } // clear the pointer info in any case
+
+
+	      _pointer = undefined;
 	    }
 	  }
 
-	  return s;
+	  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);
+	  };
+
+	  return utilRebind(doubleUp, dispatch, 'on');
 	}
 
-	function rendererBackgroundSource(data) {
-	  var source = Object.assign({}, data); // shallow copy
+	var TILESIZE = 256;
+	var minZoom = 2;
+	var maxZoom = 24;
+	var kMin = geoZoomToScale(minZoom, TILESIZE);
+	var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-	  var _offset = [0, 0];
-	  var _name = source.name;
-	  var _description = source.description;
+	function clamp$1(num, min, max) {
+	  return Math.max(min, Math.min(num, max));
+	}
 
-	  var _best = !!source.best;
+	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;
 
-	  var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
+	  var _selection = select(null);
 
-	  source.tileSize = data.tileSize || 256;
-	  source.zoomExtent = data.zoomExtent || [0, 22];
-	  source.overzoom = data.overzoom !== false;
+	  var supersurface = select(null);
+	  var wrapper = select(null);
+	  var surface = select(null);
+	  var _dimensions = [1, 1];
+	  var _dblClickZoomEnabled = true;
+	  var _redrawEnabled = true;
 
-	  source.offset = function (val) {
-	    if (!arguments.length) return _offset;
-	    _offset = val;
-	    return source;
-	  };
+	  var _gestureTransformStart;
 
-	  source.nudge = function (val, zoomlevel) {
-	    _offset[0] += val[0] / Math.pow(2, zoomlevel);
-	    _offset[1] += val[1] / Math.pow(2, zoomlevel);
-	    return source;
-	  };
+	  var _transformStart = projection.transform();
 
-	  source.name = function () {
-	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	    return _t('imagery.' + id_safe + '.name', {
-	      "default": _name
-	    });
-	  };
+	  var _transformLast;
 
-	  source.label = function () {
-	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	    return _t.html('imagery.' + id_safe + '.name', {
-	      "default": _name
-	    });
-	  };
+	  var _isTransformed = false;
+	  var _minzoom = 0;
 
-	  source.description = function () {
-	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	    return _t.html('imagery.' + id_safe + '.description', {
-	      "default": _description
-	    });
-	  };
+	  var _getMouseCoords;
 
-	  source.best = function () {
-	    return _best;
-	  };
+	  var _lastPointerEvent;
 
-	  source.area = function () {
-	    if (!data.polygon) return Number.MAX_VALUE; // worldwide
+	  var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-	    var area = d3_geoArea({
-	      type: 'MultiPolygon',
-	      coordinates: [data.polygon]
-	    });
-	    return isNaN(area) ? 0 : area;
-	  };
 
-	  source.imageryUsed = function () {
-	    return _name || source.id;
-	  };
+	  var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-	  source.template = function (val) {
-	    if (!arguments.length) return _template;
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
-	    if (source.id === 'custom') {
-	      _template = val;
-	    }
 
-	    return source;
-	  };
+	  var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
-	  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)
+	  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;
+	  });
 
-	    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';
+	  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);
 	      }
 	    }
 
-	    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;
-	        };
+	    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
 
-	        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)));
+	    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
 
-	        switch (source.projection) {
-	          case 'EPSG:4326':
-	            return {
-	              x: lon * 180 / Math.PI,
-	              y: lat * 180 / Math.PI
-	            };
+	    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;
 
-	          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]
-	            };
-	        }
-	      };
+	      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
 
-	      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;
+	    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
 
-	          case 'proj':
-	            return projection;
 
-	          case 'wkid':
-	            return projection.replace(/^EPSG:/, '');
+	    updateAreaFill();
 
-	          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;
-	            }
+	    _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+	      if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
 
-	          case 'w':
-	            return minXmaxY.x;
+	      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);
+	    });
 
-	          case 's':
-	            return maxXminY.y;
+	    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.
 
-	          case 'n':
-	            return maxXminY.x;
+	      var graph = context.graph();
+	      var selectedAndParents = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
 
-	          case 'e':
-	            return minXmaxY.y;
+	        if (entity) {
+	          selectedAndParents[entity.id] = entity;
 
-	          default:
-	            return token;
+	          if (entity.type === 'node') {
+	            graph.parentWays(entity).forEach(function (parent) {
+	              selectedAndParents[parent.id] = parent;
+	            });
+	          }
 	        }
 	      });
-	    } 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();
-	        }
+	      var data = Object.values(selectedAndParents);
 
-	        return u;
-	      });
-	    } // these apply to any type..
+	      var filter = function filter(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.call('drawn', this, {
+	        full: false
+	      }); // redraw everything else later
 
-	    result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
-	      var subdomains = r.split(',');
-	      return subdomains[(coord[0] + coord[1]) % subdomains.length];
+	      scheduleRedraw();
 	    });
-	    return result;
-	  };
+	    map.dimensions(utilGetDimensions(selection));
+	  }
 
-	  source.validZoom = function (z) {
-	    return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
-	  };
+	  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;
 
-	  source.isLocatorOverlay = function () {
-	    return source.id === 'mapbox_locator_overlay';
-	  };
-	  /* hides a source from the list, but leaves it available for use */
+	      for (var i = 0; i < listeners.length; i++) {
+	        var listener = listeners[i];
 
+	        if (listener.name === 'zoom' && listener.type === 'mouseup') {
+	          hasOrphan = true;
+	          break;
+	        }
+	      }
 
-	  source.isHidden = function () {
-	    return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
-	  };
+	      if (hasOrphan) {
+	        var event = window.CustomEvent;
 
-	  source.copyrightNotices = function () {};
+	        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.
 
-	  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;
-	}
+	        event.view = window;
+	        window.dispatchEvent(event);
+	      }
+	    }
 
-	rendererBackgroundSource.Bing = function (data, dispatch) {
-	  // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-	  // http://msdn.microsoft.com/en-us/library/ff701701.aspx
-	  data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
-	  var bing = rendererBackgroundSource(data); // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
+	    return d3_event.button !== 2; // ignore right clicks
+	  }
 
-	  var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
+	  function pxCenter() {
+	    return [_dimensions[0] / 2, _dimensions[1] / 2];
+	  }
 
-	  var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
-	  var cache = {};
-	  var inflight = {};
-	  var providers = [];
-	  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 */
-	  });
+	  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;
 
-	  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;
+	    if (map.isInWideSelection()) {
+	      data = [];
+	      utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
+	        var entity = context.hasEntity(id);
+	        if (entity) data.push(entity);
 	      });
-	    }).map(function (provider) {
-	      return provider.attribution;
-	    }).join(', ');
-	  };
+	      fullRedraw = true;
+	      filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
 
-	  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
+	      applyFeatureLayerFilters = false;
+	    } else if (difference) {
+	      var complete = difference.complete(map.extent());
+	      data = Object.values(complete).filter(Boolean);
+	      set = new Set(Object.keys(complete));
 
-	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
-	    if (inflight[tileID]) return;
+	      filter = function filter(d) {
+	        return set.has(d.id);
+	      };
 
-	    if (!cache[tileID]) {
-	      cache[tileID] = {};
-	    }
+	      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 (cache[tileID] && cache[tileID].metadata) {
-	      return callback(null, cache[tileID].metadata);
+	      if (extent) {
+	        data = context.history().intersects(map.extent().intersection(extent));
+	        set = new Set(data.map(function (entity) {
+	          return entity.id;
+	        }));
+
+	        filter = function filter(d) {
+	          return set.has(d.id);
+	        };
+	      } else {
+	        data = all;
+	        fullRedraw = true;
+	        filter = utilFunctor(true);
+	      }
 	    }
 
-	    inflight[tileID] = true;
-	    d3_json(url).then(function (result) {
-	      delete inflight[tileID];
+	    if (applyFeatureLayerFilters) {
+	      data = features.filter(data, graph);
+	    } else {
+	      context.features().resetStats();
+	    }
 
-	      if (!result) {
-	        throw new Error('Unknown Error');
-	      }
+	    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());
+	    }
 
-	      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);
+	    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);
 	  };
 
-	  bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
-	  return bing;
-	};
+	  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();
 
-	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';
+	    if (mode && !allowed[mode.id]) {
+	      context.enter(modeBrowse(context));
+	    }
+
+	    dispatch.call('drawn', this, {
+	      full: true
+	    });
 	  }
 
-	  var esri = rendererBackgroundSource(data);
-	  var cache = {};
-	  var inflight = {};
+	  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
 
-	  var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
-	  // https://developers.arcgis.com/documentation/tiled-elevation-service/
+	    e2._rotation = e.rotation; // preserve the original rotation
 
+	    _selection.node().dispatchEvent(e2);
+	  }
 
-	  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
+	  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.
 
-	    var z = 20; // first generate a random url using the template
+	    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
 
-	    var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
+	      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
 
-	    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
+	        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
 
-	    d3_json(tilemapUrl).then(function (tilemap) {
-	      if (!tilemap) {
-	        throw new Error('Unknown Error');
-	      }
+	        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
 
-	      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;
+	      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 any tiles are missing at level 20 we restrict maxZoom to 19
+	      }
+	    }
 
+	    if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+	      return; // no change
+	    }
 
-	      esri.zoomExtent[1] = hasTiles ? 22 : 19;
-	    })["catch"](function () {
-	      /* ignore */
-	    });
-	  };
+	    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;
+	    }
 
-	  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)
+	    projection.transform(eventTransform);
+	    var withinEditableZoom = map.withinEditableZoom();
 
-	    var unknown = _t('info_panels.background.unknown');
-	    var metadataLayer;
-	    var vintage = {};
-	    var metadata = {};
-	    if (inflight[tileID]) return;
+	    if (_lastWithinEditableZoom !== withinEditableZoom) {
+	      if (_lastWithinEditableZoom !== undefined) {
+	        // notify that the map zoomed in or out over the editable zoom threshold
+	        dispatch.call('crossEditableZoom', this, withinEditableZoom);
+	      }
 
-	    switch (true) {
-	      case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
-	        metadataLayer = 4;
-	        break;
+	      _lastWithinEditableZoom = withinEditableZoom;
+	    }
 
-	      case zoom >= 19:
-	        metadataLayer = 3;
-	        break;
+	    var scale = k / _transformStart.k;
+	    var tX = (x / scale - _transformStart.x) * scale;
+	    var tY = (y / scale - _transformStart.y) * scale;
 
-	      case zoom >= 17:
-	        metadataLayer = 2;
-	        break;
+	    if (context.inIntro()) {
+	      curtainProjection.transform({
+	        x: x - tX,
+	        y: y - tY,
+	        k: k
+	      });
+	    }
+
+	    if (source) {
+	      _lastPointerEvent = event;
+	    }
+
+	    _isTransformed = true;
+	    _transformLast = eventTransform;
+	    utilSetTransform(supersurface, tX, tY, scale);
+	    scheduleRedraw();
+	    dispatch.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;
+	  }
 
-	      case zoom >= 13:
-	        metadataLayer = 0;
-	        break;
+	  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.
 
-	      default:
-	        metadataLayer = 99;
+	    if (resetTransform()) {
+	      difference = extent = undefined;
 	    }
 
-	    var url; // build up query using the layer appropriate to the current zoom
+	    var zoom = map.zoom();
+	    var z = String(~~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/';
-	    }
+	    if (surface.attr('data-zoom') !== z) {
+	      surface.attr('data-zoom', z);
+	    } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
-	    url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
-	    if (!cache[tileID]) {
-	      cache[tileID] = {};
-	    }
+	    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));
 
-	    if (cache[tileID] && cache[tileID].metadata) {
-	      return callback(null, cache[tileID].metadata);
-	    } // accurate metadata is only available >= 13
+	    if (!difference) {
+	      supersurface.call(context.background());
+	      wrapper.call(drawLayers);
+	    } // OSM
 
 
-	    if (metadataLayer === 99) {
-	      vintage = {
-	        start: null,
-	        end: null,
-	        range: null
-	      };
-	      metadata = {
-	        vintage: null,
-	        source: unknown,
-	        description: unknown,
-	        resolution: unknown,
-	        accuracy: unknown
-	      };
-	      callback(null, metadata);
+	    if (map.editableDataEnabled() || map.isInWideSelection()) {
+	      context.loadTiles(projection);
+	      drawEditable(difference, extent);
 	    } else {
-	      inflight[tileID] = true;
-	      d3_json(url).then(function (result) {
-	        delete inflight[tileID];
+	      editOff();
+	    }
 
-	        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
+	    _transformStart = projection.transform();
+	    return map;
+	  }
 
-	        if (isFinite(metadata.resolution)) {
-	          metadata.resolution += ' m';
-	        }
+	  var immediateRedraw = function immediateRedraw(difference, extent) {
+	    if (!difference && !extent) cancelPendingRedraw();
+	    redraw(difference, extent);
+	  };
 
-	        if (isFinite(metadata.accuracy)) {
-	          metadata.accuracy += ' m';
-	        }
+	  map.lastPointerEvent = function () {
+	    return _lastPointerEvent;
+	  };
 
-	        cache[tileID].metadata = metadata;
-	        if (callback) callback(null, metadata);
-	      })["catch"](function (err) {
-	        delete inflight[tileID];
-	        if (callback) callback(err.message);
-	      });
-	    }
+	  map.mouse = function (d3_event) {
+	    var event = d3_event || _lastPointerEvent;
 
-	    function clean(val) {
-	      return String(val).trim() || unknown;
+	    if (event) {
+	      var s;
+
+	      while (s = event.sourceEvent) {
+	        event = s;
+	      }
+
+	      return _getMouseCoords(event);
 	    }
-	  };
 
-	  return esri;
-	};
+	    return null;
+	  }; // returns Lng/Lat
 
-	rendererBackgroundSource.None = function () {
-	  var source = rendererBackgroundSource({
-	    id: 'none',
-	    template: ''
-	  });
 
-	  source.name = function () {
-	    return _t('background.none');
+	  map.mouseCoordinates = function () {
+	    var coord = map.mouse() || pxCenter();
+	    return projection.invert(coord);
 	  };
 
-	  source.label = function () {
-	    return _t.html('background.none');
+	  map.dblclickZoomEnable = function (val) {
+	    if (!arguments.length) return _dblClickZoomEnabled;
+	    _dblClickZoomEnabled = val;
+	    return map;
 	  };
 
-	  source.imageryUsed = function () {
-	    return null;
+	  map.redrawEnable = function (val) {
+	    if (!arguments.length) return _redrawEnabled;
+	    _redrawEnabled = val;
+	    return map;
 	  };
 
-	  source.area = function () {
-	    return -1; // sources in background pane are sorted by area
+	  map.isTransformed = function () {
+	    return _isTransformed;
 	  };
 
-	  return source;
-	};
+	  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;
 
-	rendererBackgroundSource.Custom = function (template) {
-	  var source = rendererBackgroundSource({
-	    id: 'custom',
-	    template: template
-	  });
+	    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;
 
-	  source.name = function () {
-	    return _t('background.custom');
+	      _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$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();
+
+	      _selection.call(_zoomerPanner.transform, _transformStart);
+
+	      dispatch.call('move', this, map);
+	      immediateRedraw();
+	    }
+
+	    return map;
 	  };
 
-	  source.label = function () {
-	    return _t.html('background.custom');
+	  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;
 	  };
 
-	  source.imageryUsed = function () {
-	    // sanitize personal connection tokens - #6801
-	    var cleaned = source.template(); // from query string parameters
+	  function zoomIn(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	  }
 
-	    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
+	  function zoomOut(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	  }
 
+	  map.zoomIn = function () {
+	    zoomIn(1);
+	  };
 
-	    cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
-	    return 'Custom (' + cleaned + ' )';
+	  map.zoomInFurther = function () {
+	    zoomIn(4);
 	  };
 
-	  source.area = function () {
-	    return -2; // sources in background pane are sorted by area
+	  map.canZoomIn = function () {
+	    return map.zoom() < maxZoom;
 	  };
 
-	  return source;
-	};
+	  map.zoomOut = function () {
+	    zoomOut(1);
+	  };
 
-	function rendererTileLayer(context) {
-	  var transformProp = utilPrefixCSSProperty('Transform');
-	  var tiler = utilTiler();
-	  var _tileSize = 256;
+	  map.zoomOutFurther = function () {
+	    zoomOut(4);
+	  };
 
-	  var _projection;
+	  map.canZoomOut = function () {
+	    return map.zoom() > minZoom;
+	  };
 
-	  var _cache = {};
+	  map.center = function (loc2) {
+	    if (!arguments.length) {
+	      return projection.invert(pxCenter());
+	    }
 
-	  var _tileOrigin;
+	    if (setCenterZoom(loc2, map.zoom())) {
+	      dispatch.call('move', this, map);
+	    }
 
-	  var _zoom;
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	  var _source;
+	  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
 
-	  function tileSizeAtZoom(d, z) {
-	    var EPSILON = 0.002; // close seams
+	    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);
+	  };
 
-	    return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
-	  }
+	  map.unobscuredOffsetPx = function () {
+	    var openPane = context.container().select('.map-panes .map-pane.shown');
 
-	  function atZoom(t, distance) {
-	    var power = Math.pow(2, distance);
-	    return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
-	  }
+	    if (!openPane.empty()) {
+	      return [openPane.node().offsetWidth / 2, 0];
+	    }
 
-	  function lookUp(d) {
-	    for (var up = -1; up > -d[2]; up--) {
-	      var tile = atZoom(d, up);
+	    return [0, 0];
+	  };
 
-	      if (_cache[_source.url(tile)] !== false) {
-	        return tile;
-	      }
+	  map.zoom = function (z2) {
+	    if (!arguments.length) {
+	      return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
 	    }
-	  }
 
-	  function uniqueBy(a, n) {
-	    var o = [];
-	    var seen = {};
+	    if (z2 < _minzoom) {
+	      surface.interrupt();
+	      dispatch.call('hitMinZoom', this, map);
+	      z2 = context.minEditableZoom();
+	    }
 
-	    for (var i = 0; i < a.length; i++) {
-	      if (seen[a[i][n]] === undefined) {
-	        o.push(a[i]);
-	        seen[a[i][n]] = true;
-	      }
+	    if (setCenterZoom(map.center(), z2)) {
+	      dispatch.call('move', this, map);
 	    }
 
-	    return o;
-	  }
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	  function addSource(d) {
-	    d.push(_source.url(d));
-	    return d;
-	  } // Update tiles based on current state of `projection`.
+	  map.centerZoom = function (loc2, z2) {
+	    if (setCenterZoom(loc2, z2)) {
+	      dispatch.call('move', this, map);
+	    }
 
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	  function background(selection) {
-	    _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
-	    var pixelOffset;
+	  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);
+	  };
 
-	    if (_source) {
-	      pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
-	    } else {
-	      pixelOffset = [0, 0];
-	    }
+	  map.centerEase = function (loc2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, map.zoom(), duration);
+	    return map;
+	  };
 
-	    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).
+	  map.zoomEase = function (z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(map.center(), z2, duration, false);
+	    return map;
+	  };
 
+	  map.centerZoomEase = function (loc2, z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, z2, duration, false);
+	    return map;
+	  };
 
-	  function render(selection) {
-	    if (!_source) return;
-	    var requests = [];
-	    var showDebug = context.getDebug('tile') && !_source.overlay;
+	  map.transformEase = function (t2, duration) {
+	    duration = duration || 250;
+	    setTransform(t2, duration, false
+	    /* don't force */
+	    );
+	    return map;
+	  };
 
-	    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
+	  map.zoomToEase = function (obj, duration) {
+	    var extent;
 
-	        requests.push(d);
+	    if (Array.isArray(obj)) {
+	      obj.forEach(function (entity) {
+	        var entityExtent = entity.extent(context.graph());
 
-	        if (_cache[d[3]] === false && lookUp(d)) {
-	          requests.push(addSource(lookUp(d)));
+	        if (!extent) {
+	          extent = entityExtent;
+	        } else {
+	          extent = extent.extend(entityExtent);
 	        }
 	      });
-	      requests = uniqueBy(requests, 3).filter(function (r) {
-	        // don't re-request tiles which have failed in the past
-	        return _cache[r[3]] !== false;
-	      });
+	    } else {
+	      extent = obj.extent(context.graph());
 	    }
 
-	    function load(d3_event, d) {
-	      _cache[d[3]] = true;
-	      select(this).on('error', null).on('load', null).classed('tile-loaded', true);
-	      render(selection);
-	    }
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoomEase(extent.center(), z2, duration);
+	  };
 
-	    function error(d3_event, d) {
-	      _cache[d[3]] = false;
-	      select(this).on('error', null).on('load', null).remove();
-	      render(selection);
-	    }
+	  map.startEase = function () {
+	    utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+	      map.cancelEase();
+	    });
+	    return map;
+	  };
 
-	    function imageTransform(d) {
-	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+	  map.cancelEase = function () {
+	    _selection.interrupt();
 
-	      var scale = tileSizeAtZoom(d, _zoom);
-	      return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
-	    }
+	    return map;
+	  };
 
-	    function tileCenter(d) {
-	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+	  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));
+	    }
+	  };
 
-	      return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
+	  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 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)
+	  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;
+	  }
 
-	    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);
+	  map.extentZoom = function (val) {
+	    return calcExtentZoom(geoExtent(val), _dimensions);
+	  };
 
-	      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();
+	  map.trimmedExtentZoom = function (val) {
+	    var trimY = 120;
+	    var trimX = 40;
+	    var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+	    return calcExtentZoom(geoExtent(val), trimmed);
+	  };
 
-	    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));
+	  map.withinEditableZoom = function () {
+	    return map.zoom() >= context.minEditableZoom();
+	  };
 
-	        _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'));
-	        });
-	      });
-	    }
-	  }
+	  map.isInWideSelection = function () {
+	    return !map.withinEditableZoom() && context.selectedIDs().length;
+	  };
 
-	  background.projection = function (val) {
-	    if (!arguments.length) return _projection;
-	    _projection = val;
-	    return background;
+	  map.editableDataEnabled = function (skipZoomCheck) {
+	    var layer = context.layers().layer('osm');
+	    if (!layer || !layer.enabled()) return false;
+	    return skipZoomCheck || map.withinEditableZoom();
 	  };
 
-	  background.dimensions = function (val) {
-	    if (!arguments.length) return tiler.size();
-	    tiler.size(val);
-	    return background;
+	  map.notesEditable = function () {
+	    var layer = context.layers().layer('notes');
+	    if (!layer || !layer.enabled()) return false;
+	    return map.withinEditableZoom();
 	  };
 
-	  background.source = function (val) {
-	    if (!arguments.length) return _source;
-	    _source = val;
-	    _tileSize = _source.tileSize;
-	    _cache = {};
-	    tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-	    return background;
+	  map.minzoom = function (val) {
+	    if (!arguments.length) return _minzoom;
+	    _minzoom = val;
+	    return map;
 	  };
 
-	  return background;
-	}
+	  map.toggleHighlightEdited = function () {
+	    surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+	    map.pan([0, 0]); // trigger a redraw
 
-	var _imageryIndex = null;
-	function rendererBackground(context) {
-	  var dispatch$1 = dispatch('change');
-	  var detected = utilDetect();
-	  var baseLayer = rendererTileLayer(context).projection(context.projection);
-	  var _isValid = true;
-	  var _overlayLayers = [];
-	  var _brightness = 1;
-	  var _contrast = 1;
-	  var _saturation = 1;
-	  var _sharpness = 1;
+	    dispatch.call('changeHighlighting', this);
+	  };
 
-	  function ensureImageryIndex() {
-	    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
+	  map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-	      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]] ]
+	  map.activeAreaFill = function (val) {
+	    if (!arguments.length) return corePreferences('area-fill') || 'partial';
+	    corePreferences('area-fill', val);
 
-	        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
+	    if (val !== 'wireframe') {
+	      corePreferences('area-fill-toggle', val);
+	    }
 
-	      _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'
+	    updateAreaFill();
+	    map.pan([0, 0]); // trigger a redraw
 
-	      _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
+	    dispatch.call('changeAreaFill', this);
+	    return map;
+	  };
 
+	  map.toggleWireframe = function () {
+	    var activeFill = map.activeAreaFill();
 
-	      var template = corePreferences('background-custom-template') || '';
-	      var custom = rendererBackgroundSource.Custom(template);
+	    if (activeFill === 'wireframe') {
+	      activeFill = corePreferences('area-fill-toggle') || 'partial';
+	    } else {
+	      activeFill = 'wireframe';
+	    }
 
-	      _imageryIndex.backgrounds.unshift(custom);
+	    map.activeAreaFill(activeFill);
+	  };
 
-	      return _imageryIndex;
+	  function updateAreaFill() {
+	    var activeFill = map.activeAreaFill();
+	    map.areaFillOptions.forEach(function (opt) {
+	      surface.classed('fill-' + opt, Boolean(opt === activeFill));
 	    });
 	  }
 
-	  function background(selection) {
-	    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
+	  map.layers = function () {
+	    return drawLayers;
+	  };
 
+	  map.doubleUpHandler = function () {
+	    return _doubleUpHandler;
+	  };
 
-	    var sources = background.sources(context.map().extent());
-	    var wasValid = _isValid;
-	    _isValid = !!sources.filter(function (d) {
-	      return d === currSource;
-	    }).length;
+	  return utilRebind(map, dispatch, 'on');
+	}
 
-	    if (wasValid !== _isValid) {
-	      // change in valid status
-	      background.updateImagery();
-	    }
+	function rendererPhotos(context) {
+	  var dispatch = dispatch$8('change');
+	  var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'kartaview'];
+	  var _allPhotoTypes = ['flat', 'panoramic'];
 
-	    var baseFilter = '';
+	  var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-	    if (detected.cssfilters) {
-	      if (_brightness !== 1) {
-	        baseFilter += " brightness(".concat(_brightness, ")");
-	      }
 
-	      if (_contrast !== 1) {
-	        baseFilter += " contrast(".concat(_contrast, ")");
-	      }
+	  var _dateFilters = ['fromDate', 'toDate'];
 
-	      if (_saturation !== 1) {
-	        baseFilter += " saturate(".concat(_saturation, ")");
-	      }
+	  var _fromDate;
 
-	      if (_sharpness < 1) {
-	        // gaussian blur
-	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-	        baseFilter += " blur(".concat(blur, "px)");
-	      }
-	    }
+	  var _toDate;
 
-	    var base = selection.selectAll('.layer-background').data([0]);
-	    base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
+	  var _usernames;
 
-	    if (detected.cssfilters) {
-	      base.style('filter', baseFilter || null);
-	    } else {
-	      base.style('opacity', _brightness);
-	    }
+	  function photos() {}
 
-	    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 = '';
+	  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;
+	    });
 
-	    if (detected.cssfilters && _sharpness > 1) {
-	      // apply unsharp mask
-	      mixBlendMode = 'overlay';
-	      maskFilter = 'saturate(0) blur(3px) invert(1)';
-	      var contrast = _sharpness - 1;
-	      maskFilter += " contrast(".concat(contrast, ")");
-	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-	      maskFilter += " brightness(".concat(brightness, ")");
+	    if (enabled.length) {
+	      hash.photo_overlay = enabled.join(',');
+	    } else {
+	      delete hash.photo_overlay;
 	    }
 
-	    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);
-	    });
+	    window.location.replace('#' + utilQsString(hash, true));
 	  }
 
-	  background.updateImagery = function () {
-	    var currSource = baseLayer.source();
-	    if (context.inIntro() || !currSource) return;
+	  photos.overlayLayerIDs = function () {
+	    return _layerIDs;
+	  };
 
-	    var o = _overlayLayers.filter(function (d) {
-	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
-	    }).map(function (d) {
-	      return d.source().id;
-	    }).join(',');
+	  photos.allPhotoTypes = function () {
+	    return _allPhotoTypes;
+	  };
 
-	    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;
+	  photos.dateFilters = function () {
+	    return _dateFilters;
+	  };
 
-	    if (id === 'custom') {
-	      id = "custom:".concat(currSource.template());
-	    }
+	  photos.dateFilterValue = function (val) {
+	    return val === _dateFilters[0] ? _fromDate : _toDate;
+	  };
 
-	    if (id) {
-	      hash.background = id;
-	    } else {
-	      delete hash.background;
-	    }
+	  photos.setDateFilter = function (type, val, updateUrl) {
+	    // validate the date
+	    var date = val && new Date(val);
 
-	    if (o) {
-	      hash.overlays = o;
+	    if (date && !isNaN(date)) {
+	      val = date.toISOString().substr(0, 10);
 	    } else {
-	      delete hash.overlays;
+	      val = null;
 	    }
 
-	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-	      hash.offset = "".concat(x, ",").concat(y);
-	    } else {
-	      delete hash.offset;
-	    }
+	    if (type === _dateFilters[0]) {
+	      _fromDate = val;
 
-	    if (!window.mocha) {
-	      window.location.replace('#' + utilQsString(hash, true));
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _toDate = _fromDate;
+	      }
 	    }
 
-	    var imageryUsed = [];
-	    var photoOverlaysUsed = [];
-	    var currUsed = currSource.imageryUsed();
+	    if (type === _dateFilters[1]) {
+	      _toDate = val;
 
-	    if (currUsed && _isValid) {
-	      imageryUsed.push(currUsed);
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _fromDate = _toDate;
+	      }
 	    }
 
-	    _overlayLayers.filter(function (d) {
-	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
-	    }).forEach(function (d) {
-	      return imageryUsed.push(d.source().imageryUsed());
-	    });
+	    dispatch.call('change', this);
 
-	    var dataLayer = context.layers().layer('data');
+	    if (updateUrl) {
+	      var rangeString;
 
-	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-	      imageryUsed.push(dataLayer.getSrc());
+	      if (_fromDate || _toDate) {
+	        rangeString = (_fromDate || '') + '_' + (_toDate || '');
+	      }
+
+	      setUrlFilterValue('photo_dates', rangeString);
 	    }
+	  };
 
-	    var photoOverlayLayers = {
-	      streetside: 'Bing Streetside',
-	      mapillary: 'Mapillary Images',
-	      'mapillary-map-features': 'Mapillary Map Features',
-	      'mapillary-signs': 'Mapillary Signs',
-	      openstreetcam: 'OpenStreetCam Images'
-	    };
+	  photos.setUsernameFilter = function (val, updateUrl) {
+	    if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-	    for (var layerID in photoOverlayLayers) {
-	      var layer = context.layers().layer(layerID);
+	    if (val) {
+	      val = val.map(function (d) {
+	        return d.trim();
+	      }).filter(Boolean);
 
-	      if (layer && layer.enabled()) {
-	        photoOverlaysUsed.push(layerID);
-	        imageryUsed.push(photoOverlayLayers[layerID]);
+	      if (!val.length) {
+	        val = null;
 	      }
 	    }
 
-	    context.history().imageryUsed(imageryUsed);
-	    context.history().photoOverlaysUsed(photoOverlaysUsed);
-	  };
-
-	  var _checkedBlocklists;
-
-	  background.sources = function (extent, zoom, includeCurrent) {
-	    if (!_imageryIndex) return []; // called before init()?
+	    _usernames = val;
+	    dispatch.call('change', this);
 
-	    var visible = {};
-	    (_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 (updateUrl) {
+	      var hashString;
 
-	    if (blocklists && blocklists !== _checkedBlocklists) {
-	      _imageryIndex.backgrounds.forEach(function (source) {
-	        source.isBlocked = blocklists.some(function (blocklist) {
-	          return blocklist.test(source.template());
-	        });
-	      });
+	      if (_usernames) {
+	        hashString = _usernames.join(',');
+	      }
 
-	      _checkedBlocklists = blocklists;
+	      setUrlFilterValue('photo_username', hashString);
 	    }
+	  };
 
-	    return _imageryIndex.backgrounds.filter(function (source) {
-	      if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
+	  function setUrlFilterValue(property, val) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	      if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
+	      if (val) {
+	        if (hash[property] === val) return;
+	        hash[property] = val;
+	      } else {
+	        if (!(property in hash)) return;
+	        delete hash[property];
+	      }
 
-	      if (!source.polygon) return true; // always include imagery with worldwide coverage
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  }
 
-	      if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.supported() && layer.enabled();
+	  }
 
-	      return visible[source.id]; // include imagery visible in given extent
-	    });
+	  photos.shouldFilterByDate = function () {
+	    return showsLayer('mapillary') || showsLayer('kartaview') || showsLayer('streetside');
 	  };
 
-	  background.dimensions = function (val) {
-	    if (!val) return;
-	    baseLayer.dimensions(val);
-
-	    _overlayLayers.forEach(function (layer) {
-	      return layer.dimensions(val);
-	    });
+	  photos.shouldFilterByPhotoType = function () {
+	    return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('kartaview');
 	  };
 
-	  background.baseLayerSource = function (d) {
-	    if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
+	  photos.shouldFilterByUsername = function () {
+	    return !showsLayer('mapillary') && showsLayer('kartaview') && !showsLayer('streetside');
+	  };
 
-	    var osm = context.connection();
-	    if (!osm) return background;
-	    var blocklists = osm.imageryBlocklists();
-	    var template = d.template();
-	    var fail = false;
-	    var tested = 0;
-	    var regex;
+	  photos.showsPhotoType = function (val) {
+	    if (!photos.shouldFilterByPhotoType()) return true;
+	    return _shownPhotoTypes.indexOf(val) !== -1;
+	  };
 
-	    for (var i = 0; i < blocklists.length; i++) {
-	      regex = blocklists[i];
-	      fail = regex.test(template);
-	      tested++;
-	      if (fail) break;
-	    } // ensure at least one test was run.
+	  photos.showsFlat = function () {
+	    return photos.showsPhotoType('flat');
+	  };
 
+	  photos.showsPanoramic = function () {
+	    return photos.showsPhotoType('panoramic');
+	  };
 
-	    if (!tested) {
-	      regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-	      fail = regex.test(template);
-	    }
+	  photos.fromDate = function () {
+	    return _fromDate;
+	  };
 
-	    baseLayer.source(!fail ? d : background.findSource('none'));
-	    dispatch$1.call('change');
-	    background.updateImagery();
-	    return background;
+	  photos.toDate = function () {
+	    return _toDate;
 	  };
 
-	  background.findSource = function (id) {
-	    if (!id || !_imageryIndex) return null; // called before init()?
+	  photos.togglePhotoType = function (val) {
+	    var index = _shownPhotoTypes.indexOf(val);
 
-	    return _imageryIndex.backgrounds.find(function (d) {
-	      return d.id && d.id === id;
-	    });
-	  };
+	    if (index !== -1) {
+	      _shownPhotoTypes.splice(index, 1);
+	    } else {
+	      _shownPhotoTypes.push(val);
+	    }
 
-	  background.bing = function () {
-	    background.baseLayerSource(background.findSource('Bing'));
+	    dispatch.call('change', this);
+	    return photos;
 	  };
 
-	  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;
-	    });
+	  photos.usernames = function () {
+	    return _usernames;
 	  };
 
-	  background.overlayLayerSources = function () {
-	    return _overlayLayers.map(function (layer) {
-	      return layer.source();
-	    });
-	  };
+	  photos.init = function () {
+	    var hash = utilStringQs(window.location.hash);
 
-	  background.toggleOverlayLayer = function (d) {
-	    var layer;
+	    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);
+	    }
 
-	    for (var i = 0; i < _overlayLayers.length; i++) {
-	      layer = _overlayLayers[i];
+	    if (hash.photo_username) {
+	      this.setUsernameFilter(hash.photo_username, false);
+	    }
 
-	      if (layer.source() === d) {
-	        _overlayLayers.splice(i, 1);
+	    if (hash.photo_overlay) {
+	      // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=kartaview;mapillary;streetside`
+	      var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
+	      hashOverlayIDs.forEach(function (id) {
+	        if (id === 'openstreetcam') id = 'kartaview'; // legacy alias
 
-	        dispatch$1.call('change');
-	        background.updateImagery();
-	        return;
-	      }
+	        var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+	        if (layer && !layer.enabled()) layer.enabled(true);
+	      });
 	    }
 
-	    layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
+	    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);
 
-	    _overlayLayers.push(layer);
+	      if (results && results.length >= 3) {
+	        var serviceId = results[1];
+	        if (serviceId === 'openstreetcam') serviceId = 'kartaview'; // legacy alias
 
-	    dispatch$1.call('change');
-	    background.updateImagery();
-	  };
+	        var photoKey = results[2];
+	        var service = services[serviceId];
 
-	  background.nudge = function (d, zoom) {
-	    var currSource = baseLayer.source();
+	        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;
+	            }
 
-	    if (currSource) {
-	      currSource.nudge(d, zoom);
-	      dispatch$1.call('change');
-	      background.updateImagery();
+	            if (!service.cachedImage(photoKey)) return;
+	            service.on('loadedImages.rendererPhotos', null);
+	            service.ensureViewerLoaded(context).then(function () {
+	              service.selectImage(context, photoKey).showViewer(context);
+	            });
+	          });
+	        }
+	      }
 	    }
 
-	    return background;
+	    context.layers().on('change.rendererPhotos', updateStorage);
 	  };
 
-	  background.offset = function (d) {
-	    var currSource = baseLayer.source();
+	  return utilRebind(photos, dispatch, 'on');
+	}
 
-	    if (!arguments.length) {
-	      return currSource && currSource.offset() || [0, 0];
-	    }
+	function uiAccount(context) {
+	  var osm = context.connection();
 
-	    if (currSource) {
-	      currSource.offset(d);
-	      dispatch$1.call('change');
-	      background.updateImagery();
-	    }
+	  function update(selection) {
+	    if (!osm) return;
 
-	    return background;
-	  };
+	    if (!osm.authenticated()) {
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+	      return;
+	    }
 
-	  background.brightness = function (d) {
-	    if (!arguments.length) return _brightness;
-	    _brightness = d;
-	    if (context.mode()) dispatch$1.call('change');
-	    return background;
-	  };
+	    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
 
-	  background.contrast = function (d) {
-	    if (!arguments.length) return _contrast;
-	    _contrast = d;
-	    if (context.mode()) dispatch$1.call('change');
-	    return background;
-	  };
+	      var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-	  background.saturation = function (d) {
-	    if (!arguments.length) return _saturation;
-	    _saturation = d;
-	    if (context.mode()) dispatch$1.call('change');
-	    return background;
-	  };
+	      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
 
-	  background.sharpness = function (d) {
-	    if (!arguments.length) return _sharpness;
-	    _sharpness = d;
-	    if (context.mode()) dispatch$1.call('change');
-	    return background;
-	  };
 
-	  var _loadPromise;
+	      userLinkA.append('span').attr('class', 'label').html(details.display_name);
+	      logoutLink.append('a').attr('class', 'logout').attr('href', '#').call(_t.append('logout')).on('click.logout', function (d3_event) {
+	        d3_event.preventDefault();
+	        osm.logout();
+	      });
+	    });
+	  }
 
-	  background.ensureLoaded = function () {
-	    if (_loadPromise) return _loadPromise;
+	  return function (selection) {
+	    selection.append('li').attr('class', 'userLink').classed('hide', true);
+	    selection.append('li').attr('class', 'logoutLink').classed('hide', true);
 
-	    function parseMapParams(qmap) {
-	      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 (osm) {
+	      osm.on('change.account', function () {
+	        update(selection);
+	      });
+	      update(selection);
 	    }
+	  };
+	}
 
-	    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;
+	function uiAttribution(context) {
+	  var _selection = select(null);
 
-	      if (!requested && extent) {
-	        best = background.sources(extent).find(function (s) {
-	          return s.best();
-	        });
-	      } // Decide which background layer to display
+	  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]);
 
+	      if (d.terms_html) {
+	        attribution.html(d.terms_html);
+	        return;
+	      }
 
-	      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 (d.terms_url) {
+	        attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
 	      }
 
-	      var locator = imageryIndex.backgrounds.find(function (d) {
-	        return d.overlay && d["default"];
+	      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()
 	      });
 
-	      if (locator) {
-	        background.toggleOverlayLayer(locator);
+	      if (d.icon && !d.overlay) {
+	        attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
 	      }
 
-	      var overlays = (hash.overlays || '').split(',');
-	      overlays.forEach(function (overlay) {
-	        overlay = background.findSource(overlay);
+	      attribution.append('span').attr('class', 'attribution-text').text(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.text(String);
+	  }
 
-	        if (overlay) {
-	          background.toggleOverlayLayer(overlay);
-	        }
-	      });
+	  function update() {
+	    var baselayer = context.background().baseLayerSource();
 
-	      if (hash.gpx) {
-	        var gpx = context.layers().layer('data');
+	    _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-	        if (gpx) {
-	          gpx.url(hash.gpx, '.gpx');
-	        }
-	      }
+	    var z = context.map().zoom();
+	    var overlays = context.background().overlayLayerSources() || [];
 
-	      if (hash.offset) {
-	        var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
-	          return !isNaN(n) && n;
-	        });
+	    _selection.call(render, overlays.filter(function (s) {
+	      return s.validZoom(z);
+	    }), 'overlay-layer-attribution');
+	  }
 
-	        if (offset.length === 2) {
-	          background.offset(geoMetersToOffset(offset));
-	        }
-	      }
-	    })["catch"](function () {
-	      /* ignore */
-	    });
+	  return function (selection) {
+	    _selection = selection;
+	    context.background().on('change.attribution', update);
+	    context.map().on('move.attribution', throttle(update, 400, {
+	      leading: false
+	    }));
+	    update();
 	  };
-
-	  return utilRebind(background, dispatch$1, 'on');
 	}
 
-	function rendererFeatures(context) {
-	  var dispatch$1 = dispatch('change', 'redraw');
-	  var features = utilRebind({}, dispatch$1, 'on');
+	function uiContributors(context) {
+	  var osm = context.connection(),
+	      debouncedUpdate = debounce(function () {
+	    update();
+	  }, 1000),
+	      limit = 4,
+	      hidden = false,
+	      wrap = select(null);
 
-	  var _deferred = new Set();
+	  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').text(String);
 
-	  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
+	    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());
+	      }).text(othersNum);
+	      wrap.append('span').html(_t.html('contributors.truncated_list', {
+	        n: othersNum,
+	        users: {
+	          html: userList.html()
+	        },
+	        count: {
+	          html: count.html()
+	        }
+	      }));
+	    } else {
+	      wrap.append('span').html(_t.html('contributors.list', {
+	        users: {
+	          html: userList.html()
+	        }
+	      }));
+	    }
+
+	    if (!u.length) {
+	      hidden = true;
+	      wrap.transition().style('opacity', 0);
+	    } else if (hidden) {
+	      wrap.transition().style('opacity', 1);
+	    }
+	  }
+
+	  return function (selection) {
+	    if (!osm) return;
+	    wrap = selection;
+	    update();
+	    osm.on('loaded.contributors', debouncedUpdate);
+	    context.map().on('move.contributors', debouncedUpdate);
 	  };
-	  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();
+	var _popoverID = 0;
+	function uiPopover(klass) {
+	  var _id = _popoverID++;
 
-	      if (disabled.length) {
-	        hash.disable_features = disabled.join(',');
-	      } else {
-	        delete hash.disable_features;
-	      }
+	  var _anchorSelection = select(null);
 
-	      window.location.replace('#' + utilQsString(hash, true));
-	      corePreferences('disabled-features', disabled.join(','));
-	    }
+	  var popover = function popover(selection) {
+	    _anchorSelection = selection;
+	    selection.each(setup);
+	  };
 
-	    _hidden = features.hidden();
-	    dispatch$1.call('change');
-	    dispatch$1.call('redraw');
-	  }
+	  var _animation = utilFunctor(false);
 
-	  function defineRule(k, filter, max) {
-	    var isEnabled = true;
+	  var _placement = utilFunctor('top'); // top, bottom, left, right
 
-	    _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 _alignment = utilFunctor('center'); // leading, center, trailing
 
-	  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;
-	    }
+	  var _scrollContainer = utilFunctor(select(null));
 
-	    var strings = Object.keys(tags);
+	  var _content;
 
-	    for (var i = 0; i < strings.length; i++) {
-	      var s = strings[i];
+	  var _displayType = utilFunctor('');
 
-	      if (past_futures[s] || past_futures[tags[s]]) {
-	        return true;
-	      }
-	    }
+	  var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
-	    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('others', function isOther(tags, geometry) {
-	    return geometry === 'line' || geometry === 'area';
-	  });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  features.features = function () {
-	    return _rules;
+	  popover.displayType = function (val) {
+	    if (arguments.length) {
+	      _displayType = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _displayType;
+	    }
 	  };
 
-	  features.keys = function () {
-	    return _keys;
+	  popover.hasArrow = function (val) {
+	    if (arguments.length) {
+	      _hasArrow = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _hasArrow;
+	    }
 	  };
 
-	  features.enabled = function (k) {
-	    if (!arguments.length) {
-	      return _keys.filter(function (k) {
-	        return _rules[k].enabled;
-	      });
+	  popover.placement = function (val) {
+	    if (arguments.length) {
+	      _placement = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _placement;
 	    }
-
-	    return _rules[k] && _rules[k].enabled;
 	  };
 
-	  features.disabled = function (k) {
-	    if (!arguments.length) {
-	      return _keys.filter(function (k) {
-	        return !_rules[k].enabled;
-	      });
+	  popover.alignment = function (val) {
+	    if (arguments.length) {
+	      _alignment = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _alignment;
 	    }
-
-	    return _rules[k] && !_rules[k].enabled;
 	  };
 
-	  features.hidden = function (k) {
-	    if (!arguments.length) {
-	      return _keys.filter(function (k) {
-	        return _rules[k].hidden();
-	      });
+	  popover.scrollContainer = function (val) {
+	    if (arguments.length) {
+	      _scrollContainer = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _scrollContainer;
 	    }
-
-	    return _rules[k] && _rules[k].hidden();
 	  };
 
-	  features.autoHidden = function (k) {
-	    if (!arguments.length) {
-	      return _keys.filter(function (k) {
-	        return _rules[k].autoHidden();
-	      });
+	  popover.content = function (val) {
+	    if (arguments.length) {
+	      _content = val;
+	      return popover;
+	    } else {
+	      return _content;
 	    }
+	  };
 
-	    return _rules[k] && _rules[k].autoHidden();
+	  popover.isShown = function () {
+	    var popoverSelection = _anchorSelection.select('.popover-' + _id);
+
+	    return !popoverSelection.empty() && popoverSelection.classed('in');
 	  };
 
-	  features.enable = function (k) {
-	    if (_rules[k] && !_rules[k].enabled) {
-	      _rules[k].enable();
+	  popover.show = function () {
+	    _anchorSelection.each(show);
+	  };
 
-	      update();
-	    }
+	  popover.updateContent = function () {
+	    _anchorSelection.each(updateContent);
 	  };
 
-	  features.enableAll = function () {
-	    var didEnable = false;
+	  popover.hide = function () {
+	    _anchorSelection.each(hide);
+	  };
 
-	    for (var k in _rules) {
-	      if (!_rules[k].enabled) {
-	        didEnable = true;
+	  popover.toggle = function () {
+	    _anchorSelection.each(toggle);
+	  };
 
-	        _rules[k].enable();
-	      }
-	    }
+	  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();
+	  };
 
-	    if (didEnable) update();
+	  popover.destroyAny = function (selection) {
+	    selection.call(popover.destroy, '.popover');
 	  };
 
-	  features.disable = function (k) {
-	    if (_rules[k] && _rules[k].enabled) {
-	      _rules[k].disable();
+	  function setup() {
+	    var anchor = select(this);
 
-	      update();
+	    var animate = _animation.apply(this, arguments);
+
+	    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);
+
+	    if (animate) {
+	      popoverSelection.classed('fade', true);
 	    }
-	  };
 
-	  features.disableAll = function () {
-	    var didDisable = false;
+	    var display = _displayType.apply(this, arguments);
 
-	    for (var k in _rules) {
-	      if (_rules[k].enabled) {
-	        didDisable = true;
+	    if (display === 'hover') {
+	      var _lastNonMouseEnterTime;
 
-	        _rules[k].disable();
-	      }
+	      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
+
+	            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);
+	        });
+	      });
 	    }
+	  }
 
-	    if (didDisable) update();
-	  };
-
-	  features.toggle = function (k) {
-	    if (_rules[k]) {
-	      (function (f) {
-	        return f.enabled ? f.disable() : f.enable();
-	      })(_rules[k]);
-
-	      update();
-	    }
-	  };
+	  function show() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	  features.resetStats = function () {
-	    for (var i = 0; i < _keys.length; i++) {
-	      _rules[_keys[i]].count = 0;
+	    if (popoverSelection.empty()) {
+	      // popover was removed somehow, put it back
+	      anchor.call(popover.destroy);
+	      anchor.each(setup);
+	      popoverSelection = anchor.selectAll('.popover-' + _id);
 	    }
 
-	    dispatch$1.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;
-
-	    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..
-
-
-	    _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+	    popoverSelection.classed('in', true);
 
-	    for (i = 0; i < entities.length; i++) {
-	      geometry = entities[i].geometry(resolver);
-	      matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
+	    var displayType = _displayType.apply(this, arguments);
 
-	      for (j = 0; j < matches.length; j++) {
-	        _rules[matches[j]].count++;
-	      }
+	    if (displayType === 'clickFocus') {
+	      anchor.classed('active', true);
+	      popoverSelection.node().focus();
 	    }
 
-	    currHidden = features.hidden();
-
-	    if (currHidden !== _hidden) {
-	      _hidden = currHidden;
-	      needsRedraw = true;
-	      dispatch$1.call('change');
-	    }
+	    anchor.each(updateContent);
+	  }
 
-	    return needsRedraw;
-	  };
+	  function updateContent() {
+	    var anchor = select(this);
 
-	  features.stats = function () {
-	    for (var i = 0; i < _keys.length; i++) {
-	      _stats[_keys[i]] = _rules[_keys[i]].count;
+	    if (_content) {
+	      anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
 	    }
 
-	    return _stats;
-	  };
+	    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
 
-	  features.clear = function (d) {
-	    for (var i = 0; i < d.length; i++) {
-	      features.clearEntity(d[i]);
-	    }
-	  };
+	    updatePosition.apply(this, arguments);
+	    updatePosition.apply(this, arguments);
+	  }
 
-	  features.clearEntity = function (entity) {
-	    delete _cache[osmEntity.key(entity)];
-	  };
+	  function updatePosition() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	  features.reset = function () {
-	    Array.from(_deferred).forEach(function (handle) {
-	      window.cancelIdleCallback(handle);
+	    var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-	      _deferred["delete"](handle);
-	    });
-	    _cache = {};
-	  }; // only certain relations are worth checking
+	    var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+	    var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+	    var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
+	    var placement = _placement.apply(this, arguments);
 
-	  function relationShouldBeChecked(relation) {
-	    // multipolygon features have `area` geometry and aren't checked here
-	    return relation.tags.type === 'boundary';
-	  }
+	    popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-	  features.getMatches = function (entity, resolver, geometry) {
-	    if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
-	    var ent = osmEntity.key(entity);
+	    var alignment = _alignment.apply(this, arguments);
 
-	    if (!_cache[ent]) {
-	      _cache[ent] = {};
+	    var alignFactor = 0.5;
+
+	    if (alignment === 'leading') {
+	      alignFactor = 0;
+	    } else if (alignment === 'trailing') {
+	      alignFactor = 1;
 	    }
 
-	    if (!_cache[ent].matches) {
-	      var matches = {};
-	      var hasMatch = false;
+	    var anchorFrame = getFrame(anchor.node());
+	    var popoverFrame = getFrame(popoverSelection.node());
+	    var position;
 
-	      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,
+	    switch (placement) {
+	      case 'top':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y - popoverFrame.h
+	        };
+	        break;
 
-	          if (entity.type === 'way') {
-	            var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
+	      case 'bottom':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y + anchorFrame.h
+	        };
+	        break;
 
-	            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]);
+	      case 'left':
+	        position = {
+	          x: anchorFrame.x - popoverFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 
-	              if (_cache[pkey] && _cache[pkey].matches) {
-	                matches = Object.assign({}, _cache[pkey].matches); // shallow copy
+	      case 'right':
+	        position = {
+	          x: anchorFrame.x + anchorFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
+	    }
 
-	                continue;
-	              }
-	            }
-	          }
-	        }
+	    if (position) {
+	      if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	        var initialPosX = position.x;
 
-	        if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-	          matches[_keys[i]] = hasMatch = true;
+	        if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+	          position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+	        } else if (position.x < 10) {
+	          position.x = 10;
 	        }
-	      }
-
-	      _cache[ent].matches = matches;
-	    }
 
-	    return _cache[ent].matches;
-	  };
+	        var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
 
-	  features.getParents = function (entity, resolver, geometry) {
-	    if (geometry === 'point') return [];
-	    var ent = osmEntity.key(entity);
+	        var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+	        arrow.style('left', ~~arrowPosX + 'px');
+	      }
 
-	    if (!_cache[ent]) {
-	      _cache[ent] = {};
+	      popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+	    } else {
+	      popoverSelection.style('left', null).style('top', null);
 	    }
 
-	    if (!_cache[ent].parents) {
-	      var parents = [];
+	    function getFrame(node) {
+	      var positionStyle = select(node).style('position');
 
-	      if (geometry === 'vertex') {
-	        parents = resolver.parentWays(entity);
+	      if (positionStyle === 'absolute' || positionStyle === 'static') {
+	        return {
+	          x: node.offsetLeft - scrollLeft,
+	          y: node.offsetTop - scrollTop,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
 	      } else {
-	        // 'line', 'area', 'relation'
-	        parents = resolver.parentRelations(entity);
+	        return {
+	          x: 0,
+	          y: 0,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
 	      }
-
-	      _cache[ent].parents = parents;
 	    }
+	  }
 
-	    return _cache[ent].parents;
-	  };
+	  function hide() {
+	    var anchor = select(this);
 
-	  features.isHiddenPreset = function (preset, geometry) {
-	    if (!_hidden.length) return false;
-	    if (!preset.tags) return false;
-	    var test = preset.setTags({}, geometry);
+	    if (_displayType.apply(this, arguments) === 'clickFocus') {
+	      anchor.classed('active', false);
+	    }
 
-	    for (var key in _rules) {
-	      if (_rules[key].filter(test, geometry)) {
-	        if (_hidden.indexOf(key) !== -1) {
-	          return key;
-	        }
+	    anchor.selectAll('.popover-' + _id).classed('in', false);
+	  }
 
-	        return false;
-	      }
+	  function toggle() {
+	    if (select(this).select('.popover-' + _id).classed('in')) {
+	      hide.apply(this, arguments);
+	    } else {
+	      show.apply(this, arguments);
 	    }
+	  }
 
-	    return false;
-	  };
+	  return popover;
+	}
 
-	  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);
-	    });
-	  };
+	function uiTooltip(klass) {
+	  var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
-	  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;
+	  var _title = function _title() {
+	    var title = this.getAttribute('data-original-title');
 
-	    for (var i = 0; i < parents.length; i++) {
-	      if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-	        return false;
-	      }
+	    if (title) {
+	      return title;
+	    } else {
+	      title = this.getAttribute('title');
+	      this.removeAttribute('title');
+	      this.setAttribute('data-original-title', title);
 	    }
 
-	    return true;
+	    return title;
 	  };
 
-	  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..
+	  var _heading = utilFunctor(null);
 
+	  var _keys = utilFunctor(null);
 
-	    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));
-	    });
+	  tooltip.title = function (val) {
+	    if (!arguments.length) return _title;
+	    _title = utilFunctor(val);
+	    return tooltip;
 	  };
 
-	  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);
+	  tooltip.heading = function (val) {
+	    if (!arguments.length) return _heading;
+	    _heading = utilFunctor(val);
+	    return tooltip;
 	  };
 
-	  features.filter = function (d, resolver) {
-	    if (!_hidden.length) return d;
-	    var result = [];
+	  tooltip.keys = function (val) {
+	    if (!arguments.length) return _keys;
+	    _keys = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	    for (var i = 0; i < d.length; i++) {
-	      var entity = d[i];
+	  tooltip.content(function () {
+	    var heading = _heading.apply(this, arguments);
 
-	      if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-	        result.push(entity);
-	      }
-	    }
+	    var text = _title.apply(this, arguments);
 
-	    return result;
-	  };
+	    var keys = _keys.apply(this, arguments);
 
-	  features.forceVisible = function (entityIDs) {
-	    if (!arguments.length) return Object.keys(_forceVisible);
-	    _forceVisible = {};
+	    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').call(_t.append('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;
+	}
 
-	    for (var i = 0; i < entityIDs.length; i++) {
-	      _forceVisible[entityIDs[i]] = true;
-	      var entity = context.hasEntity(entityIDs[i]);
+	function uiEditMenu(context) {
+	  var dispatch = dispatch$8('toggled');
 
-	      if (entity && entity.type === 'relation') {
-	        // also show relation members (one level deep)
-	        for (var j in entity.members) {
-	          _forceVisible[entity.members[j].id] = true;
-	        }
-	      }
-	    }
+	  var _menu = select(null);
 
-	    return features;
-	  };
+	  var _operations = []; // the position the menu should be displayed relative to
 
-	  features.init = function () {
-	    var storage = corePreferences('disabled-features');
+	  var _anchorLoc = [0, 0];
+	  var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-	    if (storage) {
-	      var storageDisabled = storage.replace(/;/g, ',').split(',');
-	      storageDisabled.forEach(features.disable);
-	    }
+	  var _triggerType = '';
+	  var _vpTopMargin = 85; // viewport top margin
 
-	    var hash = utilStringQs(window.location.hash);
+	  var _vpBottomMargin = 45; // viewport bottom margin
 
-	    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
+	  var _vpSideMargin = 35; // viewport side margin
 
+	  var _menuTop = false;
 
-	  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 _menuHeight;
 
-	      var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+	  var _menuWidth; // hardcode these values to make menu positioning easier
 
-	      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;
-	}
+	  var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
-	//
-	// - 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
-	//
+	  var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-	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;
+	  var _menuSideMargin = 10;
+	  var _tooltips = [];
 
-	  for (i = 0; i < parents.length; i++) {
-	    nodes = parents[i].nodes;
-	    isClosed = parents[i].isClosed();
+	  var editMenu = function editMenu(selection) {
+	    var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-	    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;
+	    var ops = _operations.filter(function (op) {
+	      return !isTouchMenu || !op.mouseOnly;
+	    });
 
-	        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 (!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
 
-	        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
-	      }
-	    }
-	  }
+	    _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-	  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;
+	    var showLabels = isTouchMenu;
+	    var buttonHeight = showLabels ? 32 : 34;
 
-	    if (shouldReverse(entity)) {
-	      coordinates.reverse();
+	    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;
 	    }
 
-	    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];
+	    _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	    _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-	        if (a) {
-	          var span = geoVecLength(a, b) - offset;
+	    var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
-	          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];
+	    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]]);
 
-	            for (span -= dt; span >= 0; span -= dt) {
-	              p = geoVecAdd(p, [dx, dy]);
-	              coord.push(p);
-	            }
+	      _tooltips.push(tooltip);
 
-	            coord.push(b); // generate svg paths
+	      select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon(d.icon && d.icon() || '#iD-operation-' + d.id, 'operation'));
+	    });
 
-	            var segment = '';
-	            var j;
+	    if (showLabels) {
+	      buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+	        return d.title;
+	      });
+	    } // update
 
-	            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
-	            });
+	    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`
 
-	            if (bothDirections(entity)) {
-	              segment = '';
+	    function pointerup(d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }
 
-	              for (j = coord.length - 1; j >= 0; j--) {
-	                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	              }
+	    function click(d3_event, operation) {
+	      d3_event.stopPropagation();
 
-	              segments.push({
-	                id: entity.id,
-	                index: i++,
-	                d: segment
-	              });
-	            }
-	          }
+	      if (operation.relatedEntityIds) {
+	        utilHighlightEntities(operation.relatedEntityIds(), false, context);
+	      }
 
-	          offset = -span;
+	      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)();
+	        }
+	      } else {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
 	        }
 
-	        a = b;
+	        operation();
+	        editMenu.close();
 	      }
-	    })));
-	    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));
-	    }
-	  });
 
-	  var svgpath = function svgpath(entity) {
-	    if (entity.id in cache) {
-	      return cache[entity.id];
-	    } else {
-	      return cache[entity.id] = path(entity.asGeoJSON(graph));
+	      lastPointerUpType = null;
 	    }
+
+	    dispatch.call('toggled', this, true);
 	  };
 
-	  svgpath.geojson = function (d) {
-	    if (d.__featurehash__ !== undefined) {
-	      if (d.__featurehash__ in cache) {
-	        return cache[d.__featurehash__];
+	  function updatePosition() {
+	    if (!_menu || _menu.empty()) return;
+	    var anchorLoc = context.projection(_anchorLocLonLat);
+	    var viewport = context.surfaceRect();
+
+	    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;
+
+	    if (_menuTop) {
+	      if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
+	        // menu is near top viewport edge, shift downward
+	        offset[1] = -anchorLoc[1] + _vpTopMargin;
 	      } else {
-	        return cache[d.__featurehash__] = path(d);
+	        offset[1] = -_menuHeight;
 	      }
 	    } else {
-	      return path(d);
+	      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 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] + ')';
-	  };
+	    var origin = geoVecAdd(anchorLoc, offset);
 
-	  svgpoint.geojson = function (d) {
-	    return svgpoint(d.properties.entity);
-	  };
+	    _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-	  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;
+	    var tooltipSide = tooltipPosition(viewport, menuLeft);
 
-	      if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
-	        tags = Object.assign({}, relation.tags, tags);
-	      }
+	    _tooltips.forEach(function (tooltip) {
+	      tooltip.placement(tooltipSide);
 	    });
-	    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();
-	  }
 
-	  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
-	      };
+	    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
 
-	      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);
-	        }
-	      }
 
-	      start = end;
-	    }
+	        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
 
-	    return features;
 
-	    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 true;
+	      }
 	    }
 
-	    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]
+	    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';
 	        }
-	      });
-	    }
-	  }
-	}
-
-	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;
-	  };
+	        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
 
-	  var tagClasses = function tagClasses(selection) {
-	    selection.each(function tagClassesEach(entity) {
-	      var value = this.className;
 
-	      if (value.baseVal !== undefined) {
-	        value = value.baseVal;
-	      }
+	        return 'right';
+	      } else {
+	        // rtl
+	        if (!menuLeft) {
+	          return 'right';
+	        }
 
-	      var t = _tags(entity);
+	        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
 
-	      var computed = tagClasses.getClassesString(t, value);
 
-	      if (computed !== value) {
-	        select(this).attr('class', computed);
+	        return 'left';
 	      }
-	    });
-	  };
+	    }
+	  }
 
-	  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
+	  editMenu.close = function () {
+	    context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-	    var overrideGeometry;
+	    _menu.remove();
 
-	    if (/\bstroke\b/.test(value)) {
-	      if (!!t.barrier && t.barrier !== 'no') {
-	        overrideGeometry = 'line';
-	      }
-	    } // preserve base classes (nothing with `tag-`)
+	    _tooltips = [];
+	    dispatch.call('toggled', this, false);
+	  };
+
+	  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;
+	  };
 
-	    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..
+	  editMenu.operations = function (val) {
+	    if (!arguments.length) return _operations;
+	    _operations = val;
+	    return editMenu;
+	  };
 
-	    for (i = 0; i < primaries.length; i++) {
-	      k = primaries[i];
-	      v = t[k];
-	      if (!v || v === 'no') continue;
+	  return utilRebind(editMenu, dispatch, 'on');
+	}
 
-	      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';
+	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.html('inspector.title_count', {
+	          title: {
+	            html: _t.html('feature.' + k + '.description')
+	          },
+	          count: stats[k]
+	        });
 	      }
 
-	      primary = k;
+	      return null;
+	    }).filter(Boolean);
+	    selection.html('');
 
-	      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);
-	      }
+	    if (hiddenList.length) {
+	      var tooltipBehavior = uiTooltip().placement('top').title(function () {
+	        return hiddenList.join('<br/>');
+	      });
+	      selection.append('a').attr('class', 'chip').attr('href', '#').call(_t.append('feature_info.hidden_warning', {
+	        count: count
+	      })).call(tooltipBehavior).on('click', function (d3_event) {
+	        tooltipBehavior.hide();
+	        d3_event.preventDefault(); // open the Map Data pane
 
-	      break;
+	        context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+	      });
 	    }
 
-	    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`
+	    selection.classed('hide', !hiddenList.length);
+	  }
 
-	          v = t[k];
-	          if (!v || v === 'no') continue;
-	          status = statuses[i];
-	          break;
-	        }
-	      }
-	    } // add at most one status tag, only if relates to primary tag..
+	  return function (selection) {
+	    update(selection);
+	    context.features().on('change.feature_info', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
+	function uiFlash(context) {
+	  var _flashTimer;
 
-	    if (!status) {
-	      for (i = 0; i < statuses.length; i++) {
-	        k = statuses[i];
-	        v = t[k];
-	        if (!v || v === 'no') continue;
+	  var _duration = 2000;
+	  var _iconName = '#iD-icon-no';
+	  var _iconClass = 'disabled';
+	  var _label = '';
 
-	        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`
+	  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
 
-	        if (status) break;
-	      }
-	    }
+	    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
 
-	    if (status) {
-	      classes.push('tag-status');
-	      classes.push('tag-status-' + status);
-	    } // add any secondary tags
+	    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;
+	  };
 
-	    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..
+	  flash.label = function (_) {
+	    if (!arguments.length) return _label;
+	    _label = _;
+	    return flash;
+	  };
+
+	  flash.iconName = function (_) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = _;
+	    return flash;
+	  };
 
+	  flash.iconClass = function (_) {
+	    if (!arguments.length) return _iconClass;
+	    _iconClass = _;
+	    return flash;
+	  };
 
-	    if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
-	      var surface = t.highway === 'track' ? 'unpaved' : 'paved';
+	  return flash;
+	}
 
-	      for (k in t) {
-	        v = t[k];
+	function uiFullScreen(context) {
+	  var element = context.container().node(); // var button = d3_select(null);
 
-	        if (k in osmPavedTags) {
-	          surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-	        }
+	  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;
+	    }
+	  }
+
+	  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;
+	    }
+	  }
 
-	        if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-	          surface = 'semipaved';
-	        }
-	      }
+	  function isFullScreen() {
+	    return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+	  }
 
-	      classes.push('tag-' + surface);
-	    } // If this is a wikidata-tagged item, add a class for that..
+	  function isSupported() {
+	    return !!getFullScreenFn();
+	  }
 
+	  function fullScreen(d3_event) {
+	    d3_event.preventDefault();
 
-	    if (t.wikidata || t['brand:wikidata']) {
-	      classes.push('tag-wikidata');
+	    if (!isFullScreen()) {
+	      // button.classed('active', true);
+	      getFullScreenFn().apply(element);
+	    } else {
+	      // button.classed('active', false);
+	      getExitFullScreenFn().apply(document);
 	    }
+	  }
 
-	    return classes.join(' ').trim();
-	  };
+	  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');
 
-	  tagClasses.tags = function (val) {
-	    if (!arguments.length) return _tags;
-	    _tags = val;
-	    return tagClasses;
+	    var detected = utilDetect();
+	    var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+	    context.keybinding().on(keys, fullScreen);
 	  };
-
-	  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;
-	  }
+	function uiGeolocate(context) {
+	  var _geolocationOptions = {
+	    // prioritize speed and power usage over precision
+	    enableHighAccuracy: false,
+	    // don't hang indefinitely getting the location
+	    timeout: 6000 // 6sec
 
-	  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];
+	  var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-	      for (var value in values) {
-	        if (entityValue !== value) continue;
-	        var rules = values[value];
+	  var _layer = context.layers().layer('geolocate');
 
-	        if (typeof rules === 'string') {
-	          // short syntax - pattern name
-	          return 'pattern-' + rules;
-	        } // long syntax - rule array
+	  var _position;
 
+	  var _extent;
 
-	        for (var ruleKey in rules) {
-	          var rule = rules[ruleKey];
-	          var pass = true;
+	  var _timeoutID;
 
-	          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];
+	  var _button = select(null);
 
-	              if (!v || v !== rule[criterion]) {
-	                pass = false;
-	                break;
-	              }
-	            }
-	          }
+	  function click() {
+	    if (context.inIntro()) return;
 
-	          if (pass) {
-	            return 'pattern-' + rule.pattern;
-	          }
-	        }
-	      }
-	    }
-	  }
+	    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 null;
-	}
+	      navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+	    } else {
+	      _locating.close();
 
-	function svgAreas(projection, context) {
-	  function getPatternStyle(tags) {
-	    var imageID = svgTagPattern(tags);
+	      _layer.enabled(null, false);
 
-	    if (imageID) {
-	      return 'url("#ideditor-' + imageID + '")';
+	      updateButtonState();
 	    }
-
-	    return '';
 	  }
 
-	  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
+	  function zoomTo() {
+	    context.enter(modeBrowse(context));
+	    var map = context.map();
 
-	    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
+	    _layer.enabled(_position, true);
 
-	    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
+	    updateButtonState();
+	    map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	  }
 
-	    targets.exit().remove();
+	  function success(geolocation) {
+	    _position = geolocation;
+	    var coords = _position.coords;
+	    _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+	    zoomTo();
+	    finish();
+	  }
 
-	    var segmentWasEdited = function segmentWasEdited(d) {
-	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+	  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 (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	        return false;
-	      }
+	    finish();
+	  }
 
-	      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
+	  function finish() {
+	    _locating.close(); // unblock ui
 
 
-	    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 (_timeoutID) {
+	      clearTimeout(_timeoutID);
+	    }
 
-	    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
+	    _timeoutID = undefined;
+	  }
 
-	    nopes.exit().remove(); // enter/update
+	  function updateButtonState() {
+	    _button.classed('active', _layer.enabled());
 
-	    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);
+	    _button.attr('aria-pressed', _layer.enabled());
 	  }
 
-	  function drawAreas(selection, graph, entities, filter) {
-	    var path = svgPath(projection, graph, true);
-	    var areas = {};
-	    var multipolygon;
-	    var base = context.history().base();
+	  return function (selection) {
+	    if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+	    _button = selection.append('button').on('click', click).attr('aria-pressed', false).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);
+	  };
+	}
 
-	    for (var i = 0; i < entities.length; i++) {
-	      var entity = entities[i];
-	      if (entity.geometry(graph) !== 'area') continue;
-	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+	function uiPanelBackground(context) {
+	  var background = context.background();
+	  var _currSourceName = null;
+	  var _metadata = {};
+	  var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-	      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))
-	        };
-	      }
+	  var debouncedRedraw = debounce(redraw, 250);
+
+	  function redraw(selection) {
+	    var source = background.baseLayerSource();
+	    if (!source) return;
+	    var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+	    var sourceLabel = source.label();
+
+	    if (_currSourceName !== sourceLabel) {
+	      _currSourceName = sourceLabel;
+	      _metadata = {};
 	    }
 
-	    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';
+	    selection.html('');
+	    var list = selection.append('ul').attr('class', 'background-info');
+	    list.append('li').html(_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]).call(_t.append('info_panels.background.' + k, {
+	        suffix: ':'
+	      })).append('span').attr('class', 'background-info-span-' + k).text(_metadata[k]);
 	    });
-	    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';
+
+	    debouncedGetMetadata(selection);
+	    var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	    selection.append('a').call(_t.append('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);
 	    });
-	    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;
+	    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').call(_t.append('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
 
-	    function sortedByArea(entity) {
-	      if (this._parent.__data__ === 'fill') {
-	        return fillpaths[bisect(fillpaths, -entity.area(graph))];
-	      }
-	    }
 
-	    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);
+	    ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+	      if (source.id !== layerId) {
+	        var key = layerId + '-vintage';
+	        var sourceVintage = context.background().findSource(key);
 
-	      if (layer === 'fill') {
-	        this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-	        this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+	        if (context.background().showsLayer(sourceVintage)) {
+	          context.background().toggleOverlayLayer(sourceVintage);
+	        }
 	      }
-	    }).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;
-	}
+	  var debouncedGetMetadata = debounce(getMetadata, 250);
+
+	  function getMetadata(selection) {
+	    var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
+
+	    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
+
+	    _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
 
-	//[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
+	      _metadataKeys.forEach(function (k) {
+	        if (k === 'zoom' || k === 'vintage') return; // done already
 
-	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 val = result[k];
+	        _metadata[k] = val;
+	        selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).text(val);
+	      });
+	    });
+	  }
 
-	var S_TAG = 0; //tag name offerring
+	  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);
+	    });
+	  };
 
-	var S_ATTR = 1; //attr name offerring 
+	  panel.off = function () {
+	    context.map().on('drawn.info-background', null).on('move.info-background', null);
+	  };
 
-	var S_ATTR_SPACE = 2; //attr name end and space offer
+	  panel.id = 'background';
+	  panel.label = _t.html('info_panels.background.title');
+	  panel.key = _t('info_panels.background.key');
+	  return panel;
+	}
 
-	var S_EQ = 3; //=space?
+	function uiPanelHistory(context) {
+	  var osm;
 
-	var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
+	  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);
+	  }
 
-	var S_ATTR_END = 5; //attr value end and no space(quot end)
+	  function displayUser(selection, userName) {
+	    if (!userName) {
+	      selection.append('span').call(_t.append('info_panels.history.unknown'));
+	      return;
+	    }
 
-	var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)
+	    selection.append('span').attr('class', 'user-name').text(userName);
+	    var links = selection.append('div').attr('class', 'links');
 
-	var S_TAG_CLOSE = 7; //closed el<el />
+	    if (osm) {
+	      links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').call(_t.append('info_panels.history.profile_link'));
+	    }
 
-	function XMLReader() {}
+	    links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).text('HDYC');
+	  }
 
-	XMLReader.prototype = {
-	  parse: function parse(source, defaultNSMap, entityMap) {
-	    var domBuilder = this.domBuilder;
-	    domBuilder.startDocument();
+	  function displayChangeset(selection, changeset) {
+	    if (!changeset) {
+	      selection.append('span').call(_t.append('info_panels.history.unknown'));
+	      return;
+	    }
 
-	    _copy(defaultNSMap, defaultNSMap = {});
+	    selection.append('span').attr('class', 'changeset-id').text(changeset);
+	    var links = selection.append('div').attr('class', 'links');
 
-	    _parse(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
+	    if (osm) {
+	      links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').call(_t.append('info_panels.history.changeset_link'));
+	    }
 
-	    domBuilder.endDocument();
+	    links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').text('OSMCha');
+	    links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').text('Achavi');
 	  }
-	};
 
-	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);
+	  function redraw(selection) {
+	    var selectedNoteID = context.selectedNoteID();
+	    osm = context.connection();
+	    var selected, note, entity;
+
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      selected = [_t.html('note.note') + ' ' + selectedNoteID];
+	      note = osm.getNote(selectedNoteID);
 	    } else {
-	      return String.fromCharCode(code);
+	      // selected 1..n entities
+	      selected = context.selectedIDs().filter(function (e) {
+	        return context.hasEntity(e);
+	      });
+
+	      if (selected.length) {
+	        entity = context.entity(selected[0]);
+	      }
 	    }
-	  }
 
-	  function entityReplacer(a) {
-	    var k = a.slice(1, -1);
+	    var singular = selected.length === 1 ? selected[0] : null;
+	    selection.html('');
 
-	    if (k in entityMap) {
-	      return entityMap[k];
-	    } else if (k.charAt(0) === '#') {
-	      return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));
+	    if (singular) {
+	      selection.append('h4').attr('class', 'history-heading').html(singular);
 	    } else {
-	      errorHandler.error('entity not found:' + a);
-	      return a;
+	      selection.append('h4').attr('class', 'history-heading').call(_t.append('info_panels.selected', {
+	        n: selected.length
+	      }));
 	    }
-	  }
 
-	  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;
-	    }
-	  }
+	    if (!singular) return;
 
-	  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)
+	    if (entity) {
+	      selection.call(redrawEntity, entity);
+	    } else if (note) {
+	      selection.call(redrawNote, note);
 	    }
-
-	    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);
-	      }
+	  function redrawNote(selection, note) {
+	    if (!note || note.isNew()) {
+	      selection.append('div').call(_t.append('info_panels.history.note_no_history'));
+	      return;
+	    }
 
-	      switch (source.charAt(tagStart + 1)) {
-	        case '/':
-	          var end = source.indexOf('>', tagStart + 3);
-	          var tagName = source.substring(tagStart + 2, end);
-	          var config = parseStack.pop();
+	    var list = selection.append('ul');
+	    list.append('li').call(_t.append('info_panels.history.note_comments', {
+	      suffix: ':'
+	    })).append('span').text(note.comments.length);
 
-	          if (end < 0) {
-	            tagName = source.substring(tagStart + 2).replace(/[\s<].*/, ''); //console.error('#@@@@@@'+tagName)
+	    if (note.comments.length) {
+	      list.append('li').call(_t.append('info_panels.history.note_created_date', {
+	        suffix: ':'
+	      })).append('span').text(displayTimestamp(note.comments[0].date));
+	      list.append('li').call(_t.append('info_panels.history.note_created_user', {
+	        suffix: ':'
+	      })).call(displayUser, note.comments[0].user);
+	    }
 
-	            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);
+	    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').call(_t.append('info_panels.history.note_link_text'));
+	    }
+	  }
 
+	  function redrawEntity(selection, entity) {
+	    if (!entity || entity.isNew()) {
+	      selection.append('div').call(_t.append('info_panels.history.no_history'));
+	      return;
+	    }
 
-	          var localNSMap = config.localNSMap;
-	          var endMatch = config.tagName == tagName;
-	          var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();
+	    var links = selection.append('div').attr('class', 'links');
 
-	          if (endIgnoreCaseMach) {
-	            domBuilder.endElement(config.uri, config.localName, tagName);
+	    if (osm) {
+	      links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').call(_t.append('info_panels.history.history_link'));
+	    }
 
-	            if (localNSMap) {
-	              for (var prefix in localNSMap) {
-	                domBuilder.endPrefixMapping(prefix);
-	              }
-	            }
+	    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').call(_t.append('info_panels.history.version', {
+	      suffix: ':'
+	    })).append('span').text(entity.version);
+	    list.append('li').call(_t.append('info_panels.history.last_edit', {
+	      suffix: ':'
+	    })).append('span').text(displayTimestamp(entity.timestamp));
+	    list.append('li').call(_t.append('info_panels.history.edited_by', {
+	      suffix: ':'
+	    })).call(displayUser, entity.user);
+	    list.append('li').call(_t.append('info_panels.history.changeset', {
+	      suffix: ':'
+	    })).call(displayChangeset, entity.changeset);
+	  }
 
-	            if (!endMatch) {
-	              errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName);
-	            }
-	          } else {
-	            parseStack.push(config);
-	          }
+	  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);
+	    });
+	  };
 
-	          end++;
-	          break;
-	        // end elment
+	  panel.off = function () {
+	    context.map().on('drawn.info-history', null);
+	    context.on('enter.info-history', null);
+	  };
 
-	        case '?':
-	          // <?...?>
-	          locator && position(tagStart);
-	          end = parseInstruction(source, tagStart, domBuilder);
-	          break;
+	  panel.id = 'history';
+	  panel.label = _t.html('info_panels.history.title');
+	  panel.key = _t('info_panels.history.key');
+	  return panel;
+	}
 
-	        case '!':
-	          // <!doctype,<![CDATA,<!--
-	          locator && position(tagStart);
-	          end = parseDCC(source, tagStart, domBuilder, errorHandler);
-	          break;
+	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
+	 */
 
-	        default:
-	          locator && position(tagStart);
-	          var el = new ElementAttributes();
-	          var currentNSMap = parseStack[parseStack.length - 1].currentNSMap; //elStartEnd
+	function displayLength(m, isImperial) {
+	  var d = m * (isImperial ? 3.28084 : 1);
+	  var unit;
 
-	          var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
-	          var len = el.length;
+	  if (isImperial) {
+	    if (d >= 5280) {
+	      d /= 5280;
+	      unit = 'miles';
+	    } else {
+	      unit = 'feet';
+	    }
+	  } else {
+	    if (d >= 1000) {
+	      d /= 1000;
+	      unit = 'kilometers';
+	    } else {
+	      unit = 'meters';
+	    }
+	  }
 
-	          if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
-	            el.closed = true;
+	  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
+	 */
 
-	            if (!entityMap.nbsp) {
-	              errorHandler.warning('unclosed xml attribute');
-	            }
-	          }
+	function displayArea(m2, isImperial) {
+	  var locale = _mainLocalizer.localeCode();
+	  var d = m2 * (isImperial ? 10.7639111056 : 1);
+	  var d1, d2, area;
+	  var unit1 = '';
+	  var unit2 = '';
 
-	          if (locator && len) {
-	            var locator2 = copyLocator(locator, {}); //try{//attribute position fixed
+	  if (isImperial) {
+	    if (d >= 6969600) {
+	      // > 0.25mi² show mi²
+	      d1 = d / 27878400;
+	      unit1 = 'square_miles';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_feet';
+	    }
 
-	            for (var i = 0; i < len; i++) {
-	              var a = el[i];
-	              position(a.offset);
-	              a.locator = copyLocator(locator, {});
-	            } //}catch(e){console.error('@@@@@'+e)}
+	    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';
+	    }
+	  }
 
-	            domBuilder.locator = locator2;
+	  area = _t('units.' + unit1, {
+	    quantity: d1.toLocaleString(locale, {
+	      maximumSignificantDigits: 4
+	    })
+	  });
 
-	            if (appendElement(el, domBuilder, currentNSMap)) {
-	              parseStack.push(el);
-	            }
+	  if (d2) {
+	    return _t('units.area_pair', {
+	      area1: area,
+	      area2: _t('units.' + unit2, {
+	        quantity: d2.toLocaleString(locale, {
+	          maximumSignificantDigits: 2
+	        })
+	      })
+	    });
+	  } else {
+	    return area;
+	  }
+	}
 
-	            domBuilder.locator = locator;
-	          } else {
-	            if (appendElement(el, domBuilder, currentNSMap)) {
-	              parseStack.push(el);
-	            }
-	          }
+	function wrap(x, min, max) {
+	  var d = max - min;
+	  return ((x - min) % d + d) % d + min;
+	}
 
-	          if (el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed) {
-	            end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);
-	          } else {
-	            end++;
-	          }
+	function clamp(x, min, max) {
+	  return Math.max(min, Math.min(x, max));
+	}
 
-	      }
-	    } catch (e) {
-	      errorHandler.error('element parse error: ' + e); //errorHandler.error('element parse error: '+e);
+	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;
 
-	      end = -1; //throw e;
-	    }
+	  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 (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);
-	    }
+	  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 copyLocator(f, t) {
-	  t.lineNumber = f.lineNumber;
-	  t.columnNumber = f.columnNumber;
-	  return t;
+
+	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')
+	  });
 	}
 	/**
-	 * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-	 * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
+	 * 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(coord[1], -90, 90).toFixed(OSM_PRECISION),
+	    longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+	  });
+	}
 
-	function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {
-	  var attrName;
-	  var value;
-	  var p = ++start;
-	  var s = S_TAG; //status
+	function uiPanelLocation(context) {
+	  var currLocation = '';
 
-	  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');
-	        }
+	  function redraw(selection) {
+	    selection.html('');
+	    var list = selection.append('ul'); // Mouse coordinates
 
-	        break;
+	    var coord = context.map().mouseCoordinates();
 
-	      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);
-	            }
+	    if (coord.some(isNaN)) {
+	      coord = context.map().center();
+	    }
 
-	            start = p + 1;
-	            p = source.indexOf(c, start);
+	    list.append('li').text(dmsCoordinatePair(coord)).append('li').text(decimalCoordinatePair(coord)); // Location Info
 
-	            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)
+	    selection.append('div').attr('class', 'location-info').text(currLocation || ' ');
+	    debouncedGetLocation(selection, coord);
+	  }
 
-	          el.add(attrName, value, start); //console.dir(el)
+	  var debouncedGetLocation = debounce(getLocation, 250);
 
-	          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 "="');
-	        }
+	  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);
+	      });
+	    }
+	  }
 
-	        break;
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	      case '/':
-	        switch (s) {
-	          case S_TAG:
-	            el.setTagName(source.slice(start, p));
+	  panel.off = function () {
+	    context.surface().on('.info-location', null);
+	  };
 
-	          case S_ATTR_END:
-	          case S_TAG_SPACE:
-	          case S_TAG_CLOSE:
-	            s = S_TAG_CLOSE;
-	            el.closed = true;
+	  panel.id = 'location';
+	  panel.label = _t.html('info_panels.location.title');
+	  panel.key = _t('info_panels.location.key');
+	  return panel;
+	}
 
-	          case S_ATTR_NOQUOT_VALUE:
-	          case S_ATTR:
-	          case S_ATTR_SPACE:
-	            break;
-	          //case S_EQ:
+	function uiPanelMeasurement(context) {
+	  function radiansToMeters(r) {
+	    // using WGS84 authalic radius (6371007.1809 m)
+	    return r * 6371007.1809;
+	  }
 
-	          default:
-	            throw new Error("attribute invalid close char('/')");
-	        }
+	  function steradiansToSqmeters(r) {
+	    // http://gis.stackexchange.com/a/124857/40446
+	    return r / (4 * Math.PI) * 510065621724000;
+	  }
 
-	        break;
+	  function toLineString(feature) {
+	    if (feature.type === 'LineString') return feature;
+	    var result = {
+	      type: 'LineString',
+	      coordinates: []
+	    };
 
-	      case '':
-	        //end document
-	        //throw new Error('unexpected end of input')
-	        errorHandler.error('unexpected end of input');
+	    if (feature.type === 'Polygon') {
+	      result.coordinates = feature.coordinates[0];
+	    } else if (feature.type === 'MultiPolygon') {
+	      result.coordinates = feature.coordinates[0][0];
+	    }
 
-	        if (s == S_TAG) {
-	          el.setTagName(source.slice(start, p));
-	        }
+	    return result;
+	  }
 
-	        return p;
+	  var _isImperial = !_mainLocalizer.usesMetric();
 
-	      case '>':
-	        switch (s) {
-	          case S_TAG:
-	            el.setTagName(source.slice(start, p));
+	  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;
 
-	          case S_ATTR_END:
-	          case S_TAG_SPACE:
-	          case S_TAG_CLOSE:
-	            break;
-	          //normal
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      var note = osm.getNote(selectedNoteID);
+	      heading = _t.html('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.html('info_panels.selected', {
+	        n: selected.length
+	      });
 
-	          case S_ATTR_NOQUOT_VALUE: //Compatible state
+	      if (selected.length) {
+	        var extent = geoExtent();
 
-	          case S_ATTR:
-	            value = source.slice(start, p);
+	        for (var i in selected) {
+	          var entity = selected[i];
 
-	            if (value.slice(-1) === '/') {
-	              el.closed = true;
-	              value = value.slice(0, -1);
-	            }
+	          extent._extend(entity.extent(graph));
 
-	          case S_ATTR_SPACE:
-	            if (s === S_ATTR_SPACE) {
-	              value = attrName;
-	            }
+	          geometry = entity.geometry(graph);
 
-	            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!!');
-	              }
+	          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);
 
-	              el.add(value, value, start);
+	            if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+	              centroid = entity.extent(graph).center();
 	            }
 
-	            break;
-
-	          case S_EQ:
-	            throw new Error('attribute value missed!!');
-	        } //			console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
-
+	            if (closed) {
+	              area += steradiansToSqmeters(entity.area(graph));
+	            }
+	          }
+	        }
 
-	        return p;
+	        if (selected.length > 1) {
+	          geometry = null;
+	          closed = null;
+	          centroid = null;
+	        }
 
-	      /*xml space '\x20' | #x9 | #xD | #xA; */
+	        if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+	          distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+	        }
 
-	      case "\x80":
-	        c = ' ';
+	        if (selected.length === 1 && selected[0].type === 'node') {
+	          location = selected[0].loc;
+	        } else {
+	          totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+	        }
 
-	      default:
-	        if (c <= ' ') {
-	          //space
-	          switch (s) {
-	            case S_TAG:
-	              el.setTagName(source.slice(start, p)); //tagName
+	        if (!location && !centroid) {
+	          center = extent.center();
+	        }
+	      }
+	    }
 
-	              s = S_TAG_SPACE;
-	              break;
+	    selection.html('');
 
-	            case S_ATTR:
-	              attrName = source.slice(start, p);
-	              s = S_ATTR_SPACE;
-	              break;
+	    if (heading) {
+	      selection.append('h4').attr('class', 'measurement-heading').html(heading);
+	    }
 
-	            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);
+	    var list = selection.append('ul');
+	    var coordItem;
 
-	            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!!');
-	              }
+	    if (geometry) {
+	      list.append('li').call(_t.append('info_panels.measurement.geometry', {
+	        suffix: ':'
+	      })).append('span').html(closed ? _t.html('info_panels.measurement.closed_' + geometry) : _t.html('geometry.' + geometry));
+	    }
 
-	              el.add(attrName, attrName, start);
-	              start = p;
-	              s = S_ATTR;
-	              break;
+	    if (totalNodeCount) {
+	      list.append('li').call(_t.append('info_panels.measurement.node_count', {
+	        suffix: ':'
+	      })).append('span').text(totalNodeCount.toLocaleString(localeCode));
+	    }
 
-	            case S_ATTR_END:
-	              errorHandler.warning('attribute space is required"' + attrName + '"!!');
+	    if (area) {
+	      list.append('li').call(_t.append('info_panels.measurement.area', {
+	        suffix: ':'
+	      })).append('span').text(displayArea(area, _isImperial));
+	    }
 
-	            case S_TAG_SPACE:
-	              s = S_ATTR;
-	              start = p;
-	              break;
+	    if (length) {
+	      list.append('li').call(_t.append('info_panels.measurement.' + (closed ? 'perimeter' : 'length'), {
+	        suffix: ':'
+	      })).append('span').text(displayLength(length, _isImperial));
+	    }
 
-	            case S_EQ:
-	              s = S_ATTR_NOQUOT_VALUE;
-	              start = p;
-	              break;
+	    if (typeof distance === 'number') {
+	      list.append('li').call(_t.append('info_panels.measurement.distance', {
+	        suffix: ':'
+	      })).append('span').text(displayLength(distance, _isImperial));
+	    }
 
-	            case S_TAG_CLOSE:
-	              throw new Error("elements closed character '/' and '>' must be connected to");
-	          }
-	        }
+	    if (location) {
+	      coordItem = list.append('li').call(_t.append('info_panels.measurement.location', {
+	        suffix: ':'
+	      }));
+	      coordItem.append('span').text(dmsCoordinatePair(location));
+	      coordItem.append('span').text(decimalCoordinatePair(location));
+	    }
 
-	    } //end outer switch
-	    //console.log('p++',p)
+	    if (centroid) {
+	      coordItem = list.append('li').call(_t.append('info_panels.measurement.centroid', {
+	        suffix: ':'
+	      }));
+	      coordItem.append('span').text(dmsCoordinatePair(centroid));
+	      coordItem.append('span').text(decimalCoordinatePair(centroid));
+	    }
 
+	    if (center) {
+	      coordItem = list.append('li').call(_t.append('info_panels.measurement.center', {
+	        suffix: ':'
+	      }));
+	      coordItem.append('span').text(dmsCoordinatePair(center));
+	      coordItem.append('span').text(decimalCoordinatePair(center));
+	    }
 
-	    p++;
+	    if (length || area || typeof distance === 'number') {
+	      var toggle = _isImperial ? 'imperial' : 'metric';
+	      selection.append('a').call(_t.append('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);
+	      });
+	    }
 	  }
-	}
-	/**
-	 * @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;
+	  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);
+	    });
+	  };
 
-	  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 !== ''
+	  panel.off = function () {
+	    context.map().on('drawn.info-measurement', null);
+	    context.on('enter.info-measurement', null);
+	  };
 
+	  panel.id = 'measurement';
+	  panel.label = _t.html('info_panels.measurement.title');
+	  panel.key = _t('info_panels.measurement.key');
+	  return panel;
+	}
 
-	    a.localName = localName; //prefix == null for no ns prefix attribute 
+	var uiInfoPanels = {
+	  background: uiPanelBackground,
+	  history: uiPanelHistory,
+	  location: uiPanelLocation,
+	  measurement: uiPanelMeasurement
+	};
 
-	    if (nsPrefix !== false) {
-	      //hack!!
-	      if (localNSMap == null) {
-	        localNSMap = {}; //console.log(currentNSMap,0)
+	function uiInfo(context) {
+	  var ids = Object.keys(uiInfoPanels);
+	  var wasActive = ['measurement'];
+	  var panels = {};
+	  var active = {}; // create panels
 
-	        _copy(currentNSMap, currentNSMap = {}); //console.log(currentNSMap,1)
+	  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').attr('title', _t('icons.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
 
-	      currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-	      a.uri = 'http://www.w3.org/2000/xmlns/';
-	      domBuilder.startPrefixMapping(nsPrefix, value);
+	      infoPanels.selectAll('.panel-content').each(function (d) {
+	        select(this).call(panels[d]);
+	      });
 	    }
-	  }
 
-	  var i = el.length;
+	    info.toggle = function (which) {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      });
 
-	  while (i--) {
-	    a = el[i];
-	    var prefix = a.prefix;
+	      if (which) {
+	        // toggle one
+	        active[which] = !active[which];
 
-	    if (prefix) {
-	      //no prefix attribute has no namespace
-	      if (prefix === 'xml') {
-	        a.uri = 'http://www.w3.org/XML/1998/namespace';
-	      }
+	        if (activeids.length === 1 && activeids[0] === which) {
+	          // none active anymore
+	          wasActive = [which];
+	        }
 
-	      if (prefix !== 'xmlns') {
-	        a.uri = currentNSMap[prefix || '']; //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
+	        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;
+	          });
+	        }
 	      }
-	    }
+
+	      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);
+	      });
+	    });
 	  }
 
-	  var nsp = tagName.indexOf(':');
+	  return info;
+	}
+
+	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;
 
-	  if (nsp > 0) {
-	    prefix = el.prefix = tagName.slice(0, nsp);
-	    localName = el.localName = tagName.slice(nsp + 1);
+	  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 {
-	    prefix = null; //important!!
+	    box = locOrBox;
+	  }
 
-	    localName = el.localName = tagName;
-	  } //no prefix element has default namespace
+	  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 ns = el.uri = currentNSMap[prefix || ''];
-	  domBuilder.startElement(ns, localName, tagName, el); //endPrefixMapping and startPrefixMapping have not any help for dom builder
-	  //localNSMap = null
+	    for (var key in helpStringReplacements) {
+	      helpStringReplacements[key] = {
+	        html: helpStringReplacements[key]
+	      };
+	    }
+	  }
 
-	  if (el.closed) {
-	    domBuilder.endElement(ns, localName, tagName);
+	  var reps;
 
-	    if (localNSMap) {
-	      for (prefix in localNSMap) {
-	        domBuilder.endPrefixMapping(prefix);
-	      }
-	    }
+	  if (replacements) {
+	    reps = Object.assign(replacements, helpStringReplacements);
 	  } else {
-	    el.currentNSMap = currentNSMap;
-	    el.localNSMap = localNSMap; //parseStack.push(el);
-
-	    return true;
+	    reps = helpStringReplacements;
 	  }
+
+	  return _t.html(id, reps) // use keyboard key styling for shortcuts
+	  .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
 	}
 
-	function parseHtmlSpecialContent(source, elStartEnd, tagName, entityReplacer, domBuilder) {
-	  if (/^(?:script|textarea)$/i.test(tagName)) {
-	    var elEndStart = source.indexOf('</' + tagName + '>', elStartEnd);
-	    var text = source.substring(elStartEnd + 1, elEndStart);
+	function slugify(text) {
+	  return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
+	  .replace(/[^\w\-]+/g, '') // Remove all non-word chars
+	  .replace(/\-\-+/g, '-') // Replace multiple - with single -
+	  .replace(/^-+/, '') // Trim - from start of text
+	  .replace(/-+$/, ''); // Trim - from end of text
+	} // console warning for missing walkthrough names
 
-	    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
+	var missingStrings = {};
 
+	function checkKey(key, text) {
+	  if (_t(key, {
+	    "default": undefined
+	  }) === undefined) {
+	    if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-	      text = text.replace(/&#?\w+;/g, entityReplacer);
-	      domBuilder.characters(text, 0, text.length);
-	      return elEndStart; //}
-	    }
+	    missingStrings[key] = text;
+	    var missing = key + ': ' + text;
+	    if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
 	  }
-
-	  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 + '>');
+	function localize(obj) {
+	  var key; // Assign name if entity has one..
 
-	    if (pos < elStartEnd) {
-	      //忘记闭合
-	      pos = source.lastIndexOf('</' + tagName);
-	    }
+	  var name = obj.tags && obj.tags.name;
 
-	    closeMap[tagName] = pos;
-	  }
+	  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..
 
-	  return pos < elStartEnd; //} 
-	}
 
-	function _copy(source, target) {
-	  for (var n in source) {
-	    target[n] = source[n];
-	  }
-	}
+	  var street = obj.tags && obj.tags['addr:street'];
 
-	function parseDCC(source, start, domBuilder, errorHandler) {
-	  //sure start with '<!'
-	  var next = source.charAt(start + 2);
+	  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..
 
-	  switch (next) {
-	    case '-':
-	      if (source.charAt(start + 3) === '-') {
-	        var end = source.indexOf('-->', start + 4); //append comment source.substring(4,end)//<!--
+	    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 (end > start) {
-	          domBuilder.comment(source, start + 4, end - start - 4);
-	          return end + 3;
+	      if (str) {
+	        if (str.match(/^<.*>$/) !== null) {
+	          delete obj.tags[tag];
 	        } else {
-	          errorHandler.error("Unclosed comment");
-	          return -1;
+	          obj.tags[tag] = str;
 	        }
-	      } 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$1(source, start);
-	      var len = matchs.length;
-
-	      if (len > 1 && /!doctype/i.test(matchs[0][0])) {
-	        var name = matchs[1][0];
-	        var pubid = len > 3 && /^public$/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 obj;
+	} // 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
 
-	  return -1;
-	}
+	  var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-	function parseInstruction(source, start, domBuilder) {
-	  var end = source.indexOf('?>', start);
+	  var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-	  if (end) {
-	    var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
+	  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);
 
-	    if (match) {
-	      var len = match[0].length;
-	      domBuilder.processingInstruction(match[1], match[2]);
-	      return end + 2;
-	    } else {
-	      //error
-	      return -1;
+	    if (mag > lowerBound && mag < upperBound) {
+	      return false;
 	    }
 	  }
 
-	  return -1;
+	  return true;
 	}
-	/**
-	 * @param source
-	 */
-
-
-	function ElementAttributes(source) {}
-
-	ElementAttributes.prototype = {
-	  setTagName: function setTagName(tagName) {
-	    if (!tagNamePattern.test(tagName)) {
-	      throw new Error('invalid tagName:' + tagName);
-	    }
-
-	    this.tagName = tagName;
-	  },
-	  add: function add(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 getLocalName(i) {
-	    return this[i].localName;
-	  },
-	  getLocator: function getLocator(i) {
-	    return this[i].locator;
-	  },
-	  getQName: function getQName(i) {
-	    return this[i].qName;
-	  },
-	  getURI: function getURI(i) {
-	    return this[i].uri;
-	  },
-	  getValue: function getValue(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 _set_proto_(thiz, parent) {
-	  thiz.__proto__ = parent;
-	  return thiz;
+	function selectMenuItem(context, operation) {
+	  return context.container().select('.edit-menu .edit-menu-item-' + operation);
 	}
+	function transitionTime(point1, point2) {
+	  var distance = geoSphericalDistance(point1, point2);
 
-	if (!(_set_proto_({}, _set_proto_.prototype) instanceof _set_proto_)) {
-	  _set_proto_ = function _set_proto_(thiz, parent) {
-	    function p() {}
-	    p.prototype = parent;
-	    p = new p();
+	  if (distance === 0) {
+	    return 0;
+	  } else if (distance < 80) {
+	    return 500;
+	  } else {
+	    return 1000;
+	  }
+	}
 
-	    for (parent in thiz) {
-	      p[parent] = thiz[parent];
-	    }
+	// 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.
 
-	    return p;
+	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);
+	    });
 	  };
 	}
 
-	function split$1(source, start) {
-	  var match;
-	  var buf = [];
-	  var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-	  reg.lastIndex = start;
-	  reg.exec(source); //skip <
+	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);
+	    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();
 
-	  while (match = reg.exec(source)) {
-	    buf.push(match);
-	    if (match[1]) return buf;
+	    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
+	   */
 
-	var XMLReader_1 = XMLReader;
-	var sax = {
-	  XMLReader: XMLReader_1
-	};
 
-	/*
-	 * 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
-	 */
-	function copy$1(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]));?
-	 */
+	  curtain.reveal = function (box, html, options) {
+	    options = options || {};
 
+	    if (typeof box === 'string') {
+	      box = select(box).node();
+	    }
 
-	function _extends(Class, Super) {
-	  var pt = Class.prototype;
+	    if (box && box.getBoundingClientRect) {
+	      box = copyBox(box.getBoundingClientRect());
+	      var containerRect = containerNode.getBoundingClientRect();
+	      box.top -= containerRect.top;
+	      box.left -= containerRect.left;
+	    }
 
-	  if (Object.create) {
-	    var ppt = Object.create(Super.prototype);
-	    pt.__proto__ = ppt;
-	  }
-
-	  if (!(pt instanceof Super)) {
-	    var t = function t() {};
-	    t.prototype = Super.prototype;
-	    t = new t();
-	    copy$1(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);
-	  }
+	    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;
+	    }
 
-	  error.code = code;
-	  if (message) this.message = this.message + ": " + message;
-	  return error;
-	}
-	DOMException$2.prototype = Error.prototype;
-	copy$1(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.
-	 */
+	    var tooltipBox;
 
-	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,
+	    if (options.tooltipBox) {
+	      tooltipBox = options.tooltipBox;
 
-	  /**
-	   * 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 item(index) {
-	    return this[index] || null;
-	  },
-	  toString: function toString(isHTML, nodeFilter) {
-	    for (var buf = [], i = 0; i < this.length; i++) {
-	      serializeToString(this[i], buf, isHTML, nodeFilter);
+	      if (typeof tooltipBox === 'string') {
+	        tooltipBox = select(tooltipBox).node();
+	      }
+
+	      if (tooltipBox && tooltipBox.getBoundingClientRect) {
+	        tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+	      }
+	    } else {
+	      tooltipBox = box;
 	    }
 
-	    return buf.join('');
-	  }
-	};
+	    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 LiveNodeList(node, refresh) {
-	  this._node = node;
-	  this._refresh = refresh;
 
-	  _updateLiveList(this);
-	}
+	        html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+	      }
 
-	function _updateLiveList(list) {
-	  var inc = list._node._inc || list._node.ownerDocument._inc;
+	      html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-	  if (list._inc != inc) {
-	    var ls = list._refresh(list._node); //console.log(ls.length)
+	      html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
+	      if (options.buttonText && options.buttonCallback) {
+	        html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+	      }
 
-	    __set__(list, 'length', ls.length);
+	      var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+	      tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
-	    copy$1(ls, list);
-	    list._inc = inc;
-	  }
-	}
+	      if (options.buttonText && options.buttonCallback) {
+	        var button = tooltip.selectAll('.button-section .button.action');
+	        button.on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          options.buttonCallback();
+	        });
+	      }
 
-	LiveNodeList.prototype.item = function (i) {
-	  _updateLiveList(this);
+	      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.
 
-	  return this[i];
-	};
+	      if (options.tooltipClass === 'intro-mouse') {
+	        tip.height += 80;
+	      } // trim box dimensions to just the portion that fits in the container..
 
-	_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 
-	 */
 
+	      if (tooltipBox.top + tooltipBox.height > h) {
+	        tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+	      }
 
-	function NamedNodeMap() {}
+	      if (tooltipBox.left + tooltipBox.width > w) {
+	        tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+	      } // determine tooltip placement..
 
-	function _findNodeIndex(list, node) {
-	  var i = list.length;
 
-	  while (i--) {
-	    if (list[i] === node) {
-	      return i;
-	    }
-	  }
-	}
+	      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 _addNamedNode(el, list, newAttr, oldAttr) {
-	  if (oldAttr) {
-	    list[_findNodeIndex(list, oldAttr)] = newAttr;
-	  } else {
-	    list[list.length++] = newAttr;
-	  }
+	        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];
+	          }
+	        }
+	      }
+
+	      if (options.duration !== 0 || !tooltip.classed(side)) {
+	        tooltip.call(uiToggle(true));
+	      }
+
+	      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)
 
-	  if (el) {
-	    newAttr.ownerElement = el;
-	    var doc = el.ownerDocument;
+	      var shiftY = 0;
 
-	    if (doc) {
-	      oldAttr && _onRemoveAttribute(doc, el, oldAttr);
+	      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;
+	        }
+	      }
 
-	      _onAddAttribute(doc, el, newAttr);
+	      tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+	    } else {
+	      tooltip.classed('in', false).call(uiToggle(false));
 	    }
-	  }
-	}
 
-	function _removeNamedNode(el, list, attr) {
-	  //console.log('remove attr:'+attr)
-	  var i = _findNodeIndex(list, attr);
+	    curtain.cut(box, options.duration);
+	    return tooltip;
+	  };
 
-	  if (i >= 0) {
-	    var lastIndex = list.length - 1;
+	  curtain.cut = function (datum, duration) {
+	    darkness.datum(datum).interrupt();
+	    var selection;
 
-	    while (i < lastIndex) {
-	      list[i] = list[++i];
+	    if (duration === 0) {
+	      selection = darkness;
+	    } else {
+	      selection = darkness.transition().duration(duration || 600).ease(linear$1);
 	    }
 
-	    list.length = lastIndex;
+	    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';
+	    });
+	  };
 
-	    if (el) {
-	      var doc = el.ownerDocument;
+	  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.
 
-	      if (doc) {
-	        _onRemoveAttribute(doc, el, attr);
 
-	        attr.ownerElement = null;
-	      }
-	    }
-	  } else {
-	    throw DOMException$2(NOT_FOUND_ERR, new Error(el.tagName + '@' + attr));
+	  function copyBox(src) {
+	    return {
+	      top: src.top,
+	      right: src.right,
+	      bottom: src.bottom,
+	      left: src.left,
+	      width: src.width,
+	      height: src.height
+	    };
 	  }
-	}
 
-	NamedNodeMap.prototype = {
-	  length: 0,
-	  item: NodeList.prototype.item,
-	  getNamedItem: function getNamedItem(key) {
-	    //		if(key.indexOf(':')>0 || key == 'xmlns'){
-	    //			return null;
-	    //		}
-	    //console.log()
-	    var i = this.length;
+	  return curtain;
+	}
 
-	    while (i--) {
-	      var attr = this[i]; //console.log(attr.nodeName,key)
+	function uiIntroWelcome(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var chapter = {
+	    title: 'intro.welcome.title'
+	  };
 
-	      if (attr.nodeName == key) {
-	        return attr;
-	      }
-	    }
-	  },
-	  setNamedItem: function setNamedItem(attr) {
-	    var el = attr.ownerElement;
+	  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
+	    });
+	  }
 
-	    if (el && el != this._ownerElement) {
-	      throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-	    }
+	  function practice() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: words
+	    });
+	  }
 
-	    var oldAttr = this.getNamedItem(attr.nodeName);
+	  function words() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: chapters
+	    });
+	  }
 
-	    _addNamedNode(this._ownerElement, this, attr, oldAttr);
+	  function chapters() {
+	    dispatch.call('done');
+	    reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+	      next: _t('intro.navigation.title')
+	    }));
+	  }
 
-	    return oldAttr;
-	  },
+	  chapter.enter = function () {
+	    welcome();
+	  };
 
-	  /* returns Node */
-	  setNamedItemNS: function setNamedItemNS(attr) {
-	    // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-	    var el = attr.ownerElement,
-	        oldAttr;
+	  chapter.exit = function () {
+	    context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+	  };
 
-	    if (el && el != this._ownerElement) {
-	      throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-	    }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	    oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	    _addNamedNode(this._ownerElement, this, attr, oldAttr);
+	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'
+	  };
 
-	    return oldAttr;
-	  },
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	  /* returns Node */
-	  removeNamedItem: function removeNamedItem(key) {
-	    var attr = this.getNamedItem(key);
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	    _removeNamedNode(this._ownerElement, this, attr);
+	  function isTownHallSelected() {
+	    var ids = context.selectedIDs();
+	    return ids.length === 1 && ids[0] === hallId;
+	  }
 
-	    return attr;
-	  },
-	  // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-	  //for level2
-	  removeNamedItemNS: function removeNamedItemNS(namespaceURI, localName) {
-	    var attr = this.getNamedItemNS(namespaceURI, localName);
+	  function dragMap() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(townHall, context.map().center());
 
-	    _removeNamedNode(this._ownerElement, this, attr);
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	    return attr;
-	  },
-	  getNamedItemNS: function getNamedItemNS(namespaceURI, localName) {
-	    var i = this.length;
+	    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();
 
-	    while (i--) {
-	      var node = this[i];
+	        if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+	          context.map().on('move.intro', null);
+	          timeout(function () {
+	            continueTo(zoomMap);
+	          }, 3000);
+	        }
+	      });
+	    }, msec + 100);
 
-	      if (node.localName == localName && node.namespaceURI == namespaceURI) {
-	        return node;
-	      }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
-
-	    return null;
 	  }
-	};
-	/**
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-	 */
 
-	function DOMImplementation(
-	/* Object */
-	features) {
-	  this._features = {};
+	  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);
+	      }
+	    });
 
-	  if (features) {
-	    for (var feature in features) {
-	      this._features = features[feature];
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
 	  }
-	}
-	DOMImplementation.prototype = {
-	  hasFeature: function hasFeature(
-	  /* 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 createDocument(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;
+	  function features() {
+	    var onClick = function onClick() {
+	      continueTo(pointsLinesAreas);
+	    };
 
-	    if (doctype) {
-	      doc.appendChild(doctype);
-	    }
+	    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
+	      });
+	    });
 
-	    if (qualifiedName) {
-	      var root = doc.createElementNS(namespaceURI, qualifiedName);
-	      doc.appendChild(root);
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    return doc;
-	  },
-	  // Introduced in DOM Level 2:
-	  createDocumentType: function createDocumentType(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;
+	  function pointsLinesAreas() {
+	    var onClick = function onClick() {
+	      continueTo(nodesWays);
+	    };
 
-	    return node;
-	  }
-	};
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-	 */
+	    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 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 insertBefore(newChild, refChild) {
-	    //raises 
-	    return _insertBefore(this, newChild, refChild);
-	  },
-	  replaceChild: function replaceChild(newChild, oldChild) {
-	    //raises 
-	    this.insertBefore(newChild, oldChild);
-
-	    if (oldChild) {
-	      this.removeChild(oldChild);
-	    }
-	  },
-	  removeChild: function removeChild(oldChild) {
-	    return _removeChild(this, oldChild);
-	  },
-	  appendChild: function appendChild(newChild) {
-	    return this.insertBefore(newChild, null);
-	  },
-	  hasChildNodes: function hasChildNodes() {
-	    return this.firstChild != null;
-	  },
-	  cloneNode: function cloneNode(deep) {
-	    return _cloneNode(this.ownerDocument || this, this, deep);
-	  },
-	  // Modified in DOM Level 2:
-	  normalize: function normalize() {
-	    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;
-	      }
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
-	  },
-	  // Introduced in DOM Level 2:
-	  isSupported: function isSupported(feature, version) {
-	    return this.ownerDocument.implementation.hasFeature(feature, version);
-	  },
-	  // Introduced in DOM Level 2:
-	  hasAttributes: function hasAttributes() {
-	    return this.attributes.length > 0;
-	  },
-	  lookupPrefix: function lookupPrefix(namespaceURI) {
-	    var el = this;
+	  }
 
-	    while (el) {
-	      var map = el._nsMap; //console.dir(map)
+	  function nodesWays() {
+	    var onClick = function onClick() {
+	      continueTo(clickTownHall);
+	    };
 
-	      if (map) {
-	        for (var n in map) {
-	          if (map[n] == namespaceURI) {
-	            return n;
-	          }
-	        }
-	      }
+	    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
+	      });
+	    });
 
-	      el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    return null;
-	  },
-	  // Introduced in DOM Level 3:
-	  lookupNamespaceURI: function lookupNamespaceURI(prefix) {
-	    var el = this;
-
-	    while (el) {
-	      var map = el._nsMap; //console.dir(map)
+	  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
 
-	      if (map) {
-	        if (prefix in map) {
-	          return map[prefix];
-	        }
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
 	      }
+	    });
 
-	      el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
-
-	    return null;
-	  },
-	  // Introduced in DOM Level 3:
-	  isDefaultNamespace: function isDefaultNamespace(namespaceURI) {
-	    var prefix = this.lookupPrefix(namespaceURI);
-	    return prefix == null;
 	  }
-	};
-
-	function _xmlEncoder(c) {
-	  return c == '<' && '&lt;' || c == '>' && '&gt;' || c == '&' && '&amp;' || c == '"' && '&quot;' || '&#' + c.charCodeAt() + ';';
-	}
 
-	copy$1(NodeType, Node);
-	copy$1(NodeType, Node.prototype);
-	/**
-	 * @param callback return true for continue,false for break
-	 * @return boolean true: break visit;
-	 */
+	  function selectedTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return clickTownHall();
+	    var box = pointBox(entity.loc, context);
 
-	function _visitNode(node, callback) {
-	  if (callback(node)) {
-	    return true;
-	  }
+	    var onClick = function onClick() {
+	      continueTo(editorTownHall);
+	    };
 
-	  if (node = node.firstChild) {
-	    do {
-	      if (_visitNode(node, callback)) {
-	        return true;
+	    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);
 	      }
-	    } 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 continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
 	  }
-	}
 
-	function _onUpdateChild(doc, el, newChild) {
-	  if (doc && doc._inc) {
-	    doc._inc++; //update childNodes
+	  function editorTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
-	    var cs = el.childNodes;
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	    if (newChild) {
-	      cs[cs.length++] = newChild;
-	    } else {
-	      //console.log(1)
-	      var child = el.firstChild;
-	      var i = 0;
+	    var onClick = function onClick() {
+	      continueTo(presetTownHall);
+	    };
 
-	      while (child) {
-	        cs[i++] = child;
-	        child = child.nextSibling;
+	    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);
 	      }
+	    });
 
-	      cs.length = i;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
 	  }
-	}
-	/**
-	 * 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);
+	  function presetTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	  return child;
-	}
-	/**
-	 * preformance key(refChild == null)
-	 */
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
-	function _insertBefore(parentNode, newChild, nextChild) {
-	  var cp = newChild.parentNode;
+	    var entity = context.entity(context.selectedIDs()[0]);
+	    var preset = _mainPresetIndex.match(entity, context.graph());
 
-	  if (cp) {
-	    cp.removeChild(newChild); //remove and update
-	  }
+	    var onClick = function onClick() {
+	      continueTo(fieldsTownHall);
+	    };
 
-	  if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
-	    var newFirst = newChild.firstChild;
+	    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);
+	      }
+	    });
 
-	    if (newFirst == null) {
-	      return newChild;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
-
-	    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;
-	  }
+	  function fieldsTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	  if (nextChild == null) {
-	    parentNode.lastChild = newLast;
-	  } else {
-	    nextChild.previousSibling = newLast;
-	  }
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	  do {
-	    newFirst.parentNode = parentNode;
-	  } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	  _onUpdateChild(parentNode.ownerDocument || parentNode, parentNode); //console.log(parentNode.lastChild.nextSibling == null)
+	    var onClick = function onClick() {
+	      continueTo(closeTownHall);
+	    };
 
+	    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);
+	      }
+	    });
 
-	  if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-	    newChild.firstChild = newChild.lastChild = null;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  return newChild;
-	}
-
-	function _appendSingleChild(parentNode, newChild) {
-	  var cp = newChild.parentNode;
-
-	  if (cp) {
-	    var pre = parentNode.lastChild;
-	    cp.removeChild(newChild); //remove and update
+	  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: {
+	        html: 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: {
+	          html: icon(href, 'inline')
+	        }
+	      }), {
+	        duration: 0
+	      });
+	    });
 
-	    var pre = parentNode.lastChild;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  var pre = parentNode.lastChild;
-	  newChild.parentNode = parentNode;
-	  newChild.previousSibling = pre;
-	  newChild.nextSibling = null;
+	  function searchStreet() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial'); // ensure spring street exists
 
-	  if (pre) {
-	    pre.nextSibling = newChild;
-	  } else {
-	    parentNode.firstChild = newChild;
-	  }
+	    var msec = transitionTime(springStreet, context.map().center());
 
-	  parentNode.lastChild = newChild;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	  _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
+	    context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-	  return newChild; //console.log("__aa",parentNode.lastChild.nextSibling == null)
-	}
+	    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);
+	  }
 
-	Document.prototype = {
-	  //implementation : null,
-	  nodeName: '#document',
-	  nodeType: DOCUMENT_NODE,
-	  doctype: null,
-	  documentElement: null,
-	  _inc: 1,
-	  insertBefore: function insertBefore(newChild, refChild) {
-	    //raises 
-	    if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-	      var child = newChild.firstChild;
+	  function checkSearchResult() {
+	    var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-	      while (child) {
-	        var next = child.nextSibling;
-	        this.insertBefore(child, refChild);
-	        child = next;
-	      }
+	    var firstName = first.select('.entity-name');
+	    var name = _t('intro.graph.name.spring-street');
 
-	      return newChild;
+	    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);
 	    }
 
-	    if (this.documentElement == null && newChild.nodeType == ELEMENT_NODE) {
-	      this.documentElement = newChild;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    return _insertBefore(this, newChild, refChild), newChild.ownerDocument = this, newChild;
-	  },
-	  removeChild: function removeChild(oldChild) {
-	    if (this.documentElement == oldChild) {
-	      this.documentElement = null;
+	  function selectedStreet() {
+	    if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	      return searchStreet();
 	    }
 
-	    return _removeChild(this, oldChild);
-	  },
-	  // Introduced in DOM Level 2:
-	  importNode: function importNode(importedNode, deep) {
-	    return _importNode(this, importedNode, deep);
-	  },
-	  // Introduced in DOM Level 2:
-	  getElementById: function getElementById(id) {
-	    var rtv = null;
+	    var onClick = function onClick() {
+	      continueTo(editorStreet);
+	    };
 
-	    _visitNode(this.documentElement, function (node) {
-	      if (node.nodeType == ELEMENT_NODE) {
-	        if (node.getAttribute('id') == id) {
-	          rtv = node;
-	          return true;
-	        }
-	      }
+	    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.
 
-	    return rtv;
-	  },
-	  //document factory method:
-	  createElement: function createElement(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 createDocumentFragment() {
-	    var node = new DocumentFragment();
-	    node.ownerDocument = this;
-	    node.childNodes = new NodeList();
-	    return node;
-	  },
-	  createTextNode: function createTextNode(data) {
-	    var node = new Text();
-	    node.ownerDocument = this;
-	    node.appendData(data);
-	    return node;
-	  },
-	  createComment: function createComment(data) {
-	    var node = new Comment();
-	    node.ownerDocument = this;
-	    node.appendData(data);
-	    return node;
-	  },
-	  createCDATASection: function createCDATASection(data) {
-	    var node = new CDATASection();
-	    node.ownerDocument = this;
-	    node.appendData(data);
-	    return node;
-	  },
-	  createProcessingInstruction: function createProcessingInstruction(target, data) {
-	    var node = new ProcessingInstruction();
-	    node.ownerDocument = this;
-	    node.tagName = node.target = target;
-	    node.nodeValue = node.data = data;
-	    return node;
-	  },
-	  createAttribute: function createAttribute(name) {
-	    var node = new Attr();
-	    node.ownerDocument = this;
-	    node.name = name;
-	    node.nodeName = name;
-	    node.localName = name;
-	    node.specified = true;
-	    return node;
-	  },
-	  createEntityReference: function createEntityReference(name) {
-	    var node = new EntityReference();
-	    node.ownerDocument = this;
-	    node.nodeName = name;
-	    return node;
-	  },
-	  // Introduced in DOM Level 2:
-	  createElementNS: function createElementNS(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 createAttributeNS(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;
-	  }
-	};
+	    context.on('enter.intro', function (mode) {
+	      if (!context.hasEntity(springStreetId)) {
+	        return continueTo(searchStreet);
+	      }
 
-	_extends(Document, Node);
+	      var ids = context.selectedIDs();
 
-	function Element() {
-	  this._nsMap = {};
-	}
-	Element.prototype = {
-	  nodeType: ELEMENT_NODE,
-	  hasAttribute: function hasAttribute(name) {
-	    return this.getAttributeNode(name) != null;
-	  },
-	  getAttribute: function getAttribute(name) {
-	    var attr = this.getAttributeNode(name);
-	    return attr && attr.value || '';
-	  },
-	  getAttributeNode: function getAttributeNode(name) {
-	    return this.attributes.getNamedItem(name);
-	  },
-	  setAttribute: function setAttribute(name, value) {
-	    var attr = this.ownerDocument.createAttribute(name);
-	    attr.value = attr.nodeValue = "" + value;
-	    this.setAttributeNode(attr);
-	  },
-	  removeAttribute: function removeAttribute(name) {
-	    var attr = this.getAttributeNode(name);
-	    attr && this.removeAttributeNode(attr);
-	  },
-	  //four real opeartion method
-	  appendChild: function appendChild(newChild) {
-	    if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
-	      return this.insertBefore(newChild, null);
-	    } else {
-	      return _appendSingleChild(this, newChild);
-	    }
-	  },
-	  setAttributeNode: function setAttributeNode(newAttr) {
-	    return this.attributes.setNamedItem(newAttr);
-	  },
-	  setAttributeNodeNS: function setAttributeNodeNS(newAttr) {
-	    return this.attributes.setNamedItemNS(newAttr);
-	  },
-	  removeAttributeNode: function removeAttributeNode(oldAttr) {
-	    //console.log(this == oldAttr.ownerElement)
-	    return this.attributes.removeNamedItem(oldAttr.nodeName);
-	  },
-	  //get real attribute name,and remove it by removeAttributeNode
-	  removeAttributeNS: function removeAttributeNS(namespaceURI, localName) {
-	    var old = this.getAttributeNodeNS(namespaceURI, localName);
-	    old && this.removeAttributeNode(old);
-	  },
-	  hasAttributeNS: function hasAttributeNS(namespaceURI, localName) {
-	    return this.getAttributeNodeNS(namespaceURI, localName) != null;
-	  },
-	  getAttributeNS: function getAttributeNS(namespaceURI, localName) {
-	    var attr = this.getAttributeNodeNS(namespaceURI, localName);
-	    return attr && attr.value || '';
-	  },
-	  setAttributeNS: function setAttributeNS(namespaceURI, qualifiedName, value) {
-	    var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
-	    attr.value = attr.nodeValue = "" + value;
-	    this.setAttributeNode(attr);
-	  },
-	  getAttributeNodeNS: function getAttributeNodeNS(namespaceURI, localName) {
-	    return this.attributes.getNamedItemNS(namespaceURI, localName);
-	  },
-	  getElementsByTagName: function getElementsByTagName(tagName) {
-	    return new LiveNodeList(this, function (base) {
-	      var ls = [];
+	      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)
+	      }
+	    });
 
-	      _visitNode(base, function (node) {
-	        if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {
-	          ls.push(node);
-	        }
-	      });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	      return ls;
+	  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: {
+	        html: icon(href, 'inline')
+	      },
+	      field1: {
+	        html: onewayField.label()
+	      },
+	      field2: {
+	        html: maxspeedField.label()
+	      }
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(play);
 	    });
-	  },
-	  getElementsByTagNameNS: function getElementsByTagNameNS(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);
+	    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: {
+	          html: icon(href, 'inline')
+	        },
+	        field1: {
+	          html: onewayField.label()
+	        },
+	        field2: {
+	          html: maxspeedField.label()
 	        }
+	      }), {
+	        duration: 0
 	      });
-
-	      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 substringData(offset, count) {
-	    return this.data.substring(offset, offset + count);
-	  },
-	  appendData: function appendData(text) {
-	    text = this.data + text;
-	    this.nodeValue = this.data = text;
-	    this.length = text.length;
-	  },
-	  insertData: function insertData(offset, text) {
-	    this.replaceData(offset, 0, text);
-	  },
-	  appendChild: function appendChild(newChild) {
-	    throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR]);
-	  },
-	  deleteData: function deleteData(offset, count) {
-	    this.replaceData(offset, count, "");
-	  },
-	  replaceData: function replaceData(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 splitText(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);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
-
-	    return newNode;
 	  }
-	};
-
-	_extends(Text, CharacterData);
-
-	function Comment() {}
-	Comment.prototype = {
-	  nodeName: "#comment",
-	  nodeType: COMMENT_NODE
-	};
-
-	_extends(Comment, CharacterData);
-
-	function CDATASection() {}
-	CDATASection.prototype = {
-	  nodeName: "#cdata-section",
-	  nodeType: CDATA_SECTION_NODE
-	};
-
-	_extends(CDATASection, CharacterData);
-
-	function DocumentType() {}
-	DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-
-	_extends(DocumentType, Node);
-
-	function Notation() {}
-	Notation.prototype.nodeType = NOTATION_NODE;
-
-	_extends(Notation, Node);
-
-	function Entity() {}
-	Entity.prototype.nodeType = ENTITY_NODE;
 
-	_extends(Entity, Node);
-
-	function EntityReference() {}
-	EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-
-	_extends(EntityReference, Node);
-
-	function DocumentFragment() {}
-	DocumentFragment.prototype.nodeName = "#document-fragment";
-	DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;
-
-	_extends(DocumentFragment, Node);
-
-	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;
+	  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');
+	      }
+	    });
+	  }
 
-	  if (uri && prefix == null) {
-	    //console.log(prefix)
-	    var prefix = refNode.lookupPrefix(uri);
+	  chapter.enter = function () {
+	    dragMap();
+	  };
 
-	    if (prefix == null) {
-	      //isHTML = true;
-	      var visibleNamespaces = [{
-	        namespace: uri,
-	        prefix: null
-	      } //{namespace:uri,prefix:''}
-	      ];
-	    }
-	  }
+	  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);
+	  };
 
-	  serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces); //console.log('###',this.nodeType,uri,prefix,buf.join(''))
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	  return buf.join('');
+	  return utilRebind(chapter, dispatch, 'on');
 	}
 
-	function needNamespaceDefine(node, isHTML, visibleNamespaces) {
-	  var prefix = node.prefix || '';
-	  var uri = node.namespaceURI;
+	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'
+	  };
 
-	  if (!prefix && !uri) {
-	    return false;
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
 	  }
 
-	  if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" || uri == 'http://www.w3.org/2000/xmlns/') {
-	    return false;
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
 	  }
 
-	  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)
+	  function addPoint() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(intersection, context.map().center());
 
-	    if (ns.prefix == prefix) {
-	      return ns.namespace != uri;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
-	  } //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)
 
+	    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);
 
-	  return true;
-	}
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {
-	  if (nodeFilter) {
-	    node = nodeFilter(node);
+	  function placePoint() {
+	    if (context.mode().id !== 'add-point') {
+	      return chapter.restart();
+	    }
 
-	    if (node) {
-	      if (typeof node == 'string') {
-	        buf.push(node);
-	        return;
-	      }
-	    } else {
-	      return;
-	    } //buf.sort.apply(attrs, attributeSorter);
+	    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.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  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);
+	  function searchPreset() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // disallow scrolling
 
-	      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
-	          });
-	        }
+	    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);
 	      }
 
-	      for (var i = 0; i < len; i++) {
-	        var attr = attrs.item(i);
+	      var ids = context.selectedIDs();
 
-	        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
-	          });
-	        }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+	        // keep the user's point selected..
+	        context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-	        serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
-	      } // add namespace for current node		
+	        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);
+	      }
+	    });
 
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	      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 (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);
 	        });
 	      }
+	    }
 
-	      if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {
-	        buf.push('>'); //if is cdata child node
+	    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();
+	    }
+	  }
 
-	        if (isHTML && /^script$/i.test(nodeName)) {
-	          while (child) {
-	            if (child.data) {
-	              buf.push(child.data);
-	            } else {
-	              serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-	            }
+	  function aboutFeatureEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    }
 
-	            child = child.nextSibling;
-	          }
-	        } else {
-	          while (child) {
-	            serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-	            child = child.nextSibling;
-	          }
+	    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);
+	    });
 
-	        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, "-->");
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    case DOCUMENT_TYPE_NODE:
-	      var pubid = node.publicId;
-	      var sysid = node.systemId;
-	      buf.push('<!DOCTYPE ', node.name);
+	  function addName() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // reset pane, in case user happened to change it..
 
-	      if (pubid) {
-	        buf.push(' PUBLIC "', pubid);
 
-	        if (sysid && sysid != '.') {
-	          buf.push('" "', sysid);
-	        }
+	    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);
 
-	        buf.push('">');
-	      } else if (sysid && sysid != '.') {
-	        buf.push(' SYSTEM "', sysid, '">');
+	      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);
+	          }
+	        });
+	        tooltip.select('.instruction').style('display', 'none');
 	      } else {
-	        var sub = node.internalSubset;
-
-	        if (sub) {
-	          buf.push(" [", sub, "]");
-	        }
-
-	        buf.push(">");
+	        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);
+	    });
 
-	      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;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
 	  }
 
-	  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;
+	  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: {
+	        html: icon(href, 'inline')
 	      }
-	    }
-	  }
+	    }));
 
-	  if (node.childNodes) {
-	    node2.childNodes = new NodeList();
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  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;
+	  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..
 
-	      for (var i = 0; i < len; i++) {
-	        node2.setAttributeNode(_cloneNode(doc, attrs.item(i), true));
-	      }
+	    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());
 
-	      break;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	    case ATTRIBUTE_NODE:
-	      deep = true;
-	  }
+	    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..
 
-	  if (deep) {
-	    var child = node.firstChild;
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        continueTo(updatePoint);
+	      });
+	    }, msec + 100);
 
-	    while (child) {
-	      node2.appendChild(_cloneNode(doc, child, deep));
-	      child = child.nextSibling;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
 	  }
 
-	  return node2;
-	}
-
-	function __set__(object, key, value) {
-	  object[key] = value;
-	} //do dynamic
-
-
-	try {
-	  if (Object.defineProperty) {
-	    var getTextContent = 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;
-	      }
-	    };
+	  function updatePoint() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to untag the point..
 
-	    Object.defineProperty(LiveNodeList.prototype, 'length', {
-	      get: function get() {
-	        _updateLiveList(this);
 
-	        return this.$$length;
-	      }
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
 	    });
-	    Object.defineProperty(Node.prototype, 'textContent', {
-	      get: function get() {
-	        return getTextContent(this);
-	      },
-	      set: function set(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;
-	        }
-	      }
+	    context.history().on('change.intro', function () {
+	      continueTo(updateCloseEditor);
 	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+	        tooltipClass: 'intro-points-describe'
+	      });
+	    }, 400);
 
-	    __set__ = function __set__(object, key, value) {
-	      //console.log(value)
-	      object['$$' + key] = value;
-	    };
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
 	  }
-	} catch (e) {//ie8
-	} //if(typeof require == 'function'){
 
+	  function updateCloseEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to change it..
 
-	var DOMImplementation_1 = DOMImplementation;
-	var XMLSerializer_1 = XMLSerializer$1; //}
 
-	var dom = {
-	  DOMImplementation: DOMImplementation_1,
-	  XMLSerializer: XMLSerializer_1
-	};
+	    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: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }));
+	    }, 500);
 
-	var domParser = createCommonjsModule(function (module, exports) {
-	  function DOMParser(options) {
-	    this.options = options || {
-	      locator: {}
-	    };
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  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);
-	    }
+	  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
 
-	    sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
-	    sax.domBuilder = options.domBuilder || domBuilder;
+	    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
+	    });
 
-	    if (/\/x?html?$/.test(mimeType)) {
-	      entityMap.nbsp = '\xa0';
-	      entityMap.copy = '\xa9';
-	      defaultNSMap[''] = 'http://www.w3.org/1999/xhtml';
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
+	  function enterDelete() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    var node = selectMenuItem(context, 'delete').node();
 
-	    if (source) {
-	      sax.parse(source, defaultNSMap, entityMap);
-	    } else {
-	      sax.errorHandler.error("invalid doc source");
+	    if (!node) {
+	      return continueTo(rightClickPoint);
 	    }
 
-	    return domBuilder.doc;
-	  };
+	    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
 
-	  function buildErrorHandler(errorImpl, domBuilder, locator) {
-	    if (!errorImpl) {
-	      if (domBuilder instanceof DOMHandler) {
-	        return domBuilder;
+	    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);
 	      }
+	    });
 
-	      errorImpl = domBuilder;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    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;
-	      }
+	  function undo() {
+	    context.history().on('change.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-	      errorHandler[key] = fn && function (msg) {
-	        fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
-	      } || function () {};
+	    function continueTo(nextStep) {
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
-
-	    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;
+	  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');
+	      }
+	    });
 	  }
-	  /**
-	   * @see org.xml.sax.ContentHandler#startDocument
-	   * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-	   */
-
 
-	  DOMHandler.prototype = {
-	    startDocument: function startDocument() {
-	      this.doc = new DOMImplementation().createDocument(null, null, null);
+	  chapter.enter = function () {
+	    addPoint();
+	  };
 
-	      if (this.locator) {
-	        this.doc.documentURI = this.locator.systemId;
-	      }
-	    },
-	    startElement: function startElement(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 endElement(namespaceURI, localName, qName) {
-	      var current = this.currentElement;
-	      var tagName = current.tagName;
-	      this.currentElement = current.parentNode;
-	    },
-	    startPrefixMapping: function startPrefixMapping(prefix, uri) {},
-	    endPrefixMapping: function endPrefixMapping(prefix) {},
-	    processingInstruction: function processingInstruction(target, data) {
-	      var ins = this.doc.createProcessingInstruction(target, data);
-	      this.locator && position(this.locator, ins);
-	      appendElement(this, ins);
-	    },
-	    ignorableWhitespace: function ignorableWhitespace(ch, start, length) {},
-	    characters: function characters(chars, start, length) {
-	      chars = _toString.apply(this, arguments); //console.log(chars)
+	  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);
+	  };
 
-	      if (chars) {
-	        if (this.cdata) {
-	          var charNode = this.doc.createCDATASection(chars);
-	        } else {
-	          var charNode = this.doc.createTextNode(chars);
-	        }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        if (this.currentElement) {
-	          this.currentElement.appendChild(charNode);
-	        } else if (/^\s*$/.test(chars)) {
-	          this.doc.appendChild(charNode); //process xml
-	        }
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        this.locator && position(this.locator, charNode);
-	      }
-	    },
-	    skippedEntity: function skippedEntity(name) {},
-	    endDocument: function endDocument() {
-	      this.doc.normalize();
-	    },
-	    setDocumentLocator: function setDocumentLocator(locator) {
-	      if (this.locator = locator) {
-	        // && !('lineNumber' in locator)){
-	        locator.lineNumber = 0;
-	      }
-	    },
-	    //LexicalHandler
-	    comment: function comment(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 startCDATA() {
-	      //used in characters() methods
-	      this.cdata = true;
-	    },
-	    endCDATA: function endCDATA() {
-	      this.cdata = false;
-	    },
-	    startDTD: function startDTD(name, publicId, systemId) {
-	      var impl = this.doc.implementation;
+	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 = [];
 
-	      if (impl && impl.createDocumentType) {
-	        var dt = impl.createDocumentType(name, publicId, systemId);
-	        this.locator && position(this.locator, dt);
-	        appendElement(this, dt);
-	      }
-	    },
+	  var _areaID;
 
-	    /**
-	     * @see org.xml.sax.ErrorHandler
-	     * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
-	     */
-	    warning: function warning(error) {
-	      console.warn('[xmldom warning]\t' + error, _locator(this.locator));
-	    },
-	    error: function error(_error) {
-	      console.error('[xmldom error]\t' + _error, _locator(this.locator));
-	    },
-	    fatalError: function fatalError(error) {
-	      console.error('[xmldom fatalError]\t' + error, _locator(this.locator));
-	      throw error;
-	    }
+	  var chapter = {
+	    title: 'intro.areas.title'
 	  };
 
-	  function _locator(l) {
-	    if (l) {
-	      return '\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';
-	    }
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
 	  }
 
-	  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 eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
 	  }
-	  /*
-	   * @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) {};
-	   */
 
+	  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);
+	  }
 
-	  "endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g, function (key) {
-	    DOMHandler.prototype[key] = function () {
-	      return null;
-	    };
-	  });
-	  /* 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 addArea() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _areaID = null;
+	    var msec = transitionTime(playground, context.map().center());
 
-	  function appendElement(hander, node) {
-	    if (!hander.currentElement) {
-	      hander.doc.appendChild(node);
-	    } else {
-	      hander.currentElement.appendChild(node);
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
-	  } //appendChild and setAttributeNS are preformance key
-	  //if(typeof require == 'function'){
-
-
-	  var XMLReader = sax.XMLReader;
-	  var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-	  exports.XMLSerializer = dom.XMLSerializer;
-	  exports.DOMParser = DOMParser; //}
-	});
-
-	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;
+	    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);
 
-	      for (var i = 0, h = 0; i < x.length; i++) {
-	        h = (h << 5) - h + x.charCodeAt(i) | 0;
-	      }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	      return h;
-	    } // all Y children of X
+	  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 get(x, y) {
-	      return x.getElementsByTagName(y);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function attr(x, y) {
-	      return x.getAttribute(y);
+	  function continuePlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
 	    }
 
-	    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
+	    _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 norm(el) {
-	      if (el.normalize) {
-	        el.normalize();
+	        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();
 	      }
+	    });
 
-	      return el;
-	    } // cast array x into numbers
-
-
-	    function numarray(x) {
-	      for (var j = 0, o = []; j < x.length; j++) {
-	        o[j] = parseFloat(x[j]);
-	      }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	      return o;
-	    } // get the content of a text node, if any
+	  function finishPlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
 
+	    _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
 
-	    function nodeVal(x) {
-	      if (x) {
-	        norm(x);
+	    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();
 	      }
+	    });
 
-	      return x && x.textContent || '';
-	    } // get the contents of multiple text nodes, if present
+	    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 getMulti(x, ys) {
-	      var o = {},
-	          n,
-	          k;
+	    var ids = context.selectedIDs();
 
-	      for (k = 0; k < ys.length; k++) {
-	        n = get1(x, ys[k]);
-	        if (n) o[ys[k]] = nodeVal(n);
-	      }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      context.enter(modeSelect(context, [_areaID]));
+	    } // disallow scrolling
 
-	      return o;
-	    } // add properties of Y to X, overwriting if present in both
 
+	    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 extend(x, y) {
-	      for (var k in y) {
-	        x[k] = y[k];
+	    context.on('enter.intro', function (mode) {
+	      if (!_areaID || !context.hasEntity(_areaID)) {
+	        return continueTo(addArea);
 	      }
-	    } // get one coordinate from a coordinate array, if any
 
+	      var ids = context.selectedIDs();
 
-	    function coord1(v) {
-	      return numarray(v.replace(removeSpace, '').split(','));
-	    } // get all coordinates from a coordinate array as [[],[]]
-
+	      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..
 
-	    function coord(v) {
-	      var coords = v.replace(trimSpace, '').split(splitSpace),
-	          o = [];
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	      for (var i = 0; i < coords.length; i++) {
-	        o.push(coord1(coords[i]));
+	        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);
 	      }
+	    });
 
-	      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));
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        if (!isNaN(e)) {
-	          ll.push(e);
-	        }
+	      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);
+	        });
 	      }
-
-	      return {
-	        coordinates: ll,
-	        time: time ? nodeVal(time) : null,
-	        heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-	      };
-	    } // 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 === "undefined" ? "undefined" : _typeof(process)) === 'object' && !process.browser) {
-	      serializer = new domParser.XMLSerializer();
+	    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 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);
+	  function clickAddField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
 	    }
 
-	    var t = {
-	      kml: function kml(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;
-	        }
-
-	        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);
-	          }
+	    var ids = context.selectedIDs();
 
-	          if (v.length === 6 || v.length === 3) {
-	            color = v;
-	          }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	          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);
-	          }
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // disallow scrolling
 
-	          return [color, isNaN(opacity) ? undefined : opacity];
-	        }
 
-	        function gxCoord(v) {
-	          return numarray(v.split(' '));
-	        }
+	    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.
 
-	        function gxCoords(root) {
-	          var elems = get(root, 'coord'),
-	              coords = [],
-	              times = [];
-	          if (elems.length === 0) elems = get(root, 'gx:coord');
+	      var entity = context.entity(_areaID);
 
-	          for (var i = 0; i < elems.length; i++) {
-	            coords.push(gxCoord(nodeVal(elems[i])));
-	          }
+	      if (entity.tags.description) {
+	        return continueTo(play);
+	      } // scroll "Add field" into view
 
-	          var timeElems = get(root, 'when');
 
-	          for (var j = 0; j < timeElems.length; j++) {
-	            times.push(nodeVal(timeElems[j]));
-	          }
+	      var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-	          return {
-	            coords: coords,
-	            times: times
+	      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 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);
-	                }
-	              }
-	            }
+	      timeout(function () {
+	        reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
+	          name: {
+	            html: nameField.label()
+	          },
+	          description: {
+	            html: descriptionField.label()
 	          }
-
-	          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');
+	        }), {
+	          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);
 	            }
-	          }
-
-	          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');
+	          }, 300);
+	        });
+	      }, 300); // after "Add Field" visible
+	    }, 400); // after editor pane visible
 
-	            for (i = 0; i < datas.length; i++) {
-	              properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-	            }
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            for (i = 0; i < simpleDatas.length; i++) {
-	              properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-	            }
-	          }
+	    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 (visibility) {
-	            properties.visibility = nodeVal(visibility);
-	          }
+	  function chooseDescriptionField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	          if (geomsAndTimes.coordTimes.length) {
-	            properties.coordTimes = geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-	          }
+	    var ids = context.selectedIDs();
 
-	          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];
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	        return gj;
-	      },
-	      gpx: function gpx(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);
-	        }
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // Make sure combobox is ready..
 
-	        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]));
-	        }
+	    if (context.container().select('div.combobox').empty()) {
+	      return continueTo(clickAddField);
+	    } // Watch for the combobox to go away..
 
-	        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);
+	    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: {
+	        html: descriptionField.label()
+	      }
+	    }), {
+	      duration: 300
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	          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');
+	    function continueTo(nextStep) {
+	      if (watcher) window.clearInterval(watcher);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            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);
-	            }
-	          }
+	  function describePlayground() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	          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
-	            }
-	          };
-	        }
+	    var ids = context.selectedIDs();
 
-	        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;
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	        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 = {};
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-	          if (extensions) {
-	            var lineStyle = get1(extensions, 'line');
+	    if (context.container().select('.form-field-description').empty()) {
+	      return continueTo(retryChooseDescription);
+	    }
 
-	            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
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+	      button: {
+	        html: icon('#iD-icon-close', 'inline')
+	      }
+	    }), {
+	      duration: 300
+	    });
 
-	              if (!isNaN(width)) style['stroke-width'] = width * 96 / 25.4;
-	            }
-	          }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	          return style;
-	        }
+	  function retryChooseDescription() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	        function getProperties(node) {
-	          var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-	              links = get(node, 'link');
-	          if (links.length) prop.links = [];
+	    var ids = context.selectedIDs();
 
-	          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);
-	          }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	          return prop;
-	        }
 
-	        return gj;
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
+	      field: {
+	        html: descriptionField.label()
 	      }
-	    };
-	    return t;
-	  }();
-
-	  module.exports = toGeoJSON;
-	});
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(clickAddField);
+	      }
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	var _initialized = false;
-	var _enabled = false;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	var _geojson;
+	  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 svgData(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    dispatch.call('change');
-	  }, 1000);
+	  chapter.enter = function () {
+	    addArea();
+	  };
 
-	  var _showLabels = true;
-	  var detected = utilDetect();
-	  var layer = select(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', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
-	  var _vtService;
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	  var _fileList;
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	  var _template;
+	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'
+	  };
 
-	  var _src;
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	  function init() {
-	    if (_initialized) return; // run once
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	    _geojson = {};
-	    _enabled = true;
+	  function addLine() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(tulipRoadStart, context.map().center());
 
-	    function over(d3_event) {
-	      d3_event.stopPropagation();
-	      d3_event.preventDefault();
-	      d3_event.dataTransfer.dropEffect = 'copy';
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
-	    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;
+	    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 getService() {
-	    if (services.vectorTile && !_vtService) {
-	      _vtService = services.vectorTile;
+	  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);
+	    });
 
-	      _vtService.event.on('loadedData', throttledRedraw);
-	    } else if (!services.vectorTile && _vtService) {
-	      _vtService = null;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
-
-	    return _vtService;
 	  }
 
-	  function showLayer() {
-	    layerOn();
-	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-	      dispatch.call('change');
+	  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..
+
+	    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 hideLayer() {
-	    throttledRedraw.cancel();
-	    layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  function layerOn() {
-	    layer.style('display', 'block');
+	  function isLineConnected() {
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+
+	    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 layerOff() {
-	    layer.selectAll('.viewfield-group').remove();
-	    layer.style('display', 'none');
-	  } // ensure that all geojson features in a collection have IDs
+	  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);
+	  }
 
+	  function continueLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
 
-	  function ensureIDs(gj) {
-	    if (!gj) return null;
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	    if (gj.type === 'FeatureCollection') {
-	      for (var i = 0; i < gj.features.length; i++) {
-	        ensureFeatureID(gj.features[i]);
+	    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();
 	      }
-	    } else {
-	      ensureFeatureID(gj);
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    return gj;
-	  } // ensure that each single Feature object has a unique ID
+	  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 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 ensureFeatureID(feature) {
-	    if (!feature) return;
-	    feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-	    return feature;
-	  } // Prefer an array of Features instead of a FeatureCollection
+	  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 continueTo(nextStep) {
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  } // selected wrong road type
 
-	  function getFeatures(gj) {
-	    if (!gj) return [];
 
-	    if (gj.type === 'FeatureCollection') {
-	      return gj.features;
-	    } else {
-	      return [gj];
+	  function retryPresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    }); // disallow scrolling
+
+	    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);
+
+	    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 featureKey(d) {
-	    return d.__featurehash__;
-	  }
+	  function nameRoad() {
+	    context.on('exit.intro', function () {
+	      continueTo(didNameRoad);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }), {
+	        tooltipClass: 'intro-lines-name_road'
+	      });
+	    }, 500);
 
-	  function isPolygon(d) {
-	    return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  function clipPathID(d) {
-	    return 'ideditor-data-' + d.__featurehash__ + '-clippath';
-	  }
+	  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 featureClasses(d) {
-	    return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
 	  }
 
-	  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
+	  function updateLine() {
+	    context.history().reset('doneAddLine');
 
-	    var geoData, polygonData;
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
-	    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);
+	    var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
+
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
-	    geoData = geoData.filter(getPath);
-	    polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
+	    context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	    timeout(function () {
+	      var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
 
-	    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 advance = function advance() {
+	        continueTo(addNode);
+	      };
 
-	    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
+	      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);
+	      nextStep();
+	    }
+	  }
+
+	  function addNode() {
+	    context.history().reset('doneAddLine');
+
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
+
+	    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);
+	      }
 
-	    var pathData = {
-	      fill: polygonData,
-	      shadow: geoData,
-	      stroke: geoData
-	    };
-	    var paths = datagroups.selectAll('path').data(function (layer) {
-	      return pathData[layer];
-	    }, featureKey); // exit
+	      if (changed.created().length === 1) {
+	        timeout(function () {
+	          continueTo(startDragEndpoint);
+	        }, 500);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        continueTo(updateLine);
+	      }
+	    });
 
-	    paths.exit().remove(); // enter/update
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    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
+	  function startDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	    layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+	    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 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 padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, startDragString, {
+	        duration: 0
 	      });
-	      var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+	      var entity = context.entity(woodRoadEndID);
 
-	      labels.exit().remove(); // enter/update
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+	        continueTo(finishDragEndpoint);
+	      }
+	    });
 
-	      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];
-	      });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
 	  }
 
-	  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');
-	  }
+	  function finishDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	  drawData.setFile = function (extension, data) {
-	    _template = null;
-	    _fileList = null;
-	    _geojson = null;
-	    _src = null;
-	    var gj;
+	    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);
+	      }
 
-	    switch (extension) {
-	      case '.gpx':
-	        gj = togeojson.gpx(xmlToDom(data));
-	        break;
+	      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);
 
-	      case '.kml':
-	        gj = togeojson.kml(xmlToDom(data));
-	        break;
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+	        continueTo(startDragEndpoint);
+	      }
+	    });
+	    context.on('enter.intro', function () {
+	      continueTo(startDragMidpoint);
+	    });
 
-	      case '.geojson':
-	      case '.json':
-	        gj = JSON.parse(data);
-	        break;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    gj = gj || {};
+	  function startDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	    if (Object.keys(gj).length) {
-	      _geojson = ensureIDs(gj);
-	      _src = extension + ' data file';
-	      this.fitZoom();
+	    if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+	      context.enter(modeSelect(context, [woodRoadID]));
 	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	    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);
+	      }
 
-	  drawData.showLabels = function (val) {
-	    if (!arguments.length) return _showLabels;
-	    _showLabels = val;
-	    return this;
-	  };
+	      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]));
+	      }
+	    });
 
-	  drawData.enabled = function (val) {
-	    if (!arguments.length) return _enabled;
-	    _enabled = val;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    if (_enabled) {
-	      showLayer();
-	    } else {
-	      hideLayer();
+	  function continueDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
 	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    box.height += 400;
 
-	  drawData.hasData = function () {
-	    var gj = _geojson || {};
-	    return !!(_template || Object.keys(gj).length);
-	  };
+	    var advance = function advance() {
+	      context.history().checkpoint('doneUpdateLine');
+	      continueTo(deleteLines);
+	    };
 
-	  drawData.template = function (val, src) {
-	    if (!arguments.length) return _template; // test source against OSM imagery blocklists..
+	    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);
+	      }
 
-	    var osm = context.connection();
+	      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
+	      });
+	    });
 
-	    if (osm) {
-	      var blocklists = osm.imageryBlocklists();
-	      var fail = false;
-	      var tested = 0;
-	      var regex;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	      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.
+	  function deleteLines() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
+
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return chapter.restart();
+	    }
 
+	    var msec = transitionTime(deleteLinesLoc, context.map().center());
 
-	      if (!tested) {
-	        regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-	        fail = regex.test(val);
-	      }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
-	    _template = val;
-	    _fileList = null;
-	    _geojson = null; // strip off the querystring/hash from the template,
-	    // it often includes the access token
+	    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;
 
-	    _src = src || 'vectortile:' + val.split(/[?#]/)[0];
-	    dispatch.call('change');
-	    return this;
-	  };
+	      var advance = function advance() {
+	        continueTo(rightClickIntersection);
+	      };
 
-	  drawData.geojson = function (gj, src) {
-	    if (!arguments.length) return _geojson;
-	    _template = null;
-	    _fileList = null;
-	    _geojson = null;
-	    _src = null;
-	    gj = gj || {};
+	      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);
 
-	    if (Object.keys(gj).length) {
-	      _geojson = ensureIDs(gj);
-	      _src = src || 'unknown.geojson';
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	  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);
 
-	  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();
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    reader.onload = function () {
-	      return function (e) {
-	        drawData.setFile(extension, e.target.result);
-	      };
-	    }();
+	  function splitIntersection() {
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(deleteLines);
+	    }
 
-	    reader.readAsText(f);
-	    return this;
-	  };
+	    var node = selectMenuItem(context, 'split').node();
 
-	  drawData.url = function (url, defaultExtension) {
-	    _template = null;
-	    _fileList = null;
-	    _geojson = null;
-	    _src = null; // strip off any querystring/hash from the url before checking extension
+	    if (!node) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    var testUrl = url.split(/[?#]/)[0];
-	    var extension = getExtension(testUrl) || defaultExtension;
+	    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();
 
-	    if (extension) {
-	      _template = null;
-	      d3_text(url).then(function (data) {
-	        drawData.setFile(extension, data);
-	      })["catch"](function () {
-	        /* ignore */
+	      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
 	      });
-	    } else {
-	      drawData.template(url);
+	    });
+	    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)
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    return this;
-	  };
+	  function retrySplit() {
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-	  drawData.getSrc = function () {
-	    return _src || '';
-	  };
+	    var advance = function advance() {
+	      continueTo(rightClickIntersection);
+	    };
 
-	  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 */
+	    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
+	      });
+	    });
 
-	      switch (geom.type) {
-	        case 'Point':
-	          c = [c];
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        case 'MultiPoint':
-	        case 'LineString':
-	          break;
+	  function didSplit() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
+
+	    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
 
-	        case 'MultiPolygon':
-	          c = utilArrayFlatten(c);
+	    context.on('enter.intro', function () {
+	      var ids = context.selectedIDs();
 
-	        case 'Polygon':
-	        case 'MultiLineString':
-	          c = utilArrayFlatten(c);
-	          break;
+	      if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+	        continueTo(multiSelect);
 	      }
-	      /* eslint-enable no-fallthrough */
+	    });
+	    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();
+	    }
+	  }
 
-	      return utilArrayUnion(coords, c);
-	    }, []);
+	  function multiSelect() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-	      var extent = geoExtent(d3_geoBounds({
-	        type: 'LineString',
-	        coordinates: coords
-	      }));
-	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+	    var ids = context.selectedIDs();
+	    var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+	    var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+
+	    if (hasWashington && hasTwelfth) {
+	      return continueTo(multiRightClick);
+	    } else if (!hasWashington && !hasTwelfth) {
+	      return continueTo(didSplit);
 	    }
 
-	    return this;
-	  };
+	    context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    timeout(function () {
+	      var selected, other, padding, box;
 
-	  init();
-	  return drawData;
-	}
+	      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 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 = [];
+	      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;
+	        }
 
-	    if (showTile) {
-	      debugData.push({
-	        "class": 'red',
-	        label: 'tile'
+	        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
+	        });
 	      });
-	    }
-
-	    if (showCollision) {
-	      debugData.push({
-	        "class": 'yellow',
-	        label: 'collision'
+	      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();
 	    }
+	  }
 
-	    if (showImagery) {
-	      debugData.push({
-	        "class": 'orange',
-	        label: 'imagery'
-	      });
+	  function multiRightClick() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
 	    }
 
-	    if (showTouchTargets) {
-	      debugData.push({
-	        "class": 'pink',
-	        label: 'touchTargets'
+	    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();
+
+	        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();
 	    }
+	  }
 
-	    if (showDownloaded) {
-	      debugData.push({
-	        "class": 'purple',
-	        label: 'downloaded'
-	      });
+	  function multiDelete() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
 	    }
 
-	    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;
+	    var node = selectMenuItem(context, 'delete').node();
+	    if (!node) return continueTo(multiRightClick);
+	    reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	      padding: 50
 	    });
-	    legendItems.exit().remove();
-	    legendItems.enter().append('span').attr('class', function (d) {
-	      return "debug-legend-item ".concat(d["class"]);
-	    }).text(function (d) {
-	      return d.label;
+	    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);
+	      }
 	    });
-	    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 */
-	    }); // downloaded
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    var osm = context.connection();
-	    var dataDownloaded = [];
+	  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);
+	      }
+	    });
 
-	    if (osm && showDownloaded) {
-	      var rtree = osm.caches('get').tile.rtree;
-	      dataDownloaded = rtree.all().map(function (bbox) {
-	        return {
-	          type: 'Feature',
-	          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]]]
-	          }
-	        };
-	      });
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
-	    var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
-	    downloaded.exit().remove();
-	    downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
+	  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');
+	      }
+	    });
+	  }
 
-	    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.
+	  chapter.enter = function () {
+	    addLine();
+	  };
 
+	  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);
+	  };
 
-	  drawDebug.enabled = function () {
-	    if (!arguments.length) {
-	      return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
-	    } else {
-	      return this;
-	    }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
 	  };
 
-	  return drawDebug;
+	  return utilRebind(chapter, dispatch, 'on');
 	}
 
-	/*
-	    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 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 svgDefs(context) {
-	  var _defsSelection = select(null);
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	  var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	  function drawDefs(selection) {
-	    _defsSelection = selection.append('defs'); // add markers
+	  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);
+	  }
 
-	    _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 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);
+	  }
 
+	  function addHouse() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _houseID = null;
+	    var msec = transitionTime(house, context.map().center());
 
-	    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);
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
-	    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');
+	    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);
 
-	    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
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    _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
+	  function startHouse() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addHouse);
+	    }
 
+	    _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
 
-	    addSprites(_spritesheetIds, true);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  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());
+	  function continueHouse() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addHouse);
+	    }
 
-	        if (overrideColors && d !== 'iD-sprite') {
-	          // allow icon colors to be overridden..
-	          select(node).selectAll('path').attr('fill', 'currentColor');
-	        }
-	      })["catch"](function () {
-	        /* ignore */
+	    _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
 	      });
 	    });
-	    spritesheets.exit().remove();
-	  }
-
-	  drawDefs.addSprites = addSprites;
-	  return drawDefs;
-	}
-
-	var _layerEnabled = false;
-
-	var _qaService;
-
-	function svgKeepRight(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    return dispatch.call('change');
-	  }, 1000);
+	    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);
+	        });
 
-	  var minZoom = 12;
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	        if (isMostlySquare(points)) {
+	          _houseID = way.id;
+	          return continueTo(chooseCategoryBuilding);
+	        } else {
+	          return continueTo(retryHouse);
+	        }
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	  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');
-	  } // Loosely-coupled keepRight service for fetching issues.
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function retryHouse() {
+	    var onClick = function onClick() {
+	      continueTo(addHouse);
+	    };
 
-	  function getService() {
-	    if (services.keepRight && !_qaService) {
-	      _qaService = services.keepRight;
+	    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
+	      });
+	    });
 
-	      _qaService.on('loaded', throttledRedraw);
-	    } else if (!services.keepRight && _qaService) {
-	      _qaService = null;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    return _qaService;
-	  } // Show the markers
-
-
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer.style('display', 'block');
+	  function chooseCategoryBuilding() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
 	    }
-	  } // Immediately remove the markers and their touch targets
 
+	    var ids = context.selectedIDs();
 
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      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.
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
 
-	  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.
+	    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..
+
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
+	      var ids = context.selectedIDs();
 
-	  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');
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
 	    });
-	  } // Update the issue markers
 
+	    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 updateMarkers() {
-	    if (!layerVisible || !_layerEnabled) return;
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = service ? service.getItems(projection) : [];
-	    var getTransform = svgPointTransform(projection); // Draw markers..
+	  function choosePresetHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	    var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
-	      return d.id;
-	    }); // exit
+	    var ids = context.selectedIDs();
 
-	    markers.exit().remove(); // enter
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	    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..
+	    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..
 
-	    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
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	    targets.exit().remove(); // enter/update
+	      var ids = context.selectedIDs();
 
-	    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);
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	    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];
+	    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();
 	    }
-	  } // Draw the keepRight layer and schedule loading issues and updating markers.
+	  }
 
+	  function closeEditorHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	  function drawKeepRight(selection) {
-	    var service = getService();
-	    var surface = context.surface();
+	    var ids = context.selectedIDs();
 
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
 	    }
 
-	    drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
-	    drawLayer.exit().remove();
-	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
+	    context.history().checkpoint('hasHouse');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }));
+	    }, 500);
 
-	    if (_layerEnabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
-	      }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
-	  } // Toggles the layer on and off
+	  }
 
+	  function rightClickHouse() {
+	    if (!_houseID) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasHouse');
+	    var zoom = context.map().zoom();
 
-	  drawKeepRight.enabled = function (val) {
-	    if (!arguments.length) return _layerEnabled;
-	    _layerEnabled = val;
+	    if (zoom < 20) {
+	      zoom = 20;
+	    }
 
-	    if (_layerEnabled) {
-	      layerOn();
-	    } else {
-	      layerOff();
+	    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);
+	    });
 
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
-	      }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    dispatch.call('change');
-	    return this;
-	  };
-
-	  drawKeepRight.supported = function () {
-	    return !!getService();
-	  };
+	  function clickSquare() {
+	    if (!_houseID) return chapter.restart();
+	    var entity = context.hasEntity(_houseID);
+	    if (!entity) return continueTo(rightClickHouse);
+	    var node = selectMenuItem(context, 'orthogonalize').node();
 
-	  return drawKeepRight;
-	}
+	    if (!node) {
+	      return continueTo(rightClickHouse);
+	    }
 
-	function svgGeolocate(projection) {
-	  var layer = select(null);
+	    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();
 
-	  var _position;
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickHouse);
+	      }
 
-	  function init() {
-	    if (svgGeolocate.initialized) return; // run once
+	      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.
 
-	    svgGeolocate.enabled = false;
-	    svgGeolocate.initialized = true;
-	  }
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(doneSquare);
+	        } else {
+	          continueTo(retryClickSquare);
+	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	  function showLayer() {
-	    layer.style('display', 'block');
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  function hideLayer() {
-	    layer.transition().duration(250).style('opacity', 0);
-	  }
+	  function retryClickSquare() {
+	    context.enter(modeBrowse(context));
+	    revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickHouse);
+	      }
+	    });
 
-	  function layerOn() {
-	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
 	  }
 
-	  function layerOff() {
-	    layer.style('display', 'none');
-	  }
+	  function doneSquare() {
+	    context.history().checkpoint('doneSquare');
+	    revealHouse(house, helpHtml('intro.buildings.done_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(addTank);
+	      }
+	    });
 
-	  function transform(d) {
-	    return svgPointTransform(projection)(d);
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
 	  }
 
-	  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...
-
-	    return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-	  }
+	  function addTank() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('doneSquare');
+	    _tankID = null;
+	    var msec = transitionTime(tank, context.map().center());
 
-	  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));
-	  }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	  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);
+	    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);
 
-	    if (enabled) {
-	      update();
-	    } else {
-	      layerOff();
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
 	  }
 
-	  drawLocation.enabled = function (position, enabled) {
-	    if (!arguments.length) return svgGeolocate.enabled;
-	    _position = position;
-	    svgGeolocate.enabled = enabled;
-
-	    if (svgGeolocate.enabled) {
-	      showLayer();
-	      layerOn();
-	    } else {
-	      hideLayer();
+	  function startTank() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addTank);
 	    }
 
-	    return this;
-	  };
-
-	  init();
-	  return drawLocation;
-	}
+	    _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 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;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	  var _rdrawn = new RBush();
+	  function continueTank() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addTank);
+	    }
 
-	  var _rskipped = new RBush();
+	    _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);
+	      }
+	    });
 
-	  var _textWidthCache = {};
-	  var _entitybboxes = {}; // Listed from highest to lowest priority
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	  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 searchPresetTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
-	  function shouldSkipIcon(preset) {
-	    var noIcons = ['building', 'landuse', 'natural'];
-	    return noIcons.some(function (s) {
-	      return preset.id.indexOf(s) >= 0;
-	    });
-	  }
+	    var ids = context.selectedIDs();
 
-	  function get(array, prop) {
-	    return function (d, i) {
-	      return array[i][prop];
-	    };
-	  }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    } // disallow scrolling
 
-	  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);
+	    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..
 
-	      if (str === null) {
-	        return size / 3 * 2 * text.length;
-	      } else {
-	        return size / 3 * (2 * text.length + str.length);
+	    context.on('enter.intro', function (mode) {
+	      if (!_tankID || !context.hasEntity(_tankID)) {
+	        return continueTo(addTank);
 	      }
-	    }
-	  }
 
-	  function drawLinePaths(selection, entities, filter, classes, labels) {
-	    var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
+	      var ids = context.selectedIDs();
 
-	    paths.exit().remove(); // enter/update
+	      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..
 
-	    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'));
-	  }
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	  function drawLineLabels(selection, entities, filter, classes, labels) {
-	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+	        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);
+	      }
+	    });
 
-	    texts.exit().remove(); // enter
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	    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
+	      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.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(closeEditorTank);
+	        });
+	      }
+	    }
 
-	    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 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 drawPointLabels(selection, entities, filter, classes, labels) {
-	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+	  function closeEditorTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
-	    texts.exit().remove(); // enter/update
+	    var ids = context.selectedIDs();
 
-	    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);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    }
+
+	    context.history().checkpoint('hasTank');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickTank);
 	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }));
+	    }, 500);
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  function drawAreaLabels(selection, entities, filter, classes, labels) {
-	    entities = entities.filter(hasText);
-	    labels = labels.filter(hasText);
-	    drawPointLabels(selection, entities, filter, classes, labels);
+	  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);
 
-	    function hasText(d, i) {
-	      return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
 	  }
 
-	  function drawAreaIcons(selection, entities, filter, classes, labels) {
-	    var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
-
-	    icons.exit().remove(); // enter/update
+	  function clickCircle() {
+	    if (!_tankID) return chapter.restart();
+	    var entity = context.hasEntity(_tankID);
+	    if (!entity) return continueTo(rightClickTank);
+	    var node = selectMenuItem(context, 'circularize').node();
 
-	    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 (!node) {
+	      return continueTo(rightClickTank);
+	    }
 
-	      if (!picon) {
-	        return '';
-	      } else {
-	        var isMaki = /^maki-/.test(picon);
-	        return '#' + picon + (isMaki ? '-15' : '');
+	    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 drawCollisionBoxes(selection, rtree, which) {
-	    var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
-	    var gj = [];
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickTank);
+	      }
 
-	    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]]]
-	        };
+	      reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	        duration: 0,
+	        padding: 50
 	      });
-	    }
-
-	    var boxes = selection.selectAll('.' + which).data(gj); // exit
+	    });
+	    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.
 
-	    boxes.exit().remove(); // enter/update
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(play);
+	        } else {
+	          continueTo(retryClickCircle);
+	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	    boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
 	  }
 
-	  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;
+	  function retryClickCircle() {
+	    context.enter(modeBrowse(context));
+	    revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickTank);
+	      }
+	    });
 
-	    for (i = 0; i < labelStack.length; i++) {
-	      labelable.push([]);
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
-	    if (fullRedraw) {
-	      _rdrawn.clear();
+	  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');
+	      }
+	    });
+	  }
 
-	      _rskipped.clear();
+	  chapter.enter = function () {
+	    addHouse();
+	  };
 
-	      _entitybboxes = {};
-	    } else {
-	      for (i = 0; i < entities.length; i++) {
-	        entity = entities[i];
-	        var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
+	  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);
+	  };
 
-	        for (j = 0; j < toRemove.length; j++) {
-	          _rdrawn.remove(toRemove[j]);
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	          _rskipped.remove(toRemove[j]);
-	        }
+	  return utilRebind(chapter, dispatch, 'on');
+	}
+
+	function uiIntroStartEditing(context, reveal) {
+	  var dispatch = dispatch$8('done', 'startEditing');
+	  var modalSelection = select(null);
+	  var chapter = {
+	    title: 'intro.startediting.title'
+	  };
+
+	  function showHelp() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        shortcuts();
 	      }
-	    } // Loop through all the entities to do some preprocessing
+	    });
+	  }
 
+	  function shortcuts() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showSave();
+	      }
+	    });
+	  }
 
-	    for (i = 0; i < entities.length; i++) {
-	      entity = entities[i];
-	      geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
+	  function showSave() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	      if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
-	        var hasDirections = entity.directions(graph, projection).length;
-	        var markerPadding;
+	    reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showStart();
+	      }
+	    });
+	  }
 
-	        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;
-	        }
+	  function showStart() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	        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
+	    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').call(_t.append('intro.startediting.start'));
+	    dispatch.call('startEditing');
+	  }
 
+	  chapter.enter = function () {
+	    showHelp();
+	  };
 
-	      if (geometry === 'vertex') {
-	        geometry = 'point';
-	      } // Determine which entities are label-able
+	  chapter.exit = function () {
+	    modalSelection.remove();
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	  };
 
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	      var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-	      var icon = preset && !shouldSkipIcon(preset) && preset.icon;
-	      if (!icon && !utilDisplayName(entity)) continue;
+	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 = {};
 
-	      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];
+	  var _currChapter;
 
-	        if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-	          labelable[k].push(entity);
-	          break;
+	  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]));
 	        }
 	      }
-	    }
-
-	    var positions = {
-	      point: [],
-	      line: [],
-	      area: []
-	    };
-	    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];
+	      selection.call(startIntro);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	      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;
+	  function startIntro(selection) {
+	    context.enter(modeBrowse(context)); // Save current map state
 
-	        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);
-	        }
+	    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)`)
 
-	        if (p) {
-	          if (geometry === 'vertex') {
-	            geometry = 'point';
-	          } // treat vertex like point
+	    context.ui().sidebar.expand();
+	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
+	    context.inIntro(true); // Load semi-real data used in intro
 
-	          p.classes = geometry + ' tag-' + labelStack[k][1];
-	          positions[geometry].push(p);
-	          labelled[geometry].push(entity);
-	        }
-	      }
+	    if (osm) {
+	      osm.toggle(false).reset();
 	    }
 
-	    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;
-	      });
-	    }
+	    context.history().reset();
+	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+	    context.history().checkpoint('initial'); // Setup imagery
 
-	    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 imagery = context.background().findSource(INTRO_IMAGERY);
 
-	      var bbox;
+	    if (imagery) {
+	      context.background().baseLayerSource(imagery);
+	    } else {
+	      context.background().bing();
+	    }
 
-	      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
-	        };
-	      }
+	    overlays.forEach(function (d) {
+	      return context.background().toggleOverlayLayer(d);
+	    }); // Setup data layers (only OSM)
 
-	      if (tryInsert([bbox], entity.id, true)) {
-	        return p;
+	    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..
 
-	    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
+	    corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
+
+	    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);
 
-	      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 (i < chapterFlow.length - 1) {
+	          var next = chapterFlow[i + 1];
+	          context.container().select("button.chapter-".concat(next)).classed('next', true);
+	        } // Store walkthrough progress..
 
-	      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);
+	        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..
 
-	        if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-	          continue;
-	        }
+	      var incomplete = utilArrayDifference(chapterFlow, progress);
 
-	        var isReverse = reverse(sub);
+	      if (!incomplete.length) {
+	        corePreferences('walkthrough_completed', 'yes');
+	      }
 
-	        if (isReverse) {
-	          sub = sub.reverse();
-	        }
+	      curtain.remove();
+	      navwrap.remove();
+	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
-	        var bboxes = [];
-	        var boxsize = (height + 2) / 2;
+	      if (osm) {
+	        osm.toggle(true).reset().caches(caches);
+	      }
 
-	        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
+	      context.history().reset().merge(Object.values(baseEntities));
+	      context.background().baseLayerSource(background);
+	      overlays.forEach(function (d) {
+	        return context.background().toggleOverlayLayer(d);
+	      });
 
-	          var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
+	      if (history) {
+	        context.history().fromJSON(history, false);
+	      }
 
-	          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)
-	            });
-	          }
-	        }
+	      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]);
 
-	        if (tryInsert(bboxes, entity.id, false)) {
-	          // accept this one
-	          return {
-	            'font-size': height + 2,
-	            lineString: lineString(sub),
-	            startOffset: offset + '%'
-	          };
-	        }
+	    function enterChapter(d3_event, newChapter) {
+	      if (_currChapter) {
+	        _currChapter.exit();
 	      }
 
-	      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);
-	      }
+	      context.enter(modeBrowse(context));
+	      _currChapter = newChapter;
 
-	      function lineString(points) {
-	        return 'M' + points.join('L');
-	      }
+	      _currChapter.enter();
 
-	      function subpath(points, from, to) {
-	        var sofar = 0;
-	        var start, end, i0, i1;
+	      buttons.classed('next', false).classed('active', function (d) {
+	        return d.title === _currChapter.title;
+	      });
+	    }
+	  }
 
-	        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;
+	  return intro;
+	}
 
-	          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 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'
+	  };
 
-	          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;
-	          }
+	  function update(selection) {
+	    var shownItems = [];
+	    var liveIssues = context.validator().getIssues({
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    });
 
-	          sofar += current;
-	        }
+	    if (liveIssues.length) {
+	      warningsItem.count = liveIssues.length;
+	      shownItems.push(warningsItem);
+	    }
 
-	        var result = points.slice(i0, i1);
-	        result.unshift(start);
-	        result.push(end);
-	        return result;
+	    if (corePreferences('validate-what') === 'all') {
+	      var resolvedIssues = context.validator().getResolvedIssues();
+
+	      if (resolvedIssues.length) {
+	        resolvedItem.count = resolvedIssues.length;
+	        shownItems.push(resolvedItem);
 	      }
 	    }
 
-	    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];
-	      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 = {};
+	    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
 
-	      if (picon) {
-	        // icon and label..
-	        if (addIcon()) {
-	          addLabel(iconSize + padding);
-	          return p;
-	        }
-	      } else {
-	        // label only..
-	        if (addLabel(0)) {
-	          return p;
-	        }
-	      }
+	        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').text(function (d) {
+	      return d.count.toString();
+	    });
+	  }
 
-	      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 function (selection) {
+	    update(selection);
+	    context.validator().on('validated.infobox', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	        if (tryInsert([bbox], entity.id + 'I', true)) {
-	          p.transform = 'translate(' + iconX + ',' + iconY + ')';
-	          return true;
-	        }
+	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)
 
-	        return false;
-	      }
+	    var _dMini; // dimensions of minimap
 
-	      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;
-	          }
-	        }
+	    var _cMini; // center pixel of minimap
 
-	        return false;
-	      }
-	    } // force insert a singular bounding box
-	    // singular box only, no array, id better be unique
 
+	    var _tStart; // transform at start of gesture
 
-	    function doInsert(bbox, id) {
-	      bbox.id = id;
-	      var oldbox = _entitybboxes[id];
 
-	      if (oldbox) {
-	        _rdrawn.remove(oldbox);
-	      }
+	    var _tCurr; // transform at most recent event
 
-	      _entitybboxes[id] = bbox;
 
-	      _rdrawn.insert(bbox);
+	    var _timeoutID;
+
+	    function zoomStarted() {
+	      if (_skipEvents) return;
+	      _tStart = _tCurr = projection.transform();
+	      _gesture = null;
 	    }
 
-	    function tryInsert(bboxes, id, saveSkipped) {
-	      var skipped = false;
+	    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;
 
-	      for (var i = 0; i < bboxes.length; i++) {
-	        var bbox = bboxes[i];
-	        bbox.id = id; // Check that label is visible
+	      if (!isZooming && !isPanning) {
+	        return; // no change
+	      } // lock in either zooming or panning, don't allow both in minimap.
 
-	        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;
-	        }
+	      if (!_gesture) {
+	        _gesture = isZooming ? 'zoom' : 'pan';
 	      }
 
-	      _entitybboxes[id] = bboxes;
+	      var tMini = projection.transform();
+	      var tX, tY, scale;
 
-	      if (skipped) {
-	        if (saveSkipped) {
-	          _rskipped.load(bboxes);
-	        }
+	      if (_gesture === 'zoom') {
+	        scale = k / tMini.k;
+	        tX = (_cMini[0] / scale - _cMini[0]) * scale;
+	        tY = (_cMini[1] / scale - _cMini[1]) * scale;
 	      } else {
-	        _rdrawn.load(bboxes);
+	        k = tMini.k;
+	        scale = 1;
+	        tX = x - tMini.x;
+	        tY = y - tMini.y;
 	      }
 
-	      return !skipped;
+	      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();
 	    }
 
-	    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
+	    function zoomEnded() {
+	      if (_skipEvents) return;
+	      if (_gesture !== 'pan') return;
+	      updateProjection();
+	      _gesture = null;
+	      context.map().center(projection.invert(_cMini)); // recenter main map..
+	    }
 
-	    drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-	    drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
+	    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();
 
-	    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
+	      if (_isTransformed) {
+	        utilSetTransform(tiles, 0, 0);
+	        utilSetTransform(viewport, 0, 0);
+	        _isTransformed = false;
+	      }
 
-	    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
+	      zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	      _skipEvents = true;
+	      wrap.call(zoom.transform, _tCurr);
+	      _skipEvents = false;
+	    }
 
-	    drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-	    drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
-	    layer.call(filterLabels);
-	  }
+	    function redraw() {
+	      clearTimeout(_timeoutID);
+	      if (_isHidden) return;
+	      updateProjection();
+	      var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-	  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
+	      tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+	      tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-	    if (mouse) {
-	      pad = 20;
-	      bbox = {
-	        minX: mouse[0] - pad,
-	        minY: mouse[1] - pad,
-	        maxX: mouse[0] + pad,
-	        maxY: mouse[1] + pad
-	      };
+	      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
 
-	      var nearMouse = _rdrawn.search(bbox).map(function (entity) {
-	        return entity.id;
+	      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));
+	        }
+	      }
+
+	      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
 
-	      ids.push.apply(ids, nearMouse);
-	    } // hide labels on selected nodes (they look weird when dragging / haloed)
+	      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 queueRedraw() {
+	      clearTimeout(_timeoutID);
+	      _timeoutID = setTimeout(function () {
+	        redraw();
+	      }, 750);
+	    }
 
-	    for (var i = 0; i < selectedIDs.length; i++) {
-	      var entity = graph.hasEntity(selectedIDs[i]);
+	    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);
 
-	      if (entity && entity.type === 'node') {
-	        ids.push(selectedIDs[i]);
+	      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();
+	        });
 	      }
 	    }
 
-	    layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
+	    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..
 
-	    var debug = selection.selectAll('.labels-group.debug');
-	    var gj = [];
+	    _dMini = [200, 150]; //utilGetDimensions(wrap);
 
-	    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]]]
-	      }] : [];
+	    _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);
+	  }
+
+	  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').call(_t.append('zoom_in_edit'));
+
+	    function disableTooHigh() {
+	      var canEdit = context.map().zoom() >= context.minEditableZoom();
+	      div.style('display', canEdit ? 'none' : 'block');
 	    }
 
-	    var box = debug.selectAll('.debug-mouse').data(gj); // exit
+	    context.map().on('move.notice', debounce(disableTooHigh, 500));
+	    disableTooHigh();
+	  };
+	}
 
-	    box.exit().remove(); // enter/update
+	function uiPhotoviewer(context) {
+	  var dispatch = dispatch$8('resize');
 
-	    box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
-	  }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  var throttleFilterLabels = throttle(filterLabels, 100);
+	  function photoviewer(selection) {
+	    selection.append('button').attr('class', 'thumb-hide').attr('title', _t('icons.close')).on('click', function () {
+	      if (services.streetside) {
+	        services.streetside.hideViewer(context);
+	      }
 
-	  drawLabels.observe = function (selection) {
-	    var listener = function listener() {
-	      throttleFilterLabels(selection);
-	    };
+	      if (services.mapillary) {
+	        services.mapillary.hideViewer(context);
+	      }
 
-	    selection.on('mousemove.hidelabels', listener);
-	    context.on('enter.hidelabels', listener);
-	  };
+	      if (services.kartaview) {
+	        services.kartaview.hideViewer(context);
+	      }
+	    }).append('div').call(svgIcon('#iD-icon-close'));
 
-	  drawLabels.off = function (selection) {
-	    throttleFilterLabels.cancel();
-	    selection.on('mousemove.hidelabels', null);
-	    context.on('enter.hidelabels', null);
-	  };
+	    function preventDefault(d3_event) {
+	      d3_event.preventDefault();
+	    }
 
-	  return drawLabels;
-	}
+	    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
+	    }));
 
-	var _layerEnabled$1 = false;
+	    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;
 
-	var _qaService$1;
+	      function startResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        var mapSize = context.map().dimensions();
 
-	function svgImproveOSM(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    return dispatch.call('change');
-	  }, 1000);
+	        if (resizeOnX) {
+	          var maxWidth = mapSize[0];
+	          var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+	          target.style('width', newWidth + 'px');
+	        }
 
-	  var minZoom = 12;
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	        if (resizeOnY) {
+	          var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
 
-	  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');
-	  } // Loosely-coupled improveOSM service for fetching issues
+	          var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+	          target.style('height', newHeight + 'px');
+	        }
 
+	        dispatch.call(eventName, target, utilGetDimensions(target, true));
+	      }
 
-	  function getService() {
-	    if (services.improveOSM && !_qaService$1) {
-	      _qaService$1 = services.improveOSM;
+	      function clamp(num, min, max) {
+	        return Math.max(min, Math.min(num, max));
+	      }
 
-	      _qaService$1.on('loaded', throttledRedraw);
-	    } else if (!services.improveOSM && _qaService$1) {
-	      _qaService$1 = null;
-	    }
+	      function stopResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // remove all the listeners we added
 
-	    return _qaService$1;
-	  } // Show the markers
+	        select(window).on('.' + eventName, null);
+	      }
 
+	      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);
 
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer.style('display', 'block');
+	        if (_pointerPrefix === 'pointer') {
+	          select(window).on('pointercancel.' + eventName, stopResize, false);
+	        }
+	      };
 	    }
-	  } // Immediately remove the markers and their touch targets
+	  }
 
+	  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)
 
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      drawLayer.style('display', 'none');
-	      drawLayer.selectAll('.qaItem.improveOSM').remove();
-	      touchLayer.selectAll('.qaItem.improveOSM').remove();
+	    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)];
+	      photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+	      dispatch.call('resize', photoviewer, setPhotoDimensions);
 	    }
-	  } // Enable the layer.  This shows the markers and transitions them to visible.
+	  };
 
+	  return utilRebind(photoviewer, dispatch, 'on');
+	}
 
-	  function layerOn() {
-	    editOn();
-	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-	      return dispatch.call('change');
+	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').call(_t.append('restore.heading'));
+	    introModal.append('div').attr('class', 'modal-section').append('p').call(_t.append('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();
 	    });
-	  } // 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');
+	    restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
+	    restore.append('div').call(_t.append('restore.restore'));
+	    var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
+	      context.history().clearSaved();
+	      modalSelection.remove();
 	    });
-	  } // Update the issue markers
+	    reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
+	    reset.append('div').call(_t.append('restore.reset'));
+	    restore.node().focus();
+	  };
+	}
 
+	function uiScale(context) {
+	  var projection = context.projection,
+	      isImperial = !_mainLocalizer.usesMetric(),
+	      maxLength = 180,
+	      tickHeight = 8;
 
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$1) return;
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = service ? service.getItems(projection) : [];
-	    var getTransform = svgPointTransform(projection); // Draw markers..
+	  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 markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
-	      return d.id;
-	    }); // exit
+	    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
 
-	    markers.exit().remove(); // enter
 
-	    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;
+	    for (i = 0; i < buckets.length; i++) {
+	      val = buckets[i];
 
-	      if (!picon) {
-	        return '';
+	      if (dist >= val) {
+	        scale.dist = Math.floor(dist / val) * val;
+	        break;
 	      } else {
-	        var isMaki = /^maki-/.test(picon);
-	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	        scale.dist = +dist.toFixed(2);
 	      }
-	    }); // update
+	    }
 
-	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-	      return d.id === selectedID;
-	    }).attr('transform', getTransform); // Draw targets..
+	    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;
+	  }
 
-	    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
+	  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').text(scale.text);
+	  }
 
-	    targets.exit().remove(); // enter/update
+	  return function (selection) {
+	    function switchUnits() {
+	      isImperial = !isImperial;
+	      selection.call(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);
+	    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);
+	    });
+	  };
+	}
 
-	    function sortY(a, b) {
-	      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.
+	function uiShortcuts(context) {
+	  var detected = utilDetect();
+	  var _activeTab = 0;
 
+	  var _modalSelection;
 
-	  function drawImproveOSM(selection) {
-	    var service = getService();
-	    var surface = context.surface();
+	  var _selection = select(null);
 
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	  var _dataShortcuts;
 
-	    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);
+	  function shortcutsModal(_modalSelection) {
+	    _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-	    if (_layerEnabled$1) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
-	      }
-	    }
-	  } // Toggles the layer on and off
+	    var content = _modalSelection.select('.content');
 
+	    content.append('div').attr('class', 'modal-section header').append('h2').call(_t.append('shortcuts.title'));
+	    _mainFileFetcher.get('shortcuts').then(function (data) {
+	      _dataShortcuts = data;
+	      content.call(render);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	  drawImproveOSM.enabled = function (val) {
-	    if (!arguments.length) return _layerEnabled$1;
-	    _layerEnabled$1 = val;
+	  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();
 
-	    if (_layerEnabled$1) {
-	      layerOn();
-	    } else {
-	      layerOff();
+	      var i = _dataShortcuts.indexOf(d);
 
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
+	      _activeTab = i;
+	      render(selection);
+	    });
+	    tabsEnter.append('span').html(function (d) {
+	      return _t.html(d.text);
+	    }); // Update
+
+	    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').text(function (d) {
+	        return uiCmd.display(d);
+	      });
+	      selection.append('span').text('+');
+	    });
+	    shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
+	      var arr = d.shortcuts;
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	      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
 
-	  drawImproveOSM.supported = function () {
-	    return !!getService();
-	  };
 
-	  return drawImproveOSM;
-	}
+	      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/);
 
-	var _layerEnabled$2 = false;
+	      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;
+	        });
+	      }
 
-	var _qaService$2;
+	      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').text(d.suffix);
+	      }
+	    });
+	    shortcutKeys.filter(function (d) {
+	      return d.gesture;
+	    }).each(function () {
+	      var selection = select(this);
+	      selection.append('span').text('+');
+	      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
 
-	function svgOsmose(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    return dispatch.call('change');
-	  }, 1000);
+	    wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+	      return i === _activeTab ? 'flex' : 'none';
+	    });
+	  }
 
-	  var minZoom = 12;
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	  return function (selection, show) {
+	    _selection = selection;
 
-	  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');
-	  } // Loosely-coupled osmose service for fetching issues
+	    if (show) {
+	      _modalSelection = uiModal(selection);
 
+	      _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();
 
-	  function getService() {
-	    if (services.osmose && !_qaService$2) {
-	      _qaService$2 = services.osmose;
+	            _modalSelection = null;
+	          }
+	        } else {
+	          _modalSelection = uiModal(_selection);
 
-	      _qaService$2.on('loaded', throttledRedraw);
-	    } else if (!services.osmose && _qaService$2) {
-	      _qaService$2 = null;
+	          _modalSelection.call(shortcutsModal);
+	        }
+	      });
 	    }
+	  };
+	}
 
-	    return _qaService$2;
-	  } // Show the markers
-
+	function uiDataHeader() {
+	  var _datum;
 
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer.style('display', 'block');
-	    }
-	  } // Immediately remove the markers and their touch targets
+	  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').call(_t.append('map_data.layers.custom.title'));
+	  }
 
+	  dataHeader.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      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.
+	  return dataHeader;
+	}
 
+	// 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
+	//   }, ...]
 
-	  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.
+	var _comboHideTimerID;
 
+	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;
 
-	  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');
-	    });
-	  } // Update the issue markers
+	  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;
+	      });
+	    }));
+	  };
 
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$2) return;
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = service ? service.getItems(projection) : [];
-	    var getTransform = svgPointTransform(projection); // Draw markers..
+	  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
 
-	    var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
-	      return d.id;
-	    }); // exit
+	        input.node().focus(); // focus the input as if it was clicked
 
-	    markers.exit().remove(); // enter
+	        mousedown(d3_event);
+	      }).on('mouseup.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
-	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
-	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	        mouseup(d3_event);
+	      });
 	    });
-	    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
 
-	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-	      return d.id === selectedID;
-	    }).attr('transform', getTransform); // Draw targets..
+	    function mousedown(d3_event) {
+	      if (d3_event.button !== 0) return; // left click only
 
-	    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
+	      if (input.classed('disabled')) return;
+	      _tDown = +new Date(); // clear selection
 
-	    targets.exit().remove(); // enter/update
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
-	    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);
+	      if (start !== end) {
+	        var val = utilGetSetValue(input);
+	        input.node().setSelectionRange(val.length, val.length);
+	        return;
+	      }
 
-	    function sortY(a, b) {
-	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+	      input.on('mouseup.combo-input', mouseup);
 	    }
-	  } // Draw the Osmose layer and schedule loading issues and updating markers.
 
+	    function mouseup(d3_event) {
+	      input.on('mouseup.combo-input', null);
+	      if (d3_event.button !== 0) return; // left click only
+
+	      if (input.classed('disabled')) return;
+	      if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
-	  function drawOsmose(selection) {
-	    var service = getService();
-	    var surface = context.surface();
+	      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.
 
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	      var combo = container.selectAll('.combobox');
 
-	    drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
-	    drawLayer.exit().remove();
-	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);
+	      if (combo.empty() || combo.datum() !== input.node()) {
+	        var tOrig = _tDown;
+	        window.setTimeout(function () {
+	          if (tOrig !== _tDown) return; // exit if user double clicked
 
-	    if (_layerEnabled$2) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
+	          fetchComboData('', function () {
+	            show();
+	            render();
+	          });
+	        }, 250);
 	      } else {
-	        editOff();
+	        hide();
 	      }
 	    }
-	  } // Toggles the layer on and off
 
+	    function focus() {
+	      fetchComboData(''); // prefetch values (may warm taginfo cache)
+	    }
 
-	  drawOsmose.enabled = function (val) {
-	    if (!arguments.length) return _layerEnabled$2;
-	    _layerEnabled$2 = val;
+	    function blur() {
+	      _comboHideTimerID = window.setTimeout(hide, 75);
+	    }
 
-	    if (_layerEnabled$2) {
-	      // 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
+	    function show() {
+	      hide(); // remove any existing
+
+	      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();
 	      });
-	    } else {
-	      layerOff();
+	      container.on('scroll.combo-scroll', render, true);
+	    }
 
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
+	    function hide() {
+	      if (_comboHideTimerID) {
+	        window.clearTimeout(_comboHideTimerID);
+	        _comboHideTimerID = undefined;
 	      }
-	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	      container.selectAll('.combobox').remove();
+	      container.on('scroll.combo-scroll', null);
+	    }
 
-	  drawOsmose.supported = function () {
-	    return !!getService();
-	  };
+	    function keydown(d3_event) {
+	      var shown = !container.selectAll('.combobox').empty();
+	      var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-	  return drawOsmose;
-	}
+	      switch (d3_event.keyCode) {
+	        case 8: // ⌫ Backspace
 
-	function svgStreetside(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    dispatch.call('change');
-	  }, 1000);
+	        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 minZoom = 14;
-	  var minMarkerZoom = 16;
-	  var minViewfieldZoom = 18;
-	  var layer = select(null);
-	  var _viewerYaw = 0;
-	  var _selectedSequence = null;
+	        case 9:
+	          // ⇥ Tab
+	          accept();
+	          break;
 
-	  var _streetside;
-	  /**
-	   * init().
-	   */
+	        case 13:
+	          // ↩ Return
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          break;
 
+	        case 38:
+	          // ↑ Up arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
-	  function init() {
-	    if (svgStreetside.initialized) return; // run once
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
-	    svgStreetside.enabled = false;
-	    svgStreetside.initialized = true;
-	  }
-	  /**
-	   * getService().
-	   */
+	          nav(-1);
+	          break;
 
+	        case 40:
+	          // ↓ Down arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
-	  function getService() {
-	    if (services.streetside && !_streetside) {
-	      _streetside = services.streetside;
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
-	      _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
-	    } else if (!services.streetside && _streetside) {
-	      _streetside = null;
+	          nav(+1);
+	          break;
+	      }
 	    }
 
-	    return _streetside;
-	  }
-	  /**
-	   * showLayer().
-	   */
+	    function keyup(d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 27:
+	          // ⎋ Escape
+	          cancel();
+	          break;
+
+	        case 13:
+	          // ↩ Return
+	          accept();
+	          break;
+	      }
+	    } // Called whenever the input value is changed (e.g. on typing)
 
 
-	  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().
-	   */
+	    function change() {
+	      fetchComboData(value(), function () {
+	        _selected = null;
+	        var val = input.property('value');
 
+	        if (_suggestions.length) {
+	          if (input.property('selectionEnd') === val.length) {
+	            _selected = tryAutocomplete();
+	          }
 
-	  function hideLayer() {
-	    throttledRedraw.cancel();
-	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-	  }
-	  /**
-	   * editOn().
-	   */
+	          if (!_selected) {
+	            _selected = val;
+	          }
+	        }
 
+	        if (val.length) {
+	          var combo = container.selectAll('.combobox');
 
-	  function editOn() {
-	    layer.style('display', 'block');
-	  }
-	  /**
-	   * editOff().
-	   */
+	          if (combo.empty()) {
+	            show();
+	          }
+	        } else {
+	          hide();
+	        }
 
+	        render();
+	      });
+	    } // Called when the user presses up/down arrows to navigate the list
 
-	  function editOff() {
-	    layer.selectAll('.viewfield-group').remove();
-	    layer.style('display', 'none');
-	  }
-	  /**
-	   * click() Handles 'bubble' point click event.
-	   */
 
+	    function nav(dir) {
+	      if (_suggestions.length) {
+	        // try to determine previously selected index..
+	        var index = -1;
 
-	  function click(d3_event, d) {
-	    var service = getService();
-	    if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
+	        for (var i = 0; i < _suggestions.length; i++) {
+	          if (_selected && _suggestions[i].value === _selected) {
+	            index = i;
+	            break;
+	          }
+	        } // pick new _selected
 
-	    if (d.sequenceKey !== _selectedSequence) {
-	      _viewerYaw = 0; // reset
+
+	        index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+	        _selected = _suggestions[index].value;
+	        input.property('value', _selected);
+	      }
+
+	      render();
+	      ensureVisible();
 	    }
 
-	    _selectedSequence = d.sequenceKey;
-	    service.ensureViewerLoaded(context).then(function () {
-	      service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
-	    });
-	    context.map().centerEase(d.loc);
-	  }
-	  /**
-	   * mouseover().
-	   */
+	    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
 
-	  function mouseover(d3_event, d) {
-	    var service = getService();
-	    if (service) service.setStyles(context, d);
-	  }
-	  /**
-	   * mouseout().
-	   */
 
+	      var selected = combo.selectAll('.combobox-option.selected').node();
 
-	  function mouseout() {
-	    var service = getService();
-	    if (service) service.setStyles(context, null);
-	  }
-	  /**
-	   * transform().
-	   */
+	      if (selected) {
+	        selected.scrollIntoView({
+	          behavior: 'smooth',
+	          block: 'nearest'
+	        });
+	      }
+	    }
 
+	    function value() {
+	      var value = input.property('value');
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
-	  function transform(d) {
-	    var t = svgPointTransform(projection)(d);
-	    var rot = d.ca + _viewerYaw;
+	      if (start && end) {
+	        value = value.substring(0, start);
+	      }
 
-	    if (rot) {
-	      t += ' rotate(' + Math.floor(rot) + ',0,0)';
+	      return value;
 	    }
 
-	    return t;
-	  }
+	    function fetchComboData(v, cb) {
+	      _cancelFetch = false;
 
-	  function viewerChanged() {
-	    var service = getService();
-	    if (!service) return;
-	    var viewer = service.viewer();
-	    if (!viewer) return; // update viewfield rotation
+	      _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;
+	        });
 
-	    _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
-	    // e.g. during drags or easing.
+	        if (cb) {
+	          cb();
+	        }
+	      });
+	    }
 
-	    if (context.map().isTransformed()) return;
-	    layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
-	  }
+	    function tryAutocomplete() {
+	      if (!_canAutocomplete) return;
+	      var val = _caseSensitive ? value() : value().toLowerCase();
+	      if (!val) return; // Don't autocomplete if user is typing a number - #4935
 
-	  context.photos().on('change.streetside', update);
+	      if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+	      var bestIndex = -1;
 
-	  function filterBubbles(bubbles) {
-	    var fromDate = context.photos().fromDate();
-	    var toDate = context.photos().toDate();
-	    var usernames = context.photos().usernames();
+	      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 (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      bubbles = bubbles.filter(function (bubble) {
-	        return new Date(bubble.captured_at).getTime() >= fromTimestamp;
-	      });
-	    }
+	        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;
+	        }
+	      }
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      bubbles = bubbles.filter(function (bubble) {
-	        return new Date(bubble.captured_at).getTime() <= toTimestamp;
-	      });
+	      if (bestIndex !== -1) {
+	        var bestVal = _suggestions[bestIndex].value;
+	        input.property('value', bestVal);
+	        input.node().setSelectionRange(val.length, bestVal.length);
+	        return bestVal;
+	      }
 	    }
 
-	    if (usernames) {
-	      bubbles = bubbles.filter(function (bubble) {
-	        return usernames.indexOf(bubble.captured_by) !== -1;
+	    function render() {
+	      if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+	        hide();
+	        return;
+	      }
+
+	      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
 
-	    return bubbles;
-	  }
+	      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 filterSequences(sequences) {
-	    var fromDate = context.photos().fromDate();
-	    var toDate = context.photos().toDate();
-	    var usernames = context.photos().usernames();
 
-	    if (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      sequences = sequences.filter(function (sequences) {
-	        return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
-	      });
-	    }
+	    function accept(d3_event, d) {
+	      _cancelFetch = true;
+	      var thiz = input.node();
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      sequences = sequences.filter(function (sequences) {
-	        return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
-	      });
-	    }
+	      if (d) {
+	        // user clicked on a suggestion
+	        utilGetSetValue(input, d.value); // replace field contents
+
+	        utilTriggerEvent(input, 'change');
+	      } // clear (and keep) selection
 
-	    if (usernames) {
-	      sequences = sequences.filter(function (sequences) {
-	        return usernames.indexOf(sequences.properties.captured_by) !== -1;
-	      });
-	    }
 
-	    return sequences;
-	  }
-	  /**
-	   * update().
-	   */
+	      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.
 
 
-	  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 = [];
+	    function cancel() {
+	      _cancelFetch = true;
+	      var thiz = input.node(); // clear (and remove) selection, and replace field contents
 
-	    if (context.photos().showsPanoramic()) {
-	      sequences = service ? service.sequences(projection) : [];
-	      bubbles = service && showMarkers ? service.bubbles(projection) : [];
-	      sequences = filterSequences(sequences);
-	      bubbles = filterBubbles(bubbles);
+	      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();
 	    }
+	  };
 
-	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-	      return d.properties.key;
-	    }); // exit
+	  combobox.canAutocomplete = function (val) {
+	    if (!arguments.length) return _canAutocomplete;
+	    _canAutocomplete = val;
+	    return combobox;
+	  };
 
-	    traces.exit().remove(); // enter/update
+	  combobox.caseSensitive = function (val) {
+	    if (!arguments.length) return _caseSensitive;
+	    _caseSensitive = val;
+	    return combobox;
+	  };
 
-	    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
+	  combobox.data = function (val) {
+	    if (!arguments.length) return _data;
+	    _data = val;
+	    return combobox;
+	  };
 
-	    groups.exit().remove(); // enter
+	  combobox.fetcher = function (val) {
+	    if (!arguments.length) return _fetcher;
+	    _fetcher = val;
+	    return combobox;
+	  };
 
-	    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
+	  combobox.minItems = function (val) {
+	    if (!arguments.length) return _minItems;
+	    _minItems = val;
+	    return combobox;
+	  };
 
-	    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
+	  combobox.itemsMouseEnter = function (val) {
+	    if (!arguments.length) return _mouseEnterHandler;
+	    _mouseEnterHandler = val;
+	    return combobox;
+	  };
 
-	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+	  combobox.itemsMouseLeave = function (val) {
+	    if (!arguments.length) return _mouseLeaveHandler;
+	    _mouseLeaveHandler = val;
+	    return combobox;
+	  };
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
+	  return utilRebind(combobox, dispatch, 'on');
+	}
 
-	      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
-	   */
+	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);
+	};
 
+	function uiDisclosure(context, key, expandedDefault) {
+	  var dispatch = dispatch$8('toggled');
 
-	  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);
+	  var _expanded;
 
-	    if (enabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        update();
-	        service.loadBubbles(projection);
-	      } else {
-	        editOff();
-	      }
-	    }
-	  }
-	  /**
-	   * drawImages.enabled().
-	   */
+	  var _label = utilFunctor('');
 
+	  var _updatePreference = true;
 
-	  drawImages.enabled = function (_) {
-	    if (!arguments.length) return svgStreetside.enabled;
-	    svgStreetside.enabled = _;
+	  var _content = function _content() {};
 
-	    if (svgStreetside.enabled) {
-	      showLayer();
-	    } else {
-	      hideLayer();
+	  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';
 	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
-	  /**
-	   * drawImages.supported().
-	   */
-
-
-	  drawImages.supported = function () {
-	    return !!getService();
-	  };
+	    var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-	  init();
-	  return drawImages;
-	}
+	    var hideToggleEnter = hideToggle.enter().append('h3').append('a').attr('role', 'button').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
 
-	function svgMapillaryImages(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    dispatch.call('change');
-	  }, 1000);
+	    hideToggle = hideToggleEnter.merge(hideToggle);
+	    hideToggle.on('click', toggle).attr('title', _t("icons.".concat(_expanded ? 'collapse' : 'expand'))).attr('aria-expanded', _expanded).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 minZoom = 12;
-	  var minMarkerZoom = 16;
-	  var minViewfieldZoom = 18;
-	  var layer = select(null);
+	    wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
-	  var _mapillary;
+	    if (_expanded) {
+	      wrap.call(_content);
+	    }
 
-	  var viewerCompassAngle;
+	    function toggle(d3_event) {
+	      d3_event.preventDefault();
+	      _expanded = !_expanded;
 
-	  function init() {
-	    if (svgMapillaryImages.initialized) return; // run once
+	      if (_updatePreference) {
+	        corePreferences('disclosure.' + key + '.expanded', _expanded);
+	      }
 
-	    svgMapillaryImages.enabled = false;
-	    svgMapillaryImages.initialized = true;
-	  }
+	      hideToggle.classed('expanded', _expanded).attr('aria-expanded', _expanded).attr('title', _t("icons.".concat(_expanded ? 'collapse' : 'expand')));
+	      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));
 
-	  function getService() {
-	    if (services.mapillary && !_mapillary) {
-	      _mapillary = services.mapillary;
+	      if (_expanded) {
+	        wrap.call(_content);
+	      }
 
-	      _mapillary.event.on('loadedImages', throttledRedraw);
-	    } else if (!services.mapillary && _mapillary) {
-	      _mapillary = null;
+	      dispatch.call('toggled', this, _expanded);
 	    }
+	  };
 
-	    return _mapillary;
-	  }
+	  disclosure.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return disclosure;
+	  };
 
-	  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');
-	    });
-	  }
+	  disclosure.expanded = function (val) {
+	    if (!arguments.length) return _expanded;
+	    _expanded = val;
+	    return disclosure;
+	  };
 
-	  function hideLayer() {
-	    throttledRedraw.cancel();
-	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-	  }
+	  disclosure.updatePreference = function (val) {
+	    if (!arguments.length) return _updatePreference;
+	    _updatePreference = val;
+	    return disclosure;
+	  };
 
-	  function editOn() {
-	    layer.style('display', 'block');
-	  }
+	  disclosure.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return disclosure;
+	  };
 
-	  function editOff() {
-	    layer.selectAll('.viewfield-group').remove();
-	    layer.style('display', 'none');
-	  }
+	  return utilRebind(disclosure, dispatch, 'on');
+	}
 
-	  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);
-	  }
+	// Can be labeled and collapsible.
 
-	  function mouseover(d) {
-	    var service = getService();
-	    if (service) service.setStyles(context, d);
-	  }
+	function uiSection(id, context) {
+	  var _classes = utilFunctor('');
 
-	  function mouseout() {
-	    var service = getService();
-	    if (service) service.setStyles(context, null);
-	  }
+	  var _shouldDisplay;
 
-	  function transform(d) {
-	    var t = svgPointTransform(projection)(d);
+	  var _content;
 
-	    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)';
-	    }
+	  var _disclosure;
 
-	    return t;
-	  }
+	  var _label;
 
-	  context.photos().on('change.mapillary_images', update);
+	  var _expandedByDefault = utilFunctor(true);
 
-	  function filterImages(images) {
-	    var showsPano = context.photos().showsPanoramic();
-	    var showsFlat = context.photos().showsFlat();
-	    var fromDate = context.photos().fromDate();
-	    var toDate = context.photos().toDate();
-	    var usernames = context.photos().usernames();
+	  var _disclosureContent;
 
-	    if (!showsPano || !showsFlat) {
-	      images = images.filter(function (image) {
-	        if (image.pano) return showsPano;
-	        return showsFlat;
-	      });
-	    }
+	  var _disclosureExpanded;
 
-	    if (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      images = images.filter(function (image) {
-	        return new Date(image.captured_at).getTime() >= fromTimestamp;
-	      });
-	    }
+	  var _containerSelection = select(null);
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      images = images.filter(function (image) {
-	        return new Date(image.captured_at).getTime() <= toTimestamp;
-	      });
-	    }
+	  var section = {
+	    id: id
+	  };
 
-	    if (usernames) {
-	      images = images.filter(function (image) {
-	        return usernames.indexOf(image.captured_by) !== -1;
-	      });
-	    }
+	  section.classes = function (val) {
+	    if (!arguments.length) return _classes;
+	    _classes = utilFunctor(val);
+	    return section;
+	  };
 
-	    return images;
-	  }
+	  section.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return section;
+	  };
 
-	  function filterSequences(sequences, service) {
-	    var showsPano = context.photos().showsPanoramic();
-	    var showsFlat = context.photos().showsFlat();
-	    var fromDate = context.photos().fromDate();
-	    var toDate = context.photos().toDate();
-	    var usernames = context.photos().usernames();
+	  section.expandedByDefault = function (val) {
+	    if (!arguments.length) return _expandedByDefault;
+	    _expandedByDefault = utilFunctor(val);
+	    return section;
+	  };
 
-	    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;
+	  section.shouldDisplay = function (val) {
+	    if (!arguments.length) return _shouldDisplay;
+	    _shouldDisplay = utilFunctor(val);
+	    return section;
+	  };
 
-	          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);
+	  section.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return section;
+	  };
 
-	              if (image && image.hasOwnProperty('pano')) {
-	                if (image.pano) return showsPano;
-	                return showsFlat;
-	              }
-	            }
-	          }
-	        }
+	  section.disclosureContent = function (val) {
+	    if (!arguments.length) return _disclosureContent;
+	    _disclosureContent = val;
+	    return section;
+	  };
 
-	        return false;
-	      });
-	    }
+	  section.disclosureExpanded = function (val) {
+	    if (!arguments.length) return _disclosureExpanded;
+	    _disclosureExpanded = val;
+	    return section;
+	  }; // may be called multiple times
 
-	    if (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      sequences = sequences.filter(function (sequence) {
-	        return new Date(sequence.properties.captured_at).getTime() >= fromTimestamp;
-	      });
-	    }
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      sequences = sequences.filter(function (sequence) {
-	        return new Date(sequence.properties.captured_at).getTime() <= toTimestamp;
-	      });
-	    }
+	  section.render = function (selection) {
+	    _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-	    if (usernames) {
-	      sequences = sequences.filter(function (sequence) {
-	        return usernames.indexOf(sequence.properties.username) !== -1;
-	      });
-	    }
+	    var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-	    return sequences;
-	  }
+	    _containerSelection = sectionEnter.merge(_containerSelection);
 
-	  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);
-	    service.filterViewer(context);
-	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-	      return d.properties.key;
-	    }); // exit
+	    _containerSelection.call(renderContent);
+	  };
 
-	    traces.exit().remove(); // enter/update
+	  section.reRender = function () {
+	    _containerSelection.call(renderContent);
+	  };
 
-	    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
+	  section.selection = function () {
+	    return _containerSelection;
+	  };
 
-	    groups.exit().remove(); // enter
+	  section.disclosure = function () {
+	    return _disclosure;
+	  }; // may be called multiple times
 
-	    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__.pano;
-	    }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+	  function renderContent(selection) {
+	    if (_shouldDisplay) {
+	      var shouldDisplay = _shouldDisplay();
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
+	      selection.classed('hide', !shouldDisplay);
 
-	      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';
+	      if (!shouldDisplay) {
+	        selection.html('');
+	        return;
 	      }
 	    }
-	  }
 
-	  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 (_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);
+	      }
 
-	    if (enabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        update();
-	        service.loadImages(projection);
-	      } else {
-	        editOff();
+	      if (_disclosureExpanded !== undefined) {
+	        _disclosure.expanded(_disclosureExpanded);
+
+	        _disclosureExpanded = undefined;
 	      }
-	    }
-	  }
 
-	  drawImages.enabled = function (_) {
-	    if (!arguments.length) return svgMapillaryImages.enabled;
-	    svgMapillaryImages.enabled = _;
+	      selection.call(_disclosure);
+	      return;
+	    }
 
-	    if (svgMapillaryImages.enabled) {
-	      showLayer();
-	    } else {
-	      hideLayer();
+	    if (_content) {
+	      selection.call(_content);
 	    }
+	  }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	  return section;
+	}
 
-	  drawImages.supported = function () {
-	    return !!getService();
-	  };
+	// {
+	//   key: 'string',     // required
+	//   value: 'string'    // optional
+	// }
+	//   -or-
+	// {
+	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	// }
+	//
 
-	  init();
-	  return drawImages;
-	}
+	function uiTagReference(what) {
+	  var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+	  var tagReference = {};
+
+	  var _button = select(null);
 
-	function svgMapillaryPosition(projection, context) {
-	  var throttledRedraw = throttle(function () {
-	    update();
-	  }, 1000);
+	  var _body = select(null);
 
-	  var minZoom = 12;
-	  var minViewfieldZoom = 18;
-	  var layer = select(null);
+	  var _loaded;
 
-	  var _mapillary;
+	  var _showing;
 
-	  var viewerCompassAngle;
+	  function load() {
+	    if (!wikibase) return;
 
-	  function init() {
-	    if (svgMapillaryPosition.initialized) return; // run once
+	    _button.classed('tag-reference-loading', true);
 
-	    svgMapillaryPosition.initialized = true;
+	    wikibase.getDocs(what, gotDocs);
 	  }
 
-	  function getService() {
-	    if (services.mapillary && !_mapillary) {
-	      _mapillary = services.mapillary;
+	  function gotDocs(err, docs) {
+	    _body.html('');
 
-	      _mapillary.event.on('nodeChanged', throttledRedraw);
+	    if (!docs || !docs.title) {
+	      _body.append('p').attr('class', 'tag-reference-description').call(_t.append('inspector.no_documentation_key'));
 
-	      _mapillary.event.on('bearingChanged', function (e) {
-	        viewerCompassAngle = e;
-	        if (context.map().isTransformed()) return;
-	        layer.selectAll('.viewfield-group.currentView').filter(function (d) {
-	          return d.pano;
-	        }).attr('transform', transform);
+	      done();
+	      return;
+	    }
+
+	    if (docs.imageURL) {
+	      _body.append('img').attr('class', 'tag-reference-wiki-image').attr('alt', docs.description).attr('src', docs.imageURL).on('load', function () {
+	        done();
+	      }).on('error', function () {
+	        select(this).remove();
+	        done();
 	      });
-	    } else if (!services.mapillary && _mapillary) {
-	      _mapillary = null;
+	    } else {
+	      done();
 	    }
 
-	    return _mapillary;
-	  }
+	    var tagReferenceDescription = _body.append('p').attr('class', 'tag-reference-description').append('span');
 
-	  function editOn() {
-	    layer.style('display', 'block');
-	  }
+	    if (docs.description) {
+	      tagReferenceDescription = tagReferenceDescription.attr('class', 'localized-text').attr('lang', docs.descriptionLocaleCode || 'und').text(docs.description);
+	    } else {
+	      tagReferenceDescription = tagReferenceDescription.call(_t.append('inspector.no_documentation_key'));
+	    }
 
-	  function editOff() {
-	    layer.selectAll('.viewfield-group').remove();
-	    layer.style('display', 'none');
-	  }
+	    tagReferenceDescription.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'));
 
-	  function transform(d) {
-	    var t = svgPointTransform(projection)(d);
+	    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').call(_t.append(docs.wiki.text));
+	    } // Add link to info about "good changeset comments" - #2923
 
-	    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;
+	    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').call(_t.append('commit.about_changeset_comments'));
+	    }
 	  }
 
-	  function update() {
-	    var z = ~~context.map().zoom();
-	    var showViewfields = z >= minViewfieldZoom;
-	    var service = getService();
-	    var node = service && service.getActiveImage();
-	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(node ? [node] : [], function (d) {
-	      return d.key;
-	    }); // exit
+	  function done() {
+	    _loaded = true;
 
-	    groups.exit().remove(); // enter
+	    _button.classed('tag-reference-loading', false);
 
-	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
-	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+	    _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-	    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').classed('pano', function () {
-	      return this.parentNode.__data__.pano;
-	    }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+	    _showing = true;
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	      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';
+	      if (iconUse.attr('href') === '#iD-icon-info') {
+	        iconUse.attr('href', '#iD-icon-info-filled');
 	      }
-	    }
+	    });
 	  }
 
-	  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);
+	  function hide() {
+	    _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	      _body.classed('expanded', false);
+	    });
 
-	    if (service && ~~context.map().zoom() >= minZoom) {
-	      editOn();
-	      update();
-	    } else {
-	      editOff();
-	    }
+	    _showing = false;
+
+	    _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');
+	      }
+	    });
 	  }
 
-	  drawImages.enabled = function () {
-	    update();
-	    return this;
+	  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);
+
+	    _button.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
+
+	      if (_showing) {
+	        hide();
+	      } else if (_loaded) {
+	        done();
+	      } else {
+	        load();
+	      }
+	    });
 	  };
 
-	  drawImages.supported = function () {
-	    return !!getService();
+	  tagReference.body = function (selection) {
+	    var itemID = what.qid || what.key + '-' + (what.value || '');
+	    _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+	      return d;
+	    });
+
+	    _body.exit().remove();
+
+	    _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
+
+	    if (_showing === false) {
+	      hide();
+	    }
 	  };
 
-	  init();
-	  return drawImages;
-	}
+	  tagReference.showing = function (val) {
+	    if (!arguments.length) return _showing;
+	    _showing = val;
+	    return tagReference;
+	  };
 
-	function svgMapillarySigns(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    dispatch.call('change');
-	  }, 1000);
+	  return tagReference;
+	}
 
-	  var minZoom = 12;
-	  var layer = select(null);
+	// It borrows some code from uiHelp
 
-	  var _mapillary;
+	function uiFieldHelp(context, fieldName) {
+	  var fieldHelp = {};
 
-	  function init() {
-	    if (svgMapillarySigns.initialized) return; // run once
+	  var _inspector = select(null);
 
-	    svgMapillarySigns.enabled = false;
-	    svgMapillarySigns.initialized = true;
-	  }
+	  var _wrap = select(null);
 
-	  function getService() {
-	    if (services.mapillary && !_mapillary) {
-	      _mapillary = services.mapillary;
+	  var _body = select(null);
 
-	      _mapillary.event.on('loadedSigns', throttledRedraw);
-	    } else if (!services.mapillary && _mapillary) {
-	      _mapillary = 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']]]
+	  };
+	  var fieldHelpHeadings = {};
+	  var replacements = {
+	    distField: {
+	      html: _t.html('restriction.controls.distance')
+	    },
+	    viaField: {
+	      html: _t.html('restriction.controls.via')
+	    },
+	    fromShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow from')
+	    },
+	    allowShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow allow')
+	    },
+	    restrictShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow restrict')
+	    },
+	    onlyShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow only')
+	    },
+	    allowTurn: {
+	      html: icon('#iD-turn-yes', 'inline turn')
+	    },
+	    restrictTurn: {
+	      html: icon('#iD-turn-no', 'inline turn')
+	    },
+	    onlyTurn: {
+	      html: icon('#iD-turn-only', 'inline turn')
 	    }
+	  }; // For each section, squash all the texts into a single markdown document
 
-	    return _mapillary;
-	  }
+	  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?
 
-	  function showLayer() {
-	    var service = getService();
-	    if (!service) return;
-	    service.loadSignResources(context);
-	    editOn();
-	  }
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-	  function hideLayer() {
-	    throttledRedraw.cancel();
-	    editOff();
-	  }
+	      return all + hhh + _t.html(subkey, replacements) + '\n\n';
+	    }, '');
+	    return {
+	      key: helpkey,
+	      title: _t.html(helpkey + '.title'),
+	      html: marked_1(text.trim())
+	    };
+	  });
 
-	  function editOn() {
-	    layer.style('display', 'block');
+	  function show() {
+	    updatePosition();
+
+	    _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
 	  }
 
-	  function editOff() {
-	    layer.selectAll('.icon-sign').remove();
-	    layer.style('display', 'none');
+	  function hide() {
+	    _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+	      _body.classed('hide', true);
+	    });
 	  }
 
-	  function click(d3_event, d) {
-	    var service = getService();
-	    if (!service) return;
-	    context.map().centerEase(d.loc);
-	    var selectedImageKey = service.getSelectedImageKey();
-	    var imageKey;
-	    var highlightedDetection; // Pick one of the images the sign was detected in,
-	    // preference given to an image already selected.
+	  function clickHelp(index) {
+	    var d = docs[index];
+	    var tkeys = fieldHelpKeys[fieldName][index][1];
 
-	    d.detections.forEach(function (detection) {
-	      if (!imageKey || selectedImageKey === detection.image_key) {
-	        imageKey = detection.image_key;
-	        highlightedDetection = detection;
-	      }
+	    _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+	      return i === index;
 	    });
 
-	    if (imageKey === selectedImageKey) {
-	      service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
-	    } else {
-	      service.ensureViewerLoaded(context).then(function () {
-	        service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
-	      });
+	    var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
+
+
+	    content.selectAll('p').attr('class', function (d, i) {
+	      return tkeys[i];
+	    }); // 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'));
+	    } 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'));
 	    }
 	  }
 
-	  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
+	  fieldHelp.button = function (selection) {
+	    if (_body.empty()) return;
+	    var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-	    signs.exit().remove(); // enter
+	    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();
 
-	    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;
+	      if (_body.classed('hide')) {
+	        show();
+	      } else {
+	        hide();
+	      }
 	    });
-	    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;
-	      }
+	  function updatePosition() {
+	    var wrap = _wrap.node();
 
-	      return -1;
-	    });
-	  }
+	    var inspector = _inspector.node();
 
-	  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);
+	    var wRect = wrap.getBoundingClientRect();
+	    var iRect = inspector.getBoundingClientRect();
 
-	    if (enabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        update();
-	        service.loadSigns(projection);
-	        service.showSignDetections(true);
-	      } else {
-	        editOff();
-	      }
-	    } else if (service) {
-	      service.showSignDetections(false);
-	    }
+	    _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
 	  }
 
-	  drawSigns.enabled = function (_) {
-	    if (!arguments.length) return svgMapillarySigns.enabled;
-	    svgMapillarySigns.enabled = _;
+	  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
 
-	    if (svgMapillarySigns.enabled) {
-	      showLayer();
-	    } else {
-	      hideLayer();
-	    }
+	    _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+	    if (_inspector.empty()) return;
+	    _body = _inspector.selectAll('.field-help-body').data([0]);
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	    var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
-	  drawSigns.supported = function () {
-	    return !!getService();
+
+	    var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
+	    titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').call(_t.append('help.field.' + fieldName + '.title'));
+	    titleEnter.append('button').attr('class', 'fr close').attr('title', _t('icons.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);
 	  };
 
-	  init();
-	  return drawSigns;
+	  return fieldHelp;
 	}
 
-	function svgMapillaryMapFeatures(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    dispatch.call('change');
-	  }, 1000);
+	function uiFieldCheck(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var options = field.options;
+	  var values = [];
+	  var texts = [];
 
-	  var minZoom = 12;
-	  var layer = select(null);
+	  var _tags;
 
-	  var _mapillary;
+	  var input = select(null);
+	  var text = select(null);
+	  var label = select(null);
+	  var reverser = select(null);
 
-	  function init() {
-	    if (svgMapillaryMapFeatures.initialized) return; // run once
+	  var _impliedYes;
 
-	    svgMapillaryMapFeatures.enabled = false;
-	    svgMapillaryMapFeatures.initialized = true;
-	  }
+	  var _entityIDs = [];
 
-	  function getService() {
-	    if (services.mapillary && !_mapillary) {
-	      _mapillary = services.mapillary;
+	  var _value;
 
-	      _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-	    } else if (!services.mapillary && _mapillary) {
-	      _mapillary = null;
+	  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')];
 
-	    return _mapillary;
-	  }
+	    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 showLayer() {
-	    var service = getService();
-	    if (!service) return;
-	    service.loadObjectResources(context);
-	    editOn();
-	  }
 
-	  function hideLayer() {
-	    throttledRedraw.cancel();
-	    editOff();
-	  }
+	  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
 
-	  function editOn() {
-	    layer.style('display', 'block');
+	    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 editOff() {
-	    layer.selectAll('.icon-map-feature').remove();
-	    layer.style('display', 'none');
+	  function reverserHidden() {
+	    if (!context.container().select('div.inspector-hover').empty()) return true;
+	    return !(_value === 'yes' || _impliedYes && !_value);
 	  }
 
-	  function click(d3_event, d) {
-	    var service = getService();
-	    if (!service) return;
-	    context.map().centerEase(d.loc);
-	    var selectedImageKey = service.getSelectedImageKey();
-	    var imageKey;
-	    var highlightedDetection; // Pick one of the images the map feature was detected in,
-	    // preference given to an image already selected.
+	  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('').call(_t.append('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
+	    return selection;
+	  }
 
-	    d.detections.forEach(function (detection) {
-	      if (!imageKey || selectedImageKey === detection.image_key) {
-	        imageKey = detection.image_key;
-	        highlightedDetection = detection;
-	      }
-	    });
+	  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 (imageKey === selectedImageKey) {
-	      service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
-	    } else {
-	      service.ensureViewerLoaded(context).then(function () {
-	        service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
-	      });
+	    if (field.type === 'onewayCheck') {
+	      enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
 	    }
-	  }
 
-	  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
+	    label = label.merge(enter);
+	    input = label.selectAll('input');
+	    text = label.selectAll('span.value');
+	    input.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      var t = {};
 
-	    mapFeatures.exit().remove(); // enter
+	      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)
 
-	    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';
+
+	      if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+	        t[field.key] = values[0];
 	      }
 
-	      return '#' + d.value;
-	    });
-	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
+	      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
 
-	    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;
+	        context.validator().validate();
+	        select(this).call(reverserSetText);
 	      });
+	    }
+	  };
 
-	      if (aSelected === bSelected) {
-	        return b.loc[1] - a.loc[1]; // sort Y
-	      } else if (aSelected) {
-	        return 1;
-	      }
+	  check.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return check;
+	  };
 
-	      return -1;
-	    });
-	  }
+	  check.tags = function (tags) {
+	    _tags = tags;
 
-	  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);
+	    function isChecked(val) {
+	      return val !== 'no' && val !== '' && val !== undefined && val !== null;
+	    }
 
-	    if (enabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        update();
-	        service.loadMapFeatures(projection);
-	        service.showFeatureDetections(true);
-	      } else {
-	        editOff();
-	      }
-	    } else if (service) {
-	      service.showFeatureDetections(false);
+	    function textFor(val) {
+	      if (val === '') val = undefined;
+	      var index = values.indexOf(val);
+	      return index !== -1 ? texts[index] : '"' + val + '"';
 	    }
-	  }
 
-	  drawMapFeatures.enabled = function (_) {
-	    if (!arguments.length) return svgMapillaryMapFeatures.enabled;
-	    svgMapillaryMapFeatures.enabled = _;
+	    checkImpliedYes();
+	    var isMixed = Array.isArray(tags[field.key]);
+	    _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
 
-	    if (svgMapillaryMapFeatures.enabled) {
-	      showLayer();
-	    } else {
-	      hideLayer();
+	    if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+	      _value = 'yes';
 	    }
 
-	    dispatch.call('change');
-	    return this;
+	    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);
+
+	    if (field.type === 'onewayCheck') {
+	      reverser.classed('hide', reverserHidden()).call(reverserSetText);
+	    }
 	  };
 
-	  drawMapFeatures.supported = function () {
-	    return !!getService();
+	  check.focus = function () {
+	    input.node().focus();
 	  };
 
-	  init();
-	  return drawMapFeatures;
+	  return utilRebind(check, dispatch, 'on');
 	}
 
-	function svgOpenstreetcamImages(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () {
-	    dispatch.call('change');
-	  }, 1000);
+	function uiFieldCombo(field, context) {
+	  var dispatch = dispatch$8('change');
 
-	  var minZoom = 12;
-	  var minMarkerZoom = 16;
-	  var minViewfieldZoom = 18;
-	  var layer = select(null);
+	  var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-	  var _openstreetcam;
+	  var _isNetwork = field.type === 'networkCombo';
 
-	  function init() {
-	    if (svgOpenstreetcamImages.initialized) return; // run once
+	  var _isSemi = field.type === 'semiCombo';
 
-	    svgOpenstreetcamImages.enabled = false;
-	    svgOpenstreetcamImages.initialized = true;
-	  }
+	  var _optarray = field.options;
 
-	  function getService() {
-	    if (services.openstreetcam && !_openstreetcam) {
-	      _openstreetcam = services.openstreetcam;
+	  var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;
 
-	      _openstreetcam.event.on('loadedImages', throttledRedraw);
-	    } else if (!services.openstreetcam && _openstreetcam) {
-	      _openstreetcam = null;
-	    }
+	  var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;
 
-	    return _openstreetcam;
-	  }
+	  var _snake_case = field.snake_case || field.snake_case === undefined;
 
-	  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');
-	    });
-	  }
+	  var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-	  function hideLayer() {
-	    throttledRedraw.cancel();
-	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-	  }
+	  var _container = select(null);
 
-	  function editOn() {
-	    layer.style('display', 'block');
-	  }
+	  var _inputWrap = select(null);
 
-	  function editOff() {
-	    layer.selectAll('.viewfield-group').remove();
-	    layer.style('display', 'none');
-	  }
+	  var _input = select(null);
 
-	  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);
-	  }
+	  var _comboData = [];
+	  var _multiData = [];
+	  var _entityIDs = [];
 
-	  function mouseover(d3_event, d) {
-	    var service = getService();
-	    if (service) service.setStyles(context, d);
+	  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 && field.key && /[^:]$/.test(field.key)) {
+	    field.key += ':';
 	  }
 
-	  function mouseout() {
-	    var service = getService();
-	    if (service) service.setStyles(context, null);
+	  function snake(s) {
+	    return s.replace(/\s+/g, '_').toLowerCase();
 	  }
 
-	  function transform(d) {
-	    var t = svgPointTransform(projection)(d);
+	  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)
 
-	    if (d.ca) {
-	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	    }
 
-	    return t;
-	  }
+	  function tagValue(dval) {
+	    dval = clean(dval || '');
 
-	  context.photos().on('change.openstreetcam_images', update);
+	    var found = _comboData.find(function (o) {
+	      return o.key && clean(o.value) === dval;
+	    });
 
-	  function filterImages(images) {
-	    var fromDate = context.photos().fromDate();
-	    var toDate = context.photos().toDate();
-	    var usernames = context.photos().usernames();
+	    if (found) return found.key;
 
-	    if (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      images = images.filter(function (item) {
-	        return new Date(item.captured_at).getTime() >= fromTimestamp;
-	      });
+	    if (field.type === 'typeCombo' && !dval) {
+	      return 'yes';
 	    }
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      images = images.filter(function (item) {
-	        return new Date(item.captured_at).getTime() <= toTimestamp;
+	    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)
+
+
+	  function displayValue(tval) {
+	    tval = tval || '';
+
+	    if (field.hasTextForStringId('options.' + tval)) {
+	      return field.t('options.' + tval, {
+	        "default": tval
 	      });
 	    }
 
-	    if (usernames) {
-	      images = images.filter(function (item) {
-	        return usernames.indexOf(item.captured_by) !== -1;
-	      });
+	    if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+	      return '';
 	    }
 
-	    return images;
-	  }
+	    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}]
+	  //
 
-	  function filterSequences(sequences) {
-	    var fromDate = context.photos().fromDate();
-	    var toDate = context.photos().toDate();
-	    var usernames = context.photos().usernames();
 
-	    if (fromDate) {
-	      var fromTimestamp = new Date(fromDate).getTime();
-	      sequences = sequences.filter(function (image) {
-	        return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+	  function objectDifference(a, b) {
+	    return a.filter(function (d1) {
+	      return !b.some(function (d2) {
+	        return !d2.isMixed && d1.value === d2.value;
 	      });
-	    }
+	    });
+	  }
 
-	    if (toDate) {
-	      var toTimestamp = new Date(toDate).getTime();
-	      sequences = sequences.filter(function (image) {
-	        return new Date(image.properties.captured_at).getTime() <= toTimestamp;
-	      });
+	  function initCombo(selection, attachTo) {
+	    if (!_allowCustomValues) {
+	      selection.attr('readonly', 'readonly');
 	    }
 
-	    if (usernames) {
-	      sequences = sequences.filter(function (image) {
-	        return usernames.indexOf(image.properties.captured_by) !== -1;
-	      });
+	    if (_showTagInfoSuggestions && services.taginfo) {
+	      selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+	      setTaginfoValues('', setPlaceholder);
+	    } else {
+	      selection.call(_combobox, attachTo);
+	      setStaticValues(setPlaceholder);
 	    }
+	  }
 
-	    return sequences;
+	  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'
+	      };
+	    });
+
+	    _combobox.data(objectDifference(_comboData, _multiData));
+
+	    if (callback) callback(_comboData);
 	  }
 
-	  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 = [];
+	  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 (context.photos().showsFlat()) {
-	      sequences = service ? service.sequences(projection) : [];
-	      images = service && showMarkers ? service.images(projection) : [];
-	      sequences = filterSequences(sequences);
-	      images = filterImages(images);
+	    if (hasCountryPrefix) {
+	      query = _countryCode + ':';
 	    }
 
-	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-	      return d.properties.key;
-	    }); // exit
+	    var params = {
+	      debounce: q !== '',
+	      key: field.key,
+	      query: query
+	    };
 
-	    traces.exit().remove(); // enter/update
+	    if (_entityIDs.length) {
+	      params.geometry = context.graph().geometry(_entityIDs[0]);
+	    }
 
-	    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
+	    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
 
-	    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
+	        return !d.count || d.count > 10;
+	      });
+	      var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-	    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');
+	      if (deprecatedValues) {
+	        // don't suggest deprecated tag values
+	        data = data.filter(function (d) {
+	          return deprecatedValues.indexOf(d.value) === -1;
+	        });
+	      }
+
+	      if (hasCountryPrefix) {
+	        data = data.filter(function (d) {
+	          return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+	        });
+	      } // 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 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 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);
+	  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 (enabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        update();
-	        service.loadImages(projection);
-	      } else {
-	        editOff();
-	      }
+	    if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+	      _staticPlaceholder += '…';
 	    }
-	  }
 
-	  drawImages.enabled = function (_) {
-	    if (!arguments.length) return svgOpenstreetcamImages.enabled;
-	    svgOpenstreetcamImages.enabled = _;
+	    var ph;
 
-	    if (svgOpenstreetcamImages.enabled) {
-	      showLayer();
+	    if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+	      ph = _t('inspector.multiple_values');
 	    } else {
-	      hideLayer();
+	      ph = _staticPlaceholder;
 	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	    _container.selectAll('input').attr('placeholder', ph);
+	  }
 
-	  drawImages.supported = function () {
-	    return !!getService();
-	  };
+	  function change() {
+	    var t = {};
+	    var val;
 
-	  init();
-	  return drawImages;
-	}
+	    if (_isMulti || _isSemi) {
+	      val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-	function svgOsm(projection, context, dispatch) {
-	  var enabled = true;
+	      _container.classed('active', false);
 
-	  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;
-	    });
-	  }
+	      utilGetSetValue(_input, '');
+	      var vals = val.split(';').filter(Boolean);
+	      if (!vals.length) return;
 
-	  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');
-	    });
-	  }
+	      if (_isMulti) {
+	        utilArrayUniq(vals).forEach(function (v) {
+	          var key = (field.key || '') + v;
 
-	  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');
-	    });
-	  }
+	          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;
+	          }
 
-	  drawOsm.enabled = function (val) {
-	    if (!arguments.length) return enabled;
-	    enabled = val;
+	          key = context.cleanTagKey(key);
+	          field.keys.push(key);
+	          t[key] = 'yes';
+	        });
+	      } else if (_isSemi) {
+	        var arr = _multiData.map(function (d) {
+	          return d.key;
+	        });
 
-	    if (enabled) {
-	      showLayer();
+	        arr = arr.concat(vals);
+	        t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+	      }
+
+	      window.setTimeout(function () {
+	        _input.node().focus();
+	      }, 10);
 	    } else {
-	      hideLayer();
+	      var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
+
+	      if (!rawValue && Array.isArray(_tags[field.key])) return;
+	      val = context.cleanTagValue(tagValue(rawValue));
+	      t[field.key] = val || undefined;
 	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	    dispatch.call('change', this, t);
+	  }
 
-	  return drawOsm;
-	}
+	  function removeMultikey(d3_event, d) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var t = {};
 
-	var _notesEnabled = false;
+	    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);
 
-	var _osmService;
+	      arr = utilArrayUniq(arr);
+	      t[field.key] = arr.length ? arr.join(';') : undefined;
+	    }
 
-	function svgNotes(projection, context, dispatch$1) {
-	  if (!dispatch$1) {
-	    dispatch$1 = dispatch('change');
+	    dispatch.call('change', this, t);
 	  }
 
-	  var throttledRedraw = throttle(function () {
-	    dispatch$1.call('change');
-	  }, 1000);
+	  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);
 
-	  var minZoom = 12;
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var _notesVisible = false;
+	    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';
+	      }
+
+	      _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);
+
+	    if (_isNetwork) {
+	      var extent = combinedEntityExtent();
+	      var countryCode = extent && iso1A2Code(extent.center());
+	      _countryCode = countryCode && countryCode.toLowerCase();
+	    }
 
-	  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.
+	    _input.on('change', change).on('blur', change);
 
+	    _input.on('keydown.field', function (d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 13:
+	          // ↩ Return
+	          _input.node().blur(); // blurring also enters the value
 
-	  function getService() {
-	    if (services.osm && !_osmService) {
-	      _osmService = services.osm;
 
-	      _osmService.on('loadedNotes', throttledRedraw);
-	    } else if (!services.osm && _osmService) {
-	      _osmService = null;
-	    }
+	          d3_event.stopPropagation();
+	          break;
+	      }
+	    });
 
-	    return _osmService;
-	  } // Show the notes
+	    if (_isMulti || _isSemi) {
+	      _combobox.on('accept', function () {
+	        _input.node().blur();
 
+	        _input.node().focus();
+	      });
 
-	  function editOn() {
-	    if (!_notesVisible) {
-	      _notesVisible = true;
-	      drawLayer.style('display', 'block');
+	      _input.on('focus', function () {
+	        _container.classed('active', true);
+	      });
 	    }
-	  } // Immediately remove the notes and their touch targets
+	  }
 
+	  combo.tags = function (tags) {
+	    _tags = tags;
 
-	  function editOff() {
-	    if (_notesVisible) {
-	      _notesVisible = false;
-	      drawLayer.style('display', 'none');
-	      drawLayer.selectAll('.note').remove();
-	      touchLayer.selectAll('.note').remove();
-	    }
-	  } // Enable the layer.  This shows the notes and transitions them to visible.
+	    if (_isMulti || _isSemi) {
+	      _multiData = [];
+	      var maxLength;
 
+	      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;
 
-	  function layerOn() {
-	    editOn();
-	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-	      dispatch$1.call('change');
-	    });
-	  } // Disable the layer.  This transitions the layer invisible and then hides the notes.
+	          _multiData.push({
+	            key: k,
+	            value: displayValue(suffix),
+	            isMixed: Array.isArray(v)
+	          });
+	        }
 
+	        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
 
-	  function layerOff() {
-	    throttledRedraw.cancel();
-	    drawLayer.interrupt();
-	    touchLayer.selectAll('.note').remove();
-	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-	      editOff();
-	      dispatch$1.call('change');
-	    });
-	  } // Update the note markers
+	          maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	        } else {
+	          maxLength = context.maxCharsForTagKey();
+	        }
+	      } else if (_isSemi) {
+	        var allValues = [];
+	        var commonValues;
 
+	        if (Array.isArray(tags[field.key])) {
+	          tags[field.key].forEach(function (tagVal) {
+	            var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+	            allValues = allValues.concat(thisVals);
 
-	  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..
+	            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;
+	        }
 
-	    var notes = drawLayer.selectAll('.note').data(data, function (d) {
-	      return d.status + d.id;
-	    }); // exit
+	        _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
 
-	    notes.exit().remove(); // enter
+	        maxLength = context.maxCharsForTagValue() - currLength;
 
-	    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');
-	    }); // update
+	        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
 
-	    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..
+	      maxLength = Math.max(0, maxLength);
+	      var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+	      && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
-	    if (touchLayer.empty()) return;
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	    var targets = touchLayer.selectAll('.note').data(data, function (d) {
-	      return d.id;
-	    }); // exit
+	      var available = objectDifference(_comboData, _multiData);
 
-	    targets.exit().remove(); // enter/update
+	      _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
 
-	    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) {
-	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
-	    }
-	  } // Draw the notes layer and schedule loading notes and updating markers.
+	      var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;
 
+	      _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-	  function drawNotes(selection) {
-	    var service = getService();
-	    var surface = context.surface();
 
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	      var chips = _container.selectAll('.chip').data(_multiData);
 
-	    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);
+	      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 (_notesEnabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadNotes(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
+	      if (allowDragAndDrop) {
+	        registerDragAndDrop(chips);
 	      }
-	    }
-	  } // Toggles the layer on and off
-
-
-	  drawNotes.enabled = function (val) {
-	    if (!arguments.length) return _notesEnabled;
-	    _notesEnabled = val;
 
-	    if (_notesEnabled) {
-	      layerOn();
+	      chips.select('span').text(function (d) {
+	        return d.value;
+	      });
+	      chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').text('×');
 	    } else {
-	      layerOff();
-
-	      if (context.selectedNoteID()) {
-	        context.enter(modeBrowse(context));
-	      }
+	      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);
+	        }
+	      });
 	    }
-
-	    dispatch$1.call('change');
-	    return this;
 	  };
 
-	  return drawNotes;
-	}
+	  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;
 
-	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;
-	    });
-	  }
+	      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();
 
-	  return drawTouch;
-	}
+	          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;
+	            }
 
-	function refresh(selection, node) {
-	  var cr = node.getBoundingClientRect();
-	  var prop = [cr.width, cr.height];
-	  selection.property('__dimensions__', prop);
-	  return prop;
-	}
+	            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;
+	            }
 
-	function utilGetDimensions(selection, force) {
-	  if (!selection || selection.empty()) {
-	    return [0, 0];
-	  }
+	            return 'translateY(100%)';
+	          }
 
-	  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;
-	  }
+	          return null;
+	        });
+	      } else {
+	        _container.selectAll('.chip').each(function (d2, index2) {
+	          var node = select(this).node(); // check the cursor is in the bounding box
 
-	  var node = selection.node();
+	          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 (dimensions === null) {
-	    refresh(selection, node);
-	    return selection;
-	  }
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)';
+	          } // only translate tags in the same row
 
-	  return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
-	}
 
-	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-position',
-	    layer: svgMapillaryPosition(projection, context)
-	  }, {
-	    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()
-	  }];
+	          if (node.offsetTop === targetIndexOffsetTop) {
+	            if (index2 < index && index2 >= targetIndex) {
+	              return 'translateX(' + draggedTagWidth + 'px)';
+	            } else if (index2 > index && index2 <= targetIndex) {
+	              return 'translateX(-' + draggedTagWidth + 'px)';
+	            }
+	          }
 
-	  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);
-	    });
-	  }
+	          return null;
+	        });
+	      }
+	    }).on('end', function () {
+	      if (!select(this).classed('dragging')) {
+	        return;
+	      }
 
-	  drawLayers.all = function () {
-	    return _layers;
-	  };
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
 
-	  drawLayers.layer = function (id) {
-	    var obj = _layers.find(function (o) {
-	      return o.id === id;
-	    });
+	      _container.selectAll('.chip').style('transform', null);
 
-	    return obj && obj.layer;
-	  };
+	      if (typeof targetIndex === 'number') {
+	        var element = _multiData[index];
 
-	  drawLayers.only = function (what) {
-	    var arr = [].concat(what);
+	        _multiData.splice(index, 1);
 
-	    var all = _layers.map(function (layer) {
-	      return layer.id;
-	    });
+	        _multiData.splice(targetIndex, 0, element);
 
-	    return drawLayers.remove(utilArrayDifference(all, arr));
-	  };
+	        var t = {};
 
-	  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 (_multiData.length) {
+	          t[field.key] = _multiData.map(function (element) {
+	            return element.key;
+	          }).join(';');
+	        } else {
+	          t[field.key] = undefined;
+	        }
 
-	  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', this, t);
 	      }
-	    });
-	    dispatch$1.call('change');
-	    return this;
-	  };
 
-	  drawLayers.dimensions = function (val) {
-	    if (!arguments.length) return utilGetDimensions(svg);
-	    utilSetDimensions(svg, val);
-	    return this;
-	  };
+	      dragOrigin = undefined;
+	      targetIndex = undefined;
+	    }));
+	  }
 
-	  return utilRebind(drawLayers, dispatch$1, 'on');
-	}
+	  combo.focus = function () {
+	    _input.node().focus();
+	  };
 
-	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
+	  combo.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return combo;
 	  };
 
-	  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
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    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
+	  return utilRebind(combo, dispatch, 'on');
+	}
 
-	    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
+	// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+	var global$2 = global$1o;
+	var uncurryThis$1 = functionUncurryThis;
 
-	    targets.exit().remove();
+	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 segmentWasEdited = function segmentWasEdited(d) {
-	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+	var RangeError$1 = global$2.RangeError;
+	var exec$1 = uncurryThis$1(regexSeparators.exec);
+	var floor$1 = Math.floor;
+	var fromCharCode = String.fromCharCode;
+	var charCodeAt = uncurryThis$1(''.charCodeAt);
+	var join$1 = uncurryThis$1([].join);
+	var push$1 = uncurryThis$1([].push);
+	var replace$1 = uncurryThis$1(''.replace);
+	var split$1 = uncurryThis$1(''.split);
+	var toLowerCase$1 = uncurryThis$1(''.toLowerCase);
 
-	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	        return false;
+	/**
+	 * 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 = charCodeAt(string, counter++);
+	    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+	      // It's a high surrogate, and there is a next character.
+	      var extra = charCodeAt(string, counter++);
+	      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
+	        push$1(output, ((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.
+	        push$1(output, value);
+	        counter--;
 	      }
+	    } else {
+	      push$1(output, value);
+	    }
+	  }
+	  return output;
+	};
 
-	      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
-
-
-	    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
+	/**
+	 * 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);
+	};
 
-	    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);
+	/**
+	 * 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$1(delta / damp) : delta >> 1;
+	  delta += floor$1(delta / numPoints);
+	  while (delta > baseMinusTMin * tMax >> 1) {
+	    delta = floor$1(delta / baseMinusTMin);
+	    k += base;
 	  }
+	  return floor$1(k + (baseMinusTMin + 1) * delta / (delta + skew));
+	};
 
-	  function drawLines(selection, graph, entities, filter) {
-	    var base = context.history().base();
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 */
+	var encode = function (input) {
+	  var output = [];
 
-	    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;
+	  // Convert the input in UCS-2 to an array of Unicode code points.
+	  input = ucs2decode(input);
 
-	      if (a.tags.highway) {
-	        scoreA -= highway_stack[a.tags.highway];
-	      }
+	  // Cache the length.
+	  var inputLength = input.length;
 
-	      if (b.tags.highway) {
-	        scoreB -= highway_stack[b.tags.highway];
-	      }
+	  // Initialize the state.
+	  var n = initialN;
+	  var delta = 0;
+	  var bias = initialBias;
+	  var i, currentValue;
 
-	      return scoreA - scoreB;
+	  // Handle the basic code points.
+	  for (i = 0; i < input.length; i++) {
+	    currentValue = input[i];
+	    if (currentValue < 0x80) {
+	      push$1(output, fromCharCode(currentValue));
 	    }
+	  }
 
-	    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
+	  var basicLength = output.length; // number of basic code points.
+	  var handledCPCount = basicLength; // number of code points that have been handled;
 
-	          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';
-	          }
-	        }
+	  // Finish the basic string with a delimiter unless it's empty.
+	  if (basicLength) {
+	    push$1(output, delimiter);
+	  }
 
-	        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;
+	  // 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;
+	      }
 	    }
 
-	    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;
-	        });
-	      };
+	    // 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$1((maxInt - delta) / handledCPCountPlusOne)) {
+	      throw RangeError$1(OVERFLOW_ERROR);
 	    }
 
-	    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;
-	      });
+	    delta += (m - n) * handledCPCountPlusOne;
+	    n = m;
 
-	      if (detected.ie) {
-	        markers.each(function () {
-	          this.parentNode.insertBefore(this, this);
-	        });
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue < n && ++delta > maxInt) {
+	        throw RangeError$1(OVERFLOW_ERROR);
 	      }
-	    }
-
-	    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 (currentValue == n) {
+	        // Represent delta as a generalized variable-length integer.
+	        var q = delta;
+	        var k = base;
+	        while (true) {
+	          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+	          if (q < t) break;
+	          var qMinusT = q - t;
+	          var baseMinusT = base - t;
+	          push$1(output, fromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
+	          q = floor$1(qMinusT / baseMinusT);
+	          k += base;
+	        }
 
-	      if (outer) {
-	        ways.push(entity.mergeTags(outer.tags));
-	        oldMultiPolygonOuters[outer.id] = true;
-	      } else if (entity.geometry(graph) === 'line') {
-	        ways.push(entity);
+	        push$1(output, fromCharCode(digitToBasic(q)));
+	        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+	        delta = 0;
+	        handledCPCount++;
 	      }
 	    }
 
-	    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
+	    delta++;
+	    n++;
+	  }
+	  return join$1(output, '');
+	};
 
-	    var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
+	var stringPunycodeToAscii = function (input) {
+	  var encoded = [];
+	  var labels = split$1(replace$1(toLowerCase$1(input), regexSeparators, '\u002E'), '.');
+	  var i, label;
+	  for (i = 0; i < labels.length; i++) {
+	    label = labels[i];
+	    push$1(encoded, exec$1(regexNonASCII, label) ? 'xn--' + encode(label) : label);
+	  }
+	  return join$1(encoded, '.');
+	};
 
-	    var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
 
-	    [covered, uncovered].forEach(function (selection) {
-	      var range$1 = selection === covered ? range(-10, 0) : range(0, 11);
-	      var layergroup = selection.selectAll('g.layergroup').data(range$1);
-	      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..
+	var $ = _export;
+	var DESCRIPTORS = descriptors;
+	var USE_NATIVE_URL = nativeUrl;
+	var global$1 = global$1o;
+	var bind$2 = functionBindContext;
+	var uncurryThis = functionUncurryThis;
+	var defineProperties = objectDefineProperties.f;
+	var redefine = redefine$h.exports;
+	var anInstance = anInstance$7;
+	var hasOwn = hasOwnProperty_1;
+	var assign$1 = objectAssign;
+	var arrayFrom = arrayFrom$1;
+	var arraySlice = arraySliceSimple;
+	var codeAt = stringMultibyte.codeAt;
+	var toASCII = stringPunycodeToAscii;
+	var $toString = toString$k;
+	var setToStringTag = setToStringTag$a;
+	var validateArgumentsLength = validateArgumentsLength$4;
+	var URLSearchParamsModule = web_urlSearchParams;
+	var InternalStateModule = internalState;
+
+	var setInternalState = InternalStateModule.set;
+	var getInternalURLState = InternalStateModule.getterFor('URL');
+	var URLSearchParams$1 = URLSearchParamsModule.URLSearchParams;
+	var getInternalSearchParamsState = URLSearchParamsModule.getState;
+
+	var NativeURL = global$1.URL;
+	var TypeError$1 = global$1.TypeError;
+	var parseInt$1 = global$1.parseInt;
+	var floor = Math.floor;
+	var pow = Math.pow;
+	var charAt = uncurryThis(''.charAt);
+	var exec = uncurryThis(/./.exec);
+	var join = uncurryThis([].join);
+	var numberToString = uncurryThis(1.0.toString);
+	var pop = uncurryThis([].pop);
+	var push = uncurryThis([].push);
+	var replace = uncurryThis(''.replace);
+	var shift = uncurryThis([].shift);
+	var split = uncurryThis(''.split);
+	var stringSlice = uncurryThis(''.slice);
+	var toLowerCase = uncurryThis(''.toLowerCase);
+	var unshift = uncurryThis([].unshift);
 
-	    touchLayer.call(drawTargets, graph, ways, filter);
-	  }
+	var INVALID_AUTHORITY = 'Invalid authority';
+	var INVALID_SCHEME = 'Invalid scheme';
+	var INVALID_HOST = 'Invalid host';
+	var INVALID_PORT = 'Invalid port';
 
-	  return drawLines;
-	}
+	var ALPHA = /[a-z]/i;
+	// eslint-disable-next-line regexp/no-obscure-range -- safe
+	var ALPHANUMERIC = /[\d+-.a-z]/i;
+	var DIGIT = /\d/;
+	var HEX_START = /^0x/i;
+	var OCT = /^[0-7]+$/;
+	var DEC = /^\d+$/;
+	var HEX = /^[\da-f]+$/i;
+	/* eslint-disable regexp/no-control-character -- 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-\u0020]+|[\u0000-\u0020]+$/g;
+	var TAB_AND_NEW_LINE = /[\t\n\r]/g;
+	/* eslint-enable regexp/no-control-character -- safe */
+	var EOF;
 
-	function svgMidpoints(projection, context) {
-	  var targetRadius = 8;
+	// https://url.spec.whatwg.org/#ipv4-number-parser
+	var parseIPv4 = function (input) {
+	  var parts = split(input, '.');
+	  var partsLength, numbers, index, part, radix, number, ipv4;
+	  if (parts.length && parts[parts.length - 1] == '') {
+	    parts.length--;
+	  }
+	  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 && charAt(part, 0) == '0') {
+	      radix = exec(HEX_START, part) ? 16 : 8;
+	      part = stringSlice(part, radix == 8 ? 1 : 2);
+	    }
+	    if (part === '') {
+	      number = 0;
+	    } else {
+	      if (!exec(radix == 10 ? DEC : radix == 8 ? OCT : HEX, part)) return input;
+	      number = parseInt$1(part, radix);
+	    }
+	    push(numbers, number);
+	  }
+	  for (index = 0; index < partsLength; index++) {
+	    number = numbers[index];
+	    if (index == partsLength - 1) {
+	      if (number >= pow(256, 5 - partsLength)) return null;
+	    } else if (number > 255) return null;
+	  }
+	  ipv4 = pop(numbers);
+	  for (index = 0; index < numbers.length; index++) {
+	    ipv4 += numbers[index] * pow(256, 3 - index);
+	  }
+	  return ipv4;
+	};
 
-	  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
+	// https://url.spec.whatwg.org/#concept-ipv6-parser
+	// 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;
 
-	    targets.exit().remove(); // enter/update
+	  var chr = function () {
+	    return charAt(input, pointer);
+	  };
 
-	    targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
-	      return 'node midpoint target ' + fillClass + d.id;
-	    }).attr('transform', getTransform);
+	  if (chr() == ':') {
+	    if (charAt(input, 1) != ':') return;
+	    pointer += 2;
+	    pieceIndex++;
+	    compress = pieceIndex;
+	  }
+	  while (chr()) {
+	    if (pieceIndex == 8) return;
+	    if (chr() == ':') {
+	      if (compress !== null) return;
+	      pointer++;
+	      pieceIndex++;
+	      compress = pieceIndex;
+	      continue;
+	    }
+	    value = length = 0;
+	    while (length < 4 && exec(HEX, chr())) {
+	      value = value * 16 + parseInt$1(chr(), 16);
+	      pointer++;
+	      length++;
+	    }
+	    if (chr() == '.') {
+	      if (length == 0) return;
+	      pointer -= length;
+	      if (pieceIndex > 6) return;
+	      numbersSeen = 0;
+	      while (chr()) {
+	        ipv4Piece = null;
+	        if (numbersSeen > 0) {
+	          if (chr() == '.' && numbersSeen < 4) pointer++;
+	          else return;
+	        }
+	        if (!exec(DIGIT, chr())) return;
+	        while (exec(DIGIT, chr())) {
+	          number = parseInt$1(chr(), 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 (chr() == ':') {
+	      pointer++;
+	      if (!chr()) return;
+	    } else if (chr()) 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;
+	};
 
-	  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();
+	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;
+	};
 
-	    if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
-	      drawLayer.selectAll('.midpoint').remove();
-	      touchLayer.selectAll('.midpoint.target').remove();
-	      return;
+	// https://url.spec.whatwg.org/#host-serializing
+	var serializeHost = function (host) {
+	  var result, index, compress, ignore0;
+	  // ipv4
+	  if (typeof host == 'number') {
+	    result = [];
+	    for (index = 0; index < 4; index++) {
+	      unshift(result, host % 256);
+	      host = floor(host / 256);
+	    } return join(result, '.');
+	  // 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 += numberToString(host[index], 16);
+	        if (index < 7) result += ':';
+	      }
 	    }
+	    return '[' + result + ']';
+	  } return host;
+	};
 
-	    var poly = extent.polygon();
-	    var midpoints = {};
+	var C0ControlPercentEncodeSet = {};
+	var fragmentPercentEncodeSet = assign$1({}, C0ControlPercentEncodeSet, {
+	  ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+	});
+	var pathPercentEncodeSet = assign$1({}, fragmentPercentEncodeSet, {
+	  '#': 1, '?': 1, '{': 1, '}': 1
+	});
+	var userinfoPercentEncodeSet = assign$1({}, pathPercentEncodeSet, {
+	  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+	});
 
-	    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);
+	var percentEncode = function (chr, set) {
+	  var code = codeAt(chr, 0);
+	  return code > 0x20 && code < 0x7F && !hasOwn(set, chr) ? chr : encodeURIComponent(chr);
+	};
 
-	      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('-');
+	// https://url.spec.whatwg.org/#special-scheme
+	var specialSchemes = {
+	  ftp: 21,
+	  file: null,
+	  http: 80,
+	  https: 443,
+	  ws: 80,
+	  wss: 443
+	};
 
-	        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;
+	// https://url.spec.whatwg.org/#windows-drive-letter
+	var isWindowsDriveLetter = function (string, normalized) {
+	  var second;
+	  return string.length == 2 && exec(ALPHA, charAt(string, 0))
+	    && ((second = charAt(string, 1)) == ':' || (!normalized && second == '|'));
+	};
 
-	          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]]);
+	// https://url.spec.whatwg.org/#start-with-a-windows-drive-letter
+	var startsWithWindowsDriveLetter = function (string) {
+	  var third;
+	  return string.length > 1 && isWindowsDriveLetter(stringSlice(string, 0, 2)) && (
+	    string.length == 2 ||
+	    ((third = charAt(string, 2)) === '/' || third === '\\' || third === '?' || third === '#')
+	  );
+	};
 
-	              if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
-	                loc = point;
-	                break;
-	              }
-	            }
-	          }
+	// https://url.spec.whatwg.org/#single-dot-path-segment
+	var isSingleDot = function (segment) {
+	  return segment === '.' || toLowerCase(segment) === '%2e';
+	};
 
-	          if (loc) {
-	            midpoints[id] = {
-	              type: 'midpoint',
-	              id: id,
-	              loc: loc,
-	              edge: [a.id, b.id],
-	              parents: [entity]
-	            };
-	          }
-	        }
-	      }
-	    }
+	// https://url.spec.whatwg.org/#double-dot-path-segment
+	var isDoubleDot = function (segment) {
+	  segment = toLowerCase(segment);
+	  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+	};
 
-	    function midpointFilter(d) {
-	      if (midpoints[d.id]) return true;
+	// 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 = {};
 
-	      for (var i = 0; i < d.parents.length; i++) {
-	        if (filter(d.parents[i])) {
-	          return true;
-	        }
-	      }
+	var URLState = function (url, isBase, base) {
+	  var urlString = $toString(url);
+	  var baseState, failure, searchParams;
+	  if (isBase) {
+	    failure = this.parse(urlString);
+	    if (failure) throw TypeError$1(failure);
+	    this.searchParams = null;
+	  } else {
+	    if (base !== undefined) baseState = new URLState(base, true);
+	    failure = this.parse(urlString, null, baseState);
+	    if (failure) throw TypeError$1(failure);
+	    searchParams = getInternalSearchParamsState(new URLSearchParams$1());
+	    searchParams.bindURL(this);
+	    this.searchParams = searchParams;
+	  }
+	};
 
-	      return false;
+	URLState.prototype = {
+	  type: 'URL',
+	  // https://url.spec.whatwg.org/#url-parsing
+	  // eslint-disable-next-line max-statements -- TODO
+	  parse: function (input, stateOverride, base) {
+	    var url = this;
+	    var state = stateOverride || SCHEME_START;
+	    var pointer = 0;
+	    var buffer = '';
+	    var seenAt = false;
+	    var seenBracket = false;
+	    var seenPasswordToken = false;
+	    var codePoints, chr, bufferCodePoints, failure;
+
+	    input = $toString(input);
+
+	    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 = replace(input, LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
 	    }
 
-	    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..
+	    input = replace(input, TAB_AND_NEW_LINE, '');
 
-	    touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
-	  }
+	    codePoints = arrayFrom(input);
 
-	  return drawMidpoints;
-	}
+	    while (pointer <= codePoints.length) {
+	      chr = codePoints[pointer];
+	      switch (state) {
+	        case SCHEME_START:
+	          if (chr && exec(ALPHA, chr)) {
+	            buffer += toLowerCase(chr);
+	            state = SCHEME;
+	          } else if (!stateOverride) {
+	            state = NO_SCHEME;
+	            continue;
+	          } else return INVALID_SCHEME;
+	          break;
 
-	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');
-	  }
+	        case SCHEME:
+	          if (chr && (exec(ALPHANUMERIC, chr) || chr == '+' || chr == '-' || chr == '.')) {
+	            buffer += toLowerCase(chr);
+	          } else if (chr == ':') {
+	            if (stateOverride && (
+	              (url.isSpecial() != hasOwn(specialSchemes, buffer)) ||
+	              (buffer == 'file' && (url.includesCredentials() || url.port !== null)) ||
+	              (url.scheme == 'file' && !url.host)
+	            )) return;
+	            url.scheme = buffer;
+	            if (stateOverride) {
+	              if (url.isSpecial() && specialSchemes[url.scheme] == url.port) url.port = null;
+	              return;
+	            }
+	            buffer = '';
+	            if (url.scheme == 'file') {
+	              state = FILE;
+	            } else if (url.isSpecial() && base && base.scheme == url.scheme) {
+	              state = SPECIAL_RELATIVE_OR_AUTHORITY;
+	            } else if (url.isSpecial()) {
+	              state = SPECIAL_AUTHORITY_SLASHES;
+	            } else if (codePoints[pointer + 1] == '/') {
+	              state = PATH_OR_AUTHORITY;
+	              pointer++;
+	            } else {
+	              url.cannotBeABaseURL = true;
+	              push(url.path, '');
+	              state = CANNOT_BE_A_BASE_URL_PATH;
+	            }
+	          } else if (!stateOverride) {
+	            buffer = '';
+	            state = NO_SCHEME;
+	            pointer = 0;
+	            continue;
+	          } else return INVALID_SCHEME;
+	          break;
 
-	  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.
+	        case NO_SCHEME:
+	          if (!base || (base.cannotBeABaseURL && chr != '#')) return INVALID_SCHEME;
+	          if (base.cannotBeABaseURL && chr == '#') {
+	            url.scheme = base.scheme;
+	            url.path = arraySlice(base.path);
+	            url.query = base.query;
+	            url.fragment = '';
+	            url.cannotBeABaseURL = true;
+	            state = FRAGMENT;
+	            break;
+	          }
+	          state = base.scheme == 'file' ? FILE : RELATIVE;
+	          continue;
 
+	        case SPECIAL_RELATIVE_OR_AUTHORITY:
+	          if (chr == '/' && codePoints[pointer + 1] == '/') {
+	            state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	            pointer++;
+	          } else {
+	            state = RELATIVE;
+	            continue;
+	          } break;
 
-	  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);
-	  }
+	        case PATH_OR_AUTHORITY:
+	          if (chr == '/') {
+	            state = AUTHORITY;
+	            break;
+	          } else {
+	            state = PATH;
+	            continue;
+	          }
 
-	  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
+	        case RELATIVE:
+	          url.scheme = base.scheme;
+	          if (chr == EOF) {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            url.query = base.query;
+	          } else if (chr == '/' || (chr == '\\' && url.isSpecial())) {
+	            state = RELATIVE_SLASH;
+	          } else if (chr == '?') {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            url.query = '';
+	            state = QUERY;
+	          } else if (chr == '#') {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            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 = arraySlice(base.path);
+	            url.path.length--;
+	            state = PATH;
+	            continue;
+	          } break;
 
-	      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
+	        case RELATIVE_SLASH:
+	          if (url.isSpecial() && (chr == '/' || chr == '\\')) {
+	            state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	          } else if (chr == '/') {
+	            state = AUTHORITY;
+	          } else {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            state = PATH;
+	            continue;
+	          } break;
 
-	    targets.exit().remove(); // enter/update
+	        case SPECIAL_AUTHORITY_SLASHES:
+	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	          if (chr != '/' || charAt(buffer, pointer + 1) != '/') continue;
+	          pointer++;
+	          break;
 
-	    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);
-	  }
+	        case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+	          if (chr != '/' && chr != '\\') {
+	            state = AUTHORITY;
+	            continue;
+	          } break;
+
+	        case AUTHORITY:
+	          if (chr == '@') {
+	            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 (
+	            chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+	            (chr == '\\' && url.isSpecial())
+	          ) {
+	            if (seenAt && buffer == '') return INVALID_AUTHORITY;
+	            pointer -= arrayFrom(buffer).length + 1;
+	            buffer = '';
+	            state = HOST;
+	          } else buffer += chr;
+	          break;
 
-	  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..
+	        case HOST:
+	        case HOSTNAME:
+	          if (stateOverride && url.scheme == 'file') {
+	            state = FILE_HOST;
+	            continue;
+	          } else if (chr == ':' && !seenBracket) {
+	            if (buffer == '') return INVALID_HOST;
+	            failure = url.parseHost(buffer);
+	            if (failure) return failure;
+	            buffer = '';
+	            state = PORT;
+	            if (stateOverride == HOSTNAME) return;
+	          } else if (
+	            chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+	            (chr == '\\' && url.isSpecial())
+	          ) {
+	            if (url.isSpecial() && buffer == '') return INVALID_HOST;
+	            if (stateOverride && buffer == '' && (url.includesCredentials() || url.port !== null)) return;
+	            failure = url.parseHost(buffer);
+	            if (failure) return failure;
+	            buffer = '';
+	            state = PATH_START;
+	            if (stateOverride) return;
+	            continue;
+	          } else {
+	            if (chr == '[') seenBracket = true;
+	            else if (chr == ']') seenBracket = false;
+	            buffer += chr;
+	          } break;
+
+	        case PORT:
+	          if (exec(DIGIT, chr)) {
+	            buffer += chr;
+	          } else if (
+	            chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+	            (chr == '\\' && url.isSpecial()) ||
+	            stateOverride
+	          ) {
+	            if (buffer != '') {
+	              var port = parseInt$1(buffer, 10);
+	              if (port > 0xFFFF) return INVALID_PORT;
+	              url.port = (url.isSpecial() && port === specialSchemes[url.scheme]) ? null : port;
+	              buffer = '';
+	            }
+	            if (stateOverride) return;
+	            state = PATH_START;
+	            continue;
+	          } else return INVALID_PORT;
+	          break;
 
-	    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..
+	        case FILE:
+	          url.scheme = 'file';
+	          if (chr == '/' || chr == '\\') state = FILE_SLASH;
+	          else if (base && base.scheme == 'file') {
+	            if (chr == EOF) {
+	              url.host = base.host;
+	              url.path = arraySlice(base.path);
+	              url.query = base.query;
+	            } else if (chr == '?') {
+	              url.host = base.host;
+	              url.path = arraySlice(base.path);
+	              url.query = '';
+	              state = QUERY;
+	            } else if (chr == '#') {
+	              url.host = base.host;
+	              url.path = arraySlice(base.path);
+	              url.query = base.query;
+	              url.fragment = '';
+	              state = FRAGMENT;
+	            } else {
+	              if (!startsWithWindowsDriveLetter(join(arraySlice(codePoints, pointer), ''))) {
+	                url.host = base.host;
+	                url.path = arraySlice(base.path);
+	                url.shortenPath();
+	              }
+	              state = PATH;
+	              continue;
+	            }
+	          } else {
+	            state = PATH;
+	            continue;
+	          } break;
 
+	        case FILE_SLASH:
+	          if (chr == '/' || chr == '\\') {
+	            state = FILE_HOST;
+	            break;
+	          }
+	          if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(join(arraySlice(codePoints, pointer), ''))) {
+	            if (isWindowsDriveLetter(base.path[0], true)) push(url.path, base.path[0]);
+	            else url.host = base.host;
+	          }
+	          state = PATH;
+	          continue;
 
-	    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..
+	        case FILE_HOST:
+	          if (chr == EOF || chr == '/' || chr == '\\' || chr == '?' || chr == '#') {
+	            if (!stateOverride && isWindowsDriveLetter(buffer)) {
+	              state = PATH;
+	            } else if (buffer == '') {
+	              url.host = '';
+	              if (stateOverride) return;
+	              state = PATH_START;
+	            } else {
+	              failure = url.parseHost(buffer);
+	              if (failure) return failure;
+	              if (url.host == 'localhost') url.host = '';
+	              if (stateOverride) return;
+	              buffer = '';
+	              state = PATH_START;
+	            } continue;
+	          } else buffer += chr;
+	          break;
 
-	    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
+	        case PATH_START:
+	          if (url.isSpecial()) {
+	            state = PATH;
+	            if (chr != '/' && chr != '\\') continue;
+	          } else if (!stateOverride && chr == '?') {
+	            url.query = '';
+	            state = QUERY;
+	          } else if (!stateOverride && chr == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else if (chr != EOF) {
+	            state = PATH;
+	            if (chr != '/') continue;
+	          } break;
 
-	    groups.select('.stroke'); // propagate bound data
+	        case PATH:
+	          if (
+	            chr == EOF || chr == '/' ||
+	            (chr == '\\' && url.isSpecial()) ||
+	            (!stateOverride && (chr == '?' || chr == '#'))
+	          ) {
+	            if (isDoubleDot(buffer)) {
+	              url.shortenPath();
+	              if (chr != '/' && !(chr == '\\' && url.isSpecial())) {
+	                push(url.path, '');
+	              }
+	            } else if (isSingleDot(buffer)) {
+	              if (chr != '/' && !(chr == '\\' && url.isSpecial())) {
+	                push(url.path, '');
+	              }
+	            } else {
+	              if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
+	                if (url.host) url.host = '';
+	                buffer = charAt(buffer, 0) + ':'; // normalize windows drive letter
+	              }
+	              push(url.path, buffer);
+	            }
+	            buffer = '';
+	            if (url.scheme == 'file' && (chr == EOF || chr == '?' || chr == '#')) {
+	              while (url.path.length > 1 && url.path[0] === '') {
+	                shift(url.path);
+	              }
+	            }
+	            if (chr == '?') {
+	              url.query = '';
+	              state = QUERY;
+	            } else if (chr == '#') {
+	              url.fragment = '';
+	              state = FRAGMENT;
+	            }
+	          } else {
+	            buffer += percentEncode(chr, pathPercentEncodeSet);
+	          } break;
 
-	    groups.select('.icon') // propagate bound data
-	    .attr('xlink:href', function (entity) {
-	      var preset = _mainPresetIndex.match(entity, graph);
-	      var picon = preset && preset.icon;
+	        case CANNOT_BE_A_BASE_URL_PATH:
+	          if (chr == '?') {
+	            url.query = '';
+	            state = QUERY;
+	          } else if (chr == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else if (chr != EOF) {
+	            url.path[0] += percentEncode(chr, C0ControlPercentEncodeSet);
+	          } break;
 
-	      if (!picon) {
-	        return '';
-	      } else {
-	        var isMaki = /^maki-/.test(picon);
-	        return '#' + picon + (isMaki ? '-11' : '');
+	        case QUERY:
+	          if (!stateOverride && chr == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else if (chr != EOF) {
+	            if (chr == "'" && url.isSpecial()) url.query += '%27';
+	            else if (chr == '#') url.query += '%23';
+	            else url.query += percentEncode(chr, C0ControlPercentEncodeSet);
+	          } break;
+
+	        case FRAGMENT:
+	          if (chr != EOF) url.fragment += percentEncode(chr, fragmentPercentEncodeSet);
+	          break;
 	      }
-	    }); // Draw touch targets..
 
-	    touchLayer.call(drawTargets, graph, points, filter);
+	      pointer++;
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#host-parsing
+	  parseHost: function (input) {
+	    var result, codePoints, index;
+	    if (charAt(input, 0) == '[') {
+	      if (charAt(input, input.length - 1) != ']') return INVALID_HOST;
+	      result = parseIPv6(stringSlice(input, 1, -1));
+	      if (!result) return INVALID_HOST;
+	      this.host = result;
+	    // opaque host
+	    } else if (!this.isSpecial()) {
+	      if (exec(FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT, input)) return INVALID_HOST;
+	      result = '';
+	      codePoints = arrayFrom(input);
+	      for (index = 0; index < codePoints.length; index++) {
+	        result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
+	      }
+	      this.host = result;
+	    } else {
+	      input = toASCII(input);
+	      if (exec(FORBIDDEN_HOST_CODE_POINT, input)) return INVALID_HOST;
+	      result = parseIPv4(input);
+	      if (result === null) return INVALID_HOST;
+	      this.host = result;
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#cannot-have-a-username-password-port
+	  cannotHaveUsernamePasswordPort: function () {
+	    return !this.host || this.cannotBeABaseURL || this.scheme == 'file';
+	  },
+	  // https://url.spec.whatwg.org/#include-credentials
+	  includesCredentials: function () {
+	    return this.username != '' || this.password != '';
+	  },
+	  // https://url.spec.whatwg.org/#is-special
+	  isSpecial: function () {
+	    return hasOwn(specialSchemes, this.scheme);
+	  },
+	  // https://url.spec.whatwg.org/#shorten-a-urls-path
+	  shortenPath: function () {
+	    var path = this.path;
+	    var pathSize = path.length;
+	    if (pathSize && (this.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+	      path.length--;
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#concept-url-serializer
+	  serialize: function () {
+	    var url = 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 (url.includesCredentials()) {
+	        output += username + (password ? ':' + password : '') + '@';
+	      }
+	      output += serializeHost(host);
+	      if (port !== null) output += ':' + port;
+	    } else if (scheme == 'file') output += '//';
+	    output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+	    if (query !== null) output += '?' + query;
+	    if (fragment !== null) output += '#' + fragment;
+	    return output;
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-href
+	  setHref: function (href) {
+	    var failure = this.parse(href);
+	    if (failure) throw TypeError$1(failure);
+	    this.searchParams.update();
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-origin
+	  getOrigin: function () {
+	    var scheme = this.scheme;
+	    var port = this.port;
+	    if (scheme == 'blob') try {
+	      return new URLConstructor(scheme.path[0]).origin;
+	    } catch (error) {
+	      return 'null';
+	    }
+	    if (scheme == 'file' || !this.isSpecial()) return 'null';
+	    return scheme + '://' + serializeHost(this.host) + (port !== null ? ':' + port : '');
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-protocol
+	  getProtocol: function () {
+	    return this.scheme + ':';
+	  },
+	  setProtocol: function (protocol) {
+	    this.parse($toString(protocol) + ':', SCHEME_START);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-username
+	  getUsername: function () {
+	    return this.username;
+	  },
+	  setUsername: function (username) {
+	    var codePoints = arrayFrom($toString(username));
+	    if (this.cannotHaveUsernamePasswordPort()) return;
+	    this.username = '';
+	    for (var i = 0; i < codePoints.length; i++) {
+	      this.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-password
+	  getPassword: function () {
+	    return this.password;
+	  },
+	  setPassword: function (password) {
+	    var codePoints = arrayFrom($toString(password));
+	    if (this.cannotHaveUsernamePasswordPort()) return;
+	    this.password = '';
+	    for (var i = 0; i < codePoints.length; i++) {
+	      this.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-host
+	  getHost: function () {
+	    var host = this.host;
+	    var port = this.port;
+	    return host === null ? ''
+	      : port === null ? serializeHost(host)
+	      : serializeHost(host) + ':' + port;
+	  },
+	  setHost: function (host) {
+	    if (this.cannotBeABaseURL) return;
+	    this.parse(host, HOST);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-hostname
+	  getHostname: function () {
+	    var host = this.host;
+	    return host === null ? '' : serializeHost(host);
+	  },
+	  setHostname: function (hostname) {
+	    if (this.cannotBeABaseURL) return;
+	    this.parse(hostname, HOSTNAME);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-port
+	  getPort: function () {
+	    var port = this.port;
+	    return port === null ? '' : $toString(port);
+	  },
+	  setPort: function (port) {
+	    if (this.cannotHaveUsernamePasswordPort()) return;
+	    port = $toString(port);
+	    if (port == '') this.port = null;
+	    else this.parse(port, PORT);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-pathname
+	  getPathname: function () {
+	    var path = this.path;
+	    return this.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+	  },
+	  setPathname: function (pathname) {
+	    if (this.cannotBeABaseURL) return;
+	    this.path = [];
+	    this.parse(pathname, PATH_START);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-search
+	  getSearch: function () {
+	    var query = this.query;
+	    return query ? '?' + query : '';
+	  },
+	  setSearch: function (search) {
+	    search = $toString(search);
+	    if (search == '') {
+	      this.query = null;
+	    } else {
+	      if ('?' == charAt(search, 0)) search = stringSlice(search, 1);
+	      this.query = '';
+	      this.parse(search, QUERY);
+	    }
+	    this.searchParams.update();
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-searchparams
+	  getSearchParams: function () {
+	    return this.searchParams.facade;
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-hash
+	  getHash: function () {
+	    var fragment = this.fragment;
+	    return fragment ? '#' + fragment : '';
+	  },
+	  setHash: function (hash) {
+	    hash = $toString(hash);
+	    if (hash == '') {
+	      this.fragment = null;
+	      return;
+	    }
+	    if ('#' == charAt(hash, 0)) hash = stringSlice(hash, 1);
+	    this.fragment = '';
+	    this.parse(hash, FRAGMENT);
+	  },
+	  update: function () {
+	    this.query = this.searchParams.serialize() || null;
 	  }
+	};
 
-	  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;
+	// `URL` constructor
+	// https://url.spec.whatwg.org/#url-class
+	var URLConstructor = function URL(url /* , base */) {
+	  var that = anInstance(this, URLPrototype);
+	  var base = validateArgumentsLength(arguments.length, 1) > 1 ? arguments[1] : undefined;
+	  var state = setInternalState(that, new URLState(url, false, base));
+	  if (!DESCRIPTORS) {
+	    that.href = state.serialize();
+	    that.origin = state.getOrigin();
+	    that.protocol = state.getProtocol();
+	    that.username = state.getUsername();
+	    that.password = state.getPassword();
+	    that.host = state.getHost();
+	    that.hostname = state.getHostname();
+	    that.port = state.getPort();
+	    that.pathname = state.getPathname();
+	    that.search = state.getSearch();
+	    that.searchParams = state.getSearchParams();
+	    that.hash = state.getHash();
 	  }
+	};
 
-	  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
+	var URLPrototype = URLConstructor.prototype;
 
-	      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 accessorDescriptor = function (getter, setter) {
+	  return {
+	    get: function () {
+	      return getInternalURLState(this)[getter]();
+	    },
+	    set: setter && function (value) {
+	      return getInternalURLState(this)[setter](value);
+	    },
+	    configurable: true,
+	    enumerable: true
+	  };
+	};
 
-	      return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
-	    }
+	if (DESCRIPTORS) {
+	  defineProperties(URLPrototype, {
+	    // `URL.prototype.href` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-href
+	    href: accessorDescriptor('serialize', 'setHref'),
+	    // `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', 'setProtocol'),
+	    // `URL.prototype.username` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-username
+	    username: accessorDescriptor('getUsername', 'setUsername'),
+	    // `URL.prototype.password` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-password
+	    password: accessorDescriptor('getPassword', 'setPassword'),
+	    // `URL.prototype.host` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-host
+	    host: accessorDescriptor('getHost', 'setHost'),
+	    // `URL.prototype.hostname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hostname
+	    hostname: accessorDescriptor('getHostname', 'setHostname'),
+	    // `URL.prototype.port` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-port
+	    port: accessorDescriptor('getPort', 'setPort'),
+	    // `URL.prototype.pathname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-pathname
+	    pathname: accessorDescriptor('getPathname', 'setPathname'),
+	    // `URL.prototype.search` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-search
+	    search: accessorDescriptor('getSearch', 'setSearch'),
+	    // `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', 'setHash')
+	  });
+	}
 
-	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-	    var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	redefine(URLPrototype, 'toJSON', function toJSON() {
+	  return getInternalURLState(this).serialize();
+	}, { enumerable: true });
 
-	    var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
-	      return d.key;
-	    }); // exit
+	// `URL.prototype.toString` method
+	// https://url.spec.whatwg.org/#URL-stringification-behavior
+	redefine(URLPrototype, 'toString', function toString() {
+	  return getInternalURLState(this).serialize();
+	}, { enumerable: true });
 
-	    groups.exit().remove(); // enter
+	if (NativeURL) {
+	  var nativeCreateObjectURL = NativeURL.createObjectURL;
+	  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
+	  // `URL.createObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
+	  if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', bind$2(nativeCreateObjectURL, NativeURL));
+	  // `URL.revokeObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
+	  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', bind$2(nativeRevokeObjectURL, NativeURL));
+	}
 
-	    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
+	setToStringTag(URLConstructor, 'URL');
 
-	    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
+	$({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {
+	  URL: URLConstructor
+	});
 
-	    groups.select('circle'); // propagate bound data
-	    // Draw touch targets..
+	function uiFieldText(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var input = select(null);
+	  var outlinkButton = select(null);
+	  var wrap = select(null);
+	  var _entityIDs = [];
 
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	    groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
-	      return d.key;
-	    }); // exit
+	  var _tags;
 
-	    groups.exit().remove(); // enter
+	  var _phoneFormats = {};
 
-	    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;
+	  if (field.type === 'tel') {
+	    _mainFileFetcher.get('phone_formats').then(function (d) {
+	      _phoneFormats = d;
+	      updatePhonePlaceholder();
+	    })["catch"](function () {
+	      /* ignore */
 	    });
-	    uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
-
-	    groups = groups.merge(groupsEnter).attr('transform', turnTransform);
-	    groups.select('rect'); // propagate bound data
-
-	    groups.select('circle'); // propagate bound data
-
-	    return this;
 	  }
 
-	  return drawTurns;
-	}
-
-	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]
-	  };
-
-	  var _currHoverTarget;
+	  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
 
-	  var _currPersistent = {};
-	  var _currHover = {};
-	  var _prevHover = {};
-	  var _currSelected = {};
-	  var _prevSelected = {};
-	  var _radii = {};
+	      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
 
-	  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.
+	      var which = field.id; // 'brand', 'network', 'operator', 'flag'
 
+	      return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+	    });
 
-	  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);
+	    field.locked(isLocked);
 	  }
 
-	  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 i(selection) {
+	    calcLocked();
+	    var isLocked = field.locked();
+	    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 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;
-	    }
+	    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;
+	      }).attr('title', function (d) {
+	        var which = d > 0 ? 'increment' : 'decrement';
+	        return _t("inspector.".concat(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);
 
-	    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 (domainResults.length >= 2 && domainResults[1]) {
+	          var domain = domainResults[1];
+	          return _t('icons.view_on', {
+	            domain: domain
+	          });
+	        }
 
-	          if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-	            r += 1.5;
-	          }
+	        return '';
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
 
-	          if (klass === 'shadow') {
-	            // remember this value, so we don't need to
-	            _radii[entity.id] = r; // recompute it when we draw the touch targets
-	          }
+	        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);
+	    } else if (field.key.split(':').includes('colour')) {
+	      input.attr('type', 'text');
+	      updateColourPreview();
+	    }
+	  }
 
-	          select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
-	        });
-	      });
+	  function isColourValid(colour) {
+	    if (!colour.match(/^(#([0-9a-fA-F]{3}){1,2}|\w+)$/)) {
+	      // OSM only supports hex or named colors
+	      return false;
+	    } else if (!CSS.supports('color', colour) || ['unset', 'inherit', 'initial', 'revert'].includes(colour)) {
+	      // see https://stackoverflow.com/a/68217760/1627467
+	      return false;
 	    }
 
-	    vertices.sort(sortY);
-	    var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
+	    return true;
+	  }
 
-	    groups.exit().remove(); // enter
+	  function updateColourPreview() {
+	    wrap.selectAll('.colour-preview').remove();
+	    var colour = utilGetSetValue(input);
+	    if (!isColourValid(colour) && colour !== '') return;
+	    var colourSelector = wrap.selectAll('.colour-selector').data([0]);
+	    outlinkButton = wrap.selectAll('.colour-preview').data([colour]);
+	    colourSelector.enter().append('input').attr('type', 'color').attr('class', 'form-field-button colour-selector').attr('value', colour).on('input', debounce(function (d3_event) {
+	      d3_event.preventDefault();
+	      var colour = this.value;
+	      if (!isColourValid(colour)) return;
+	      utilGetSetValue(input, this.value);
+	      change()();
+	      updateColourPreview();
+	    }, 100));
+	    outlinkButton = outlinkButton.enter().append('div').attr('class', 'form-field-button colour-preview').append('div').style('background-color', function (d) {
+	      return d;
+	    }).attr('class', 'colour-box');
 
-	    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.
+	    if (colour === '') {
+	      outlinkButton = outlinkButton.call(svgIcon('#iD-icon-edit'));
+	    }
 
-	    enter.filter(function (d) {
-	      return d.hasInterestingTags();
-	    }).append('circle').attr('class', 'fill'); // update
+	    outlinkButton.on('click', function () {
+	      return wrap.select('.colour-selector').node().click();
+	    }).merge(outlinkButton);
+	  }
 
-	    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`.
+	  function updatePhonePlaceholder() {
+	    if (input.empty() || !Object.keys(_phoneFormats).length) return;
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
 
-	    var iconUse = groups.selectAll('.icon').data(function data(d) {
-	      return zoom >= 17 && getIcon(d) ? [d] : [];
-	    }, fastEntityKey); // exit
+	    var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
 
-	    iconUse.exit().remove(); // enter
+	    if (format) input.attr('placeholder', format);
+	  }
 
-	    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
+	  function validIdentifierValueForLink() {
+	    var value = utilGetSetValue(input).trim();
 
-	    var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
-	      return zoom >= 18 && getDirections(d) ? [d] : [];
-	    }, fastEntityKey); // exit
+	    if (field.type === 'url' && value) {
+	      try {
+	        return new URL(value).href;
+	      } catch (e) {
+	        return null;
+	      }
+	    }
 
-	    dgroups.exit().remove(); // enter/update
+	    if (field.type === 'identifier' && field.pattern) {
+	      return value && value.match(new RegExp(field.pattern))[0];
+	    }
 
-	    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
+	    return null;
+	  } // clamp number to min/max
 
-	    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 clamped(num) {
+	    if (field.minValue !== undefined) {
+	      num = Math.max(num, field.minValue);
+	    }
 
-	  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
+	    if (field.maxValue !== undefined) {
+	      num = Math.min(num, field.maxValue);
+	    }
 
-	      var vertexType = svgPassiveVertex(node, graph, activeID);
+	    return num;
+	  }
 
-	      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 change(onInput) {
+	    return function () {
+	      var t = {};
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	    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
+	      if (!val && Array.isArray(_tags[field.key])) return;
 
-	    targets.exit().remove(); // enter/update
+	      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(';');
+	        }
 
-	    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
+	        utilGetSetValue(input, val);
+	      }
 
-	    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
+	      t[field.key] = val || undefined;
+	      dispatch.call('change', this, t, onInput);
+	    };
+	  }
 
-	    nopes.exit().remove(); // enter/update
+	  i.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return i;
+	  };
 
-	    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
+	  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);
+	    if (field.key.split(':').includes('colour')) updateColourPreview();
 
+	    if (outlinkButton && !outlinkButton.empty()) {
+	      var disabled = !validIdentifierValueForLink();
+	      outlinkButton.classed('disabled', disabled);
+	    }
+	  };
 
-	  function renderAsVertex(entity, graph, wireframe, zoom) {
-	    var geometry = entity.geometry(graph);
-	    return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
-	  }
+	  i.focus = function () {
+	    var node = input.node();
+	    if (node) node.focus();
+	  };
 
-	  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 combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
 
-	  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]);
+	  return utilRebind(i, dispatch, 'on');
+	}
 
-	            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);
+	function uiFieldAccess(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var items = select(null);
 
-	            if (member) {
-	              addChildVertices(member);
-	            }
-	          }
-	        } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	          results[entity.id] = entity;
-	        }
-	      }
-	    }
+	  var _tags;
 
-	    ids.forEach(function (id) {
-	      var entity = graph.hasEntity(id);
-	      if (!entity) return;
+	  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
 
-	      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);
-	      }
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-access-' + d;
 	    });
-	    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');
+	    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
 
-	    if (fullRedraw) {
-	      _currPersistent = {};
-	      _radii = {};
-	    } // Collect important vertices from the `entities` list..
-	    // (during a partial redraw, it will not contain everything)
+	    items = items.merge(enter);
+	    wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+	  }
 
+	  function change(d3_event, d) {
+	    var tag = {};
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-	    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 (!value && typeof _tags[d] !== 'string') return;
+	    tag[d] = value || undefined;
+	    dispatch.call('change', this, tag);
+	  }
 
-	      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..
+	  access.options = function (type) {
+	    var options = ['no', 'permissive', 'private', 'permit', 'destination', 'customers', 'unknown'];
 
+	    if (type !== 'access') {
+	      options.unshift('yes');
+	      options.push('designated');
 
-	      if (!keep && !fullRedraw) {
-	        delete _currPersistent[entity.id];
+	      if (type === 'bicycle') {
+	        options.push('dismount');
 	      }
-	    } // 3 sets of vertices to consider:
+	    }
 
+	    return options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	    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 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'
+	    }
+	  };
 
-	    };
-	    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.
+	  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');
+	      }
 
-	    var filterRendered = function filterRendered(d) {
-	      return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-	    };
+	      if (d === 'access') {
+	        return 'yes';
+	      }
 
-	    drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
-	    // When drawing, render all targets (not just those affected by a partial redraw)
+	      if (tags.access && typeof tags.access === 'string') {
+	        return tags.access;
+	      }
 
-	    var filterTouch = function filterTouch(d) {
-	      return isMoving ? true : filterRendered(d);
-	    };
+	      if (tags.highway) {
+	        if (typeof tags.highway === 'string') {
+	          if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+	            return placeholdersByHighway[tags.highway][d];
+	          }
+	        } else {
+	          var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+	            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+	          }).filter(Boolean);
 
-	    touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
+	          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];
+	          }
+	        }
+	      }
 
-	    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..
+	      return field.placeholder();
+	    });
+	  };
 
+	  access.focus = function () {
+	    items.selectAll('.preset-input-access').node().focus();
+	  };
 
-	  drawVertices.drawSelected = function (selection, graph, extent) {
-	    var wireframe = context.surface().classed('fill-wireframe');
-	    var zoom = geoScaleToZoom(projection.scale());
-	    _prevSelected = _currSelected || {};
+	  return utilRebind(access, dispatch, 'on');
+	}
 
-	    if (context.map().isInWideSelection()) {
-	      _currSelected = {};
-	      context.selectedIDs().forEach(function (id) {
-	        var entity = graph.hasEntity(id);
-	        if (!entity) return;
+	function uiFieldAddress(field, context) {
+	  var dispatch = dispatch$8('change');
 
-	        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..
+	  var _selection = select(null);
 
+	  var _wrap = select(null);
 
-	    var filter = function filter(d) {
-	      return d.id in _prevSelected;
-	    };
+	  var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-	    drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-	  }; // partial redraw - only update the hovered items..
+	  var _entityIDs = [];
 
+	  var _tags;
 
-	  drawVertices.drawHover = function (selection, graph, target, extent) {
-	    if (target === _currHoverTarget) return; // continue only if something changed
+	  var _countryCode;
 
-	    var wireframe = context.surface().classed('fill-wireframe');
-	    var zoom = geoScaleToZoom(projection.scale());
-	    _prevHover = _currHover || {};
-	    _currHoverTarget = target;
-	    var entity = target && target.properties && target.properties.entity;
+	  var _addressFormats = [{
+	    format: [['housenumber', 'street'], ['city', 'postcode']]
+	  }];
+	  _mainFileFetcher.get('address_formats').then(function (d) {
+	    _addressFormats = d;
 
-	    if (entity) {
-	      _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-	    } else {
-	      _currHover = {};
-	    } // note that drawVertices will add `_currHover` automatically if needed..
+	    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;
+	    });
+	    return utilArrayUniqBy(streets, 'value');
 
-	    var filter = function filter(d) {
-	      return d.id in _prevHover;
-	    };
+	    function isAddressable(d) {
+	      return d.tags.highway && d.tags.name && d.type === 'way';
+	    }
+	  }
 
-	    drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-	  };
+	  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');
 
-	  return drawVertices;
-	}
+	    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;
+	      }
 
-	function utilBindOnce(target, type, listener, capture) {
-	  var typeOnce = type + '.once';
+	      if (d.tags['addr:city']) return true;
+	      return false;
+	    }
+	  }
 
-	  function one() {
-	    target.on(typeOnce, null);
-	    listener.apply(this, arguments);
+	  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');
 	  }
 
-	  target.on(typeOnce, one, capture);
-	  return this;
-	}
+	  function updateForCountryCode() {
+	    if (!_countryCode) return;
+	    var addressFormat;
 
-	function defaultFilter$2(d3_event) {
-	  return !d3_event.ctrlKey && !d3_event.button;
-	}
+	    for (var i = 0; i < _addressFormats.length; i++) {
+	      var format = _addressFormats[i];
 
-	function defaultExtent$1() {
-	  var e = this;
+	      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
 
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
+	        break;
+	      }
+	    }
 
-	    if (e.hasAttribute('viewBox')) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    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
+	    };
+
+	    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
+	        };
+	      });
 	    }
 
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-	  }
+	    var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+	      return d.toString();
+	    });
 
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
-	}
+	    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 + '%';
+	    });
 
-	function defaultWheelDelta$1(d3_event) {
-	  return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
-	}
+	    function addDropdown(d) {
+	      if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-	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));
-	}
+	      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));
+	      }));
+	    }
 
-	function utilZoomPan() {
-	  var filter = defaultFilter$2,
-	      extent = defaultExtent$1,
-	      constrain = defaultConstrain$1,
-	      wheelDelta = defaultWheelDelta$1,
-	      scaleExtent = [0, Infinity],
-	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-	      interpolate = interpolateZoom,
-	      dispatch$1 = dispatch('start', 'zoom', 'end'),
-	      _wheelDelay = 150,
-	      _transform = identity$2,
-	      _activeGesture;
+	    _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-	  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);
+	    _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
+
+	    if (_tags) updateTags(_tags);
 	  }
 
-	  zoom.transform = function (collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
+	  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();
 
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
-	    } else {
-	      selection.interrupt().each(function () {
-	        gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
-	      });
-	    }
-	  };
+	    if (extent) {
+	      var countryCode;
 
-	  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);
-	  };
+	      if (context.inIntro()) {
+	        // localize the address format for the walkthrough
+	        countryCode = _t('intro.graph.countrycode');
+	      } else {
+	        var center = extent.center();
+	        countryCode = iso1A2Code(center);
+	      }
 
-	  zoom.scaleTo = function (selection, k, p) {
-	    zoom.transform(selection, function () {
-	      var e = extent.apply(this, arguments),
-	          t0 = _transform,
-	          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);
-	  };
+	      if (countryCode) {
+	        _countryCode = countryCode.toLowerCase();
+	        updateForCountryCode();
+	      }
+	    }
+	  }
 
-	  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);
-	    });
-	  };
+	  function change(onInput) {
+	    return function () {
+	      var tags = {};
 
-	  zoom.translateTo = function (selection, x, y, p) {
-	    zoom.transform(selection, function () {
-	      var e = extent.apply(this, arguments),
-	          t = _transform,
-	          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);
-	  };
+	      _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
 
-	  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);
-	  }
+	        if (Array.isArray(_tags[key]) && !value) return;
+	        tags[key] = value || undefined;
+	      });
 
-	  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);
+	      dispatch.call('change', this, tags, onInput);
+	    };
 	  }
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
+	  function updatePlaceholder(inputSelection) {
+	    return inputSelection.attr('placeholder', function (subfield) {
+	      if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	  function schedule(transition, transform, point) {
-	    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) 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, null, t);
-	      };
+	      if (_countryCode) {
+	        var localkey = subfield.id + '!' + _countryCode;
+	        var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+	        return addrField.t('placeholders.' + tkey);
+	      }
 	    });
 	  }
 
-	  function gesture(that, args, clean) {
-	    return !clean && _activeGesture || new Gesture(that, args);
+	  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') : undefined;
+	    }).classed('mixed', function (subfield) {
+	      return Array.isArray(tags[field.key + ':' + subfield.id]);
+	    }).call(updatePlaceholder);
 	  }
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
 
-	  Gesture.prototype = {
-	    start: function start(d3_event) {
-	      if (++this.active === 1) {
-	        _activeGesture = this;
-	        dispatch$1.call('start', this, d3_event);
-	      }
-
-	      return this;
-	    },
-	    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;
-	      dispatch$1.call('zoom', this, d3_event, key, transform);
-	      return this;
-	    },
-	    end: function end(d3_event) {
-	      if (--this.active === 0) {
-	        _activeGesture = null;
-	        dispatch$1.call('end', this, d3_event);
-	      }
+	  address.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return address;
+	  };
 
-	      return this;
-	    }
+	  address.tags = function (tags) {
+	    _tags = tags;
+	    updateTags(tags);
 	  };
 
-	  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)(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.
+	  address.focus = function () {
+	    var node = _wrap.selectAll('input').node();
 
-	    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 (node) node.focus();
+	  };
 
-	      clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
-	    } else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start(d3_event);
-	    }
+	  return utilRebind(address, dispatch, 'on');
+	}
 
-	    d3_event.preventDefault();
-	    d3_event.stopImmediatePropagation();
-	    g.wheel = setTimeout(wheelidled, _wheelDelay);
-	    g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	function uiFieldCycleway(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var items = select(null);
+	  var wrap = select(null);
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end(d3_event);
+	  var _tags;
+
+	  function cycleway(selection) {
+	    function stripcolon(s) {
+	      return s.replace(':', '');
 	    }
-	  }
 
-	  var _downPointerIDs = new Set();
+	    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 _pointerLocGetter;
+	    wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+	  }
 
-	  function pointerdown(d3_event) {
-	    _downPointerIDs.add(d3_event.pointerId);
+	  function change(d3_event, key) {
+	    var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-	    if (!filter.apply(this, arguments)) return;
-	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
-	    var started;
-	    d3_event.stopImmediatePropagation();
-	    _pointerLocGetter = utilFastMouse(this);
+	    if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-	    var loc = _pointerLocGetter(d3_event);
+	    if (newValue === 'none' || newValue === '') {
+	      newValue = undefined;
+	    }
 
-	    var p = [loc, _transform.invert(loc), d3_event.pointerId];
+	    var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+	    var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
-	    if (!g.pointer0) {
-	      g.pointer0 = p;
-	      started = true;
-	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-	      g.pointer1 = p;
+	    if (otherValue && Array.isArray(otherValue)) {
+	      // we must always have an explicit value for comparison
+	      otherValue = otherValue[0];
 	    }
 
-	    if (started) {
-	      interrupt(this);
-	      g.start(d3_event);
+	    if (otherValue === 'none' || otherValue === '') {
+	      otherValue = undefined;
 	    }
-	  }
 
-	  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 tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+	    // sides the same way
 
-	    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(d3_event);
-	      return;
+	    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;
 	    }
 
-	    d3_event.preventDefault();
-	    d3_event.stopImmediatePropagation();
-
-	    var loc = _pointerLocGetter(d3_event);
-
-	    var t, p, l;
-	    if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
-	    t = _transform;
+	    dispatch.call('change', this, tag);
+	  }
 
-	    if (g.pointer1) {
-	      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));
-	      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.pointer0) {
-	      p = g.pointer0[0];
-	      l = g.pointer0[1];
-	    } else return;
+	  cycleway.options = function () {
+	    return field.options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	    g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
+	  cycleway.tags = function (tags) {
+	    _tags = tags; // If cycleway is set, use that instead of individual values
 
-	  function pointerup(d3_event) {
-	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
+	    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 = [];
 
-	    _downPointerIDs["delete"](d3_event.pointerId);
+	        if (Array.isArray(tags.cycleway)) {
+	          vals = vals.concat(tags.cycleway);
+	        }
 
-	    if (!_activeGesture) return;
-	    var g = gesture(this, arguments);
-	    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 (Array.isArray(tags[d])) {
+	          vals = vals.concat(tags[d]);
+	        }
 
-	    if (g.pointer1 && !g.pointer0) {
-	      g.pointer0 = g.pointer1;
-	      delete g.pointer1;
-	    }
+	        return vals.filter(Boolean).join('\n');
+	      }
 
-	    if (g.pointer0) g.pointer0[1] = _transform.invert(g.pointer0[0]);else {
-	      g.end(d3_event);
-	    }
-	  }
+	      return null;
+	    }).attr('placeholder', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	  zoom.wheelDelta = function (_) {
-	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+	      return field.placeholder();
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+	    });
 	  };
 
-	  zoom.filter = function (_) {
-	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+	  cycleway.focus = function () {
+	    var node = wrap.selectAll('input').node();
+	    if (node) node.focus();
 	  };
 
-	  zoom.extent = function (_) {
-	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-	  };
+	  return utilRebind(cycleway, dispatch, 'on');
+	}
 
-	  zoom.scaleExtent = function (_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-	  };
+	function uiFieldLanes(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var LANE_WIDTH = 40;
+	  var LANE_HEIGHT = 200;
+	  var _entityIDs = [];
 
-	  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 lanes(selection) {
+	    var lanesData = context.entity(_entityIDs[0]).lanes();
 
-	  zoom.constrain = function (_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	    if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+	      selection.call(lanes.off);
+	      return;
+	    }
 
-	  zoom.interpolate = function (_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	    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).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)';
+	    });
+	    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';
+	    });
+	  }
 
-	  zoom._transform = function (_) {
-	    return arguments.length ? (_transform = _, zoom) : _transform;
+	  lanes.entityIDs = function (val) {
+	    _entityIDs = val;
 	  };
 
-	  return utilRebind(zoom, dispatch$1, 'on');
+	  lanes.tags = function () {};
+
+	  lanes.focus = function () {};
+
+	  lanes.off = function () {};
+
+	  return utilRebind(lanes, dispatch, 'on');
 	}
+	uiFieldLanes.supportsMultiselection = false;
 
-	// if pointer events are supported. Falls back to default `dblclick` event.
+	var _languagesArray = [];
+	function uiFieldLocalized(field, context) {
+	  var dispatch = dispatch$8('change', 'input');
+	  var wikipedia = services.wikipedia;
+	  var input = select(null);
+	  var localizedInputs = select(null);
 
-	function utilDoubleUp() {
-	  var dispatch$1 = dispatch('doubleUp');
-	  var _maxTimespan = 500; // milliseconds
+	  var _countryCode;
 
-	  var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
+	  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.
 
-	  var _pointer; // object representing the pointer that could trigger double up
 
+	  _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 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 langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
 
-	  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
+	  var _selection = select(null);
 
-	    if (_pointer && !pointerIsValidFor(loc)) {
-	      // if this pointer is no longer valid, clear it so another can be started
-	      _pointer = undefined;
-	    }
+	  var _multilingual = [];
 
-	    if (!_pointer) {
-	      _pointer = {
-	        startLoc: loc,
-	        startTime: new Date().getTime(),
-	        upCount: 0,
-	        pointerId: d3_event.pointerId
-	      };
-	    } else {
-	      // double down
-	      _pointer.pointerId = d3_event.pointerId;
-	    }
-	  }
+	  var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-	  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;
+	  var _wikiTitles;
 
-	    if (_pointer.upCount === 2) {
-	      // double up!
-	      var loc = [d3_event.clientX, d3_event.clientY];
+	  var _entityIDs = [];
 
-	      if (pointerIsValidFor(loc)) {
-	        var locInThis = utilFastMouse(this)(d3_event);
-	        dispatch$1.call('doubleUp', this, d3_event, locInThis);
-	      } // clear the pointer info in any case
+	  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
 
-	      _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 (d3_event) {
-	        dispatch$1.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
+	    for (var code in dataLanguages) {
+	      if (replacements[code] === false) continue;
+	      var metaCode = code;
+	      if (replacements[code]) metaCode = replacements[code];
+
+	      _languagesArray.push({
+	        localName: _mainLocalizer.languageName(metaCode, {
+	          localOnly: true
+	        }),
+	        nativeName: dataLanguages[metaCode].nativeName,
+	        code: code,
+	        label: _mainLocalizer.languageName(metaCode)
 	      });
 	    }
 	  }
 
-	  doubleUp.off = function (selection) {
-	    selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
-	  };
+	  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
 
-	  return utilRebind(doubleUp, dispatch$1, 'on');
-	}
+	      if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched
 
-	var TILESIZE = 256;
-	var minZoom = 2;
-	var maxZoom = 24;
-	var kMin = geoZoomToScale(minZoom, TILESIZE);
-	var kMax = geoZoomToScale(maxZoom, TILESIZE);
+	      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`
 
-	function clamp(num, min, max) {
-	  return Math.max(min, Math.min(num, max));
-	}
+	      var preset = _mainPresetIndex.match(entity, context.graph());
 
-	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;
+	      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);
+	      }
 
-	  var _selection = select(null);
+	      return false;
+	    });
 
-	  var supersurface = select(null);
-	  var wrapper = select(null);
-	  var surface = select(null);
-	  var _dimensions = [1, 1];
-	  var _dblClickZoomEnabled = true;
-	  var _redrawEnabled = true;
+	    field.locked(isLocked);
+	  } // update _multilingual, maintaining the existing order
 
-	  var _gestureTransformStart;
 
-	  var _transformStart = projection.transform();
+	  function calcMultilingual(tags) {
+	    var existingLangsOrdered = _multilingual.map(function (item) {
+	      return item.lang;
+	    });
 
-	  var _transformLast;
+	    var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-	  var _isTransformed = false;
-	  var _minzoom = 0;
+	    for (var k in tags) {
+	      var m = k.match(/^(.*):(.*)$/);
 
-	  var _getMouseCoords;
+	      if (m && m[1] === field.key && m[2]) {
+	        var item = {
+	          lang: m[2],
+	          value: tags[k]
+	        };
 
-	  var _lastPointerEvent;
+	        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
 
-	  var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
+	    _multilingual.forEach(function (item) {
+	      if (item.lang && existingLangs.has(item.lang)) {
+	        item.value = '';
+	      }
+	    });
+	  }
 
-	  var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
+	  function localized(selection) {
+	    _selection = selection;
+	    calcLocked();
+	    var isLocked = field.locked();
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
+	    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);
+	    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').attr('aria-label', _t('icons.plus')).call(svgIcon('#iD-icon-plus')).merge(translateButton);
+	    translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
 
-	  var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
+	    if (_tags && !_multilingual.length) {
+	      calcMultilingual(_tags);
+	    }
 
-	  var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate).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;
-	  });
+	    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);
+	    selection.selectAll('.combobox-caret').classed('nope', true);
 
-	  var _doubleUpHandler = utilDoubleUp();
+	    function addNew(d3_event) {
+	      d3_event.preventDefault();
+	      if (field.locked()) return;
+	      var defaultLang = _mainLocalizer.languageCode().toLowerCase();
 
-	  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 });
-	  // }
+	      var langExists = _multilingual.find(function (datum) {
+	        return datum.lang === defaultLang;
+	      });
 
+	      var isLangEn = defaultLang.indexOf('en') > -1;
 
-	  function cancelPendingRedraw() {
-	    scheduleRedraw.cancel(); // isRedrawScheduled = false;
-	    // window.cancelIdleCallback(pendingRedrawCall);
-	  }
+	      if (isLangEn || langExists) {
+	        defaultLang = '';
+	        langExists = _multilingual.find(function (datum) {
+	          return datum.lang === defaultLang;
+	        });
+	      }
 
-	  function map(selection) {
-	    _selection = selection;
-	    context.on('change.map', immediateRedraw);
-	    var osm = context.connection();
+	      if (!langExists) {
+	        // prepend the value so it appears at the top
+	        _multilingual.unshift({
+	          lang: defaultLang,
+	          value: ''
+	        });
 
-	    if (osm) {
-	      osm.on('change.map', immediateRedraw);
+	        localizedInputs.call(renderMultilingual);
+	      }
 	    }
 
-	    function didUndoOrRedo(targetTransform) {
-	      var mode = context.mode().id;
-	      if (mode !== 'browse' && mode !== 'select') return;
+	    function change(onInput) {
+	      return function (d3_event) {
+	        if (field.locked()) {
+	          d3_event.preventDefault();
+	          return;
+	        }
 
-	      if (targetTransform) {
-	        map.transformEase(targetTransform);
-	      }
+	        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.call('change', this, t, onInput);
+	      };
 	    }
+	  }
 
-	    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();
+	  function key(lang) {
+	    return field.key + ':' + lang;
+	  }
+
+	  function changeLang(d3_event, 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;
 	    });
-	    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.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
+	    if (language) lang = language.code;
 
-	    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;
+	    if (d.lang && d.lang !== lang) {
+	      tags[key(d.lang)] = undefined;
+	    }
 
-	      if (d3_event.button === 2) {
-	        d3_event.stopPropagation();
-	      }
-	    }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
-	      _lastPointerEvent = d3_event;
+	    var newKey = lang && context.cleanTagKey(key(lang));
+	    var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
 
-	      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$1.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$1.call('drawn', this, {
-	          full: false
-	        });
-	      }
-	    });
-	    var detected = utilDetect(); // only WebKit supports gesture events
+	    if (newKey && value) {
+	      tags[newKey] = value;
+	    } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+	      tags[newKey] = _wikiTitles[d.lang];
+	    }
 
-	    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
+	    d.lang = lang;
+	    dispatch.call('change', this, tags);
+	  }
 
+	  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
 
-	    updateAreaFill();
+	    if (!value && Array.isArray(d.value)) return;
+	    var t = {};
+	    t[key(d.lang)] = value;
+	    d.value = value;
+	    dispatch.call('change', this, t);
+	  }
 
-	    _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
-	      if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+	  function fetchLanguages(value, cb) {
+	    var v = value.toLowerCase(); // show the user's language first
 
-	      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);
+	    var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+
+	    if (_countryCode && _territoryLanguages[_countryCode]) {
+	      langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+	    }
+
+	    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
+	      };
+	    }));
+	  }
+
+	  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').call(_t.append('translate.localized_translation_label'));
+	      text.append('span').attr('class', 'label-textannotation');
+	      label.append('button').attr('class', 'remove-icon-multilingual').attr('title', _t('icons.remove')).on('click', function (d3_event, d) {
+	        if (field.locked()) return;
+	        d3_event.preventDefault(); // remove the UI item manually
 
-	    context.on('enter.map', function () {
-	      if (!map.editableDataEnabled(true
-	      /* skip zoom check */
-	      )) return; // redraw immediately any objects affected by a change in selectedIDs.
+	        _multilingual.splice(_multilingual.indexOf(d), 1);
 
-	      var graph = context.graph();
-	      var selectedAndParents = {};
-	      context.selectedIDs().forEach(function (id) {
-	        var entity = graph.hasEntity(id);
+	        var langKey = d.lang && key(d.lang);
 
-	        if (entity) {
-	          selectedAndParents[entity.id] = entity;
+	        if (langKey && langKey in _tags) {
+	          delete _tags[langKey]; // remove from entity tags
 
-	          if (entity.type === 'node') {
-	            graph.parentWays(entity).forEach(function (parent) {
-	              selectedAndParents[parent.id] = parent;
-	            });
-	          }
+	          var t = {};
+	          t[langKey] = undefined;
+	          dispatch.call('change', this, t);
+	          return;
 	        }
-	      });
-	      var data = Object.values(selectedAndParents);
 
-	      var filter = function filter(d) {
-	        return d.id in selectedAndParents;
-	      };
+	        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
 
-	      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
+	    entries.classed('present', true);
+	    utilGetSetValue(entries.select('.localized-lang'), function (d) {
+	      var langItem = _languagesArray.find(function (item) {
+	        return item.code === d.lang;
+	      });
 
-	      scheduleRedraw();
+	      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);
 	    });
-	    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;
+	  localized.tags = function (tags) {
+	    _tags = tags; // Fetch translations from wikipedia
 
-	      for (var i = 0; i < listeners.length; i++) {
-	        var listener = listeners[i];
+	    if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+	      _wikiTitles = {};
+	      var wm = tags.wikipedia.match(/([^:]+):(.+)/);
 
-	        if (listener.name === 'zoom' && listener.type === 'mouseup') {
-	          hasOrphan = true;
-	          break;
-	        }
+	      if (wm && wm[0] && wm[1]) {
+	        wikipedia.translations(wm[1], wm[2], function (err, d) {
+	          if (err || !d) return;
+	          _wikiTitles = d;
+	        });
 	      }
+	    }
 
-	      if (hasOrphan) {
-	        var event = window.CustomEvent;
+	    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);
 
-	        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.
+	    _selection.call(localized);
+	  };
 
+	  localized.focus = function () {
+	    input.node().focus();
+	  };
 
-	        event.view = window;
-	        window.dispatchEvent(event);
-	      }
-	    }
+	  localized.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _multilingual = [];
+	    loadCountryCode();
+	    return localized;
+	  };
 
-	    return d3_event.button !== 2; // ignore right clicks
+	  function loadCountryCode() {
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
+	    _countryCode = countryCode && countryCode.toLowerCase();
 	  }
 
-	  function pxCenter() {
-	    return [_dimensions[0] / 2, _dimensions[1] / 2];
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
 
-	  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;
+	  return utilRebind(localized, dispatch, 'on');
+	}
 
-	    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
+	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 = [];
 
-	      applyFeatureLayerFilters = false;
-	    } else if (difference) {
-	      var complete = difference.complete(map.extent());
-	      data = Object.values(complete).filter(Boolean);
-	      set = new Set(Object.keys(complete));
+	  var _tags;
 
-	      filter = function filter(d) {
-	        return set.has(d.id);
-	      };
+	  var _isImperial;
 
-	      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;
-	      }
+	  var primaryUnits = [{
+	    value: 'm',
+	    title: _t('inspector.roadheight.meter')
+	  }, {
+	    value: 'ft',
+	    title: _t('inspector.roadheight.foot')
+	  }];
+	  var unitCombo = uiCombobox(context, 'roadheight-unit').data(primaryUnits);
 
-	      if (extent) {
-	        data = context.history().intersects(map.extent().intersection(extent));
-	        set = new Set(data.map(function (entity) {
-	          return entity.id;
-	        }));
+	  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);
 
-	        filter = function filter(d) {
-	          return set.has(d.id);
-	        };
-	      } else {
-	        data = all;
-	        fullRedraw = true;
-	        filter = utilFunctor(true);
-	      }
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(primaryUnitInput) === 'ft';
+	      utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+	      setUnitSuggestions();
+	      change();
 	    }
+	  }
 
-	    if (applyFeatureLayerFilters) {
-	      data = features.filter(data, graph);
+	  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 {
-	      context.features().resetStats();
-	    }
+	      if (primaryValue !== '') {
+	        primaryValue = context.cleanTagValue(primaryValue + '\'');
+	      }
 
-	    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());
+	      if (secondaryValue !== '') {
+	        secondaryValue = context.cleanTagValue(secondaryValue + '"');
+	      }
+
+	      tag[field.key] = primaryValue + secondaryValue;
 	    }
 
-	    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
-	    });
+	    dispatch.call('change', this, tag);
 	  }
 
-	  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);
-	  };
+	  roadheight.tags = function (tags) {
+	    _tags = tags;
+	    var primaryValue = tags[field.key];
+	    var secondaryValue;
+	    var isMixed = Array.isArray(primaryValue);
 
-	  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 (!isMixed) {
+	      if (primaryValue && (primaryValue.indexOf('\'') >= 0 || primaryValue.indexOf('"') >= 0)) {
+	        secondaryValue = primaryValue.match(/(-?[\d.]+)"/);
 
-	    if (mode && !allowed[mode.id]) {
-	      context.enter(modeBrowse(context));
+	        if (secondaryValue !== null) {
+	          secondaryValue = secondaryValue[1];
+	        }
+
+	        primaryValue = primaryValue.match(/(-?[\d.]+)'/);
+
+	        if (primaryValue !== null) {
+	          primaryValue = primaryValue[1];
+	        }
+
+	        _isImperial = true;
+	      } else if (primaryValue) {
+	        _isImperial = false;
+	      }
 	    }
 
-	    dispatch$1.call('drawn', this, {
-	      full: true
-	    });
-	  }
+	    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);
+	  };
 
-	  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
+	  roadheight.focus = function () {
+	    primaryInput.node().focus();
+	  };
 
-	    e2._rotation = e.rotation; // preserve the original rotation
+	  roadheight.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	    _selection.node().dispatchEvent(e2);
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
 
-	  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.
+	  return utilRebind(roadheight, dispatch, 'on');
+	}
 
-	    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
+	function uiFieldRoadspeed(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var unitInput = select(null);
+	  var input = select(null);
+	  var _entityIDs = [];
 
-	      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
+	  var _tags;
 
-	        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
+	  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];
 
-	      if (x2 !== x || y2 !== y || k2 !== k) {
-	        x = x2;
-	        y = y2;
-	        k = k2;
-	        eventTransform = identity$2.translate(x2, y2).scale(k2);
+	  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').attr('aria-label', _t('inspector.speed_unit')).call(unitCombo).merge(unitInput);
+	    unitInput.on('blur', changeUnits).on('change', changeUnits);
 
-	        if (_zoomerPanner._transform) {
-	          // utilZoomPan interface
-	          _zoomerPanner._transform(eventTransform);
-	        } else {
-	          // d3_zoom interface
-	          _selection.node().__zoom = eventTransform;
-	        }
-	      }
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(unitInput) === 'mph';
+	      utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	      setUnitSuggestions();
+	      change();
 	    }
+	  }
 
-	    if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
-	      return; // no change
-	    }
+	  function setUnitSuggestions() {
+	    speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+	    utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	  }
 
-	    var withinEditableZoom = map.withinEditableZoom();
+	  function comboValues(d) {
+	    return {
+	      value: d.toString(),
+	      title: d.toString()
+	    };
+	  }
 
-	    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);
-	      }
+	  function change() {
+	    var tag = {};
+	    var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
 
-	      _lastWithinEditableZoom = withinEditableZoom;
-	    }
+	    if (!value && Array.isArray(_tags[field.key])) return;
 
-	    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;
+	    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');
 	    }
 
-	    projection.transform(eventTransform);
-	    var scale = k / _transformStart.k;
-	    var tX = (x / scale - _transformStart.x) * scale;
-	    var tY = (y / scale - _transformStart.y) * scale;
+	    dispatch.call('change', this, tag);
+	  }
 
-	    if (context.inIntro()) {
-	      curtainProjection.transform({
-	        x: x - tX,
-	        y: y - tY,
-	        k: k
-	      });
-	    }
+	  roadspeed.tags = function (tags) {
+	    _tags = tags;
+	    var value = tags[field.key];
+	    var isMixed = Array.isArray(value);
 
-	    if (source) {
-	      _lastPointerEvent = event;
+	    if (!isMixed) {
+	      if (value && value.indexOf('mph') >= 0) {
+	        value = parseInt(value, 10).toString();
+	        _isImperial = true;
+	      } else if (value) {
+	        _isImperial = false;
+	      }
 	    }
 
-	    _isTransformed = true;
-	    _transformLast = eventTransform;
-	    utilSetTransform(supersurface, tX, tY, scale);
-	    scheduleRedraw();
-	    dispatch$1.call('move', this, map);
+	    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);
+	  };
 
-	    function isInteger(val) {
-	      return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-	    }
+	  roadspeed.focus = function () {
+	    input.node().focus();
+	  };
+
+	  roadspeed.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
+
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
 
-	  function resetTransform() {
-	    if (!_isTransformed) return false;
-	    utilSetTransform(supersurface, 0, 0);
-	    _isTransformed = false;
+	  return utilRebind(roadspeed, dispatch, 'on');
+	}
 
-	    if (context.inIntro()) {
-	      curtainProjection.transform(projection.transform());
-	    }
+	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
 
-	    return true;
+	  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 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.
+	  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);
+	  }
 
-	    if (resetTransform()) {
-	      difference = extent = undefined;
+	  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);
+	      }
+
+	      typeField.tags(tags);
+	    } else {
+	      typeField = null;
+	    }
+
+	    var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+	      return d.id;
+	    }); // Exit
+
+	    typeItem.exit().remove(); // Enter
+
+	    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).call(_t.append('inspector.radio.structure.type'));
+	    typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update
+
+	    typeItem = typeItem.merge(typeEnter);
+
+	    if (typeField) {
+	      typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+	    } // 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';
+	      });
 	    }
 
-	    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 layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-	    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));
+	    layerItem.exit().remove(); // Enter
 
-	    if (!difference) {
-	      supersurface.call(context.background());
-	      wrapper.call(drawLayers);
-	    } // OSM
+	    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').call(_t.append('inspector.radio.structure.layer'));
+	    layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update
 
+	    layerItem = layerItem.merge(layerEnter);
 
-	    if (map.editableDataEnabled() || map.isInWideSelection()) {
-	      context.loadTiles(projection);
-	      drawEditable(difference, extent);
-	    } else {
-	      editOff();
+	    if (layerField) {
+	      layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
 	    }
-
-	    _transformStart = projection.transform();
-	    return map;
 	  }
 
-	  var immediateRedraw = function immediateRedraw(difference, extent) {
-	    if (!difference && !extent) cancelPendingRedraw();
-	    redraw(difference, extent);
-	  };
+	  function changeType(t, onInput) {
+	    var key = selectedKey();
+	    if (!key) return;
+	    var val = t[key];
 
-	  map.lastPointerEvent = function () {
-	    return _lastPointerEvent;
-	  };
+	    if (val !== 'no') {
+	      _oldType[key] = val;
+	    }
 
-	  map.mouse = function (d3_event) {
-	    var event = _lastPointerEvent || d3_event;
+	    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 (event) {
-	      var s;
 
-	      while (s = event.sourceEvent) {
-	        event = s;
+	      if (t.layer === undefined) {
+	        if (key === 'bridge' && val !== 'no') {
+	          t.layer = '1';
+	        }
+
+	        if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+	          t.layer = '-1';
+	        }
 	      }
+	    }
 
-	      return _getMouseCoords(event);
+	    dispatch.call('change', this, t, onInput);
+	  }
+
+	  function changeLayer(t, onInput) {
+	    if (t.layer === '0') {
+	      t.layer = undefined;
 	    }
 
-	    return null;
-	  }; // returns Lng/Lat
+	    dispatch.call('change', this, t, onInput);
+	  }
 
+	  function changeRadio() {
+	    var t = {};
+	    var activeKey;
 
-	  map.mouseCoordinates = function () {
-	    var coord = map.mouse() || pxCenter();
-	    return projection.invert(coord);
-	  };
+	    if (field.key) {
+	      t[field.key] = undefined;
+	    }
 
-	  map.dblclickZoomEnable = function (val) {
-	    if (!arguments.length) return _dblClickZoomEnabled;
-	    _dblClickZoomEnabled = val;
-	    return map;
-	  };
+	    radios.each(function (d) {
+	      var active = select(this).property('checked');
+	      if (active) activeKey = d;
 
-	  map.redrawEnable = function (val) {
-	    if (!arguments.length) return _redrawEnabled;
-	    _redrawEnabled = val;
-	    return map;
-	  };
+	      if (field.key) {
+	        if (active) t[field.key] = d;
+	      } else {
+	        var val = _oldType[activeKey] || 'yes';
+	        t[d] = active ? val : undefined;
+	      }
+	    });
 
-	  map.isTransformed = function () {
-	    return _isTransformed;
-	  };
+	    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;
+	      }
+	    }
 
-	  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;
+	    dispatch.call('change', this, t);
+	  }
 
-	    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;
+	  radio.tags = function (tags) {
+	    function isOptionChecked(d) {
+	      if (field.key) {
+	        return tags[field.key] === d;
+	      }
 
-	      _selection.call(_zoomerPanner.transform, _transformStart);
+	      return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
 	    }
 
-	    return true;
-	  }
+	    function isMixed(d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+	      }
 
-	  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
+	      return Array.isArray(tags[d]);
+	    }
 
-	    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);
-	  }
+	    radios.property('checked', function (d) {
+	      return isOptionChecked(d) && (field.key || field.options.filter(isOptionChecked).length === 1);
+	    });
+	    labels.classed('active', function (d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+	      }
 
-	  map.pan = function (delta, duration) {
-	    var t = projection.translate();
-	    var k = projection.scale();
-	    t[0] += delta[0];
-	    t[1] += delta[1];
+	      return Array.isArray(tags[d]) && tags[d].some(function (v) {
+	        return typeof v === 'string' && v.toLowerCase() !== 'no';
+	      }) || !!(typeof tags[d] === 'string' && 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;
+	    });
 
-	    if (duration) {
-	      _selection.transition().duration(duration).on('start', function () {
-	        map.startEase();
-	      }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+	    if (selection.empty()) {
+	      placeholder.call(_t.append('inspector.none'));
 	    } else {
-	      projection.translate(t);
-	      _transformStart = projection.transform();
+	      placeholder.text(selection.attr('value'));
+	      _oldType[selection.datum()] = tags[selection.datum()];
+	    }
 
-	      _selection.call(_zoomerPanner.transform, _transformStart);
+	    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';
+	      }
 
-	      dispatch$1.call('move', this, map);
-	      immediateRedraw();
+	      wrap.call(structureExtras, tags);
 	    }
-
-	    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;
+	  radio.focus = function () {
+	    radios.node().focus();
 	  };
 
-	  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);
+	  radio.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _oldType = {};
+	    return radio;
 	  };
 
-	  map.zoomInFurther = function () {
-	    zoomIn(4);
+	  radio.isAllowed = function () {
+	    return _entityIDs.length === 1;
 	  };
 
-	  map.canZoomIn = function () {
-	    return map.zoom() < maxZoom;
-	  };
+	  return utilRebind(radio, dispatch, 'on');
+	}
 
-	  map.zoomOut = function () {
-	    zoomOut(1);
-	  };
+	function uiFieldRestrictions(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var breathe = behaviorBreathe();
+	  corePreferences('turn-restriction-via-way', null); // remove old key
 
-	  map.zoomOutFurther = function () {
-	    zoomOut(4);
-	  };
+	  var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-	  map.canZoomOut = function () {
-	    return map.zoom() > minZoom;
-	  };
+	  var storedDistance = corePreferences('turn-restriction-distance');
 
-	  map.center = function (loc2) {
-	    if (!arguments.length) {
-	      return projection.invert(pxCenter());
-	    }
+	  var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-	    if (setCenterZoom(loc2, map.zoom())) {
-	      dispatch$1.call('move', this, map);
-	    }
+	  var _maxDistance = storedDistance ? +storedDistance : 30;
 
-	    scheduleRedraw();
-	    return map;
-	  };
+	  var _initialized = false;
 
-	  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
+	  var _parent = select(null); // the entire field
 
-	    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');
+	  var _container = select(null); // just the map
 
-	    if (!openPane.empty()) {
-	      return [openPane.node().offsetWidth / 2, 0];
-	    }
 
-	    return [0, 0];
-	  };
+	  var _oldTurns;
 
-	  map.zoom = function (z2) {
-	    if (!arguments.length) {
-	      return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-	    }
+	  var _graph;
 
-	    if (z2 < _minzoom) {
-	      surface.interrupt();
-	      dispatch$1.call('hitMinZoom', this, map);
-	      z2 = context.minEditableZoom();
-	    }
+	  var _vertexID;
 
-	    if (setCenterZoom(map.center(), z2)) {
-	      dispatch$1.call('move', this, map);
-	    }
+	  var _intersection;
 
-	    scheduleRedraw();
-	    return map;
-	  };
+	  var _fromWayID;
 
-	  map.centerZoom = function (loc2, z2) {
-	    if (setCenterZoom(loc2, z2)) {
-	      dispatch$1.call('move', this, map);
-	    }
+	  var _lastXPos;
 
-	    scheduleRedraw();
-	    return map;
-	  };
+	  function restrictions(selection) {
+	    _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-	  map.zoomTo = function (entity) {
-	    var extent = entity.extent(context.graph());
-	    if (!isFinite(extent.area())) return map;
-	    var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	    return map.centerZoom(extent.center(), z2);
-	  };
+	    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.
 
-	  map.centerEase = function (loc2, duration) {
-	    duration = duration || 250;
-	    setCenterZoom(loc2, map.zoom(), duration);
-	    return map;
-	  };
 
-	  map.zoomEase = function (z2, duration) {
-	    duration = duration || 250;
-	    setCenterZoom(map.center(), z2, duration, false);
-	    return map;
-	  };
+	    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
 
-	  map.centerZoomEase = function (loc2, z2, duration) {
-	    duration = duration || 250;
-	    setCenterZoom(loc2, z2, duration, false);
-	    return map;
-	  };
+	    select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
 
-	  map.transformEase = function (t2, duration) {
-	    duration = duration || 250;
-	    setTransform(t2, duration, false
-	    /* don't force */
-	    );
-	    return map;
-	  };
+	    if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+	      selection.call(restrictions.off);
+	      return;
+	    }
 
-	  map.zoomToEase = function (obj, duration) {
-	    var extent;
+	    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
 
-	    if (Array.isArray(obj)) {
-	      obj.forEach(function (entity) {
-	        var entityExtent = entity.extent(context.graph());
+	    var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+	    containerEnter.append('div').attr('class', 'restriction-help'); // update
 
-	        if (!extent) {
-	          extent = entityExtent;
-	        } else {
-	          extent = extent.extend(entityExtent);
-	        }
-	      });
-	    } else {
-	      extent = obj.extent(context.graph());
-	    }
+	    _container = containerEnter.merge(container).call(renderViewer);
+	    var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-	    if (!isFinite(extent.area())) return map;
-	    var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	    return map.centerZoomEase(extent.center(), z2, duration);
-	  };
+	    controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+	  }
 
-	  map.startEase = function () {
-	    utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
-	      map.cancelEase();
-	    });
-	    return map;
-	  };
+	  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').call(_t.append('restriction.controls.distance', {
+	      suffix: ':'
+	    }));
+	    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
 
-	  map.cancelEase = function () {
-	    _selection.interrupt();
+	    selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxDistance = +val;
+	      _intersection = null;
 
-	    return map;
-	  };
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	  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));
-	    }
-	  };
+	      corePreferences('turn-restriction-distance', _maxDistance);
 
-	  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));
-	    }
-	  };
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-distance-text').call(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').call(_t.append('restriction.controls.via', {
+	      suffix: ':'
+	    }));
+	    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
 
-	  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
+	    selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxViaWay = +val;
 
-	    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;
-	  }
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	  map.extentZoom = function (val) {
-	    return calcExtentZoom(geoExtent(val), _dimensions);
-	  };
+	      corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-	  map.trimmedExtentZoom = function (val) {
-	    var trimY = 120;
-	    var trimX = 40;
-	    var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-	    return calcExtentZoom(geoExtent(val), trimmed);
-	  };
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-via-way-text').call(displayMaxVia(_maxViaWay));
+	  }
 
-	  map.withinEditableZoom = function () {
-	    return map.zoom() >= context.minEditableZoom();
-	  };
+	  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);
 
-	  map.isInWideSelection = function () {
-	    return !map.withinEditableZoom() && context.selectedIDs().length;
-	  };
+	    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
 
-	  map.editableDataEnabled = function (skipZoomCheck) {
-	    var layer = context.layers().layer('osm');
-	    if (!layer || !layer.enabled()) return false;
-	    return skipZoomCheck || map.withinEditableZoom();
-	  };
+	    var extent = geoExtent();
 
-	  map.notesEditable = function () {
-	    var layer = context.layers().layer('notes');
-	    if (!layer || !layer.enabled()) return false;
-	    return map.withinEditableZoom();
-	  };
+	    for (var i = 0; i < _intersection.vertices.length; i++) {
+	      extent._extend(_intersection.vertices[i].extent());
+	    }
 
-	  map.minzoom = function (val) {
-	    if (!arguments.length) return _minzoom;
-	    _minzoom = val;
-	    return map;
-	  };
+	    var padTop = 35; // reserve top space for hint text
+	    // If this is a large intersection, adjust zoom to fit extent
 
-	  map.toggleHighlightEdited = function () {
-	    surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-	    map.pan([0, 0]); // trigger a redraw
+	    if (_intersection.vertices.length > 1) {
+	      var hPadding = Math.min(160, Math.max(110, d[0] * 0.4));
+	      var vPadding = 160;
+	      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] - hPadding);
+	      var vFactor = (br[1] - tl[1]) / (d[1] - vPadding - padTop);
+	      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));
+	    }
 
-	    dispatch$1.call('changeHighlighting', this);
-	  };
+	    var extentCenter = projection(extent.center());
+	    extentCenter[1] = extentCenter[1] - padTop / 2;
+	    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);
 
-	  map.areaFillOptions = ['wireframe', 'partial', 'full'];
+	    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.
 
-	  map.activeAreaFill = function (val) {
-	    if (!arguments.length) return corePreferences('area-fill') || 'partial';
-	    corePreferences('area-fill', val);
 
-	    if (val !== 'wireframe') {
-	      corePreferences('area-fill-toggle', val);
+	    if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+	      _fromWayID = null;
+	      _oldTurns = null;
 	    }
 
-	    updateAreaFill();
-	    map.pan([0, 0]); // trigger a redraw
+	    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;
 
-	    dispatch$1.call('changeAreaFill', this);
-	    return map;
-	  };
+	    if (_fromWayID) {
+	      way = vgraph.entity(_fromWayID);
+	      surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	    }
 
-	  map.toggleWireframe = function () {
-	    var activeFill = map.activeAreaFill();
+	    document.addEventListener('resizeWindow', function () {
+	      utilSetDimensions(_container, null);
+	      redraw(1);
+	    }, false);
+	    updateHints(null);
 
-	    if (activeFill === 'wireframe') {
-	      activeFill = corePreferences('area-fill-toggle') || 'partial';
-	    } else {
-	      activeFill = 'wireframe';
-	    }
+	    function click(d3_event) {
+	      surface.call(breathe.off).call(breathe);
+	      var datum = d3_event.target.__data__;
+	      var entity = datum && datum.properties && datum.properties.entity;
 
-	    map.activeAreaFill(activeFill);
-	  };
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	  function updateAreaFill() {
-	    var activeFill = map.activeAreaFill();
-	    map.areaFillOptions.forEach(function (opt) {
-	      surface.classed('fill-' + opt, Boolean(opt === activeFill));
-	    });
-	  }
+	      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);
 
-	  map.layers = function () {
-	    return drawLayers;
-	  };
+	        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
 
-	  map.doubleUpHandler = function () {
-	    return _doubleUpHandler;
-	  };
+	          datumOnly.only = true; // but change this property
 
-	  return utilRebind(map, dispatch$1, 'on');
-	}
+	          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.
 
-	function rendererPhotos(context) {
-	  var dispatch$1 = dispatch('change');
-	  var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-	  var _allPhotoTypes = ['flat', 'panoramic'];
+	          turns = _intersection.turns(_fromWayID, 2);
+	          extraActions = [];
+	          _oldTurns = [];
 
-	  var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
+	          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);
 
-	  var _dateFilters = ['fromDate', 'toDate'];
+	              _oldTurns.push(turn);
 
-	  var _fromDate;
+	              extraActions.push(actionUnrestrictTurn(turn));
+	            }
+	          }
 
-	  var _toDate;
+	          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 = [];
 
-	  var _usernames;
+	          for (i = 0; i < turns.length; i++) {
+	            if (turns[i].key !== datum.key) {
+	              extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
+	            }
+	          }
 
-	  function photos() {}
+	          _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')]);
+	        }
 
-	  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;
-	    });
+	        context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+	        // Refresh it and update the help..
 
-	    if (enabled.length) {
-	      hash.photo_overlay = enabled.join(',');
-	    } else {
-	      delete hash.photo_overlay;
+	        var s = surface.selectAll('.' + datum.key);
+	        datum = s.empty() ? null : s.datum();
+	        updateHints(datum);
+	      } else {
+	        _fromWayID = null;
+	        _oldTurns = null;
+	        redraw();
+	      }
 	    }
 
-	    window.location.replace('#' + utilQsString(hash, true));
-	  }
-
-	  photos.overlayLayerIDs = function () {
-	    return _layerIDs;
-	  };
+	    function mouseover(d3_event) {
+	      var datum = d3_event.target.__data__;
+	      updateHints(datum);
+	    }
 
-	  photos.allPhotoTypes = function () {
-	    return _allPhotoTypes;
-	  };
+	    _lastXPos = _lastXPos || sdims[0];
 
-	  photos.dateFilters = function () {
-	    return _dateFilters;
-	  };
+	    function redraw(minChange) {
+	      var xPos = -1;
 
-	  photos.dateFilterValue = function (val) {
-	    return val === _dateFilters[0] ? _fromDate : _toDate;
-	  };
+	      if (minChange) {
+	        xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+	      }
 
-	  photos.setDateFilter = function (type, val, updateUrl) {
-	    // validate the date
-	    var date = val && new Date(val);
+	      if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+	        if (context.hasEntity(_vertexID)) {
+	          _lastXPos = xPos;
 
-	    if (date && !isNaN(date)) {
-	      val = date.toISOString().substr(0, 10);
-	    } else {
-	      val = null;
+	          _container.call(renderViewer);
+	        }
+	      }
 	    }
 
-	    if (type === _dateFilters[0]) {
-	      _fromDate = val;
+	    function highlightPathsFrom(wayID) {
+	      surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+	      surface.selectAll('.' + wayID).classed('related', true);
 
-	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-	        _toDate = _fromDate;
-	      }
-	    }
+	      if (wayID) {
+	        var turns = _intersection.turns(wayID, _maxViaWay);
 
-	    if (type === _dateFilters[1]) {
-	      _toDate = val;
+	        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';
 
-	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-	        _fromDate = _toDate;
+	          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');
+	        }
 	      }
 	    }
 
-	    dispatch$1.call('change', this);
+	    function updateHints(datum) {
+	      var help = _container.selectAll('.restriction-help').html('');
 
-	    if (updateUrl) {
-	      var rangeString;
+	      var placeholders = {};
+	      ['from', 'via', 'to'].forEach(function (k) {
+	        placeholders[k] = {
+	          html: '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>'
+	        };
+	      });
+	      var entity = datum && datum.properties && datum.properties.entity;
 
-	      if (_fromDate || _toDate) {
-	        rangeString = (_fromDate || '') + '_' + (_toDate || '');
+	      if (entity) {
+	        datum = entity;
 	      }
 
-	      setUrlFilterValue('photo_dates', rangeString);
-	    }
-	  };
+	      if (_fromWayID) {
+	        way = vgraph.entity(_fromWayID);
+	        surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	      } // Hovering a way
 
-	  photos.setUsernameFilter = function (val, updateUrl) {
-	    if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-	    if (val) {
-	      val = val.map(function (d) {
-	        return d.trim();
-	      }).filter(Boolean);
+	      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 (!val.length) {
-	        val = null;
-	      }
-	    }
+	        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: ''
+	          });
+	        }
 
-	    _usernames = val;
-	    dispatch$1.call('change', this);
+	        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)
+	        }));
 
-	    if (updateUrl) {
-	      var hashString;
+	        if (datum.via.ways && datum.via.ways.length) {
+	          var names = [];
 
-	      if (_usernames) {
-	        hashString = _usernames.join(',');
-	      }
+	          for (var i = 0; i < datum.via.ways.length; i++) {
+	            var prev = names[names.length - 1];
+	            var curr = displayName(datum.via.ways[i], vgraph);
 
-	      setUrlFilterValue('photo_username', hashString);
-	    }
-	  };
+	            if (!prev || curr !== prev) {
+	              // collapse identical names
+	              names.push(curr);
+	            }
+	          }
 
-	  function setUrlFilterValue(property, val) {
-	    if (!window.mocha) {
-	      var hash = utilStringQs(window.location.hash);
+	          help.append('div') // "VIA {viaNames}"
+	          .html(_t.html('restriction.help.via_names', {
+	            via: placeholders.via,
+	            viaNames: names.join(', ')
+	          }));
+	        }
 
-	      if (val) {
-	        if (hash[property] === val) return;
-	        hash[property] = val;
+	        if (!indirect) {
+	          help.append('div') // Click for "No Right Turn"
+	          .html(_t.html('restriction.help.toggle', {
+	            turn: {
+	              html: nextText.trim()
+	            }
+	          }));
+	        }
+
+	        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 {
-	        if (!(property in hash)) return;
-	        delete hash[property];
-	      }
+	        highlightPathsFrom(null);
 
-	      window.location.replace('#' + utilQsString(hash, true));
+	        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 showsLayer(id) {
-	    var layer = context.layers().layer(id);
-	    return layer && layer.supported() && layer.enabled();
+	  function displayMaxDistance(maxDist) {
+	    return function (selection) {
+	      var isImperial = !_mainLocalizer.usesMetric();
+	      var opts;
+
+	      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
+	          })
+	        };
+	      }
+
+	      return selection.html('').call(_t.append('restriction.controls.distance_up_to', opts));
+	    };
 	  }
 
-	  photos.shouldFilterByDate = function () {
-	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
-	  };
+	  function displayMaxVia(maxVia) {
+	    return function (selection) {
+	      selection = selection.html('');
+	      return maxVia === 0 ? selection.call(_t.append('restriction.controls.via_node_only')) : maxVia === 1 ? selection.call(_t.append('restriction.controls.via_up_to_one')) : selection.call(_t.append('restriction.controls.via_up_to_two'));
+	    };
+	  }
 
-	  photos.shouldFilterByPhotoType = function () {
-	    return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
-	  };
+	  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;
+	  }
 
-	  photos.shouldFilterByUsername = function () {
-	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+	  restrictions.entityIDs = function (val) {
+	    _intersection = null;
+	    _fromWayID = null;
+	    _oldTurns = null;
+	    _vertexID = val[0];
 	  };
 
-	  photos.showsPhotoType = function (val) {
-	    if (!photos.shouldFilterByPhotoType()) return true;
-	    return _shownPhotoTypes.indexOf(val) !== -1;
-	  };
+	  restrictions.tags = function () {};
 
-	  photos.showsFlat = function () {
-	    return photos.showsPhotoType('flat');
-	  };
+	  restrictions.focus = function () {};
 
-	  photos.showsPanoramic = function () {
-	    return photos.showsPhotoType('panoramic');
+	  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);
 	  };
 
-	  photos.fromDate = function () {
-	    return _fromDate;
-	  };
+	  return utilRebind(restrictions, dispatch, 'on');
+	}
+	uiFieldRestrictions.supportsMultiselection = false;
 
-	  photos.toDate = function () {
-	    return _toDate;
-	  };
+	function uiFieldTextarea(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var input = select(null);
 
-	  photos.togglePhotoType = function (val) {
-	    var index = _shownPhotoTypes.indexOf(val);
+	  var _tags;
 
-	    if (index !== -1) {
-	      _shownPhotoTypes.splice(index, 1);
-	    } else {
-	      _shownPhotoTypes.push(val);
-	    }
+	  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);
+	  }
 
-	    dispatch$1.call('change', this);
-	    return photos;
+	  function change(onInput) {
+	    return function () {
+	      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;
+	      var t = {};
+	      t[field.key] = val || undefined;
+	      dispatch.call('change', this, t, onInput);
+	    };
+	  }
+
+	  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);
 	  };
 
-	  photos.usernames = function () {
-	    return _usernames;
+	  textarea.focus = function () {
+	    input.node().focus();
 	  };
 
-	  photos.init = function () {
-	    var hash = utilStringQs(window.location.hash);
+	  return utilRebind(textarea, dispatch, 'on');
+	}
 
-	    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);
-	    }
+	function uiFieldWikidata(field, context) {
+	  var wikidata = services.wikidata;
+	  var dispatch = dispatch$8('change');
 
-	    if (hash.photo_username) {
-	      this.setUsernameFilter(hash.photo_username, false);
-	    }
+	  var _selection = select(null);
 
-	    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 _searchInput = select(null);
 
-	    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);
+	  var _qid = null;
+	  var _wikidataEntity = null;
+	  var _wikiURL = '';
+	  var _entityIDs = [];
 
-	      if (results && results.length >= 3) {
-	        var serviceId = results[1];
-	        var photoKey = results[2];
-	        var service = services[serviceId];
+	  var _wikipediaKey = field.keys && field.keys.find(function (key) {
+	    return key.includes('wikipedia');
+	  }),
+	      _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+
+	  var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
+
+	  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
+
+	    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');
+	    });
+	  }
 
-	        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;
-	            }
+	  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]);
 
-	            if (!service.cachedImage(photoKey)) return;
-	            service.on('loadedImages.rendererPhotos', null);
-	            service.ensureViewerLoaded(context).then(function () {
-	              service.selectImage(context, photoKey).showViewer(context);
-	            });
-	          });
+	        if (entity.tags[_hintKey]) {
+	          q = entity.tags[_hintKey];
+	          break;
 	        }
 	      }
 	    }
 
-	    context.layers().on('change.rendererPhotos', updateStorage);
-	  };
-
-	  return utilRebind(photos, dispatch$1, 'on');
-	}
-
-	function uiAccount(context) {
-	  var osm = context.connection();
+	    wikidata.itemsForSearchQuery(q, function (err, data) {
+	      if (err) return;
 
-	  function update(selection) {
-	    if (!osm) return;
+	      for (var i in data) {
+	        data[i].value = data[i].label + ' (' + data[i].id + ')';
+	        data[i].title = data[i].description;
+	      }
 
-	    if (!osm.authenticated()) {
-	      selection.selectAll('.userLink, .logoutLink').classed('hide', true);
-	      return;
-	    }
+	      if (callback) callback(data);
+	    });
+	  }
 
-	    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
+	  function change() {
+	    var syncTags = {};
+	    syncTags[field.key] = _qid;
+	    dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-	      var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
+	    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.
 
-	      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
+	      if (context.graph() !== initGraph) return;
+	      if (!entity.sitelinks) return;
+	      var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
 
+	      ['labels', 'descriptions'].forEach(function (key) {
+	        if (!entity[key]) return;
+	        var valueLangs = Object.keys(entity[key]);
+	        if (valueLangs.length === 0) return;
+	        var valueLang = valueLangs[0];
 
-	      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();
+	        if (langs.indexOf(valueLang) === -1) {
+	          langs.push(valueLang);
+	        }
 	      });
-	    });
-	  }
+	      var newWikipediaValue;
 
-	  return function (selection) {
-	    selection.append('li').attr('class', 'userLink').classed('hide', true);
-	    selection.append('li').attr('class', 'logoutLink').classed('hide', true);
+	      if (_wikipediaKey) {
+	        var foundPreferred;
 
-	    if (osm) {
-	      osm.on('change.account', function () {
-	        update(selection);
-	      });
-	      update(selection);
-	    }
-	  };
-	}
+	        for (var i in langs) {
+	          var lang = langs[i];
+	          var siteID = lang.replace('-', '_') + 'wiki';
 
-	function uiAttribution(context) {
-	  var _selection = select(null);
+	          if (entity.sitelinks[siteID]) {
+	            foundPreferred = true;
+	            newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-	  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]);
+	            break;
+	          }
+	        }
 
-	      if (d.terms_html) {
-	        attribution.html(d.terms_html);
-	        return;
-	      }
+	        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 (d.terms_url) {
-	        attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+	          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;
+	          }
+	        }
 	      }
 
-	      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()
-	      });
-
-	      if (d.icon && !d.overlay) {
-	        attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+	      if (newWikipediaValue) {
+	        newWikipediaValue = context.cleanTagValue(newWikipediaValue);
 	      }
 
-	      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);
-	  }
-
-	  function update() {
-	    var baselayer = context.background().baseLayerSource();
+	      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
 
-	    _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
+	        if (newWikipediaValue === null) {
+	          if (!currTags[_wikipediaKey]) return null;
+	          delete currTags[_wikipediaKey];
+	        } else {
+	          currTags[_wikipediaKey] = newWikipediaValue;
+	        }
 
-	    var z = context.map().zoom();
-	    var overlays = context.background().overlayLayerSources() || [];
+	        return actionChangeTags(entityID, currTags);
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	    _selection.call(render, overlays.filter(function (s) {
-	      return s.validZoom(z);
-	    }), 'overlay-layer-attribution');
+	      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
+	    });
 	  }
 
-	  return function (selection) {
-	    _selection = selection;
-	    context.background().on('change.attribution', update);
-	    context.map().on('move.attribution', throttle(update, 400, {
-	      leading: false
-	    }));
-	    update();
-	  };
-	}
-
-	function uiContributors(context) {
-	  var osm = context.connection(),
-	      debouncedUpdate = debounce(function () {
-	    update();
-	  }, 1000),
-	      limit = 4,
-	      hidden = false,
-	      wrap = select(null);
+	  function setLabelForEntity() {
+	    var label = '';
 
-	  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 (_wikidataEntity) {
+	      label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-	    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()
-	      }));
+	      if (label.length === 0) {
+	        label = _wikidataEntity.id.toString();
+	      }
 	    }
 
-	    if (!u.length) {
-	      hidden = true;
-	      wrap.transition().style('opacity', 0);
-	    } else if (hidden) {
-	      wrap.transition().style('opacity', 1);
-	    }
+	    utilGetSetValue(_searchInput, label);
 	  }
 
-	  return function (selection) {
-	    if (!osm) return;
-	    wrap = selection;
-	    update();
-	    osm.on('loaded.contributors', debouncedUpdate);
-	    context.map().on('move.contributors', debouncedUpdate);
-	  };
-	}
-
-	var _popoverID = 0;
-	function uiPopover(klass) {
-	  var _id = _popoverID++;
-
-	  var _anchorSelection = select(null);
-
-	  var popover = function popover(selection) {
-	    _anchorSelection = selection;
-	    selection.each(setup);
-	  };
-
-	  var _animation = utilFunctor(false);
-
-	  var _placement = utilFunctor('top'); // top, bottom, left, right
-
+	  wiki.tags = function (tags) {
+	    var isMixed = Array.isArray(tags[field.key]);
 
-	  var _alignment = utilFunctor('center'); // leading, center, trailing
+	    _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
+	    _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-	  var _scrollContainer = utilFunctor(select(null));
+	    if (!/^Q[0-9]*$/.test(_qid)) {
+	      // not a proper QID
+	      unrecognized();
+	      return;
+	    } // QID value in correct format
 
-	  var _content;
 
-	  var _displayType = utilFunctor('');
+	    _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) {
+	        unrecognized();
+	        return;
+	      }
 
-	  var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
+	      _wikidataEntity = entity;
+	      setLabelForEntity();
+	      var description = entityPropertyForDisplay(entity, 'descriptions');
 
+	      _selection.select('button.wiki-link').classed('disabled', false);
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      _selection.select('.preset-wikidata-description').style('display', function () {
+	        return description.length > 0 ? 'flex' : 'none';
+	      }).select('input').attr('value', description);
 
-	  popover.displayType = function (val) {
-	    if (arguments.length) {
-	      _displayType = utilFunctor(val);
-	      return popover;
-	    } else {
-	      return _displayType;
-	    }
-	  };
+	      _selection.select('.preset-wikidata-identifier').style('display', function () {
+	        return entity.id ? 'flex' : 'none';
+	      }).select('input').attr('value', entity.id);
+	    }); // not a proper QID
 
-	  popover.hasArrow = function (val) {
-	    if (arguments.length) {
-	      _hasArrow = utilFunctor(val);
-	      return popover;
-	    } else {
-	      return _hasArrow;
-	    }
-	  };
+	    function unrecognized() {
+	      _wikidataEntity = null;
+	      setLabelForEntity();
 
-	  popover.placement = function (val) {
-	    if (arguments.length) {
-	      _placement = utilFunctor(val);
-	      return popover;
-	    } else {
-	      return _placement;
-	    }
-	  };
+	      _selection.select('.preset-wikidata-description').style('display', 'none');
 
-	  popover.alignment = function (val) {
-	    if (arguments.length) {
-	      _alignment = utilFunctor(val);
-	      return popover;
-	    } else {
-	      return _alignment;
-	    }
-	  };
+	      _selection.select('.preset-wikidata-identifier').style('display', 'none');
 
-	  popover.scrollContainer = function (val) {
-	    if (arguments.length) {
-	      _scrollContainer = utilFunctor(val);
-	      return popover;
-	    } else {
-	      return _scrollContainer;
-	    }
-	  };
+	      _selection.select('button.wiki-link').classed('disabled', true);
 
-	  popover.content = function (val) {
-	    if (arguments.length) {
-	      _content = val;
-	      return popover;
-	    } else {
-	      return _content;
+	      if (_qid && _qid !== '') {
+	        _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+	      } else {
+	        _wikiURL = '';
+	      }
 	    }
 	  };
 
-	  popover.isShown = function () {
-	    var popoverSelection = _anchorSelection.select('.popover-' + _id);
-
-	    return !popoverSelection.empty() && popoverSelection.classed('in');
-	  };
+	  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
 
-	  popover.show = function () {
-	    _anchorSelection.each(show);
-	  };
+	    var langs = wikidata.languagesToQuery();
 
-	  popover.updateContent = function () {
-	    _anchorSelection.each(updateContent);
-	  };
+	    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
 
-	  popover.hide = function () {
-	    _anchorSelection.each(hide);
-	  };
 
-	  popover.toggle = function () {
-	    _anchorSelection.each(toggle);
-	  };
+	    return propObj[langKeys[0]].value;
+	  }
 
-	  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();
+	  wiki.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
 	  };
 
-	  popover.destroyAny = function (selection) {
-	    selection.call(popover.destroy, '.popover');
+	  wiki.focus = function () {
+	    _searchInput.node().focus();
 	  };
 
-	  function setup() {
-	    var anchor = select(this);
+	  return utilRebind(wiki, dispatch, 'on');
+	}
 
-	    var animate = _animation.apply(this, arguments);
+	function uiFieldWikipedia(field, context) {
+	  var _arguments = arguments;
+	  var dispatch = dispatch$8('change');
+	  var wikipedia = services.wikipedia;
+	  var wikidata = services.wikidata;
 
-	    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);
+	  var _langInput = select(null);
 
-	    if (animate) {
-	      popoverSelection.classed('fade', true);
-	    }
+	  var _titleInput = select(null);
 
-	    var display = _displayType.apply(this, arguments);
+	  var _wikiURL = '';
 
-	    if (display === 'hover') {
-	      var _lastNonMouseEnterTime;
+	  var _entityIDs;
 
-	      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
+	  var _tags;
 
-	            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
+	  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 = '';
 
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
 
-	        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);
-	        });
-	      });
+	        if (entity.tags.name) {
+	          value = entity.tags.name;
+	          break;
+	        }
+	      }
 	    }
-	  }
-
-	  function show() {
-	    var anchor = select(this);
-	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	    if (popoverSelection.empty()) {
-	      // popover was removed somehow, put it back
-	      anchor.call(popover.destroy);
-	      anchor.each(setup);
-	      popoverSelection = anchor.selectAll('.popover-' + _id);
-	    }
+	    var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+	    searchfn(language()[2], value, function (query, data) {
+	      callback(data.map(function (d) {
+	        return {
+	          value: d
+	        };
+	      }));
+	    });
+	  });
 
-	    popoverSelection.classed('in', true);
+	  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);
 
-	    var displayType = _displayType.apply(this, arguments);
+	    _langInput.on('blur', changeLang).on('change', changeLang);
 
-	    if (displayType === 'clickFocus') {
-	      anchor.classed('active', true);
-	      popoverSelection.node().focus();
-	    }
+	    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);
 
-	    anchor.each(updateContent);
+	    _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');
+	    });
 	  }
 
-	  function updateContent() {
-	    var anchor = select(this);
+	  function defaultLanguageInfo(skipEnglishFallback) {
+	    var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-	    if (_content) {
-	      anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
-	    }
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-	    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
+	      if (d[2] === langCode) return d;
+	    } // fallback to English
 
-	    updatePosition.apply(this, arguments);
-	    updatePosition.apply(this, arguments);
+
+	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
 	  }
 
-	  function updatePosition() {
-	    var anchor = select(this);
-	    var popoverSelection = anchor.selectAll('.popover-' + _id);
+	  function language(skipEnglishFallback) {
+	    var value = utilGetSetValue(_langInput).toLowerCase();
 
-	    var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
-	    var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-	    var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-	    var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+	      if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+	    } // fallback to English
 
-	    var placement = _placement.apply(this, arguments);
 
-	    popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
+	    return defaultLanguageInfo(skipEnglishFallback);
+	  }
 
-	    var alignment = _alignment.apply(this, arguments);
+	  function changeLang() {
+	    utilGetSetValue(_langInput, language()[1]);
+	    change(true);
+	  }
 
-	    var alignFactor = 0.5;
+	  function change(skipWikidata) {
+	    var value = utilGetSetValue(_titleInput);
+	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
-	    if (alignment === 'leading') {
-	      alignFactor = 0;
-	    } else if (alignment === 'trailing') {
-	      alignFactor = 1;
-	    }
+	    var langInfo = m && _dataWikipedia.find(function (d) {
+	      return m[1] === d[2];
+	    });
 
-	    var anchorFrame = getFrame(anchor.node());
-	    var popoverFrame = getFrame(popoverSelection.node());
-	    var position;
+	    var syncTags = {};
 
-	    switch (placement) {
-	      case 'top':
-	        position = {
-	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	          y: anchorFrame.y - popoverFrame.h
-	        };
-	        break;
+	    if (langInfo) {
+	      var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-	      case 'bottom':
-	        position = {
-	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	          y: anchorFrame.y + anchorFrame.h
-	        };
-	        break;
+	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-	      case 'left':
-	        position = {
-	          x: anchorFrame.x - popoverFrame.w,
-	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	        };
-	        break;
+	      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) {
 
-	      case 'right':
-	        position = {
-	          x: anchorFrame.x + anchorFrame.w,
-	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	        };
-	        break;
+	        anchor = decodeURIComponent(m[3]); // }
+
+	        value += '#' + anchor.replace(/_/g, ' ');
+	      }
+
+	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, value);
 	    }
 
-	    if (position) {
-	      if (scrollNode && (placement === 'top' || placement === 'bottom')) {
-	        var initialPosX = position.x;
+	    if (value) {
+	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+	    } else {
+	      syncTags.wikipedia = undefined;
+	    }
 
-	        if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-	          position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-	        } else if (position.x < 10) {
-	          position.x = 10;
-	        }
+	    dispatch.call('change', this, syncTags);
+	    if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-	        var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
+	    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.
 
-	        var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-	        arrow.style('left', ~~arrowPosX + 'px');
-	      }
+	      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
 
-	      popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-	    } else {
-	      popoverSelection.style('left', null).style('top', null);
-	    }
+	        if (currTags.wikidata !== value) {
+	          currTags.wikidata = value;
+	          return actionChangeTags(entityID, currTags);
+	        }
 
-	    function getFrame(node) {
-	      var positionStyle = select(node).style('position');
+	        return null;
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	      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
-	        };
-	      }
-	    }
+	      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
+	    });
 	  }
 
-	  function hide() {
-	    var anchor = select(this);
+	  wiki.tags = function (tags) {
+	    _tags = tags;
+	    updateForTags(tags);
+	  };
 
-	    if (_displayType.apply(this, arguments) === 'clickFocus') {
-	      anchor.classed('active', false);
-	    }
+	  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`
 
-	    anchor.selectAll('.popover-' + _id).classed('in', false);
-	  }
+	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+	    var tagLang = m && m[1];
+	    var tagArticleTitle = m && m[2];
+	    var anchor = m && m[3];
 
-	  function toggle() {
-	    if (select(this).select('.popover-' + _id).classed('in')) {
-	      hide.apply(this, arguments);
-	    } else {
-	      show.apply(this, arguments);
-	    }
-	  }
+	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+	      return tagLang === d[2];
+	    }); // value in correct format
 
-	  return popover;
-	}
 
-	function uiTooltip(klass) {
-	  var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
+	    if (tagLangInfo) {
+	      var nativeLangName = tagLangInfo[1];
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
-	  var _title = function _title() {
-	    var title = this.getAttribute('data-original-title');
+	      if (anchor) {
+	        try {
+	          // Best-effort `anchorencode:` implementation
+	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+	        } catch (e) {
+	          anchor = anchor.replace(/ /g, '_');
+	        }
+	      }
 
-	    if (title) {
-	      return title;
+	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
 	    } else {
-	      title = this.getAttribute('title');
-	      this.removeAttribute('title');
-	      this.setAttribute('data-original-title', title);
+	      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 = '';
+	      }
 	    }
+	  }
 
-	    return title;
+	  wiki.entityIDs = function (val) {
+	    if (!_arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
 	  };
 
-	  var _heading = utilFunctor(null);
+	  wiki.focus = function () {
+	    _titleInput.node().focus();
+	  };
 
-	  var _keys = utilFunctor(null);
+	  return utilRebind(wiki, dispatch, 'on');
+	}
+	uiFieldWikipedia.supportsMultiselection = false;
 
-	  tooltip.title = function (val) {
-	    if (!arguments.length) return _title;
-	    _title = utilFunctor(val);
-	    return tooltip;
-	  };
+	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
+	};
 
-	  tooltip.heading = function (val) {
-	    if (!arguments.length) return _heading;
-	    _heading = utilFunctor(val);
-	    return tooltip;
-	  };
+	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
 
-	  tooltip.keys = function (val) {
-	    if (!arguments.length) return _keys;
-	    _keys = utilFunctor(val);
-	    return tooltip;
-	  };
+	  field.domId = utilUniqueDomId('form-field-' + field.safeid);
+	  var _show = options.show;
+	  var _state = '';
+	  var _tags = {};
 
-	  tooltip.content(function () {
-	    var heading = _heading.apply(this, arguments);
+	  var _entityExtent;
 
-	    var text = _title.apply(this, arguments);
+	  if (entityIDs && entityIDs.length) {
+	    _entityExtent = entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
+	  }
 
-	    var keys = _keys.apply(this, arguments);
+	  var _locked = false;
 
-	    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;
-	}
+	  var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+	    label: field.label
+	  })).placement('bottom');
 
-	function uiEditMenu(context) {
-	  var dispatch$1 = dispatch('toggled');
+	  field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-	  var _menu = select(null);
+	  if (_show && !field.impl) {
+	    createField();
+	  } // Creates the field.. This is done lazily,
+	  // once we know that the field will be shown.
 
-	  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
+	  function createField() {
+	    field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+	      dispatch.call('change', field, t, onInput);
+	    });
 
-	  var _triggerType = '';
-	  var _vpTopMargin = 85; // viewport top margin
+	    if (entityIDs) {
+	      field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
-	  var _vpBottomMargin = 45; // viewport bottom margin
+	      if (field.impl.entityIDs) {
+	        field.impl.entityIDs(entityIDs);
+	      }
+	    }
+	  }
 
-	  var _vpSideMargin = 35; // viewport side margin
+	  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 _menuTop = false;
+	  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 _menuHeight;
+	        return false;
+	      }
 
-	  var _menuWidth; // hardcode these values to make menu positioning easier
+	      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 _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
+	  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);
+	  }
 
-	  var _tooltipWidth = 210; // offset the menu slightly from the target location
+	  field.render = function (selection) {
+	    var container = selection.selectAll('.form-field').data([field]); // Enter
 
-	  var _menuSideMargin = 10;
-	  var _tooltips = [];
+	    var enter = container.enter().append('div').attr('class', function (d) {
+	      return 'form-field form-field-' + d.safeid;
+	    }).classed('nowrap', !options.wrap);
 
-	  var editMenu = function editMenu(selection) {
-	    var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+	    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');
 
-	    var ops = _operations.filter(function (op) {
-	      return !isTouchMenu || !op.mouseOnly;
-	    });
+	      if (options.remove) {
+	        labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+	      }
 
-	    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
+	      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
 
-	    _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-	    var showLabels = isTouchMenu;
-	    var buttonHeight = showLabels ? 32 : 34;
+	    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);
 
-	    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;
-	    }
+	      if (!d.impl) {
+	        createField();
+	      }
 
-	    _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
-	    _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
+	      var reference, help; // instantiate field help
 
-	    var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
+	      if (options.wrap && field.type === 'restrictions') {
+	        help = uiFieldHelp(context, 'restrictions');
+	      } // instantiate tag reference
 
 
-	    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 (options.wrap && options.info) {
+	        var referenceKey = d.key || '';
 
-	      _tooltips.push(tooltip);
+	        if (d.type === 'multiCombo') {
+	          // lookup key without the trailing ':'
+	          referenceKey = referenceKey.replace(/:$/, '');
+	        }
+
+	        reference = uiTagReference(d.reference || {
+	          key: referenceKey
+	        });
+
+	        if (_state === 'hover') {
+	          reference.showing(false);
+	        }
+	      }
 
-	      select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
-	    });
+	      selection.call(d.impl); // add field help components
 
-	    if (showLabels) {
-	      buttonsEnter.append('span').attr('class', 'label').html(function (d) {
-	        return d.title;
-	      });
-	    } // update
+	      if (help) {
+	        selection.call(help.body).select('.field-label').call(help.button);
+	      } // add tag reference components
 
 
-	    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();
+	      if (reference) {
+	        selection.call(reference.body).select('.field-label').call(reference.button);
 	      }
-	    }).on('drawn.edit-menu', function (info) {
-	      if (info.full) updatePosition();
+
+	      d.impl.tags(_tags);
 	    });
-	    var lastPointerUpType; // `pointerup` is always called before `click`
+	    container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked
 
-	    function pointerup(d3_event) {
-	      lastPointerUpType = d3_event.pointerType;
-	    }
+	    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);
+	  };
 
-	    function click(d3_event, operation) {
-	      d3_event.stopPropagation();
+	  field.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return field;
+	  };
 
-	      if (operation.relatedEntityIds) {
-	        utilHighlightEntities(operation.relatedEntityIds(), false, context);
-	      }
+	  field.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
 
-	      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)();
-	        }
-	      } else {
-	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-	          context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
-	        }
+	    if (tagsContainFieldKey() && !_show) {
+	      // always show a field if it has a value to display
+	      _show = true;
 
-	        operation();
-	        editMenu.close();
+	      if (!field.impl) {
+	        createField();
 	      }
-
-	      lastPointerUpType = null;
 	    }
 
-	    dispatch$1.call('toggled', this, true);
+	    return field;
 	  };
 
-	  function updatePosition() {
-	    if (!_menu || _menu.empty()) return;
-	    var anchorLoc = context.projection(_anchorLocLonLat);
-	    var viewport = context.surfaceRect();
+	  field.locked = function (val) {
+	    if (!arguments.length) return _locked;
+	    _locked = val;
+	    return field;
+	  };
 
-	    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;
-	    }
+	  field.show = function () {
+	    _show = true;
 
-	    var menuLeft = displayOnLeft(viewport);
-	    var offset = [0, 0];
-	    offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+	    if (!field.impl) {
+	      createField();
+	    }
 
-	    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 (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
 
-	    var origin = geoVecAdd(anchorLoc, offset);
 
-	    _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
+	  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
 
-	    var tooltipSide = tooltipPosition(viewport, menuLeft);
 
-	    _tooltips.forEach(function (tooltip) {
-	      tooltip.placement(tooltipSide);
-	    });
+	  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;
 
-	    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
+	    if (entityIDs && _entityExtent && field.locationSetID) {
+	      // is field allowed in this location?
+	      var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+	      if (!validLocations[field.locationSetID]) return false;
+	    }
 
+	    var prerequisiteTag = field.prerequisiteTag;
 
-	        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
+	    if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+	    prerequisiteTag) {
+	      if (!entityIDs.every(function (entityID) {
+	        var entity = context.graph().entity(entityID);
 
+	        if (prerequisiteTag.key) {
+	          var value = entity.tags[prerequisiteTag.key];
+	          if (!value) return false;
+
+	          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 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';
-	        }
+	    return true;
+	  };
 
-	        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
+	  field.focus = function () {
+	    if (field.impl) {
+	      field.impl.focus();
+	    }
+	  };
 
+	  return utilRebind(field, dispatch, 'on');
+	}
 
-	        return 'right';
-	      } else {
-	        // rtl
-	        if (!menuLeft) {
-	          return 'right';
-	        }
+	function uiFormFields(context) {
+	  var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+	  var _fieldsArr = [];
+	  var _lastPlaceholder = '';
+	  var _state = '';
+	  var _klass = '';
 
-	        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
+	  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
 
-	        return 'left';
-	      }
-	    }
-	  }
+	    var enter = fields.enter().append('div').attr('class', function (d) {
+	      return 'wrap-form-field wrap-form-field-' + d.safeid;
+	    }); // Update
 
-	  editMenu.close = function () {
-	    context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
+	    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').call(_t.append('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
 
-	    _menu.remove();
+	      var field = d.field;
+	      field.show();
+	      selection.call(formFields); // rerender
 
-	    _tooltips = [];
-	    dispatch$1.call('toggled', this, false);
-	  };
+	      field.focus();
+	    })); // avoid updating placeholder excessively (triggers style recalc)
 
-	  editMenu.anchorLoc = function (val) {
-	    if (!arguments.length) return _anchorLoc;
-	    _anchorLoc = val;
-	    _anchorLocLonLat = context.projection.invert(_anchorLoc);
-	    return editMenu;
+	    if (_lastPlaceholder !== placeholder) {
+	      input.attr('placeholder', placeholder);
+	      _lastPlaceholder = placeholder;
+	    }
+	  }
+
+	  formFields.fieldsArr = function (val) {
+	    if (!arguments.length) return _fieldsArr;
+	    _fieldsArr = val || [];
+	    return formFields;
 	  };
 
-	  editMenu.triggerType = function (val) {
-	    if (!arguments.length) return _triggerType;
-	    _triggerType = val;
-	    return editMenu;
+	  formFields.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return formFields;
 	  };
 
-	  editMenu.operations = function (val) {
-	    if (!arguments.length) return _operations;
-	    _operations = val;
-	    return editMenu;
+	  formFields.klass = function (val) {
+	    if (!arguments.length) return _klass;
+	    _klass = val;
+	    return formFields;
 	  };
 
-	  return utilRebind(editMenu, dispatch$1, 'on');
+	  return formFields;
 	}
 
-	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]
-	        });
-	      }
+	function uiChangesetEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var formFields = uiFormFields(context);
+	  var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
 
-	      return null;
-	    }).filter(Boolean);
-	    selection.html('');
+	  var _fieldsArr;
 
-	    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
+	  var _tags;
 
-	        context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-	      });
-	    }
+	  var _changesetID;
 
-	    selection.classed('hide', !hiddenList.length);
+	  function changesetEditor(selection) {
+	    render(selection);
 	  }
 
-	  return function (selection) {
-	    update(selection);
-	    context.features().on('change.feature_info', function () {
-	      update(selection);
+	  function render(selection) {
+	    var initial = false;
+
+	    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
+	      })];
+
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch.call('change', field, undefined, t, onInput);
+	        });
+	      });
+	    }
+
+	    _fieldsArr.forEach(function (field) {
+	      field.tags(_tags);
 	    });
-	  };
-	}
 
-	function uiFlash(context) {
-	  var _flashTimer;
+	    selection.call(formFields.fieldsArr(_fieldsArr));
 
-	  var _duration = 2000;
-	  var _iconName = '#iD-icon-no';
-	  var _iconClass = 'disabled';
-	  var _label = '';
+	    if (initial) {
+	      var commentField = selection.select('.form-field-comment textarea');
+	      var commentNode = commentField.node();
 
-	  function flash() {
-	    if (_flashTimer) {
-	      _flashTimer.stop();
-	    }
+	      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
 
-	    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
+	      utilTriggerEvent(commentField, 'blur');
+	      var osm = context.connection();
 
-	    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;
-	  }
+	      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
 
-	  flash.duration = function (_) {
-	    if (!arguments.length) return _duration;
-	    _duration = _;
-	    return flash;
-	  };
 
-	  flash.label = function (_) {
-	    if (!arguments.length) return _label;
-	    _label = _;
-	    return flash;
-	  };
+	    var hasGoogle = _tags.comment.match(/google/i);
 
-	  flash.iconName = function (_) {
-	    if (!arguments.length) return _iconName;
-	    _iconName = _;
-	    return flash;
+	    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').call(_t.append('commit.google_warning'));
+	    commentEnter.transition().duration(200).style('opacity', 1);
+	  }
+
+	  changesetEditor.tags = function (_) {
+	    if (!arguments.length) return _tags;
+	    _tags = _; // Don't reset _fieldsArr here.
+
+	    return changesetEditor;
 	  };
 
-	  flash.iconClass = function (_) {
-	    if (!arguments.length) return _iconClass;
-	    _iconClass = _;
-	    return flash;
+	  changesetEditor.changesetID = function (_) {
+	    if (!arguments.length) return _changesetID;
+	    if (_changesetID === _) return changesetEditor;
+	    _changesetID = _;
+	    _fieldsArr = null;
+	    return changesetEditor;
 	  };
 
-	  return flash;
+	  return utilRebind(changesetEditor, dispatch, 'on');
 	}
 
-	function uiFullScreen(context) {
-	  var element = context.container().node(); // var button = d3_select(null);
+	var JXON = new function () {
+	  var sValueProp = 'keyValue',
+	      sAttributesProp = 'keyAttributes',
+	      sAttrPref = '@',
 
-	  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;
-	    }
-	  }
+	  /* you can customize these values */
+	  aCache = [],
+	      rIsNull = /^\s*$/,
+	      rIsBool = /^(?:true|false)$/i;
 
-	  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 parseText(sValue) {
+	    if (rIsNull.test(sValue)) {
+	      return null;
 	    }
-	  }
-
-	  function isFullScreen() {
-	    return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
-	  }
 
-	  function isSupported() {
-	    return !!getFullScreenFn();
-	  }
+	    if (rIsBool.test(sValue)) {
+	      return sValue.toLowerCase() === 'true';
+	    }
 
-	  function fullScreen(d3_event) {
-	    d3_event.preventDefault();
+	    if (isFinite(sValue)) {
+	      return parseFloat(sValue);
+	    }
 
-	    if (!isFullScreen()) {
-	      // button.classed('active', true);
-	      getFullScreenFn().apply(element);
-	    } else {
-	      // button.classed('active', false);
-	      getExitFullScreenFn().apply(document);
+	    if (isFinite(Date.parse(sValue))) {
+	      return new Date(sValue);
 	    }
+
+	    return sValue;
 	  }
 
-	  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');
+	  function EmptyTree() {}
 
-	    var detected = utilDetect();
-	    var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
-	    context.keybinding().on(keys, fullScreen);
+	  EmptyTree.prototype.toString = function () {
+	    return 'null';
 	  };
-	}
-
-	function uiGeolocate(context) {
-	  var _geolocationOptions = {
-	    // prioritize speed and power usage over precision
-	    enableHighAccuracy: false,
-	    // don't hang indefinitely getting the location
-	    timeout: 6000 // 6sec
 
+	  EmptyTree.prototype.valueOf = function () {
+	    return null;
 	  };
 
-	  var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
+	  function objectify(vValue) {
+	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+	  }
 
-	  var _layer = context.layers().layer('geolocate');
+	  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;
 
-	  var _position;
+	    if (bChildren) {
+	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+	        oNode = oParentNode.childNodes.item(nItem);
 
-	  var _extent;
+	        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);
+	        }
+	      }
+	    }
 
-	  var _timeoutID;
+	    var nLevelEnd = aCache.length,
+	        vBuiltVal = parseText(sCollectedTxt);
 
-	  var _button = select(null);
+	    if (!bHighVerb && (bChildren || bAttributes)) {
+	      vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+	    }
 
-	  function click() {
-	    if (context.inIntro()) return;
+	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+	      sProp = aCache[nElId].nodeName.toLowerCase();
+	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
 
-	    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
+	      if (vResult.hasOwnProperty(sProp)) {
+	        if (vResult[sProp].constructor !== Array) {
+	          vResult[sProp] = [vResult[sProp]];
+	        }
 
-	      navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-	    } else {
-	      _locating.close();
+	        vResult[sProp].push(vContent);
+	      } else {
+	        vResult[sProp] = vContent;
+	        nLength++;
+	      }
+	    }
 
-	      _layer.enabled(null, false);
+	    if (bAttributes) {
+	      var nAttrLen = oParentNode.attributes.length,
+	          sAPrefix = bNesteAttr ? '' : sAttrPref,
+	          oAttrParent = bNesteAttr ? {} : vResult;
 
-	      updateButtonState();
+	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+	        oAttrib = oParentNode.attributes.item(nAttrib);
+	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+	      }
+
+	      if (bNesteAttr) {
+	        if (bFreeze) {
+	          Object.freeze(oAttrParent);
+	        }
+
+	        vResult[sAttributesProp] = oAttrParent;
+	        nLength -= nAttrLen - 1;
+	      }
 	    }
-	  }
 
-	  function zoomTo() {
-	    context.enter(modeBrowse(context));
-	    var map = context.map();
+	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+	      vResult[sValueProp] = vBuiltVal;
+	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+	      vResult = vBuiltVal;
+	    }
 
-	    _layer.enabled(_position, true);
+	    if (bFreeze && (bHighVerb || nLength > 0)) {
+	      Object.freeze(vResult);
+	    }
 
-	    updateButtonState();
-	    map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	    aCache.length = nLevelStart;
+	    return vResult;
 	  }
 
-	  function success(geolocation) {
-	    _position = geolocation;
-	    var coords = _position.coords;
-	    _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-	    zoomTo();
-	    finish();
-	  }
+	  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+	    var vValue, oChild;
 
-	  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 (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()));
 	    }
 
-	    finish();
-	  }
+	    for (var sName in oParentObj) {
+	      vValue = oParentObj[sName];
 
-	  function finish() {
-	    _locating.close(); // unblock ui
+	      if (isFinite(sName) || vValue instanceof Function) {
+	        continue;
+	      }
+	      /* verbosity level is 0 */
 
 
-	    if (_timeoutID) {
-	      clearTimeout(_timeoutID);
-	    }
+	      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);
 
-	    _timeoutID = undefined;
-	  }
+	        if (vValue instanceof Object) {
+	          loadObjTree(oXMLDoc, oChild, vValue);
+	        } else if (vValue !== null && vValue !== true) {
+	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+	        }
 
-	  function updateButtonState() {
-	    _button.classed('active', _layer.enabled());
+	        oParentEl.appendChild(oChild);
+	      }
+	    }
 	  }
 
-	  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);
+	  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);
 	  };
-	}
 
-	function uiPanelBackground(context) {
-	  var background = context.background();
-	  var _currSourceName = null;
-	  var _metadata = {};
-	  var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
+	  this.unbuild = function (oObjTree) {
+	    var oNewDoc = document.implementation.createDocument('', '', null);
+	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
+	    return oNewDoc;
+	  };
 
-	  var debouncedRedraw = debounce(redraw, 250);
+	  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));
 
-	  function redraw(selection) {
-	    var source = background.baseLayerSource();
-	    if (!source) return;
-	    var isDG = source.id.match(/^DigitalGlobe/i) !== null;
-	    var sourceLabel = source.label();
+	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.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('commit.changes')
+	      },
+	      count: summary.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
 
-	    if (_currSourceName !== sourceLabel) {
-	      _currSourceName = sourceLabel;
-	      _metadata = {};
-	    }
+	  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').text(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').text(function (d) {
+	      var name = utilDisplayName(d.entity) || '',
+	          string = '';
 
-	    selection.html('');
-	    var list = selection.append('ul').attr('class', 'background-info');
-	    list.append('li').html(_currSourceName);
+	      if (name !== '') {
+	        string += ':';
+	      }
 
-	    _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]);
+	      return string += ' ' + name;
 	    });
+	    items = itemsEnter.merge(items); // Download changeset link
 
-	    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);
+	    var changeset = new osmChangeset().update({
+	      id: undefined
 	    });
+	    var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    delete changeset.id; // Export without chnageset_id
 
-	    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
+	    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');
 
+	    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);
+	      });
+	    }
 
-	    ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
-	      if (source.id !== layerId) {
-	        var key = layerId + '-vintage';
-	        var sourceVintage = context.background().findSource(key);
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('commit.download_changes'));
 
-	        if (context.background().showsLayer(sourceVintage)) {
-	          context.background().toggleOverlayLayer(sourceVintage);
-	        }
+	    function mouseover(d) {
+	      if (d.entity) {
+	        context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
 	      }
-	    });
-	  }
+	    }
 
-	  var debouncedGetMetadata = debounce(getMetadata, 250);
+	    function mouseout() {
+	      context.surface().selectAll('.hover').classed('hover', false);
+	    }
 
-	  function getMetadata(selection) {
-	    var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
+	    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);
+	      }
+	    }
+	  }
 
-	    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
+	  return section;
+	}
 
-	    _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
+	function uiCommitWarnings(context) {
+	  function commitWarnings(selection) {
+	    var issuesBySeverity = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeDisabledRules: true
+	    });
 
-	      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
+	    for (var severity in issuesBySeverity) {
+	      var issues = issuesBySeverity[severity];
 
-	      _metadataKeys.forEach(function (k) {
-	        if (k === 'zoom' || k === 'vintage') return; // done already
+	      if (severity !== 'error') {
+	        // exclude 'fixme' and similar - #8603
+	        issues = issues.filter(function (issue) {
+	          return issue.type !== 'help_request';
+	        });
+	      }
 
-	        var val = result[k];
-	        _metadata[k] = val;
-	        selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
+	      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);
+	      });
+	    }
 	  }
 
-	  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);
-	    });
-	  };
-
-	  panel.off = function () {
-	    context.map().on('drawn.info-background', null).on('move.info-background', null);
-	  };
-
-	  panel.id = 'background';
-	  panel.label = _t.html('info_panels.background.title');
-	  panel.key = _t('info_panels.background.key');
-	  return panel;
+	  return commitWarnings;
 	}
 
-	function uiPanelHistory(context) {
-	  var osm;
+	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
 
-	  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);
-	  }
+	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	function uiCommit(context) {
+	  var dispatch = dispatch$8('cancel');
 
-	  function displayUser(selection, userName) {
-	    if (!userName) {
-	      selection.append('span').html(_t.html('info_panels.history.unknown'));
-	      return;
-	    }
+	  var _userDetails;
 
-	    selection.append('span').attr('class', 'user-name').html(userName);
-	    var links = selection.append('div').attr('class', 'links');
+	  var _selection;
 
-	    if (osm) {
-	      links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
-	    }
+	  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);
 
-	    links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
-	  }
+	  function commit(selection) {
+	    _selection = selection; // Initialize changeset if one does not exist yet.
 
-	  function displayChangeset(selection, changeset) {
-	    if (!changeset) {
-	      selection.append('span').html(_t.html('info_panels.history.unknown'));
-	      return;
-	    }
+	    if (!context.changeset) initChangeset();
+	    loadDerivedChangesetTags();
+	    selection.call(render);
+	  }
 
-	    selection.append('span').attr('class', 'changeset-id').html(changeset);
-	    var links = selection.append('div').attr('class', 'links');
+	  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
 
-	    if (osm) {
-	      links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
-	    }
+	    if (commentDate > currDate || currDate - commentDate > cutoff) {
+	      corePreferences('comment', null);
+	      corePreferences('hashtags', null);
+	      corePreferences('source', null);
+	    } // load in explicitly-set values, if any
 
-	    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;
+	    if (context.defaultChangesetComment()) {
+	      corePreferences('comment', context.defaultChangesetComment());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	    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 (context.defaultChangesetSource()) {
+	      corePreferences('source', context.defaultChangesetSource());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	      if (selected.length) {
-	        entity = context.entity(selected[0]);
-	      }
+	    if (context.defaultChangesetHashtags()) {
+	      corePreferences('hashtags', context.defaultChangesetHashtags());
+	      corePreferences('commentDate', Date.now());
 	    }
 
-	    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;
+	    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
 
-	    if (entity) {
-	      selection.call(redrawEntity, entity);
-	    } else if (note) {
-	      selection.call(redrawNote, note);
-	    }
-	  }
+	    findHashtags(tags, true);
+	    var hashtags = corePreferences('hashtags');
 
-	  function redrawNote(selection, note) {
-	    if (!note || note.isNew()) {
-	      selection.append('div').html(_t.html('info_panels.history.note_no_history'));
-	      return;
+	    if (hashtags) {
+	      tags.hashtags = hashtags;
 	    }
 
-	    var list = selection.append('ul');
-	    list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
+	    var source = corePreferences('source');
 
-	    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 (source) {
+	      tags.source = source;
 	    }
 
-	    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'));
-	    }
-	  }
+	    var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-	  function redrawEntity(selection, entity) {
-	    if (!entity || entity.isNew()) {
-	      selection.append('div').html(_t.html('info_panels.history.no_history'));
-	      return;
-	    }
+	    if (photoOverlaysUsed.length) {
+	      var sources = (tags.source || '').split(';'); // include this tag for any photo layer
 
-	    var links = selection.append('div').attr('class', 'links');
+	      if (sources.indexOf('streetlevel imagery') === -1) {
+	        sources.push('streetlevel imagery');
+	      } // add the photo overlays used during editing as sources
 
-	    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');
-	    }
 
-	    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);
-	  }
+	      photoOverlaysUsed.forEach(function (photoOverlay) {
+	        if (sources.indexOf(photoOverlay) === -1) {
+	          sources.push(photoOverlay);
+	        }
+	      });
+	      tags.source = context.cleanTagValue(sources.join(';'));
+	    }
 
-	  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);
+	    context.changeset = new osmChangeset({
+	      tags: tags
 	    });
-	  };
+	  } // Calculates read-only metadata tags based on the user's editing session and applies
+	  // them to the changeset.
 
-	  panel.off = function () {
-	    context.map().on('drawn.info-history', null);
-	    context.on('enter.info-history', null);
-	  };
 
-	  panel.id = 'history';
-	  panel.label = _t.html('info_panels.history.title');
-	  panel.key = _t('info_panels.history.key');
-	  return panel;
-	}
+	  function loadDerivedChangesetTags() {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
+	    // assign tags for imagery used
 
-	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
-	 */
+	    var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+	    tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
 
-	function displayLength(m, isImperial) {
-	  var d = m * (isImperial ? 3.28084 : 1);
-	  var unit;
+	    var osmClosed = osm.getClosedIDs();
+	    var itemType;
 
-	  if (isImperial) {
-	    if (d >= 5280) {
-	      d /= 5280;
-	      unit = 'miles';
-	    } else {
-	      unit = 'feet';
-	    }
-	  } else {
-	    if (d >= 1000) {
-	      d /= 1000;
-	      unit = 'kilometers';
-	    } else {
-	      unit = 'meters';
+	    if (osmClosed.length) {
+	      tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
 	    }
-	  }
-
-	  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
-	 */
 
-	function displayArea(m2, isImperial) {
-	  var locale = _mainLocalizer.localeCode();
-	  var d = m2 * (isImperial ? 10.7639111056 : 1);
-	  var d1, d2, area;
-	  var unit1 = '';
-	  var unit2 = '';
+	    if (services.keepRight) {
+	      var krClosed = services.keepRight.getClosedIDs();
 
-	  if (isImperial) {
-	    if (d >= 6969600) {
-	      // > 0.25mi² show mi²
-	      d1 = d / 27878400;
-	      unit1 = 'square_miles';
-	    } else {
-	      d1 = d;
-	      unit1 = 'square_feet';
+	      if (krClosed.length) {
+	        tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
+	      }
 	    }
 
-	    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 (services.improveOSM) {
+	      var iOsmClosed = services.improveOSM.getClosedCounts();
+
+	      for (itemType in iOsmClosed) {
+	        tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+	      }
 	    }
 
-	    if (d > 1000 && d < 10000000) {
-	      // 0.1 - 1000 hectares
-	      d2 = d / 10000;
-	      unit2 = 'hectares';
+	    if (services.osmose) {
+	      var osmoseClosed = services.osmose.getClosedCounts();
+
+	      for (itemType in osmoseClosed) {
+	        tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+	      }
+	    } // remove existing issue counts
+
+
+	    for (var key in tags) {
+	      if (key.match(/(^warnings:)|(^resolved:)/)) {
+	        delete tags[key];
+	      }
 	    }
-	  }
 
-	  area = _t('units.' + unit1, {
-	    quantity: d1.toLocaleString(locale, {
-	      maximumSignificantDigits: 4
-	    })
-	  });
+	    function addIssueCounts(issues, prefix) {
+	      var issuesByType = utilArrayGroupBy(issues, 'type');
 
-	  if (d2) {
-	    return _t('units.area_pair', {
-	      area1: area,
-	      area2: _t('units.' + unit2, {
-	        quantity: d2.toLocaleString(locale, {
-	          maximumSignificantDigits: 2
-	        })
-	      })
-	    });
-	  } else {
-	    return area;
-	  }
-	}
+	      for (var issueType in issuesByType) {
+	        var issuesOfType = issuesByType[issueType];
 
-	function wrap$2(x, min, max) {
-	  var d = max - min;
-	  return ((x - min) % d + d) % d + min;
-	}
+	        if (issuesOfType[0].subtype) {
+	          var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
 
-	function clamp$1(x, min, max) {
-	  return Math.max(min, Math.min(x, max));
-	}
+	          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
 
-	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)
-	    });
-	  }
+	    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
 
-	  if (deg === 0) {
-	    return displayCoordinate;
-	  } else {
-	    return _t('units.coordinate', {
-	      coordinate: displayCoordinate,
-	      direction: _t('units.' + (deg > 0 ? pos : neg))
+	    addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
+
+	    var resolvedIssues = context.validator().getResolvedIssues();
+	    addIssueCounts(resolvedIssues, 'resolved');
+	    context.changeset = context.changeset.update({
+	      tags: tags
 	    });
 	  }
-	}
-	/**
-	 * Returns given coordinate pair in degree-minute-second format.
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
 
+	  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('h2').call(_t.append('commit.title'));
+	    headerTitle.append('button').attr('class', 'close').attr('title', _t('icons.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
 
-	function dmsCoordinatePair(coord) {
-	  return _t('units.coordinate_pair', {
-	    latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
-	    longitude: displayCoordinate(wrap$2(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
-	 */
+	    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 decimalCoordinatePair(coord) {
-	  return _t('units.coordinate_pair', {
-	    latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
-	    longitude: wrap$2(coord[0], -180, 180).toFixed(OSM_PRECISION)
-	  });
-	}
+	    body.call(commitWarnings); // Upload Explanation
 
-	function uiPanelLocation(context) {
-	  var currLocation = '';
+	    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]);
 
-	  function redraw(selection) {
-	    selection.html('');
-	    var list = selection.append('ul'); // Mouse coordinates
+	    if (prose.enter().size()) {
+	      // first time, make sure to update user details in prose
+	      _userDetails = null;
+	    }
 
-	    var coord = context.map().mouseCoordinates();
+	    prose = prose.enter().append('p').attr('class', 'commit-info').call(_t.append('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
 
-	    if (coord.some(isNaN)) {
-	      coord = context.map().center();
-	    }
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      if (_userDetails === user) return; // no change
 
-	    list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
+	      _userDetails = user;
+	      var userLink = select(document.createElement('div'));
 
-	    selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
-	    debouncedGetLocation(selection, coord);
-	  }
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	  var debouncedGetLocation = debounce(getLocation, 250);
+	      userLink.append('a').attr('class', 'user-info').text(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('commit.upload_explanation_with_user', {
+	        user: {
+	          html: userLink.html()
+	        }
+	      }));
+	    }); // Request Review
 
-	  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 requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
+
+	    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);
+
+	    if (!labelEnter.empty()) {
+	      labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));
 	    }
-	  }
 
-	  var panel = function panel(selection) {
-	    selection.call(redraw);
-	    context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
-	      selection.call(redraw);
+	    labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+	    labelEnter.append('span').call(_t.append('commit.request_review')); // Update
+
+	    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
+
+	    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').call(_t.append('commit.cancel'));
+	    var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
+	    uploadButton.append('span').attr('class', 'label').call(_t.append('commit.save'));
+	    var uploadBlockerTooltipText = getUploadBlockerMessage(); // update
+
+	    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
 
-	  panel.off = function () {
-	    context.surface().on('.info-location', null);
-	  };
+	        for (var key in context.changeset.tags) {
+	          // remove any empty keys before upload
+	          if (!key) delete context.changeset.tags[key];
+	        }
 
-	  panel.id = 'location';
-	  panel.label = _t.html('info_panels.location.title');
-	  panel.key = _t('info_panels.location.key');
-	  return panel;
-	}
+	        context.uploader().save(context.changeset);
+	      }
+	    }); // remove any existing tooltip
 
-	function uiPanelMeasurement(context) {
-	  function radiansToMeters(r) {
-	    // using WGS84 authalic radius (6371007.1809 m)
-	    return r * 6371007.1809;
-	  }
+	    uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
 
-	  function steradiansToSqmeters(r) {
-	    // http://gis.stackexchange.com/a/124857/40446
-	    return r / (4 * Math.PI) * 510065621724000;
-	  }
+	    if (uploadBlockerTooltipText) {
+	      buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+	    } // Raw Tag Editor
 
-	  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];
-	    }
+	    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
 
-	    return result;
+	    changesSection.call(commitChanges.render);
+
+	    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 redraw(selection) {
-	    var graph = context.graph();
-	    var selectedNoteID = context.selectedNoteID();
-	    var osm = services.osm;
-	    var isImperial = !_mainLocalizer.usesMetric();
-	    var localeCode = _mainLocalizer.localeCode();
-	    var heading;
-	    var center, location, centroid;
-	    var closed, geometry;
-	    var totalNodeCount,
-	        length = 0,
-	        area = 0,
-	        distance;
+	  function getUploadBlockerMessage() {
+	    var errors = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all'
+	    }).error;
 
-	    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 (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;
 
-	      if (selected.length) {
-	        var extent = geoExtent();
+	      if (!hasChangesetComment) {
+	        return _t('commit.comment_needed_message');
+	      }
+	    }
 
-	        for (var i in selected) {
-	          var entity = selected[i];
+	    return null;
+	  }
 
-	          extent._extend(entity.extent(graph));
+	  function changeTags(_, changed, onInput) {
+	    if (changed.hasOwnProperty('comment')) {
+	      if (changed.comment === undefined) {
+	        changed.comment = '';
+	      }
 
-	          geometry = entity.geometry(graph);
+	      if (!onInput) {
+	        corePreferences('comment', changed.comment);
+	        corePreferences('commentDate', Date.now());
+	      }
+	    }
 
-	          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 (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`
 
-	            if (closed) {
-	              area += steradiansToSqmeters(entity.area(graph));
-	            }
-	          }
-	        }
 
-	        if (selected.length > 1) {
-	          geometry = null;
-	          closed = null;
-	          centroid = null;
-	        }
+	    updateChangeset(changed, onInput);
 
-	        if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
-	          distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
-	        }
+	    if (_selection) {
+	      _selection.call(render);
+	    }
+	  }
 
-	        if (selected.length === 1 && selected[0].type === 'node') {
-	          location = selected[0].loc;
-	        } else {
-	          totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-	        }
+	  function findHashtags(tags, commentOnly) {
+	    var detectedHashtags = commentHashtags();
 
-	        if (!location && !centroid) {
-	          center = extent.center();
-	        }
-	      }
+	    if (detectedHashtags.length) {
+	      // always remove stored hashtags if there are hashtags in the comment - #4304
+	      corePreferences('hashtags', null);
 	    }
 
-	    selection.html('');
-
-	    if (heading) {
-	      selection.append('h4').attr('class', 'measurement-heading').html(heading);
+	    if (!detectedHashtags.length || !commentOnly) {
+	      detectedHashtags = detectedHashtags.concat(hashtagHashtags());
 	    }
 
-	    var list = selection.append('ul');
-	    var coordItem;
+	    var allLowerCase = new Set();
+	    return detectedHashtags.filter(function (hashtag) {
+	      // Compare tags as lowercase strings, but keep original case tags
+	      var lowerCase = hashtag.toLowerCase();
 
-	    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 (!allLowerCase.has(lowerCase)) {
+	        allLowerCase.add(lowerCase);
+	        return true;
+	      }
 
-	    if (totalNodeCount) {
-	      list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
-	    }
+	      return false;
+	    }); // Extract hashtags from `comment`
 
-	    if (area) {
-	      list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, isImperial));
-	    }
+	    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`
 
-	    if (length) {
-	      list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, isImperial));
-	    }
 
-	    if (typeof distance === 'number') {
-	      list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, isImperial));
-	    }
+	    function hashtagHashtags() {
+	      var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+	        if (s[0] !== '#') {
+	          s = '#' + s;
+	        } // prepend '#'
 
-	    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));
-	    }
 
-	    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));
-	    }
+	        var matched = s.match(hashtagRegex);
+	        return matched && matched[0];
+	      }).filter(Boolean); // exclude falsy
 
-	    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));
+	      return matches || [];
 	    }
+	  }
 
-	    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);
-	      });
-	    }
+	  function isReviewRequested(tags) {
+	    var rr = tags.review_requested;
+	    if (rr === undefined) return false;
+	    rr = rr.trim().toLowerCase();
+	    return !(rr === '' || rr === 'no');
 	  }
 
-	  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 updateChangeset(changed, onInput) {
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-	  panel.off = function () {
-	    context.map().on('drawn.info-measurement', null);
-	    context.on('enter.info-measurement', null);
-	  };
+	    Object.keys(changed).forEach(function (k) {
+	      var v = changed[k];
+	      k = context.cleanTagKey(k);
+	      if (readOnlyTags.indexOf(k) !== -1) return;
 
-	  panel.id = 'measurement';
-	  panel.label = _t.html('info_panels.measurement.title');
-	  panel.key = _t('info_panels.measurement.key');
-	  return panel;
-	}
+	      if (v === undefined) {
+	        delete tags[k];
+	      } else if (onInput) {
+	        tags[k] = v;
+	      } else {
+	        tags[k] = context.cleanTagValue(v);
+	      }
+	    });
 
-	var uiInfoPanels = {
-	  background: uiPanelBackground,
-	  history: uiPanelHistory,
-	  location: uiPanelLocation,
-	  measurement: uiPanelMeasurement
-	};
+	    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);
 
-	function uiInfo(context) {
-	  var ids = Object.keys(uiInfoPanels);
-	  var wasActive = ['measurement'];
-	  var panels = {};
-	  var active = {}; // create panels
+	      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
 
-	  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
+	    if (_userDetails && _userDetails.changesets_count !== undefined) {
+	      var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
 
-	      infoPanels.selectAll('.panel-content').each(function (d) {
-	        select(this).call(panels[d]);
-	      });
-	    }
+	      tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-	    info.toggle = function (which) {
-	      var activeids = ids.filter(function (k) {
-	        return active[k];
-	      });
+	      if (changesetsCount <= 100) {
+	        var s;
+	        s = corePreferences('walkthrough_completed');
 
-	      if (which) {
-	        // toggle one
-	        active[which] = !active[which];
+	        if (s) {
+	          tags['ideditor:walkthrough_completed'] = s;
+	        }
 
-	        if (activeids.length === 1 && activeids[0] === which) {
-	          // none active anymore
-	          wasActive = [which];
+	        s = corePreferences('walkthrough_progress');
+
+	        if (s) {
+	          tags['ideditor:walkthrough_progress'] = s;
 	        }
 
-	        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;
-	          });
+	        s = corePreferences('walkthrough_started');
+
+	        if (s) {
+	          tags['ideditor:walkthrough_started'] = s;
 	        }
 	      }
+	    } else {
+	      delete tags.changesets_count;
+	    }
 
-	      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);
+	    if (!fastDeepEqual(context.changeset.tags, tags)) {
+	      context.changeset = context.changeset.update({
+	        tags: tags
 	      });
-	    });
+	    }
 	  }
 
-	  return info;
-	}
-
-	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
+	  commit.reset = function () {
+	    context.changeset = null;
 	  };
-	}
-	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;
-	  }
 
-	  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>';
+	  return utilRebind(commit, dispatch, 'on');
 	}
-	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('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;
+	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');
 
-	  if (replacements) {
-	    reps = Object.assign(replacements, helpStringReplacements);
-	  } else {
-	    reps = helpStringReplacements;
-	  }
+	  modalSelection.okButton = function () {
+	    buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+	      modalSelection.remove();
+	    }).call(_t.append('confirm.okay')).node().focus();
+	    return modalSelection;
+	  };
 
-	  return _t.html(id, reps) // use keyboard key styling for shortcuts
-	  .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+	  return modalSelection;
 	}
 
-	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 uiConflicts(context) {
+	  var dispatch = dispatch$8('cancel', 'save');
+	  var keybinding = utilKeybinding('conflicts');
 
+	  var _origChanges;
 
-	var missingStrings = {};
+	  var _conflictList;
 
-	function checkKey(key, text) {
-	  if (_t(key, {
-	    "default": undefined
-	  }) === undefined) {
-	    if (missingStrings.hasOwnProperty(key)) return; // warn once
+	  var _shownConflictIndex;
 
-	    missingStrings[key] = text;
-	    var missing = key + ': ' + text;
-	    if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
 	  }
-	}
 
-	function localize(obj) {
-	  var key; // Assign name if entity has one..
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
+	  }
 
-	  var name = obj.tags && obj.tags.name;
+	  function tryAgain() {
+	    keybindingOff();
+	    dispatch.call('save');
+	  }
 
-	  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..
+	  function cancel() {
+	    keybindingOff();
+	    dispatch.call('cancel');
+	  }
 
+	  function conflicts(selection) {
+	    keybindingOn();
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'fr').attr('title', _t('icons.close')).on('click', cancel).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('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').call(_t.append('save.conflict.help')); // Download changes link
 
-	  var street = obj.tags && obj.tags['addr:street'];
+	    var detected = utilDetect();
+	    var changeset = new osmChangeset();
+	    delete changeset.id; // Export without changeset_id
 
-	  if (street) {
-	    key = 'intro.graph.name.' + slugify(street);
-	    obj.tags['addr:street'] = _t(key, {
-	      "default": street
+	    var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
 	    });
-	    checkKey(key, street); // Add address details common across walkthrough..
+	    var fileName = 'changes.osc';
+	    var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');
 
-	    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 (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);
 	      });
+	    }
 
-	      if (str) {
-	        if (str.match(/^<.*>$/) !== null) {
-	          delete obj.tags[tag];
-	        } else {
-	          obj.tags[tag] = str;
-	        }
-	      }
-	    });
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('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').call(_t.append('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').call(_t.append('save.title')).on('click.try_again', tryAgain);
+	    buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').call(_t.append('confirm.cancel')).on('click.cancel', cancel);
 	  }
 
-	  return obj;
-	} // 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
-
-	  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 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 (mag > lowerBound && mag < upperBound) {
-	      return false;
+	    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);
 	    }
-	  }
-
-	  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);
-	  if (distance === 0) return 0;else if (distance < 80) return 500;else return 1000;
-	}
-
-	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);
-	    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 resize() {
-	      surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
-	      curtain.cut(darkness.datum());
-	    }
+	    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').call(_t.append('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 (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);
+	    });
 	  }
-	  /**
-	   * 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, html, options) {
-	    options = options || {};
+	  function addChoices(selection) {
+	    var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+	      return d.choices || [];
+	    }); // enter
 
-	    if (typeof box === 'string') {
-	      box = select(box).node();
-	    }
+	    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').text(function (d) {
+	      return d.text;
+	    }); // update
 
-	    if (box && box.getBoundingClientRect) {
-	      box = copyBox(box.getBoundingClientRect());
-	      var containerRect = containerNode.getBoundingClientRect();
-	      box.top -= containerRect.top;
-	      box.left -= containerRect.left;
-	    }
+	    choicesEnter.merge(choices).each(function (d) {
+	      var ul = this.parentNode;
 
-	    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;
-	    }
+	      if (ul.__data__.chosen === d.id) {
+	        choose(null, ul, d);
+	      }
+	    });
+	  }
 
-	    var tooltipBox;
+	  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);
+	  }
 
-	    if (options.tooltipBox) {
-	      tooltipBox = options.tooltipBox;
+	  function zoomToEntity(id, extent) {
+	    context.surface().selectAll('.hover').classed('hover', false);
+	    var entity = context.graph().hasEntity(id);
 
-	      if (typeof tooltipBox === 'string') {
-	        tooltipBox = select(tooltipBox).node();
+	    if (entity) {
+	      if (extent) {
+	        context.map().trimmedExtent(extent);
+	      } else {
+	        context.map().zoomToEase(entity);
 	      }
 
-	      if (tooltipBox && tooltipBox.getBoundingClientRect) {
-	        tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-	      }
-	    } else {
-	      tooltipBox = box;
+	      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)
+	  //     ]
+	  // }
 
-	    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..
-
-
-	        html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
-	      }
 
-	      html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
+	  conflicts.conflictList = function (_) {
+	    if (!arguments.length) return _conflictList;
+	    _conflictList = _;
+	    return conflicts;
+	  };
 
-	      html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
+	  conflicts.origChanges = function (_) {
+	    if (!arguments.length) return _origChanges;
+	    _origChanges = _;
+	    return conflicts;
+	  };
 
-	      if (options.buttonText && options.buttonCallback) {
-	        html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-	      }
+	  conflicts.shownEntityIds = function () {
+	    if (_conflictList && typeof _shownConflictIndex === 'number') {
+	      return [_conflictList[_shownConflictIndex].id];
+	    }
 
-	      var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-	      tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
+	    return [];
+	  };
 
-	      if (options.buttonText && options.buttonCallback) {
-	        var button = tooltip.selectAll('.button-section .button.action');
-	        button.on('click', function (d3_event) {
-	          d3_event.preventDefault();
-	          options.buttonCallback();
-	        });
-	      }
+	  return utilRebind(conflicts, dispatch, 'on');
+	}
 
-	      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 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');
 
-	      if (options.tooltipClass === 'intro-mouse') {
-	        tip.height += 80;
-	      } // trim box dimensions to just the portion that fits in the container..
+	  var _expanded = preference === null ? true : preference === 'true';
 
+	  var _entityIDs = [];
+	  var _issues = [];
 
-	      if (tooltipBox.top + tooltipBox.height > h) {
-	        tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
-	      }
+	  var _activeIssueID;
 
-	      if (tooltipBox.left + tooltipBox.width > w) {
-	        tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
-	      } // determine tooltip placement..
+	  var section = uiSection('entity-issues', context).shouldDisplay(function () {
+	    return _issues.length > 0;
+	  }).label(function () {
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _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);
+	  });
 
+	  function reloadIssues() {
+	    _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+	      includeDisabledRules: true
+	    });
+	  }
 
-	      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 makeActiveIssue(issueID) {
+	    _activeIssueID = issueID;
+	    section.selection().selectAll('.issue-container').classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	  }
 
-	        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 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
 
-	      if (options.duration !== 0 || !tooltip.classed(side)) {
-	        tooltip.call(uiToggle(true));
-	      }
+	    containers.exit().remove(); // Enter
 
-	      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)
+	    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 shiftY = 0;
+	      var extent = d.extent(context.graph());
 
-	      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;
-	        }
+	      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
 
-	      tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
-	    } else {
-	      tooltip.classed('in', false).call(uiToggle(false));
-	    }
-
-	    curtain.cut(box, options.duration);
-	    return tooltip;
-	  };
-
-	  curtain.cut = function (datum, duration) {
-	    darkness.datum(datum).interrupt();
-	    var selection;
+	      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 (duration === 0) {
-	      selection = darkness;
-	    } else {
-	      selection = darkness.transition().duration(duration || 600).ease(linear$1);
-	    }
+	      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).call(_t.append('inspector.no_documentation_key'));
+	      }
+	    }); // Update
 
-	    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';
+	    containers = containers.merge(containersEnter).classed('active', function (d) {
+	      return d.id === _activeIssueID;
 	    });
-	  };
+	    containers.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    }); // fixes
 
-	  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 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
 
-	  function copyBox(src) {
-	    return {
-	      top: src.top,
-	      right: src.right,
-	      bottom: src.bottom,
-	      left: src.left,
-	      width: src.width,
-	      height: src.height
-	    };
-	  }
+	      utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	      new Promise(function (resolve, reject) {
+	        d.onClick(context, resolve, reject);
 
-	  return curtain;
-	}
+	        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';
 
-	function uiIntroWelcome(context, reveal) {
-	  var dispatch$1 = dispatch('done');
-	  var chapter = {
-	    title: 'intro.welcome.title'
-	  };
+	      if (iconName.startsWith('maki')) {
+	        iconName += '-15';
+	      }
 
-	  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
+	      select(this).call(svgIcon('#' + iconName, 'fix-icon'));
 	    });
-	  }
-
-	  function practice() {
-	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: words
+	    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;
+	      }
 
-	  function words() {
-	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: chapters
+	      return null;
 	    });
 	  }
 
-	  function chapters() {
-	    dispatch$1.call('done');
-	    reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
-	      next: _t('intro.navigation.title')
-	    }));
-	  }
-
-	  chapter.enter = function () {
-	    welcome();
-	  };
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	  chapter.exit = function () {
-	    context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
-	  };
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _activeIssueID = null;
+	      reloadIssues();
+	    }
 
-	  chapter.restart = function () {
-	    chapter.exit();
-	    chapter.enter();
+	    return section;
 	  };
 
-	  return utilRebind(chapter, dispatch$1, 'on');
+	  return section;
 	}
 
-	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'
-	  };
+	function uiPresetIcon() {
+	  var _preset;
 
-	  function timeout(f, t) {
-	    timeouts.push(window.setTimeout(f, t));
-	  }
+	  var _geometry;
 
-	  function eventCancel(d3_event) {
-	    d3_event.stopPropagation();
-	    d3_event.preventDefault();
-	  }
+	  var _sizeClass = 'medium';
 
-	  function isTownHallSelected() {
-	    var ids = context.selectedIDs();
-	    return ids.length === 1 && ids[0] === hallId;
+	  function isSmall() {
+	    return _sizeClass === 'small';
 	  }
 
-	  function dragMap() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('initial');
-	    var msec = transitionTime(townHall, context.map().center());
-
-	    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 presetIcon(selection) {
+	    selection.each(render);
+	  }
 
-	        if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-	          context.map().on('move.intro', null);
-	          timeout(function () {
-	            continueTo(zoomMap);
-	          }, 3000);
-	        }
-	      });
-	    }, msec + 100);
+	  function getIcon(p, geom) {
+	    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 continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      nextStep();
-	    }
+	  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;
+	    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 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 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));
+	    svgEnter.append('path').attr('class', 'area').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);
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      nextStep();
+	    if (category) {
+	      categoryBorder.selectAll('path').attr('class', "area ".concat(category.id));
 	    }
 	  }
 
-	  function features() {
-	    var onClick = function onClick() {
-	      continueTo(pointsLinesAreas);
-	    };
+	  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;
+	    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);
+	  }
 
-	    reveal('.surface', helpHtml('intro.navigation.features'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: onClick
+	  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 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 ".concat(w, " ").concat(h));
+	    ['fill', 'stroke'].forEach(function (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));
 	    });
-	    context.map().on('drawn.intro', function () {
-	      reveal('.surface', helpHtml('intro.navigation.features'), {
-	        duration: 0,
-	        buttonText: _t.html('intro.ok'),
-	        buttonCallback: onClick
-	      });
+	    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);
 	    });
 
-	    function continueTo(nextStep) {
-	      context.map().on('drawn.intro', null);
-	      nextStep();
-	    }
-	  }
-
-	  function pointsLinesAreas() {
-	    var onClick = function onClick() {
-	      continueTo(nodesWays);
-	    };
-
-	    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
+	    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);
 	      });
-	    });
-
-	    function continueTo(nextStep) {
-	      context.map().on('drawn.intro', null);
-	      nextStep();
 	    }
+
+	    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 nodesWays() {
-	    var onClick = function onClick() {
-	      continueTo(clickTownHall);
-	    };
+	  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
 
-	    reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: onClick
+	    var w = d;
+	    var h = d;
+	    var y = Math.round(d * 0.72);
+	    var l = Math.round(d * 0.6);
+	    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 ".concat(w, " ").concat(h));
+	    ['casing', 'stroke'].forEach(function (klass) {
+	      lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
 	    });
-	    context.map().on('drawn.intro', function () {
-	      reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
-	        duration: 0,
-	        buttonText: _t.html('intro.ok'),
-	        buttonCallback: onClick
-	      });
+	    [[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);
 	    });
-
-	    function continueTo(nextStep) {
-	      context.map().on('drawn.intro', null);
-	      nextStep();
-	    }
+	    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 clickTownHall() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('initial');
-	    var entity = context.hasEntity(hallId);
-	    if (!entity) return;
-	    reveal(null, null, {
-	      duration: 0
+	  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
+
+	    var w = d;
+	    var h = d;
+	    var y1 = Math.round(d * 0.80);
+	    var y2 = Math.round(d * 0.68);
+	    var l = Math.round(d * 0.6);
+	    var r = 2;
+	    var x1 = (w - l) / 2;
+	    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 ".concat(w, " ").concat(h));
+	    ['casing', 'stroke'].forEach(function (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));
 	    });
-	    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
+	    [[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);
+	    });
+	    route = routeEnter.merge(route);
 
-	    context.history().on('change.intro', function () {
-	      if (!context.hasEntity(hallId)) {
-	        continueTo(clickTownHall);
+	    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));
 	      }
-	    });
+	    }
+	  }
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
+	  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 selectedTownHall() {
-	    if (!isTownHallSelected()) return clickTownHall();
-	    var entity = context.hasEntity(hallId);
-	    if (!entity) return clickTownHall();
-	    var box = pointBox(entity.loc, context);
+	  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 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);
-	      }
-	    });
+	  var routeSegments = {
+	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
+	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+	    trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+	    detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
+	    ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
+	    foot: ['highway/footway', 'highway/footway', 'highway/footway'],
+	    hiking: ['highway/path', 'highway/path', 'highway/path'],
+	    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'],
+	    road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
+	    subway: ['railway/subway', 'railway/subway', 'railway/subway'],
+	    train: ['railway/rail', 'railway/rail', 'railway/rail'],
+	    tram: ['railway/tram', 'railway/tram', 'railway/tram'],
+	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
+	  };
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
-	  }
+	  function render() {
+	    var p = _preset.apply(this, arguments);
 
-	  function editorTownHall() {
-	    if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
+	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+	      geom = 'route';
+	    }
 
-	    var onClick = function onClick() {
-	      continueTo(presetTownHall);
-	    };
+	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    var isFallback = isSmall() && p.isFallback && p.isFallback();
+	    var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
+	    var picon = getIcon(p, geom);
+	    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 && !isCategory;
+	    var drawRoute = picon && geom === 'route';
+	    var isFramed = drawVertex || drawArea || drawLine || drawRoute || isCategory;
+	    var tags = !isCategory ? p.setTags({}, geom) : {};
 
-	    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);
+	    for (var k in tags) {
+	      if (tags[k] === '*') {
+	        tags[k] = 'yes';
 	      }
-	    });
-
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      context.history().on('change.intro', null);
-	      context.container().select('.inspector-wrap').on('wheel.intro', null);
-	      nextStep();
 	    }
+
+	    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);
 	  }
 
-	  function presetTownHall() {
-	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+	  presetIcon.preset = function (val) {
+	    if (!arguments.length) return _preset;
+	    _preset = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+	  presetIcon.geometry = function (val) {
+	    if (!arguments.length) return _geometry;
+	    _geometry = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
+	  presetIcon.sizeClass = function (val) {
+	    if (!arguments.length) return _sizeClass;
+	    _sizeClass = val;
+	    return presetIcon;
+	  };
 
-	    var entity = context.entity(context.selectedIDs()[0]);
-	    var preset = _mainPresetIndex.match(entity, context.graph());
+	  return presetIcon;
+	}
 
-	    var onClick = function onClick() {
-	      continueTo(fieldsTownHall);
-	    };
+	function uiSectionFeatureType(context) {
+	  var dispatch = dispatch$8('choose');
+	  var _entityIDs = [];
+	  var _presets = [];
 
-	    reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
-	      preset: preset.name()
-	    }), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: onClick
+	  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();
 	    });
-	    context.on('exit.intro', function () {
-	      continueTo(clickTownHall);
+	    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;
 	    });
-	    context.history().on('change.intro', function () {
-	      if (!context.hasEntity(hallId)) {
-	        continueTo(clickTownHall);
-	      }
+	    nameparts.exit().remove();
+	    nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+	      return d;
 	    });
-
-	    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..
-
-	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets; // don't reload the same preset
 
-	    var onClick = function onClick() {
-	      continueTo(closeTownHall);
-	    };
+	    if (!utilArrayIdentical(val, _presets)) {
+	      _presets = val;
 
-	    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);
+	      if (_presets.length === 1) {
+	        _tagReference = uiTagReference(_presets[0].reference()).showing(false);
 	      }
-	    });
-
-	    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
-	      });
-	    });
+	    return section;
+	  };
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
+	  function entityGeometries() {
+	    var counts = {};
+
+	    for (var i in _entityIDs) {
+	      var geometry = context.graph().geometry(_entityIDs[i]);
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
 	    }
-	  }
 
-	  function searchStreet() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('initial'); // ensure spring street exists
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
+	  }
 
-	    var msec = transitionTime(springStreet, context.map().center());
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
-	    }
+	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);
 
-	    context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
+	  var _state;
 
-	    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);
-	  }
+	  var _fieldsArr;
 
-	  function checkSearchResult() {
-	    var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
+	  var _presets = [];
 
-	    var firstName = first.select('.entity-name');
-	    var name = _t('intro.graph.name.spring-street');
+	  var _tags;
 
-	    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);
-	    }
+	  var _entityIDs;
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
-	      nextStep();
-	    }
-	  }
+	  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;
 
-	  function selectedStreet() {
-	    if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	      return searchStreet();
-	    }
+	      _presets.forEach(function (preset) {
+	        var fields = preset.fields();
+	        var moreFields = preset.moreFields();
+	        allFields = utilArrayUnion(allFields, fields);
+	        allMoreFields = utilArrayUnion(allMoreFields, moreFields);
 
-	    var onClick = function onClick() {
-	      continueTo(editorStreet);
-	    };
+	        if (!sharedTotalFields) {
+	          sharedTotalFields = utilArrayUnion(fields, moreFields);
+	        } else {
+	          sharedTotalFields = sharedTotalFields.filter(function (field) {
+	            return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+	          });
+	        }
+	      });
 
-	    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
-	        });
+	      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));
+	        }
 	      });
-	    }, 600); // after reveal.
+	      var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
 
-	    context.on('enter.intro', function (mode) {
-	      if (!context.hasEntity(springStreetId)) {
-	        return continueTo(searchStreet);
+	      if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+	        _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
 	      }
 
-	      var ids = context.selectedIDs();
-
-	      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)
-	      }
-	    });
+	      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
+	          }));
+	        }
+	      });
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
+	      _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);
+	        });
+	      });
 	    }
-	  }
 
-	  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
-	      });
+	    _fieldsArr.forEach(function (field) {
+	      field.state(_state).tags(_tags);
 	    });
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
-	  }
-
-	  function play() {
-	    dispatch$1.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');
+	    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));
 	      }
 	    });
 	  }
 
-	  chapter.enter = function () {
-	    dragMap();
-	  };
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
 
-	  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);
-	  };
+	    if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+	      _presets = val;
+	      _fieldsArr = null;
+	    }
 
-	  chapter.restart = function () {
-	    chapter.exit();
-	    chapter.enter();
+	    return section;
 	  };
 
-	  return utilRebind(chapter, dispatch$1, 'on');
-	}
-
-	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;
-	  var chapter = {
-	    title: 'intro.points.title'
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return section;
 	  };
 
-	  function timeout(f, t) {
-	    timeouts.push(window.setTimeout(f, t));
-	  }
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val; // Don't reset _fieldsArr here.
 
-	  function eventCancel(d3_event) {
-	    d3_event.stopPropagation();
-	    d3_event.preventDefault();
-	  }
+	    return section;
+	  };
 
-	  function addPoint() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('initial');
-	    var msec = transitionTime(intersection, context.map().center());
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
+	    if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _fieldsArr = null;
 	    }
 
-	    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);
-
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	    return section;
+	  };
 
-	  function placePoint() {
-	    if (context.mode().id !== 'add-point') {
-	      return chapter.restart();
-	    }
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	    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 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.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('inspector.members')
+	      },
+	      count: count
 	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	  var _entityIDs;
 
-	  function searchPreset() {
-	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	      return addPoint();
-	    } // disallow scrolling
+	  var _maxMembers = 1000;
 
+	  function downloadMember(d3_event, d) {
+	    d3_event.preventDefault(); // display the loading indicator
 
-	    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);
-	      }
+	    select(this.parentNode).classed('tag-reference-loading', true);
+	    context.loadEntity(d.id, function () {
+	      section.reRender();
+	    });
+	  }
 
-	      var ids = context.selectedIDs();
+	  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
 
-	      if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-	        // keep the user's point selected..
-	        context.enter(modeSelect(context, [_pointID])); // disallow scrolling
+	    utilHighlightEntities([d.id], true, 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.points.search_cafe', {
-	          preset: cafePreset.name()
-	        }));
-	        context.history().on('change.intro', null);
-	      }
-	    });
+	  function selectMember(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	    function checkPresetSearch() {
-	      var first = context.container().select('.preset-list-item:first-child');
+	    utilHighlightEntities([d.id], false, context);
+	    var entity = context.entity(d.id);
+	    var mapExtent = context.map().extent();
 
-	      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);
-	        });
-	      }
+	    if (!entity.intersects(mapExtent, context.graph())) {
+	      // zoom to the entity if its extent is not visible now
+	      context.map().zoomToEase(entity);
 	    }
 
-	    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();
-	    }
+	    context.enter(modeSelect(context, [d.id]));
 	  }
 
-	  function aboutFeatureEditor() {
-	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	      return addPoint();
-	    }
-
-	    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 changeRole(d3_event, d) {
+	    var oldRole = d.role;
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
+	    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();
 	    }
 	  }
 
-	  function addName() {
-	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	      return addPoint();
-	    } // reset pane, in case user happened to change it..
+	  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();
+	    }
+	  }
 
-	    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);
+	  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 (entity.tags.name) {
-	        var tooltip = reveal('.entity-editor-pane', addNameString, {
-	          tooltipClass: 'intro-points-describe',
-	          buttonText: _t.html('intro.ok'),
-	          buttonCallback: function buttonCallback() {
-	            continueTo(addCloseEditor);
-	          }
+	      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);
 	        });
-	        tooltip.select('.instruction').style('display', 'none');
-	      } else {
-	        reveal('.entity-editor-pane', addNameString, {
-	          tooltipClass: 'intro-points-describe'
+	        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('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').call(_t.append('inspector.' + d.type, {
+	          id: d.id
+	        }));
+	        labelText.append('span').attr('class', 'member-entity-name').call(_t.append('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);
 	      }
-	    }, 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);
 	    });
+	    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);
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
-	  }
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    } // update
 
-	  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();
-	    }
-	  }
+	    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();
 
-	  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..
+	        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;
+	          }
 
-	    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());
+	          return 'translateY(-100%)';
+	        } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	          if (targetIndex === null || index2 < targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
-	    }
+	          return 'translateY(100%)';
+	        }
 
-	    context.map().centerEase(entity.loc, msec);
-	    timeout(function () {
-	      var box = pointBox(entity.loc, context);
-	      reveal(box, helpHtml('intro.points.reselect'), {
-	        duration: 600
+	        return 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, helpHtml('intro.points.reselect'), {
-	            duration: 0
-	          });
-	        });
-	      }, 600); // after reveal..
+	    }).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);
 
-	      context.on('enter.intro', function (mode) {
-	        if (mode.id !== 'select') return;
-	        continueTo(updatePoint);
-	      });
-	    }, msec + 100);
+	      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 bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
+
+	      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]);
+	          }
+	        }
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	        return sameletter.concat(other);
+	      }
 
-	  function updatePoint() {
-	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	      return continueTo(reselectPoint);
-	    } // reset pane, in case user happened to untag the point..
+	      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';
+	        }
 
-	    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);
+	        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);
+	      }));
+	    }
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
 	    }
 	  }
 
-	  function updateCloseEditor() {
-	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	      return continueTo(reselectPoint);
-	    } // reset pane, in case user happened to change it..
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
+	  return section;
+	}
 
-	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	    context.on('exit.intro', function () {
-	      continueTo(rightClickPoint);
+	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;
 	    });
-	    timeout(function () {
-	      reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
-	        button: icon('#iD-icon-close', 'inline')
-	      }));
-	    }, 500);
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
+	    for (var i in memberIndexes) {
+	      graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
 	    }
-	  }
 
-	  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
+	    return graph;
+	  };
+	}
 
-	    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 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.html('inspector.title_count', {
+	      title: {
+	        html: _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 = [];
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      context.map().on('move.intro', null);
-	      nextStep();
-	    }
-	  }
+	  var _showBlank;
 
-	  function enterDelete() {
-	    if (!_pointID) return chapter.restart();
-	    var entity = context.hasEntity(_pointID);
-	    if (!entity) return chapter.restart();
-	    var node = selectMenuItem(context, 'delete').node();
+	  var _maxMemberships = 1000;
 
-	    if (!node) {
-	      return continueTo(rightClickPoint);
-	    }
+	  function getSharedParentRelations() {
+	    var parents = [];
 
-	    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
+	    for (var i = 0; i < _entityIDs.length; i++) {
+	      var entity = context.graph().hasEntity(_entityIDs[i]);
+	      if (!entity) continue;
 
-	    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);
+	      if (i === 0) {
+	        parents = context.graph().parentRelations(entity);
+	      } else {
+	        parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
 	      }
-	    });
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro', null);
-	      context.history().on('change.intro', null);
-	      context.on('exit.intro', null);
-	      nextStep();
+	      if (!parents.length) break;
 	    }
-	  }
-
-	  function undo() {
-	    context.history().on('change.intro', function () {
-	      continueTo(play);
-	    });
-	    reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-	    function continueTo(nextStep) {
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
+	    return parents;
 	  }
 
-	  function play() {
-	    dispatch$1.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');
-	      }
-	    });
-	  }
+	  function getMemberships() {
+	    var memberships = [];
+	    var relations = getSharedParentRelations().slice(0, _maxMemberships);
+	    var isMultiselect = _entityIDs.length > 1;
+	    var i, relation, membership, index, member, indexedMember;
 
-	  chapter.enter = function () {
-	    addPoint();
-	  };
+	    for (i = 0; i < relations.length; i++) {
+	      relation = relations[i];
+	      membership = {
+	        relation: relation,
+	        members: [],
+	        hash: osmEntity.key(relation)
+	      };
 
-	  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);
-	  };
+	      for (index = 0; index < relation.members.length; index++) {
+	        member = relation.members[index];
 
-	  chapter.restart = function () {
-	    chapter.exit();
-	    chapter.enter();
-	  };
+	        if (_entityIDs.indexOf(member.id) !== -1) {
+	          indexedMember = Object.assign({}, member, {
+	            index: index
+	          });
+	          membership.members.push(indexedMember);
+	          membership.hash += ',' + index.toString();
 
-	  return utilRebind(chapter, dispatch$1, 'on');
-	}
+	          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)
+	            };
+	          }
+	        }
+	      }
 
-	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 = [];
+	      if (membership.members.length) memberships.push(membership);
+	    }
 
-	  var _areaID;
+	    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 chapter = {
-	    title: 'intro.areas.title'
-	  };
+	  function selectRelation(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	  function timeout(f, t) {
-	    timeouts.push(window.setTimeout(f, t));
+	    utilHighlightEntities([d.relation.id], false, context);
+	    context.enter(modeSelect(context, [d.relation.id]));
 	  }
 
-	  function eventCancel(d3_event) {
-	    d3_event.stopPropagation();
+	  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
 
-	  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);
+	    utilHighlightEntities([d.relation.id], true, context);
 	  }
 
-	  function addArea() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('initial');
-	    _areaID = null;
-	    var msec = transitionTime(playground, context.map().center());
+	  function changeRole(d3_event, d) {
+	    if (d === 0) return; // called on newrow (shouldn't happen)
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
-	    }
+	    if (_inChange) return; // avoid accidental recursive call #5731
 
-	    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);
+	    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;
+	    });
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      nextStep();
+	    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();
 	    }
+
+	    _inChange = false;
 	  }
 
-	  function startPlayground() {
-	    if (context.mode().id !== 'add-area') {
-	      return chapter.restart();
-	    }
+	  function addMembership(d, role) {
+	    this.blur(); // avoid keeping focus on the button
 
-	    _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
+	    _showBlank = false;
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
+	    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);
+	        }
+
+	        return graph;
+	      };
 	    }
-	  }
 
-	  function continuePlayground() {
-	    if (context.mode().id !== 'draw-area') {
-	      return chapter.restart();
+	    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`
+
+	      context.enter(modeSelect(context, [relation.id]).newFeature(true));
 	    }
+	  }
 
-	    _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
+	  function deleteMembership(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button
 
-	    context.on('enter.intro', function (mode) {
-	      if (mode.id === 'draw-area') {
-	        var entity = context.hasEntity(context.selectedIDs()[0]);
+	    if (d === 0) return; // called on newrow (shouldn't happen)
+	    // remove the hover-highlight styling
 
-	        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();
-	      }
+	    utilHighlightEntities([d.relation.id], false, context);
+	    var indexes = d.members.map(function (member) {
+	      return member.index;
 	    });
-
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
+	    context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+	      n: _entityIDs.length
+	    }));
+	    context.validator().validate();
 	  }
 
-	  function finishPlayground() {
-	    if (context.mode().id !== 'draw-area') {
-	      return chapter.restart();
+	  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();
+
+	    function baseDisplayLabel(entity) {
+	      var matched = _mainPresetIndex.match(entity, graph);
+	      var presetName = matched && matched.name() || _t('inspector.relation');
+	      var entityName = utilDisplayName(entity) || '';
+	      return presetName + ' ' + entityName;
 	    }
 
-	    _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
+	    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
 	        });
 	      });
-	    }, 250); // after reveal
+	      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;
+	        });
+	      });
+	    }
+
+	    result.forEach(function (obj) {
+	      obj.title = obj.value;
+	    });
+	    result.unshift(newRelation);
+	    callback(result);
+	  }
 
-	    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 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
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	    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
 
-	  function searchPresets() {
-	    if (!_areaID || !context.hasEntity(_areaID)) {
-	      return addArea();
-	    }
+	    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').text(function (d) {
+	      var matched = _mainPresetIndex.match(d.relation, context.graph());
+	      return matched && matched.name() || _t.html('inspector.relation');
+	    });
+	    labelLink.append('span').attr('class', 'member-entity-name').text(function (d) {
+	      return utilDisplayName(d.relation);
+	    });
+	    labelEnter.append('button').attr('class', 'remove member-delete').attr('title', _t('icons.remove')).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);
 
-	    var ids = context.selectedIDs();
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    }
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	      context.enter(modeSelect(context, [_areaID]));
-	    } // disallow scrolling
+	    var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
 
+	    newMembership.exit().remove(); // Enter
 
-	    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..
+	    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').attr('title', _t('icons.remove')).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
 
-	    context.on('enter.intro', function (mode) {
-	      if (!_areaID || !context.hasEntity(_areaID)) {
-	        return continueTo(addArea);
-	      }
+	    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 ids = context.selectedIDs();
+	    var addRow = selection.selectAll('.add-row').data([0]); // enter
 
-	      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..
+	    var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+	    var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation').attr('aria-label', _t('inspector.add_to_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
 
-	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // update
 
-	        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);
-	      }
+	    addRow = addRow.merge(addRowEnter);
+	    addRow.select('.add-relation').on('click', function () {
+	      _showBlank = true;
+	      section.reRender();
+	      list.selectAll('.member-entity-input').node().focus();
 	    });
 
-	    function checkPresetSearch() {
-	      var first = context.container().select('.preset-list-item:first-child');
-
-	      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 acceptEntity(d) {
+	      if (!d) {
+	        cancelEntity();
+	        return;
+	      } // remove hover-higlighting
 
-	    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();
+	      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 ids = context.selectedIDs();
+	    function cancelEntity() {
+	      var input = newMembership.selectAll('.member-entity-input');
+	      input.property('value', ''); // remove hover-higlighting
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	      return searchPresets();
+	      context.surface().selectAll('.highlighted').classed('highlighted', false);
 	    }
 
-	    if (!context.container().select('.form-field-description').empty()) {
-	      return continueTo(describePlayground);
-	    } // disallow scrolling
-
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	    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.
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	      var entity = context.entity(_areaID);
+	        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]);
+	          }
+	        }
 
-	      if (entity.tags.description) {
-	        return continueTo(play);
-	      } // scroll "Add field" into view
+	        return sameletter.concat(other);
+	      }
 
+	      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);
+	      }));
+	    }
 
-	      var box = context.container().select('.more-fields').node().getBoundingClientRect();
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
+	    }
+	  }
 
-	      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);
-	          };
-	        });
-	      }
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _showBlank = false;
+	    return section;
+	  };
 
-	      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
+	  return section;
+	}
 
-	    context.on('exit.intro', function () {
-	      return continueTo(searchPresets);
+	function uiSectionSelectionList(context) {
+	  var _selectedIDs = [];
+	  var section = uiSection('selected-features', context).shouldDisplay(function () {
+	    return _selectedIDs.length > 1;
+	  }).label(function () {
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('inspector.features')
+	      },
+	      count: _selectedIDs.length
 	    });
-
-	    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();
+	  }).disclosureContent(renderDisclosureContent);
+	  context.history().on('change.selectionList', function (difference) {
+	    if (difference) {
+	      section.reRender();
 	    }
+	  });
+
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _selectedIDs;
+	    _selectedIDs = val;
+	    return section;
+	  };
+
+	  function selectEntity(d3_event, entity) {
+	    context.enter(modeSelect(context, [entity.id]));
 	  }
 
-	  function chooseDescriptionField() {
-	    if (!_areaID || !context.hasEntity(_areaID)) {
-	      return addArea();
-	    }
+	  function deselectEntity(d3_event, entity) {
+	    var selectedIDs = _selectedIDs.slice();
 
-	    var ids = context.selectedIDs();
+	    var index = selectedIDs.indexOf(entity.id);
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	      return searchPresets();
+	    if (index > -1) {
+	      selectedIDs.splice(index, 1);
+	      context.enter(modeSelect(context, selectedIDs));
 	    }
+	  }
 
-	    if (!context.container().select('.form-field-description').empty()) {
-	      return continueTo(describePlayground);
-	    } // Make sure combobox is ready..
+	  function renderDisclosureContent(selection) {
+	    var list = selection.selectAll('.feature-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
 
+	    var entities = _selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
 
-	    if (context.container().select('div.combobox').empty()) {
-	      return continueTo(clickAddField);
-	    } // Watch for the combobox to go away..
+	    var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+	    items.exit().remove(); // Enter
 
+	    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
 
-	    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
+	    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());
 	    });
-	    context.on('exit.intro', function () {
-	      return continueTo(searchPresets);
+	    items.selectAll('.entity-type').text(function (entity) {
+	      return _mainPresetIndex.match(entity, context.graph()).name();
+	    });
+	    items.selectAll('.entity-name').text(function (d) {
+	      // fetch latest entity
+	      var entity = context.entity(d.id);
+	      return utilDisplayName(entity);
 	    });
-
-	    function continueTo(nextStep) {
-	      if (watcher) window.clearInterval(watcher);
-	      context.on('exit.intro', null);
-	      nextStep();
-	    }
 	  }
 
-	  function describePlayground() {
-	    if (!_areaID || !context.hasEntity(_areaID)) {
-	      return addArea();
-	    }
+	  return section;
+	}
 
-	    var ids = context.selectedIDs();
+	function uiEntityEditor(context) {
+	  var dispatch = dispatch$8('choose');
+	  var _state = 'select';
+	  var _coalesceChanges = false;
+	  var _modified = false;
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	      return searchPresets();
-	    } // reset pane, in case user happened to change it..
+	  var _base;
 
+	  var _entityIDs;
 
-	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	  var _activePresets = [];
 
-	    if (context.container().select('.form-field-description').empty()) {
-	      return continueTo(retryChooseDescription);
-	    }
+	  var _newFeature;
 
-	    context.on('exit.intro', function () {
-	      continueTo(play);
-	    });
-	    reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
-	      button: icon('#iD-icon-close', 'inline')
-	    }), {
-	      duration: 300
-	    });
+	  var _sections;
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
-	    }
-	  }
+	  function entityEditor(selection) {
+	    var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-	  function retryChooseDescription() {
-	    if (!_areaID || !context.hasEntity(_areaID)) {
-	      return addArea();
-	    }
+	    var header = selection.selectAll('.header').data([0]); // Enter
 
-	    var ids = context.selectedIDs();
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    var direction = _mainLocalizer.textDirection() === 'rtl' ? 'forward' : 'backward';
+	    headerEnter.append('button').attr('class', 'preset-reset preset-choose').attr('title', _t("icons.".concat(direction))).call(svgIcon("#iD-icon-".concat(direction)));
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	    headerEnter.append('h2'); // Update
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	      return searchPresets();
-	    } // reset pane, in case user happened to change it..
+	    header = header.merge(headerEnter);
+	    header.selectAll('h2').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
 
+	    var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-	    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);
-	    });
+	    var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
+	    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 play() {
-	    dispatch$1.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');
+	    _sections.forEach(function (section) {
+	      if (section.entityIDs) {
+	        section.entityIDs(_entityIDs);
 	      }
-	    });
-	  }
-
-	  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);
-	  };
 
-	  chapter.restart = function () {
-	    chapter.exit();
-	    chapter.enter();
-	  };
+	      if (section.presets) {
+	        section.presets(_activePresets);
+	      }
 
-	  return utilRebind(chapter, dispatch$1, 'on');
-	}
+	      if (section.tags) {
+	        section.tags(combinedTags);
+	      }
 
-	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'
-	  };
+	      if (section.state) {
+	        section.state(_state);
+	      }
 
-	  function timeout(f, t) {
-	    timeouts.push(window.setTimeout(f, t));
-	  }
+	      body.call(section.render);
+	    });
 
-	  function eventCancel(d3_event) {
-	    d3_event.stopPropagation();
-	    d3_event.preventDefault();
-	  }
+	    context.history().on('change.entity-editor', historyChanged);
 
-	  function addLine() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('initial');
-	    var msec = transitionTime(tulipRoadStart, context.map().center());
+	    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 (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
+	      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.
 
-	    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 changeTags(entityIDs, changed, onInput) {
+	    var actions = [];
 
-	  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);
-	    });
+	    for (var i in entityIDs) {
+	      var entityID = entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
+
+	        if (_typeof(v) === 'object') {
+	          // a "key only" tag change
+	          tags[k] = tags[v.oldKey];
+	        } else if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
+	        }
+	      }
+
+	      if (!onInput) {
+	        tags = utilCleanTags(tags);
+	      }
+
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
 	    }
-	  }
 
-	  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
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
 	        });
-	      });
-	    }, 550); // after easing..
+	        return graph;
+	      };
 
-	    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;
+	      var annotation = _t('operations.change_tags.annotation');
+
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
 	      } else {
-	        return chapter.restart();
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = !!onInput;
 	      }
-	    });
+	    } // if leaving field (blur event), rerun validation
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
+
+	    if (!onInput) {
+	      context.validator().validate();
 	    }
 	  }
 
-	  function isLineConnected() {
-	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+	  function revertTags(keys) {
+	    var actions = [];
 
-	    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;
-	      });
-	    });
-	  }
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var original = context.graph().base().entities[entityID];
+	      var changed = {};
 
-	  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);
-	  }
+	      for (var j in keys) {
+	        var key = keys[j];
+	        changed[key] = original ? original.tags[key] : undefined;
+	      }
 
-	  function continueLine() {
-	    if (context.mode().id !== 'draw-line') return chapter.restart();
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
 
-	    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();
-	    });
+	        if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
+	        }
+	      }
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      nextStep();
+	      tags = utilCleanTags(tags);
+
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
 	    }
-	  }
 
-	  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
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
 
-	    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
+	      var annotation = _t('operations.change_tags.annotation');
 
-	    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 (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
+	      } else {
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = false;
+	      }
 	    }
+
+	    context.validator().validate();
 	  }
 
-	  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);
+	  entityEditor.modified = function (val) {
+	    if (!arguments.length) return _modified;
+	    _modified = val;
+	    return entityEditor;
+	  };
 
-	    function continueTo(nextStep) {
-	      context.container().select('.preset-list-button').on('click.intro', null);
-	      context.on('exit.intro', null);
-	      nextStep();
-	    }
-	  } // selected wrong road type
+	  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
 
-	  function retryPresetResidential() {
-	    if (context.mode().id !== 'select') return chapter.restart();
-	    context.on('exit.intro', function () {
-	      return chapter.restart();
-	    }); // disallow scrolling
+	    _base = context.graph();
+	    _coalesceChanges = false;
+	    if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
 
-	    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);
+	    _entityIDs = val;
+	    loadActivePresets(true);
+	    return entityEditor.modified(false);
+	  };
 
-	    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();
+	  entityEditor.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return entityEditor;
+	  };
+
+	  function loadActivePresets(isForNewSelection) {
+	    var graph = context.graph();
+	    var counts = {};
+
+	    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 nameRoad() {
-	    context.on('exit.intro', function () {
-	      continueTo(didNameRoad);
+	    var matches = Object.keys(counts).sort(function (p1, p2) {
+	      return counts[p2] - counts[p1];
+	    }).map(function (pID) {
+	      return _mainPresetIndex.item(pID);
 	    });
-	    timeout(function () {
-	      reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
-	        button: icon('#iD-icon-close', 'inline')
-	      }), {
-	        tooltipClass: 'intro-lines-name_road'
-	      });
-	    }, 500);
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
+	    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;
 	    }
+
+	    entityEditor.presets(matches);
 	  }
 
-	  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);
+	  entityEditor.presets = function (val) {
+	    if (!arguments.length) return _activePresets; // don't reload the same preset
 
-	    function continueTo(nextStep) {
-	      nextStep();
+	    if (!utilArrayIdentical(val, _activePresets)) {
+	      _activePresets = val;
 	    }
-	  }
 
-	  function updateLine() {
-	    context.history().reset('doneAddLine');
+	    return entityEditor;
+	  };
 
-	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	      return chapter.restart();
-	    }
+	  return utilRebind(entityEditor, dispatch, 'on');
+	}
 
-	    var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
+	var sexagesimal = {exports: {}};
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
-	    }
+	sexagesimal.exports = element;
+	var pair_1 = sexagesimal.exports.pair = pair;
+	sexagesimal.exports.format = format;
+	sexagesimal.exports.formatPair = formatPair;
+	sexagesimal.exports.coordToDMS = coordToDMS;
 
-	    context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
-	    timeout(function () {
-	      var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	      var box = pad(woodRoadDragMidpoint, padding, context);
+	function element(input, dims) {
+	  var result = search(input, dims);
+	  return result === null ? null : result.val;
+	}
 
-	      var advance = function advance() {
-	        continueTo(addNode);
-	      };
+	function formatPair(input) {
+	  return format(input.lat, 'lat') + ' ' + format(input.lon, 'lon');
+	} // Is 0 North or South?
 
-	      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);
-	      nextStep();
-	    }
-	  }
+	function format(input, dim) {
+	  var dms = coordToDMS(input, dim);
+	  return dms.whole + '° ' + (dms.minutes ? dms.minutes + '\' ' : '') + (dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
+	}
 
-	  function addNode() {
-	    context.history().reset('doneAddLine');
+	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
+	  };
+	}
 
-	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	      return chapter.restart();
-	    }
+	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
 
-	    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);
-	      }
+	  var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-	      if (changed.created().length === 1) {
-	        timeout(function () {
-	          continueTo(startDragEndpoint);
-	        }, 500);
-	      }
-	    });
-	    context.on('enter.intro', function (mode) {
-	      if (mode.id !== 'select') {
-	        continueTo(updateLine);
-	      }
-	    });
+	  var dim;
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	  if (m[1] && m[5]) {
+	    // if matched both..
+	    dim = m[1]; // keep leading
 
-	  function startDragEndpoint() {
-	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	      return continueTo(updateLine);
-	    }
+	    matched = matched.slice(0, -1); // remove trailing dimension from match
+	  } else {
+	    dim = m[1] || m[5];
+	  } // if unrecognized dimension
 
-	    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);
-	      }
 
-	      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 (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
-	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-	        continueTo(finishDragEndpoint);
-	      }
-	    });
+	  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;
+	  return {
+	    val: (Math.abs(deg) + min + sec) * sign,
+	    dim: dim,
+	    matched: matched,
+	    remain: input.slice(matched.length)
+	  };
+	}
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      nextStep();
-	    }
+	function pair(input, dims) {
+	  input = input.trim();
+	  var one = search(input, dims);
+	  if (!one) return null;
+	  input = one.remain.trim();
+	  var two = search(input, dims);
+	  if (!two || two.remain) return null;
+
+	  if (one.dim) {
+	    return swapdim(one.val, two.val, one.dim);
+	  } else {
+	    return [one.val, two.val];
 	  }
+	}
 
-	  function finishDragEndpoint() {
-	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	      return continueTo(updateLine);
+	function swapdim(a, b, dim) {
+	  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');
+	    header.append('h2').call(_t.append('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();
 	    }
 
-	    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 keydown(d3_event) {
+	      if (d3_event.keyCode === 27) {
+	        // escape
+	        search.node().blur();
 	      }
+	    }
 
-	      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);
+	    function keypress(d3_event) {
+	      var q = search.property('value'),
+	          items = list.selectAll('.feature-list-item');
 
-	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-	        continueTo(startDragEndpoint);
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      q.length && items.size()) {
+	        click(d3_event, items.datum());
 	      }
-	    });
-	    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 startDragMidpoint() {
-	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	      return continueTo(updateLine);
+	    function inputevent() {
+	      _geocodeResults = undefined;
+	      drawList();
 	    }
 
-	    if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-	      context.enter(modeSelect(context, [woodRoadID]));
+	    function clearSearch() {
+	      search.property('value', '');
+	      drawList();
 	    }
 
-	    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);
+	    function mapDrawn(e) {
+	      if (e.full) {
+	        drawList();
 	      }
+	    }
 
-	      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 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*)$/);
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	      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 continueDragMidpoint() {
-	    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;
+	      var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
-	    var advance = function advance() {
-	      context.history().checkpoint('doneUpdateLine');
-	      continueTo(deleteLines);
-	    };
+	      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
+	        });
+	      }
 
-	    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);
+	      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;
 	      }
 
-	      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
+	      localResults = localResults.sort(function byDistance(a, b) {
+	        return a.distance - b.distance;
 	      });
-	    });
+	      result = result.concat(localResults);
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      nextStep();
-	    }
-	  }
+	      (_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
+	          };
 
-	  function deleteLines() {
-	    context.history().reset('doneUpdateLine');
-	    context.enter(modeBrowse(context));
+	          if (d.osm_type === 'way') {
+	            // for ways, add some fake closed nodes
+	            attrs.nodes = ['a', 'a']; // so that geometry area is possible
+	          }
 
-	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-	      return chapter.restart();
-	    }
+	          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])])
+	          });
+	        }
+	      });
 
-	    var msec = transitionTime(deleteLinesLoc, context.map().center());
+	      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
+	        });
+	      }
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
+	      return result;
 	    }
 
-	    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 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('').call(_t.append('geocoder.no_results_worldwide'));
 
-	      var advance = function advance() {
-	        continueTo(rightClickIntersection);
-	      };
+	      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').call(_t.append('geocoder.search'));
+	      }
 
-	      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)
+	      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;
 	      });
-	    }, msec + 100);
-
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
-	  }
-
-	  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
-	        });
+	      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'));
 	      });
-	      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
+	      label.append('span').attr('class', 'entity-type').text(function (d) {
+	        return d.type;
 	      });
-	      context.history().on('change.intro', function () {
-	        timeout(function () {
-	          continueTo(deleteLines);
-	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      label.append('span').attr('class', 'entity-name').text(function (d) {
+	        return d.name;
 	      });
-	    }, 600);
-
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
+	      enter.style('opacity', 0).transition().style('opacity', 1);
+	      items.order();
+	      items.exit().remove();
 	    }
-	  }
 
-	  function splitIntersection() {
-	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-	      return continueTo(deleteLines);
+	    function mouseover(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], true, context);
 	    }
 
-	    var node = selectMenuItem(context, 'split').node();
-
-	    if (!node) {
-	      return continueTo(rightClickIntersection);
+	    function mouseout(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], false, context);
 	    }
 
-	    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();
+	    function click(d3_event, d) {
+	      d3_event.preventDefault();
 
-	      if (!wasChanged && !node) {
-	        return continueTo(rightClickIntersection);
+	      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);
 	      }
+	    }
 
-	      reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
-	        street: _t('intro.graph.name.washington-street')
-	      }), {
-	        duration: 0,
-	        padding: 50
+	    function geocoderSearch() {
+	      services.geocoder.search(search.property('value'), function (err, resp) {
+	        _geocodeResults = resp || [];
+	        drawList();
 	      });
-	    });
-	    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)
-	    });
-
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
 	    }
 	  }
 
-	  function retrySplit() {
-	    context.enter(modeBrowse(context));
-	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	  return featureList;
+	}
 
-	    var advance = function advance() {
-	      continueTo(rightClickIntersection);
-	    };
+	function uiImproveOsmComments() {
+	  var _qaItem;
 
-	    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 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
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      nextStep();
-	    }
-	  }
+	    services.improveOSM.getComments(_qaItem).then(function (d) {
+	      if (!d.comments) return; // nothing to do here
 
-	  function didSplit() {
-	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-	      return continueTo(rightClickIntersection);
-	    }
+	      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 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
+	        if (osm && d.username) {
+	          selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
+	        }
+
+	        selection.text(function (d) {
+	          return d.username;
 	        });
 	      });
-	    }, 600); // after initial reveal and curtain cut
+	      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').text(function (d) {
+	        return d.text;
+	      });
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
-	    context.on('enter.intro', function () {
-	      var ids = context.selectedIDs();
+	  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 (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);
-	      }
-	    });
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
+
+	  issueComments.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return issueComments;
+	  };
+
+	  return issueComments;
+	}
+
+	function uiImproveOsmDetails(context) {
+	  var _qaItem;
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
+	  function issueDetail(d) {
+	    if (d.desc) return d.desc;
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = {
+	      html: _t.html('inspector.unknown')
+	    }; // special key `default` works as a fallback string
+
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
 	  }
 
-	  function multiSelect() {
-	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-	      return continueTo(rightClickIntersection);
-	    }
+	  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 ids = context.selectedIDs();
-	    var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-	    var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').call(_t.append('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-	    if (hasWashington && hasTwelfth) {
-	      return continueTo(multiRightClick);
-	    } else if (!hasWashington && !hasTwelfth) {
-	      return continueTo(didSplit);
-	    }
+	    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
 
-	    context.map().centerZoomEase(twelfthAvenue, 18, 500);
-	    timeout(function () {
-	      var selected, other, padding, box;
+	      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 (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 (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
+	        }
 
-	      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;
+	        context.map().centerZoom(_qaItem.loc, 20);
+
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
 	        } 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;
+	          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)
 
-	        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);
+	      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
 	        }
-	      });
-	    }, 600);
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
+	        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
 	  }
 
-	  function multiRightClick() {
-	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-	      return continueTo(rightClickIntersection);
-	    }
+	  improveOsmDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmDetails;
+	  };
 
-	    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();
+	  return improveOsmDetails;
+	}
 
-	        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 uiImproveOsmHeader() {
+	  var _qaItem;
 
-	    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 issueTitle(d) {
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = {
+	      html: _t.html('inspector.unknown')
+	    }; // special key `default` works as a fallback string
 
-	  function multiDelete() {
-	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-	      return continueTo(rightClickIntersection);
-	    }
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+	  }
 
-	    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
-	      });
+	  function improveOsmHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
 	    });
-	    context.on('exit.intro', function () {
-	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	        return continueTo(multiSelect); // left select mode but roads still exist
-	      }
+	    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);
 	    });
-	    context.history().on('change.intro', function () {
-	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	        continueTo(retryDelete); // changed something but roads still exist
+	    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 {
-	        continueTo(play);
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
 	      }
 	    });
-
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('exit.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
 	  }
 
-	  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);
-	      }
-	    });
+	  improveOsmHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmHeader;
+	  };
 
-	    function continueTo(nextStep) {
-	      nextStep();
-	    }
-	  }
+	  return improveOsmHeader;
+	}
 
-	  function play() {
-	    dispatch$1.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 uiImproveOsmEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiImproveOsmDetails(context);
+	  var qaComments = uiImproveOsmComments();
+	  var qaHeader = uiImproveOsmHeader();
 
-	  chapter.enter = function () {
-	    addLine();
-	  };
+	  var _qaItem;
 
-	  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 improveOsmEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('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);
+	  }
 
-	  chapter.restart = function () {
-	    chapter.exit();
-	    chapter.enter();
-	  };
+	  function improveOsmSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	  return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    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 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'
-	  };
+	    saveSection.exit().remove(); // enter
 
-	  function timeout(f, t) {
-	    timeouts.push(window.setTimeout(f, t));
-	  }
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').call(_t.append('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 eventCancel(d3_event) {
-	    d3_event.stopPropagation();
-	    d3_event.preventDefault();
-	  }
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	  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 changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
-	  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);
-	  }
+	      if (val === '') {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	  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
+	      _qaItem = _qaItem.update({
+	        newComment: val
 	      });
-	    }
+	      var qaService = services.improveOSM;
 
-	    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);
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem);
+	      }
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      nextStep();
+	      saveSection.call(qaSaveButtons);
 	    }
 	  }
 
-	  function startHouse() {
-	    if (context.mode().id !== 'add-area') {
-	      return continueTo(addHouse);
-	    }
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    _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
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	    buttonSection.exit().remove(); // enter
 
-	  function continueHouse() {
-	    if (context.mode().id !== 'draw-area') {
-	      return continueTo(addHouse);
-	    }
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	    _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
-	      });
+	    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
+
+	      var qaService = services.improveOSM;
+
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
 	    });
-	    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);
+	    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
+
+	      var qaService = services.improveOSM;
+
+	      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
 
-	        if (isMostlySquare(points)) {
-	          _houseID = way.id;
-	          return continueTo(chooseCategoryBuilding);
-	        } else {
-	          return continueTo(retryHouse);
-	        }
-	      } else {
-	        return chapter.restart();
+	      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 continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
 
-	  function retryHouse() {
-	    var onClick = function onClick() {
-	      continueTo(addHouse);
-	    };
+	  improveOsmEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmEditor;
+	  };
 
-	    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
-	      });
-	    });
+	  return utilRebind(improveOsmEditor, 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('h2').call(_t.append('inspector.choose'));
+	    var direction = _mainLocalizer.textDirection() === 'rtl' ? 'backward' : 'forward';
+	    messagewrap.append('button').attr('class', 'preset-choose').attr('title', direction).on('click', function () {
+	      dispatch.call('cancel', this);
+	    }).call(svgIcon("#iD-icon-".concat(direction)));
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      nextStep();
+	    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 chooseCategoryBuilding() {
-	    if (!_houseID || !context.hasEntity(_houseID)) {
-	      return addHouse();
-	    }
+	    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
 
-	    var ids = context.selectedIDs();
+	        var buttons = list.selectAll('.preset-list-button');
+	        if (!buttons.empty()) buttons.nodes()[0].focus();
+	      }
+	    }
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	      context.enter(modeSelect(context, [_houseID]));
-	    } // disallow scrolling
+	    function keypress(d3_event) {
+	      // enter
+	      var value = search.property('value');
 
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      value.length) {
+	        list.selectAll('.preset-list-item:first-child').each(function (d) {
+	          d.choose.call(this);
+	        });
+	      }
+	    }
 
-	    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..
+	    function inputevent() {
+	      var value = search.property('value');
+	      list.classed('filtered', value.length);
+	      var results, messageText;
 
-	    context.on('enter.intro', function (mode) {
-	      if (!_houseID || !context.hasEntity(_houseID)) {
-	        return continueTo(addHouse);
+	      if (value.length) {
+	        results = presets.search(value, entityGeometries()[0], _currLoc);
+	        messageText = _t.html('inspector.results', {
+	          n: results.collection.length,
+	          search: value
+	        });
+	      } else {
+	        results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+	        messageText = _t.html('inspector.choose');
 	      }
 
-	      var ids = context.selectedIDs();
+	      list.call(drawList, results);
+	      message.html(messageText);
+	    }
 
-	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	        return continueTo(chooseCategoryBuilding);
-	      }
-	    });
+	    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 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 (_autofocus) {
+	      search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+	      // so try again on the next pass
+
+	      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);
 	  }
 
-	  function choosePresetHouse() {
-	    if (!_houseID || !context.hasEntity(_houseID)) {
-	      return addHouse();
-	    }
+	  function drawList(list, presets) {
+	    presets = presets.matchAllGeometry(entityGeometries());
+	    var collection = presets.collection.reduce(function (collection, preset) {
+	      if (!preset) return collection;
 
-	    var ids = context.selectedIDs();
+	      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));
+	      }
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	      context.enter(modeSelect(context, [_houseID]));
-	    } // disallow scrolling
+	      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
 
-	    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..
+	    if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the next item in the list at the same level
 
-	    context.on('enter.intro', function (mode) {
-	      if (!_houseID || !context.hasEntity(_houseID)) {
-	        return continueTo(addHouse);
-	      }
+	      var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
 
-	      var ids = context.selectedIDs();
+	      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
 
-	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	        return continueTo(chooseCategoryBuilding);
+	      } else if (select(this).classed('expanded')) {
+	        // select the first subitem instead
+	        nextItem = item.select('.subgrid .preset-list-item:first-child');
 	      }
-	    });
 
-	    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 closeEditorHouse() {
-	    if (!_houseID || !context.hasEntity(_houseID)) {
-	      return addHouse();
-	    }
+	      if (!nextItem.empty()) {
+	        // focus on the next item
+	        nextItem.select('.preset-list-button').node().focus();
+	      } // arrow up, move focus to the previous, higher item
 
-	    var ids = context.selectedIDs();
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the previous item in the list at the same level
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	      context.enter(modeSelect(context, [_houseID]));
-	    }
+	      var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
 
-	    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);
+	      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
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
-	    }
-	  }
+	      } 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');
+	      }
 
-	  function rightClickHouse() {
-	    if (!_houseID) return chapter.restart();
-	    context.enter(modeBrowse(context));
-	    context.history().reset('hasHouse');
-	    var zoom = context.map().zoom();
+	      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
 
-	    if (zoom < 20) {
-	      zoom = 20;
-	    }
+	    } 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
 
-	    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);
-	    });
+	      if (!parentItem.empty()) {
+	        parentItem.select('.preset-list-button').node().focus();
+	      } // arrow right, choose this item
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      item.datum().choose.call(select(this).node());
 	    }
 	  }
 
-	  function clickSquare() {
-	    if (!_houseID) return chapter.restart();
-	    var entity = context.hasEntity(_houseID);
-	    if (!entity) return continueTo(rightClickHouse);
-	    var node = selectMenuItem(context, 'orthogonalize').node();
+	  function CategoryItem(preset) {
+	    var box,
+	        sublist,
+	        shown = false;
 
-	    if (!node) {
-	      return continueTo(rightClickHouse);
-	    }
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-	    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);
+	      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).attr('title', !isExpanded ? _t('icons.collapse') : _t('icons.expand'));
+	        select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
+	        item.choose();
 	      }
-	    });
-	    context.map().on('move.intro', function () {
-	      var node = selectMenuItem(context, 'orthogonalize').node();
 
-	      if (!wasChanged && !node) {
-	        return continueTo(rightClickHouse);
-	      }
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').attr('title', _t('icons.expand')).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
 
-	      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.
+	          if (!select(this).classed('expanded')) {
+	            // toggle expansion (expand the item)
+	            click.call(this, d3_event);
+	          } // left arrow, collapse the focused item
 
-	      timeout(function () {
-	        if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
-	          n: 1
-	        })) {
-	          continueTo(doneSquare);
+	        } 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 {
-	          continueTo(retryClickSquare);
+	          itemKeydown.call(this, d3_event);
 	        }
-	      }, 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();
+	      });
+	      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');
 	    }
-	  }
 
-	  function retryClickSquare() {
-	    context.enter(modeBrowse(context));
-	    revealHouse(house, helpHtml('intro.buildings.retry_square'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: function buttonCallback() {
-	        continueTo(rightClickHouse);
+	    item.choose = function () {
+	      if (!box || !sublist) return;
+
+	      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');
 	      }
-	    });
+	    };
 
-	    function continueTo(nextStep) {
-	      nextStep();
-	    }
+	    item.preset = preset;
+	    return item;
 	  }
 
-	  function doneSquare() {
-	    context.history().checkpoint('doneSquare');
-	    revealHouse(house, helpHtml('intro.buildings.done_square'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: function buttonCallback() {
-	        continueTo(addTank);
+	  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);
+	    }
+
+	    item.choose = function () {
+	      if (select(this).classed('disabled')) return;
+
+	      if (!context.inIntro()) {
+	        _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
 	      }
-	    });
 
-	    function continueTo(nextStep) {
-	      nextStep();
-	    }
-	  }
+	      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);
+	        }
 
-	  function addTank() {
-	    context.enter(modeBrowse(context));
-	    context.history().reset('doneSquare');
-	    _tankID = null;
-	    var msec = transitionTime(tank, context.map().center());
+	        return graph;
+	      }, _t('operations.change_tags.annotation'));
+	      context.validator().validate(); // rerun validation
 
-	    if (msec) {
-	      reveal(null, null, {
-	        duration: 0
-	      });
-	    }
+	      dispatch.call('choose', this, preset);
+	    };
 
-	    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);
+	    item.help = function (d3_event) {
+	      d3_event.stopPropagation();
+	      item.reference.toggle();
+	    };
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
+	    item.preset = preset;
+	    item.reference = uiTagReference(preset.reference());
+	    return item;
 	  }
 
-	  function startTank() {
-	    if (context.mode().id !== 'add-area') {
-	      return continueTo(addTank);
-	    }
+	  function updateForFeatureHiddenState() {
+	    if (!_entityIDs.every(context.hasEntity)) return;
+	    var geometries = entityGeometries();
+	    var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
 
-	    _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
+	    button.call(uiTooltip().destroyAny);
+	    button.each(function (item, index) {
+	      var hiddenPresetFeaturesId;
 
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
-	  }
+	      for (var i in geometries) {
+	        hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+	        if (hiddenPresetFeaturesId) break;
+	      }
 
-	  function continueTank() {
-	    if (context.mode().id !== 'draw-area') {
-	      return continueTo(addTank);
-	    }
+	      var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+	      select(this).classed('disabled', isHiddenPreset);
 
-	    _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 (isHiddenPreset) {
+	        var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
+	        select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+	          features: {
+	            html: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+	          }
+	        })).placement(index < 2 ? 'bottom' : 'top'));
 	      }
 	    });
-
-	    function continueTo(nextStep) {
-	      context.map().on('move.intro drawn.intro', null);
-	      context.on('enter.intro', null);
-	      nextStep();
-	    }
 	  }
 
-	  function searchPresetTank() {
-	    if (!_tankID || !context.hasEntity(_tankID)) {
-	      return addTank();
-	    }
-
-	    var ids = context.selectedIDs();
+	  presetList.autofocus = function (val) {
+	    if (!arguments.length) return _autofocus;
+	    _autofocus = val;
+	    return presetList;
+	  };
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	      context.enter(modeSelect(context, [_tankID]));
-	    } // disallow scrolling
+	  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());
 
-	    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..
+	      _currLoc = extent.center(); // match presets
 
-	    context.on('enter.intro', function (mode) {
-	      if (!_tankID || !context.hasEntity(_tankID)) {
-	        return continueTo(addTank);
-	      }
+	      var presets = _entityIDs.map(function (entityID) {
+	        return _mainPresetIndex.match(context.entity(entityID), context.graph());
+	      });
 
-	      var ids = context.selectedIDs();
+	      presetList.presets(presets);
+	    }
 
-	      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..
+	    return presetList;
+	  };
 
-	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+	  presetList.presets = function (val) {
+	    if (!arguments.length) return _currentPresets;
+	    _currentPresets = val;
+	    return presetList;
+	  };
 
-	        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);
-	      }
-	    });
+	  function entityGeometries() {
+	    var counts = {};
 
-	    function checkPresetSearch() {
-	      var first = context.container().select('.preset-list-item:first-child');
+	    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 (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.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
-	        context.history().on('change.intro', function () {
-	          continueTo(closeEditorTank);
-	        });
+	      if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+	        geometry = 'point';
 	      }
-	    }
 
-	    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 (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
 	    }
+
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
 	  }
 
-	  function closeEditorTank() {
-	    if (!_tankID || !context.hasEntity(_tankID)) {
-	      return addTank();
-	    }
+	  return utilRebind(presetList, dispatch, 'on');
+	}
 
-	    var ids = context.selectedIDs();
+	function uiViewOnOSM(context) {
+	  var _what; // an osmEntity or osmNote
 
-	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	      context.enter(modeSelect(context, [_tankID]));
-	    }
 
-	    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);
+	  function viewOnOSM(selection) {
+	    var url;
 
-	    function continueTo(nextStep) {
-	      context.on('exit.intro', null);
-	      nextStep();
+	    if (_what instanceof osmEntity) {
+	      url = context.connection().entityURL(_what);
+	    } else if (_what instanceof osmNote) {
+	      url = context.connection().noteURL(_what);
 	    }
-	  }
-
-	  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);
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      context.map().on('move.intro drawn.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
-	  }
+	    var data = !_what || _what.isNew() ? [] : [_what];
+	    var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	  function clickCircle() {
-	    if (!_tankID) return chapter.restart();
-	    var entity = context.hasEntity(_tankID);
-	    if (!entity) return continueTo(rightClickTank);
-	    var node = selectMenuItem(context, 'circularize').node();
+	    link.exit().remove(); // enter
 
-	    if (!node) {
-	      return continueTo(rightClickTank);
-	    }
+	    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').call(_t.append('inspector.view_on_osm'));
+	  }
 
-	    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();
+	  viewOnOSM.what = function (_) {
+	    if (!arguments.length) return _what;
+	    _what = _;
+	    return viewOnOSM;
+	  };
 
-	      if (!wasChanged && !node) {
-	        return continueTo(rightClickTank);
-	      }
+	  return viewOnOSM;
+	}
 
-	      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 uiInspector(context) {
+	  var presetList = uiPresetList(context);
+	  var entityEditor = uiEntityEditor(context);
+	  var wrap = select(null),
+	      presetPane = select(null),
+	      editorPane = select(null);
+	  var _state = 'select';
 
-	      timeout(function () {
-	        if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
-	          n: 1
-	        })) {
-	          continueTo(play);
-	        } else {
-	          continueTo(retryClickCircle);
-	        }
-	      }, 500); // after transitioned actions
-	    });
+	  var _entityIDs;
 
-	    function continueTo(nextStep) {
-	      context.on('enter.intro', null);
-	      context.map().on('move.intro', null);
-	      context.history().on('change.intro', null);
-	      nextStep();
-	    }
-	  }
+	  var _newFeature = false;
 
-	  function retryClickCircle() {
-	    context.enter(modeBrowse(context));
-	    revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: function buttonCallback() {
-	        continueTo(rightClickTank);
-	      }
+	  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');
 
-	    function continueTo(nextStep) {
-	      nextStep();
-	    }
-	  }
+	    function shouldDefaultToPresetList() {
+	      // always show the inspector on hover
+	      if (_state !== 'select') return false; // can only change preset on single selection
 
-	  function play() {
-	    dispatch$1.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');
-	      }
-	    });
-	  }
+	      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
 
-	  chapter.enter = function () {
-	    addHouse();
-	  };
+	      if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
 
-	  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 (_newFeature) return true; // all existing features except vertices should default to inspector
 
-	  chapter.restart = function () {
-	    chapter.exit();
-	    chapter.enter();
-	  };
+	      if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
 
-	  return utilRebind(chapter, dispatch$1, 'on');
-	}
+	      if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-	function uiIntroStartEditing(context, reveal) {
-	  var dispatch$1 = dispatch('done', 'startEditing');
-	  var modalSelection = select(null);
-	  var chapter = {
-	    title: 'intro.startediting.title'
-	  };
+	      if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
 
-	  function showHelp() {
-	    reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: function buttonCallback() {
-	        shortcuts();
-	      }
-	    });
-	  }
+	      if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
 
-	  function shortcuts() {
-	    reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: function buttonCallback() {
-	        showSave();
-	      }
-	    });
-	  }
+	      return true;
+	    }
 
-	  function showSave() {
-	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	    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);
+	    }
 
-	    reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
-	      buttonText: _t.html('intro.ok'),
-	      buttonCallback: function buttonCallback() {
-	        showStart();
-	      }
-	    });
+	    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])));
 	  }
 
-	  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();
+	  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);
 	    });
-	    startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
-	    startbutton.append('h2').html(_t.html('intro.startediting.start'));
-	    dispatch$1.call('startEditing');
-	  }
 
-	  chapter.enter = function () {
-	    showHelp();
-	  };
+	    if (presets) {
+	      presetList.presets(presets);
+	    }
 
-	  chapter.exit = function () {
-	    modalSelection.remove();
-	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	    presetPane.call(presetList.autofocus(true));
 	  };
 
-	  return utilRebind(chapter, dispatch$1, 'on');
-	}
-
-	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;
+	  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);
+	      });
 
-	  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 (preset) {
+	        entityEditor.presets([preset]);
 	      }
 
-	      selection.call(startIntro);
-	    })["catch"](function () {
-	      /* ignore */
-	    });
-	  }
+	      editorPane.call(entityEditor);
+	    }
+	  };
 
-	  function startIntro(selection) {
-	    context.enter(modeBrowse(context)); // Save current map state
+	  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
 
-	    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.container().selectAll('.field-help-body').remove();
+	    return inspector;
+	  };
 
-	    context.ui().sidebar.expand();
-	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
+	  inspector.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return inspector;
+	  };
 
-	    context.inIntro(true); // Load semi-real data used in intro
+	  inspector.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return inspector;
+	  };
 
-	    if (osm) {
-	      osm.toggle(false).reset();
-	    }
+	  return inspector;
+	}
 
-	    context.history().reset();
-	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-	    context.history().checkpoint('initial'); // Setup imagery
+	function uiKeepRightDetails(context) {
+	  var _qaItem;
 
-	    var imagery = context.background().findSource(INTRO_IMAGERY);
+	  function issueDetail(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = {
+	      html: _t.html('inspector.unknown')
+	    };
+	    var replacements = d.replacements || {};
+	    replacements["default"] = unknown; // special key `default` works as a fallback string
 
-	    if (imagery) {
-	      context.background().baseLayerSource(imagery);
-	    } else {
-	      context.background().bing();
+	    var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
+
+	    if (detail === unknown.html) {
+	      detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
 	    }
 
-	    overlays.forEach(function (d) {
-	      return context.background().toggleOverlayLayer(d);
-	    }); // Setup data layers (only OSM)
+	    return detail;
+	  }
 
-	    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 keepRightDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
 	    });
-	    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..
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-	    corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').call(_t.append('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 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);
+	    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
 
-	        if (i < chapterFlow.length - 1) {
-	          var next = chapterFlow[i + 1];
-	          context.container().select("button.chapter-".concat(next)).classed('next', true);
-	        } // Store walkthrough progress..
+	      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);
+	        }
 
-	        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..
+	        context.map().centerZoomEase(_qaItem.loc, 20);
 
-	      var incomplete = utilArrayDifference(chapterFlow, progress);
+	        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)
 
-	      if (!incomplete.length) {
-	        corePreferences('walkthrough_completed', 'yes');
-	      }
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	      curtain.remove();
-	      navwrap.remove();
-	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	        }
 
-	      if (osm) {
-	        osm.toggle(true).reset().caches(caches);
+	        if (name) {
+	          this.innerText = name;
+	        }
 	      }
+	    }); // Don't hide entities related to this issue - #5880
 
-	      context.history().reset().merge(Object.values(baseEntities));
-	      context.background().baseLayerSource(background);
-	      overlays.forEach(function (d) {
-	        return context.background().toggleOverlayLayer(d);
-	      });
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	      if (history) {
-	        context.history().fromJSON(history, false);
-	      }
+	  keepRightDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightDetails;
+	  };
 
-	      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]);
+	  return keepRightDetails;
+	}
 
-	    function enterChapter(d3_event, newChapter) {
-	      if (_currChapter) {
-	        _currChapter.exit();
-	      }
+	function uiKeepRightHeader() {
+	  var _qaItem;
 
-	      context.enter(modeBrowse(context));
-	      _currChapter = newChapter;
+	  function issueTitle(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = _t.html('inspector.unknown');
+	    var replacements = d.replacements || {};
+	    replacements["default"] = {
+	      html: unknown
+	    }; // special key `default` works as a fallback string
 
-	      _currChapter.enter();
+	    var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
 
-	      buttons.classed('next', false).classed('active', function (d) {
-	        return d.title === _currChapter.title;
-	      });
+	    if (title !== unknown) {
+	      return _t.apply("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+	    } else {
+	      return _t.apply("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
 	    }
 	  }
 
-	  return intro;
-	}
+	  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);
+	  }
 
-	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'
+	  keepRightHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightHeader;
 	  };
 
-	  function update(selection) {
-	    var shownItems = [];
-	    var liveIssues = context.validator().getIssues({
-	      what: corePreferences('validate-what') || 'edited',
-	      where: corePreferences('validate-where') || 'all'
-	    });
+	  return keepRightHeader;
+	}
 
-	    if (liveIssues.length) {
-	      warningsItem.count = liveIssues.length;
-	      shownItems.push(warningsItem);
-	    }
+	function uiViewOnKeepRight() {
+	  var _qaItem;
 
-	    if (corePreferences('validate-what') === 'all') {
-	      var resolvedIssues = context.validator().getResolvedIssues();
+	  function viewOnKeepRight(selection) {
+	    var url;
 
-	      if (resolvedIssues.length) {
-	        resolvedItem.count = resolvedIssues.length;
-	        shownItems.push(resolvedItem);
-	      }
+	    if (services.keepRight && _qaItem instanceof QAItem) {
+	      url = services.keepRight.issueURL(_qaItem);
 	    }
 
-	    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
+	    var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
-	        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();
-	    });
+	    link.exit().remove(); // 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').call(_t.append('inspector.view_on_keepRight'));
 	  }
 
-	  return function (selection) {
-	    update(selection);
-	    context.validator().on('validated.infobox', function () {
-	      update(selection);
-	    });
+	  viewOnKeepRight.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnKeepRight;
 	  };
+
+	  return viewOnKeepRight;
 	}
 
-	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)
+	function uiKeepRightEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiKeepRightDetails(context);
+	  var qaHeader = uiKeepRightHeader();
 
-	    var _dMini; // dimensions of minimap
+	  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').attr('title', _t('icons.close')).on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('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));
+	  }
 
-	    var _cMini; // center pixel of minimap
+	  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 "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	    var _tStart; // transform at start of gesture
+	    saveSection.exit().remove(); // enter
 
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').call(_t.append('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 _tCurr; // transform at most recent event
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
-	    var _timeoutID;
+	      if (val === _qaItem.comment) {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	    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;
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.keepRight;
 
-	      if (!isZooming && !isPanning) {
-	        return; // no change
-	      } // lock in either zooming or panning, don't allow both in minimap.
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem); // update keepright cache
+	      }
 
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
-	      if (!_gesture) {
-	        _gesture = isZooming ? 'zoom' : 'pan';
-	      }
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	      var tMini = projection.transform();
-	      var tX, tY, scale;
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	      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;
-	      }
+	    buttonSection.exit().remove(); // enter
 
-	      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();
-	    }
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	    function zoomEnded() {
-	      if (_skipEvents) return;
-	      if (_gesture !== 'pan') return;
-	      updateProjection();
-	      _gesture = null;
-	      context.map().center(projection.invert(_cMini)); // recenter main map..
-	    }
+	    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
 
-	    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();
+	      var qaService = services.keepRight;
 
-	      if (_isTransformed) {
-	        utilSetTransform(tiles, 0, 0);
-	        utilSetTransform(viewport, 0, 0);
-	        _isTransformed = false;
+	      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
 
-	      zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
-	      _skipEvents = true;
-	      wrap.call(zoom.transform, _tCurr);
-	      _skipEvents = false;
-	    }
+	      var qaService = services.keepRight;
 
-	    function redraw() {
-	      clearTimeout(_timeoutID);
-	      if (_isHidden) return;
-	      updateProjection();
-	      var zMini = geoScaleToZoom(projection.scale()); // setup tile container
+	      if (qaService) {
+	        d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-	      tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
-	      tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
+	        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
 
-	      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
+	      var qaService = services.keepRight;
 
-	      var overlaySources = context.background().overlayLayerSources();
-	      var activeOverlayLayers = [];
+	      if (qaService) {
+	        d.newStatus = 'ignore'; // ignore permanently (false positive)
 
-	      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));
-	        }
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
 	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	      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;
-	        });
-	      }
+	  keepRightEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightEditor;
+	  };
+
+	  return utilRebind(keepRightEditor, dispatch, 'on');
+	}
+
+	function uiLasso(context) {
+	  var group, polygon;
+	  lasso.coordinates = [];
+
+	  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));
+	  }
+
+	  function draw() {
+	    if (polygon) {
+	      polygon.data([lasso.coordinates]).attr('d', function (d) {
+	        return 'M' + d.join(' L') + ' Z';
+	      });
 	    }
+	  }
 
-	    function queueRedraw() {
-	      clearTimeout(_timeoutID);
-	      _timeoutID = setTimeout(function () {
-	        redraw();
-	      }, 750);
+	  lasso.extent = function () {
+	    return lasso.coordinates.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	  };
+
+	  lasso.p = function (_) {
+	    if (!arguments.length) return lasso;
+	    lasso.coordinates.push(_);
+	    draw();
+	    return lasso;
+	  };
+
+	  lasso.close = function () {
+	    if (group) {
+	      group.call(uiToggle(false, function () {
+	        select(this).remove();
+	      }));
 	    }
 
-	    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);
+	    context.container().classed('lasso', false);
+	  };
 
-	      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');
-	        });
+	  return lasso;
+	}
+
+	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;
+
+	      if (osm && d.user) {
+	        selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+	      }
+
+	      if (d.user) {
+	        selection.text(d.user);
 	      } else {
-	        wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
-	          redraw();
-	        });
+	        selection.call(_t.append('note.anonymous'));
 	      }
-	    }
+	    });
+	    metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	      return _t.html('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);
+	  }
 
-	    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 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
 
-	    _dMini = [200, 150]; //utilGetDimensions(wrap);
+	    _note.comments.forEach(function (d) {
+	      if (d.uid) uids[d.uid] = true;
+	    });
 
-	    _cMini = geoVecScale(_dMini, 0.5);
-	    context.map().on('drawn.map-in-map', function (drawn) {
-	      if (drawn.full === true) {
-	        redraw();
-	      }
+	    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);
+	      });
 	    });
-	    redraw();
-	    context.keybinding().on(_t('background.minimap.key'), toggle);
 	  }
 
-	  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 localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
+	    };
+	    s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
-	    function disableTooHigh() {
-	      var canEdit = context.map().zoom() >= context.minEditableZoom();
-	      div.style('display', canEdit ? 'none' : 'block');
-	    }
+	    var d = new Date(s);
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	    context.map().on('move.notice', debounce(disableTooHigh, 500));
-	    disableTooHigh();
+	  noteComments.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteComments;
 	  };
-	}
 
-	function uiPhotoviewer(context) {
-	  var dispatch$1 = dispatch('resize');
+	  return noteComments;
+	}
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	function uiNoteHeader() {
+	  var _note;
 
-	  function photoviewer(selection) {
-	    selection.append('button').attr('class', 'thumb-hide').on('click', function () {
-	      if (services.streetside) {
-	        services.streetside.hideViewer(context);
-	      }
+	  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 (services.mapillary) {
-	        services.mapillary.hideViewer(context);
+	      if (d.id < 0) {
+	        statusIcon = '#iD-icon-plus';
+	      } else if (d.status === 'open') {
+	        statusIcon = '#iD-icon-close';
+	      } else {
+	        statusIcon = '#iD-icon-apply';
 	      }
 
-	      if (services.openstreetcam) {
-	        services.openstreetcam.hideViewer(context);
+	      iconEnter.append('div').attr('class', 'note-icon-annotation').attr('title', _t('icons.close')).call(svgIcon(statusIcon, 'icon-annotation'));
+	    });
+	    headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
+	      if (_note.isNew()) {
+	        return _t.html('note.new');
 	      }
-	    }).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$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
-	    }));
-
-	    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');
-	        }
+	      return _t.html('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t.html('note.closed') : '');
+	    });
+	  }
 
-	        if (resizeOnY) {
-	          var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+	  noteHeader.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteHeader;
+	  };
 
-	          var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
-	          target.style('height', newHeight + 'px');
-	        }
+	  return noteHeader;
+	}
 
-	        dispatch.call(eventName, target, utilGetDimensions(target, true));
-	      }
+	function uiNoteReport() {
+	  var _note;
 
-	      function clamp(num, min, max) {
-	        return Math.max(min, Math.min(num, max));
-	      }
+	  function noteReport(selection) {
+	    var url;
 
-	      function stopResize(d3_event) {
-	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-	        d3_event.preventDefault();
-	        d3_event.stopPropagation(); // remove all the listeners we added
+	    if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+	      url = services.osm.noteReportURL(_note);
+	    }
 
-	        select(window).on('.' + eventName, null);
-	      }
+	    var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
-	      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);
+	    link.exit().remove(); // enter
 
-	        if (_pointerPrefix === 'pointer') {
-	          select(window).on('pointercancel.' + eventName, stopResize, false);
-	        }
-	      };
-	    }
+	    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').call(_t.append('note.report'));
 	  }
 
-	  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)];
-	      photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
-	      dispatch$1.call('resize', photoviewer, setPhotoDimensions);
-	    }
+	  noteReport.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteReport;
 	  };
 
-	  return utilRebind(photoviewer, dispatch$1, 'on');
+	  return noteReport;
 	}
 
-	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();
-	  };
-	}
+	function uiNoteEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var noteComments = uiNoteComments();
+	  var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-	function uiScale(context) {
-	  var projection = context.projection,
-	      isImperial = !_mainLocalizer.usesMetric(),
-	      maxLength = 180,
-	      tickHeight = 8;
+	  var _note;
 
-	  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 _newNote; // var _fieldsArr;
 
-	    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
 
+	  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').attr('title', _t('icons.close')).on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('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
 
-	    for (i = 0; i < buckets.length; i++) {
-	      val = buckets[i];
+	    var osm = services.osm;
 
-	      if (dist >= val) {
-	        scale.dist = Math.floor(dist / val) * val;
-	        break;
-	      } else {
-	        scale.dist = +dist.toFixed(2);
-	      }
+	    if (osm) {
+	      osm.on('change.note-save', function () {
+	        selection.call(noteEditor);
+	      });
 	    }
-
-	    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;
-	  }
-
-	  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);
 	  }
 
-	  return function (selection) {
-	    function switchUnits() {
-	      isImperial = !isImperial;
-	      selection.call(update);
-	    }
+	  function noteSaveSection(selection) {
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	    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);
-	    });
-	  };
-	}
+	    var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	function uiShortcuts(context) {
-	  var detected = utilDetect();
-	  var _activeTab = 0;
+	    noteSave.exit().remove(); // enter
 
-	  var _modalSelection;
+	    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 _selection = select(null);
+	    noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+	      return _note.isNew() ? _t.html('note.newDescription') : _t.html('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);
 
-	  function shortcutsModal(_modalSelection) {
-	    _modalSelection.select('.modal').classed('modal-shortcuts', true);
+	    if (!commentTextarea.empty() && _newNote) {
+	      // autofocus the comment field for new notes
+	      commentTextarea.node().focus();
+	    } // update
 
-	    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) {
-	      content.call(render, data);
-	    })["catch"](function () {
-	      /* ignore */
-	    });
-	  }
+	    noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-	  function render(selection, dataShortcuts) {
-	    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) {
+	    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();
-	      var i = tabs.nodes().indexOf(this);
-	      _activeTab = i;
-	      render(selection, dataShortcuts);
-	    });
-	    tabsEnter.append('span').html(function (d) {
-	      return _t.html(d.text);
-	    }); // Update
-
-	    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;
+	      select(this).on('keydown.note-input', null); // focus on button and submit
 
-	      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
+	      window.setTimeout(function () {
+	        if (_note.isNew()) {
+	          noteSave.selectAll('.save-button').node().focus();
+	          clickSave();
+	        } else {
+	          noteSave.selectAll('.comment-button').node().focus();
+	          clickComment();
+	        }
+	      }, 10);
+	    }
 
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
 
-	      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
-	        };
+	      _note = _note.update({
+	        newComment: val
 	      });
-	    }).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;
-	        });
-	      }
+	      var osm = services.osm;
 
-	      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);
+	      if (osm) {
+	        osm.replaceNote(_note); // update note cache
 	      }
-	    });
-	    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
 
-	    wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
-	      return i === _activeTab ? 'flex' : 'none';
-	    });
+	      noteSave.call(noteSaveButtons);
+	    }
 	  }
 
-	  return function (selection, show) {
-	    _selection = selection;
+	  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
 
-	    if (show) {
-	      _modalSelection = uiModal(selection);
+	    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').call(_t.append('note.login'));
+	    authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('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').call(_t.append('note.upload_explanation')).merge(prose);
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      var userLink = select(document.createElement('div'));
 
-	      _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();
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	            _modalSelection = null;
-	          }
-	        } else {
-	          _modalSelection = uiModal(_selection);
+	      userLink.append('a').attr('class', 'user-info').text(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('note.upload_explanation_with_user', {
+	        user: {
+	          html: userLink.html()
+	        }
+	      }));
+	    });
+	  }
 
-	          _modalSelection.call(shortcutsModal);
-	        }
-	      });
-	    }
-	  };
-	}
+	  function noteSaveButtons(selection) {
+	    var osm = services.osm;
+	    var hasAuth = osm && osm.authenticated();
 
-	var pair_1 = pair;
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	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
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	  var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
+	    buttonSection.exit().remove(); // enter
 
-	  var dim;
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-	  if (m[1] && m[5]) {
-	    // if matched both..
-	    dim = m[1]; // keep leading
+	    if (_note.isNew()) {
+	      buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+	      buttonEnter.append('button').attr('class', 'button save-button action').call(_t.append('note.save'));
+	    } else {
+	      buttonEnter.append('button').attr('class', 'button status-button action');
+	      buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('note.comment'));
+	    } // update
 
-	    matched = matched.slice(0, -1); // remove trailing dimension from match
-	  } else {
-	    dim = m[1] || m[5];
-	  } // if unrecognized dimension
 
+	    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.html('note.' + action + andComment);
+	    }).on('click.status', clickStatus);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
 
-	  if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
+	    function isSaveDisabled(d) {
+	      return hasAuth && d.status === 'open' && d.newComment ? null : true;
+	    }
+	  }
 
-	  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;
-	  return {
-	    val: (Math.abs(deg) + min + sec) * sign,
-	    dim: dim,
-	    matched: matched,
-	    remain: input.slice(matched.length)
-	  };
-	}
+	  function clickCancel(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	function pair(input, dims) {
-	  input = input.trim();
-	  var one = search(input, dims);
-	  if (!one) return null;
-	  input = one.remain.trim();
-	  var two = search(input, dims);
-	  if (!two || two.remain) return null;
+	    var osm = services.osm;
 
-	  if (one.dim) {
-	    return swapdim(one.val, two.val, one.dim);
-	  } else {
-	    return [one.val, two.val];
-	  }
-	}
+	    if (osm) {
+	      osm.removeNote(d);
+	    }
 
-	function swapdim(a, b, dim) {
-	  if (dim === 'N' || dim === 'S') return [a, b];
-	  if (dim === 'W' || dim === 'E') return [b, a];
-	}
+	    context.enter(modeBrowse(context));
+	    dispatch.call('change');
+	  }
 
-	function uiFeatureList(context) {
-	  var _geocodeResults;
+	  function clickSave(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	  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);
+	    var osm = services.osm;
 
-	    function focusSearch(d3_event) {
-	      var mode = context.mode() && context.mode().id;
-	      if (mode !== 'browse') return;
-	      d3_event.preventDefault();
-	      search.node().focus();
+	    if (osm) {
+	      osm.postNoteCreate(d, function (err, note) {
+	        dispatch.call('change', note);
+	      });
 	    }
+	  }
 
-	    function keydown(d3_event) {
-	      if (d3_event.keyCode === 27) {
-	        // escape
-	        search.node().blur();
-	      }
-	    }
+	  function clickStatus(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    function keypress(d3_event) {
-	      var q = search.property('value'),
-	          items = list.selectAll('.feature-list-item');
+	    var osm = services.osm;
 
-	      if (d3_event.keyCode === 13 && // ↩ Return
-	      q.length && items.size()) {
-	        click(items.datum());
-	      }
+	    if (osm) {
+	      var setStatus = d.status === 'open' ? 'closed' : 'open';
+	      osm.postNoteUpdate(d, setStatus, function (err, note) {
+	        dispatch.call('change', note);
+	      });
 	    }
+	  }
 
-	    function inputevent() {
-	      _geocodeResults = undefined;
-	      drawList();
-	    }
+	  function clickComment(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    function clearSearch() {
-	      search.property('value', '');
-	      drawList();
-	    }
+	    var osm = services.osm;
 
-	    function mapDrawn(e) {
-	      if (e.full) {
-	        drawList();
-	      }
+	    if (osm) {
+	      osm.postNoteUpdate(d, d.status, function (err, note) {
+	        dispatch.call('change', note);
+	      });
 	    }
+	  }
 
-	    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*)$/);
+	  noteEditor.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteEditor;
+	  };
 
-	      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
+	  noteEditor.newNote = function (val) {
+	    if (!arguments.length) return _newNote;
+	    _newNote = val;
+	    return noteEditor;
+	  };
 
+	  return utilRebind(noteEditor, dispatch, 'on');
+	}
 
-	      var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+	function uiSourceSwitch(context) {
+	  var keys;
 
-	      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(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
 
-	      var allEntities = graph.entities;
-	      var localResults = [];
+	    context.flush(); // remove stored data
 
-	      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;
-	      }
+	    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)
+	  }
 
-	      localResults = localResults.sort(function byDistance(a, b) {
-	        return a.distance - b.distance;
-	      });
-	      result = result.concat(localResults);
+	  var sourceSwitch = function sourceSwitch(selection) {
+	    selection.append('a').attr('href', '#').call(_t.append('source_switch.live')).attr('class', 'live chip').on('click', click);
+	  };
 
-	      (_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
-	          };
+	  sourceSwitch.keys = function (_) {
+	    if (!arguments.length) return keys;
+	    keys = _;
+	    return sourceSwitch;
+	  };
 
-	          if (d.osm_type === 'way') {
-	            // for ways, add some fake closed nodes
-	            attrs.nodes = ['a', 'a']; // so that geometry area is possible
-	          }
+	  return sourceSwitch;
+	}
 
-	          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])])
-	          });
-	        }
+	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);
+
+	    if (osm) {
+	      osm.on('loading.spinner', function () {
+	        img.transition().style('opacity', 1);
+	      }).on('loaded.spinner', function () {
+	        img.transition().style('opacity', 0);
 	      });
+	    }
+	  };
+	}
 
-	      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 uiSectionPrivacy(context) {
+	  var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-	      return result;
-	    }
+	  function renderDisclosureContent(selection) {
+	    // enter
+	    selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+	    var thirdPartyIconsEnter = selection.select('.privacy-options-list').selectAll('.privacy-third-party-icons-item').data([corePreferences('preferences.privacy.thirdpartyicons') || 'true']).enter().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, d) {
+	      d3_event.preventDefault();
+	      corePreferences('preferences.privacy.thirdpartyicons', d === 'true' ? 'false' : 'true');
+	    });
+	    thirdPartyIconsEnter.append('span').call(_t.append('preferences.privacy.third_party_icons.description')); // update
 
-	    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'));
+	    selection.selectAll('.privacy-third-party-icons-item').classed('active', function (d) {
+	      return d === 'true';
+	    }).select('input').property('checked', function (d) {
+	      return d === 'true';
+	    }); // Privacy Policy link
 
-	      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'));
-	      }
+	    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').call(_t.append('preferences.privacy.privacy_link'));
+	  }
 
-	      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();
-	    }
+	  corePreferences.onChange('preferences.privacy.thirdpartyicons', section.reRender);
+	  return section;
+	}
 
-	    function mouseover(d3_event, d) {
-	      if (d.id === -1) return;
-	      utilHighlightEntities([d.id], true, context);
-	    }
+	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 mouseout(d3_event, d) {
-	      if (d.id === -1) return;
-	      utilHighlightEntities([d.id], false, context);
+	    var updateMessage = '';
+	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+	    var showSplash = !corePreferences('sawSplash');
+
+	    if (sawPrivacyVersion !== context.privacyVersion) {
+	      updateMessage = _t('splash.privacy_update');
+	      showSplash = true;
 	    }
 
-	    function click(d3_event, d) {
-	      d3_event.preventDefault();
+	    if (!showSplash) return;
+	    corePreferences('sawSplash', true);
+	    corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-	      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);
+	    _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').call(_t.append('splash.welcome'));
+	    var modalSection = introModal.append('div').attr('class', 'modal-section');
+	    modalSection.append('p').html(_t.html('splash.text', {
+	      version: context.version,
+	      website: {
+	        html: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>'
+	      },
+	      github: {
+	        html: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
 	      }
-	    }
+	    }));
+	    modalSection.append('p').html(_t.html('splash.privacy', {
+	      updateMessage: updateMessage,
+	      privacyLink: {
+	        html: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
+	      }
+	    }));
+	    uiSectionPrivacy(context).label(_t.html('splash.privacy_settings')).render(modalSection);
+	    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').call(_t.append('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').call(_t.append('splash.start'));
+	    modalSelection.select('button.close').attr('class', 'hide');
+	  };
+	}
 
-	    function geocoderSearch() {
-	      services.geocoder.search(search.property('value'), function (err, resp) {
-	        _geocodeResults = resp || [];
-	        drawList();
-	      });
-	    }
-	  }
+	function uiStatus(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    if (!osm) return;
 
-	  return featureList;
-	}
+	    function update(err, apiStatus) {
+	      selection.html('');
 
-	function uiSectionEntityIssues(context) {
-	  var _entityIDs = [];
-	  var _issues = [];
+	      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.call(_t.append('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').call(_t.append('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
 
-	  var _activeIssueID;
+	            osm.reloadApiStatus();
+	          }, 2000); // eslint-disable-next-line no-warning-comments
+	          // TODO: nice messages for different error types
 
-	  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);
-	  });
 
-	  function reloadIssues() {
-	    _issues = context.validator().getSharedEntityIssues(_entityIDs, {
-	      includeDisabledRules: true
-	    });
-	  }
+	          selection.call(_t.append('osm_api_status.message.error', {
+	            suffix: ' '
+	          })).append('a').attr('href', '#') // let the user manually retry their connection directly
+	          .call(_t.append('osm_api_status.retry')).on('click.retry', function (d3_event) {
+	            d3_event.preventDefault();
+	            throttledRetry();
+	          });
+	        }
+	      } else if (apiStatus === 'readonly') {
+	        selection.call(_t.append('osm_api_status.message.readonly'));
+	      } else if (apiStatus === 'offline') {
+	        selection.call(_t.append('osm_api_status.message.offline'));
+	      }
 
-	  function makeActiveIssue(issueID) {
-	    _activeIssueID = issueID;
-	    section.selection().selectAll('.issue-container').classed('active', function (d) {
-	      return d.id === _activeIssueID;
-	    });
-	  }
+	      selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
+	    }
 
-	  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.id;
-	    }); // Exit
+	    osm.on('apiStatusChange.uiStatus', update);
+	    context.history().on('storage_error', function () {
+	      selection.selectAll('span.local-storage-full').remove();
+	      selection.append('span').attr('class', 'local-storage-full').call(_t.append('osm_api_status.message.local_storage_full'));
+	      selection.classed('error', true);
+	    }); // reload the status periodically regardless of other factors
 
-	    containers.exit().remove(); // Enter
+	    window.setInterval(function () {
+	      osm.reloadApiStatus();
+	    }, 90000); // load the initial status in case no OSM data was loaded yet
 
-	    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
+	    osm.reloadApiStatus();
+	  };
+	}
+
+	// for punction see https://stackoverflow.com/a/21224179
+
+	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());
+	}
+
+	// `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
+	//   }
+	//
+
+	function resolveStrings(item, defaults, localizerFn) {
+	  var itemStrings = Object.assign({}, item.strings); // shallow clone
 
-	      var extent = d.extent(context.graph());
+	  var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone
 
-	      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 anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings
 
-	      var container = select(this.parentNode.parentNode.parentNode);
-	      var info = container.selectAll('.issue-info');
-	      var isExpanded = info.classed('expanded');
+	  if (localizerFn) {
+	    if (itemStrings.community) {
+	      var communityID = simplify(itemStrings.community);
+	      itemStrings.community = localizerFn("_communities.".concat(communityID));
+	    }
 
-	      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);
-	        });
-	      }
+	    ['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));
 	    });
-	    itemsEnter.append('ul').attr('class', 'issue-fix-list');
-	    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).html(_t.html('inspector.no_documentation_key'));
-	      }
-	    }); // Update
+	  }
 
-	    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 replacements = {
+	    account: item.account,
+	    community: itemStrings.community,
+	    signupUrl: itemStrings.signupUrl,
+	    url: itemStrings.url
+	  }; // Resolve URLs first (which may refer to {account})
 
-	    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 (!replacements.signupUrl) {
+	    replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+	  }
 
-	      if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
-	      d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+	  if (!replacements.url) {
+	    replacements.url = resolve(itemStrings.url || defaultStrings.url);
+	  }
 
-	      utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
-	      new Promise(function (resolve, reject) {
-	        d.onClick(context, resolve, reject);
+	  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
 
-	        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';
+	  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;
 
-	      if (iconName.startsWith('maki')) {
-	        iconName += '-15';
-	      }
+	  function resolve(s, addLinks) {
+	    if (!s) return undefined;
+	    var result = s;
 
-	      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;
-	      }
+	    for (var key in replacements) {
+	      var token = "{".concat(key, "}");
+	      var regex = new RegExp(token, 'g');
 
-	      return null;
-	    });
-	  }
+	      if (regex.test(result)) {
+	        var replacement = replacements[key];
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
+	        if (!replacement) {
+	          throw new Error("Cannot resolve token: ".concat(token));
+	        } else {
+	          if (addLinks && (key === 'signupUrl' || key === 'url')) {
+	            replacement = linkify(replacement);
+	          }
 
-	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	      _entityIDs = val;
-	      _activeIssueID = null;
-	      reloadIssues();
-	    }
+	          result = result.replace(regex, replacement);
+	        }
+	      }
+	    } // There shouldn't be any leftover tokens in a resolved string
 
-	    return section;
-	  };
 
-	  return section;
-	}
+	    var leftovers = result.match(anyToken);
 
-	function uiPresetIcon() {
-	  var _preset;
+	    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 _geometry;
 
-	  var _sizeClass = 'medium';
+	    if (addLinks && item.type === 'reddit') {
+	      result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
+	        return linkify(resolved.url, match);
+	      });
+	    }
 
-	  function isSmall() {
-	    return _sizeClass === 'small';
+	    return result;
 	  }
 
-	  function presetIcon(selection) {
-	    selection.each(render);
+	  function linkify(url, text) {
+	    if (!url) return undefined;
+	    text = text || url;
+	    return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
 	  }
+	}
 
-	  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';
-	  }
+	var _oci = null;
+	function uiSuccess(context) {
+	  var MAXEVENTS = 2;
+	  var dispatch = dispatch$8('cancel');
 
-	  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;
-	    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);
-	  }
+	  var _changeset;
 
-	  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;
-	    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);
-	  }
+	  var _location;
 
-	  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 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 ".concat(w, " ").concat(h));
-	    ['fill', 'stroke'].forEach(function (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', "line 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);
+	  ensureOSMCommunityIndex(); // start fetching the data
+
+	  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
+
+	      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
 
-	    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);
-	      });
+
+	  function parseEventDate(when) {
+	    if (!when) return;
+	    var raw = when.trim();
+	    if (!raw) return;
+
+	    if (!/Z$/.test(raw)) {
+	      // if no trailing 'Z', add one
+	      raw += 'Z'; // this forces date to be parsed as a UTC date
 	    }
 
-	    fill = fillEnter.merge(fill);
-	    fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
-	    fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+	    var parsed = new Date(raw);
+	    return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
 	  }
 
-	  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 success(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h2').call(_t.append('success.just_edited'));
+	    header.append('button').attr('class', 'close').attr('title', _t('icons.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').call(_t.append('success.thank_you' + (_location ? '_location' : ''), {
+	      where: _location
+	    }));
+	    summary.append('p').call(_t.append('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').call(_t.append('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).call(_t.append('success.view_on_osm'));
+	    summaryDetail.append('div').html(_t.html('success.changeset_id', {
+	      changeset_id: {
+	        html: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+	      }
+	    })); // Get OSM community index features intersecting the map..
 
-	    var w = d;
-	    var h = d;
-	    var y = Math.round(d * 0.72);
-	    var l = Math.round(d * 0.6);
-	    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 ".concat(w, " ").concat(h));
-	    ['casing', 'stroke'].forEach(function (klass) {
-	      lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
+	    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
+
+	      communities.sort(function (a, b) {
+	        return a.area - b.area || b.order - a.order;
+	      });
+	      body.call(showCommunityLinks, communities.map(function (c) {
+	        return c.resource;
+	      }));
 	    });
-	    [[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);
+	  }
+
+	  function showCommunityLinks(selection, resources) {
+	    var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+	    communityLinks.append('h3').call(_t.append('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);
 	    });
-	    line = lineEnter.merge(line);
-	    line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
-	    line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
+	    var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+	    communityDetail.each(showCommunityDetails);
+	    communityLinks.append('div').attr('class', 'community-missing').call(_t.append('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').call(_t.append('success.tell_us'));
 	  }
 
-	  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 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..
 
-	    var w = d;
-	    var h = d;
-	    var y1 = Math.round(d * 0.80);
-	    var y2 = Math.round(d * 0.68);
-	    var l = Math.round(d * 0.6);
-	    var r = 2;
-	    var x1 = (w - l) / 2;
-	    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 ".concat(w, " ").concat(h));
-	    ['casing', 'stroke'].forEach(function (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);
-	    });
-	    route = routeEnter.merge(route);
+	    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));
+	    }
 
-	    if (drawRoute) {
-	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-	      var segmentPresetIDs = routeSegments[routeType];
+	    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
 
-	      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));
+	    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').text(nextEvents.length);
+	    }
+
+	    function showMore(selection) {
+	      var more = selection.selectAll('.community-more').data([0]);
+	      var moreEnter = more.enter().append('div').attr('class', 'community-more');
+
+	      if (d.resolved.extendedDescriptionHTML) {
+	        moreEnter.append('div').attr('class', 'community-extended-description').html(d.resolved.extendedDescriptionHTML);
+	      }
+
+	      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').call(_t.append('success.languages', {
+	          languages: languageList
+	        }));
 	      }
 	    }
-	  } // 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.
 
+	    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;
+	      }).text(function (d) {
+	        var name = d.name;
 
-	  var routeSegments = {
-	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
-	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-	    trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-	    detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
-	    ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
-	    foot: ['highway/footway', 'highway/footway', 'highway/footway'],
-	    hiking: ['highway/path', 'highway/path', 'highway/path'],
-	    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'],
-	    pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
-	    piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
-	    power: ['power/line', 'power/line', 'power/line'],
-	    road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
-	    subway: ['railway/subway', 'railway/subway', 'railway/subway'],
-	    train: ['railway/rail', 'railway/rail', 'railway/rail'],
-	    tram: ['railway/tram', 'railway/tram', 'railway/tram'],
-	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
-	  };
+	        if (d.i18n && d.id) {
+	          name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+	            "default": name
+	          });
+	        }
 
-	  function render() {
-	    var p = _preset.apply(this, arguments);
+	        return name;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-when').text(function (d) {
+	        var options = {
+	          weekday: 'short',
+	          day: 'numeric',
+	          month: 'short',
+	          year: 'numeric'
+	        };
 
-	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
+	        if (d.date.getHours() || d.date.getMinutes()) {
+	          // include time if it has one
+	          options.hour = 'numeric';
+	          options.minute = 'numeric';
+	        }
 
-	    if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
-	      geom = 'route';
+	        return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-where').text(function (d) {
+	        var where = d.where;
+
+	        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').text(function (d) {
+	        var description = d.description;
+
+	        if (d.i18n && d.id) {
+	          description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+	            "default": description
+	          });
+	        }
+
+	        return description;
+	      });
 	    }
+	  }
 
-	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-	    var isFallback = isSmall() && p.isFallback && p.isFallback();
-	    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 isiDIcon = picon && !(isMaki || isTemaki || isFa);
-	    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 drawRoute = picon && geom === 'route';
-	    var isFramed = drawVertex || drawArea || drawLine || drawRoute;
-	    var tags = !isCategory ? p.setTags({}, geom) : {};
+	  success.changeset = function (val) {
+	    if (!arguments.length) return _changeset;
+	    _changeset = val;
+	    return success;
+	  };
 
-	    for (var k in tags) {
-	      if (tags[k] === '*') {
-	        tags[k] = 'yes';
-	      }
+	  success.location = function (val) {
+	    if (!arguments.length) return _location;
+	    _location = val;
+	    return success;
+	  };
+
+	  return utilRebind(success, dispatch, 'on');
+	}
+
+	var sawVersion = null;
+	var isNewVersion = false;
+	var isNewUser = false;
+	function uiVersion(context) {
+	  var currVersion = context.version;
+	  var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
+
+	  if (sawVersion === null && matchedVersion !== null) {
+	    if (corePreferences('sawVersion')) {
+	      isNewUser = false;
+	      isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
+	    } else {
+	      isNewUser = true;
+	      isNewVersion = true;
 	    }
 
-	    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);
-	    renderPointBorder(container, drawPoint);
-	    renderCircleFill(container, drawVertex);
-	    renderSquareFill(container, drawArea, tagClasses);
-	    renderLine(container, drawLine, tagClasses);
-	    renderRoute(container, drawRoute, p);
-	    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('framed', isFramed).classed('preset-icon-iD', isiDIcon);
-	    icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
-	    icon.selectAll('use').attr('href', '#' + picon + (isMaki ? isSmall() && geom === 'point' ? '-11' : '-15' : ''));
-	    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);
+	    corePreferences('sawVersion', currVersion);
+	    sawVersion = currVersion;
 	  }
 
-	  presetIcon.preset = function (val) {
-	    if (!arguments.length) return _preset;
-	    _preset = utilFunctor(val);
-	    return presetIcon;
+	  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('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 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: '-'
+	  }];
+
+	  function zoomIn(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomIn();
+	  }
 
-	  presetIcon.geometry = function (val) {
-	    if (!arguments.length) return _geometry;
-	    _geometry = utilFunctor(val);
-	    return presetIcon;
-	  };
+	  function zoomOut(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOut();
+	  }
 
-	  presetIcon.sizeClass = function (val) {
-	    if (!arguments.length) return _sizeClass;
-	    _sizeClass = val;
-	    return presetIcon;
-	  };
+	  function zoomInFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomInFurther();
+	  }
 
-	  return presetIcon;
-	}
+	  function zoomOutFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOutFurther();
+	  }
 
-	function uiSectionFeatureType(context) {
-	  var dispatch$1 = dispatch('choose');
-	  var _entityIDs = [];
-	  var _presets = [];
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+	      if (d.disabled()) {
+	        return d.disabledTitle;
+	      }
 
-	  var _tagReference;
+	      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)();
+	      }
 
-	  var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+	      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);
+	    });
 
-	  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
+	    function updateButtonStates() {
+	      buttons.classed('disabled', function (d) {
+	        return d.disabled();
+	      }).each(function () {
+	        var selection = select(this);
 
-	    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);
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
+	        }
+	      });
 	    }
 
-	    selection.selectAll('.preset-reset').on('click', function () {
-	      dispatch$1.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) {
+	    updateButtonStates();
+	    context.map().on('move.uiZoom', updateButtonStates);
+	  };
+	}
+
+	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.html('inspector.title_count', {
+	      title: {
+	        html: _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'
+	  }];
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return section;
-	  };
+	  var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-	  section.presets = function (val) {
-	    if (!arguments.length) return _presets; // don't reload the same preset
 
-	    if (!utilArrayIdentical(val, _presets)) {
-	      _presets = val;
+	  var _readOnlyTags = []; // the keys in the order we want them to display
 
-	      if (_presets.length === 1) {
-	        _tagReference = uiTagReference(_presets[0].reference()).showing(false);
-	      }
-	    }
+	  var _orderedKeys = [];
+	  var _showBlank = false;
+	  var _pendingChange = null;
 
-	    return section;
-	  };
+	  var _state;
 
-	  function entityGeometries() {
-	    var counts = {};
+	  var _presets;
 
-	    for (var i in _entityIDs) {
-	      var geometry = context.graph().geometry(_entityIDs[i]);
-	      if (!counts[geometry]) counts[geometry] = 0;
-	      counts[geometry] += 1;
-	    }
+	  var _tags;
 
-	    return Object.keys(counts).sort(function (geom1, geom2) {
-	      return counts[geom2] - counts[geom1];
-	    });
+	  var _entityIDs;
+
+	  var _didInteract = false;
+
+	  function interacted() {
+	    _didInteract = true;
 	  }
 
-	  return utilRebind(section, dispatch$1, 'on');
-	}
+	  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
 
-	// It borrows some code from uiHelp
+	    var all = Object.keys(_tags).sort();
+	    var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-	function uiFieldHelp(context, fieldName) {
-	  var fieldHelp = {};
+	    for (var i in missingKeys) {
+	      _orderedKeys.push(missingKeys[i]);
+	    } // assemble row data
 
-	  var _inspector = select(null);
 
-	  var _wrap = select(null);
+	    var rowData = _orderedKeys.map(function (key, i) {
+	      return {
+	        index: i,
+	        key: key,
+	        value: _tags[key]
+	      };
+	    }); // append blank row last, if necessary
 
-	  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']]]
-	  };
-	  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
+	    if (!rowData.length || _showBlank) {
+	      _showBlank = false;
+	      rowData.push({
+	        index: rowData.length,
+	        key: '',
+	        value: ''
+	      });
+	    } // View Options
 
-	  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
+	    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').attr('role', 'tablist');
+	    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('aria-selected', function (d) {
+	      return _tagView === d.id;
+	    }).attr('role', 'tab').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;
+	      }).attr('aria-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 all + hhh + _t.html(subkey, replacements) + '\n\n';
-	    }, '');
-	    return {
-	      key: helpkey,
-	      title: _t.html(helpkey + '.title'),
-	      html: marked_1(text.trim())
-	    };
-	  });
+	    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 show() {
-	    updatePosition();
+	    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
 
-	    _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
-	  }
+	    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').attr('aria-label', _t('inspector.add_to_tag')).call(svgIcon('#iD-icon-plus', 'light')).call(uiTooltip().title(_t.html('inspector.add_to_tag')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left')).on('click', addTag);
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-	  function hide() {
-	    _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
-	      _body.classed('hide', true);
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // Tag list items
+
+	    var items = list.selectAll('.tag-row').data(rowData, function (d) {
+	      return d.key;
 	    });
-	  }
+	    items.exit().each(unbind).remove(); // Enter
 
-	  function clickHelp(index) {
-	    var d = docs[index];
-	    var tkeys = fieldHelpKeys[fieldName][index][1];
+	    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
 
-	    _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
-	      return i === index;
+	    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 content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
-
+	      var value = row.select('input.value'); // propagate bound data
 
-	    content.selectAll('p').attr('class', function (d, i) {
-	      return tkeys[i];
-	    }); // insert special content for certain help sections
+	      if (_entityIDs && taginfo && _state !== 'hover') {
+	        bindTypeahead(key, value);
+	      }
 
-	    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'));
-	    }
-	  }
+	      var referenceOptions = {
+	        key: d.key
+	      };
 
-	  fieldHelp.button = function (selection) {
-	    if (_body.empty()) return;
-	    var button = selection.selectAll('.field-help-button').data([0]); // enter/update
+	      if (typeof d.value === 'string') {
+	        referenceOptions.value = d.value;
+	      }
 
-	    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();
+	      var reference = uiTagReference(referenceOptions);
 
-	      if (_body.classed('hide')) {
-	        show();
-	      } else {
-	        hide();
+	      if (_state === 'hover') {
+	        reference.showing(false);
 	      }
-	    });
-	  };
 
-	  function updatePosition() {
-	    var wrap = _wrap.node();
+	      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) || 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
+	  }
 
-	    var inspector = _inspector.node();
+	  function isReadOnly(d) {
+	    for (var i = 0; i < _readOnlyTags.length; i++) {
+	      if (d.key.match(_readOnlyTags[i]) !== null) {
+	        return true;
+	      }
+	    }
 
-	    var wRect = wrap.getBoundingClientRect();
-	    var iRect = inspector.getBoundingClientRect();
+	    return false;
+	  }
 
-	    _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	  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');
 	  }
 
-	  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
+	  function stringify(s) {
+	    return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+	  }
 
-	    _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-	    if (_inspector.empty()) return;
-	    _body = _inspector.selectAll('.field-help-body').data([0]);
+	  function unstringify(s) {
+	    var leading = '';
+	    var trailing = '';
 
-	    var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
+	    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 = '"';
+	    }
 
-	    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 JSON.parse(leading + s + trailing);
+	  }
 
-	  return fieldHelp;
-	}
+	  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 uiFieldCheck(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var options = field.strings && field.strings.options;
-	  var values = [];
-	  var texts = [];
+	    if (_state !== 'hover' && str.length) {
+	      return str + '\n';
+	    }
 
-	  var _tags;
+	    return str;
+	  }
 
-	  var input = select(null);
-	  var text = select(null);
-	  var label = select(null);
-	  var reverser = select(null);
+	  function textChanged() {
+	    var newText = this.value.trim();
+	    var newTags = {};
+	    newText.split('\n').forEach(function (row) {
+	      var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-	  var _impliedYes;
+	      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
 
-	  var _entityIDs = [];
+	      if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
 
-	  var _value;
+	      if (change.type === '-') {
+	        _pendingChange[change.key] = undefined;
+	      } else if (change.type === '+') {
+	        _pendingChange[change.key] = change.newVal || '';
+	      }
+	    });
 
-	  if (options) {
-	    for (var k in options) {
-	      values.push(k === 'undefined' ? undefined : k);
-	      texts.push(field.t.html('options.' + k, {
-	        'default': options[k]
-	      }));
+	    if (Object.keys(_pendingChange).length === 0) {
+	      _pendingChange = null;
+	      return;
 	    }
-	  } 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'));
+	    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();
 	    }
-	  } // Checks tags to see whether an undefined value is "Assumed to be Yes"
+	  }
 
+	  function bindTypeahead(key, value) {
+	    if (isReadOnly(key.datum())) return;
 
-	  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 (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;
+	    }
+
+	    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));
+	      });
+	    }));
 
-	    if (field.id === 'oneway') {
-	      var entity = context.entity(_entityIDs[0]);
+	    function sort(value, data) {
+	      var sameletter = [];
+	      var other = [];
 
-	      for (var key in entity.tags) {
-	        if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
-	          _impliedYes = true;
-	          texts[0] = _t.html('presets.fields.oneway_yes.options.undefined');
-	          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]);
 	        }
 	      }
+
+	      return sameletter.concat(other);
 	    }
 	  }
 
-	  function reverserHidden() {
-	    if (!context.container().select('div.inspector-hover').empty()) return true;
-	    return !(_value === 'yes' || _impliedYes && !_value);
+	  function unbind() {
+	    var row = select(this);
+	    row.selectAll('input.key').call(uiCombobox.off, context);
+	    row.selectAll('input.value').call(uiCombobox.off, context);
 	  }
 
-	  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;
-	  }
+	  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 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 (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
+	    var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
 
-	    if (field.type === 'onewayCheck') {
-	      enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+	    if (isReadOnly({
+	      key: kNew
+	    })) {
+	      this.value = kOld;
+	      return;
 	    }
 
-	    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 (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
+	      // new key is already in use, switch focus to the existing row
+	      this.value = kOld; // reset the key
 
-	      if (Array.isArray(_tags[field.key])) {
-	        if (values.indexOf('yes') !== -1) {
-	          t[field.key] = 'yes';
-	        } else {
-	          t[field.key] = values[0];
+	      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();
 	        }
-	      } 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)
+	      });
+	      return;
+	    }
 
+	    _pendingChange = _pendingChange || {};
 
-	      if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-	        t[field.key] = values[0];
-	      }
+	    if (kOld) {
+	      if (kOld === kNew) return; // a tag key was renamed
 
-	      dispatch$1.call('change', this, t);
-	    });
+	      _pendingChange[kNew] = _pendingChange[kOld] || {
+	        oldKey: kOld
+	      };
+	      _pendingChange[kOld] = undefined;
+	    } else {
+	      // a new tag was added
+	      var row = this.parentNode.parentNode;
+	      var inputVal = select(row).selectAll('input.value');
+	      var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	      _pendingChange[kNew] = vNew;
+	      utilGetSetValue(inputVal, vNew);
+	    } // update the ordered key index so this row doesn't change position
 
-	    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
+	    var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-	        context.validator().validate();
-	        select(this).call(reverserSetText);
-	      });
-	    }
-	  };
+	    if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+	    d.key = kNew; // update datum to avoid exit/enter on tag update
 
-	  check.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return check;
-	  };
+	    this.value = kNew;
+	    scheduleChange();
+	  }
 
-	  check.tags = function (tags) {
-	    _tags = tags;
+	  function valueChange(d3_event, d) {
+	    if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
-	    function isChecked(val) {
-	      return val !== 'no' && val !== '' && val !== undefined && val !== null;
-	    }
+	    if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-	    function textFor(val) {
-	      if (val === '') val = undefined;
-	      var index = values.indexOf(val);
-	      return index !== -1 ? texts[index] : '"' + val + '"';
-	    }
+	    if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+	    _pendingChange = _pendingChange || {};
+	    _pendingChange[d.key] = context.cleanTagValue(this.value);
+	    scheduleChange();
+	  }
 
-	    checkImpliedYes();
-	    var isMixed = Array.isArray(tags[field.key]);
-	    _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+	  function removeTag(d3_event, d) {
+	    if (isReadOnly(d)) return;
 
-	    if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-	      _value = 'yes';
+	    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();
 	    }
+	  }
 
-	    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);
+	  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);
+	  }
 
-	    if (field.type === 'onewayCheck') {
-	      reverser.classed('hide', reverserHidden()).call(reverserSetText);
+	  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;
+	      dispatch.call('change', this, entityIDs, _pendingChange);
+	      _pendingChange = null;
+	    }, 10);
+	  }
+
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
+
+	    if (_state !== val) {
+	      _orderedKeys = [];
+	      _state = val;
 	    }
-	  };
 
-	  check.focus = function () {
-	    input.node().focus();
+	    return section;
 	  };
 
-	  return utilRebind(check, dispatch$1, 'on');
-	}
-
-	function uiFieldCombo(field, context) {
-	  var dispatch$1 = dispatch('change');
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+	    _presets = val;
 
-	  var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
+	    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);
+	    }
 
-	  var _isNetwork = field.type === 'networkCombo';
+	    return section;
+	  };
 
-	  var _isSemi = field.type === 'semiCombo';
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return section;
+	  };
 
-	  var _optstrings = field.strings && field.strings.options;
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	  var _optarray = field.options;
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _orderedKeys = [];
+	    }
 
-	  var _snake_case = field.snake_case || field.snake_case === undefined;
+	    return section;
+	  }; // pass an array of regular expressions to test against the tag key
 
-	  var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-	  var _container = select(null);
+	  section.readOnlyTags = function (val) {
+	    if (!arguments.length) return _readOnlyTags;
+	    _readOnlyTags = val;
+	    return section;
+	  };
 
-	  var _inputWrap = select(null);
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	  var _input = select(null);
+	function uiDataEditor(context) {
+	  var dataHeader = uiDataHeader();
+	  var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-	  var _comboData = [];
-	  var _multiData = [];
-	  var _entityIDs = [];
+	  var _datum;
 
-	  var _tags;
+	  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').attr('title', _t('icons.close')).on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('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
 
-	  var _countryCode;
+	    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
 
-	  var _staticPlaceholder; // initialize deprecated tags array
+	    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;
+	  };
 
-	  var _dataDeprecated = [];
-	  _mainFileFetcher.get('deprecated').then(function (d) {
-	    _dataDeprecated = d;
-	  })["catch"](function () {
-	    /* ignore */
-	  }); // ensure multiCombo field.key ends with a ':'
+	  return dataEditor;
+	}
 
-	  if (_isMulti && field.key && /[^:]$/.test(field.key)) {
-	    field.key += ':';
-	  }
+	function uiOsmoseDetails(context) {
+	  var _qaItem;
 
-	  function snake(s) {
-	    return s.replace(/\s+/g, '_');
-	  }
+	  function issueString(d, type) {
+	    if (!d) return ''; // Issue strings are cached from Osmose API
 
-	  function unsnake(s) {
-	    return s.replace(/_+/g, ' ');
+	    var s = services.osmose.getStrings(d.itemType);
+	    return type in s ? s[type] : '';
 	  }
 
-	  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)
+	  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
 
+	    if (issueString(_qaItem, 'detail')) {
+	      var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	      div.append('h4').call(_t.append('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)
 
-	  function tagValue(dval) {
-	    dval = clean(dval || '');
 
-	    if (_optstrings) {
-	      var found = _comboData.find(function (o) {
-	        return o.key && clean(o.value) === dval;
-	      });
+	    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)
 
-	      if (found) {
-	        return found.key;
-	      }
-	    }
+	    if (issueString(_qaItem, 'fix')) {
+	      var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	    if (field.type === 'typeCombo' && !dval) {
-	      return 'yes';
-	    }
+	      _div.append('h4').call(_t.append('QA.osmose.fix_title'));
 
-	    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)
+	      _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)
 
 
-	  function displayValue(tval) {
-	    tval = tval || '';
+	    if (issueString(_qaItem, 'trap')) {
+	      var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	    if (_optstrings) {
-	      var found = _comboData.find(function (o) {
-	        return o.key === tval && o.value;
-	      });
+	      _div2.append('h4').call(_t.append('QA.osmose.trap_title'));
 
-	      if (found) {
-	        return found.value;
-	      }
-	    }
+	      _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
 
-	    if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-	      return '';
-	    }
 
-	    return _snake_case ? unsnake(tval) : tval;
-	  } // Compute the difference between arrays of objects by `value` property
-	  //
-	  // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
-	  // > [{value:1}, {value:3}]
-	  //
+	    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-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string
 
-	  function objectDifference(a, b) {
-	    return a.filter(function (d1) {
-	      return !b.some(function (d2) {
-	        return !d2.isMixed && d1.value === d2.value;
-	      });
-	    });
-	  }
+	      if (d.detail) {
+	        detailsDiv.append('h4').call(_t.append('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
 
-	  function initCombo(selection, attachTo) {
-	    if (_optstrings) {
-	      selection.attr('readonly', 'readonly');
-	      selection.call(_combobox, attachTo);
-	      setStaticValues(setPlaceholder);
-	    } else if (_optarray) {
-	      selection.call(_combobox, attachTo);
-	      setStaticValues(setPlaceholder);
-	    } else if (services.taginfo) {
-	      selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
-	      setTaginfoValues('', setPlaceholder);
-	    }
-	  }
 
-	  function setStaticValues(callback) {
-	    if (!(_optstrings || _optarray)) return;
+	      elemsDiv.append('h4').call(_t.append('QA.osmose.elems_title'));
+	      elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').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
 
-	    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,
-	          display: field.t.html('options.' + k, {
-	            'default': _optstrings[k]
-	          })
-	        };
-	      });
-	    } else if (_optarray) {
-	      _comboData = _optarray.map(function (k) {
-	        var v = _snake_case ? unsnake(k) : k;
-	        return {
-	          key: k,
-	          value: v,
-	          title: v
-	        };
-	      });
-	    }
+	        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');
 
-	    _combobox.data(objectDifference(_comboData, _multiData));
+	          if (!osmlayer.enabled()) {
+	            osmlayer.enabled(true);
+	          }
 
-	    if (callback) callback(_comboData);
-	  }
+	          context.map().centerZoom(d.loc, 20);
 
-	  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 (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)
 
-	    if (hasCountryPrefix) {
-	      query = _countryCode + ':';
-	    }
+	        if (entity) {
+	          var name = utilDisplayName(entity); // try to use common name
 
-	    var params = {
-	      debounce: q !== '',
-	      key: field.key,
-	      query: query
-	    };
+	          if (!name) {
+	            var preset = _mainPresetIndex.match(entity, context.graph());
+	            name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	          }
 
-	    if (_entityIDs.length) {
-	      params.geometry = context.graph().geometry(_entityIDs[0]);
-	    }
+	          if (name) {
+	            this.innerText = name;
+	          }
+	        }
+	      }); // Don't hide entities related to this issue - #5880
 
-	    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
+	      context.features().forceVisible(d.elems);
+	      context.map().pan([0, 0]); // trigger a redraw
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
+	  osmoseDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseDetails;
+	  };
 
-	        return !d.count || d.count > 10;
-	      });
-	      var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
+	  return osmoseDetails;
+	}
 
-	      if (deprecatedValues) {
-	        // don't suggest deprecated tag values
-	        data = data.filter(function (d) {
-	          return deprecatedValues.indexOf(d.value) === -1;
-	        });
-	      }
+	function uiOsmoseHeader() {
+	  var _qaItem;
 
-	      if (hasCountryPrefix) {
-	        data = data.filter(function (d) {
-	          return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-	        });
-	      } // hide the caret if there are no suggestions
+	  function issueTitle(d) {
+	    var unknown = _t('inspector.unknown');
+	    if (!d) return unknown; // Issue titles supplied by Osmose
 
+	    var s = services.osmose.getStrings(d.itemType);
+	    return 'title' in s ? s.title : unknown;
+	  }
 
-	      _container.classed('empty-combobox', data.length === 0);
+	  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;
 
-	      _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);
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
 	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').text(issueTitle);
 	  }
 
-	  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(', ');
-	    }
+	  osmoseHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseHeader;
+	  };
+
+	  return osmoseHeader;
+	}
+
+	function uiViewOnOsmose() {
+	  var _qaItem;
 
-	    if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-	      _staticPlaceholder += '…';
+	  function viewOnOsmose(selection) {
+	    var url;
+
+	    if (services.osmose && _qaItem instanceof QAItem) {
+	      url = services.osmose.itemURL(_qaItem);
 	    }
 
-	    var ph;
+	    var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-	    if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
-	      ph = _t('inspector.multiple_values');
-	    } else {
-	      ph = _staticPlaceholder;
-	    }
+	    link.exit().remove(); // enter
 
-	    _container.selectAll('input').attr('placeholder', ph);
+	    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').call(_t.append('inspector.view_on_osmose'));
 	  }
 
-	  function change() {
-	    var t = {};
-	    var val;
-
-	    if (_isMulti || _isSemi) {
-	      val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
+	  viewOnOsmose.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnOsmose;
+	  };
 
-	      _container.classed('active', false);
+	  return viewOnOsmose;
+	}
 
-	      utilGetSetValue(_input, '');
-	      var vals = val.split(';').filter(Boolean);
-	      if (!vals.length) return;
+	function uiOsmoseEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiOsmoseDetails(context);
+	  var qaHeader = uiOsmoseHeader();
 
-	      if (_isMulti) {
-	        utilArrayUniq(vals).forEach(function (v) {
-	          var key = (field.key || '') + v;
+	  var _qaItem;
 
-	          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;
-	          }
+	  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').attr('title', _t('icons.close')).on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('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));
+	  }
 
-	          key = context.cleanTagKey(key);
-	          field.keys.push(key);
-	          t[key] = 'yes';
-	        });
-	      } else if (_isSemi) {
-	        var arr = _multiData.map(function (d) {
-	          return d.key;
-	        });
+	  function osmoseSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        arr = arr.concat(vals);
-	        t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
-	      }
+	    var isShown = _qaItem && isSelected;
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	      window.setTimeout(function () {
-	        _input.node().focus();
-	      }, 10);
-	    } else {
-	      var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
+	    saveSection.exit().remove(); // enter
 
-	      if (!rawValue && Array.isArray(_tags[field.key])) return;
-	      val = context.cleanTagValue(tagValue(rawValue));
-	      t[field.key] = val || undefined;
-	    }
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
-	    dispatch$1.call('change', this, t);
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 	  }
 
-	  function removeMultikey(d3_event, d) {
-	    d3_event.preventDefault();
-	    d3_event.stopPropagation();
-	    var t = {};
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    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);
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	      arr = utilArrayUniq(arr);
-	      t[field.key] = arr.length ? arr.join(';') : undefined;
-	    }
+	    buttonSection.exit().remove(); // enter
 
-	    dispatch$1.call('change', this, t);
-	  }
+	    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
 
-	  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);
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.close-button').call(_t.append('QA.keepRight.close')).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    if (_isMulti || _isSemi) {
-	      _container = _container.selectAll('.chiplist').data([0]);
-	      var listClass = 'chiplist'; // Use a separate line for each value in the Destinations field
-	      // to mimic highway exit signs
+	      var qaService = services.osmose;
 
-	      if (field.key === 'destination') {
-	        listClass += ' full-line-chips';
+	      if (qaService) {
+	        d.newStatus = 'done';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
 	      }
+	    });
+	    buttonSection.select('.ignore-button').call(_t.append('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	      _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]);
-	    }
+	      var qaService = services.osmose;
 
-	    _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
+	      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
 
-	    if (_isNetwork) {
-	      var extent = combinedEntityExtent();
-	      var countryCode = extent && iso1A2Code(extent.center());
-	      _countryCode = countryCode && countryCode.toLowerCase();
-	    }
 
-	    _input.on('change', change).on('blur', change);
+	  osmoseEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseEditor;
+	  };
 
-	    _input.on('keydown.field', function (d3_event) {
-	      switch (d3_event.keyCode) {
-	        case 13:
-	          // ↩ Return
-	          _input.node().blur(); // blurring also enters the value
+	  return utilRebind(osmoseEditor, dispatch, 'on');
+	}
 
+	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);
 
-	          d3_event.stopPropagation();
-	          break;
-	      }
-	    });
+	  var _current;
 
-	    if (_isMulti || _isSemi) {
-	      _combobox.on('accept', function () {
-	        _input.node().blur();
+	  var _wasData = false;
+	  var _wasNote = false;
+	  var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
-	        _input.node().focus();
-	      });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	      _input.on('focus', function () {
-	        _container.classed('active', true);
-	      });
-	    }
-	  }
+	  function sidebar(selection) {
+	    var container = context.container();
+	    var minWidth = 240;
+	    var sidebarWidth;
+	    var containerWidth;
+	    var dragOffset; // Set the initial width constraints
 
-	  combo.tags = function (tags) {
-	    _tags = tags;
+	    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;
 
-	    if (_isMulti || _isSemi) {
-	      _multiData = [];
-	      var maxLength;
+	    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
 
-	      if (_isMulti) {
-	        // Build _multiData array containing keys already set..
-	        for (var k in tags) {
-	          if (field.key && k.indexOf(field.key) !== 0 || field.keys.indexOf(k) === -1) continue;
-	          var v = tags[k];
-	          if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
-	          var suffix = field.key ? k.substring(field.key.length) : k;
+	      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
 
-	          _multiData.push({
-	            key: k,
-	            value: displayValue(suffix),
-	            isMixed: Array.isArray(v)
-	          });
-	        }
+	      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);
+	    }
 
-	        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
+	    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);
 
-	          maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
-	        } else {
-	          maxLength = context.maxCharsForTagKey();
+	      if (shouldCollapse) {
+	        if (!isCollapsed) {
+	          selection.style(xMarginProperty, '-400px').style('width', '400px');
+	          context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
 	        }
-	      } else if (_isSemi) {
-	        var allValues = [];
-	        var commonValues;
-
-	        if (Array.isArray(tags[field.key])) {
-	          tags[field.key].forEach(function (tagVal) {
-	            var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-	            allValues = allValues.concat(thisVals);
+	      } else {
+	        var widthPct = sidebarWidth / containerWidth * 100;
+	        selection.style(xMarginProperty, null).style('width', widthPct + '%');
 
-	            if (!commonValues) {
-	              commonValues = thisVals;
-	            } else {
-	              commonValues = commonValues.filter(function (value) {
-	                return thisVals.includes(value);
-	              });
-	            }
-	          });
-	          allValues = utilArrayUniq(allValues).filter(Boolean);
+	        if (isCollapsed) {
+	          context.ui().onResize([-sidebarWidth * scaleX, 0]);
 	        } else {
-	          allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-	          commonValues = allValues;
+	          context.ui().onResize([-dx * scaleX, 0]);
 	        }
+	      }
+	    }
 
-	        _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
+	    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);
+	    }
 
-	        maxLength = context.maxCharsForTagValue() - currLength;
+	    var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+	    var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-	        if (currLength > 0) {
-	          // account for the separator if a new value will be appended to existing
-	          maxLength -= 1;
+	    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;
+	        });
+
+	        if (!elements.empty()) {
+	          elements.classed('hover', true);
 	        }
-	      } // a negative maxlength doesn't make sense
+	      }
+	    };
 
+	    sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-	      maxLength = Math.max(0, maxLength);
-	      var allowDragAndDrop = _isSemi // only semiCombo values are ordered
-	      && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
+	    function hover(targets) {
+	      var datum = targets && targets.length && targets[0];
 
-	      var available = objectDifference(_comboData, _multiData);
+	      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;
 
-	      _combobox.data(available); // 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
+	        if (osm) {
+	          datum = osm.getNote(datum.id); // marker may contain stale data - get latest
+	        }
 
+	        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];
 
-	      var hideAdd = _optstrings && !available.length || maxLength <= 0;
+	        if (errService) {
+	          // marker may contain stale data - get latest
+	          datum = errService.getError(datum.id);
+	        } // Currently only three possible services
 
-	      _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
+	        var errEditor;
 
-	      var chips = _container.selectAll('.chip').data(_multiData);
+	        if (datum.service === 'keepRight') {
+	          errEditor = keepRightEditor;
+	        } else if (datum.service === 'osmose') {
+	          errEditor = osmoseEditor;
+	        } else {
+	          errEditor = improveOsmEditor;
+	        }
 
-	      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('draggable', allowDragAndDrop).classed('mixed', function (d) {
-	        return d.isMixed;
-	      }).attr('title', function (d) {
-	        return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
-	      });
+	        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 (allowDragAndDrop) {
-	        registerDragAndDrop(chips);
+	        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();
 	      }
-
-	      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);
-	      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 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') {
-	        // 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%)';
-	          }
+	    sidebar.hover = throttle(hover, 200);
 
-	          return null;
-	        });
-	      } else {
-	        _container.selectAll('.chip').each(function (d2, index2) {
-	          var node = select(this).node(); // check the cursor is in the bounding box
+	    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 (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();
+	    sidebar.select = function (ids, newFeature) {
+	      sidebar.hide();
 
-	          if (index === index2) {
-	            return 'translate(' + x + 'px, ' + y + 'px)';
-	          } // only translate tags in the same row
+	      if (ids && ids.length) {
+	        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));
+	        }
 
-	          if (node.offsetTop === targetIndexOffsetTop) {
-	            if (index2 < index && index2 >= targetIndex) {
-	              return 'translateX(' + draggedTagWidth + 'px)';
-	            } else if (index2 > index && index2 <= targetIndex) {
-	              return 'translateX(-' + draggedTagWidth + 'px)';
-	            }
-	          }
+	        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
 
-	          return null;
-	        });
-	      }
-	    }).on('end', function () {
-	      if (!select(this).classed('dragging')) {
-	        return;
+	        inspector.state('select').entityIDs(ids).newFeature(newFeature);
+	        inspectorWrap.call(inspector);
+	      } else {
+	        inspector.state('hide');
 	      }
+	    };
 
-	      var index = selection.nodes().indexOf(this);
-	      select(this).classed('dragging', false);
+	    sidebar.showPresetList = function () {
+	      inspector.showList();
+	    };
 
-	      _container.selectAll('.chip').style('transform', null);
+	    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);
+	    };
 
-	      if (typeof targetIndex === 'number') {
-	        var element = _multiData[index];
+	    sidebar.hide = function () {
+	      featureListWrap.classed('inspector-hidden', false);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = null;
+	    };
 
-	        _multiData.splice(index, 1);
+	    sidebar.expand = function (moveMap) {
+	      if (selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	        _multiData.splice(targetIndex, 0, element);
+	    sidebar.collapse = function (moveMap) {
+	      if (!selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	        var t = {};
+	    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
 
-	        if (_multiData.length) {
-	          t[field.key] = _multiData.map(function (element) {
-	            return element.key;
-	          }).join(';');
-	        } else {
-	          t[field.key] = undefined;
-	        }
+	      selection.style('width', sidebarWidth + 'px');
+	      var startMargin, endMargin, lastMargin;
 
-	        dispatch$1.call('change', this, t);
+	      if (isCollapsing) {
+	        startMargin = lastMargin = 0;
+	        endMargin = -sidebarWidth;
+	      } else {
+	        startMargin = lastMargin = -sidebarWidth;
+	        endMargin = 0;
 	      }
 
-	      dragOrigin = undefined;
-	      targetIndex = undefined;
-	    }));
-	  }
+	      if (!isCollapsing) {
+	        // unhide the sidebar's content before it transitions onscreen
+	        selection.classed('collapsed', isCollapsing);
+	      }
 
-	  combo.focus = function () {
-	    _input.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 %
 
-	  combo.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return combo;
-	  };
 
-	  function combinedEntityExtent() {
-	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	  }
+	        if (!isCollapsing) {
+	          var containerWidth = container.node().getBoundingClientRect().width;
+	          var widthPct = sidebarWidth / containerWidth * 100;
+	          selection.style(xMarginProperty, null).style('width', widthPct + '%');
+	        }
+	      });
+	    }; // toggle the sidebar collapse when double-clicking the resizer
 
-	  return utilRebind(combo, dispatch$1, 'on');
-	}
 
-	function uiFieldText(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var input = select(null);
-	  var outlinkButton = select(null);
-	  var _entityIDs = [];
+	    resizer.on('dblclick', function (d3_event) {
+	      d3_event.preventDefault();
 
-	  var _tags;
+	      if (d3_event.sourceEvent) {
+	        d3_event.sourceEvent.preventDefault();
+	      }
 
-	  var _phoneFormats = {};
+	      sidebar.toggle();
+	    }); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-	  if (field.type === 'tel') {
-	    _mainFileFetcher.get('phone_formats').then(function (d) {
-	      _phoneFormats = d;
-	      updatePhonePlaceholder();
-	    })["catch"](function () {
-	      /* ignore */
+	    context.map().on('crossEditableZoom.sidebar', function (within) {
+	      if (!within && !selection.select('.inspector-hover').empty()) {
+	        hover([]);
+	      }
 	    });
 	  }
 
-	  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);
-	    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());
+	  sidebar.showPresetList = function () {};
 
-	    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);
+	  sidebar.hover = function () {};
 
-	        if (domainResults.length >= 2 && domainResults[1]) {
-	          var domain = domainResults[1];
-	          return _t('icons.view_on', {
-	            domain: domain
-	          });
-	        }
+	  sidebar.hover.cancel = function () {};
 
-	        return '';
-	      }).on('click', function (d3_event) {
-	        d3_event.preventDefault();
-	        var value = validIdentifierValueForLink();
+	  sidebar.intersects = function () {};
 
-	        if (value) {
-	          var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-	          window.open(url, '_blank');
-	        }
-	      }).merge(outlinkButton);
-	    }
-	  }
+	  sidebar.select = function () {};
 
-	  function updatePhonePlaceholder() {
-	    if (input.empty() || !Object.keys(_phoneFormats).length) return;
-	    var extent = combinedEntityExtent();
-	    var countryCode = extent && iso1A2Code(extent.center());
+	  sidebar.show = function () {};
 
-	    var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
+	  sidebar.hide = function () {};
 
-	    if (format) input.attr('placeholder', format);
-	  }
+	  sidebar.expand = function () {};
 
-	  function validIdentifierValueForLink() {
-	    if (field.type === 'identifier' && field.pattern) {
-	      var value = utilGetSetValue(input).trim().split(';')[0];
-	      return value && value.match(new RegExp(field.pattern));
-	    }
+	  sidebar.collapse = function () {};
 
-	    return null;
-	  } // clamp number to min/max
+	  sidebar.toggle = function () {};
 
+	  return sidebar;
+	}
 
-	  function clamped(num) {
-	    if (field.minValue !== undefined) {
-	      num = Math.max(num, field.minValue);
-	    }
+	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.html('self_intersection.error.areas'))();
+	  });
+	  mode.wayID = wayID;
 
-	    if (field.maxValue !== undefined) {
-	      num = Math.min(num, field.maxValue);
-	    }
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	    return num;
-	  }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	  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
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	      if (!val && Array.isArray(_tags[field.key])) return;
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	      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(';');
-	        }
+	  return mode;
+	}
 
-	        utilGetSetValue(input, val);
-	      }
+	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');
 
-	      t[field.key] = val || undefined;
-	      dispatch$1.call('change', this, t, onInput);
+	  function actionClose(wayId) {
+	    return function (graph) {
+	      return graph.replace(graph.entity(wayId).close());
 	    };
 	  }
 
-	  i.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return i;
-	  };
+	  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));
+	  }
 
-	  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);
+	  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));
+	  }
 
-	    if (outlinkButton && !outlinkButton.empty()) {
-	      var disabled = !validIdentifierValueForLink();
-	      outlinkButton.classed('disabled', disabled);
-	    }
-	  };
+	  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));
+	  }
 
-	  i.focus = function () {
-	    var node = input.node();
-	    if (node) node.focus();
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
 
-	  function combinedEntityExtent() {
-	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	  }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	  return utilRebind(i, dispatch$1, 'on');
+	  return mode;
 	}
 
-	function uiFieldAccess(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var items = select(null);
-
-	  var _tags;
-
-	  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
+	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');
 
-	    var enter = items.enter().append('li').attr('class', function (d) {
-	      return 'labeled-input preset-access-' + d;
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
 	    });
-	    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);
+	    var way = osmWay({
+	      tags: defaultTags
 	    });
-	    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);
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
 	  }
 
-	  function change(d3_event, d) {
-	    var tag = {};
-	    var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+	  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));
+	  }
 
-	    if (!value && typeof _tags[d] !== 'string') return;
-	    tag[d] = value || undefined;
-	    dispatch$1.call('change', this, tag);
+	  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));
 	  }
 
-	  access.options = function (type) {
-	    var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	    if (type !== 'access') {
-	      options.unshift('yes');
-	      options.push('designated');
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	      if (type === 'bicycle') {
-	        options.push('dismount');
-	      }
-	    }
+	  return mode;
+	}
 
-	    return options.map(function (option) {
-	      return {
-	        title: field.t('options.' + option + '.description'),
-	        value: option
-	      };
+	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);
+	  }
 
-	  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 addWay(loc, edge) {
+	    var node = osmNode({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node), _t('operations.add.annotation.vertex'));
+	    enterSelectMode(node);
+	  }
 
-	  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');
-	      }
+	  function enterSelectMode(node) {
+	    context.enter(modeSelect(context, [node.id]).newFeature(true));
+	  }
 
-	      if (d === 'access') {
-	        return 'yes';
-	      }
+	  function addNode(node) {
+	    if (Object.keys(defaultTags).length === 0) {
+	      enterSelectMode(node);
+	      return;
+	    }
 
-	      if (tags.access && typeof tags.access === 'string') {
-	        return tags.access;
-	      }
+	    var tags = Object.assign({}, node.tags); // shallow copy
 
-	      if (tags.highway) {
-	        if (typeof tags.highway === 'string') {
-	          if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
-	            return placeholdersByHighway[tags.highway][d];
-	          }
-	        } else {
-	          var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
-	            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
-	          }).filter(Boolean);
+	    for (var key in defaultTags) {
+	      tags[key] = defaultTags[key];
+	    }
 
-	          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];
-	          }
-	        }
-	      }
+	    context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
+	  }
 
-	      return field.placeholder();
-	    });
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
+
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
 
-	  access.focus = function () {
-	    items.selectAll('.preset-input-access').node().focus();
+	  mode.exit = function () {
+	    context.uninstall(behavior);
 	  };
 
-	  return utilRebind(access, dispatch$1, 'on');
+	  return mode;
 	}
 
-	function uiFieldAddress(field, context) {
-	  var dispatch$1 = dispatch('change');
+	function modeSelectNote(context, selectedNoteID) {
+	  var mode = {
+	    id: 'select-note',
+	    button: 'browse'
+	  };
 
-	  var _selection = select(null);
+	  var _keybinding = utilKeybinding('select-note');
 
-	  var _wrap = select(null);
+	  var _noteEditor = uiNoteEditor(context).on('change', function () {
+	    context.map().pan([0, 0]); // trigger a redraw
 
-	  var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
+	    var note = checkSelectedID();
+	    if (!note) return;
+	    context.ui().sidebar.show(_noteEditor.note(note));
+	  });
 
-	  var _entityIDs = [];
+	  var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	  var _newFeature = false;
 
-	  var _tags;
+	  function checkSelectedID() {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	  var _countryCode;
+	    if (!note) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	  var _addressFormats = [{
-	    format: [['housenumber', 'street'], ['city', 'postcode']]
-	  }];
-	  _mainFileFetcher.get('address_formats').then(function (d) {
-	    _addressFormats = d;
+	    return note;
+	  } // class the note as selected, or return to browse mode if the note is gone
 
-	    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;
-	    });
-	    return utilArrayUniqBy(streets, 'value');
+	  function selectNote(d3_event, drawn) {
+	    if (!checkSelectedID()) return;
+	    var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
 
-	    function isAddressable(d) {
-	      return d.tags.highway && d.tags.name && d.type === 'way';
+	    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;
+
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
+	      context.selectedNoteID(selectedNoteID);
 	    }
 	  }
 
-	  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');
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	    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;
-	      }
+	  mode.zoomToSelected = function () {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	      if (d.tags['addr:city']) return true;
-	      return false;
+	    if (note) {
+	      context.map().centerZoomEase(note.loc, 20);
 	    }
-	  }
+	  };
 
-	  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;
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
+
+	  mode.enter = function () {
+	    var note = checkSelectedID();
+	    if (!note) return;
+
+	    _behaviors.forEach(context.install);
+
+	    _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+
+	    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
+
+	    sidebar.expand(sidebar.intersects(note.extent()));
+	    context.map().on('drawn.select', selectNote);
+	  };
+
+	  mode.exit = function () {
+	    _behaviors.forEach(context.uninstall);
+
+	    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);
+	  };
+
+	  return mode;
+	}
+
+	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: []
 	    });
-	    return utilArrayUniqBy(results, 'value');
+	    osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)
+
+	    context.map().pan([0, 0]);
+	    context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
 	  }
 
-	  function updateForCountryCode() {
-	    if (!_countryCode) return;
-	    var addressFormat;
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	    for (var i = 0; i < _addressFormats.length; i++) {
-	      var format = _addressFormats[i];
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	      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
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        break;
-	      }
-	    }
+	  return mode;
+	}
 
-	    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
-	    };
+	function modeSave(context) {
+	  var mode = {
+	    id: 'save'
+	  };
+	  var keybinding = utilKeybinding('modeSave');
+	  var commit = uiCommit(context).on('cancel', cancel);
 
-	    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
-	        };
-	      });
-	    }
+	  var _conflictsUi; // uiConflicts
 
-	    var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
-	      return d.toString();
+
+	  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 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);
+	  }
 
-	    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 + '%';
+	  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();
+	  }
 
-	    function addDropdown(d) {
-	      if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
+	  function showSuccess(changeset) {
+	    commit.reset();
 
-	      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));
-	      }));
-	    }
+	    var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+	      context.ui().sidebar.hide();
+	    });
 
-	    _wrap.selectAll('input').on('blur', change()).on('change', change());
+	    context.enter(modeBrowse(context).sidebar(ui));
+	  }
 
-	    _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
-	    if (_tags) updateTags(_tags);
+	  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 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
+	      });
+	    });
 	  }
 
-	  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();
+	  mode.selectedIDs = function () {
+	    return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+	  };
 
-	    if (extent) {
-	      var countryCode;
+	  mode.enter = function () {
+	    // Show sidebar
+	    context.ui().sidebar.expand();
 
-	      if (context.inIntro()) {
-	        // localize the address format for the walkthrough
-	        countryCode = _t('intro.graph.countrycode');
-	      } else {
-	        var center = extent.center();
-	        countryCode = iso1A2Code(center);
-	      }
+	    function done() {
+	      context.ui().sidebar.show(commit);
+	    }
 
-	      if (countryCode) {
-	        _countryCode = countryCode.toLowerCase();
-	        updateForCountryCode();
-	      }
+	    keybindingOn();
+	    context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	    var osm = context.connection();
+
+	    if (!osm) {
+	      cancel();
+	      return;
 	    }
-	  }
 
-	  function change(onInput) {
-	    return function () {
-	      var tags = {};
+	    if (osm.authenticated()) {
+	      done();
+	    } else {
+	      osm.authenticate(function (err) {
+	        if (err) {
+	          cancel();
+	        } else {
+	          done();
+	        }
+	      });
+	    }
+	  };
 
-	      _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
+	  mode.exit = function () {
+	    keybindingOff();
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    context.ui().sidebar.hide();
+	  };
 
-	        if (Array.isArray(_tags[key]) && !value) return;
-	        tags[key] = value || undefined;
+	  return mode;
+	}
+
+	function modeSelectError(context, selectedErrorID, selectedErrorService) {
+	  var mode = {
+	    id: 'select-error',
+	    button: 'browse'
+	  };
+	  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;
 
-	      dispatch$1.call('change', this, tags, onInput);
-	    };
-	  }
+	    case 'keepRight':
+	      errorEditor = uiKeepRightEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	  function updatePlaceholder(inputSelection) {
-	    return inputSelection.attr('placeholder', function (subfield) {
-	      if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-	        return _t('inspector.multiple_values');
-	      }
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	      if (_countryCode) {
-	        var localkey = subfield.id + '!' + _countryCode;
-	        var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-	        return addrField.t('placeholders.' + tkey);
-	      }
-	    });
-	  }
+	    case 'osmose':
+	      errorEditor = uiOsmoseEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	  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);
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 	  }
 
-	  function combinedEntityExtent() {
-	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	  }
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-	  address.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return address;
-	  };
+	  function checkSelectedID() {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	  address.tags = function (tags) {
-	    _tags = tags;
-	    updateTags(tags);
-	  };
+	    if (!error) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	  address.focus = function () {
-	    var node = _wrap.selectAll('input').node();
+	    return error;
+	  }
 
-	    if (node) node.focus();
+	  mode.zoomToSelected = function () {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
+
+	    if (error) {
+	      context.map().centerZoomEase(error.loc, 20);
+	    }
 	  };
 
-	  return utilRebind(address, dispatch$1, 'on');
-	}
+	  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
 
-	function uiFieldCycleway(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var items = select(null);
-	  var wrap = select(null);
+	    function selectError(d3_event, drawn) {
+	      if (!checkSelectedID()) return;
+	      var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-	  var _tags;
+	      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 cycleway(selection) {
-	    function stripcolon(s) {
-	      return s.replace(':', '');
+	        if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	          context.enter(modeBrowse(context));
+	        }
+	      } else {
+	        selection.classed('selected', true);
+	        context.selectedErrorID(selectedErrorID);
+	      }
 	    }
 
-	    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
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
+	  };
 
-	    wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
-	  }
+	  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([]);
+	  };
 
-	  function change(d3_event, key) {
-	    var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+	  return mode;
+	}
 
-	    if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
+	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'
+	  })];
 
-	    if (newValue === 'none' || newValue === '') {
-	      newValue = undefined;
-	    }
+	  function enabled() {
+	    return osmEditable();
+	  }
 
-	    var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-	    var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
+	  function osmEditable() {
+	    return context.editable();
+	  }
 
-	    if (otherValue && Array.isArray(otherValue)) {
-	      // we must always have an explicit value for comparison
-	      otherValue = otherValue[0];
-	    }
+	  modes.forEach(function (mode) {
+	    context.keybinding().on(mode.key, function () {
+	      if (!enabled()) return;
 
-	    if (otherValue === 'none' || otherValue === '') {
-	      otherValue = undefined;
-	    }
+	      if (mode.id === context.mode().id) {
+	        context.enter(modeBrowse(context));
+	      } else {
+	        context.enter(mode);
+	      }
+	    });
+	  });
 
-	    var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
-	    // sides the same way
+	  tool.render = function (selection) {
+	    var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-	    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 debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	    dispatch$1.call('change', this, tag);
-	  }
+	    context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+	    context.on('enter.modes', update);
+	    update();
 
-	  cycleway.options = function () {
-	    return Object.keys(field.strings.options).map(function (option) {
-	      return {
-	        title: field.t('options.' + option + '.description'),
-	        value: option
-	      };
-	    });
-	  };
+	    function update() {
+	      var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+	        return d.id;
+	      }); // exit
 
-	  cycleway.tags = function (tags) {
-	    _tags = tags; // If cycleway is set, use that instead of individual values
+	      buttons.exit().remove(); // enter
 
-	    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 = [];
+	      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
 
-	        if (Array.isArray(tags.cycleway)) {
-	          vals = vals.concat(tags.cycleway);
-	        }
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	        if (Array.isArray(tags[d])) {
-	          vals = vals.concat(tags[d]);
+	        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
 
-	        return vals.filter(Boolean).join('\n');
-	      }
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
 
-	      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]);
-	    });
+	      buttons = buttons.merge(buttonsEnter).attr('aria-disabled', function (d) {
+	        return !enabled();
+	      }).classed('disabled', function (d) {
+	        return !enabled();
+	      }).attr('aria-pressed', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
 	  };
 
-	  cycleway.focus = function () {
-	    var node = wrap.selectAll('input').node();
-	    if (node) node.focus();
+	  return tool;
+	}
+
+	function uiToolNotes(context) {
+	  var tool = {
+	    id: 'notes',
+	    label: _t.html('modes.add_note.label')
 	  };
+	  var mode = modeAddNote(context);
 
-	  return utilRebind(cycleway, dispatch$1, 'on');
-	}
+	  function enabled() {
+	    return notesEnabled() && notesEditable();
+	  }
 
-	function uiFieldLanes(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var LANE_WIDTH = 40;
-	  var LANE_HEIGHT = 200;
-	  var _entityIDs = [];
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
 
-	  function lanes(selection) {
-	    var lanesData = context.entity(_entityIDs[0]).lanes();
+	  function notesEditable() {
+	    var mode = context.mode();
+	    return context.map().notesEditable() && mode && mode.id !== 'save';
+	  }
 
-	    if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-	      selection.call(lanes.off);
-	      return;
+	  context.keybinding().on(mode.key, function () {
+	    if (!enabled()) return;
+
+	    if (mode.id === context.mode().id) {
+	      context.enter(modeBrowse(context));
+	    } else {
+	      context.enter(mode);
 	    }
+	  });
 
-	    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';
+	  tool.render = function (selection) {
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
 	    });
-	  }
 
-	  lanes.entityIDs = function (val) {
-	    _entityIDs = val;
-	  };
+	    context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+	    context.on('enter.notes', update);
+	    update();
 
-	  lanes.tags = function () {};
+	    function update() {
+	      var showNotes = notesEnabled();
+	      var data = showNotes ? [mode] : [];
+	      var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+	        return d.id;
+	      }); // exit
 
-	  lanes.focus = function () {};
+	      buttons.exit().remove(); // enter
 
-	  lanes.off = function () {};
+	      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
 
-	  return utilRebind(lanes, dispatch$1, 'on');
-	}
-	uiFieldLanes.supportsMultiselection = false;
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	var _languagesArray = [];
-	function uiFieldLocalized(field, context) {
-	  var dispatch$1 = dispatch('change', 'input');
-	  var wikipedia = services.wikipedia;
-	  var input = select(null);
-	  var localizedInputs = select(null);
+	        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
 
-	  var _countryCode;
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
 
-	  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.
 
+	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+	        return !enabled();
+	      }).attr('aria-disabled', function (d) {
+	        return !enabled();
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      }).attr('aria-pressed', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
+	  };
 
-	  _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
-	    /* ignore */
-	  });
-	  var _territoryLanguages = {};
-	  _mainFileFetcher.get('territory_languages').then(function (d) {
-	    _territoryLanguages = d;
-	  })["catch"](function () {
-	    /* ignore */
-	  });
-	  var allSuggestions = _mainPresetIndex.collection.filter(function (p) {
-	    return p.suggestion === true;
-	  }); // reuse these combos
+	  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);
+	  };
 
-	  var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
-	  var brandCombo = uiCombobox(context, 'localized-brand').canAutocomplete(false).minItems(1);
+	  return tool;
+	}
 
-	  var _selection = select(null);
+	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;
 
-	  var _multilingual = [];
+	  function isSaving() {
+	    var mode = context.mode();
+	    return mode && mode.id === 'save';
+	  }
 
-	  var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
+	  function isDisabled() {
+	    return _numChanges === 0 || isSaving();
+	  }
 
-	  var _wikiTitles;
+	  function save(d3_event) {
+	    d3_event.preventDefault();
 
-	  var _entityIDs = [];
+	    if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+	      context.enter(modeSave(context));
+	    }
+	  }
 
-	  function loadLanguagesArray(dataLanguages) {
-	    if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
+	  function bgColor() {
+	    var step;
 
-	    var replacements = {
-	      sr: 'sr-Cyrl',
-	      // in OSM, `sr` implies Cyrillic
-	      'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
+	    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
+	    }
+	  }
 
-	    };
+	  function updateCount() {
+	    var val = history.difference().summary().length;
+	    if (val === _numChanges) return;
+	    _numChanges = val;
 
-	    for (var code in dataLanguages) {
-	      if (replacements[code] === false) continue;
-	      var metaCode = code;
-	      if (replacements[code]) metaCode = replacements[code];
+	    if (tooltipBehavior) {
+	      tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
+	    }
 
-	      _languagesArray.push({
-	        localName: _mainLocalizer.languageName(metaCode, {
-	          localOnly: true
-	        }),
-	        nativeName: dataLanguages[metaCode].nativeName,
-	        code: code,
-	        label: _mainLocalizer.languageName(metaCode)
-	      });
+	    if (button) {
+	      button.classed('disabled', isDisabled()).style('background', bgColor());
+	      button.select('span.count').text(_numChanges);
 	    }
 	  }
 
-	  function calcLocked() {
-	    // 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 entity = context.graph().hasEntity(entityID);
-	      if (!entity) return false;
+	  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);
+
+	      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'))();
+	      }
+
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    button.call(svgIcon('#iD-icon-save'));
+	    button.append('span').attr('class', 'count').attr('aria-hidden', 'true').text('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());
+
+	        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 tool;
+	}
 
-	      var original = context.graph().base().entities[_entityIDs[0]];
+	function uiToolSidebarToggle(context) {
+	  var tool = {
+	    id: 'sidebar_toggle',
+	    label: _t.html('toolbar.inspect')
+	  };
 
-	      var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name; // if the name was already edited manually then allow further editing
+	  tool.render = function (selection) {
+	    selection.append('button').attr('class', 'bar-button').attr('aria-label', _t('sidebar.tooltip')).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')));
+	  };
 
-	      if (!hasOriginalName) return false; // features linked to Wikidata are likely important and should be protected
+	  return tool;
+	}
 
-	      if (entity.tags.wikidata) return true; // assume the name has already been confirmed if its source has been researched
+	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')
+	  }];
 
-	      if (entity.tags['name:etymology:wikidata']) return true;
-	      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
+	  function editable() {
+	    return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+	    /* ignore min zoom */
+	    );
+	  }
 
-	      return isSuggestion && !showsBrand;
-	    });
+	  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();
 
-	    field.locked(isLocked);
-	  } // update _multilingual, maintaining the existing order
+	      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.html(d.id + '.tooltip', {
+	          action: annotation
+	        }) : _t.html(d.id + '.nothing');
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
+	      }
 
-	  function calcMultilingual(tags) {
-	    var existingLangsOrdered = _multilingual.map(function (item) {
-	      return item.lang;
+	      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();
 	    });
 
-	    var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	    for (var k in tags) {
-	      var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
+	    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);
 
-	      if (m && m[1] === field.key && m[2]) {
-	        var item = {
-	          lang: m[2],
-	          value: tags[k]
-	        };
+	    function update() {
+	      buttons.classed('disabled', function (d) {
+	        return !editable() || !d.annotation();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        if (existingLangs.has(item.lang)) {
-	          // update the value
-	          _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-	          existingLangs["delete"](item.lang);
-	        } else {
-	          _multilingual.push(item);
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
 	        }
-	      }
+	      });
 	    }
+	  };
 
-	    _multilingual = _multilingual.filter(function (item) {
-	      return !item.lang || !existingLangs.has(item.lang);
-	    });
+	  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);
+	  };
+
+	  return tool;
+	}
+
+	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 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());
-	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
+	  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;
+	      }
+	    });
 
-	    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
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	    input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+	    context.layers().on('change.topToolbar', debouncedUpdate);
+	    update();
 
-	    if (preset && field.id === 'name') {
-	      var pTag = preset.id.split('/', 2);
-	      var pKey = pTag[0];
-	      var pValue = pTag[1];
+	    function update() {
+	      var tools = [sidebarToggle, 'spacer', modes];
+	      tools.push('spacer');
 
-	      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);
-	        }); // Show the suggestions.. If the user picks one, change the tags..
+	      if (notesEnabled()) {
+	        tools = tools.concat([notes, 'spacer']);
+	      }
 
-	        if (allSuggestions.length && goodSuggestions.length) {
-	          input.on('blur.localized', checkBrandOnBlur).call(brandCombo.fetcher(fetchBrandNames(preset, allSuggestions)).on('accept', acceptBrand).on('cancel', cancelBrand));
+	      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;
+	      });
 	    }
+	  }
 
-	    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);
-
-	    if (_tags && !_multilingual.length) {
-	      calcMultilingual(_tags);
-	    }
+	  return topToolbar;
+	}
 
-	    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); // 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 uiZoomToSelection(context) {
+	  function isDisabled() {
+	    var mode = context.mode();
+	    return !mode || !mode.zoomToSelected;
+	  }
 
-	    function checkBrandOnBlur() {
-	      var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	      if (!latest) return; // deleting the entity blurred the field?
+	  var _lastPointerUpType;
 
-	      var preset = _mainPresetIndex.match(latest, context.graph());
-	      if (preset && preset.suggestion) return; // already accepted
+	  function pointerup(d3_event) {
+	    _lastPointerUpType = d3_event.pointerType;
+	  }
 
-	      var name = utilGetSetValue(input).trim();
-	      var matched = allSuggestions.filter(function (s) {
-	        return name === s.name();
-	      });
+	  function click(d3_event) {
+	    d3_event.preventDefault();
 
-	      if (matched.length === 1) {
-	        acceptBrand({
-	          suggestion: matched[0]
-	        });
-	      } else {
-	        cancelBrand();
+	    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'))();
 	      }
-	    }
-
-	    function acceptBrand(d) {
-	      var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	    } else {
+	      var mode = context.mode();
 
-	      if (!d || !entity) {
-	        cancelBrand();
-	        return;
+	      if (mode && mode.zoomToSelected) {
+	        mode.zoomToSelected();
 	      }
+	    }
 
-	      var tags = entity.tags;
-	      var geometry = entity.geometry(context.graph());
-	      var removed = preset.unsetTags(tags, geometry);
+	    _lastPointerUpType = null;
+	  }
 
-	      for (var k in tags) {
-	        tags[k] = removed[k]; // set removed tags to `undefined`
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
+	      if (isDisabled()) {
+	        return _t.html('inspector.zoom_to.no_selection');
 	      }
 
-	      tags = d.suggestion.setTags(tags, geometry);
-	      utilGetSetValue(input, tags.name);
-	      dispatch$1.call('change', this, tags);
-	    } // user hit escape
+	      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);
 
+	    function setEnabledState() {
+	      button.classed('disabled', isDisabled());
 
-	    function cancelBrand() {
-	      var name = utilGetSetValue(input);
-	      dispatch$1.call('change', this, {
-	        name: name
-	      });
+	      if (!button.select('.tooltip.in').empty()) {
+	        button.call(tooltipBehavior.updateContent);
+	      }
 	    }
 
-	    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 subtitle = s.subtitle();
-	            var name = s.name();
-	            if (subtitle) name += ' – ' + subtitle;
-	            var dist = utilEditDistance(value, name.substring(0, value.length));
-	            var matchesPreset = pKey === sKey && (!pValue || pValue === sValue);
-
-	            if (dist < 1 || matchesPreset && dist < 3) {
-	              var obj = {
-	                value: s.name(),
-	                title: name,
-	                display: s.nameLabel() + (subtitle ? ' – ' + s.subtitleLabel() : ''),
-	                suggestion: s,
-	                dist: dist + (matchesPreset ? 0 : 1) // penalize if not matched preset
+	    context.on('enter.uiZoomToSelection', setEnabledState);
+	    setEnabledState();
+	  };
+	}
+
+	function uiPane(id, context) {
+	  var _key;
 
-	              };
-	              results.push(obj);
-	            }
-	          }
+	  var _label = '';
+	  var _description = '';
+	  var _iconName = '';
 
-	          results.sort(function (a, b) {
-	            return a.dist - b.dist;
-	          });
-	        }
+	  var _sections; // array of uiSection objects
 
-	        results = results.slice(0, 10);
-	        callback(results);
-	      };
-	    }
 
-	    function addNew(d3_event) {
-	      d3_event.preventDefault();
-	      if (field.locked()) return;
-	      var defaultLang = _mainLocalizer.languageCode().toLowerCase();
+	  var _paneSelection = select(null);
 
-	      var langExists = _multilingual.find(function (datum) {
-	        return datum.lang === defaultLang;
-	      });
+	  var _paneTooltip;
 
-	      var isLangEn = defaultLang.indexOf('en') > -1;
+	  var pane = {
+	    id: id
+	  };
 
-	      if (isLangEn || langExists) {
-	        defaultLang = '';
-	        langExists = _multilingual.find(function (datum) {
-	          return datum.lang === defaultLang;
-	        });
-	      }
+	  pane.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = val;
+	    return pane;
+	  };
 
-	      if (!langExists) {
-	        // prepend the value so it appears at the top
-	        _multilingual.unshift({
-	          lang: defaultLang,
-	          value: ''
-	        });
+	  pane.key = function (val) {
+	    if (!arguments.length) return _key;
+	    _key = val;
+	    return pane;
+	  };
 
-	        localizedInputs.call(renderMultilingual);
-	      }
-	    }
+	  pane.description = function (val) {
+	    if (!arguments.length) return _description;
+	    _description = val;
+	    return pane;
+	  };
 
-	    function change(onInput) {
-	      return function (d3_event) {
-	        if (field.locked()) {
-	          d3_event.preventDefault();
-	          return;
-	        }
+	  pane.iconName = function (val) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = val;
+	    return pane;
+	  };
 
-	        var val = utilGetSetValue(select(this));
-	        if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+	  pane.sections = function (val) {
+	    if (!arguments.length) return _sections;
+	    _sections = val;
+	    return pane;
+	  };
 
-	        if (!val && Array.isArray(_tags[field.key])) return;
-	        var t = {};
-	        t[field.key] = val || undefined;
-	        dispatch$1.call('change', this, t, onInput);
-	      };
-	    }
-	  }
+	  pane.selection = function () {
+	    return _paneSelection;
+	  };
 
-	  function key(lang) {
-	    return field.key + ':' + lang;
+	  function hidePane() {
+	    context.ui().togglePanes();
 	  }
 
-	  function changeLang(d3_event, d) {
-	    var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
-
-	    var lang = utilGetSetValue(select(this)).toLowerCase();
+	  pane.togglePane = function (d3_event) {
+	    if (d3_event) d3_event.preventDefault();
 
-	    var language = _languagesArray.find(function (d) {
-	      return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
-	    });
+	    _paneTooltip.hide();
 
-	    if (language) lang = language.code;
+	    context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+	  };
 
-	    if (d.lang && d.lang !== lang) {
-	      tags[key(d.lang)] = undefined;
+	  pane.renderToggleButton = function (selection) {
+	    if (!_paneTooltip) {
+	      _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
 	    }
 
-	    var newKey = lang && context.cleanTagKey(key(lang));
-	    var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+	    selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+	  };
 
-	    if (newKey && value) {
-	      tags[newKey] = value;
-	    } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-	      tags[newKey] = _wikiTitles[d.lang];
+	  pane.renderContent = function (selection) {
+	    // override to fully customize content
+	    if (_sections) {
+	      _sections.forEach(function (section) {
+	        selection.call(section.render);
+	      });
 	    }
+	  };
 
-	    d.lang = lang;
-	    dispatch$1.call('change', this, tags);
-	  }
-
-	  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
+	  pane.renderPane = function (selection) {
+	    _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-	    if (!value && Array.isArray(d.value)) return;
-	    var t = {};
-	    t[key(d.lang)] = value;
-	    d.value = value;
-	    dispatch$1.call('change', this, t);
-	  }
+	    var heading = _paneSelection.append('div').attr('class', 'pane-heading');
 
-	  function fetchLanguages(value, cb) {
-	    var v = value.toLowerCase(); // show the user's language first
+	    heading.append('h2').html(_label);
+	    heading.append('button').attr('title', _t('icons.close')).on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-	    var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+	    _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-	    if (_countryCode && _territoryLanguages[_countryCode]) {
-	      langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+	    if (_key) {
+	      context.keybinding().on(_key, pane.togglePane);
 	    }
+	  };
 
-	    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
-	      };
-	    }));
-	  }
-
-	  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();
+	  return pane;
+	}
 
-	        if (!d.lang || !d.value) {
-	          _multilingual.splice(index, 1);
+	function uiSectionBackgroundDisplayOptions(context) {
+	  var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-	          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');
-	    });
-	    entries = entries.merge(entriesEnter);
-	    entries.order();
-	    entries.classed('present', function (d) {
-	      return d.lang && d.value;
-	    });
-	    utilGetSetValue(entries.select('.localized-lang'), function (d) {
-	      return _mainLocalizer.languageName(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);
-	    });
-	  }
+	  var _detected = utilDetect();
 
-	  localized.tags = function (tags) {
-	    _tags = tags; // Fetch translations from wikipedia
+	  var _storedOpacity = corePreferences('background-opacity');
 
-	    if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-	      _wikiTitles = {};
-	      var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+	  var _minVal = 0;
 
-	      if (wm && wm[0] && wm[1]) {
-	        wikipedia.translations(wm[1], wm[2], function (err, d) {
-	          if (err || !d) return;
-	          _wikiTitles = d;
-	        });
-	      }
-	    }
+	  var _maxVal = _detected.cssfilters ? 3 : 1;
 
-	    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);
+	  var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-	    _selection.call(localized);
+	  var _options = {
+	    brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+	    contrast: 1,
+	    saturation: 1,
+	    sharpness: 1
 	  };
 
-	  localized.focus = function () {
-	    input.node().focus();
-	  };
+	  function clamp(x, min, max) {
+	    return Math.max(min, Math.min(x, max));
+	  }
 
-	  localized.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    _multilingual = [];
-	    loadCountryCode();
-	    return localized;
-	  };
+	  function updateValue(d, val) {
+	    val = clamp(val, _minVal, _maxVal);
+	    _options[d] = val;
+	    context.background()[d](val);
 
-	  function loadCountryCode() {
-	    var extent = combinedEntityExtent();
-	    var countryCode = extent && iso1A2Code(extent.center());
-	    _countryCode = countryCode && countryCode.toLowerCase();
-	  }
+	    if (d === 'brightness') {
+	      corePreferences('background-opacity', val);
+	    }
 
-	  function combinedEntityExtent() {
-	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	    section.reRender();
 	  }
 
-	  return utilRebind(localized, dispatch$1, 'on');
-	}
+	  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
 
-	function uiFieldMaxspeed(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var unitInput = select(null);
-	  var input = select(null);
-	  var _entityIDs = [];
+	    var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('label').attr('class', function (d) {
+	      return 'display-control display-control-' + d;
+	    });
+	    slidersEnter.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');
 
-	  var _tags;
+	      if (!val && d3_event && d3_event.target) {
+	        val = d3_event.target.value;
+	      }
 
-	  var _isImperial;
+	      updateValue(d, val);
+	    });
+	    sildersControlEnter.append('button').attr('title', function (d) {
+	      return "".concat(_t('background.reset'), " ").concat(_t('background.' + d));
+	    }).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
 
-	  var speedCombo = uiCombobox(context, 'maxspeed');
-	  var unitCombo = uiCombobox(context, 'maxspeed-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];
+	    containerEnter.append('a').attr('class', 'display-option-resetlink').attr('role', 'button').attr('href', '#').call(_t.append('background.reset_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
 
-	  function maxspeed(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.maxspeed-number').data([0]);
-	    input = input.enter().append('input').attr('type', 'text').attr('class', 'maxspeed-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.maxspeed-unit').data([0]);
-	    unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'maxspeed-unit').call(unitCombo).merge(unitInput);
-	    unitInput.on('blur', changeUnits).on('change', changeUnits);
+	      for (var i = 0; i < _sliders.length; i++) {
+	        updateValue(_sliders[i], 1);
+	      }
+	    }); // update
 
-	    function changeUnits() {
-	      _isImperial = utilGetSetValue(unitInput) === 'mph';
-	      utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	      setUnitSuggestions();
-	      change();
+	    container = containerEnter.merge(container);
+	    container.selectAll('.display-option-input').property('value', function (d) {
+	      return _options[d];
+	    });
+	    container.selectAll('.display-option-value').text(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
+
+	    if (containerEnter.size() && _options.brightness !== 1) {
+	      context.background().brightness(_options.brightness);
 	    }
 	  }
 
-	  function setUnitSuggestions() {
-	    speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-	    utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	  }
+	  return section;
+	}
 
-	  function comboValues(d) {
-	    return {
-	      value: d.toString(),
-	      title: d.toString()
+	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').call(_t.append('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
 
-	  function change() {
-	    var tag = {};
-	    var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-	    if (!value && Array.isArray(_tags[field.key])) return;
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original template
 
-	    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');
-	    }
 
-	    dispatch$1.call('change', this, tag);
-	  }
+	    function clickCancel() {
+	      textSection.select('.field-template').property('value', _origSettings.template);
+	      corePreferences('background-custom-template', _origSettings.template);
+	      this.blur();
+	      modal.close();
+	    } // accept the current template
 
-	  maxspeed.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;
-	      }
+	    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);
 	    }
+	  }
 
-	    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);
-	  };
+	  return utilRebind(render, dispatch, 'on');
+	}
 
-	  maxspeed.focus = function () {
-	    input.node().focus();
-	  };
+	function uiSectionBackgroundList(context) {
+	  var _backgroundList = select(null);
 
-	  maxspeed.entityIDs = function (val) {
-	    _entityIDs = val;
-	  };
+	  var _customSource = context.background().findSource('custom');
 
-	  function combinedEntityExtent() {
-	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	  }
+	  var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-	  return utilRebind(maxspeed, dispatch$1, 'on');
-	}
+	  var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
 
-	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
+	  function previousBackgroundID() {
+	    return corePreferences('background-last-used-toggle');
+	  }
 
-	  var typeField;
-	  var layerField;
-	  var _oldType = {};
-	  var _entityIDs = [];
+	  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
 
-	  function selectedKey() {
-	    var node = wrap.selectAll('.form-field-input-radio label.active input');
-	    return !node.empty() && node.datum();
-	  }
+	    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').call(_t.append('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').call(_t.append('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').call(_t.append('background.location_panel.description')); // "Info / Report a Problem" link
 
-	  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
-	      });
+	    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').call(_t.append('background.imagery_problem_faq'));
+
+	    _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+	      chooseBackground(d);
+	    }, function (d) {
+	      return !d.isHidden() && !d.overlay;
 	    });
-	    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
+	  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 (type) {
-	      if (!typeField || typeField.id !== selected) {
-	        typeField = uiField(context, type, _entityIDs, {
-	          wrap: false
-	        }).on('change', changeType);
+	      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()));
 	      }
+	    });
+	  }
 
-	      typeField.tags(tags);
-	    } else {
-	      typeField = null;
-	    }
-
-	    var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+	  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;
-	    }); // Exit
-
-	    typeItem.exit().remove(); // Enter
-
-	    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
-
-	    typeItem = typeItem.merge(typeEnter);
-
-	    if (typeField) {
-	      typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
-	    } // Layer
+	    }).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);
+	  }
 
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
 
-	    if (layer && showLayer) {
-	      if (!layerField) {
-	        layerField = uiField(context, layer, _entityIDs, {
-	          wrap: false
-	        }).on('change', changeLayer);
-	      }
+	    selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+	      return d.id === previousBackgroundID();
+	    }).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
-	      layerField.tags(tags);
-	      field.keys = utilArrayUnion(field.keys, ['layer']);
-	    } else {
-	      layerField = null;
-	      field.keys = field.keys.filter(function (k) {
-	        return k !== 'layer';
-	      });
+	  function chooseBackground(d) {
+	    if (d.id === 'custom' && !d.template()) {
+	      return editCustom();
 	    }
 
-	    var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
-
-	    layerItem.exit().remove(); // Enter
+	    var previousBackground = context.background().baseLayerSource();
+	    corePreferences('background-last-used-toggle', previousBackground.id);
+	    corePreferences('background-last-used', d.id);
+	    context.background().baseLayerSource(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
+	  function customChanged(d) {
+	    if (d && d.template) {
+	      _customSource.template(d.template);
 
-	    layerItem = layerItem.merge(layerEnter);
+	      chooseBackground(_customSource);
+	    } else {
+	      _customSource.template('');
 
-	    if (layerField) {
-	      layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+	      chooseBackground(context.background().findSource('none'));
 	    }
 	  }
 
-	  function changeType(t, onInput) {
-	    var key = selectedKey();
-	    if (!key) return;
-	    var val = t[key];
-
-	    if (val !== 'no') {
-	      _oldType[key] = val;
-	    }
+	  function editCustom() {
+	    context.container().call(_settingsCustomBackground);
+	  }
 
-	    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
+	  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;
+	}
 
+	function uiSectionBackgroundOffset(context) {
+	  var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-	      if (t.layer === undefined) {
-	        if (key === 'bridge' && val !== 'no') {
-	          t.layer = '1';
-	        }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-	          t.layer = '-1';
-	        }
-	      }
-	    }
+	  var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
 
-	    dispatch$1.call('change', this, t, onInput);
+	  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;
+	    });
 	  }
 
-	  function changeLayer(t, onInput) {
-	    if (t.layer === '0') {
-	      t.layer = undefined;
-	    }
+	  function resetOffset() {
+	    context.background().offset([0, 0]);
+	    updateValue();
+	  }
 
-	    dispatch$1.call('change', this, t, onInput);
+	  function nudge(d) {
+	    context.background().nudge(d, context.map().zoom());
+	    updateValue();
 	  }
 
-	  function changeRadio() {
-	    var t = {};
-	    var activeKey;
+	  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 (field.key) {
-	      t[field.key] = undefined;
+	    if (d.length !== 2 || !d[0] || !d[1]) {
+	      input.classed('error', true);
+	      return;
 	    }
 
-	    radios.each(function (d) {
-	      var active = select(this).property('checked');
-	      if (active) activeKey = d;
+	    context.background().offset(geoMetersToOffset(d));
+	    updateValue();
+	  }
 
-	      if (field.key) {
-	        if (active) t[field.key] = d;
-	      } else {
-	        var val = _oldType[activeKey] || 'yes';
-	        t[d] = active ? val : undefined;
-	      }
-	    });
+	  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 (field.type === 'structureRadio') {
-	      if (activeKey === 'bridge') {
-	        t.layer = '1';
-	      } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
-	        t.layer = '-1';
-	      } else {
-	        t.layer = undefined;
-	      }
+	    if (_pointerPrefix === 'pointer') {
+	      select(window).on('pointercancel.drag-bg-offset', pointerup);
 	    }
 
-	    dispatch$1.call('change', this, t);
-	  }
+	    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);
+	    }
 
-	  radio.tags = function (tags) {
-	    radios.property('checked', function (d) {
-	      if (field.key) {
-	        return tags[field.key] === 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);
+	    }
+	  }
 
-	      return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+	  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').call(_t.append('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').attr('aria-label', _t('background.offset_label')).on('change', inputOffset);
+	    nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('title', function (d) {
+	      return _t("background.nudge.".concat(d[0]));
+	    }).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();
+	  }
 
-	    function isMixed(d) {
-	      if (field.key) {
-	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-	      }
-
-	      return Array.isArray(tags[d]);
-	    }
+	  context.background().on('change.backgroundOffset-update', updateValue);
+	  return section;
+	}
 
-	    labels.classed('active', function (d) {
-	      if (field.key) {
-	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
-	      }
+	function uiSectionOverlayList(context) {
+	  var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-	      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;
-	    });
+	  var _overlayList = select(null);
 
-	    if (selection.empty()) {
-	      placeholder.html(_t.html('inspector.none'));
-	    } else {
-	      placeholder.html(selection.attr('value'));
-	      _oldType[selection.datum()] = tags[selection.datum()];
-	    }
+	  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 (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';
+	      if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.name()));
 	      }
+	    });
+	  }
 
-	      wrap.call(structureExtras, tags);
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
 	    }
-	  };
 
-	  radio.focus = function () {
-	    radios.node().focus();
-	  };
+	    selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
-	  radio.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    _oldType = {};
-	    return radio;
-	  };
+	  function chooseOverlay(d3_event, d) {
+	    d3_event.preventDefault();
+	    context.background().toggleOverlayLayer(d);
 
-	  radio.isAllowed = function () {
-	    return _entityIDs.length === 1;
-	  };
+	    _overlayList.call(updateLayerSelections);
 
-	  return utilRebind(radio, dispatch$1, 'on');
-	}
+	    document.activeElement.blur();
+	  }
 
-	function uiFieldRestrictions(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var breathe = behaviorBreathe();
-	  corePreferences('turn-restriction-via-way', null); // remove old key
+	  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);
 
-	  var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
+	    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;
+	    }
+	  }
 
-	  var storedDistance = corePreferences('turn-restriction-distance');
+	  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);
 
-	  var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
+	    _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+	      return !d.isHidden() && d.overlay;
+	    });
+	  }
 
-	  var _maxDistance = storedDistance ? +storedDistance : 30;
+	  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;
+	}
 
-	  var _initialized = false;
+	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;
+	}
 
-	  var _parent = select(null); // the entire field
+	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 _container = select(null); // just the map
+	      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');
 
-	  var _oldTurns;
+	  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('');
 
-	  var _graph;
+	      if (rtl) {
+	        nav.call(drawNext).call(drawPrevious);
+	      } else {
+	        nav.call(drawPrevious).call(drawNext);
+	      }
 
-	  var _vertexID;
+	      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'));
+	        }
+	      }
 
-	  var _intersection;
+	      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);
+	        }
+	      }
+	    }
 
-	  var _fromWayID;
+	    function clickWalkthrough(d3_event) {
+	      d3_event.preventDefault();
+	      if (context.inIntro()) return;
+	      context.container().call(uiIntro(context));
+	      context.ui().togglePanes();
+	    }
 
-	  var _lastXPos;
+	    function clickShortcuts(d3_event) {
+	      d3_event.preventDefault();
+	      context.container().call(context.ui().shortcuts, true);
+	    }
 
-	  function restrictions(selection) {
-	    _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
+	    var toc = content.append('ul').attr('class', 'toc');
+	    var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('role', 'button').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').call(_t.append('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').call(_t.append('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);
+	  };
 
-	    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.
+	  return helpPane;
+	}
 
+	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.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('issues.' + severity + 's.list_title')
+	      },
+	      count: issueCountText
+	    });
+	  }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
+	    return _issues && _issues.length;
+	  });
 
-	    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
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  } // get and cache the issues to display, unordered
 
-	    select(selection.node().parentNode).classed('hide', !isOK); // 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;
-	    }
+	  function reloadIssues() {
+	    _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+	  }
 
-	    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
+	  function renderDisclosureContent(selection) {
+	    var center = context.map().center();
+	    var graph = context.graph(); // sort issues by distance away from the center of the map
 
-	    var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
-	    containerEnter.append('div').attr('class', 'restriction-help'); // update
+	    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
 
-	    _container = containerEnter.merge(container).call(renderViewer);
-	    var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-	    controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+	    issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
+
+	    selection.call(drawIssuesList, issues);
 	  }
 
-	  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 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
 
-	    selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
-	      var val = select(this).property('value');
-	      _maxDistance = +val;
-	      _intersection = null;
+	    items.exit().remove(); // Enter
 
-	      _container.selectAll('.layer-osm .layer-turns *').remove();
+	    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
 
-	      corePreferences('turn-restriction-distance', _maxDistance);
+	    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')
+	        .call(t.append('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();
+	        });
+	    */
+	  }
 
-	      _parent.call(restrictions);
+	  context.validator().on('validated.uiSectionValidationIssues' + id, function () {
+	    window.requestIdleCallback(function () {
+	      reloadIssues();
+	      section.reRender();
 	    });
-	    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
+	  });
+	  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
 
-	    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();
+	      section.reRender();
+	    });
+	  }, 1000));
+	  return section;
+	}
 
-	      corePreferences('turn-restriction-via-way0', _maxViaWay);
+	function uiSectionValidationOptions(context) {
+	  var section = uiSection('issues-options', context).content(renderContent);
 
-	      _parent.call(restrictions);
+	  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);
 	    });
-	    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);
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      // 'all', 'edited'
+	      where: corePreferences('validate-where') || 'all' // 'all', 'visible'
 
-	    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
+	    };
+	  }
 
-	    var extent = geoExtent();
+	  function updateOptionValue(d3_event, d, val) {
+	    if (!val && d3_event && d3_event.target) {
+	      val = d3_event.target.value;
+	    }
 
-	    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
+	    corePreferences('validate-' + d, val);
+	    context.validator().validate();
+	  }
 
+	  return section;
+	}
 
-	    if (_intersection.vertices.length > 1) {
-	      var padding = 180; // in z22 pixels
+	function uiSectionValidationRules(context) {
+	  var MINSQUARE = 0;
+	  var MAXSQUARE = 20;
+	  var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-	      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));
-	    }
+	  var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
 
-	    var padTop = 35; // reserve top space for hint text
+	  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('role', 'button').attr('href', '#').call(_t.append('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules(_ruleKeys);
+	    });
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules([]);
+	    }); // Update
+
+	    container = container.merge(containerEnter);
+	    container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+	  }
 
-	    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);
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	    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.
+	    items.exit().remove(); // Enter
 
+	    var enter = items.enter().append('li');
 
-	    if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-	      _fromWayID = null;
-	      _oldTurns = null;
+	    if (name === 'rule') {
+	      enter.call(uiTooltip().title(function (d) {
+	        return _t.html('issues.' + d + '.tip');
+	      }).placement('top'));
 	    }
 
-	    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;
+	    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 (_fromWayID) {
-	      way = vgraph.entity(_fromWayID);
-	      surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
-	    }
+	      if (d === 'unsquare_way') {
+	        params.val = {
+	          html: '<span class="square-degrees"></span>'
+	        };
+	      }
 
-	    document.addEventListener('resizeWindow', function () {
-	      utilSetDimensions(_container, null);
-	      redraw(1);
-	    }, false);
-	    updateHints(null);
+	      return _t.html('issues.' + d + '.title', params);
+	    }); // Update
 
-	    function click(d3_event) {
-	      surface.call(breathe.off).call(breathe);
-	      var datum = d3_event.target.__data__;
-	      var entity = datum && datum.properties && datum.properties.entity;
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-	      if (entity) {
-	        datum = entity;
-	      }
+	    var degStr = corePreferences('validate-square-degrees');
 
-	      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 (degStr === null) {
+	      degStr = DEFAULTSQUARE.toString();
+	    }
 
-	        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 span = items.selectAll('.square-degrees');
+	    var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
 
-	          datumOnly.only = true; // but change this property
+	    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);
+	  }
 
-	          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.
+	  function changeSquare() {
+	    var input = select(this);
+	    var degStr = utilGetSetValue(input).trim();
+	    var degNum = parseFloat(degStr, 10);
 
-	          turns = _intersection.turns(_fromWayID, 2);
-	          extraActions = [];
-	          _oldTurns = [];
+	    if (!isFinite(degNum)) {
+	      degNum = DEFAULTSQUARE;
+	    } else if (degNum > MAXSQUARE) {
+	      degNum = MAXSQUARE;
+	    } else if (degNum < MINSQUARE) {
+	      degNum = MINSQUARE;
+	    }
 
-	          for (i = 0; i < turns.length; i++) {
-	            var turn = turns[i];
-	            if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
+	    degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
 
-	            if (turn.direct && turn.path[1] === datum.path[1]) {
-	              seen[turns[i].restrictionID] = true;
-	              turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
+	    degStr = degNum.toString();
+	    input.property('value', degStr);
+	    corePreferences('validate-square-degrees', degStr);
+	    context.validator().revalidateUnsquare();
+	  }
 
-	              _oldTurns.push(turn);
+	  function isRuleEnabled(d) {
+	    return context.validator().isRuleEnabled(d);
+	  }
 
-	              extraActions.push(actionUnrestrictTurn(turn));
-	            }
-	          }
+	  function toggleRule(d3_event, d) {
+	    context.validator().toggleRule(d);
+	  }
 
-	          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 = [];
+	  context.validator().on('validated.uiSectionValidationRules', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  return section;
+	}
 
-	          for (i = 0; i < turns.length; i++) {
-	            if (turns[i].key !== datum.key) {
-	              extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-	            }
-	          }
+	function uiSectionValidationStatus(context) {
+	  var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+	    var issues = context.validator().getIssues(getOptions());
+	    return issues.length === 0;
+	  });
 
-	          _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')]);
-	        }
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  }
 
-	        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 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);
+	  }
 
-	        var s = surface.selectAll('.' + datum.key);
-	        datum = s.empty() ? null : s.datum();
-	        updateHints(datum);
-	      } else {
-	        _fromWayID = null;
-	        _oldTurns = null;
-	        redraw();
-	      }
-	    }
+	  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
 
-	    function mouseover(d3_event) {
-	      var datum = d3_event.target.__data__;
-	      updateHints(datum);
-	    }
+	    resetIgnored.exit().remove(); // enter
 
-	    _lastXPos = _lastXPos || sdims[0];
+	    var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+	    resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-	    function redraw(minChange) {
-	      var xPos = -1;
+	    resetIgnored = resetIgnored.merge(resetIgnoredEnter);
+	    resetIgnored.select('a').html(_t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('issues.reset_ignored')
+	      },
+	      count: ignoredIssues.length
+	    }));
+	    resetIgnored.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().resetIgnoredIssues();
+	    });
+	  }
 
-	      if (minChange) {
-	        xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-	      }
+	  function setNoIssuesText(selection) {
+	    var opts = getOptions();
 
-	      if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
-	        if (context.hasEntity(_vertexID)) {
-	          _lastXPos = xPos;
+	    function checkForHiddenIssues(cases) {
+	      for (var type in cases) {
+	        var hiddenOpts = cases[type];
+	        var hiddenIssues = context.validator().getIssues(hiddenOpts);
 
-	          _container.call(renderViewer);
+	        if (hiddenIssues.length) {
+	          selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.' + type, {
+	            count: hiddenIssues.length.toString()
+	          }));
+	          return;
 	        }
 	      }
+
+	      selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.none'));
 	    }
 
-	    function highlightPathsFrom(wayID) {
-	      surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
-	      surface.selectAll('.' + wayID).classed('related', true);
+	    var messageType;
 
-	      if (wayID) {
-	        var turns = _intersection.turns(wayID, _maxViaWay);
+	    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'
+	        }
+	      });
+	    } 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'
+	        }
+	      });
+	    } 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') {
+	      messageType = 'everything';
+	      checkForHiddenIssues({
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    }
 
-	        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';
+	    if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+	      messageType = 'no_edits';
+	    }
 
-	          if (turn.only || turns.length === 1) {
-	            if (turn.via.ways) {
-	              ids = ids.concat(turn.via.ways);
-	            }
-	          } else if (turn.to.way === wayID) {
-	            continue;
-	          }
+	    selection.select('.box .message').html('').call(_t.append('issues.no_issues.message.' + messageType));
+	  }
 
-	          surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
-	        }
-	      }
-	    }
+	  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 updateHints(datum) {
-	      var help = _container.selectAll('.restriction-help').html('');
+	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;
+	}
 
-	      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;
+	function uiSettingsCustomData(context) {
+	  var dispatch = dispatch$8('change');
 
-	      if (entity) {
-	        datum = entity;
-	      }
+	  function render(selection) {
+	    var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
 
-	      if (_fromWayID) {
-	        way = vgraph.entity(_fromWayID);
-	        surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
-	      } // Hovering a way
+	    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').call(_t.append('settings.custom_data.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    textSection.append('pre').attr('class', 'instructions-file').call(_t.append('settings.custom_data.file.instructions'));
+	    textSection.append('input').attr('class', 'field-file').attr('type', 'file').attr('accept', '.gpx,.kml,.geojson,.json,application/gpx+xml,application/vnd.google-earth.kml+xml,application/geo+json,application/json').property('files', _currSettings.fileList) // works for all except IE11
+	    .on('change', function (d3_event) {
+	      var files = d3_event.target.files;
 
-	      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 (files && files.length) {
+	        _currSettings.url = '';
+	        textSection.select('.field-url').property('value', '');
+	        _currSettings.fileList = files;
+	      } else {
+	        _currSettings.fileList = null;
+	      }
+	    });
+	    textSection.append('h4').call(_t.append('settings.custom_data.or'));
+	    textSection.append('pre').attr('class', 'instructions-url').call(_t.append('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
 
-	        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 buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-	        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 isSaveDisabled() {
+	      return null;
+	    } // restore the original url
 
-	        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 clickCancel() {
+	      textSection.select('.field-url').property('value', _origSettings.url);
+	      corePreferences('settings-custom-data-url', _origSettings.url);
+	      this.blur();
+	      modal.close();
+	    } // accept the current url
 
-	          help.append('div') // "VIA {viaNames}"
-	          .html(_t.html('restriction.help.via_names', {
-	            via: placeholders.via,
-	            viaNames: names.join(', ')
-	          }));
-	        }
 
-	        if (!indirect) {
-	          help.append('div') // Click for "No Right Turn"
-	          .html(_t.html('restriction.help.toggle', {
-	            turn: nextText.trim()
-	          }));
-	        }
+	    function clickSave() {
+	      _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-	        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);
+	      if (_currSettings.url) {
+	        _currSettings.fileList = null;
+	      }
 
-	        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
-	          }));
-	        }
+	      if (_currSettings.fileList) {
+	        _currSettings.url = '';
 	      }
+
+	      corePreferences('settings-custom-data-url', _currSettings.url);
+	      this.blur();
+	      modal.close();
+	      dispatch.call('change', this, _currSettings);
 	    }
 	  }
 
-	  function displayMaxDistance(maxDist) {
-	    var isImperial = !_mainLocalizer.usesMetric();
-	    var opts;
+	  return utilRebind(render, dispatch, 'on');
+	}
+
+	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);
+
+	  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);
+	  }
+
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	    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
-	        })
-	      };
+	    if (layer) {
+	      return layer.enabled();
 	    }
 
-	    return _t.html('restriction.controls.distance_up_to', opts);
+	    return false;
 	  }
 
-	  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');
-	  }
+	  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);
 
-	  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 (layer) {
+	      layer.enabled(enabled);
+
+	      if (!enabled && (which === 'osm' || which === 'notes')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 	  }
 
-	  restrictions.entityIDs = function (val) {
-	    _intersection = null;
-	    _fromWayID = null;
-	    _oldTurns = null;
-	    _vertexID = val[0];
-	  };
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
+	  }
 
-	  restrictions.tags = function () {};
+	  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
 
-	  restrictions.focus = function () {};
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
+	  }
 
-	  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);
-	  };
+	  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
 
-	  return utilRebind(restrictions, dispatch$1, 'on');
-	}
-	uiFieldRestrictions.supportsMultiselection = false;
+	    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
 
-	function uiFieldTextarea(field, context) {
-	  var dispatch$1 = dispatch('change');
-	  var input = select(null);
 
-	  var _tags;
+	  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..
 
-	  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);
-	  }
+	    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').text('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').text('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').text(function (d) {
+	      return d.name;
+	    }); // Update
 
-	  function change(onInput) {
-	    return function () {
-	      var val = utilGetSetValue(input);
-	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+	    li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
 
-	      if (!val && Array.isArray(_tags[field.key])) return;
-	      var t = {};
-	      t[field.key] = val || undefined;
-	      dispatch$1.call('change', this, t, onInput);
-	    };
-	  }
+	    function isVTLayerSelected(d) {
+	      return dataLayer && dataLayer.template() === d.template;
+	    }
 
-	  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);
-	  };
+	    function selectVTLayer(d3_event, d) {
+	      corePreferences('settings-custom-data-url', d.template);
 
-	  textarea.focus = function () {
-	    input.node().focus();
-	  };
+	      if (dataLayer) {
+	        dataLayer.template(d.template, d.src);
+	        dataLayer.enabled(true);
+	      }
+	    }
+	  }
 
-	  return utilRebind(textarea, dispatch$1, 'on');
-	}
+	  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
 
-	function uiFieldWikidata(field, context) {
-	  var wikidata = services.wikidata;
-	  var dispatch$1 = dispatch('change');
+	    ul.exit().remove(); // Enter
 
-	  var _selection = select(null);
+	    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').call(_t.append('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
 
-	  var _searchInput = select(null);
+	    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 _qid = null;
-	  var _wikidataEntity = null;
-	  var _wikiURL = '';
-	  var _entityIDs = [];
+	  function editCustom() {
+	    context.container().call(settingsCustomData);
+	  }
 
-	  var _wikipediaKey = field.keys && field.keys.find(function (key) {
-	    return key.includes('wikipedia');
-	  }),
-	      _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+	  function customChanged(d) {
+	    var dataLayer = layers.layer('data');
 
-	  var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
+	    if (d && d.url) {
+	      dataLayer.url(d.url);
+	    } else if (d && d.fileList) {
+	      dataLayer.fileList(d.fileList);
+	    }
+	  }
 
-	  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();
+	  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');
 	    });
-	    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) {
+	    historyPanelLabelEnter.append('span').call(_t.append('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();
-	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	      context.ui().info.toggle('measurement');
 	    });
-	    searchRow = searchRow.merge(searchRowEnter);
-	    _searchInput = searchRow.select('input');
-	    var wikidataProperties = ['description', 'identifier'];
-	    var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter
+	    measurementPanelLabelEnter.append('span').call(_t.append('map_data.measurement_panel.title'));
+	  }
 
-	    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) {
+	  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;
+	}
+
+	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('role', 'button').attr('href', '#').call(_t.append('issues.disable_all')).on('click', function (d3_event) {
 	      d3_event.preventDefault();
-	      select(this.parentNode).select('input').node().select();
-	      document.execCommand('copy');
+	      context.features().disableAll();
 	    });
+	    footer.append('a').attr('class', 'feature-list-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().enableAll();
+	    }); // Update
+
+	    container = container.merge(containerEnter);
+	    container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
 	  }
 
-	  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 drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	        if (entity.tags[_hintKey]) {
-	          q = entity.tags[_hintKey];
-	          break;
-	        }
-	      }
-	    }
+	    items.exit().remove(); // Enter
 
-	    wikidata.itemsForSearchQuery(q, function (err, data) {
-	      if (err) return;
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      var tip = _t.html(name + '.' + d + '.tooltip');
 
-	      for (var i in data) {
-	        data[i].value = data[i].label + ' (' + data[i].id + ')';
-	        data[i].title = data[i].description;
+	      if (autoHiddenFeature(d)) {
+	        var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+	        tip += '<div>' + msg + '</div>';
 	      }
 
-	      if (callback) callback(data);
-	    });
+	      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
+
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
 	  }
 
-	  function change() {
-	    var syncTags = {};
-	    syncTags[field.key] = _qid;
-	    dispatch$1.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
+	  function autoHiddenFeature(d) {
+	    return context.features().autoHidden(d);
+	  }
 
-	    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 showsFeature(d) {
+	    return context.features().enabled(d);
+	  }
 
-	      if (context.graph() !== initGraph) return;
-	      if (!entity.sitelinks) return;
-	      var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
+	  function clickFeature(d3_event, d) {
+	    context.features().toggle(d);
+	  }
 
-	      ['labels', 'descriptions'].forEach(function (key) {
-	        if (!entity[key]) return;
-	        var valueLangs = Object.keys(entity[key]);
-	        if (valueLangs.length === 0) return;
-	        var valueLang = valueLangs[0];
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.enabled();
+	  } // add listeners
 
-	        if (langs.indexOf(valueLang) === -1) {
-	          langs.push(valueLang);
-	        }
-	      });
-	      var newWikipediaValue;
 
-	      if (_wikipediaKey) {
-	        var foundPreferred;
+	  context.features().on('change.map_features', section.reRender);
+	  return section;
+	}
 
-	        for (var i in langs) {
-	          var lang = langs[i];
-	          var siteID = lang.replace('-', '_') + 'wiki';
+	function uiSectionMapStyleOptions(context) {
+	  var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-	          if (entity.sitelinks[siteID]) {
-	            foundPreferred = true;
-	            newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
+	  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');
+	    });
+	  }
 
-	            break;
-	          }
-	        }
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	        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');
-	          });
+	    items.exit().remove(); // Enter
 
-	          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;
-	          }
-	        }
-	      }
+	    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
 
-	      if (newWikipediaValue) {
-	        newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-	      }
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
+	  }
 
-	      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 isActiveFill(d) {
+	    return context.map().activeAreaFill() === d;
+	  }
 
-	        if (newWikipediaValue === null) {
-	          if (!currTags[_wikipediaKey]) return null;
-	          delete currTags[_wikipediaKey];
-	        } else {
-	          currTags[_wikipediaKey] = newWikipediaValue;
-	        }
+	  function toggleHighlightEdited(d3_event) {
+	    d3_event.preventDefault();
+	    context.map().toggleHighlightEdited();
+	  }
 
-	        return actionChangeTags(entityID, currTags);
-	      }).filter(Boolean);
-	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+	  function setFill(d3_event, d) {
+	    context.map().activeAreaFill(d);
+	  }
 
-	      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
-	    });
+	  context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	  return section;
+	}
+
+	function uiSectionPhotoOverlays(context) {
+	  var layers = context.layers();
+	  var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  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);
 	  }
 
-	  function setLabelForEntity() {
-	    var label = '';
+	  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();
+	    });
 
-	    if (_wikidataEntity) {
-	      label = entityPropertyForDisplay(_wikidataEntity, 'labels');
+	    function layerSupported(d) {
+	      return d.layer && d.layer.supported();
+	    }
+
+	    function layerEnabled(d) {
+	      return layerSupported(d) && d.layer.enabled();
+	    }
+
+	    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 (label.length === 0) {
-	        label = _wikidataEntity.id.toString();
+	      if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+	        classes += ' indented';
 	      }
-	    }
 
-	    utilGetSetValue(_searchInput, label);
-	  }
+	      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 === 'kartaview') titleID = 'kartaview_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
 
-	  wiki.tags = function (tags) {
-	    var isMixed = Array.isArray(tags[field.key]);
+	    li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
+	  }
 
-	    _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
+	  function drawPhotoTypeItems(selection) {
+	    var data = context.photos().allPhotoTypes();
 
-	    _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+	    function typeEnabled(d) {
+	      return context.photos().showsPhotoType(d);
+	    }
 
-	    if (!/^Q[0-9]*$/.test(_qid)) {
-	      // not a proper QID
-	      unrecognized();
-	      return;
-	    } // QID value in correct format
+	    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);
+	  }
 
-	    _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-	    wikidata.entityByQID(_qid, function (err, entity) {
-	      if (err) {
-	        unrecognized();
-	        return;
-	      }
+	  function drawDateFilter(selection) {
+	    var data = context.photos().dateFilters();
 
-	      _wikidataEntity = entity;
-	      setLabelForEntity();
-	      var description = entityPropertyForDisplay(entity, 'descriptions');
+	    function filterEnabled(d) {
+	      return context.photos().dateFilterValue(d);
+	    }
 
-	      _selection.select('button.wiki-link').classed('disabled', false);
+	    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
 
-	      _selection.select('.preset-wikidata-description').style('display', function () {
-	        return description.length > 0 ? 'flex' : 'none';
-	      }).select('input').attr('value', description);
+	      li.selectAll('input').each(function (d) {
+	        utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	      });
+	    });
+	    li = li.merge(liEnter).classed('active', filterEnabled);
+	  }
 
-	      _selection.select('.preset-wikidata-identifier').style('display', function () {
-	        return entity.id ? 'flex' : 'none';
-	      }).select('input').attr('value', entity.id);
-	    }); // not a proper QID
+	  function drawUsernameFilter(selection) {
+	    function filterEnabled() {
+	      return context.photos().usernames();
+	    }
 
-	    function unrecognized() {
-	      _wikidataEntity = null;
-	      setLabelForEntity();
+	    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').call(_t.append('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);
 
-	      _selection.select('.preset-wikidata-description').style('display', 'none');
+	    function usernameValue() {
+	      var usernames = context.photos().usernames();
+	      if (usernames) return usernames.join('; ');
+	      return usernames;
+	    }
+	  }
 
-	      _selection.select('.preset-wikidata-identifier').style('display', 'none');
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
+	  }
 
-	      _selection.select('button.wiki-link').classed('disabled', true);
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	      if (_qid && _qid !== '') {
-	        _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-	      } else {
-	        _wikiURL = '';
-	      }
+	    if (layer) {
+	      return layer.enabled();
 	    }
-	  };
-
-	  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 false;
+	  }
 
+	  function setLayer(which, enabled) {
+	    var layer = layers.layer(which);
 
-	    return propObj[langKeys[0]].value;
+	    if (layer) {
+	      layer.enabled(enabled);
+	    }
 	  }
 
-	  wiki.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return wiki;
-	  };
-
-	  wiki.focus = function () {
-	    _searchInput.node().focus();
-	  };
+	  context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+	  context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	  return section;
+	}
 
-	  return utilRebind(wiki, dispatch$1, 'on');
+	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;
 	}
 
-	function uiFieldWikipedia(field, context) {
-	  var _arguments = arguments;
-	  var dispatch$1 = dispatch('change');
-	  var wikipedia = services.wikipedia;
-	  var wikidata = services.wikidata;
+	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;
+	}
 
-	  var _langInput = select(null);
+	function uiInit(context) {
+	  var _initCounter = 0;
+	  var _needWidth = {};
 
-	  var _titleInput = select(null);
+	  var _lastPointerType;
 
-	  var _wikiURL = '';
+	  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 _entityIDs;
+	      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
 
-	  var _tags;
+	      d3_event.preventDefault();
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
 
-	  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 = '';
+	    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();
+	      });
+	    }
 
-	      for (var i in _entityIDs) {
-	        var entity = context.hasEntity(_entityIDs[i]);
+	    if ('PointerEvent' in window) {
+	      select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+	        var pointerType = d3_event.pointerType || 'mouse';
 
-	        if (entity.tags.name) {
-	          value = entity.tags.name;
-	          break;
+	        if (_lastPointerType !== pointerType) {
+	          _lastPointerType = pointerType;
+	          container.attr('pointer', pointerType);
 	        }
-	      }
+	      }, true);
+	    } else {
+	      _lastPointerType = 'mouse';
+	      container.attr('pointer', 'mouse');
 	    }
 
-	    var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-	    searchfn(language()[2], value, function (query, data) {
-	      callback(data.map(function (d) {
-	        return {
-	          value: d
-	        };
-	      }));
-	    });
-	  });
+	    container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
 
-	  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);
+	    container.call(uiFullScreen(context));
+	    var map = context.map();
+	    map.redrawEnable(false); // don't draw until we've set zoom/lat/long
 
-	    _langInput.on('blur', changeLang).on('change', changeLang);
+	    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
 
-	    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);
+	    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.
 
-	    _titleInput.on('blur', blur).on('change', change);
+	    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 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 controlsWrap = overMap.append('div').attr('class', 'map-controls-wrap');
+	    var controls = controlsWrap.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));
+	    controlsWrap.on('wheel.mapControls', function (d3_event) {
+	      if (!d3_event.deltaX) {
+	        controlsWrap.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
 
-	  function defaultLanguageInfo(skipEnglishFallback) {
-	    var langCode = _mainLocalizer.languageCode().toLowerCase();
+	    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();
 
-	    for (var i in _dataWikipedia) {
-	      var d = _dataWikipedia[i]; // default to the language of iD's current locale
+	    if (apiConnections && apiConnections.length > 1) {
+	      aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
+	    }
 
-	      if (d[2] === langCode) return d;
-	    } // fallback to English
+	    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').attr('aria-label', _t('report_a_bug')).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').attr('aria-label', _t('help_translate')).call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
+	    aboutList.append('li').attr('class', 'version').call(uiVersion(context));
 
+	    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.
 
-	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
-	  }
 
-	  function language(skipEnglishFallback) {
-	    var value = utilGetSetValue(_langInput).toLowerCase();
+	    ui.onResize();
+	    map.redrawEnable(true);
+	    ui.hash = behaviorHash(context);
+	    ui.hash();
 
-	    for (var i in _dataWikipedia) {
-	      var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
+	    if (!ui.hash.hadHash) {
+	      map.centerZoom([0, 0], 2);
+	    } // Bind events
 
-	      if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
-	    } // fallback to English
 
+	    window.onbeforeunload = function () {
+	      return context.save();
+	    };
 
-	    return defaultLanguageInfo(skipEnglishFallback);
-	  }
+	    window.onunload = function () {
+	      context.history().unlock();
+	    };
 
-	  function changeLang() {
-	    utilGetSetValue(_langInput, language()[1]);
-	    change(true);
-	  }
+	    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();
+	      }
 
-	  function blur() {
-	    change(true);
-	  }
+	      var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
 
-	  function change(skipWikidata) {
-	    var value = utilGetSetValue(_titleInput);
-	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
+	      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
 
-	    var langInfo = m && _dataWikipedia.find(function (d) {
-	      return m[1] === d[2];
-	    });
+	      var mode = context.mode();
+	      if (mode && /^draw/.test(mode.id)) return;
+	      var layer = context.layers().layer('osm');
 
-	    var syncTags = {};
+	      if (layer) {
+	        layer.enabled(!layer.enabled());
 
-	    if (langInfo) {
-	      var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
+	        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));
 
-	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
+	    if (!_initCounter++) {
+	      if (!ui.hash.startWalkthrough) {
+	        context.container().call(uiSplash(context)).call(uiRestore(context));
+	      }
 
-	      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) {
+	      context.container().call(ui.shortcuts);
+	    }
 
-	        anchor = decodeURIComponent(m[3]); // }
+	    var osm = context.connection();
+	    var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-	        value += '#' + anchor.replace(/_/g, ' ');
-	      }
+	    if (osm && auth) {
+	      osm.on('authLoading.ui', function () {
+	        context.container().call(auth);
+	      }).on('authDone.ui', function () {
+	        auth.close();
+	      });
+	    }
 
-	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
-	      utilGetSetValue(_langInput, nativeLangName);
-	      utilGetSetValue(_titleInput, value);
+	    _initCounter++;
+
+	    if (ui.hash.startWalkthrough) {
+	      ui.hash.startWalkthrough = false;
+	      context.container().call(uiIntro(context));
 	    }
 
-	    if (value) {
-	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-	    } else {
-	      syncTags.wikipedia = undefined;
+	    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);
+	      };
 	    }
+	  }
 
-	    dispatch$1.call('change', this, syncTags);
-	    if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
+	  var ui = {};
 
-	    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.
+	  var _loadPromise; // renders the iD interface into the container node
 
-	      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
 
-	        if (currTags.wikidata !== value) {
-	          currTags.wikidata = value;
-	          return actionChangeTags(entityID, currTags);
-	        }
+	  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.
+
+
+	  ui.restart = function () {
+	    context.keybinding().clear();
+	    _loadPromise = null;
+	    context.container().selectAll('*').remove();
+	    ui.ensureLoaded();
+	  };
+
+	  ui.lastPointerType = function () {
+	    return _lastPointerType;
+	  };
+
+	  ui.svgDefs = svgDefs(context);
+	  ui.flash = uiFlash(context);
+	  ui.sidebar = uiSidebar(context);
+	  ui.photoviewer = uiPhotoviewer(context);
+	  ui.shortcuts = uiShortcuts(context);
 
-	        return null;
-	      }).filter(Boolean);
-	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+	  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.
 
-	      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 mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+	    utilGetDimensions(context.container().select('.sidebar'), true);
 
-	  wiki.tags = function (tags) {
-	    _tags = tags;
-	    updateForTags(tags);
-	  };
+	    if (withPan !== undefined) {
+	      map.redrawEnable(false);
+	      map.pan(withPan);
+	      map.redrawEnable(true);
+	    }
 
-	  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`
+	    map.dimensions(mapDimensions);
+	    ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
-	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-	    var tagLang = m && m[1];
-	    var tagArticleTitle = m && m[2];
-	    var anchor = m && m[3];
+	    ui.checkOverflow('.top-toolbar');
+	    ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
-	      return tagLang === d[2];
-	    }); // value in correct format
+	    var resizeWindowEvent = document.createEvent('Event');
+	    resizeWindowEvent.initEvent('resizeWindow', true, true);
+	    document.dispatchEvent(resizeWindowEvent);
+	  }; // Call checkOverflow when resizing or whenever the contents change.
 
 
-	    if (tagLangInfo) {
-	      var nativeLangName = tagLangInfo[1];
-	      utilGetSetValue(_langInput, nativeLangName);
-	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
+	  ui.checkOverflow = function (selector, reset) {
+	    if (reset) {
+	      delete _needWidth[selector];
+	    }
 
-	      if (anchor) {
-	        try {
-	          // Best-effort `anchorencode:` implementation
-	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-	        } catch (e) {
-	          anchor = anchor.replace(/ /g, '_');
-	        }
+	    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;
+
+	    if (scrollWidth > clientWidth) {
+	      // overflow happening
+	      selection.classed('narrow', true);
+
+	      if (!_needWidth[selector]) {
+	        _needWidth[selector] = scrollWidth;
 	      }
+	    } else if (scrollWidth >= needed) {
+	      selection.classed('narrow', false);
+	    }
+	  };
 
-	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
-	    } else {
-	      utilGetSetValue(_titleInput, value);
+	  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);
 
-	      if (value && value !== '') {
-	        utilGetSetValue(_langInput, '');
-	        var defaultLangInfo = defaultLanguageInfo();
-	        _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+	    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);
+
+	      if (hidePanes.empty()) {
+	        showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
 	      } else {
-	        var shownOrDefaultLangInfo = language(true
-	        /* skipEnglishFallback */
-	        );
-	        utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
-	        _wikiURL = '';
+	        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);
+	      });
 	    }
-	  }
-
-	  wiki.entityIDs = function (val) {
-	    if (!_arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return wiki;
 	  };
 
-	  wiki.focus = function () {
-	    _titleInput.node().focus();
+	  var _editMenu = uiEditMenu(context);
+
+	  ui.editMenu = function () {
+	    return _editMenu;
 	  };
 
-	  return utilRebind(wiki, dispatch$1, 'on');
-	}
-	uiFieldWikipedia.supportsMultiselection = false;
+	  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
 
-	var uiFields = {
-	  access: uiFieldAccess,
-	  address: uiFieldAddress,
-	  check: uiFieldCheck,
-	  combo: uiFieldCombo,
-	  cycleway: uiFieldCycleway,
-	  defaultCheck: uiFieldCheck,
-	  email: uiFieldText,
-	  identifier: uiFieldText,
-	  lanes: uiFieldLanes,
-	  localized: uiFieldLocalized,
-	  maxspeed: uiFieldMaxspeed,
-	  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
-	};
+	    if (!context.map().editableDataEnabled()) return;
+	    var surfaceNode = context.surface().node();
 
-	function uiField(context, presetField, entityIDs, options) {
-	  options = Object.assign({
-	    show: true,
-	    wrap: true,
-	    remove: true,
-	    revert: true,
-	    info: true
-	  }, options);
-	  var dispatch$1 = dispatch('change', 'revert');
-	  var field = Object.assign({}, presetField); // shallow copy
+	    if (surfaceNode.focus) {
+	      // FF doesn't support it
+	      // focus the surface or else clicking off the menu may not trigger modeBrowse
+	      surfaceNode.focus();
+	    }
 
-	  field.domId = utilUniqueDomId('form-field-' + field.safeid);
-	  var _show = options.show;
-	  var _state = '';
-	  var _tags = {};
-	  var _locked = false;
+	    operations.forEach(function (operation) {
+	      if (operation.point) operation.point(anchorPoint);
+	    });
 
-	  var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
-	    label: field.label
-	  })).placement('bottom');
+	    _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
 
-	  field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-	  if (_show && !field.impl) {
-	    createField();
-	  } // Creates the field.. This is done lazily,
-	  // once we know that the field will be shown.
+	    context.map().supersurface.call(_editMenu);
+	  };
 
+	  ui.closeEditMenu = function () {
+	    // remove any existing menu no matter how it was added
+	    context.map().supersurface.select('.edit-menu').remove();
+	  };
 
-	  function createField() {
-	    field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
-	      dispatch$1.call('change', field, t, onInput);
-	    });
+	  var _saveLoading = select(null);
 
-	    if (entityIDs) {
-	      field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
+	  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();
 
-	      if (field.impl.entityIDs) {
-	        field.impl.entityIDs(entityIDs);
-	      }
-	    }
-	  }
+	    _saveLoading = select(null);
+	  });
+	  return ui;
+	}
 
-	  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];
-	      });
-	    });
-	  }
+	function coreContext() {
+	  var _this = this;
 
-	  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 dispatch = dispatch$8('enter', 'exit', 'change');
+	  var context = utilRebind({}, dispatch, 'on');
 
-	        return false;
-	      }
+	  var _deferred = new Set();
 
-	      return _tags[key] !== undefined;
-	    });
-	  }
+	  context.version = '2.20.4';
+	  context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
 
-	  function revert(d3_event, d) {
-	    d3_event.stopPropagation();
-	    d3_event.preventDefault();
-	    if (!entityIDs || _locked) return;
-	    dispatch$1.call('revert', d, d.keys);
-	  }
+	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+	  /* Changeset */
+	  // An osmChangeset object. Not loaded until needed.
 
-	  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$1.call('change', d, t);
-	  }
+	  context.changeset = null;
+	  var _defaultChangesetComment = context.initialHashParams.comment;
+	  var _defaultChangesetSource = context.initialHashParams.source;
+	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
 
-	  field.render = function (selection) {
-	    var container = selection.selectAll('.form-field').data([field]); // Enter
+	  context.defaultChangesetComment = function (val) {
+	    if (!arguments.length) return _defaultChangesetComment;
+	    _defaultChangesetComment = val;
+	    return context;
+	  };
 
-	    var enter = container.enter().append('div').attr('class', function (d) {
-	      return 'form-field form-field-' + d.safeid;
-	    }).classed('nowrap', !options.wrap);
+	  context.defaultChangesetSource = function (val) {
+	    if (!arguments.length) return _defaultChangesetSource;
+	    _defaultChangesetSource = val;
+	    return context;
+	  };
 
-	    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');
+	  context.defaultChangesetHashtags = function (val) {
+	    if (!arguments.length) return _defaultChangesetHashtags;
+	    _defaultChangesetHashtags = val;
+	    return context;
+	  };
+	  /* Document title */
 
-	      if (options.remove) {
-	        labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
-	      }
+	  /* (typically shown as the label for the browser window/tab) */
+	  // If true, iD will update the title based on what the user is doing
 
-	      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 _setsDocumentTitle = true;
 
-	    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);
+	  context.setsDocumentTitle = function (val) {
+	    if (!arguments.length) return _setsDocumentTitle;
+	    _setsDocumentTitle = val;
+	    return context;
+	  }; // The part of the title that is always the same
 
-	      if (!d.impl) {
-	        createField();
-	      }
 
-	      var reference, help; // instantiate field help
+	  var _documentTitleBase = document.title;
 
-	      if (options.wrap && field.type === 'restrictions') {
-	        help = uiFieldHelp(context, 'restrictions');
-	      } // instantiate tag reference
+	  context.documentTitleBase = function (val) {
+	    if (!arguments.length) return _documentTitleBase;
+	    _documentTitleBase = val;
+	    return context;
+	  };
+	  /* User interface and keybinding */
 
 
-	      if (options.wrap && options.info) {
-	        var referenceKey = d.key || '';
+	  var _ui;
 
-	        if (d.type === 'multiCombo') {
-	          // lookup key without the trailing ':'
-	          referenceKey = referenceKey.replace(/:$/, '');
-	        }
+	  context.ui = function () {
+	    return _ui;
+	  };
 
-	        reference = uiTagReference(d.reference || {
-	          key: referenceKey
-	        });
+	  context.lastPointerType = function () {
+	    return _ui.lastPointerType();
+	  };
 
-	        if (_state === 'hover') {
-	          reference.showing(false);
-	        }
-	      }
+	  var _keybinding = utilKeybinding('context');
 
-	      selection.call(d.impl); // add field help components
+	  context.keybinding = function () {
+	    return _keybinding;
+	  };
 
-	      if (help) {
-	        selection.call(help.body).select('.field-label').call(help.button);
-	      } // add tag reference components
+	  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;
 
-	      if (reference) {
-	        selection.call(reference.body).select('.field-label').call(reference.button);
-	      }
+	  var _history;
 
-	      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
+	  var _validator;
 
-	    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);
+	  var _uploader;
+
+	  context.connection = function () {
+	    return _connection;
 	  };
 
-	  field.state = function (val) {
-	    if (!arguments.length) return _state;
-	    _state = val;
-	    return field;
+	  context.history = function () {
+	    return _history;
 	  };
 
-	  field.tags = function (val) {
-	    if (!arguments.length) return _tags;
-	    _tags = val;
+	  context.validator = function () {
+	    return _validator;
+	  };
 
-	    if (tagsContainFieldKey() && !_show) {
-	      // always show a field if it has a value to display
-	      _show = true;
+	  context.uploader = function () {
+	    return _uploader;
+	  };
+	  /* Connection */
 
-	      if (!field.impl) {
-	        createField();
-	      }
+
+	  context.preauth = function (options) {
+	    if (_connection) {
+	      _connection["switch"](options);
 	    }
 
-	    return field;
+	    return context;
 	  };
+	  /* connection options for source switcher (optional) */
 
-	  field.locked = function (val) {
-	    if (!arguments.length) return _locked;
-	    _locked = val;
-	    return field;
-	  };
 
-	  field.show = function () {
-	    _show = true;
+	  var _apiConnections;
 
-	    if (!field.impl) {
-	      createField();
-	    }
+	  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
 
-	    if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
-	      var t = {};
-	      t[field.key] = field["default"];
-	      dispatch$1.call('change', this, t);
-	    }
-	  }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
+	  context.locale = function (locale) {
+	    if (!arguments.length) return _mainLocalizer.localeCode();
+	    _mainLocalizer.preferredLocaleCodes(locale);
+	    return context;
+	  };
+
+	  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();
+	          }
+	        }
 
-	  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
+	        if (typeof callback === 'function') {
+	          callback(err);
+	        }
 
+	        return;
+	      } else if (_connection && _connection.getConnectionId() !== cid) {
+	        if (typeof callback === 'function') {
+	          callback({
+	            message: 'Connection Switched',
+	            status: -1
+	          });
+	        }
 
-	  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;
+	        return;
+	      } else {
+	        _history.merge(result.data, result.extent);
 
-	    if (field.countryCodes || field.notCountryCodes) {
-	      var extent = combinedEntityExtent();
-	      if (!extent) return true;
-	      var center = extent.center();
-	      var countryCode = iso1A2Code(center);
-	      if (!countryCode) return false;
-	      countryCode = countryCode.toLowerCase();
+	        if (typeof callback === 'function') {
+	          callback(err, result);
+	        }
 
-	      if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-	        return false;
+	        return;
 	      }
+	    };
+	  }
 
-	      if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-	        return false;
-	      }
-	    }
+	  context.loadTiles = function (projection, callback) {
+	    var handle = window.requestIdleCallback(function () {
+	      _deferred["delete"](handle);
 
-	    var prerequisiteTag = field.prerequisiteTag;
+	      if (_connection && context.editableDataEnabled()) {
+	        var cid = _connection.getConnectionId();
 
-	    if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-	    prerequisiteTag) {
-	      if (!entityIDs.every(function (entityID) {
-	        var entity = context.graph().entity(entityID);
+	        _connection.loadTiles(projection, afterLoad(cid, callback));
+	      }
+	    });
 
-	        if (prerequisiteTag.key) {
-	          var value = entity.tags[prerequisiteTag.key];
-	          if (!value) return false;
+	    _deferred.add(handle);
+	  };
 
-	          if (prerequisiteTag.valueNot) {
-	            return prerequisiteTag.valueNot !== value;
-	          }
+	  context.loadTileAtLoc = function (loc, callback) {
+	    var handle = window.requestIdleCallback(function () {
+	      _deferred["delete"](handle);
 
-	          if (prerequisiteTag.value) {
-	            return prerequisiteTag.value === value;
-	          }
-	        } else if (prerequisiteTag.keyNot) {
-	          if (entity.tags[prerequisiteTag.keyNot]) return false;
-	        }
+	      if (_connection && context.editableDataEnabled()) {
+	        var cid = _connection.getConnectionId();
+
+	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+	      }
+	    });
 
-	        return true;
-	      })) return false;
-	    }
+	    _deferred.add(handle);
+	  }; // Download the full entity and its parent relations. The callback may be called multiple times.
 
-	    return true;
-	  };
 
-	  field.focus = function () {
-	    if (field.impl) {
-	      field.impl.focus();
+	  context.loadEntity = function (entityID, callback) {
+	    if (_connection) {
+	      var cid = _connection.getConnectionId();
+
+	      _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.
+
+
+	      _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
 	    }
 	  };
 
-	  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());
-	  }
-
-	  return utilRebind(field, dispatch$1, 'on');
-	}
+	  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;
 
-	function uiFormFields(context) {
-	  var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-	  var _fieldsArr = [];
-	  var _lastPlaceholder = '';
-	  var _state = '';
-	  var _klass = '';
+	      if (zoomTo !== false) {
+	        var entity = result.data.find(function (e) {
+	          return e.id === entityID;
+	        });
 
-	  function formFields(selection) {
-	    var allowedFields = _fieldsArr.filter(function (field) {
-	      return field.isAllowed();
+	        if (entity) {
+	          _map.zoomTo(entity);
+	        }
+	      }
 	    });
 
-	    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
+	    _map.on('drawn.zoomToEntity', function () {
+	      if (!context.hasEntity(entityID)) return;
 
-	    var enter = fields.enter().append('div').attr('class', function (d) {
-	      return 'wrap-form-field wrap-form-field-' + d.safeid;
-	    }); // Update
+	      _map.on('drawn.zoomToEntity', null);
 
-	    fields = fields.merge(enter);
-	    fields.order().each(function (d) {
-	      select(this).call(d.render);
+	      context.on('enter.zoomToEntity', null);
+	      context.enter(modeSelect(context, [entityID]));
 	    });
-	    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
-	      };
+
+	    context.on('enter.zoomToEntity', function () {
+	      if (_mode.id !== 'browse') {
+	        _map.on('drawn.zoomToEntity', null);
+
+	        context.on('enter.zoomToEntity', null);
+	      }
 	    });
-	    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
+	  var _minEditableZoom = 16;
 
-	      field.focus();
-	    })); // avoid updating placeholder excessively (triggers style recalc)
+	  context.minEditableZoom = function (val) {
+	    if (!arguments.length) return _minEditableZoom;
+	    _minEditableZoom = val;
 
-	    if (_lastPlaceholder !== placeholder) {
-	      input.attr('placeholder', placeholder);
-	      _lastPlaceholder = placeholder;
+	    if (_connection) {
+	      _connection.tileZoom(val);
 	    }
-	  }
 
-	  formFields.fieldsArr = function (val) {
-	    if (!arguments.length) return _fieldsArr;
-	    _fieldsArr = val || [];
-	    return formFields;
+	    return context;
+	  }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+
+
+	  context.maxCharsForTagKey = function () {
+	    return 255;
 	  };
 
-	  formFields.state = function (val) {
-	    if (!arguments.length) return _state;
-	    _state = val;
-	    return formFields;
+	  context.maxCharsForTagValue = function () {
+	    return 255;
 	  };
 
-	  formFields.klass = function (val) {
-	    if (!arguments.length) return _klass;
-	    _klass = val;
-	    return formFields;
+	  context.maxCharsForRelationRole = function () {
+	    return 255;
 	  };
 
-	  return formFields;
-	}
+	  function cleanOsmString(val, maxChars) {
+	    // be lenient with input
+	    if (val === undefined || val === null) {
+	      val = '';
+	    } else {
+	      val = val.toString();
+	    } // remove whitespace
 
-	function uiSectionPresetFields(context) {
-	  var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
-	  var dispatch$1 = dispatch('change', 'revert');
-	  var formFields = uiFormFields(context);
 
-	  var _state;
+	    val = val.trim(); // use the canonical form of the string
 
-	  var _fieldsArr;
+	    if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
 
-	  var _presets = [];
+	    return utilUnicodeCharsTruncated(val, maxChars);
+	  }
 
-	  var _tags;
+	  context.cleanTagKey = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagKey());
+	  };
 
-	  var _entityIDs;
+	  context.cleanTagValue = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagValue());
+	  };
 
-	  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;
+	  context.cleanRelationRole = function (val) {
+	    return cleanOsmString(val, context.maxCharsForRelationRole());
+	  };
+	  /* History */
 
-	      _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 _inIntro = false;
 
-	      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]);
+	  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
 
-	      if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-	        _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
-	      }
 
-	      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
-	          }));
-	        }
-	      });
+	  context.save = function () {
+	    // no history save, no message onbeforeunload
+	    if (_inIntro || context.container().select('.modal').size()) return;
+	    var canSave;
 
-	      _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 (_mode && _mode.id === 'save') {
+	      canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
 
-	    _fieldsArr.forEach(function (field) {
-	      field.state(_state).tags(_tags);
-	    });
+	      if (services.osm && services.osm.isChangesetInflight()) {
+	        _history.clearSaved();
 
-	    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));
+	        return;
 	      }
-	    });
-	  }
+	    } else {
+	      canSave = context.selectedIDs().every(function (id) {
+	        var entity = context.hasEntity(id);
+	        return entity && !entity.isDegenerate();
+	      });
+	    }
 
-	  section.presets = function (val) {
-	    if (!arguments.length) return _presets;
+	    if (canSave) {
+	      _history.save();
+	    }
 
-	    if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-	      _presets = val;
-	      _fieldsArr = null;
+	    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).
 
-	    return section;
+
+	  context.debouncedSave = debounce(context.save, 350);
+
+	  function withDebouncedSave(fn) {
+	    return function () {
+	      var result = fn.apply(_history, arguments);
+	      context.debouncedSave();
+	      return result;
+	    };
+	  }
+	  /* Graph */
+
+
+	  context.hasEntity = function (id) {
+	    return _history.graph().hasEntity(id);
 	  };
 
-	  section.state = function (val) {
-	    if (!arguments.length) return _state;
-	    _state = val;
-	    return section;
+	  context.entity = function (id) {
+	    return _history.graph().entity(id);
 	  };
+	  /* Modes */
 
-	  section.tags = function (val) {
-	    if (!arguments.length) return _tags;
-	    _tags = val; // Don't reset _fieldsArr here.
 
-	    return section;
+	  var _mode;
+
+	  context.mode = function () {
+	    return _mode;
 	  };
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
+	  context.enter = function (newMode) {
+	    if (_mode) {
+	      _mode.exit();
 
-	    if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-	      _entityIDs = val;
-	      _fieldsArr = null;
+	      dispatch.call('exit', _this, _mode);
 	    }
 
-	    return section;
+	    _mode = newMode;
+
+	    _mode.enter();
+
+	    dispatch.call('enter', _this, _mode);
 	  };
 
-	  return utilRebind(section, dispatch$1, 'on');
-	}
+	  context.selectedIDs = function () {
+	    return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+	  };
 
-	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;
+	  context.activeID = function () {
+	    return _mode && _mode.activeID && _mode.activeID();
+	  };
 
-	  var _entityIDs;
+	  var _selectedNoteID;
 
-	  var _maxMembers = 1000;
+	  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
 
-	  function downloadMember(d3_event, d) {
-	    d3_event.preventDefault(); // display the loading indicator
 
-	    select(this.parentNode).classed('tag-reference-loading', true);
-	    context.loadEntity(d.id, function () {
-	      section.reRender();
-	    });
-	  }
+	  var _selectedErrorID;
 
-	  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
+	  context.selectedErrorID = function (errorID) {
+	    if (!arguments.length) return _selectedErrorID;
+	    _selectedErrorID = errorID;
+	    return context;
+	  };
+	  /* Behaviors */
 
-	    utilHighlightEntities([d.id], true, context);
-	  }
 
-	  function selectMember(d3_event, d) {
-	    d3_event.preventDefault(); // remove the hover-highlight styling
+	  context.install = function (behavior) {
+	    return context.surface().call(behavior);
+	  };
 
-	    utilHighlightEntities([d.id], false, context);
-	    var entity = context.entity(d.id);
-	    var mapExtent = context.map().extent();
+	  context.uninstall = function (behavior) {
+	    return context.surface().call(behavior.off);
+	  };
+	  /* Copy/Paste */
 
-	    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]));
-	  }
+	  var _copyGraph;
 
-	  function changeRole(d3_event, d) {
-	    var oldRole = d.role;
-	    var newRole = context.cleanRelationRole(select(this).property('value'));
+	  context.copyGraph = function () {
+	    return _copyGraph;
+	  };
 
-	    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();
-	    }
-	  }
+	  var _copyIDs = [];
 
-	  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
-	    }));
+	  context.copyIDs = function (val) {
+	    if (!arguments.length) return _copyIDs;
+	    _copyIDs = val;
+	    _copyGraph = _history.graph();
+	    return context;
+	  };
 
-	    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();
-	    }
-	  }
+	  var _copyLonLat;
 
-	  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);
+	  context.copyLonLat = function (val) {
+	    if (!arguments.length) return _copyLonLat;
+	    _copyLonLat = val;
+	    return context;
+	  };
+	  /* Background */
 
-	      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
+	  var _background;
 
+	  context.background = function () {
+	    return _background;
+	  };
+	  /* Features */
 
-	    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;
-	          }
+	  var _features;
+
+	  context.features = function () {
+	    return _features;
+	  };
 
-	          return 'translateY(-100%)';
-	        } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
-	          if (targetIndex === null || index2 < targetIndex) {
-	            targetIndex = index2;
-	          }
+	  context.hasHiddenConnections = function (id) {
+	    var graph = _history.graph();
 
-	          return 'translateY(100%)';
-	        }
+	    var entity = graph.entity(id);
+	    return _features.hasHiddenConnections(entity, graph);
+	  };
+	  /* Photos */
 
-	        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();
-	      }
-	    }));
+	  var _photos;
 
-	    function bindTypeahead(d) {
-	      var row = select(this);
-	      var role = row.selectAll('input.member-role');
-	      var origValue = role.property('value');
+	  context.photos = function () {
+	    return _photos;
+	  };
+	  /* Map */
 
-	      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]);
-	          }
-	        }
+	  var _map;
 
-	        return sameletter.concat(other);
-	      }
+	  context.map = function () {
+	    return _map;
+	  };
 
-	      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;
+	  context.layers = function () {
+	    return _map.layers();
+	  };
 
-	        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';
-	        }
+	  context.surface = function () {
+	    return _map.surface;
+	  };
 
-	        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);
-	      }));
-	    }
+	  context.editableDataEnabled = function () {
+	    return _map.editableDataEnabled();
+	  };
 
-	    function unbind() {
-	      var row = select(this);
-	      row.selectAll('input.member-role').call(uiCombobox.off, context);
-	    }
-	  }
+	  context.surfaceRect = function () {
+	    return _map.surface.node().getBoundingClientRect();
+	  };
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return section;
+	  context.editable = function () {
+	    // don't allow editing during save
+	    var mode = context.mode();
+	    if (!mode || mode.id === 'save') return false;
+	    return _map.editableDataEnabled();
 	  };
+	  /* Debug */
 
-	  return section;
-	}
 
-	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;
-	    });
+	  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
 
-	    for (var i in memberIndexes) {
-	      graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
-	    }
+	  };
 
-	    return graph;
+	  context.debugFlags = function () {
+	    return _debugFlags;
 	  };
-	}
 
-	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 (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 = [];
+	  context.getDebug = function (flag) {
+	    return flag && _debugFlags[flag];
+	  };
 
-	  var _showBlank;
+	  context.setDebug = function (flag, val) {
+	    if (arguments.length === 1) val = true;
+	    _debugFlags[flag] = val;
+	    dispatch.call('change');
+	    return context;
+	  };
+	  /* Container */
 
-	  var _maxMemberships = 1000;
 
-	  function getSharedParentRelations() {
-	    var parents = [];
+	  var _container = select(null);
 
-	    for (var i = 0; i < _entityIDs.length; i++) {
-	      var entity = context.graph().hasEntity(_entityIDs[i]);
-	      if (!entity) continue;
+	  context.container = function (val) {
+	    if (!arguments.length) return _container;
+	    _container = val;
 
-	      if (i === 0) {
-	        parents = context.graph().parentRelations(entity);
-	      } else {
-	        parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
-	      }
+	    _container.classed('ideditor', true);
 
-	      if (!parents.length) break;
-	    }
+	    return context;
+	  };
 
-	    return parents;
-	  }
+	  context.containerNode = function (val) {
+	    if (!arguments.length) return context.container().node();
+	    context.container(select(val));
+	    return context;
+	  };
 
-	  function getMemberships() {
-	    var memberships = [];
-	    var relations = getSharedParentRelations().slice(0, _maxMemberships);
-	    var isMultiselect = _entityIDs.length > 1;
-	    var i, relation, membership, index, member, indexedMember;
+	  var _embed;
 
-	    for (i = 0; i < relations.length; i++) {
-	      relation = relations[i];
-	      membership = {
-	        relation: relation,
-	        members: [],
-	        hash: osmEntity.key(relation)
-	      };
+	  context.embed = function (val) {
+	    if (!arguments.length) return _embed;
+	    _embed = val;
+	    return context;
+	  };
+	  /* Assets */
 
-	      for (index = 0; index < relation.members.length; index++) {
-	        member = relation.members[index];
 
-	        if (_entityIDs.indexOf(member.id) !== -1) {
-	          indexedMember = Object.assign({}, member, {
-	            index: index
-	          });
-	          membership.members.push(indexedMember);
-	          membership.hash += ',' + index.toString();
+	  var _assetPath = '';
 
-	          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)
-	            };
-	          }
-	        }
-	      }
+	  context.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    _mainFileFetcher.assetPath(val);
+	    return context;
+	  };
 
-	      if (membership.members.length) memberships.push(membership);
-	    }
+	  var _assetMap = {};
 
-	    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;
-	  }
+	  context.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    _mainFileFetcher.assetMap(val);
+	    return context;
+	  };
 
-	  function selectRelation(d3_event, d) {
-	    d3_event.preventDefault(); // remove the hover-highlight styling
+	  context.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
+	  };
 
-	    utilHighlightEntities([d.relation.id], false, context);
-	    context.enter(modeSelect(context, [d.relation.id]));
-	  }
+	  context.imagePath = function (val) {
+	    return context.asset("img/".concat(val));
+	  };
+	  /* reset (aka flush) */
 
-	  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
 
-	    utilHighlightEntities([d.relation.id], true, context);
-	  }
+	  context.reset = context.flush = function () {
+	    context.debouncedSave.cancel();
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	  function changeRole(d3_event, d) {
-	    if (d === 0) return; // called on newrow (shouldn't happen)
+	      _deferred["delete"](handle);
+	    });
+	    Object.values(services).forEach(function (service) {
+	      if (service && typeof service.reset === 'function') {
+	        service.reset(context);
+	      }
+	    });
+	    context.changeset = null;
 
-	    if (_inChange) return; // avoid accidental recursive call #5731
+	    _validator.reset();
 
-	    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;
-	    });
+	    _features.reset();
 
-	    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();
-	    }
+	    _history.reset();
 
-	    _inChange = false;
-	  }
+	    _uploader.reset(); // don't leave stale state in the inspector
 
-	  function addMembership(d, role) {
-	    this.blur(); // avoid keeping focus on the button
 
-	    _showBlank = false;
+	    context.container().select('.inspector-wrap *').remove();
+	    return context;
+	  };
+	  /* Projections */
 
-	    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);
-	        }
 
-	        return graph;
-	      };
-	    }
+	  context.projection = geoRawMercator();
+	  context.curtainProjection = geoRawMercator();
+	  /* Init */
 
-	    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`
+	  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.
 
-	      context.enter(modeSelect(context, [relation.id]).newFeature(true));
-	    }
-	  }
+	    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 deleteMembership(d3_event, d) {
-	    this.blur(); // avoid keeping focus on the button
 
-	    if (d === 0) return; // called on newrow (shouldn't happen)
-	    // remove the hover-highlight styling
+	    function initializeDependents() {
+	      if (context.initialHashParams.presets) {
+	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
+	      }
 
-	    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();
-	  }
+	      if (context.initialHashParams.locale) {
+	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+	      } // kick off some async work
 
-	  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();
 
-	    function baseDisplayLabel(entity) {
-	      var matched = _mainPresetIndex.match(entity, graph);
-	      var presetName = matched && matched.name() || _t('inspector.relation');
-	      var entityName = utilDisplayName(entity) || '';
-	      return presetName + ' ' + entityName;
-	    }
+	      _mainLocalizer.ensureLoaded();
 
-	    var explicitRelation = q && context.hasEntity(q.toLowerCase());
+	      _background.ensureLoaded();
 
-	    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
-	        });
+	      _mainPresetIndex.ensureLoaded();
+	      Object.values(services).forEach(function (service) {
+	        if (service && typeof service.init === 'function') {
+	          service.init();
+	        }
 	      });
-	      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;
-	        });
-	      });
-	    }
+	      _map.init();
 
-	    result.forEach(function (obj) {
-	      obj.title = obj.value;
-	    });
-	    result.unshift(newRelation);
-	    callback(result);
-	  }
+	      _validator.init();
 
-	  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
+	      _features.init();
 
-	    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 (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
 
-	    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);
+	      if (!context.container().empty()) {
+	        _ui.ensureLoaded().then(function () {
+	          _photos.init();
+	        });
+	      }
 	    }
+	  };
 
-	    var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+	  return context;
+	}
 
-	    newMembership.exit().remove(); // Enter
+	// NSI contains the most correct tagging for many commonly mapped features.
+	// See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
+	// DATA
 
-	    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
+	var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'
 
-	    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 _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.
 
-	    var addRow = selection.selectAll('.add-row').data([0]); // enter
+	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 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
+	var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes
 
-	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-	    // update
+	var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
+	// `setNsiSources()`
+	// Adds the sources to iD's filemap so we can start downloading data.
+	//
 
-	    addRow = addRow.merge(addRowEnter);
-	    addRow.select('.add-relation').on('click', function () {
-	      _showBlank = true;
-	      section.reRender();
-	      list.selectAll('.member-entity-input').node().focus();
+	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 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 acceptEntity(d) {
-	      if (!d) {
-	        cancelEntity();
-	        return;
-	      } // remove hover-higlighting
 
+	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)
 
-	      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);
-	    }
+	    };
+	    _nsi.matcher = new Matcher();
 
-	    function cancelEntity() {
-	      var input = newMembership.selectAll('.member-entity-input');
-	      input.property('value', ''); // remove hover-higlighting
+	    _nsi.matcher.buildMatchIndex(_nsi.data);
 
-	      context.surface().selectAll('.highlighted').classed('highlighted', false);
-	    }
+	    _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());
 
-	    function bindTypeahead(d) {
-	      var row = select(this);
-	      var role = row.selectAll('input.member-role');
-	      var origValue = role.property('value');
+	    Object.keys(_nsi.data).forEach(function (tkv) {
+	      var category = _nsi.data[tkv];
+	      var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-	      function sort(value, data) {
-	        var sameletter = [];
-	        var other = [];
+	      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"
+	      // }
 
-	        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 vmap = _nsi.kvt.get(k);
 
-	        return sameletter.concat(other);
+	      if (!vmap) {
+	        vmap = new Map();
+
+	        _nsi.kvt.set(k, vmap);
 	      }
 
-	      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);
-	      }));
-	    }
+	      vmap.set(v, t);
+	      var tree = _nsi.trees[t]; // e.g. "brands", "operators"
 
-	    function unbind() {
-	      var row = select(this);
-	      row.selectAll('input.member-role').call(uiCombobox.off, context);
-	    }
-	  }
+	      var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    _showBlank = false;
-	    return section;
-	  };
+	      var items = category.items || [];
+	      items.forEach(function (item) {
+	        // Remember some useful things for later, cache NSI id -> item
+	        item.tkv = tkv;
+	        item.mainTag = mainTag;
 
-	  return section;
-	}
+	        _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416
 
-	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
+
+	        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);
+	      });
 	    });
-	  }).disclosureContent(renderDisclosureContent);
-	  context.history().on('change.selectionList', function (difference) {
-	    if (difference) {
-	      section.reRender();
-	    }
 	  });
+	} // `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()
+	//   }
+	//
 
-	  section.entityIDs = function (val) {
-	    if (!arguments.length) return _selectedIDs;
-	    _selectedIDs = val;
-	    return section;
-	  };
 
-	  function selectEntity(d3_event, entity) {
-	    context.enter(modeSelect(context, [entity.id]));
-	  }
+	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
 
-	  function deselectEntity(d3_event, entity) {
-	    d3_event.stopPropagation();
+	    if (osmkey === 'route_master') osmkey = 'route';
 
-	    var selectedIDs = _selectedIDs.slice();
+	    var vmap = _nsi.kvt.get(osmkey);
 
-	    var index = selectedIDs.indexOf(entity.id);
+	    if (!vmap) return; // not an interesting key
 
-	    if (index > -1) {
-	      selectedIDs.splice(index, 1);
-	      context.enter(modeSelect(context, selectedIDs));
+	    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
 	    }
-	  }
+	  }); // 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"
 
-	  function renderDisclosureContent(selection) {
-	    var list = selection.selectAll('.feature-list').data([0]);
-	    list = list.enter().append('div').attr('class', 'feature-list').merge(list);
+	  var preset = _mainPresetIndex.matchTags(tags, 'area');
 
-	    var entities = _selectedIDs.map(function (id) {
-	      return context.hasEntity(id);
-	    }).filter(Boolean);
+	  if (buildingPreset[preset.id]) {
+	    alternate.add('building/yes');
+	  }
 
-	    var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
-	    items.exit().remove(); // Enter
+	  return {
+	    primary: primary,
+	    alternate: alternate
+	  };
+	} // `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
+	//
 
-	    var enter = items.enter().append('button').attr('class', 'feature-list-item').on('click', selectEntity);
-	    enter.each(function (d) {
-	      select(this).on('mouseover', function () {
-	        utilHighlightEntities([d.id], true, context);
-	      });
-	      select(this).on('mouseout', function () {
-	        utilHighlightEntities([d.id], false, context);
-	      });
-	    });
-	    var label = enter.append('div').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());
-	    });
-	    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);
-	    });
-	  }
+	function identifyTree(tags) {
+	  var unknown;
+	  var t; // Check all tags
 
-	  return section;
-	}
+	  Object.keys(tags).forEach(function (osmkey) {
+	    if (t) return; // found already
 
-	function uiEntityEditor(context) {
-	  var dispatch$1 = dispatch('choose');
-	  var _state = 'select';
-	  var _coalesceChanges = false;
-	  var _modified = false;
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-	  var _base;
+	    if (osmkey === 'route_master') osmkey = 'route';
 
-	  var _entityIDs;
+	    var vmap = _nsi.kvt.get(osmkey);
 
-	  var _activePresets = [];
+	    if (!vmap) return; // this key is not in nsi
 
-	  var _newFeature;
+	    if (osmvalue === 'yes') {
+	      unknown = 'unknown';
+	    } else {
+	      t = vmap.get(osmvalue);
+	    }
+	  });
+	  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()
+	//   }
+	//
 
-	  var _sections;
 
-	  function entityEditor(selection) {
-	    var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
+	function gatherNames(tags) {
+	  var empty = {
+	    primary: new Set(),
+	    alternate: new Set()
+	  };
+	  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,
 
-	    var header = selection.selectAll('.header').data([0]); // Enter
+	  var t = identifyTree(tags);
+	  if (!t) return empty;
 
-	    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
+	  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
 
-	    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$1.call('choose', this, _activePresets);
-	    }); // Body
+	    };
+	  } else if (t === 'brands') {
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+)$/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"]
 
-	    var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-	    var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
+	  if (tags.name && testNameFragments) {
+	    var nameParts = tags.name.split(/[\s\-\/,.]/);
 
-	    body = body.merge(bodyEnter);
+	    for (var split = nameParts.length; split > 0; split--) {
+	      var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-	    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)];
+	      primary.add(name);
 	    }
+	  } // Check all tags
 
-	    _sections.forEach(function (section) {
-	      if (section.entityIDs) {
-	        section.entityIDs(_entityIDs);
-	      }
 
-	      if (section.presets) {
-	        section.presets(_activePresets);
-	      }
+	  Object.keys(tags).forEach(function (osmkey) {
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return;
 
-	      if (section.tags) {
-	        section.tags(combinedTags);
+	    if (isNamelike(osmkey, 'primary')) {
+	      if (/;/.test(osmvalue)) {
+	        foundSemi = true;
+	      } else {
+	        primary.add(osmvalue);
+	        alternate["delete"](osmvalue);
 	      }
-
-	      if (section.state) {
-	        section.state(_state);
+	    } else if (!primary.has(osmvalue) && isNamelike(osmkey, 'alternate')) {
+	      if (/;/.test(osmvalue)) {
+	        foundSemi = true;
+	      } else {
+	        alternate.add(osmvalue);
 	      }
+	    }
+	  }); // 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
 
-	      body.call(section.render);
-	    });
+	  if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+	    var osmvalue = tags.country;
 
-	    context.history().on('change.entity-editor', historyChanged);
+	    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.
 
-	    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.
+	  if (foundSemi) {
+	    return empty;
+	  } else {
+	    return {
+	      primary: primary,
+	      alternate: alternate
+	    };
+	  }
 
+	  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
+	//
 
-	  function changeTags(entityIDs, changed, onInput) {
-	    var actions = [];
 
-	    for (var i in entityIDs) {
-	      var entityID = entityIDs[i];
-	      var entity = context.entity(entityID);
-	      var tags = Object.assign({}, entity.tags); // shallow copy
+	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
+	//   }
+	//
 
-	      for (var k in changed) {
-	        if (!k) continue;
-	        var v = changed[k];
 
-	        if (v !== undefined || tags.hasOwnProperty(k)) {
-	          tags[k] = v;
+	function _upgradeTags(tags, loc) {
+	  var newTags = Object.assign({}, tags); // shallow copy
+
+	  var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements
+
+	  Object.keys(newTags).forEach(function (osmkey) {
+	    var matchTag = osmkey.match(/^(\w+:)?wikidata$/);
+
+	    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 (replace && replace.wikidata !== undefined) {
+	        // replace or delete `*:wikidata` tag
+	        changed = true;
+
+	        if (replace.wikidata) {
+	          newTags[osmkey] = replace.wikidata;
+	        } else {
+	          delete newTags[osmkey];
 	        }
 	      }
 
-	      if (!onInput) {
-	        tags = utilCleanTags(tags);
-	      }
+	      if (replace && replace.wikipedia !== undefined) {
+	        // replace or delete `*:wikipedia` tag
+	        changed = true;
+	        var wpkey = "".concat(prefix, "wikipedia");
 
-	      if (!fastDeepEqual(entity.tags, tags)) {
-	        actions.push(actionChangeTags(entityID, tags));
+	        if (replace.wikipedia) {
+	          newTags[wpkey] = replace.wikipedia;
+	        } else {
+	          delete newTags[wpkey];
+	        }
 	      }
 	    }
+	  }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-	    if (actions.length) {
-	      var combinedAction = function combinedAction(graph) {
-	        actions.forEach(function (action) {
-	          graph = action(graph);
-	        });
-	        return graph;
-	      };
+	  var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match
 
-	      var annotation = _t('operations.change_tags.annotation');
+	  var tryKVs = gatherKVs(tags);
 
-	      if (_coalesceChanges) {
-	        context.overwrite(combinedAction, annotation);
-	      } else {
-	        context.perform(combinedAction, annotation);
-	        _coalesceChanges = !!onInput;
-	      }
-	    } // if leaving field (blur event), rerun validation
+	  if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+	    return changed ? {
+	      newTags: newTags,
+	      matched: null
+	    } : null;
+	  } // Gather namelike tag values to try to match
 
 
-	    if (!onInput) {
-	      context.validator().validate();
-	    }
-	  }
+	  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`.
 
-	  function revertTags(keys) {
-	    var actions = [];
+	  var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
 
-	    for (var i in _entityIDs) {
-	      var entityID = _entityIDs[i];
-	      var original = context.graph().base().entities[entityID];
-	      var changed = {};
+	  if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too
 
-	      for (var j in keys) {
-	        var key = keys[j];
-	        changed[key] = original ? original.tags[key] : undefined;
-	      }
+	  if (!tryNames.primary.size && !tryNames.alternate.size) {
+	    return changed ? {
+	      newTags: newTags,
+	      matched: null
+	    } : null;
+	  } // Order the [key,value,name] tuples - test primary names before alternate names
 
-	      var entity = context.entity(entityID);
-	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	      for (var k in changed) {
-	        if (!k) continue;
-	        var v = changed[k];
+	  var tuples = gatherTuples(tryKVs, tryNames);
+	  var foundPrimary = false;
+	  var bestItem; // Test [key,value,name] tuples against the NSI matcher until we get a primary match or exhaust all options.
 
-	        if (v !== undefined || tags.hasOwnProperty(k)) {
-	          tags[k] = v;
-	        }
-	      }
+	  for (var i = 0; i < tuples.length && !foundPrimary; i++) {
+	    var tuple = tuples[i];
 
-	      tags = utilCleanTags(tags);
+	    var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI
 
-	      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;
-	      };
+	    if (!hits || !hits.length) continue; // no match, try next tuple
 
-	      var annotation = _t('operations.change_tags.annotation');
+	    if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') 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']`
 
-	      if (_coalesceChanges) {
-	        context.overwrite(combinedAction, annotation);
-	      } else {
-	        context.perform(combinedAction, annotation);
-	        _coalesceChanges = false;
+	    for (var j = 0; j < hits.length; j++) {
+	      var hit = hits[j];
+	      var isPrimary = hits[j].match === 'primary';
+	      var itemID = hit.itemID;
+	      if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item
+
+	      var item = _nsi.ids.get(itemID);
+
+	      if (!item) continue;
+	      var mainTag = item.mainTag; // e.g. `brand:wikidata`
+
+	      var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid
+
+	      var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid
+
+	      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
+	      ) {
+	        continue; // continue looking
+	      } // If we get here, the hit is good..
+
+
+	      if (!bestItem || isPrimary) {
+	        bestItem = item;
+
+	        if (isPrimary) {
+	          foundPrimary = true;
+	        }
+
+	        break; // can ignore the rest of the hits from this match
 	      }
 	    }
+	  } // At this point we have matched a canonical item and can suggest tag upgrades..
 
-	    context.validator().validate();
-	  }
 
-	  entityEditor.modified = function (val) {
-	    if (!arguments.length) return _modified;
-	    _modified = val;
-	    return entityEditor;
-	  };
+	  if (bestItem) {
+	    var _ret = function () {
+	      var itemID = bestItem.id;
+	      var item = JSON.parse(JSON.stringify(bestItem)); // deep copy
 
-	  entityEditor.state = function (val) {
-	    if (!arguments.length) return _state;
-	    _state = val;
-	    return entityEditor;
-	  };
+	      var tkv = item.tkv;
+	      var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-	  entityEditor.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
+	      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)
 
-	    _entityIDs = val;
-	    _base = context.graph();
-	    _coalesceChanges = false;
-	    loadActivePresets(true);
-	    return entityEditor.modified(false);
-	  };
+	      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`)
 
-	  entityEditor.newFeature = function (val) {
-	    if (!arguments.length) return _newFeature;
-	    _newFeature = val;
-	    return entityEditor;
-	  };
+	      ['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];
+	        }
+	      }); // 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)
 
-	  function loadActivePresets(isForNewSelection) {
-	    var graph = context.graph();
-	    var counts = {};
+	      _nsi.kvt.forEach(function (vmap, k) {
+	        if (newTags[k] === 'yes') delete newTags[k];
+	      }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`
 
-	    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;
-	    }
 
-	    var matches = Object.keys(counts).sort(function (p1, p2) {
-	      return counts[p2] - counts[p1];
-	    }).map(function (pID) {
-	      return _mainPresetIndex.item(pID);
-	    });
+	      if (foundQID) {
+	        delete newTags.wikipedia;
+	        delete newTags.wikidata;
+	      } // Do the tag upgrade
 
-	    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;
-	    }
+	      Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184
 
-	    entityEditor.presets(matches);
-	  }
+	      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`..
 
-	  entityEditor.presets = function (val) {
-	    if (!arguments.length) return _activePresets; // don't reload the same preset
 
-	    if (!utilArrayIdentical(val, _activePresets)) {
-	      _activePresets = val;
-	    }
+	      var origName = tags.name;
+	      var newName = newTags.name;
 
-	    return entityEditor;
-	  };
+	      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
 
-	  return utilRebind(entityEditor, dispatch$1, 'on');
-	}
+	        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\-\/,.]/);
 
-	function uiPresetList(context) {
-	  var dispatch$1 = dispatch('cancel', 'choose');
+	          for (var split = nameParts.length; split > 0; split--) {
+	            var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-	  var _entityIDs;
+	            var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"
 
-	  var _currentPresets;
+	            var nameHits = _nsi.matcher.match(k, v, name, loc);
 
-	  var _autofocus = false;
+	            if (!nameHits || !nameHits.length) continue; // no match, try next name fragment
 
-	  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$1.call('cancel', this);
-	    }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));
+	            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);
+
+	                  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
 
-	    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);
+	                  } else {
+	                    // "branch" is not noise and not something in NSI
+	                    newTags.branch = branch; // Stick it in the `branch` tag..
+	                  }
+	                }
+	              }
+
+	              break;
+	            }
+	          }
+	        }
 	      }
-	    }
 
-	    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
+	      return {
+	        v: {
+	          newTags: newTags,
+	          matched: item
+	        }
+	      };
+	    }();
 
-	        var buttons = list.selectAll('.preset-list-button');
-	        if (!buttons.empty()) buttons.nodes()[0].focus();
-	      }
-	    }
+	    if (_typeof(_ret) === "object") return _ret.v;
+	  }
 
-	    function keypress(d3_event) {
-	      // enter
-	      var value = search.property('value');
+	  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
+	//
 
-	      if (d3_event.keyCode === 13 && // ↩ Return
-	      value.length) {
-	        list.selectAll('.preset-list-item:first-child').each(function (d) {
-	          d.choose.call(this);
-	        });
-	      }
+
+	function _isGenericName(tags) {
+	  var n = tags.name;
+	  if (!n) return false; // tryNames just contains the `name` tag value and nothing else
+
+	  var tryNames = {
+	    primary: new Set([n]),
+	    alternate: new Set()
+	  }; // Gather key/value tag pairs to try to match
+
+	  var tryKVs = gatherKVs(tags);
+	  if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate
+
+	  var tuples = gatherTuples(tryKVs, tryNames);
+
+	  for (var i = 0; i < tuples.length; i++) {
+	    var tuple = tuples[i];
+
+	    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 (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
+	  }
+
+	  return false;
+	} // PUBLIC INTERFACE
+
+
+	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 apibase$1 = 'https://kartaview.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]);
 
-	    function inputevent() {
-	      var value = search.property('value');
-	      list.classed('filtered', value.length);
-	      var extent = combinedEntityExtent();
-	      var results, messageText;
+	var _oscCache;
 
-	      if (value.length && extent) {
-	        var center = extent.center();
-	        var countryCode = iso1A2Code(center);
-	        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');
-	      }
+	var _oscSelectedImage;
 
-	      list.call(drawList, results);
-	      message.html(messageText);
-	    }
+	var _loadViewerPromise$1;
 
-	    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', inputevent);
+	function abortRequest$3(controller) {
+	  controller.abort();
+	}
 
-	    if (_autofocus) {
-	      search.node().focus(); // Safari 14 doesn't always like to focus immediately,
-	      // so try again on the next pass
+	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;
+	}
 
-	      setTimeout(function () {
-	        search.node().focus();
-	      }, 0);
-	    }
+	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
 
-	    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()));
-	    context.features().on('change.preset-list', updateForFeatureHiddenState);
-	  }
+	  var cache = _oscCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	  function drawList(list, presets) {
-	    presets = presets.matchAllGeometry(entityGeometries());
-	    var collection = presets.collection.reduce(function (collection, preset) {
-	      if (!preset) return collection;
+	    if (!wanted) {
+	      abortRequest$3(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage$1(which, currZoom, url, tile);
+	  });
+	}
 
-	      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));
-	      }
+	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];
 
-	      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();
-	  }
+	    if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+	      throw new Error('No Data');
+	    }
 
-	  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
+	    var features = data.currentPageItems.map(function (item) {
+	      var loc = [+item.lng, +item.lat];
+	      var d;
 
-	    if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
-	      d3_event.preventDefault();
-	      d3_event.stopPropagation(); // the next item in the list at the same level
+	      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 nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+	        var seq = _oscCache.sequences[d.sequence_id];
 
-	      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
+	        if (!seq) {
+	          seq = {
+	            rotation: 0,
+	            images: []
+	          };
+	          _oscCache.sequences[d.sequence_id] = seq;
+	        }
 
-	      } else if (select(this).classed('expanded')) {
-	        // select the first subitem instead
-	        nextItem = item.select('.subgrid .preset-list-item:first-child');
+	        seq.images[d.sequence_index] = d;
+	        _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
 	      }
 
-	      if (!nextItem.empty()) {
-	        // focus on the next item
-	        nextItem.select('.preset-list-button').node().focus();
-	      } // arrow up, move focus to the previous, higher item
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    });
+	    cache.rtree.load(features);
 
-	    } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
-	      d3_event.preventDefault();
-	      d3_event.stopPropagation(); // the previous item in the list at the same level
+	    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
+	    }
 
-	      var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
+	    if (which === 'images') {
+	      dispatch$3.call('loadedImages');
+	    }
+	  })["catch"](function () {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	  });
+	} // partition viewport into higher zoom tiles
 
-	      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');
-	      }
+	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
 
-	      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
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	    } 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
 
-	      if (!parentItem.empty()) {
-	        parentItem.select('.preset-list-button').node().focus();
-	      } // arrow right, choose this item
+	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;
+	  }, []);
+	}
 
-	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
-	      d3_event.preventDefault();
-	      d3_event.stopPropagation();
-	      item.datum().choose.call(select(this).node());
+	var serviceKartaview = {
+	  init: function init() {
+	    if (!_oscCache) {
+	      this.reset();
 	    }
-	  }
-
-	  function CategoryItem(preset) {
-	    var box,
-	        sublist,
-	        shown = false;
 
-	    function item(selection) {
-	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
+	    this.event = utilRebind(this, dispatch$3, 'on');
+	  },
+	  reset: function reset() {
+	    if (_oscCache) {
+	      Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
+	    }
 
-	      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();
-	      }
+	    _oscCache = {
+	      images: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        forImageKey: {}
+	      },
+	      sequences: {}
+	    };
+	    _oscSelectedImage = null;
+	  },
+	  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
 
-	      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
+	    _oscCache.images.rtree.search(bbox).forEach(function (d) {
+	      sequenceKeys[d.data.sequence_id] = true;
+	    }); // make linestrings from those sequences
 
-	          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
+	    var lineStrings = [];
+	    Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+	      var seq = _oscCache.sequences[sequenceKey];
+	      var images = seq && seq.images;
 
-	          if (select(this).classed('expanded')) {
-	            // toggle expansion (collapse the item)
-	            click.call(this, d3_event);
+	      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
 	          }
-	        } 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');
-	    }
+	        });
+	      }
+	    });
+	    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 kartaview-wrapper
 
-	    item.choose = function () {
-	      if (!box || !sublist) return;
+	    var wrap = context.container().select('.photoviewer').selectAll('.kartaview-wrapper').data([0]);
+	    var that = this;
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper kartaview-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)).text('◄');
+	    controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).text('⤿');
+	    controlsEnter.append('button').on('click.rotate-cw', rotate(90)).text('⤾');
+	    controlsEnter.append('button').on('click.forward', step(1)).text('►');
+	    wrapEnter.append('div').attr('class', 'kartaview-image-wrap'); // Register viewer resize handler
 
-	      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');
-	      }
-	    };
+	    context.ui().photoviewer.on('resize.kartaview', function (dimensions) {
+	      imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+	    });
 
-	    item.preset = preset;
-	    return item;
-	  }
+	    function zoomPan(d3_event) {
+	      var t = d3_event.transform;
+	      context.container().select('.photoviewer .kartaview-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
+	    }
 
-	  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);
+	    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 .kartaview-wrapper');
+	        wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	        wrap.selectAll('.kartaview-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
+	      };
 	    }
 
-	    item.choose = function () {
-	      if (select(this).classed('disabled')) return;
+	    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
 
-	      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);
-	        }
+	    _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.kartaview-wrapper.hide').size();
 
-	        return graph;
-	      }, _t('operations.change_tags.annotation'));
-	      context.validator().validate(); // rerun validation
+	    if (isHidden) {
+	      viewer.selectAll('.photo-wrapper:not(.kartaview-wrapper)').classed('hide', true);
+	      viewer.selectAll('.photo-wrapper.kartaview-wrapper').classed('hide', false);
+	    }
 
-	      dispatch$1.call('choose', this, preset);
-	    };
+	    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 .kartaview-wrapper');
+	    var imageWrap = wrap.selectAll('.kartaview-image-wrap');
+	    var attribution = wrap.selectAll('.photo-attribution').text('');
+	    wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	    imageWrap.selectAll('.kartaview-image').remove();
 
-	    item.help = function (d3_event) {
-	      d3_event.stopPropagation();
-	      item.reference.toggle();
-	    };
+	    if (d) {
+	      var sequence = _oscCache.sequences[d.sequence_id];
+	      var r = sequence && sequence.rotation || 0;
+	      imageWrap.append('img').attr('class', 'kartaview-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
 
-	    item.preset = preset;
-	    item.reference = uiTagReference(preset.reference());
-	    return item;
-	  }
+	      if (d.captured_by) {
+	        attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://kartaview.org/user/' + encodeURIComponent(d.captured_by)).text('@' + d.captured_by);
+	        attribution.append('span').text('|');
+	      }
 
-	  function updateForFeatureHiddenState() {
-	    if (!_entityIDs.every(context.hasEntity)) return;
-	    var geometries = entityGeometries();
-	    var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
+	      if (d.captured_at) {
+	        attribution.append('span').attr('class', 'captured_at').text(localeDateString(d.captured_at));
+	        attribution.append('span').text('|');
+	      }
 
-	    button.call(uiTooltip().destroyAny);
-	    button.each(function (item, index) {
-	      var hiddenPresetFeaturesId;
+	      attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://kartaview.org/details/' + d.sequence_id + '/' + d.sequence_index).text('kartaview.org');
+	    }
 
-	      for (var i in geometries) {
-	        hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-	        if (hiddenPresetFeaturesId) break;
-	      }
+	    return this;
 
-	      var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-	      select(this).classed('disabled', isHiddenPreset);
+	    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);
+	    }
+	  },
+	  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
 
-	      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'));
-	      }
+	    var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	    context.container().selectAll('.layer-kartaview .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;
 	    });
-	  }
-
-	  presetList.autofocus = function (val) {
-	    if (!arguments.length) return _autofocus;
-	    _autofocus = val;
-	    return presetList;
-	  };
+	    context.container().selectAll('.layer-kartaview .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	  presetList.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
+	    context.container().selectAll('.layer-kartaview .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	    if (_entityIDs && _entityIDs.length) {
-	      var presets = _entityIDs.map(function (entityID) {
-	        return _mainPresetIndex.match(context.entity(entityID), context.graph());
-	      });
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	      presetList.presets(presets);
+	      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 presetList;
-	  };
-
-	  presetList.presets = function (val) {
-	    if (!arguments.length) return _currentPresets;
-	    _currentPresets = val;
-	    return presetList;
-	  };
-
-	  function entityGeometries() {
-	    var counts = {};
-
-	    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)
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	      if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-	        geometry = 'point';
+	      if (imageKey) {
+	        hash.photo = 'kartaview/' + imageKey;
+	      } else {
+	        delete hash.photo;
 	      }
 
-	      if (!counts[geometry]) counts[geometry] = 0;
-	      counts[geometry] += 1;
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
-
-	    return Object.keys(counts).sort(function (geom1, geom2) {
-	      return counts[geom2] - counts[geom1];
-	    });
+	  },
+	  cache: function cache() {
+	    return _oscCache;
 	  }
+	};
 
-	  function combinedEntityExtent() {
-	    return _entityIDs.reduce(function (extent, entityID) {
-	      var entity = context.graph().entity(entityID);
-	      return extent.extend(entity.extent(context.graph()));
-	    }, geoExtent());
-	  }
+	var hashes$1 = {exports: {}};
 
-	  return utilRebind(presetList, dispatch$1, 'on');
-	}
+	(function (module, exports) {
+	  (function () {
+	    var Hashes;
 
-	function uiInspector(context) {
-	  var presetList = uiPresetList(context);
-	  var entityEditor = uiEntityEditor(context);
-	  var wrap = select(null),
-	      presetPane = select(null),
-	      editorPane = select(null);
-	  var _state = 'select';
+	    function utf8Encode(str) {
+	      var x,
+	          y,
+	          output = '',
+	          i = -1,
+	          l;
 
-	  var _entityIDs;
+	      if (str && str.length) {
+	        l = str.length;
 
-	  var _newFeature = false;
+	        while ((i += 1) < l) {
+	          /* Decode utf-16 surrogate pairs */
+	          x = str.charCodeAt(i);
+	          y = i + 1 < l ? str.charCodeAt(i + 1) : 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');
+	          if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+	            x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+	            i += 1;
+	          }
+	          /* Encode output as utf-8 */
 
-	    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
+	          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);
+	          }
+	        }
+	      }
 
-	      if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
+	      return output;
+	    }
 
-	      if (_newFeature) return true; // all existing features except vertices should default to inspector
+	    function utf8Decode(str) {
+	      var i,
+	          ac,
+	          c1,
+	          c2,
+	          c3,
+	          arr = [],
+	          l;
+	      i = ac = c1 = c2 = c3 = 0;
 
-	      if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
+	      if (str && str.length) {
+	        l = str.length;
+	        str += '';
 
-	      if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
+	        while (i < l) {
+	          c1 = str.charCodeAt(i);
+	          ac += 1;
 
-	      if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
+	          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;
+	          }
+	        }
+	      }
 
-	      if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
+	      return arr.join('');
+	    }
+	    /**
+	     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+	     * to work around bugs in some JS interpreters.
+	     */
 
-	      return true;
+
+	    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.
+	     */
 
-	    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);
+
+	    function bit_rol(num, cnt) {
+	      return num << cnt | num >>> 32 - cnt;
 	    }
+	    /**
+	     * Convert a raw string to a hex string
+	     */
 
-	    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])));
-	  }
 
-	  inspector.showList = function (presets) {
-	    presetPane.classed('hide', false);
-	    wrap.transition().styleTween('right', function () {
-	      return interpolate('0%', '-100%');
-	    }).on('end', function () {
-	      editorPane.classed('hide', true);
-	    });
+	    function rstr2hex(input, hexcase) {
+	      var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+	          output = '',
+	          x,
+	          i = 0,
+	          l = input.length;
 
-	    if (presets) {
-	      presetList.presets(presets);
+	      for (; i < l; i += 1) {
+	        x = input.charCodeAt(i);
+	        output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+	      }
+
+	      return output;
 	    }
+	    /**
+	     * Convert an array of big-endian words to a string
+	     */
 
-	    presetPane.call(presetList.autofocus(true));
-	  };
 
-	  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('-100%', '0%');
-	      }).on('end', function () {
-	        presetPane.classed('hide', true);
-	      });
+	    function binb2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	      if (preset) {
-	        entityEditor.presets([preset]);
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
 	      }
 
-	      editorPane.call(entityEditor);
+	      return output;
 	    }
-	  };
+	    /**
+	     * Convert an array of little-endian words to a string
+	     */
 
-	  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
 
-	    context.container().selectAll('.field-help-body').remove();
-	    return inspector;
-	  };
+	    function binl2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	  inspector.entityIDs = function (val) {
-	    if (!arguments.length) return _entityIDs;
-	    _entityIDs = val;
-	    return inspector;
-	  };
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	      }
 
-	  inspector.newFeature = function (val) {
-	    if (!arguments.length) return _newFeature;
-	    _newFeature = val;
-	    return inspector;
-	  };
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an array of little-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	  return inspector;
-	}
 
-	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);
+	    function rstr2binl(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	  var _current;
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	  var _wasData = false;
-	  var _wasNote = false;
-	  var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+	      }
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an array of big-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	  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 rstr2binb(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	    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
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	      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
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+	      }
 
-	      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);
+	      return output;
 	    }
+	    /**
+	     * Convert a raw string to an arbitrary string encoding
+	     */
 
-	    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 + '%');
+	    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 */
 
-	        if (isCollapsed) {
-	          context.ui().onResize([-sidebarWidth * scaleX, 0]);
-	        } else {
-	          context.ui().onResize([-dx * scaleX, 0]);
-	        }
-	      }
-	    }
+	      dividend = Array(Math.ceil(input.length / 2));
+	      ld = dividend.length;
 
-	    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);
-	    }
+	      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.
+	       */
 
-	    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').classed('hover', false);
+	      while (dividend.length > 0) {
+	        quotient = Array();
+	        x = 0;
 
-	      if (context.selectedIDs().length > 1 && targets && targets.length) {
-	        var elements = context.container().selectAll('.feature-list-item').filter(function (node) {
-	          return targets.indexOf(node) !== -1;
-	        });
+	        for (i = 0; i < dividend.length; i += 1) {
+	          x = (x << 16) + dividend[i];
+	          q = Math.floor(x / divisor);
+	          x -= q * divisor;
 
-	        if (!elements.empty()) {
-	          elements.classed('hover', true);
+	          if (quotient.length > 0 || q > 0) {
+	            quotient[quotient.length] = q;
+	          }
 	        }
+
+	        remainders[remainders.length] = x;
+	        dividend = quotient;
 	      }
-	    };
+	      /* Convert the remainders to the output string */
 
-	    sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-	    function hover(targets) {
-	      var datum = targets && targets.length && targets[0];
+	      output = '';
 
-	      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;
+	      for (i = remainders.length - 1; i >= 0; i--) {
+	        output += encoding.charAt(remainders[i]);
+	      }
+	      /* Append leading zero equivalents */
 
-	        if (osm) {
-	          datum = osm.getNote(datum.id); // marker may contain stale data - get latest
-	        }
 
-	        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];
+	      full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-	        if (errService) {
-	          // marker may contain stale data - get latest
-	          datum = errService.getError(datum.id);
-	        } // Currently only three possible services
+	      for (i = output.length; i < full_length; i += 1) {
+	        output = encoding[0] + output;
+	      }
 
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to a base-64 string
+	     */
 
-	        var errEditor;
 
-	        if (datum.service === 'keepRight') {
-	          errEditor = keepRightEditor;
-	        } else if (datum.service === 'osmose') {
-	          errEditor = osmoseEditor;
-	        } else {
-	          errEditor = improveOsmEditor;
-	        }
+	    function rstr2b64(input, b64pad) {
+	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	          output = '',
+	          len = input.length,
+	          i,
+	          j,
+	          triplet;
+	      b64pad = b64pad || '=';
 
-	        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);
+	      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);
 
-	        if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-	          inspector.state('hover').entityIDs([datum.id]).newFeature(false);
-	          inspectorWrap.call(inspector);
+	        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);
+	          }
 	        }
-	      } 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();
 	      }
+
+	      return output;
 	    }
 
-	    sidebar.hover = throttle(hover, 200);
+	    Hashes = {
+	      /**
+	       * @property {String} version
+	       * @readonly
+	       */
+	      VERSION: '1.0.6',
 
-	    sidebar.intersects = function (extent) {
-	      var rect = selection.node().getBoundingClientRect();
-	      return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
-	    };
+	      /**
+	       * @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
 
-	    sidebar.select = function (ids, newFeature) {
-	      sidebar.hide();
+	        this.encode = function (input) {
+	          var i,
+	              j,
+	              triplet,
+	              output = '',
+	              len = input.length;
+	          pad = pad || '=';
+	          input = utf8 ? utf8Encode(input) : input;
 
-	      if (ids && ids.length) {
-	        var entity = ids.length === 1 && context.entity(ids[0]);
+	          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);
 
-	        if (entity && newFeature && selection.classed('collapsed')) {
-	          // uncollapse the sidebar
-	          var extent = entity.extent(context.graph());
-	          sidebar.expand(sidebar.intersects(extent));
-	        }
+	            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);
+	              }
+	            }
+	          }
 
-	        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
+	          return output;
+	        }; // public method for decoding
 
-	        inspector.state('select').entityIDs(ids).newFeature(newFeature);
-	        inspectorWrap.call(inspector);
-	      } else {
-	        inspector.state('hide');
-	      }
-	    };
 
-	    sidebar.showPresetList = function () {
-	      inspector.showList();
-	    };
+	        this.decode = function (input) {
+	          // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+	          var i,
+	              o1,
+	              o2,
+	              o3,
+	              h1,
+	              h2,
+	              h3,
+	              h4,
+	              bits,
+	              ac,
+	              dec = '',
+	              arr = [];
 
-	    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);
-	    };
+	          if (!input) {
+	            return input;
+	          }
 
-	    sidebar.hide = function () {
-	      featureListWrap.classed('inspector-hidden', false);
-	      inspectorWrap.classed('inspector-hidden', true);
-	      if (_current) _current.remove();
-	      _current = null;
-	    };
+	          i = ac = 0;
+	          input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+	          //input += '';
 
-	    sidebar.expand = function (moveMap) {
-	      if (selection.classed('collapsed')) {
-	        sidebar.toggle(moveMap);
-	      }
-	    };
+	          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;
 
-	    sidebar.collapse = function (moveMap) {
-	      if (!selection.classed('collapsed')) {
-	        sidebar.toggle(moveMap);
-	      }
-	    };
+	            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);
 
-	    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
+	          dec = arr.join('');
+	          dec = utf8 ? utf8Decode(dec) : dec;
+	          return dec;
+	        }; // set custom pad string
 
-	      selection.style('width', sidebarWidth + 'px');
-	      var startMargin, endMargin, lastMargin;
 
-	      if (isCollapsing) {
-	        startMargin = lastMargin = 0;
-	        endMargin = -sidebarWidth;
-	      } else {
-	        startMargin = lastMargin = -sidebarWidth;
-	        endMargin = 0;
-	      }
+	        this.setPad = function (str) {
+	          pad = str || pad;
+	          return this;
+	        }; // set custom tab string characters
 
-	      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]);
+
+	        this.setTab = function (str) {
+	          tab = str || tab;
+	          return this;
 	        };
-	      }).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 + '%');
-	        }
-	      });
-	    }; // toggle the sidebar collapse when double-clicking the resizer
+	        this.setUTF8 = function (bool) {
+	          if (typeof bool === 'boolean') {
+	            utf8 = bool;
+	          }
 
+	          return this;
+	        };
+	      },
 
-	    resizer.on('dblclick', function (d3_event) {
-	      d3_event.preventDefault();
+	      /**
+	       * 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;
 
-	      if (d3_event.sourceEvent) {
-	        d3_event.sourceEvent.preventDefault();
-	      }
+	        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)
 
-	      sidebar.toggle();
-	    }); // 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([]);
-	      }
-	    });
-	  }
+	        return (crc ^ -1) >>> 0;
+	      },
 
-	  sidebar.showPresetList = function () {};
+	      /**
+	       * @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
 
-	  sidebar.hover = function () {};
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	  sidebar.hover.cancel = function () {};
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	  sidebar.intersects = function () {};
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	  sidebar.select = function () {};
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  sidebar.show = function () {};
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d), hexcase);
+	        };
 
-	  sidebar.hide = function () {};
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  sidebar.expand = function () {};
+	        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
+	         */
 
-	  sidebar.collapse = function () {};
 
-	  sidebar.toggle = function () {};
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {Boolean}
+	         * @return {Object} this
+	         */
 
-	  return sidebar;
-	}
 
-	function uiSourceSwitch(context) {
-	  var keys;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	  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
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {String} Pad
+	         * @return {Object} this
+	         */
 
-	    context.flush(); // remove stored data
 
-	    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)
-	  }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {Boolean}
+	         * @return {Object} [this]
+	         */
 
-	  var sourceSwitch = function sourceSwitch(selection) {
-	    selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
-	  };
 
-	  sourceSwitch.keys = function (_) {
-	    if (!arguments.length) return keys;
-	    keys = _;
-	    return sourceSwitch;
-	  };
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  return sourceSwitch;
-	}
+	          return this;
+	        }; // private methods
 
-	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);
+	        /**
+	         * Calculate the MD5 of a raw string
+	         */
 
-	    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 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)
+	         */
 
-	    var updateMessage = '';
-	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-	    var showSplash = !corePreferences('sawSplash');
 
-	    if (sawPrivacyVersion !== context.privacyVersion) {
-	      updateMessage = _t('splash.privacy_update');
-	      showSplash = true;
-	    }
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, hash, i;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binl(key);
 
-	    if (!showSplash) return;
-	    corePreferences('sawSplash', true);
-	    corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
-	    _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="http://ideditor.blog/">ideditor.blog</a>',
-	      github: '<a target="_blank" href="https://github.com/openstreetmap/iD">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');
-	  };
-	}
+	          ipad = Array(16), opad = Array(16);
 
-	function uiStatus(context) {
-	  var osm = context.connection();
-	  return function (selection) {
-	    if (!osm) return;
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    function update(err, apiStatus) {
-	      selection.html('');
+	          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.
+	         */
 
-	      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
 
-	            osm.reloadApiStatus();
-	          }, 2000); // eslint-disable-next-line no-warning-comments
-	          // TODO: nice messages for different error types
+	        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);
+	          }
 
-	          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();
-	          });
+	          return Array(a, b, c, d);
 	        }
-	      } 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'));
-	      }
-
-	      selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-	    }
-
-	    osm.on('apiStatusChange.uiStatus', update); // reload the status periodically regardless of other factors
-
-	    window.setInterval(function () {
-	      osm.reloadApiStatus();
-	    }, 90000); // 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'
-	  };
-	  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;
-
-	  mode.enter = function () {
-	    context.install(behavior);
-	  };
-
-	  mode.exit = function () {
-	    context.uninstall(behavior);
-	  };
+	        /**
+	         * These functions implement the four basic operations the algorithm uses.
+	         */
 
-	  mode.selectedIDs = function () {
-	    return [wayID];
-	  };
 
-	  mode.activeID = function () {
-	    return behavior && behavior.activeID() || [];
-	  };
+	        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);
+	        }
 
-	  return mode;
-	}
+	        function md5_ff(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+	        }
 
-	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');
+	        function md5_gg(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+	        }
 
-	  function actionClose(wayId) {
-	    return function (graph) {
-	      return graph.replace(graph.entity(wayId).close());
-	    };
-	  }
+	        function md5_hh(a, b, c, d, x, s, t) {
+	          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	        }
 
-	  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));
-	  }
+	        function md5_ii(a, b, c, d, x, s, t) {
+	          return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+	        }
+	      },
 
-	  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));
-	  }
+	      /**
+	       * @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
 
-	  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));
-	  }
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	  mode.enter = function () {
-	    context.install(behavior);
-	  };
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	  mode.exit = function () {
-	    context.uninstall(behavior);
-	  };
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	  return mode;
-	}
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	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');
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	  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));
-	  }
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  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));
-	  }
+	        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
+	         */
 
-	  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));
-	  }
 
-	  mode.enter = function () {
-	    context.install(behavior);
-	  };
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  mode.exit = function () {
-	    context.uninstall(behavior);
-	  };
 
-	  return mode;
-	}
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	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');
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  function add(loc) {
-	    var node = osmNode({
-	      loc: loc,
-	      tags: defaultTags
-	    });
-	    context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
-	    enterSelectMode(node);
-	  }
 
-	  function addWay(loc, edge) {
-	    var node = osmNode({
-	      tags: defaultTags
-	    });
-	    context.perform(actionAddMidpoint({
-	      loc: loc,
-	      edge: edge
-	    }, node), _t('operations.add.annotation.vertex'));
-	    enterSelectMode(node);
-	  }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  function enterSelectMode(node) {
-	    context.enter(modeSelect(context, [node.id]).newFeature(true));
-	  }
 
-	  function addNode(node) {
-	    if (Object.keys(defaultTags).length === 0) {
-	      enterSelectMode(node);
-	      return;
-	    }
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	    var tags = Object.assign({}, node.tags); // shallow copy
+	          return this;
+	        }; // private methods
 
-	    for (var key in defaultTags) {
-	      tags[key] = defaultTags[key];
-	    }
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	    context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
-	    enterSelectMode(node);
-	  }
 
-	  function cancel() {
-	    context.enter(modeBrowse(context));
-	  }
+	        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)
+	         */
 
-	  mode.enter = function () {
-	    context.install(behavior);
-	  };
 
-	  mode.exit = function () {
-	    context.uninstall(behavior);
-	  };
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, i, hash;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binb(key);
 
-	  return mode;
-	}
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	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);
+	          ipad = Array(16), opad = Array(16);
 
-	  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)
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    context.map().pan([0, 0]);
-	    context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
-	  }
+	          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 cancel() {
-	    context.enter(modeBrowse(context));
-	  }
 
-	  mode.enter = function () {
-	    context.install(behavior);
-	  };
+	        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 */
 
-	  mode.exit = function () {
-	    context.uninstall(behavior);
-	  };
+	          x[len >> 5] |= 0x80 << 24 - len % 32;
+	          x[(len + 64 >> 9 << 4) + 15] = len;
 
-	  return mode;
-	}
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            olde = e;
 
-	function uiConflicts(context) {
-	  var dispatch$1 = dispatch('cancel', 'save');
-	  var keybinding = utilKeybinding('conflicts');
+	            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 _origChanges;
+	              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 _conflictList;
+	            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 _shownConflictIndex;
+	          return Array(a, b, c, d, e);
+	        }
+	        /**
+	         * Perform the appropriate triplet combination function for the current
+	         * iteration
+	         */
 
-	  function keybindingOn() {
-	    select(document).call(keybinding.on('⎋', cancel, true));
-	  }
 
-	  function keybindingOff() {
-	    select(document).call(keybinding.unbind);
-	  }
+	        function sha1_ft(t, b, c, d) {
+	          if (t < 20) {
+	            return b & c | ~b & d;
+	          }
 
-	  function tryAgain() {
-	    keybindingOff();
-	    dispatch$1.call('save');
-	  }
+	          if (t < 40) {
+	            return b ^ c ^ d;
+	          }
 
-	  function cancel() {
-	    keybindingOff();
-	    dispatch$1.call('cancel');
-	  }
+	          if (t < 60) {
+	            return b & c | b & d | c & d;
+	          }
 
-	  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
+	          return b ^ c ^ d;
+	        }
+	        /**
+	         * Determine the appropriate additive constant for the current iteration
+	         */
 
-	    var detected = utilDetect();
-	    var changeset = new osmChangeset();
-	    delete changeset.id; // Export without changeset_id
 
-	    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');
+	        function sha1_kt(t) {
+	          return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+	        }
+	      },
 
-	    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);
-	      });
-	    }
+	      /**
+	       * @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 : '=',
 
-	    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);
-	  }
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	  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..
+	        /* enable/disable utf8 encoding */
+	        sha256_K;
+	        /* privileged (public) methods */
 
-	    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);
-	    }
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s, utf8));
+	        };
 
-	    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);
-	    });
-	  }
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s, utf8), b64pad);
+	        };
 
-	  function addChoices(selection) {
-	    var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
-	      return d.choices || [];
-	    }); // enter
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s, utf8), e);
+	        };
 
-	    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
+	        this.raw = function (s) {
+	          return rstr(s, utf8);
+	        };
 
-	    choicesEnter.merge(choices).each(function (d) {
-	      var ul = this.parentNode;
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	      if (ul.__data__.chosen === d.id) {
-	        choose(null, ul, d);
-	      }
-	    });
-	  }
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  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);
-	  }
+	        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
+	         */
 
-	  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);
-	      }
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	      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)
-	  //     ]
-	  // }
 
+	        this.setUpperCase = function (a) {
 
-	  conflicts.conflictList = function (_) {
-	    if (!arguments.length) return _conflictList;
-	    _conflictList = _;
-	    return conflicts;
-	  };
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  conflicts.origChanges = function (_) {
-	    if (!arguments.length) return _origChanges;
-	    _origChanges = _;
-	    return conflicts;
-	  };
 
-	  conflicts.shownEntityIds = function () {
-	    if (_conflictList && typeof _shownConflictIndex === 'number') {
-	      return [_conflictList[_shownConflictIndex].id];
-	    }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    return [];
-	  };
 
-	  return utilRebind(conflicts, dispatch$1, 'on');
-	}
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	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');
+	          return this;
+	        }; // private methods
 
-	  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;
-	  };
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	  return modalSelection;
-	}
 
-	function uiChangesetEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var formFields = uiFormFields(context);
-	  var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
+	        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)
+	         */
 
-	  var _fieldsArr;
 
-	  var _tags;
+	        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);
 
-	  var _changesetID;
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	  function changesetEditor(selection) {
-	    render(selection);
-	  }
+	          for (; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	  function render(selection) {
-	    var initial = false;
+	          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
+	         */
 
-	    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
-	      })];
 
-	      _fieldsArr.forEach(function (field) {
-	        field.on('change', function (t, onInput) {
-	          dispatch$1.call('change', field, undefined, t, onInput);
-	        });
-	      });
-	    }
+	        function sha256_S(X, n) {
+	          return X >>> n | X << 32 - n;
+	        }
 
-	    _fieldsArr.forEach(function (field) {
-	      field.tags(_tags);
-	    });
+	        function sha256_R(X, n) {
+	          return X >>> n;
+	        }
 
-	    selection.call(formFields.fieldsArr(_fieldsArr));
+	        function sha256_Ch(x, y, z) {
+	          return x & y ^ ~x & z;
+	        }
 
-	    if (initial) {
-	      var commentField = selection.select('.form-field-comment textarea');
-	      var commentNode = commentField.node();
+	        function sha256_Maj(x, y, z) {
+	          return x & y ^ x & z ^ y & z;
+	        }
 
-	      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
+	        function sha256_Sigma0256(x) {
+	          return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+	        }
 
+	        function sha256_Sigma1256(x) {
+	          return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+	        }
 
-	      utilTriggerEvent(commentField, 'blur');
-	      var osm = context.connection();
+	        function sha256_Gamma0256(x) {
+	          return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+	        }
 
-	      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
+	        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];
 
-	    var hasGoogle = _tags.comment.match(/google/i);
+	        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 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);
-	  }
+	          m[l >> 5] |= 0x80 << 24 - l % 32;
+	          m[(l + 64 >> 9 << 4) + 15] = l;
 
-	  changesetEditor.tags = function (_) {
-	    if (!arguments.length) return _tags;
-	    _tags = _; // Don't reset _fieldsArr here.
+	          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];
 
-	    return changesetEditor;
-	  };
+	            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]);
+	              }
 
-	  changesetEditor.changesetID = function (_) {
-	    if (!arguments.length) return _changesetID;
-	    if (_changesetID === _) return changesetEditor;
-	    _changesetID = _;
-	    _fieldsArr = null;
-	    return changesetEditor;
-	  };
+	              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);
+	            }
 
-	  return utilRebind(changesetEditor, dispatch$1, 'on');
-	}
+	            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]);
+	          }
 
-	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);
+	          return HASH;
+	        }
+	      },
 
-	  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 = '';
+	      /**
+	       * @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;
 
-	      if (name !== '') {
-	        string += ':';
-	      }
+	        var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	      return string += ' ' + name;
-	    });
-	    items = itemsEnter.merge(items); // Download changeset link
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	    var changeset = new osmChangeset().update({
-	      id: undefined
-	    });
-	    var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-	    delete changeset.id; // Export without chnageset_id
+	        /* enable/disable utf8 encoding */
+	        sha512_k;
+	        /* privileged (public) methods */
 
-	    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');
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	    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);
-	      });
-	    }
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	    function mouseover(d) {
-	      if (d.entity) {
-	        context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
-	      }
-	    }
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	    function mouseout() {
-	      context.surface().selectAll('.hover').classed('hover', false);
-	    }
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    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);
-	      }
-	    }
-	  }
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  return section;
-	}
+	        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
+	         */
 
-	function uiCommitWarnings(context) {
-	  function commitWarnings(selection) {
-	    var issuesBySeverity = context.validator().getIssuesBySeverity({
-	      what: 'edited',
-	      where: 'all',
-	      includeDisabledRules: true
-	    });
 
-	    for (var severity in issuesBySeverity) {
-	      var issues = issuesBySeverity[severity];
-	      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.id;
-	      });
-	      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);
-	      });
-	    }
-	  }
+	        this.setUpperCase = function (a) {
 
-	  return commitWarnings;
-	}
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	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 uiCommit(context) {
-	  var dispatch$1 = dispatch('cancel');
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  var _userDetails;
 
-	  var _selection;
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  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);
+	          return this;
+	        };
+	        /* private methods */
 
-	  function commit(selection) {
-	    _selection = selection; // Initialize changeset if one does not exist yet.
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	    if (!context.changeset) initChangeset();
-	    loadDerivedChangesetTags();
-	    selection.call(render);
-	  }
 
-	  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
+	        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)
+	         */
 
-	    if (commentDate > currDate || currDate - commentDate > cutoff) {
-	      corePreferences('comment', null);
-	      corePreferences('hashtags', null);
-	      corePreferences('source', null);
-	    } // load in explicitly-set values, if any
 
+	        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);
 
-	    if (context.defaultChangesetComment()) {
-	      corePreferences('comment', context.defaultChangesetComment());
-	      corePreferences('commentDate', Date.now());
-	    }
+	          if (bkey.length > 32) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	    if (context.defaultChangesetSource()) {
-	      corePreferences('source', context.defaultChangesetSource());
-	      corePreferences('commentDate', Date.now());
-	    }
+	          for (; i < 32; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    if (context.defaultChangesetHashtags()) {
-	      corePreferences('hashtags', context.defaultChangesetHashtags());
-	      corePreferences('commentDate', Date.now());
-	    }
+	          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
+	         */
 
-	    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
 
-	    findHashtags(tags, true);
-	    var hashtags = corePreferences('hashtags');
+	        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 (hashtags) {
-	      tags.hashtags = hashtags;
-	    }
+	          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 source = corePreferences('source');
+	          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.
 
-	    if (source) {
-	      tags.source = source;
-	    }
 
-	    var photoOverlaysUsed = context.history().photoOverlaysUsed();
+	          x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+	          x[(len + 128 >> 10 << 5) + 31] = len;
+	          l = x.length;
 
-	    if (photoOverlaysUsed.length) {
-	      var sources = (tags.source || '').split(';'); // include this tag for any photo layer
+	          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]);
 
-	      if (sources.indexOf('streetlevel imagery') === -1) {
-	        sources.push('streetlevel imagery');
-	      } // add the photo overlays used during editing as sources
+	            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
 
-	      photoOverlaysUsed.forEach(function (photoOverlay) {
-	        if (sources.indexOf(photoOverlay) === -1) {
-	          sources.push(photoOverlay);
-	        }
-	      });
-	      tags.source = context.cleanTagValue(sources.join(';'));
-	    }
+	              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]);
+	            }
 
-	    context.changeset = new osmChangeset({
-	      tags: tags
-	    });
-	  } // Calculates read-only metadata tags based on the user's editing session and applies
-	  // them to the changeset.
+	            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
 
-	  function loadDerivedChangesetTags() {
-	    var osm = context.connection();
-	    if (!osm) return;
-	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
-	    // assign tags for imagery used
+	              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
 
-	    var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-	    tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
+	              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);
+	            }
 
-	    var osmClosed = osm.getClosedIDs();
-	    var itemType;
+	            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
 
-	    if (osmClosed.length) {
-	      tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-	    }
 
-	    if (services.keepRight) {
-	      var krClosed = services.keepRight.getClosedIDs();
+	          for (i = 0; i < 8; i += 1) {
+	            hash[2 * i] = H[i].h;
+	            hash[2 * i + 1] = H[i].l;
+	          }
 
-	      if (krClosed.length) {
-	        tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-	      }
-	    }
+	          return hash;
+	        } //A constructor for 64-bit numbers
 
-	    if (services.improveOSM) {
-	      var iOsmClosed = services.improveOSM.getClosedCounts();
 
-	      for (itemType in iOsmClosed) {
-	        tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-	      }
-	    }
+	        function int64(h, l) {
+	          this.h = h;
+	          this.l = l; //this.toString = int64toString;
+	        } //Copies src into dst, assuming both are 64-bit numbers
 
-	    if (services.osmose) {
-	      var osmoseClosed = services.osmose.getClosedCounts();
 
-	      for (itemType in osmoseClosed) {
-	        tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-	      }
-	    } // remove existing issue counts
+	        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
 
 
-	    for (var key in tags) {
-	      if (key.match(/(^warnings:)|(^resolved:)/)) {
-	        delete tags[key];
-	      }
-	    }
+	        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
 
-	    function addIssueCounts(issues, prefix) {
-	      var issuesByType = utilArrayGroupBy(issues, 'type');
 
-	      for (var issueType in issuesByType) {
-	        var issuesOfType = issuesByType[issueType];
+	        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
 
-	        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());
-	        }
-	      }
-	    } // add counts of warnings generated by the user's edits
+	        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 warnings = context.validator().getIssuesBySeverity({
-	      what: 'edited',
-	      where: 'all',
-	      includeIgnored: true,
-	      includeDisabledRules: true
-	    }).warning;
-	    addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
+	        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 resolvedIssues = context.validator().getResolvedIssues();
-	    addIssueCounts(resolvedIssues, 'resolved');
-	    context.changeset = context.changeset.update({
-	      tags: tags
-	    });
-	  }
 
-	  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$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); // Changeset Section
+	        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
 
-	    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
 
-	    body.call(commitWarnings); // Upload Explanation
+	        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;
+	        }
+	      },
 
-	    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]);
+	      /**
+	       * @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;
 
-	    if (prose.enter().size()) {
-	      // first time, make sure to update user details in prose
-	      _userDetails = null;
-	    }
+	        var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-	    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
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	    osm.userDetails(function (err, user) {
-	      if (err) return;
-	      if (_userDetails === user) return; // no change
+	        /* 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 */
 
-	      _userDetails = user;
-	      var userLink = select(document.createElement('div'));
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	      if (user.image_url) {
-	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
-	      }
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	      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
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	    var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	    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);
-	    labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
-	    labelEnter.append('span').html(_t.html('commit.request_review')); // Update
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    requestReview = requestReview.merge(requestReviewEnter);
-	    var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	    var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
+	        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 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
 
-	    buttonSection = buttonSection.merge(buttonEnter);
-	    buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
-	      dispatch$1.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
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	        for (var key in context.changeset.tags) {
-	          // remove any empty keys before upload
-	          if (!key) delete context.changeset.tags[key];
-	        }
 
-	        context.uploader().save(context.changeset);
-	      }
-	    }); // remove any existing tooltip
+	        this.setUpperCase = function (a) {
 
-	    uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    if (uploadBlockerTooltipText) {
-	      buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-	    } // Raw Tag Editor
 
+	        this.setPad = function (a) {
+	          if (typeof a !== 'undefined') {
+	            b64pad = a;
+	          }
 
-	    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
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    changesSection.call(commitChanges.render);
 
-	    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);
-	    }
-	  }
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  function getUploadBlockerMessage() {
-	    var errors = context.validator().getIssuesBySeverity({
-	      what: 'edited',
-	      where: 'all'
-	    }).error;
+	          return this;
+	        };
+	        /* private methods */
 
-	    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;
+	        /**
+	         * Calculate the rmd160 of a raw string
+	         */
 
-	      if (!hasChangesetComment) {
-	        return _t('commit.comment_needed_message');
-	      }
-	    }
 
-	    return null;
-	  }
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+	         */
 
-	  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 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);
 
-	    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`
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    updateChangeset(changed, onInput);
+	          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
+	         */
 
-	    if (_selection) {
-	      _selection.call(render);
-	    }
-	  }
 
-	  function findHashtags(tags, commentOnly) {
-	    var detectedHashtags = commentHashtags();
+	        function binl2rstr(input) {
+	          var i,
+	              output = '',
+	              l = input.length * 32;
 
-	    if (detectedHashtags.length) {
-	      // always remove stored hashtags if there are hashtags in the comment - #4304
-	      corePreferences('hashtags', null);
-	    }
+	          for (i = 0; i < l; i += 8) {
+	            output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	          }
 
-	    if (!detectedHashtags.length || !commentOnly) {
-	      detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-	    }
+	          return output;
+	        }
+	        /**
+	         * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+	         */
 
-	    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;
-	      }
+	        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 */
 
-	      return false;
-	    }); // Extract hashtags from `comment`
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+	          l = x.length;
 
-	    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`
+	          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;
+	            }
 
-	    function hashtagHashtags() {
-	      var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
-	        if (s[0] !== '#') {
-	          s = '#' + s;
-	        } // prepend '#'
+	            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];
+	        } // specific algorithm methods
 
-	        var matched = s.match(hashtagRegex);
-	        return matched && matched[0];
-	      }).filter(Boolean); // exclude falsy
 
-	      return matches || [];
-	    }
-	  }
+	        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';
+	        }
 
-	  function isReviewRequested(tags) {
-	    var rr = tags.review_requested;
-	    if (rr === undefined) return false;
-	    rr = rr.trim().toLowerCase();
-	    return !(rr === '' || rr === 'no');
-	  }
+	        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 updateChangeset(changed, onInput) {
-	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
+	        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';
+	        }
+	      }
+	    }; // exposes Hashes
 
-	    Object.keys(changed).forEach(function (k) {
-	      var v = changed[k];
-	      k = context.cleanTagKey(k);
-	      if (readOnlyTags.indexOf(k) !== -1) return;
+	    (function (window, undefined$1) {
+	      var freeExports = false;
 
-	      if (v === undefined) {
-	        delete tags[k];
-	      } else if (onInput) {
-	        tags[k] = v;
-	      } else {
-	        tags[k] = context.cleanTagValue(v);
-	      }
-	    });
+	      {
+	        freeExports = exports;
 
-	    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 (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+	          window = commonjsGlobal;
+	        }
+	      }
 
-	      if (arr.length) {
-	        tags.hashtags = context.cleanTagValue(arr.join(';'));
-	        corePreferences('hashtags', tags.hashtags);
+	      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 {
-	        delete tags.hashtags;
-	        corePreferences('hashtags', null);
+	        // in a browser or Rhino
+	        window.Hashes = Hashes;
 	      }
-	    } // 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); // first 100 edits - new user
+	    })(this);
+	  })(); // IIFE
 
-	      if (changesetsCount <= 100) {
-	        var s;
-	        s = corePreferences('walkthrough_completed');
+	})(hashes$1, hashes$1.exports);
 
-	        if (s) {
-	          tags['ideditor:walkthrough_completed'] = s;
-	        }
+	var hashes = hashes$1.exports,
+	    sha1 = new hashes.SHA1(); // # xtend
 
-	        s = corePreferences('walkthrough_progress');
+	var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
 
-	        if (s) {
-	          tags['ideditor:walkthrough_progress'] = s;
-	        }
+	function xtend$1() {
+	  var target = {};
 
-	        s = corePreferences('walkthrough_started');
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
 
-	        if (s) {
-	          tags['ideditor:walkthrough_started'] = s;
-	        }
+	    for (var key in source) {
+	      if (hasOwnProperty$1.call(source, key)) {
+	        target[key] = source[key];
 	      }
-	    } else {
-	      delete tags.changesets_count;
-	    }
-
-	    if (!fastDeepEqual(context.changeset.tags, tags)) {
-	      context.changeset = context.changeset.update({
-	        tags: tags
-	      });
 	    }
 	  }
 
-	  commit.reset = function () {
-	    context.changeset = null;
-	  };
-
-	  return utilRebind(commit, dispatch$1, 'on');
+	  return target;
 	}
 
-	var globalIsFinite = global_1.isFinite;
+	var ohauth$1 = {};
 
-	// `Number.isFinite` method
-	// https://tc39.github.io/ecma262/#sec-number.isfinite
-	var numberIsFinite = Number.isFinite || function isFinite(it) {
-	  return typeof it == 'number' && globalIsFinite(it);
+	ohauth$1.qsString = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return ohauth$1.percentEncode(key) + '=' + ohauth$1.percentEncode(obj[key]);
+	  }).join('&');
 	};
 
-	// `Number.isFinite` method
-	// https://tc39.github.io/ecma262/#sec-number.isfinite
-	_export({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
-
-	var RADIUS = 6378137;
-	var FLATTENING = 1 / 298.257223563;
-	var POLAR_RADIUS$1 = 6356752.3142;
-	var wgs84 = {
-	  RADIUS: RADIUS,
-	  FLATTENING: FLATTENING,
-	  POLAR_RADIUS: POLAR_RADIUS$1
+	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;
+	  }, {});
 	};
 
-	var geometry_1 = geometry;
-	var ring = ringArea;
+	ohauth$1.rawxhr = function (method, url, data, headers, callback) {
+	  var xhr = new XMLHttpRequest(),
+	      twoHundred = /^20\d$/;
 
-	function geometry(_) {
-	  var area = 0,
-	      i;
+	  xhr.onreadystatechange = function () {
+	    if (4 === xhr.readyState && 0 !== xhr.status) {
+	      if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
+	    }
+	  };
 
-	  switch (_.type) {
-	    case 'Polygon':
-	      return polygonArea(_.coordinates);
+	  xhr.onerror = function (e) {
+	    return callback(e, null);
+	  };
 
-	    case 'MultiPolygon':
-	      for (i = 0; i < _.coordinates.length; i++) {
-	        area += polygonArea(_.coordinates[i]);
-	      }
+	  xhr.open(method, url, true);
 
-	      return area;
+	  for (var h in headers) {
+	    xhr.setRequestHeader(h, headers[h]);
+	  }
 
-	    case 'Point':
-	    case 'MultiPoint':
-	    case 'LineString':
-	    case 'MultiLineString':
-	      return 0;
+	  xhr.send(data);
+	  return xhr;
+	};
 
-	    case 'GeometryCollection':
-	      for (i = 0; i < _.geometries.length; i++) {
-	        area += geometry(_.geometries[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);
+	};
 
-	      return area;
+	ohauth$1.nonce = function () {
+	  for (var o = ''; o.length < 6;) {
+	    o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
 	  }
-	}
 
-	function polygonArea(coords) {
-	  var area = 0;
+	  return o;
+	};
 
-	  if (coords && coords.length > 0) {
-	    area += Math.abs(ringArea(coords[0]));
+	ohauth$1.authHeader = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+	  }).join(', ');
+	};
 
-	    for (var i = 1; i < coords.length; i++) {
-	      area -= Math.abs(ringArea(coords[i]));
-	    }
-	  }
+	ohauth$1.timestamp = function () {
+	  return ~~(+new Date() / 1000);
+	};
 
-	  return area;
-	}
+	ohauth$1.percentEncode = function (s) {
+	  return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
+	};
+
+	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('&');
+	};
+
+	ohauth$1.signature = function (oauth_secret, token_secret, baseString) {
+	  return sha1.b64_hmac(ohauth$1.percentEncode(oauth_secret) + '&' + ohauth$1.percentEncode(token_secret), baseString);
+	};
 	/**
-	 * 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.
+	 * 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.
 	 *
-	 * 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
+	 * 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.
 	 *
-	 * Returns:
-	 * {float} The approximate signed geodesic area of the polygon in square
-	 *     meters.
+	 * Returned function returns full OAuth header with "OAuth" string in it.
 	 */
 
 
-	function ringArea(coords) {
-	  var p1,
-	      p2,
-	      p3,
-	      lowerIndex,
-	      middleIndex,
-	      upperIndex,
-	      i,
-	      area = 0,
-	      coordsLength = coords.length;
+	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 (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;
+	    if (typeof extra_params === 'string' && extra_params.length > 0) {
+	      extra_params = ohauth$1.stringQs(extra_params);
+	    }
+
+	    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 ohauth_1 = ohauth$1;
+
+	var resolveUrl$1 = {exports: {}};
+
+	(function (module, exports) {
+	  // Copyright 2014 Simon Lydell
+	  // X11 (“MIT”) Licensed. (See LICENSE.)
+	  void function (root, factory) {
+	    {
+	      module.exports = factory();
+	    }
+	  }(commonjsGlobal, function () {
+	    function
+	      /* ...urls */
+	    resolveUrl() {
+	      var numUrls = arguments.length;
+
+	      if (numUrls === 0) {
+	        throw new Error("resolveUrl requires at least one argument; got none.");
+	      }
+
+	      var base = document.createElement("base");
+	      base.href = arguments[0];
+
+	      if (numUrls === 1) {
+	        return base.href;
+	      }
+
+	      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;
 	      }
 
-	      p1 = coords[lowerIndex];
-	      p2 = coords[middleIndex];
-	      p3 = coords[upperIndex];
-	      area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
+	      head.removeChild(base);
+	      return resolved;
 	    }
 
-	    area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
-	  }
+	    return resolveUrl;
+	  });
+	})(resolveUrl$1);
 
-	  return area;
-	}
+	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
+	};
 
-	function rad(_) {
-	  return _ * Math.PI / 180;
+	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;
+	    };
+	  }
 	}
 
-	var geojsonArea = {
-	  geometry: geometry_1,
-	  ring: ring
-	};
+	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
 
-	function toRadians(angleInDegrees) {
-	  return angleInDegrees * Math.PI / 180;
-	}
 
-	function toDegrees(angleInRadians) {
-	  return angleInRadians * 180 / Math.PI;
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$1(arguments, 1);
+	      F.prototype = obj;
+	      return assign.apply(this, [new F()].concat(assignArgsList));
+	    };
+	  }
 	}
 
-	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)];
+	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, '');
+	    };
+	  }
 	}
 
-	function validateCenter(center) {
-	  var validCenterLengths = [2, 3];
+	function bind$1(obj, fn) {
+	  return function () {
+	    return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+	  };
+	}
 
-	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-	    throw new Error("ERROR! Center has to be an array of length two or three");
-	  }
+	function slice$1(arr, index) {
+	  return Array.prototype.slice.call(arr, index || 0);
+	}
 
-	  var _center = _slicedToArray(center, 2),
-	      lng = _center[0],
-	      lat = _center[1];
+	function each$7(obj, fn) {
+	  pluck$1(obj, function (val, key) {
+	    fn(val, key);
+	    return false;
+	  });
+	}
 
-	  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)));
-	  }
+	function map(obj, fn) {
+	  var res = isList$1(obj) ? [] : {};
+	  pluck$1(obj, function (v, k) {
+	    res[k] = fn(v, k);
+	    return false;
+	  });
+	  return res;
+	}
 
-	  if (lng > 180 || lng < -180) {
-	    throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
+	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];
+	      }
+	    }
+	  } else {
+	    for (var key in obj) {
+	      if (obj.hasOwnProperty(key)) {
+	        if (fn(obj[key], key)) {
+	          return obj[key];
+	        }
+	      }
+	    }
 	  }
+	}
 
-	  if (lat > 90 || lat < -90) {
-	    throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
-	  }
+	function isList$1(val) {
+	  return val != null && typeof val != 'function' && typeof val.length == 'number';
 	}
 
-	function validateRadius(radius) {
-	  if (typeof radius !== "number") {
-	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
-	  }
+	function isFunction$1(val) {
+	  return val && {}.toString.call(val) === '[object Function]';
+	}
 
-	  if (radius <= 0) {
-	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
-	  }
+	function isObject$1(val) {
+	  return val && {}.toString.call(val) === '[object Object]';
 	}
 
-	function validateNumberOfSegments(numberOfSegments) {
-	  if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
-	    throw new Error("ERROR! Number of segments has to be a number but was: ".concat(_typeof(numberOfSegments)));
+	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);
 	  }
+	};
+
+	function _warn() {
+	  var _console = typeof console == 'undefined' ? null : console;
 
-	  if (numberOfSegments < 3) {
-	    throw new Error("ERROR! Number of segments has to be at least 3 but was: ".concat(numberOfSegments));
+	  if (!_console) {
+	    return;
 	  }
-	}
 
-	function validateInput(_ref) {
-	  var center = _ref.center,
-	      radius = _ref.radius,
-	      numberOfSegments = _ref.numberOfSegments;
-	  validateCenter(center);
-	  validateRadius(radius);
-	  validateNumberOfSegments(numberOfSegments);
+	  var fn = _console.warn ? _console.warn : _console.log;
+	  fn.apply(_console, arguments);
 	}
 
-	var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-	  var n = numberOfSegments ? numberOfSegments : 32; // validateInput() throws error on invalid input and do nothing on valid input
+	function _createStore(storages, plugins, namespace) {
+	  if (!namespace) {
+	    namespace = '';
+	  }
 
-	  validateInput({
-	    center: center,
-	    radius: radius,
-	    numberOfSegments: numberOfSegments
-	  });
-	  var coordinates = [];
+	  if (storages && !isList(storages)) {
+	    storages = [storages];
+	  }
 
-	  for (var i = 0; i < n; ++i) {
-	    coordinates.push(offset(center, radius, 2 * Math.PI * -i / n));
+	  if (plugins && !isList(plugins)) {
+	    plugins = [plugins];
 	  }
 
-	  coordinates.push(coordinates[0]);
-	  return {
-	    type: "Polygon",
-	    coordinates: [coordinates]
-	  };
-	};
+	  var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+	  var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+	  var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-	// `Number.EPSILON` constant
-	// https://tc39.github.io/ecma262/#sec-number.epsilon
-	_export({ target: 'Number', stat: true }, {
-	  EPSILON: Math.pow(2, -52)
-	});
+	  if (!legalNamespaces.test(namespace)) {
+	    throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+	  }
 
-	/**
-	 * splaytree v3.0.1
-	 * Fast Splay tree for Node and browser
-	 *
-	 * @author Alexander Milevski <info@w8r.name>
-	 * @license MIT
-	 * @preserve
-	 */
-	var Node$1 = function Node(key, data) {
-	  _classCallCheck(this, Node);
-
-	  this.next = null;
-	  this.key = key;
-	  this.data = data;
-	  this.left = null;
-	  this.right = null;
-	};
-	/* follows "An implementation of top-down splaying"
-	 * by D. Sleator <sleator@cs.cmu.edu> March 1992
-	 */
+	  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;
+	      }
+	    },
+	    _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 DEFAULT_COMPARE$1(a, b) {
-	  return a > b ? 1 : a < b ? -1 : 0;
-	}
-	/**
-	 * Simple top down splay, not requiring i to be in the tree t.
-	 */
+	        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.
 
-	function splay(i, t, comparator) {
-	  var N = new Node$1(null, null);
-	  var l = N;
-	  var r = N;
 
-	  while (true) {
-	    var cmp = comparator(i, t.key); //if (i < t.key) {
+	        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
 
-	    if (cmp < 0) {
-	      if (t.left === null) break; //if (i < t.left.key) {
 
-	      if (comparator(i, t.left.key) < 0) {
-	        var y = t.left;
-	        /* rotate right */
+	      var val = '';
 
-	        t.left = y.right;
-	        y.right = t;
-	        t = y;
-	        if (t.left === null) break;
+	      try {
+	        val = JSON.parse(strVal);
+	      } catch (e) {
+	        val = strVal;
 	      }
 
-	      r.left = t;
-	      /* link right */
-
-	      r = t;
-	      t = t.left; //} else if (i > t.key) {
-	    } else if (cmp > 0) {
-	      if (t.right === null) break; //if (i > t.right.key) {
-
-	      if (comparator(i, t.right.key) > 0) {
-	        var _y = t.right;
-	        /* rotate left */
+	      return val !== undefined ? val : defaultVal;
+	    },
+	    _addStorage: function _addStorage(storage) {
+	      if (this.enabled) {
+	        return;
+	      }
 
-	        t.right = _y.left;
-	        _y.left = t;
-	        t = _y;
-	        if (t.right === null) break;
+	      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.
 
-	      l.right = t;
-	      /* link left */
+	      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.
 
-	      l = t;
-	      t = t.right;
-	    } else break;
-	  }
-	  /* assemble */
 
+	      var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+	        return plugin === seenPlugin;
+	      });
 
-	  l.right = t.left;
-	  r.left = t.right;
-	  t.left = N.right;
-	  t.right = N.left;
-	  return t;
-	}
+	      if (seenPlugin) {
+	        return;
+	      }
 
-	function _insert(i, data, t, comparator) {
-	  var node = new Node$1(i, data);
+	      this.plugins.push(plugin); // Check that the plugin is properly formed
 
-	  if (t === null) {
-	    node.left = node.right = null;
-	    return node;
-	  }
+	      if (!isFunction(plugin)) {
+	        throw new Error('Plugins must be function values that return objects');
+	      }
 
-	  t = splay(i, t, comparator);
-	  var cmp = comparator(i, t.key);
+	      var pluginProperties = plugin.call(this);
 
-	  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;
-	  }
+	      if (!isObject(pluginProperties)) {
+	        throw new Error('Plugins must return an object of function properties');
+	      } // Add the plugin function properties to this store instance.
 
-	  return node;
-	}
 
-	function _split(key, v, comparator) {
-	  var left = null;
-	  var right = null;
+	      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.');
+	        }
 
-	  if (v) {
-	    v = splay(key, v, comparator);
-	    var cmp = comparator(v.key, key);
+	        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])');
 
-	    if (cmp === 0) {
-	      left = v.left;
-	      right = v.right;
-	    } else if (cmp < 0) {
-	      right = v.right;
-	      v.right = null;
-	      left = v;
-	    } else {
-	      left = v.left;
-	      v.left = null;
-	      right = v;
+	      this._addStorage(storage);
 	    }
-	  }
-
-	  return {
-	    left: left,
-	    right: right
 	  };
+	  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;
 	}
 
-	function merge$4(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
-	 */
-
+	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
+	};
 
-	function printRow(root, prefix, isTail, out, printNode) {
-	  if (root) {
-	    out("".concat(prefix).concat(isTail ? '└── ' : '├── ').concat(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);
-	  }
+	function localStorage$1() {
+	  return Global$4.localStorage;
 	}
 
-	var Tree = /*#__PURE__*/function () {
-	  function Tree() {
-	    var comparator = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE$1;
+	function read$5(key) {
+	  return localStorage$1().getItem(key);
+	}
 
-	    _classCallCheck(this, Tree);
+	function write$5(key, data) {
+	  return localStorage$1().setItem(key, data);
+	}
 
-	    this._root = null;
-	    this._size = 0;
-	    this._comparator = comparator;
+	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);
 	  }
-	  /**
-	   * Inserts a key, allows duplicates
-	   */
-
-
-	  _createClass(Tree, [{
-	    key: "insert",
-	    value: function insert(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
-	     */
-
-	  }, {
-	    key: "add",
-	    value: function add(key, data) {
-	      var node = new Node$1(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;
-	        }
+	function remove$5(key) {
+	  return localStorage$1().removeItem(key);
+	}
 
-	        this._size++;
-	        this._root = node;
-	      }
-	      return this._root;
-	    }
-	    /**
-	     * @param  {Key} key
-	     * @return {Node|null}
-	     */
+	function clearAll$5() {
+	  return localStorage$1().clear();
+	}
 
-	  }, {
-	    key: "remove",
-	    value: function remove(key) {
-	      this._root = this._remove(key, this._root, this._comparator);
-	    }
-	    /**
-	     * Deletes i from the tree if it's there
-	     */
+	// versions 6 and 7, where no localStorage, etc
+	// is available.
 
-	  }, {
-	    key: "_remove",
-	    value: function _remove(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 {
-	          x = splay(i, t.left, comparator);
-	          x.right = t.right;
-	        }
+	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;
 
-	        this._size--;
-	        return x;
-	      }
+	function read$4(key) {
+	  return globalStorage[key];
+	}
 
-	      return t;
-	      /* It wasn't there */
-	    }
-	    /**
-	     * Removes and returns the node with smallest key
-	     */
+	function write$4(key, data) {
+	  globalStorage[key] = data;
+	}
 
-	  }, {
-	    key: "pop",
-	    value: function pop() {
-	      var node = this._root;
+	function each$4(fn) {
+	  for (var i = globalStorage.length - 1; i >= 0; i--) {
+	    var key = globalStorage.key(i);
+	    fn(globalStorage[key], key);
+	  }
+	}
 
-	      if (node) {
-	        while (node.left) {
-	          node = node.left;
-	        }
+	function remove$4(key) {
+	  return globalStorage.removeItem(key);
+	}
 
-	        this._root = splay(node.key, this._root, this._comparator);
-	        this._root = this._remove(node.key, this._root, this._comparator);
-	        return {
-	          key: node.key,
-	          data: node.data
-	        };
-	      }
+	function clearAll$4() {
+	  each$4(function (key, _) {
+	    delete globalStorage[key];
+	  });
+	}
 
-	      return null;
-	    }
-	    /**
-	     * Find without splaying
-	     */
+	// versions 6 and 7, where no localStorage, sessionStorage, etc
+	// is available.
 
-	  }, {
-	    key: "findStatic",
-	    value: function findStatic(key) {
-	      var current = this._root;
-	      var compare = this._comparator;
+	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
+	};
+	var storageName = 'storejs';
+	var doc$1 = Global$2.document;
 
-	      while (current) {
-	        var cmp = compare(key, current.key);
-	        if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
-	      }
+	var _withStorageEl = _makeIEStorageElFunction();
 
-	      return null;
-	    }
-	  }, {
-	    key: "find",
-	    value: function find(key) {
-	      if (this._root) {
-	        this._root = splay(key, this._root, this._comparator);
-	        if (this._comparator(key, this._root.key) !== 0) return null;
-	      }
+	var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
-	      return this._root;
-	    }
-	  }, {
-	    key: "contains",
-	    value: function contains(key) {
-	      var current = this._root;
-	      var compare = this._comparator;
+	function write$3(unfixedKey, data) {
+	  if (disable) {
+	    return;
+	  }
 
-	      while (current) {
-	        var cmp = compare(key, current.key);
-	        if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
-	      }
+	  var fixedKey = fixKey(unfixedKey);
 
-	      return false;
-	    }
-	  }, {
-	    key: "forEach",
-	    value: function forEach(visitor, ctx) {
-	      var current = this._root;
-	      var Q = [];
-	      /* Initialize stack s */
-
-	      var done = false;
-
-	      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;
-	        }
-	      }
+	  _withStorageEl(function (storageEl) {
+	    storageEl.setAttribute(fixedKey, data);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	      return this;
-	    }
-	    /**
-	     * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-	     */
+	function read$3(unfixedKey) {
+	  if (disable) {
+	    return;
+	  }
 
-	  }, {
-	    key: "range",
-	    value: function range(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);
+	  var fixedKey = fixKey(unfixedKey);
+	  var res = null;
 
-	          if (cmp > 0) {
-	            break;
-	          } else if (compare(node.key, low) >= 0) {
-	            if (fn.call(ctx, node)) return this; // stop if smth is returned
-	          }
+	  _withStorageEl(function (storageEl) {
+	    res = storageEl.getAttribute(fixedKey);
+	  });
 
-	          node = node.right;
-	        }
-	      }
+	  return res;
+	}
 
-	      return this;
-	    }
-	    /**
-	     * Returns array of keys
-	     */
+	function each$3(callback) {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
 
-	  }, {
-	    key: "keys",
-	    value: function keys() {
-	      var keys = [];
-	      this.forEach(function (_ref) {
-	        var key = _ref.key;
-	        return keys.push(key);
-	      });
-	      return keys;
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      var attr = attributes[i];
+	      callback(storageEl.getAttribute(attr.name), attr.name);
 	    }
-	    /**
-	     * Returns array of all the data in the nodes
-	     */
+	  });
+	}
 
-	  }, {
-	    key: "values",
-	    value: function values() {
-	      var values = [];
-	      this.forEach(function (_ref2) {
-	        var data = _ref2.data;
-	        return values.push(data);
-	      });
-	      return values;
-	    }
-	  }, {
-	    key: "min",
-	    value: function min() {
-	      if (this._root) return this.minNode(this._root).key;
-	      return null;
-	    }
-	  }, {
-	    key: "max",
-	    value: function max() {
-	      if (this._root) return this.maxNode(this._root).key;
-	      return null;
-	    }
-	  }, {
-	    key: "minNode",
-	    value: function minNode() {
-	      var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-	      if (t) while (t.left) {
-	        t = t.left;
-	      }
-	      return t;
-	    }
-	  }, {
-	    key: "maxNode",
-	    value: function maxNode() {
-	      var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-	      if (t) while (t.right) {
-	        t = t.right;
-	      }
-	      return t;
-	    }
-	    /**
-	     * Returns node at given index
-	     */
+	function remove$3(unfixedKey) {
+	  var fixedKey = fixKey(unfixedKey);
 
-	  }, {
-	    key: "at",
-	    value: function at(index) {
-	      var current = this._root;
-	      var done = false;
-	      var i = 0;
-	      var Q = [];
+	  _withStorageEl(function (storageEl) {
+	    storageEl.removeAttribute(fixedKey);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	      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;
-	        }
-	      }
+	function clearAll$3() {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
+	    storageEl.load(storageName);
 
-	      return null;
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      storageEl.removeAttribute(attributes[i].name);
 	    }
-	  }, {
-	    key: "next",
-	    value: function next(d) {
-	      var root = this._root;
-	      var successor = null;
-
-	      if (d.right) {
-	        successor = d.right;
 
-	        while (successor.left) {
-	          successor = successor.left;
-	        }
-
-	        return successor;
-	      }
+	    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 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;
-	      }
+	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-	      return successor;
-	    }
-	  }, {
-	    key: "prev",
-	    value: function prev(d) {
-	      var root = this._root;
-	      var predecessor = null;
+	function fixKey(key) {
+	  return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+	}
 
-	      if (d.left !== null) {
-	        predecessor = d.left;
+	function _makeIEStorageElFunction() {
+	  if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+	    return null;
+	  }
 
-	        while (predecessor.right) {
-	          predecessor = predecessor.right;
-	        }
+	  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.
 
-	        return predecessor;
-	      }
+	  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;
+	  }
 
-	      var comparator = this._comparator;
+	  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
 
-	      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;
-	        }
-	      }
+	    storageOwner.appendChild(storageEl);
+	    storageEl.addBehavior('#default#userData');
+	    storageEl.load(storageName);
+	    storeFunction.apply(this, args);
+	    storageOwner.removeChild(storageEl);
+	    return;
+	  };
+	}
 
-	      return predecessor;
-	    }
-	  }, {
-	    key: "clear",
-	    value: function clear() {
-	      this._root = null;
-	      this._size = 0;
-	      return this;
-	    }
-	  }, {
-	    key: "toList",
-	    value: function toList() {
-	      return _toList(this._root);
-	    }
-	    /**
-	     * Bulk-load items. Both array have to be same size
-	     */
+	// doesn't work but cookies do. This implementation is adopted from
+	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-	  }, {
-	    key: "load",
-	    value: function load(keys) {
-	      var values = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-	      var presort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
-	      var size = keys.length;
-	      var comparator = this._comparator; // sort if needed
-
-	      if (presort) sort$1(keys, values, 0, size - 1, comparator);
-
-	      if (this._root === null) {
-	        // empty tree
-	        this._root = loadRecursive$1(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);
-	      }
+	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
+	};
+	var doc = Global$1.document;
 
-	      return this;
-	    }
-	  }, {
-	    key: "isEmpty",
-	    value: function isEmpty() {
-	      return this._root === null;
-	    }
-	  }, {
-	    key: "toString",
-	    value: function toString() {
-	      var printNode = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : function (n) {
-	        return String(n.key);
-	      };
-	      var out = [];
-	      printRow(this._root, '', true, function (v) {
-	        return out.push(v);
-	      }, printNode);
-	      return out.join('');
-	    }
-	  }, {
-	    key: "update",
-	    value: function update(key, newKey, newData) {
-	      var comparator = this._comparator;
+	function read$2(key) {
+	  if (!key || !_has(key)) {
+	    return null;
+	  }
 
-	      var _split2 = _split(key, this._root, comparator),
-	          left = _split2.left,
-	          right = _split2.right;
+	  var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+	  return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
+	}
 
-	      if (comparator(key, newKey) < 0) {
-	        right = _insert(newKey, newData, right, comparator);
-	      } else {
-	        left = _insert(newKey, newData, left, comparator);
-	      }
+	function each$2(callback) {
+	  var cookies = doc.cookie.split(/; ?/g);
 
-	      this._root = merge$4(left, right, comparator);
-	    }
-	  }, {
-	    key: "split",
-	    value: function split(key) {
-	      return _split(key, this._root, this._comparator);
-	    }
-	  }, {
-	    key: "size",
-	    get: function get() {
-	      return this._size;
-	    }
-	  }, {
-	    key: "root",
-	    get: function get() {
-	      return this._root;
+	  for (var i = cookies.length - 1; i >= 0; i--) {
+	    if (!trim(cookies[i])) {
+	      continue;
 	    }
-	  }]);
-
-	  return Tree;
-	}();
-
-	function loadRecursive$1(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$1(key, data);
-	    node.left = loadRecursive$1(keys, values, start, middle);
-	    node.right = loadRecursive$1(keys, values, middle + 1, end);
-	    return node;
+	    var kvp = cookies[i].split('=');
+	    var key = unescape(kvp[0]);
+	    var val = unescape(kvp[1]);
+	    callback(val, key);
 	  }
-
-	  return null;
 	}
 
-	function createList(keys, values) {
-	  var head = new Node$1(null, null);
-	  var p = head;
-
-	  for (var i = 0; i < keys.length; i++) {
-	    p = p.next = new Node$1(keys[i], values[i]);
+	function write$2(key, data) {
+	  if (!key) {
+	    return;
 	  }
 
-	  p.next = null;
-	  return head.next;
+	  doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
 	}
 
-	function _toList(root) {
-	  var current = root;
-	  var Q = [];
-	  var done = false;
-	  var head = new Node$1(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;
-	    }
+	function remove$2(key) {
+	  if (!key || !_has(key)) {
+	    return;
 	  }
 
-	  p.next = null; // that'll work even if the tree was empty
+	  doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+	}
 
-	  return head.next;
+	function clearAll$2() {
+	  each$2(function (_, key) {
+	    remove$2(key);
+	  });
 	}
 
-	function sortedListToBST(list, start, end) {
-	  var size = end - start;
+	function _has(key) {
+	  return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+	}
 
-	  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;
-	  }
+	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
+	};
 
-	  return null;
+	function sessionStorage() {
+	  return Global.sessionStorage;
 	}
 
-	function mergeLists(l1, l2, compare) {
-	  var head = new Node$1(null, null); // dummy
-
-	  var p = head;
-	  var p1 = l1;
-	  var p2 = l2;
+	function read$1(key) {
+	  return sessionStorage().getItem(key);
+	}
 
-	  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;
-	    }
+	function write$1(key, data) {
+	  return sessionStorage().setItem(key, data);
+	}
 
-	    p = p.next;
+	function each$1(fn) {
+	  for (var i = sessionStorage().length - 1; i >= 0; i--) {
+	    var key = sessionStorage().key(i);
+	    fn(read$1(key), key);
 	  }
+	}
 
-	  if (p1 !== null) {
-	    p.next = p1;
-	  } else if (p2 !== null) {
-	    p.next = p2;
-	  }
+	function remove$1(key) {
+	  return sessionStorage().removeItem(key);
+	}
 
-	  return head.next;
+	function clearAll$1() {
+	  return sessionStorage().clear();
 	}
 
-	function sort$1(keys, values, left, right, compare) {
-	  if (left >= right) return;
-	  var pivot = keys[left + right >> 1];
-	  var i = left - 1;
-	  var j = right + 1;
+	// 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.
 
-	  while (true) {
-	    do {
-	      i++;
-	    } while (compare(keys[i], pivot) < 0);
+	var memoryStorage_1 = {
+	  name: 'memoryStorage',
+	  read: read,
+	  write: write,
+	  each: each,
+	  remove: remove,
+	  clearAll: clearAll
+	};
+	var memoryStorage = {};
 
-	    do {
-	      j--;
-	    } while (compare(keys[j], pivot) > 0);
+	function read(key) {
+	  return memoryStorage[key];
+	}
 
-	    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;
+	function write(key, data) {
+	  memoryStorage[key] = data;
+	}
+
+	function each(callback) {
+	  for (var key in memoryStorage) {
+	    if (memoryStorage.hasOwnProperty(key)) {
+	      callback(memoryStorage[key], key);
+	    }
 	  }
+	}
 
-	  sort$1(keys, values, left, j, compare);
-	  sort$1(keys, values, j + 1, right, compare);
+	function remove(key) {
+	  delete memoryStorage[key];
 	}
 
-	function _classCallCheck$1(instance, Constructor) {
-	  if (!(instance instanceof Constructor)) {
-	    throw new TypeError("Cannot call a class as a function");
-	  }
+	function clearAll(key) {
+	  memoryStorage = {};
 	}
 
-	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);
-	  }
-	}
+	var all = [// Listed in order of usage preference
+	localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
+
+	/* 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.
+
+	/*jslint
+	    eval, for, this
+	*/
 
-	function _createClass$1(Constructor, protoProps, staticProps) {
-	  if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
-	  if (staticProps) _defineProperties$1(Constructor, staticProps);
-	  return Constructor;
+	/*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 = {};
 	}
-	/**
-	 * A bounding box has the format:
-	 *
-	 *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
-	 *
-	 */
-
-
-	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 */
 
+	(function () {
 
-	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
+	  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 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
+	  function f(n) {
+	    // Format integers to have at least two digits.
+	    return n < 10 ? "0" + n : n;
+	  }
 
-	  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
+	  function this_value() {
+	    return this.valueOf();
+	  }
 
-	  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
-	 */
+	  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;
+	    };
 
+	    Boolean.prototype.toJSON = this_value;
+	    Number.prototype.toJSON = this_value;
+	    String.prototype.toJSON = this_value;
+	  }
 
-	var epsilon$2 = Number.EPSILON; // IE Polyfill
+	  var gap;
+	  var indent;
+	  var meta;
+	  var rep;
 
-	if (epsilon$2 === undefined) epsilon$2 = Math.pow(2, -52);
-	var EPSILON_SQ = epsilon$2 * epsilon$2;
-	/* FLP comparator */
+	  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 + "\"";
+	  }
 
-	var cmp = function cmp(a, b) {
-	  // check if they're both 0
-	  if (-epsilon$2 < a && a < epsilon$2) {
-	    if (-epsilon$2 < b && b < epsilon$2) {
-	      return 0;
-	    }
-	  } // check if they're flp equal
+	  function str(key, holder) {
+	    // Produce a string from holder[key].
+	    var i; // The loop counter.
 
+	    var k; // The member key.
 
-	  var ab = a - b;
+	    var v; // The member value.
 
-	  if (ab * ab < EPSILON_SQ * a * b) {
-	    return 0;
-	  } // normal comparison
+	    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.
 
+	    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.
 
-	  return a < b ? -1 : 1;
-	};
-	/**
-	 * 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.
-	 */
 
+	    if (typeof rep === "function") {
+	      value = rep.call(holder, key, value);
+	    } // What happens next depends on the value's type.
 
-	var PtRounder = /*#__PURE__*/function () {
-	  function PtRounder() {
-	    _classCallCheck$1(this, PtRounder);
 
-	    this.reset();
-	  }
+	    switch (_typeof(value)) {
+	      case "string":
+	        return quote(value);
 
-	  _createClass$1(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)
-	      };
-	    }
-	  }]);
+	      case "number":
+	        // JSON numbers must be finite. Encode non-finite numbers as null.
+	        return isFinite(value) ? String(value) : "null";
 
-	  return PtRounder;
-	}();
+	      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 CoordRounder = /*#__PURE__*/function () {
-	  function CoordRounder() {
-	    _classCallCheck$1(this, CoordRounder);
+	      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.
 
-	    this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
 
-	    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).
+	        gap += indent;
+	        partial = []; // Is the value an array?
 
+	        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;
 
-	  _createClass$1(CoordRounder, [{
-	    key: "round",
-	    value: function round(coord) {
-	      var node = this.tree.add(coord);
-	      var prevNode = this.tree.prev(node);
+	          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 (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
-	        this.tree.remove(coord);
-	        return prevNode.key;
-	      }
 
-	      var nextNode = this.tree.next(node);
+	          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.
 
-	      if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
-	        this.tree.remove(coord);
-	        return nextNode.key;
-	      }
 
-	      return coord;
-	    }
-	  }]);
+	        if (rep && _typeof(rep) === "object") {
+	          length = rep.length;
 
-	  return CoordRounder;
-	}(); // singleton available by import
+	          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 {
+	          // 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);
 
-	var rounder = new PtRounder();
-	/* Cross Product of two vectors with first point at origin */
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
+	            }
+	          }
+	        } // Join all of the member texts together, separated with commas,
+	        // and wrap them in braces.
 
-	var crossProduct$1 = function crossProduct(a, b) {
-	  return a.x * b.y - a.y * b.x;
-	};
-	/* Dot Product of two vectors with first point at origin */
 
+	        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 dotProduct$1 = function dotProduct(a, b) {
-	  return a.x * b.x + a.y * b.y;
-	};
-	/* Comparator for two vectors with same starting point */
 
+	  if (typeof JSON.stringify !== "function") {
+	    meta = {
+	      // table of character substitutions
+	      "\b": "\\b",
+	      "\t": "\\t",
+	      "\n": "\\n",
+	      "\f": "\\f",
+	      "\r": "\\r",
+	      "\"": "\\\"",
+	      "\\": "\\\\"
+	    };
 
-	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$1(v1, v2);
-	  return cmp(kross, 0);
-	};
+	    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 length = function length(v) {
-	  return Math.sqrt(dotProduct$1(v, v));
-	};
-	/* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
+	      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.
 
+	      } else if (typeof space === "string") {
+	        indent = space;
+	      } // If there is a replacer, it must be a function or an array.
+	      // Otherwise, throw an error.
 
-	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$1(vAngle, vBase) / length(vAngle) / length(vBase);
-	};
-	/* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */
 
+	      rep = replacer;
 
-	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$1(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. */
+	      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 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. */
+	      return str("", {
+	        "": value
+	      });
+	    };
+	  } // If the JSON object does not yet have a parse method, give it one.
 
 
-	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. */
+	  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;
 
+	      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];
 
-	var intersection$1 = 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
+	        if (value && _typeof(value) === "object") {
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = walk(value, k);
 
-	  var kross = crossProduct$1(v1, v2);
-	  if (kross == 0) return null;
-	  var ve = {
-	    x: pt2.x - pt1.x,
-	    y: pt2.y - pt1.y
-	  };
-	  var d1 = crossProduct$1(ve, v1) / kross;
-	  var d2 = crossProduct$1(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+	              if (v !== undefined) {
+	                value[k] = v;
+	              } else {
+	                delete value[k];
+	              }
+	            }
+	          }
+	        }
 
-	  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
-	  };
-	};
+	        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.
 
-	var SweepEvent$1 = /*#__PURE__*/function () {
-	  _createClass$1(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
 
-	      if (a.point !== b.point) a.link(b); // favor right events over left
+	      text = String(text);
+	      rx_dangerous.lastIndex = 0;
 
-	      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
+	      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.
 
-	      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)
+	      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;
+	      } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
-	  function SweepEvent(point, isLeft) {
-	    _classCallCheck$1(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
+	      throw new SyntaxError("JSON.parse");
+	    };
 	  }
+	})();
 
-	  _createClass$1(SweepEvent, [{
-	    key: "link",
-	    value: function link(other) {
-	      if (other.point === this.point) {
-	        throw new Error('Tried to link already linked events');
-	      }
-
-	      var otherEvents = other.point.events;
+	var json2 = json2Plugin;
 
-	      for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
-	        var evt = otherEvents[i];
-	        this.point.events.push(evt);
-	        evt.point = this.point;
-	      }
+	function json2Plugin() {
+	  return {};
+	}
 
-	      this.checkForConsuming();
-	    }
-	    /* Do a pass over our linked events and check to see if any pair
-	     * of segments match, and should be consumed. */
+	var engine = storeEngine;
+	var storages = all;
+	var plugins = [json2];
+	var store_legacy = engine.createStore(storages, plugins);
 
-	  }, {
-	    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;
+	var immutable = extend;
+	var hasOwnProperty = Object.prototype.hasOwnProperty;
 
-	      for (var i = 0; i < numEvents; i++) {
-	        var evt1 = this.point.events[i];
-	        if (evt1.segment.consumedBy !== undefined) continue;
+	function extend() {
+	  var target = {};
 
-	        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);
-	        }
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
+
+	    for (var key in source) {
+	      if (hasOwnProperty.call(source, key)) {
+	        target[key] = source[key];
 	      }
 	    }
-	  }, {
-	    key: "getAvailableLinkedEvents",
-	    value: function getAvailableLinkedEvents() {
-	      // point.events is always of length 2 or greater
-	      var events = [];
+	  }
 
-	      for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
-	        var evt = this.point.events[i];
+	  return target;
+	}
 
-	        if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
-	          events.push(evt);
-	        }
-	      }
+	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.
 
-	      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.
-	     */
+	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
 
-	  }, {
-	    key: "getLeftmostComparator",
-	    value: function getLeftmostComparator(baseEvent) {
-	      var _this = this;
+	  oauth.authenticated = function () {
+	    return !!(token('oauth_token') && token('oauth_token_secret'));
+	  };
 
-	      var cache = new Map();
+	  oauth.logout = function () {
+	    token('oauth_token', '');
+	    token('oauth_token_secret', '');
+	    token('oauth_request_token_secret', '');
+	    return oauth;
+	  }; // TODO: detect lack of click event
 
-	      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)
-	        });
-	      };
 
-	      return function (a, b) {
-	        if (!cache.has(a)) fillCache(a);
-	        if (!cache.has(b)) fillCache(b);
+	  oauth.authenticate = function (callback) {
+	    if (oauth.authenticated()) return callback();
+	    oauth.logout(); // ## Getting a request token
 
-	        var _cache$get = cache.get(a),
-	            asine = _cache$get.sine,
-	            acosine = _cache$get.cosine;
+	    var params = timenonce(getAuth(o)),
+	        url = o.url + '/oauth/request_token';
+	    params.oauth_signature = ohauth.signature(o.oauth_secret, '', ohauth.baseString('POST', url, params));
 
-	        var _cache$get2 = cache.get(b),
-	            bsine = _cache$get2.sine,
-	            bcosine = _cache$get2.cosine; // both on or above x-axis
+	    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.
 
-	        if (asine >= 0 && bsine >= 0) {
-	          if (acosine < bcosine) return 1;
-	          if (acosine > bcosine) return -1;
-	          return 0;
-	        } // both below x-axis
 
+	    ohauth.xhr('POST', url, params, null, {}, reqTokenDone);
+	    o.loading();
 
-	        if (asine < 0 && bsine < 0) {
-	          if (acosine < bcosine) return -1;
-	          if (acosine > bcosine) return 1;
-	          return 0;
-	        } // one above x-axis, one below
+	    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)
+	      });
 
+	      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.
 
-	        if (bsine < asine) return -1;
-	        if (bsine > asine) return 1;
-	        return 0;
-	      };
+
+	    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.
+
+
+	    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();
 	    }
-	  }]);
 
-	  return SweepEvent;
-	}(); // segments and sweep events when all else is identical
+	    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);
+	    }
+	  };
 
+	  oauth.bringPopupWindowToFront = function () {
+	    var brougtPopupToFront = false;
 
-	var segmentId = 0;
+	    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)
+	    }
 
-	var Segment = /*#__PURE__*/function () {
-	  _createClass$1(Segment, null, [{
-	    key: "compare",
+	    return brougtPopupToFront;
+	  };
 
-	    /* 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
+	  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`
 
-	      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?
+	      ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
+	    }
 
-	      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?
+	    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);
+	    }
 
-	        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 ?
+	    get_access_token(oauth_token);
+	  }; // # xhr
+	  //
+	  // A single XMLHttpRequest wrapper that does authenticated calls if the
+	  // user has logged in.
 
-	        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?)
 
-	        return -1;
-	      } // is left endpoint of segment A the right-more?
+	  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 (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?
+	      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));
+	      }
 
-	        var bCmpALeft = b.comparePoint(a.leftSE.point);
-	        if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
+	      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);
+	    }
 
-	        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?)
+	    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
 
-	        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
 
+	  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 (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?
+	  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
 
-	      if (arx < brx) {
-	        var _bCmpARight = b.comparePoint(a.rightSE.point);
+	    o.loading = o.loading || function () {};
 
-	        if (_bCmpARight !== 0) return _bCmpARight;
-	      } // is the B right endpoint more left-more?
+	    o.done = o.done || function () {};
 
+	    return oauth.preauth(o);
+	  }; // 'stamp' an authentication object from `getAuth()`
+	  // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+	  // and timestamp
 
-	      if (arx > brx) {
-	        var _aCmpBRight = a.comparePoint(b.rightSE.point);
 
-	        if (_aCmpBRight < 0) return 1;
-	        if (_aCmpBRight > 0) return -1;
-	      }
+	  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
 
-	      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
 
+	  var token;
 
-	      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
+	  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 = {};
 
-	      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
+	    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
 
-	      if (a.id < b.id) return -1;
-	      if (a.id > b.id) return 1; // identical segment, ie a === b
 
-	      return 0;
-	    }
-	    /* Warning: a reference to ringWindings input will be stored,
-	     *  and possibly will be later modified */
+	  function getAuth(o) {
+	    return {
+	      oauth_consumer_key: o.oauth_consumer_key,
+	      oauth_signature_method: 'HMAC-SHA1'
+	    };
+	  } // potentially pre-authorize
 
-	  }]);
 
-	  function Segment(leftSE, rightSE, rings, windings) {
-	    _classCallCheck$1(this, Segment);
+	  oauth.options(o);
+	  return oauth;
+	};
 
-	    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
-	  }
+	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
 
-	  _createClass$1(Segment, [{
-	    key: "replaceRightSE",
+	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: {}
+	};
 
-	    /* 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;
-	    }
-	  }, {
-	    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 */
+	var _cachedApiStatus;
 
-	  }, {
-	    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)
-	     */
+	var _changeset = {};
 
-	  }, {
-	    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.
+	var _deferred = new Set();
 
-	      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 _connectionID = 1;
+	var _tileZoom = 16;
+	var _noteZoom = 12;
 
+	var _rateLimitError;
 
-	      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 _userChangesets;
 
-	      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.
-	     */
+	var _userDetails;
 
-	  }, {
-	    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 _off; // set a default but also load this from the API status
 
-	      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?
+	var _maxWayNodes = 2000;
 
-	      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
+	function authLoading() {
+	  dispatch$2.call('authLoading');
+	}
 
-	        return null;
-	      } // does this left endpoint matches (other doesn't)
+	function authDone() {
+	  dispatch$2.call('authDone');
+	}
 
+	function abortRequest$2(controllerOrXHR) {
+	  if (controllerOrXHR) {
+	    controllerOrXHR.abort();
+	  }
+	}
 
-	      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
+	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];
+	  });
+	}
 
-	        return tlp;
-	      } // does other left endpoint matches (this doesn't)
+	function getLoc(attrs) {
+	  var lon = attrs.lon && attrs.lon.value;
+	  var lat = attrs.lat && attrs.lat.value;
+	  return [parseFloat(lon), parseFloat(lat)];
+	}
 
+	function getNodes(obj) {
+	  var elems = obj.getElementsByTagName('nd');
+	  var nodes = new Array(elems.length);
 
-	      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
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i].attributes.ref.value;
+	  }
 
+	  return nodes;
+	}
 
-	        return olp;
-	      } // trivial intersection on right endpoints
+	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];
+	  }
 
-	      if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
+	  return nodes;
+	}
 
-	      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
+	function getTags(obj) {
+	  var elems = obj.getElementsByTagName('tag');
+	  var tags = {};
 
-	      var pt = intersection$1(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
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    tags[attrs.k.value] = attrs.v.value;
+	  }
 
-	      if (pt === null) return null; // is the intersection found between the lines not on the segments?
+	  return tags;
+	}
 
-	      if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
+	function getMembers(obj) {
+	  var elems = obj.getElementsByTagName('member');
+	  var members = new Array(elems.length);
 
-	      return rounder.round(pt.x, pt.y);
-	    }
-	    /**
-	     * 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
-	     */
+	  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
+	    };
+	  }
 
-	  }, {
-	    key: "split",
-	    value: function split(point) {
-	      var newEvents = [];
-	      var alreadyLinked = point.events !== undefined;
-	      var newLeftSE = new SweepEvent$1(point, true);
-	      var newRightSE = new SweepEvent$1(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
+	  return members;
+	}
 
-	      if (SweepEvent$1.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
-	        newSeg.swapEvents();
-	      }
+	function getMembersJSON(obj) {
+	  var elems = obj.members;
+	  var members = new Array(elems.length);
 
-	      if (SweepEvent$1.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
+	  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;
+	}
 
+	function getVisible(attrs) {
+	  return !attrs.visible || attrs.visible.value !== 'false';
+	}
 
-	      if (alreadyLinked) {
-	        newLeftSE.checkForConsuming();
-	        newRightSE.checkForConsuming();
-	      }
+	function parseComments(comments) {
+	  var parsedComments = []; // for each comment
 
-	      return newEvents;
-	    }
-	    /* Swap which event is left and right */
+	  for (var i = 0; i < comments.length; i++) {
+	    var comment = comments[i];
 
-	  }, {
-	    key: "swapEvents",
-	    value: function swapEvents() {
-	      var tmpEvt = this.rightSE;
-	      this.rightSE = this.leftSE;
-	      this.leftSE = tmpEvt;
-	      this.leftSE.isLeft = true;
-	      this.rightSE.isLeft = false;
+	    if (comment.nodeName === 'comment') {
+	      var childNodes = comment.childNodes;
+	      var parsedComment = {};
 
-	      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 */
+	      for (var j = 0; j < childNodes.length; j++) {
+	        var node = childNodes[j];
+	        var nodeName = node.nodeName;
+	        if (nodeName === '#text') continue;
+	        parsedComment[nodeName] = node.textContent;
 
-	  }, {
-	    key: "consume",
-	    value: function consume(other) {
-	      var consumer = this;
-	      var consumee = other;
+	        if (nodeName === 'uid') {
+	          var uid = node.textContent;
 
-	      while (consumer.consumedBy) {
-	        consumer = consumer.consumedBy;
+	          if (uid && !_userCache.user[uid]) {
+	            _userCache.toLoad[uid] = true;
+	          }
+	        }
 	      }
 
-	      while (consumee.consumedBy) {
-	        consumee = consumee.consumedBy;
+	      if (parsedComment) {
+	        parsedComments.push(parsedComment);
 	      }
+	    }
+	  }
 
-	      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
-
-	      if (cmp > 0) {
-	        var tmp = consumer;
-	        consumer = consumee;
-	        consumee = tmp;
-	      } // make sure a segment doesn't consume it's prev
+	  return parsedComments;
+	}
 
+	function encodeNoteRtree(note) {
+	  return {
+	    minX: note.loc[0],
+	    minY: note.loc[1],
+	    maxX: note.loc[0],
+	    maxY: note.loc[1],
+	    data: note
+	  };
+	}
 
-	      if (consumer.prev === consumee) {
-	        var _tmp = consumer;
-	        consumer = consumee;
-	        consumee = _tmp;
-	      }
+	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'
+	    };
+	  }
+	};
 
-	      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);
+	function parseJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
 
-	        if (index === -1) {
-	          consumer.rings.push(ring);
-	          consumer.windings.push(winding);
-	        } else consumer.windings[index] += winding;
-	      }
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
+	  }
 
-	      consumee.rings = null;
-	      consumee.windings = null;
-	      consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
+	  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);
 
-	      consumee.leftSE.consumedBy = consumer.leftSE;
-	      consumee.rightSE.consumedBy = consumer.rightSE;
-	    }
-	    /* The first segment previous segment chain that is in the result */
+	    var results = [];
+	    var result;
 
-	  }, {
-	    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;
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
-	  }, {
-	    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
 
-	      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);
+	    callback(null, results);
+	  });
 
-	        if (index === -1) {
-	          ringsAfter.push(ring);
-	          windingsAfter.push(winding);
-	        } else windingsAfter[index] += winding;
-	      } // calcualte polysAfter
+	  _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);
 
-	      var polysAfter = [];
-	      var polysExclude = [];
+	    if (options.skipSeen) {
+	      if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	      for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
-	        if (windingsAfter[_i] === 0) continue; // non-zero rule
+	      _tileCache.seen[uid] = true;
+	    }
 
-	        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);
+	    return parser(child, uid);
+	  }
+	}
 
-	          var _index = polysAfter.indexOf(_ring.poly);
+	function parseUserJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
 
-	          if (_index !== -1) polysAfter.splice(_index, 1);
-	        }
-	      } // calculate multiPolysAfter
+	  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);
 
-	      for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
-	        var mp = polysAfter[_i2].multiPoly;
-	        if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
-	      }
+	    var results = [];
+	    var result;
 
-	      return this._afterState;
+	    for (var i = 0; i < objs.length; i++) {
+	      result = parseObj(objs[i]);
+	      if (result) results.push(result);
 	    }
-	    /* Is this segment part of the final result? */
-
-	  }, {
-	    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;
-	          }
+	    callback(null, results);
+	  });
 
-	        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;
+	  _deferred.add(handle);
 
-	            if (mpsBefore.length < mpsAfter.length) {
-	              least = mpsBefore.length;
-	              most = mpsAfter.length;
-	            } else {
-	              least = mpsAfter.length;
-	              most = mpsBefore.length;
-	            }
+	  function parseObj(obj) {
+	    var uid = obj.user.id && obj.user.id.toString();
 
-	            this._isInResult = most === operation.numMultiPolys && least < most;
-	            break;
-	          }
+	    if (options.skipSeen && _userCache.user[uid]) {
+	      delete _userCache.toLoad[uid];
+	      return null;
+	    }
 
-	        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;
-	          }
+	    var user = jsonparsers.user(obj.user, uid);
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	}
 
-	        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;
-	            };
+	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
 
-	            this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
-	            break;
-	          }
+	    var coincident = false;
+	    var epsilon = 0.00001;
 
-	        default:
-	          throw new Error("Unrecognized operation type found ".concat(operation.type));
+	    do {
+	      if (coincident) {
+	        props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
 	      }
 
-	      return this._isInResult;
-	    }
-	  }], [{
-	    key: "fromRing",
-	    value: function fromRing(pt1, pt2, ring) {
-	      var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
+	      var bbox = geoExtent(props.loc).bbox();
+	      coincident = _noteCache.rtree.search(bbox).length;
+	    } while (coincident); // parse note contents
 
-	      var cmpPts = SweepEvent$1.comparePoints(pt1, pt2);
 
-	      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, "]"));
+	    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
 
-	      var leftSE = new SweepEvent$1(leftPt, true);
-	      var rightSE = new SweepEvent$1(rightPt, false);
-	      return new Segment(leftSE, rightSE, [ring], [winding]);
+	      if (nodeName === 'comments') {
+	        props[nodeName] = parseComments(node.childNodes);
+	      } else {
+	        props[nodeName] = node.textContent;
+	      }
 	    }
-	  }]);
 
-	  return Segment;
-	}();
+	    var note = new osmNote(props);
+	    var item = encodeNoteRtree(note);
+	    _noteCache.note[note.id] = note;
 
-	var RingIn = /*#__PURE__*/function () {
-	  function RingIn(geomRing, poly, isExterior) {
-	    _classCallCheck$1(this, RingIn);
+	    _noteCache.rtree.insert(item);
 
-	    if (!Array.isArray(geomRing) || geomRing.length === 0) {
-	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    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');
+
+	    if (img && img[0] && img[0].getAttribute('href')) {
+	      user.image_url = img[0].getAttribute('href');
 	    }
 
-	    this.poly = poly;
-	    this.isExterior = isExterior;
-	    this.segments = [];
+	    var changesets = obj.getElementsByTagName('changesets');
 
-	    if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
-	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+	      user.changesets_count = changesets[0].getAttribute('count');
 	    }
 
-	    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 blocks = obj.getElementsByTagName('blocks');
 
-	    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');
-	      }
+	    if (blocks && blocks[0]) {
+	      var received = blocks[0].getElementsByTagName('received');
 
-	      var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
+	      if (received && received[0] && received[0].getAttribute('active')) {
+	        user.active_blocks = received[0].getAttribute('active');
+	      }
+	    }
 
-	      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
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	};
 
+	function parseXML(xml, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
 
-	    if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
-	      this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
-	    }
+	  if (!xml || !xml.childNodes) {
+	    return callback({
+	      message: 'No XML',
+	      status: -1
+	    });
 	  }
 
-	  _createClass$1(RingIn, [{
-	    key: "getSweepEvents",
-	    value: function getSweepEvents() {
-	      var sweepEvents = [];
+	  var root = xml.childNodes[0];
+	  var children = root.childNodes;
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
 
-	      for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
-	        var segment = this.segments[i];
-	        sweepEvents.push(segment.leftSE);
-	        sweepEvents.push(segment.rightSE);
-	      }
+	    var results = [];
+	    var result;
 
-	      return sweepEvents;
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
-	  }]);
 
-	  return RingIn;
-	}();
+	    callback(null, results);
+	  });
 
-	var PolyIn = /*#__PURE__*/function () {
-	  function PolyIn(geomPoly, multiPoly) {
-	    _classCallCheck$1(this, PolyIn);
+	  _deferred.add(handle);
 
-	    if (!Array.isArray(geomPoly)) {
-	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-	    }
+	  function parseChild(child) {
+	    var parser = parsers[child.nodeName];
+	    if (!parser) return null;
+	    var uid;
 
-	    this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
+	    if (child.nodeName === 'user') {
+	      uid = child.attributes.id.value;
 
-	    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
+	      if (options.skipSeen && _userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        return null;
 	      }
-	    };
-	    this.interiorRings = [];
+	    } else if (child.nodeName === 'note') {
+	      uid = child.getElementsByTagName('id')[0].textContent;
+	    } else {
+	      uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
 
-	    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);
+	      if (options.skipSeen) {
+	        if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+
+	        _tileCache.seen[uid] = true;
+	      }
 	    }
 
-	    this.multiPoly = multiPoly;
+	    return parser(child, uid);
 	  }
+	} // replace or remove note from rtree
 
-	  _createClass$1(PolyIn, [{
-	    key: "getSweepEvents",
-	    value: function getSweepEvents() {
-	      var sweepEvents = this.exteriorRing.getSweepEvents();
-
-	      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 sweepEvents;
-	    }
-	  }]);
+	function updateRtree(item, replace) {
+	  _noteCache.rtree.remove(item, function isEql(a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	  return PolyIn;
-	}();
+	  if (replace) {
+	    _noteCache.rtree.insert(item);
+	  }
+	}
 
-	var MultiPolyIn = /*#__PURE__*/function () {
-	  function MultiPolyIn(geom, isSubject) {
-	    _classCallCheck$1(this, MultiPolyIn);
+	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();
+	      }
 
-	    if (!Array.isArray(geom)) {
-	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	      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);
 	    }
+	  };
+	}
 
-	    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.
-	    }
+	var serviceOsm = {
+	  init: function init() {
+	    utilRebind(this, dispatch$2, 'on');
+	  },
+	  reset: function reset() {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    this.polys = [];
-	    this.bbox = {
-	      ll: {
-	        x: Number.POSITIVE_INFINITY,
-	        y: Number.POSITIVE_INFINITY
-	      },
-	      ur: {
-	        x: Number.NEGATIVE_INFINITY,
-	        y: Number.NEGATIVE_INFINITY
-	      }
+	      _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/' + encodeURIComponent(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;
 
-	    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);
-	    }
-
-	    this.isSubject = isSubject;
-	  }
+	    function done(err, payload) {
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	  _createClass$1(MultiPolyIn, [{
-	    key: "getSweepEvents",
-	    value: function getSweepEvents() {
-	      var sweepEvents = [];
+	      var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+	      // Logout and retry the request..
 
-	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
-	        var polySweepEvents = this.polys[i].getSweepEvents();
+	      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();
+	        }
 
-	        for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
-	          sweepEvents.push(polySweepEvents[j]);
+	        if (callback) {
+	          if (err) {
+	            return callback(err);
+	          } else {
+	            if (path.indexOf('.json') !== -1) {
+	              return parseJSON(payload, callback, options);
+	            } else {
+	              return parseXML(payload, callback, options);
+	            }
+	          }
 	        }
 	      }
-
-	      return sweepEvents;
 	    }
-	  }]);
-
-	  return MultiPolyIn;
-	}();
 
-	var RingOut = /*#__PURE__*/function () {
-	  _createClass$1(RingOut, null, [{
-	    key: "factory",
+	    if (this.authenticated()) {
+	      return oauth.xhr({
+	        method: 'GET',
+	        path: path
+	      }, done);
+	    } else {
+	      var url = urlroot + path;
+	      var controller = new AbortController();
+	      var fn;
 
-	    /* 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 = [];
+	      if (path.indexOf('.json') !== -1) {
+	        fn = d3_json;
+	      } else {
+	        fn = d3_xml;
+	      }
 
-	      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 */
+	      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
 
-	        while (true) {
-	          prevEvent = event;
-	          event = nextEvent;
-	          events.push(event);
-	          /* Is the ring complete? */
+	        var match = err.message.match(/^\d{3}/);
 
-	          if (event.point === startingPoint) break;
+	        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
 
-	          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. */
+	      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 (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 */
+	    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;
 
-	            if (availableLEs.length === 1) {
-	              nextEvent = availableLEs[0].otherSE;
-	              break;
-	            }
-	            /* We must have an intersection. Check for a completed loop */
+	      if (err) {
+	        return callback(err, changeset);
+	      }
 
+	      _changeset.open = changesetID;
+	      changeset = changeset.update({
+	        id: changesetID
+	      }); // Upload the changeset..
 
-	            var indexLE = null;
+	      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));
+	    }
 
-	            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 */
+	    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 (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;
+	      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'
 	            }
-	            /* register the intersection */
-
-
-	            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));
+	        }, function () {
+	          return true;
+	        });
 	      }
-
-	      return ringsOut;
 	    }
-	  }]);
+	  },
+	  // 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);
+	      }
+	    });
 
-	  function RingOut(events) {
-	    _classCallCheck$1(this, RingOut);
+	    if (cached.length || !this.authenticated()) {
+	      callback(undefined, cached);
+	      if (!this.authenticated()) return; // require auth
+	    }
 
-	    this.events = events;
+	    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));
 
-	    for (var i = 0, iMax = events.length; i < iMax; i++) {
-	      events[i].segment.ringOut = this;
+	    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]);
 	    }
 
-	    this.poly = null;
-	  }
-
-	  _createClass$1(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];
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/' + uid + '.json'
+	    }, wrapcb(this, done, _connectionID));
 
-	      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
+	    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));
 
-	      if (points.length === 1) return null; // check if the starting point is necessary
+	    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);
+	    }
 
-	      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 = [];
+	    this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-	      for (var _i = iStart; _i != iEnd; _i += step) {
-	        orderedPoints.push([points[_i].x, points[_i].y]);
+	    function gotDetails(err, user) {
+	      if (err) {
+	        return callback(err);
 	      }
 
-	      return orderedPoints;
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/changesets?user=' + user.id
+	      }, wrapcb(this, done, _connectionID));
 	    }
-	  }, {
-	    key: "isExteriorRing",
-	    value: function isExteriorRing() {
-	      if (this._isExteriorRing === undefined) {
-	        var enclosing = this.enclosingRing();
-	        this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
-	      }
 
-	      return this._isExteriorRing;
-	    }
-	  }, {
-	    key: "enclosingRing",
-	    value: function enclosingRing() {
-	      if (this._enclosingRing === undefined) {
-	        this._enclosingRing = this._calcEnclosingRing();
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
 	      }
 
-	      return this._enclosingRing;
+	      _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);
 	    }
-	    /* Returns the ring that encloses this one, if any */
-
-	  }, {
-	    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$1.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
-	      }
-
-	      var prevSeg = leftMostEvt.segment.prevInResult();
-	      var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+	  },
+	  // 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);
+	    });
 
-	      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
+	    function done(err, xml) {
+	      if (err) {
+	        // the status is null if no response could be retrieved
+	        return callback(err, null);
+	      } // update blocklists
 
-	        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
 
-	        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 elements = xml.getElementsByTagName('blacklist');
+	      var regexes = [];
 
+	      for (var i = 0; i < elements.length; i++) {
+	        var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-	        prevSeg = prevPrevSeg.prevInResult();
-	        prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+	        if (regexString) {
+	          try {
+	            var regex = new RegExp(regexString);
+	            regexes.push(regex);
+	          } catch (e) {
+	            /* noop */
+	          }
+	        }
 	      }
-	    }
-	  }]);
-
-	  return RingOut;
-	}();
-
-	var PolyOut = /*#__PURE__*/function () {
-	  function PolyOut(exteriorRing) {
-	    _classCallCheck$1(this, PolyOut);
-
-	    this.exteriorRing = exteriorRing;
-	    exteriorRing.poly = this;
-	    this.interiorRings = [];
-	  }
-
-	  _createClass$1(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
-
-	      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);
+	      if (regexes.length) {
+	        _imageryBlocklists = regexes;
 	      }
 
-	      return geom;
+	      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);
 	    }
-	  }]);
-
-	  return PolyOut;
-	}();
-
-	var MultiPolyOut = /*#__PURE__*/function () {
-	  function MultiPolyOut(rings) {
-	    _classCallCheck$1(this, MultiPolyOut);
 
-	    this.rings = rings;
-	    this.polys = this._composePolys(rings);
-	  }
+	    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
 
-	  _createClass$1(MultiPolyOut, [{
-	    key: "getGeom",
-	    value: function getGeom() {
-	      var geom = [];
+	    var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	      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 hadRequests = hasInflightRequests(_tileCache);
+	    abortUnwantedRequests(_tileCache, tiles);
 
-	        if (polyGeom === null) continue;
-	        geom.push(polyGeom);
-	      }
+	    if (hadRequests && !hasInflightRequests(_tileCache)) {
+	      dispatch$2.call('loaded'); // stop the spinner
+	    } // issue new requests..
 
-	      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);
-	        }
-	      }
+	    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;
 
-	      return polys;
+	    if (!hasInflightRequests(_tileCache)) {
+	      dispatch$2.call('loading'); // start the spinner
 	    }
-	  }]);
-
-	  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 SweepLine = /*#__PURE__*/function () {
-	  function SweepLine(queue) {
-	    var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
 
-	    _classCallCheck$1(this, SweepLine);
+	    var path = '/api/0.6/map.json?bbox=';
+	    var options = {
+	      skipSeen: true
+	    };
+	    _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
-	    this.queue = queue;
-	    this.tree = new Tree(comparator);
-	    this.segments = [];
-	  }
+	    function tileCallback(err, parsed) {
+	      delete _tileCache.inflight[tile.id];
 
-	  _createClass$1(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
+	      if (!err) {
+	        delete _tileCache.toLoad[tile.id];
+	        _tileCache.loaded[tile.id] = true;
+	        var bbox = tile.extent.bbox();
+	        bbox.id = tile.id;
 
-	      if (event.consumedBy) {
-	        if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
-	        return newEvents;
+	        _tileCache.rtree.insert(bbox);
 	      }
 
-	      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
-
-	      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
-
-
-	      while (nextSeg === undefined) {
-	        nextNode = this.tree.next(nextNode);
-	        if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+	      if (callback) {
+	        callback(err, Object.assign({
+	          data: parsed
+	        }, tile));
 	      }
 
-	      if (event.isLeft) {
-	        // Check for intersections against the previous segment in the sweep line
-	        var prevMySplitter = null;
+	      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=';
 
-	        if (prevSeg) {
-	          var prevInter = prevSeg.getIntersection(segment);
+	    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
 
-	          if (prevInter !== null) {
-	            if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
 
-	            if (!prevSeg.isAnEndpoint(prevInter)) {
-	              var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
+	    var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	              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
+	    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];
 
-	        var nextMySplitter = null;
+	        if (!err) {
+	          _noteCache.loaded[tile.id] = true;
+	        }
 
-	        if (nextSeg) {
-	          var nextInter = nextSeg.getIntersection(segment);
+	        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);
+	    }
 
-	          if (nextInter !== null) {
-	            if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
 
-	            if (!nextSeg.isAnEndpoint(nextInter)) {
-	              var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+	    if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-	              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().
+	    var comment = note.newComment;
 
+	    if (note.newCategory && note.newCategory !== 'None') {
+	      comment += ' #' + note.newCategory;
+	    }
 
-	        if (prevMySplitter !== null || nextMySplitter !== null) {
-	          var mySplitter = null;
-	          if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
-	            var cmpSplitters = SweepEvent$1.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
+	    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));
 
-	          this.queue.remove(segment.rightSE);
-	          newEvents.push(segment.rightSE);
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	          var _newEventsFromSplit2 = segment.split(mySplitter);
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	          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);
+	      this.removeNote(note);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
 	        } else {
-	          // done with left event
-	          this.segments.push(segment);
-	          segment.prev = prevSeg;
+	          return callback(undefined, results[0]);
 	        }
-	      } 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);
+	      }, 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);
+	    }
 
-	              for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
-	                newEvents.push(_newEventsFromSplit4[_i4]);
-	              }
-	            }
-	          }
-	        }
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
 
-	        this.tree.remove(segment);
-	      }
+	    var action;
 
-	      return newEvents;
+	    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
 	    }
-	    /* Safely split a segment that is currently in the datastructures
-	     * IE - a segment other than the one that is currently being processed. */
 
-	  }, {
-	    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
+	    var path = '/api/0.6/notes/' + note.id + '/' + action;
 
-	      if (seg.consumedBy === undefined) this.tree.insert(seg);
-	      return newEvents;
+	    if (note.newComment) {
+	      path += '?' + utilQsString({
+	        text: note.newComment
+	      });
 	    }
-	  }]);
 
-	  return SweepLine;
-	}();
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	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;
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	var Operation = /*#__PURE__*/function () {
-	  function Operation() {
-	    _classCallCheck$1(this, Operation);
-	  }
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	  _createClass$1(Operation, [{
-	    key: "run",
-	    value: function run(type, geom, moreGeoms) {
-	      operation.type = type;
-	      rounder.reset();
-	      /* Convert inputs to MultiPoly objects */
 
-	      var multipolys = [new MultiPolyIn(geom, true)];
+	      this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-	      for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
-	        multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+	      if (action === 'close') {
+	        _noteCache.closed[note.id] = true;
+	      } else if (action === 'reopen') {
+	        delete _noteCache.closed[note.id];
 	      }
 
-	      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. */
-
-	      if (operation.type === 'difference') {
-	        // in place removal
-	        var subject = multipolys[0];
-	        var _i = 1;
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
+	        }
+	      }, 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
 
-	        while (_i < multipolys.length) {
-	          if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
+	    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
 	        }
-	      }
-	      /* BBox optimization for intersection operation
-	       * If we can find any pair of multipolygons whose bbox does not overlap,
-	       * then the result will be empty. */
+	      });
+	      return target;
+	    }
 
+	    if (!arguments.length) {
+	      return {
+	        tile: cloneCache(_tileCache),
+	        note: cloneCache(_noteCache),
+	        user: cloneCache(_userCache)
+	      };
+	    } // access caches directly for testing (e.g., loading notes rtree)
 
-	      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];
 
-	          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 */
+	    if (obj === 'get') {
+	      return {
+	        tile: _tileCache,
+	        note: _noteCache,
+	        user: _userCache
+	      };
+	    }
 
+	    if (obj.tile) {
+	      _tileCache = obj.tile;
+	      _tileCache.inflight = {};
+	    }
 
-	      var queue = new Tree(SweepEvent$1.compare);
+	    if (obj.note) {
+	      _noteCache = obj.note;
+	      _noteCache.inflight = {};
+	      _noteCache.inflightPost = {};
+	    }
 
-	      for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
-	        var sweepEvents = multipolys[_i3].getSweepEvents();
+	    if (obj.user) {
+	      _userCache = obj.user;
+	    }
 
-	        for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
-	          queue.insert(sweepEvents[_j]);
+	    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 (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.');
-	          }
-	        }
+	    function done(err, res) {
+	      if (err) {
+	        if (callback) callback(err);
+	        return;
 	      }
-	      /* Pass the sweep line over those endpoints */
 
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	      var sweepLine = new SweepLine(queue);
-	      var prevQueueSize = queue.size;
-	      var node = queue.pop();
+	      _rateLimitError = undefined;
+	      dispatch$2.call('change');
+	      if (callback) callback(err, res);
+	      that.userChangesets(function () {}); // eagerly load user details/changesets
+	    }
 
-	      while (node) {
-	        var evt = node.key;
+	    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
 
-	        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.');
-	        }
+	    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();
+	  }
+	};
 
-	        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.');
-	        }
+	var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+	var _inflight$1 = {};
+	var _wikibaseCache = {};
+	var _localeIDs = {
+	  en: false
+	};
 
-	        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.');
-	        }
+	var debouncedRequest$1 = debounce(request$1, 500, {
+	  leading: false
+	});
 
-	        var newEvents = sweepLine.process(evt);
+	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);
+	  });
+	}
 
-	        for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
-	          var _evt = newEvents[_i4];
-	          if (_evt.consumedBy === undefined) queue.insert(_evt);
-	        }
+	var serviceOsmWikibase = {
+	  init: function init() {
+	    _inflight$1 = {};
+	    _wikibaseCache = {};
+	    _localeIDs = {};
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$1).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$1 = {};
+	  },
 
-	        prevQueueSize = queue.size;
-	        node = queue.pop();
-	      } // free some memory we don't need anymore
+	  /**
+	   * 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;
 
-	      rounder.reset();
-	      /* Collect and compile segments we're keeping into a multipolygon */
+	    if (result) {
+	      var datavalue = result.mainsnak.datavalue;
+	      return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+	    } else {
+	      return undefined;
+	    }
+	  },
+
+	  /**
+	   * 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;
 
-	      var ringsOut = RingOut.factory(sweepLine.segments);
-	      var result = new MultiPolyOut(ringsOut);
-	      return result.getGeom();
+	    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);
+	        }
+	      });
 	    }
-	  }]);
-
-	  return Operation;
-	}(); // singleton available by import
-
-
-	var operation = new Operation();
-
-	var union$1 = 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];
-	  }
-
-	  return operation.run('union', geom, moreGeoms);
-	};
 
-	var intersection$1$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];
-	  }
+	    if (rtypeSitelink) {
+	      if (_wikibaseCache[rtypeSitelink]) {
+	        result.rtype = _wikibaseCache[rtypeSitelink];
+	      } else {
+	        titles.push(rtypeSitelink);
+	      }
+	    }
 
-	  return operation.run('intersection', geom, moreGeoms);
-	};
+	    if (keySitelink) {
+	      if (_wikibaseCache[keySitelink]) {
+	        result.key = _wikibaseCache[keySitelink];
+	      } else {
+	        titles.push(keySitelink);
+	      }
+	    }
 
-	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 (tagSitelink) {
+	      if (_wikibaseCache[tagSitelink]) {
+	        result.tag = _wikibaseCache[tagSitelink];
+	      } else {
+	        titles.push(tagSitelink);
+	      }
+	    }
 
-	  return operation.run('xor', geom, moreGeoms);
-	};
+	    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 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];
-	  }
 
-	  return operation.run('difference', subjectGeom, clippingGeoms);
-	};
+	    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 index$1 = {
-	  union: union$1,
-	  intersection: intersection$1$1,
-	  xor: xor,
-	  difference: difference
-	};
+	    };
+	    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;
 
-	var geojsonPrecision = createCommonjsModule(function (module) {
-	  (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 1 * e.toFixed(extrasPrecision);
+	            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
+	            }
 	          }
 	        });
-	      }
 
-	      function multi(l) {
-	        return l.map(point);
-	      }
+	        if (localeSitelink) {
+	          // If locale ID is not found, store false to prevent repeated queries
+	          that.addLocale(params.langCodes[0], localeID);
+	        }
 
-	      function poly(p) {
-	        return p.map(multi);
+	        callback(null, result);
 	      }
-
-	      function multiPoly(m) {
-	        return m.map(poly);
+	    });
+	  },
+	  //
+	  // 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;
 	      }
 
-	      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;
+	      var entity = data.rtype || data.tag || data.key;
 
-	          case "Polygon":
-	          case "MultiLineString":
-	            obj.coordinates = poly(obj.coordinates);
-	            return obj;
+	      if (!entity) {
+	        callback('No entity');
+	        return;
+	      }
 
-	          case "MultiPolygon":
-	            obj.coordinates = multiPoly(obj.coordinates);
-	            return obj;
+	      var i;
+	      var description;
 
-	          case "GeometryCollection":
-	            obj.geometries = obj.geometries.map(geometry);
-	            return obj;
+	      for (i in langCodes) {
+	        var _code = langCodes[i];
 
-	          default:
-	            return {};
+	        if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+	          description = entity.descriptions[_code];
+	          break;
 	        }
 	      }
 
-	      function feature(obj) {
-	        obj.geometry = geometry(obj.geometry);
-	        return obj;
-	      }
-
-	      function featureCollection(f) {
-	        f.features = f.features.map(feature);
-	        return f;
-	      }
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	      function geometryCollection(g) {
-	        g.geometries = g.geometries.map(geometry);
-	        return g;
-	      }
+	      var result = {
+	        title: entity.title,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+	      }; // add image
 
-	      if (!t) {
-	        return t;
-	      }
+	      if (entity.claims) {
+	        var imageroot;
+	        var image = that.claimToValue(entity, 'P4', langCodes[0]);
 
-	      switch (t.type) {
-	        case "Feature":
-	          return feature(t);
+	        if (image) {
+	          imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        } else {
+	          image = that.claimToValue(entity, 'P28', langCodes[0]);
 
-	        case "GeometryCollection":
-	          return geometryCollection(t);
+	          if (image) {
+	            imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+	          }
+	        }
 
-	        case "FeatureCollection":
-	          return featureCollection(t);
+	        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.
 
-	        case "Point":
-	        case "LineString":
-	        case "Polygon":
-	        case "MultiPoint":
-	        case "MultiPolygon":
-	        case "MultiLineString":
-	          return geometry(t);
 
-	        default:
-	          return t;
-	      }
-	    }
+	      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];
 
-	    module.exports = parse;
-	    module.exports.parse = parse;
-	  })();
-	});
+	      for (i in wikis) {
+	        var wiki = wikis[i];
 
-	function isObject$4(obj) {
-	  return _typeof(obj) === 'object' && obj !== null;
-	}
+	        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);
 
-	function forEach(obj, cb) {
-	  if (Array.isArray(obj)) {
-	    obj.forEach(cb);
-	  } else if (isObject$4(obj)) {
-	    Object.keys(obj).forEach(function (key) {
-	      var val = obj[key];
-	      cb(val, key);
-	    });
-	  }
-	}
+	          if (info) {
+	            result.wiki = info;
+	            break;
+	          }
+	        }
 
-	function getTreeDepth(obj) {
-	  var depth = 0;
+	        if (result.wiki) break;
+	      }
 
-	  if (Array.isArray(obj) || isObject$4(obj)) {
-	    forEach(obj, function (val) {
-	      if (Array.isArray(val) || isObject$4(val)) {
-	        var tmpDepth = getTreeDepth(val);
+	      callback(null, result); // Helper method to get wiki info if a given language exists
 
-	        if (tmpDepth > depth) {
-	          depth = tmpDepth;
+	      function getWikiInfo(wiki, langCode, tKey) {
+	        if (wiki && wiki[langCode]) {
+	          return {
+	            title: wiki[langCode],
+	            text: tKey,
+	            url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+	          };
 	        }
 	      }
 	    });
-	    return depth + 1;
+	  },
+	  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;
 	  }
+	};
 
-	  return depth;
-	}
+	var jsonpCache = {};
+	window.jsonpCache = jsonpCache;
+	function jsonpRequest(url, callback) {
+	  var request = {
+	    abort: function abort() {}
+	  };
 
-	function stringify(obj, options) {
-	  options = options || {};
-	  var indent = JSON.stringify([1], null, get$5(options, 'indent', 2)).slice(2, -3);
-	  var addMargin = get$5(options, 'margins', false);
-	  var addArrayMargin = get$5(options, 'arrayMargins', false);
-	  var addObjectMargin = get$5(options, 'objectMargins', false);
-	  var maxLength = indent === '' ? Infinity : get$5(options, 'maxLength', 80);
-	  var maxNesting = get$5(options, 'maxNesting', Infinity);
-	  return function _stringify(obj, currentIndent, reserved) {
-	    if (obj && typeof obj.toJSON === 'function') {
-	      obj = obj.toJSON();
+	  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);
+
+	      request.abort = function () {
+	        window.clearTimeout(t);
+	      };
 	    }
 
-	    var string = JSON.stringify(obj);
+	    return request;
+	  }
 
-	    if (string === undefined) {
-	      return string;
+	  function rand() {
+	    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+	    var c = '';
+	    var i = -1;
+
+	    while (++i < 15) {
+	      c += chars.charAt(Math.floor(Math.random() * 52));
 	    }
 
-	    var length = maxLength - currentIndent.length - reserved;
-	    var treeDepth = getTreeDepth(obj);
+	    return c;
+	  }
 
-	    if (treeDepth <= maxNesting && string.length <= length) {
-	      var prettified = prettify(string, {
-	        addMargin: addMargin,
-	        addArrayMargin: addArrayMargin,
-	        addObjectMargin: addObjectMargin
-	      });
+	  function create(url) {
+	    var e = url.match(/callback=(\w+)/);
+	    var c = e ? e[1] : rand();
 
-	      if (prettified.length <= length) {
-	        return prettified;
+	    jsonpCache[c] = function (data) {
+	      if (jsonpCache[c]) {
+	        callback(data);
 	      }
-	    }
 
-	    if (isObject$4(obj)) {
-	      var nextIndent = currentIndent + indent;
-	      var items = [];
-	      var delimiters;
+	      finalize();
+	    };
 
-	      var comma = function comma(array, index) {
-	        return index === array.length - 1 ? 0 : 1;
-	      };
+	    function finalize() {
+	      delete jsonpCache[c];
+	      script.remove();
+	    }
 
-	      if (Array.isArray(obj)) {
-	        for (var index = 0; index < obj.length; index++) {
-	          items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
-	        }
+	    request.abort = finalize;
+	    return 'jsonpCache.' + c;
+	  }
 
-	        delimiters = '[]';
-	      } else {
-	        Object.keys(obj).forEach(function (key, index, array) {
-	          var keyPart = JSON.stringify(key) + ': ';
+	  var cb = create(url);
+	  var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	  return request;
+	}
 
-	          var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
+	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
 
-	          if (value !== undefined) {
-	            items.push(keyPart + value);
-	          }
-	        });
-	        delimiters = '{}';
-	      }
+	var maxHfov = 90; // zoom out degrees
 
-	      if (items.length > 0) {
-	        return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
-	      }
-	    }
+	var defaultHfov = 45;
+	var _hires = false;
+	var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-	    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 _currScene = 0;
 
+	var _ssCache;
 
-	var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
+	var _pannellumViewer;
 
-	function prettify(string, options) {
-	  options = options || {};
-	  var tokens = {
-	    '{': '{',
-	    '}': '}',
-	    '[': '[',
-	    ']': ']',
-	    ',': ', ',
-	    ':': ': '
-	  };
+	var _sceneOptions = {
+	  showFullscreenCtrl: false,
+	  autoLoad: true,
+	  compass: true,
+	  yaw: 0,
+	  minHfov: minHfov,
+	  maxHfov: maxHfov,
+	  hfov: defaultHfov,
+	  type: 'cubemap',
+	  cubeMap: []
+	};
 
-	  if (options.addMargin || options.addObjectMargin) {
-	    tokens['{'] = '{ ';
-	    tokens['}'] = ' }';
-	  }
+	var _loadViewerPromise;
+	/**
+	 * abortRequest().
+	 */
 
-	  if (options.addMargin || options.addArrayMargin) {
-	    tokens['['] = '[ ';
-	    tokens[']'] = ' ]';
-	  }
 
-	  return string.replace(stringOrChar, function (match, string) {
-	    return string ? match : tokens[match];
-	  });
+	function abortRequest$1(i) {
+	  i.abort();
 	}
+	/**
+	 * localeTimeStamp().
+	 */
 
-	function get$5(options, name, defaultValue) {
-	  return name in options ? options[name] : defaultValue;
+
+	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.
+	 */
 
-	var jsonStringifyPrettyCompact = stringify;
 
-	var _default$3 = /*#__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;
+	function loadTiles(which, url, projection, margin) {
+	  var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    _classCallCheck(this, _default);
+	  var cache = _ssCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	    // 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.
+	    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.
+	 */
 
-	    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`
+	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
 
-	        var id = feature.id || props.id;
-	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // ensure `id` exists and is lowercase
+	    bubbles.shift();
+	    var features = bubbles.map(function (bubble) {
+	      if (cache.points[bubble.id]) return null; // skip duplicates
+
+	      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
 
-	        id = id.toLowerCase();
-	        feature.id = id;
-	        props.id = id; // ensure `area` property exists
+	      if (bubble.pr === undefined) {
+	        cache.leaders.push(bubble.id);
+	      }
 
-	        if (!props.area) {
-	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
+	    cache.rtree.load(features);
+	    connectSequences();
 
-	          props.area = Number(area.toFixed(2));
-	        }
+	    if (which === 'bubbles') {
+	      dispatch$1.call('loadedImages');
+	    }
+	  });
+	} // call this sometimes to connect the bubbles into sequences
 
-	        _this._cache[id] = feature;
-	      });
-	    } // Replace CountryCoder world geometry to be a polygon covering the world.
 
+	function connectSequences() {
+	  var cache = _ssCache.bubbles;
+	  var keepLeaders = [];
 
-	    var world = _cloneDeep(feature('Q2'));
+	  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.
 
-	    world.geometry = {
-	      type: 'Polygon',
-	      coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+	    var sequence = {
+	      key: bubble.key,
+	      bubbles: []
 	    };
-	    world.id = 'Q2';
-	    world.properties.id = 'Q2';
-	    world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²
-
-	    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
-	  //
-
-
-	  _createClass(_default, [{
-	    key: "validateLocation",
-	    value: 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
-	          };
-	        }
-	      } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
-	        // a .geojson filename?
-	        var _id = location.toLowerCase();
-
-	        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$1 = feature(location);
+	    var complete = false;
 
-	        if (feature$1) {
-	          // 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$1.properties.wikidata;
-	          return {
-	            type: 'countrycoder',
-	            location: location,
-	            id: _id2
-	          };
-	        }
-	      }
+	    do {
+	      sequence.bubbles.push(bubble);
+	      seen[bubble.key] = true;
 
-	      if (this._strict) {
-	        throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+	      if (bubble.ne === undefined) {
+	        complete = true;
 	      } else {
-	        return null;
+	        bubble = cache.points[bubble.ne]; // advance to next
 	      }
-	    } // 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
-	    //
+	    } while (bubble && !seen[bubble.key] && !complete);
 
-	  }, {
-	    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 (complete) {
+	      _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
 
-	      if (this._cache[id]) {
-	        return Object.assign(valid, {
-	          feature: this._cache[id]
-	        });
-	      } // a [lon,lat] coordinate pair?
+	      for (var j = 0; j < sequence.bubbles.length; j++) {
+	        sequence.bubbles[j].sequenceKey = sequence.key;
+	      } // create a GeoJSON LineString
 
 
-	      if (valid.type === 'point') {
-	        var RADIUS = 25000; // meters
+	      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 EDGES = 10;
-	        var PRECISION = 3;
-	        var area = Math.PI * RADIUS * RADIUS / 1e6; // m² to km²
 
-	        var feature$1 = this._cache[id] = geojsonPrecision({
-	          type: 'Feature',
-	          id: id,
-	          properties: {
-	            id: 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 = _cloneDeep(feature(id));
+	  cache.leaders = keepLeaders;
+	}
+	/**
+	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+	 */
 
-	        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.
-	        // 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.geometry ? _feature : null;
-	          var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
-	          _feature.geometry = aggregate.geometry;
-	        } // ensure `area` property exists
+	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
 
 
-	        if (!props.area) {
-	          var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+	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]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	          props.area = Number(_area.toFixed(2));
-	        } // ensure `id` property exists
 
+	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()
+	 */
 
-	        _feature.id = id;
-	        props.id = id;
-	        this._cache[id] = _feature;
-	        return Object.assign(valid, {
-	          feature: _feature
-	        });
-	      }
 
-	      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
-	    //
+	function loadImage(imgInfo) {
+	  return new Promise(function (resolve) {
+	    var img = new Image();
 
-	  }, {
-	    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);
+	    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'
+	      });
+	    };
 
-	      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
+	    img.onerror = function () {
+	      resolve({
+	        data: imgInfo,
+	        status: 'error'
+	      });
+	    };
 
+	    img.setAttribute('crossorigin', '');
+	    img.src = imgInfo.url;
+	  });
+	}
+	/**
+	 * loadCanvas()
+	 */
 
-	      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(',') + ']';
-	      }
+	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 {
-	        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
-	    //
 
-	  }, {
-	    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
+	function loadFaces(faceGroup) {
+	  return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+	    return {
+	      status: 'loadFaces done'
+	    };
+	  });
+	}
 
-	      if (this._cache[id]) {
-	        return Object.assign(valid, {
-	          feature: this._cache[id]
-	        });
-	      }
+	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
 
-	      var resolver = this.resolveLocation.bind(this);
-	      var include = (locationSet.include || []).map(resolver).filter(Boolean);
-	      var exclude = (locationSet.exclude || []).map(resolver).filter(Boolean); // return quickly if it's a single included location..
 
-	      if (include.length === 1 && exclude.length === 0) {
-	        return Object.assign(valid, {
-	          feature: include[0].feature
-	        });
-	      } // calculate unions
+	  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);
+	}
 
+	function qkToXY(qk) {
+	  var x = 0;
+	  var y = 0;
+	  var scale = 256;
 
-	      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); // calculate difference, update `area` and return result
+	  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;
+	  }
 
-	      var resultGeoJSON = excludeGeoJSON ? _clip(includeGeoJSON, excludeGeoJSON, 'DIFFERENCE') : includeGeoJSON;
-	      var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
+	  return [x, y];
+	}
 
-	      resultGeoJSON.id = id;
-	      resultGeoJSON.properties = {
-	        id: id,
-	        area: Number(area.toFixed(2))
-	      };
-	      this._cache[id] = resultGeoJSON;
-	      return Object.assign(valid, {
-	        feature: resultGeoJSON
-	      });
-	    } // strict
-	    //
+	function getQuadKeys() {
+	  var dim = _resolution / 256;
+	  var quadKeys;
 
-	  }, {
-	    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
+	  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'];
+	  }
 
-	  }, {
-	    key: "cache",
-	    value: function cache() {
-	      return this._cache;
-	    } // stringify
-	    // convenience method to prettyStringify the given object
+	  return quadKeys;
+	}
 
-	  }, {
-	    key: "stringify",
-	    value: function stringify(obj, options) {
-	      return jsonStringifyPrettyCompact(obj, options);
+	var serviceStreetside = {
+	  /**
+	   * init() initialize streetside.
+	   */
+	  init: function init() {
+	    if (!_ssCache) {
+	      this.reset();
 	    }
-	  }]);
 
-	  return _default;
-	}(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+	    this.event = utilRebind(this, dispatch$1, 'on');
+	  },
 
-	function _clip(a, b, which) {
-	  var fn = {
-	    UNION: index$1.union,
-	    DIFFERENCE: index$1.difference
-	  }[which];
-	  var coords = fn(a.geometry.coordinates, b.geometry.coordinates);
-	  return {
-	    type: 'Feature',
-	    properties: {},
-	    geometry: {
-	      type: whichType(coords),
-	      coordinates: coords
+	  /**
+	   * reset() reset the cache.
+	   */
+	  reset: function reset() {
+	    if (_ssCache) {
+	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
 	    }
-	  }; // is this a Polygon or a MultiPolygon?
 
-	  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';
-	  }
-	} // Reduce an array of locations into a single GeoJSON feature
+	    _ssCache = {
+	      bubbles: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        points: {},
+	        leaders: []
+	      },
+	      sequences: {}
+	    };
+	  },
+
+	  /**
+	   * 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
 
+	    _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+	      var key = d.data.sequenceKey;
 
-	function _locationReducer(accumulator, location) {
-	  /* eslint-disable no-console, no-invalid-this */
-	  var result;
+	      if (key && !seen[key]) {
+	        seen[key] = true;
+	        results.push(_ssCache.sequences[key].geojson);
+	      }
+	    });
 
-	  try {
-	    var resolved = this.resolveLocation(location);
+	    return results;
+	  },
+
+	  /**
+	   * 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;
 
-	    if (!resolved || !resolved.feature) {
-	      console.warn("Warning:  Couldn't resolve location \"".concat(location, "\""));
-	      return accumulator;
-	    }
+	    var sceneID = _currScene.toString();
 
-	    result = !accumulator ? resolved.feature : _clip(accumulator, resolved.feature, 'UNION');
-	  } catch (e) {
-	    console.warn("Warning:  Error resolving location \"".concat(location, "\""));
-	    console.warn(e);
-	    result = accumulator;
-	  }
+	    var options = {
+	      'default': {
+	        firstScene: sceneID
+	      },
+	      scenes: {}
+	    };
+	    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
 
-	  return result;
-	  /* eslint-enable no-console, no-invalid-this */
-	}
+	    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)
 
-	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.
+	    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
 
+	    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 _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 t = timer(function (elapsed) {
+	        dispatch$1.call('viewerChanged');
 
-	var _oci = null;
-	function uiSuccess(context) {
-	  var MAXEVENTS = 2;
-	  var dispatch$1 = dispatch('cancel');
+	        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
 
-	  var _changeset;
+	    wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-	  var _location;
+	    context.ui().photoviewer.on('resize.streetside', function () {
+	      if (_pannellumViewer) {
+	        _pannellumViewer.resize();
+	      }
+	    });
+	    _loadViewerPromise = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	  ensureOSMCommunityIndex(); // start fetching the data
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	  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 _default$3(vals[1]);
-	      var ociFeatures = {};
-	      Object.values(ociResources).forEach(function (resource) {
-	        var feature = loco.resolveLocationSet(resource.locationSet).feature;
-	        var ociFeature = ociFeatures[feature.id];
+	        if (loadedCount === 2) resolve();
+	      }
 
-	        if (!ociFeature) {
-	          ociFeature = JSON.parse(JSON.stringify(feature)); // deep clone
+	      var head = select('head'); // load streetside pannellum viewer css
 
-	          ociFeature.properties.resourceIDs = new Set();
-	          ociFeatures[feature.id] = ociFeature;
-	        }
+	      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
 
-	        ociFeature.properties.resourceIDs.add(resource.id);
+	      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();
 	      });
-	      return _oci = {
-	        features: ociFeatures,
-	        resources: ociResources,
-	        query: whichPolygon_1({
-	          type: 'FeatureCollection',
-	          features: Object.values(ociFeatures)
-	        })
-	      };
+	    })["catch"](function () {
+	      _loadViewerPromise = null;
 	    });
-	  } // string-to-date parsing in JavaScript is weird
+	    return _loadViewerPromise;
 
+	    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;
 
-	  function parseEventDate(when) {
-	    if (!when) return;
-	    var raw = when.trim();
-	    if (!raw) return;
+	        var yaw = _pannellumViewer.getYaw();
 
-	    if (!/Z$/.test(raw)) {
-	      // if no trailing 'Z', add one
-	      raw += 'Z'; // this forces date to be parsed as a UTC date
-	    }
+	        var ca = selected.ca + yaw;
+	        var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-	    var parsed = new Date(raw);
-	    return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
-	  }
+	        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
 
-	  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$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').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..
+	        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
 
-	    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
-	          });
-	        });
-	      }); // sort communities by feature area ascending, community order descending
+	        var minDist = Infinity;
 
-	      communities.sort(function (a, b) {
-	        return a.area - b.area || b.order - a.order;
-	      });
-	      body.call(showCommunityLinks, communities.map(function (c) {
-	        return c.resource;
-	      }));
-	    });
-	  }
+	        _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));
 
-	  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.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'));
-	  }
+	          if (minTheta > 20) {
+	            dist += 5; // penalize distance if camera angles don't match
+	          }
 
-	  function showCommunityDetails(d) {
-	    var selection = select(this);
-	    var communityID = d.id;
-	    var replacements = {
-	      url: linkify(d.url),
-	      signupUrl: linkify(d.signupUrl || d.url)
-	    };
-	    selection.append('div').attr('class', 'community-name').append('a').attr('target', '_blank').attr('href', d.url).html(_t.html("community.".concat(d.id, ".name")));
-	    var descriptionHTML = _t.html("community.".concat(d.id, ".description"), replacements);
+	          if (dist < minDist) {
+	            nextID = d.data.key;
+	            minDist = dist;
+	          }
+	        });
 
-	    if (d.type === 'reddit') {
-	      // linkify subreddits  #4997
-	      descriptionHTML = descriptionHTML.replace(/(\/r\/\w*\/*)/i, function (match) {
-	        return linkify(d.url, match);
-	      });
+	        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;
+	  },
 
-	    selection.append('div').attr('class', 'community-description').html(descriptionHTML);
+	  /**
+	   * showViewer()
+	   */
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-	    if (d.extendedDescription || 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));
+	    if (isHidden) {
+	      wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
 	    }
 
-	    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
+	    return this;
+	  },
 
-	    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);
-	    }
+	  /**
+	   * 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);
+	  },
 
-	    function showMore(selection) {
-	      var more = selection.selectAll('.community-more').data([0]);
-	      var moreEnter = more.enter().append('div').attr('class', 'community-more');
+	  /**
+	   * 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
 
-	      if (d.extendedDescription) {
-	        moreEnter.append('div').attr('class', 'community-extended-description').html(_t.html("community.".concat(d.id, ".extendedDescription"), replacements));
-	      }
+	    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').call(_t.append('streetside.hires'));
+	    var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date
 
-	      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
-	        }));
-	      }
+	    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').text('©' + yyyy + ' Microsoft');
+	      captureInfo.append('span').text('|');
 	    }
 
-	    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'
-	        };
+	    if (d.captured_at) {
+	      captureInfo.append('span').attr('class', 'captured_at').text(localeTimestamp(d.captured_at));
+	    } // Add image links
 
-	        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;
+	    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').call(_t.append('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').call(_t.append('streetside.report'));
+	    var bubbleIdQuadKey = d.key.toString(4);
+	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
 
-	        if (d.i18n && d.id) {
-	          where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
-	            "default": where
-	          });
-	        }
+	    for (var i = 0; i < paddingNeeded; i++) {
+	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	    }
 
-	        return where;
-	      });
-	      itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
-	        var description = d.description;
+	    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
 
-	        if (d.i18n && d.id) {
-	          description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
-	            "default": description
-	          });
-	        }
+	    var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-	        return description;
+	    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 linkify(url, text) {
-	      text = text || url;
-	      return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
-	    }
-	  }
+	        var sceneID = _currScene.toString();
 
-	  success.changeset = function (val) {
-	    if (!arguments.length) return _changeset;
-	    _changeset = val;
-	    return success;
-	  };
+	        _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-	  success.location = function (val) {
-	    if (!arguments.length) return _location;
-	    _location = val;
-	    return success;
-	  };
 
-	  return utilRebind(success, dispatch$1, 'on');
-	}
+	        if (_currScene > 2) {
+	          sceneID = (_currScene - 1).toString();
 
-	function modeSave(context) {
-	  var mode = {
-	    id: 'save'
-	  };
-	  var keybinding = utilKeybinding('modeSave');
-	  var commit = uiCommit(context).on('cancel', cancel);
+	          _pannellumViewer.removeScene(sceneID);
+	        }
+	      }
+	    });
+	    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);
+	    }
 
-	  var _conflictsUi; // uiConflicts
+	    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
 
+	    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
 
-	  var _location;
+	    context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	  var _success;
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	  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);
+	      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';
+	      }
+	    }
 
-	  function cancel() {
-	    context.enter(modeBrowse(context));
-	  }
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	  function showProgress(num, total) {
-	    var modal = context.container().select('.loading-modal .modal-section');
-	    var progress = modal.selectAll('.progress').data([0]); // enter/update
+	      if (imageKey) {
+	        hash.photo = 'streetside/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	    progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
-	      num: num,
-	      total: total
-	    }));
-	  }
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
 
-	  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);
+	  /**
+	   * cache().
+	   */
+	  cache: function cache() {
+	    return _ssCache;
 	  }
+	};
 
-	  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();
-	  }
+	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 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();
+	function sets(params, n, o) {
+	  if (params.geometry && o[params.geometry]) {
+	    params[n] = o[params.geometry];
 	  }
 
-	  function showSuccess(changeset) {
-	    commit.reset();
-
-	    var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
-	      context.ui().sidebar.hide();
-	    });
+	  return params;
+	}
 
-	    context.enter(modeBrowse(context).sidebar(ui));
-	  }
+	function setFilter(params) {
+	  return sets(params, 'filter', tag_filters);
+	}
 
-	  function keybindingOn() {
-	    select(document).call(keybinding.on('⎋', cancel, true));
-	  }
+	function setSort(params) {
+	  return sets(params, 'sortname', tag_sorts);
+	}
 
-	  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 setSortMembers(params) {
+	  return sets(params, 'sortname', tag_sort_members);
+	}
 
+	function clean(params) {
+	  return utilObjectOmit(params, ['geometry', 'debounce']);
+	}
 
-	  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
-	      });
-	    });
-	  }
+	function filterKeys(type) {
+	  var count_type = type ? 'count_' + type : 'count_all';
+	  return function (d) {
+	    return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+	  };
+	}
 
-	  mode.selectedIDs = function () {
-	    return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+	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;
 	  };
+	}
 
-	  mode.enter = function () {
-	    // Show sidebar
-	    context.ui().sidebar.expand();
+	function filterValues(allowUpperCase) {
+	  return function (d) {
+	    if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-	    function done() {
-	      context.ui().sidebar.show(commit);
-	    }
+	    if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
-	    keybindingOn();
-	    context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
-	    var osm = context.connection();
+	    return parseFloat(d.fraction) > 0.0;
+	  };
+	}
 
-	    if (!osm) {
-	      cancel();
-	      return;
-	    }
+	function filterRoles(geometry) {
+	  return function (d) {
+	    if (d.role === '') return false; // exclude empty role
 
-	    if (osm.authenticated()) {
-	      done();
-	    } else {
-	      osm.authenticate(function (err) {
-	        if (err) {
-	          cancel();
-	        } else {
-	          done();
-	        }
-	      });
-	    }
-	  };
+	    if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
-	  mode.exit = function () {
-	    keybindingOff();
-	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
-	    context.ui().sidebar.hide();
+	    return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
 	  };
-
-	  return mode;
 	}
 
-	function uiToolOldDrawModes(context) {
-	  var tool = {
-	    id: 'old_modes',
-	    label: _t.html('toolbar.add_feature')
+	function valKey(d) {
+	  return {
+	    value: d.key,
+	    title: d.key
 	  };
-	  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 valKeyDescription(d) {
+	  var obj = {
+	    value: d.value,
+	    title: d.description || d.value
+	  };
 
-	  function osmEditable() {
-	    return context.editable();
+	  if (d.count) {
+	    obj.count = d.count;
 	  }
 
-	  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);
-	      }
-	    });
-	  });
+	  return obj;
+	}
 
-	  tool.render = function (selection) {
-	    var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
+	function roleKey(d) {
+	  return {
+	    value: d.role,
+	    title: d.role
+	  };
+	} // sort keys with ':' lower than keys without ':'
 
-	    var debouncedUpdate = debounce(update, 500, {
-	      leading: true,
-	      trailing: true
-	    });
 
-	    context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
-	    context.on('enter.modes', update);
-	    update();
+	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 update() {
-	      var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
-	        return d.id;
-	      }); // exit
+	var debouncedRequest = debounce(request, 300, {
+	  leading: false
+	});
 
-	      buttons.exit().remove(); // enter
+	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);
+	  });
+	}
 
-	      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
+	function checkCache(url, params, exactMatch, callback) {
+	  var rp = params.rp || 25;
+	  var testQuery = params.query || '';
+	  var testUrl = url;
 
-	        var currMode = context.mode().id;
-	        if (/^draw/.test(currMode)) return;
+	  do {
+	    var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-	        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
+	    if (hit && (url === testUrl || hit.length < rp)) {
+	      callback(null, hit);
+	      return true;
+	    } // don't try to shorten the query
 
-	      if (buttons.enter().size() || buttons.exit().size()) {
-	        context.ui().checkOverflow('.top-toolbar', true);
-	      } // update
 
+	    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)
 
-	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-	        return !enabled();
-	      }).classed('active', function (d) {
-	        return context.mode() && context.mode().button === d.button;
-	      });
-	    }
-	  };
+	    testQuery = testQuery.slice(0, -1);
+	    testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+	  } while (testQuery.length >= 0);
 
-	  return tool;
+	  return false;
 	}
 
-	function uiToolNotes(context) {
-	  var tool = {
-	    id: 'notes',
-	    label: _t.html('modes.add_note.label')
-	  };
-	  var mode = modeAddNote(context);
+	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 enabled() {
-	    return notesEnabled() && notesEditable();
-	  }
+	    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
 
-	  function notesEnabled() {
-	    var noteLayer = context.layers().layer('notes');
-	    return noteLayer && noteLayer.enabled();
-	  }
+	        _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;
 
-	  function notesEditable() {
-	    var mode = context.mode();
-	    return context.map().notesEditable() && mode && mode.id !== 'save';
-	  }
+	    if (key && _popularKeys[key]) {
+	      callback(null, []);
+	      return;
+	    }
 
-	  context.keybinding().on(mode.key, function () {
-	    if (!enabled()) return;
+	    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|cai_scale/;
+	        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?';
 
-	    if (mode.id === context.mode().id) {
-	      context.enter(modeBrowse(context));
-	    } else {
-	      context.enter(mode);
+	    if (params.value) {
+	      path = 'tag/wiki_pages?';
+	    } else if (params.rtype) {
+	      path = 'relation/wiki_pages?';
 	    }
-	  });
 
-	  tool.render = function (selection) {
-	    var debouncedUpdate = debounce(update, 500, {
-	      leading: true,
-	      trailing: true
+	    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;
+	  }
+	};
 
-	    context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
-	    context.on('enter.notes', update);
-	    update();
+	/**
+	 * 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 update() {
-	      var showNotes = notesEnabled();
-	      var data = showNotes ? [mode] : [];
-	      var buttons = selection.selectAll('button.add-button').data(data, function (d) {
-	        return d.id;
-	      }); // exit
+	function feature(geom, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	      buttons.exit().remove(); // enter
+	  var feat = {
+	    type: "Feature"
+	  };
 
-	      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
+	  if (options.id === 0 || options.id) {
+	    feat.id = options.id;
+	  }
 
-	        var currMode = context.mode().id;
-	        if (/^draw/.test(currMode)) return;
+	  if (options.bbox) {
+	    feat.bbox = options.bbox;
+	  }
 
-	        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
+	  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
+	 */
 
-	      if (buttons.enter().size() || buttons.exit().size()) {
-	        context.ui().checkOverflow('.top-toolbar', true);
-	      } // update
+	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];
 
-	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-	        return !enabled();
-	      }).classed('active', function (d) {
-	        return context.mode() && context.mode().button === d.button;
-	      });
+	    if (ring.length < 4) {
+	      throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
 	    }
-	  };
-
-	  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);
-	  };
 
-	  return tool;
-	}
+	    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.");
+	      }
+	    }
+	  }
 
-	function uiToolSave(context) {
-	  var tool = {
-	    id: 'save',
-	    label: _t.html('save.title')
+	  var geom = {
+	    type: "Polygon",
+	    coordinates: coordinates
 	  };
-	  var button = null;
-	  var tooltipBehavior = null;
-	  var history = context.history();
-	  var key = uiCmd('⌘S');
-	  var _numChanges = 0;
+	  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 isSaving() {
-	    var mode = context.mode();
-	    return mode && mode.id === 'save';
+	function lineString(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
 	  }
 
-	  function isDisabled() {
-	    return _numChanges === 0 || isSaving();
+	  if (coordinates.length < 2) {
+	    throw new Error("coordinates must be an array of two or more positions");
 	  }
 
-	  function save(d3_event) {
-	    d3_event.preventDefault();
+	  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
+	 */
 
-	    if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-	      context.enter(modeSave(context));
-	    }
+	function multiLineString(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
 	  }
 
-	  function bgColor() {
-	    var step;
+	  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
+	 *
+	 */
 
-	    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
-	    }
+	function multiPolygon(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
 	  }
 
-	  function updateCount() {
-	    var val = history.difference().summary().length;
-	    if (val === _numChanges) return;
-	    _numChanges = val;
+	  var geom = {
+	    type: "MultiPolygon",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
 
-	    if (tooltipBehavior) {
-	      tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
-	    }
+	/**
+	 * 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]}
+	 */
 
-	    if (button) {
-	      button.classed('disabled', isDisabled()).style('background', bgColor());
-	      button.select('span.count').html(_numChanges);
-	    }
+	function getGeom(geojson) {
+	  if (geojson.type === "Feature") {
+	    return geojson.geometry;
 	  }
 
-	  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);
+	  return geojson;
+	}
 
-	      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'))();
-	      }
+	// 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 = [];
 
-	      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());
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode(b, bbox);
 
-	        if (isSaving()) {
-	          button.call(tooltipBehavior.hide);
+	    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);
 	        }
+
+	        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);
 	      }
-	    });
-	  };
+	    }
 
-	  tool.uninstall = function () {
-	    context.keybinding().off(key, true);
-	    context.history().on('change.save', null);
-	    context.on('enter.save', null);
-	    button = null;
-	    tooltipBehavior = null;
-	  };
+	    codeA = lastCode;
+	  }
 
-	  return tool;
-	}
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	function uiToolSidebarToggle(context) {
-	  var tool = {
-	    id: 'sidebar_toggle',
-	    label: _t.html('toolbar.inspect')
-	  };
+	function polygonclip(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-	  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')));
-	  };
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode(prev, bbox) & edge);
 
-	  return tool;
-	}
+	    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
 
-	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')
-	  }];
+	      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	  function editable() {
-	    return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
-	    /* ignore min zoom */
-	    );
+	      prev = p;
+	      prevInside = inside;
+	    }
+
+	    points = result;
+	    if (!points.length) break;
 	  }
 
-	  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();
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
-	      if (editable() && annotation) {
-	        d.action();
-	      }
+	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
 
-	      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)();
-	      }
 
-	      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();
-	    });
+	function bitCode(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
-	    var debouncedUpdate = debounce(update, 500, {
-	      leading: true,
-	      trailing: true
-	    });
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	    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);
+	  return code;
+	}
 
-	    function update() {
-	      buttons.classed('disabled', function (d) {
-	        return !editable() || !d.annotation();
-	      }).each(function () {
-	        var selection = select(this);
+	/**
+	 * 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]
+	 */
 
-	        if (!selection.select('.tooltip.in').empty()) {
-	          selection.call(tooltipBehavior.updateContent);
-	        }
-	      });
-	    }
-	  };
+	function bboxClip(feature, bbox) {
+	  var geom = getGeom(feature);
+	  var type = geom.type;
+	  var properties = feature.type === "Feature" ? feature.properties : {};
+	  var coords = geom.coordinates;
 
-	  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);
-	  };
+	  switch (type) {
+	    case "LineString":
+	    case "MultiLineString":
+	      {
+	        var lines_1 = [];
 
-	  return tool;
-	}
+	        if (type === "LineString") {
+	          coords = [coords];
+	        }
 
-	function uiTopToolbar(context) {
-	  var sidebarToggle = uiToolSidebarToggle(context),
-	      modes = uiToolOldDrawModes(context),
-	      notes = uiToolNotes(context),
-	      undoRedo = uiToolUndoRedo(context),
-	      save = uiToolSave(context);
+	        coords.forEach(function (line) {
+	          lineclip(line, bbox, lines_1);
+	        });
 
-	  function notesEnabled() {
-	    var noteLayer = context.layers().layer('notes');
-	    return noteLayer && noteLayer.enabled();
-	  }
+	        if (lines_1.length === 1) {
+	          return lineString(lines_1[0], properties);
+	        }
 
-	  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;
+	        return multiLineString(lines_1, properties);
 	      }
-	    });
 
-	    var debouncedUpdate = debounce(update, 500, {
-	      leading: true,
-	      trailing: true
-	    });
+	    case "Polygon":
+	      return polygon(clipPolygon(coords, bbox), properties);
 
-	    context.layers().on('change.topToolbar', debouncedUpdate);
-	    update();
+	    case "MultiPolygon":
+	      return multiPolygon(coords.map(function (poly) {
+	        return clipPolygon(poly, bbox);
+	      }), properties);
 
-	    function update() {
-	      var tools = [sidebarToggle, 'spacer', modes];
-	      tools.push('spacer');
+	    default:
+	      throw new Error("geometry " + type + " not supported");
+	  }
+	}
 
-	      if (notesEnabled()) {
-	        tools = tools.concat([notes, 'spacer']);
+	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 = polygonclip(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]);
 	      }
 
-	      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;
-	      });
+	      if (clipped.length >= 4) {
+	        outRings.push(clipped);
+	      }
 	    }
 	  }
 
-	  return topToolbar;
+	  return outRings;
 	}
 
-	var sawVersion = null;
-	var isNewVersion = false;
-	var isNewUser = false;
-	function uiVersion(context) {
-	  var currVersion = context.version;
-	  var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
-
-	  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;
-	  }
+	var tiler = utilTiler().tileSize(512).margin(1);
+	var dispatch = dispatch$8('loadedData');
 
-	  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
+	var _vtCache;
 
-	    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.html('version.whats_new', {
-	        version: currVersion
-	      })).placement('top'));
-	    }
-	  };
+	function abortRequest(controller) {
+	  controller.abort();
 	}
 
-	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: '-'
-	  }];
+	function vtToGeoJSON(data, tile, mergeCache) {
+	  var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+	  var layers = Object.keys(vectorTile$1.layers);
 
-	  function zoomIn(d3_event) {
-	    if (d3_event.shiftKey) return;
-	    d3_event.preventDefault();
-	    context.map().zoomIn();
+	  if (!Array.isArray(layers)) {
+	    layers = [layers];
 	  }
 
-	  function zoomOut(d3_event) {
-	    if (d3_event.shiftKey) return;
-	    d3_event.preventDefault();
-	    context.map().zoomOut();
-	  }
+	  var features = [];
+	  layers.forEach(function (layerID) {
+	    var layer = vectorTile$1.layers[layerID];
 
-	  function zoomInFurther(d3_event) {
-	    if (d3_event.shiftKey) return;
-	    d3_event.preventDefault();
-	    context.map().zoomInFurther();
-	  }
+	    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
 
-	  function zoomOutFurther(d3_event) {
-	    if (d3_event.shiftKey) return;
-	    d3_event.preventDefault();
-	    context.map().zoomOutFurther();
-	  }
+	        if (geometry.type === 'Polygon') {
+	          geometry.type = 'MultiPolygon';
+	          geometry.coordinates = [geometry.coordinates];
+	        }
 
-	  return function (selection) {
-	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
-	      if (d.disabled()) {
-	        return d.disabledTitle;
-	      }
+	        var isClipped = false; // Clip to tile bounds
 
-	      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)();
-	      }
+	        if (geometry.type === 'MultiPolygon') {
+	          var featureClip = bboxClip(feature, tile.extent.rectangle());
 
-	      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);
-	    });
+	          if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+	            // feature = featureClip;
+	            isClipped = true;
+	          }
 
-	    function updateButtonStates() {
-	      buttons.classed('disabled', function (d) {
-	        return d.disabled();
-	      }).each(function () {
-	        var selection = select(this);
+	          if (!feature.geometry.coordinates.length) continue; // not actually on this tile
+
+	          if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+	        } // Generate some unique IDs and add some metadata
 
-	        if (!selection.select('.tooltip.in').empty()) {
-	          selection.call(tooltipBehavior.updateContent);
-	        }
-	      });
-	    }
 
-	    updateButtonStates();
-	    context.map().on('move.uiZoom', updateButtonStates);
-	  };
-	}
+	        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 uiZoomToSelection(context) {
-	  function isDisabled() {
-	    var mode = context.mode();
-	    return !mode || !mode.zoomToSelected;
-	  }
+	        if (isClipped && geometry.type === 'MultiPolygon') {
+	          var merged = mergeCache[propertyhash];
 
-	  var _lastPointerUpType;
+	          if (merged && merged.length) {
+	            var other = merged[0];
+	            var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);
 
-	  function pointerup(d3_event) {
-	    _lastPointerUpType = d3_event.pointerType;
-	  }
+	            if (!coords || !coords.length) {
+	              continue; // something failed in polygon union
+	            }
 
-	  function click(d3_event) {
-	    d3_event.preventDefault();
+	            merged.push(feature);
 
-	    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();
+	            for (var j = 0; j < merged.length; j++) {
+	              // all these features get...
+	              merged[j].geometry.coordinates = coords; // same coords
 
-	      if (mode && mode.zoomToSelected) {
-	        mode.zoomToSelected();
+	              merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
+	            }
+	          } else {
+	            mergeCache[propertyhash] = [feature];
+	          }
+	        }
 	      }
 	    }
+	  });
+	  return features;
+	}
 
-	    _lastPointerUpType = null;
-	  }
-
-	  return function (selection) {
-	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
-	      if (isDisabled()) {
-	        return _t.html('inspector.zoom_to.no_selection');
-	      }
+	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);
+	    }
 
-	      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);
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
 
-	    function setEnabledState() {
-	      button.classed('disabled', isDisabled());
+	    var z = tile.xyz[2];
 
-	      if (!button.select('.tooltip.in').empty()) {
-	        button.call(tooltipBehavior.updateContent);
-	      }
+	    if (!source.canMerge[z]) {
+	      source.canMerge[z] = {}; // initialize mergeCache
 	    }
 
-	    context.on('enter.uiZoomToSelection', setEnabledState);
-	    setEnabledState();
-	  };
+	    source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+	    dispatch.call('loadedData');
+	  })["catch"](function () {
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	  });
 	}
 
-	function uiPane(id, context) {
-	  var _key;
-
-	  var _label = '';
-	  var _description = '';
-	  var _iconName = '';
-
-	  var _sections; // array of uiSection objects
+	var serviceVectorTile = {
+	  init: function init() {
+	    if (!_vtCache) {
+	      this.reset();
+	    }
 
+	    this.event = utilRebind(this, dispatch, 'on');
+	  },
+	  reset: function reset() {
+	    for (var sourceID in _vtCache) {
+	      var source = _vtCache[sourceID];
 
-	  var _paneSelection = select(null);
+	      if (source && source.inflight) {
+	        Object.values(source.inflight).forEach(abortRequest);
+	      }
+	    }
 
-	  var _paneTooltip;
+	    _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 = [];
 
-	  var pane = {
-	    id: id
-	  };
+	    for (var i = 0; i < tiles.length; i++) {
+	      var features = source.loaded[tiles[i].id];
+	      if (!features || !features.length) continue;
 
-	  pane.label = function (val) {
-	    if (!arguments.length) return _label;
-	    _label = val;
-	    return pane;
-	  };
+	      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
 
-	  pane.key = function (val) {
-	    if (!arguments.length) return _key;
-	    _key = val;
-	    return pane;
-	  };
+	        results.push(Object.assign({}, feature)); // shallow copy
+	      }
+	    }
 
-	  pane.description = function (val) {
-	    if (!arguments.length) return _description;
-	    _description = val;
-	    return pane;
-	  };
+	    return results;
+	  },
+	  loadTiles: function loadTiles(sourceID, template, projection) {
+	    var source = _vtCache[sourceID];
 
-	  pane.iconName = function (val) {
-	    if (!arguments.length) return _iconName;
-	    _iconName = val;
-	    return pane;
-	  };
+	    if (!source) {
+	      source = this.addSource(sourceID, template);
+	    }
 
-	  pane.sections = function (val) {
-	    if (!arguments.length) return _sections;
-	    _sections = val;
-	    return pane;
-	  };
+	    var tiles = tiler.getTiles(projection); // abort inflight requests that are no longer needed
 
-	  pane.selection = function () {
-	    return _paneSelection;
-	  };
+	    Object.keys(source.inflight).forEach(function (k) {
+	      var wanted = tiles.find(function (tile) {
+	        return k === tile.id;
+	      });
 
-	  function hidePane() {
-	    context.ui().togglePanes();
+	      if (!wanted) {
+	        abortRequest(source.inflight[k]);
+	        delete source.inflight[k];
+	      }
+	    });
+	    tiles.forEach(function (tile) {
+	      loadTile(source, tile);
+	    });
+	  },
+	  cache: function cache() {
+	    return _vtCache;
 	  }
+	};
 
-	  pane.togglePane = function (d3_event) {
-	    if (d3_event) d3_event.preventDefault();
-
-	    _paneTooltip.hide();
+	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;
+	    }
 
-	    context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
-	  };
+	    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);
+	      }
 
-	  pane.renderToggleButton = function (selection) {
-	    if (!_paneTooltip) {
-	      _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
+	      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;
 	    }
 
-	    selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
-	  };
+	    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);
+	      }
 
-	  pane.renderContent = function (selection) {
-	    // override to fully customize content
-	    if (_sections) {
-	      _sections.forEach(function (section) {
-	        selection.call(section.render);
-	      });
+	      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;
 	    }
-	  };
 
-	  pane.renderPane = function (selection) {
-	    _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
+	    if (_wikidataCache[qid]) {
+	      if (callback) callback(null, _wikidataCache[qid]);
+	      return;
+	    }
 
-	    var heading = _paneSelection.append('div').attr('class', 'pane-heading');
+	    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);
+	      }
 
-	    heading.append('h2').html(_label);
-	    heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));
+	      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;
+	      }
 
-	    _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
+	      var i;
+	      var description;
 
-	    if (_key) {
-	      context.keybinding().on(_key, pane.togglePane);
-	    }
-	  };
+	      for (i in langs) {
+	        var code = langs[i];
 
-	  return pane;
-	}
+	        if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+	          description = entity.descriptions[code];
+	          break;
+	        }
+	      }
 
-	function uiSectionBackgroundDisplayOptions(context) {
-	  var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	  var _detected = utilDetect();
+	      var result = {
+	        title: entity.id,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://www.wikidata.org/wiki/' + entity.id
+	      }; // add image
 
-	  var _storedOpacity = corePreferences('background-opacity');
+	      if (entity.claims) {
+	        var imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        var props = ['P154', 'P18']; // logo image, image
 
-	  var _minVal = 0;
+	        var prop, image;
 
-	  var _maxVal = _detected.cssfilters ? 3 : 1;
+	        for (i = 0; i < props.length; i++) {
+	          prop = entity.claims[props[i]];
 
-	  var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
+	          if (prop && Object.keys(prop).length > 0) {
+	            image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-	  var _options = {
-	    brightness: _storedOpacity !== null ? +_storedOpacity : 1,
-	    contrast: 1,
-	    saturation: 1,
-	    sharpness: 1
-	  };
+	            if (image) {
+	              result.imageURL = imageroot + '?' + utilQsString({
+	                title: 'Special:Redirect/file/' + image,
+	                width: 400
+	              });
+	              break;
+	            }
+	          }
+	        }
+	      }
 
-	  function clamp(x, min, max) {
-	    return Math.max(min, Math.min(x, max));
-	  }
+	      if (entity.sitelinks) {
+	        var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-	  function updateValue(d, val) {
-	    val = clamp(val, _minVal, _maxVal);
-	    _options[d] = val;
-	    context.background()[d](val);
+	        for (i = 0; i < langs.length; i++) {
+	          // check each, in order of preference
+	          var w = langs[i] + 'wiki';
 
-	    if (d === 'brightness') {
-	      corePreferences('background-opacity', val);
-	    }
+	          if (entity.sitelinks[w]) {
+	            var title = entity.sitelinks[w].title;
+	            var tKey = 'inspector.wiki_reference';
 
-	    section.reRender();
+	            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;
+	          }
+	        }
+	      }
+
+	      callback(null, result);
+	    });
 	  }
+	};
 
-	  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 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;
+	    }
 
-	    var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
-	      return 'display-control display-control-' + d;
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      list: 'search',
+	      srlimit: '10',
+	      srinfo: 'suggestion',
+	      format: 'json',
+	      origin: '*',
+	      srsearch: query
 	    });
-	    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;
+	    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, []);
 	    });
-	    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');
+	  },
+	  suggestions: function suggestions(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('', []);
+	      return;
+	    }
+
+	    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');
+	      }
+
+	      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;
+	    }
 
-	      if (!val && d3_event && d3_event.target) {
-	        val = d3_event.target.value;
+	    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');
 	      }
 
-	      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
+	      if (callback) {
+	        var list = result.query.pages[Object.keys(result.query.pages)[0]];
+	        var translations = {};
 
-	    containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
-	      d3_event.preventDefault();
+	        if (list && list.langlinks) {
+	          list.langlinks.forEach(function (d) {
+	            translations[d.lang] = d['*'];
+	          });
+	        }
 
-	      for (var i = 0; i < _sliders.length; i++) {
-	        updateValue(_sliders[i], 1);
+	        callback(null, translations);
 	      }
-	    }); // update
-
-	    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) + '%';
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message);
 	    });
-	    container.selectAll('.display-option-reset').classed('disabled', function (d) {
-	      return _options[d] === 1;
-	    }); // first time only, set brightness if needed
-
-	    if (containerEnter.size() && _options.brightness !== 1) {
-	      context.background().brightness(_options.brightness);
-	    }
 	  }
+	};
 
-	  return section;
-	}
-
-	function uiSettingsCustomBackground() {
-	  var dispatch$1 = dispatch('change');
+	var services = {
+	  geocoder: serviceNominatim,
+	  keepRight: serviceKeepRight,
+	  improveOSM: serviceImproveOSM,
+	  osmose: serviceOsmose,
+	  mapillary: serviceMapillary,
+	  nsi: serviceNsi,
+	  kartaview: serviceKartaview,
+	  osm: serviceOsm,
+	  osmWikibase: serviceOsmWikibase,
+	  maprules: serviceMapRules,
+	  streetside: serviceStreetside,
+	  taginfo: serviceTaginfo,
+	  vectorTile: serviceVectorTile,
+	  wikidata: serviceWikidata,
+	  wikipedia: serviceWikipedia
+	};
 
-	  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
+	function modeDragNote(context) {
+	  var mode = {
+	    id: 'drag-note',
+	    button: 'browse'
+	  };
+	  var edit = behaviorEdit(context);
 
-	    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);
+	  var _nudgeInterval;
 
-	    function isSaveDisabled() {
-	      return null;
-	    } // restore the original template
+	  var _lastLoc;
 
+	  var _note; // most current note.. dragged note may have stale datum.
 
-	    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 startNudge(d3_event, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, nudge);
+	    }, 50);
+	  }
 
-	    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);
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
 	    }
 	  }
 
-	  return utilRebind(render, dispatch$1, 'on');
-	}
-
-	function uiSectionBackgroundList(context) {
-	  var _backgroundList = select(null);
-
-	  var _customSource = context.background().findSource('custom');
-
-	  var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
-
-	  var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
-
-	  function previousBackgroundID() {
-	    return corePreferences('background-last-used-toggle');
+	  function origin(note) {
+	    return context.projection(note.loc);
 	  }
 
-	  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
-
-	    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
+	  function start(d3_event, note) {
+	    _note = note;
+	    var osm = services.osm;
 
-	    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'));
+	    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);
+	    }
 
-	    _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
-	      chooseBackground(d);
-	    }, function (d) {
-	      return !d.isHidden() && !d.overlay;
-	    });
+	    context.surface().selectAll('.note-' + _note.id).classed('active', true);
+	    context.perform(actionNoop());
+	    context.enter(mode);
+	    context.selectedNoteID(_note.id);
 	  }
 
-	  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);
+	  function move(d3_event, entity, point) {
+	    d3_event.stopPropagation();
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	      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()));
-	      }
-	    });
+	    if (nudge) {
+	      startNudge(d3_event, nudge);
+	    } else {
+	      stopNudge();
+	    }
 	  }
 
-	  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', 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);
-	  }
+	  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;
 
-	  function updateLayerSelections(selection) {
-	    function active(d) {
-	      return context.background().showsLayer(d);
+	    if (osm) {
+	      osm.replaceNote(_note); // update note cache
 	    }
 
-	    selection.selectAll('li').classed('active', active).classed('switch', function (d) {
-	      return d.id === previousBackgroundID();
-	    }).call(setTooltips).selectAll('input').property('checked', active);
+	    context.replace(actionNoop()); // trigger redraw
 	  }
 
-	  function chooseBackground(d) {
-	    if (d.id === 'custom' && !d.template()) {
-	      return editCustom();
-	    }
+	  function end() {
+	    context.replace(actionNoop()); // trigger redraw
 
-	    var previousBackground = context.background().baseLayerSource();
-	    corePreferences('background-last-used-toggle', previousBackground.id);
-	    corePreferences('background-last-used', d.id);
-	    context.background().baseLayerSource(d);
+	    context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
 	  }
 
-	  function customChanged(d) {
-	    if (d && d.template) {
-	      _customSource.template(d.template);
-
-	      chooseBackground(_customSource);
-	    } else {
-	      _customSource.template('');
+	  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);
 
-	      chooseBackground(context.background().findSource('none'));
-	    }
-	  }
+	  mode.enter = function () {
+	    context.install(edit);
+	  };
 
-	  function editCustom(d3_event) {
-	    d3_event.preventDefault();
-	    context.container().call(_settingsCustomBackground);
-	  }
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(edit);
+	    context.surface().selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
-	  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;
+	  mode.behavior = drag;
+	  return mode;
 	}
 
-	function uiSectionBackgroundOffset(context) {
-	  var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+	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
 
-	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	  function selectData(d3_event, drawn) {
+	    var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-	  var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
+	    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 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 (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
+	    }
 	  }
 
-	  function resetOffset() {
-	    context.background().offset([0, 0]);
-	    updateValue();
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
 	  }
 
-	  function nudge(d) {
-	    context.background().nudge(d, context.map().zoom());
-	    updateValue();
-	  }
+	  mode.zoomToSelected = function () {
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+	  };
 
-	  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;
-	    });
+	  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
 
-	    if (d.length !== 2 || !d[0] || !d[1]) {
-	      input.classed('error', true);
-	      return;
-	    }
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    sidebar.expand(sidebar.intersects(extent));
+	    context.map().on('drawn.select-data', selectData);
+	  };
 
-	    context.background().offset(geoMetersToOffset(d));
-	    updateValue();
-	  }
+	  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 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);
+	  return mode;
+	}
 
-	    if (_pointerPrefix === 'pointer') {
-	      select(window).on('pointercancel.drag-bg-offset', pointerup);
-	    }
+	function behaviorSelect(context) {
+	  var _tolerancePx = 4; // see also behaviorDrag
 
-	    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);
-	    }
+	  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
 
-	    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);
+	  var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
+
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+	  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;
 	    }
-	  }
 
-	  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) {
+	    if (d3_event.keyCode === 93 || // context menu key
+	    d3_event.keyCode === 32) {
+	      // spacebar
 	      d3_event.preventDefault();
-	      resetOffset();
-	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
-	    updateValue();
-	  }
-
-	  context.background().on('change.backgroundOffset-update', updateValue);
-	  return section;
-	}
+	    }
 
-	function uiSectionOverlayList(context) {
-	  var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
+	    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
 
-	  var _overlayList = select(null);
+	    cancelLongPress();
 
-	  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 (d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', true);
+	    }
 
-	      if (description || isOverflowing) {
-	        item.call(uiTooltip().placement(placement).title(description || d.name()));
+	    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 updateLayerSelections(selection) {
-	    function active(d) {
-	      return context.background().showsLayer(d);
 	    }
-
-	    selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
 	  }
 
-	  function chooseOverlay(d3_event, d) {
-	    d3_event.preventDefault();
-	    context.background().toggleOverlayLayer(d);
-
-	    _overlayList.call(updateLayerSelections);
+	  function keyup(d3_event) {
+	    cancelLongPress();
 
-	    document.activeElement.blur();
-	  }
+	    if (!d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', false);
+	    }
 
-	  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);
+	    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;
 
-	    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 (pointer) {
+	        delete _downPointers.spacebar;
+	        if (pointer.done) return;
+	        d3_event.preventDefault();
+	        _lastInteractionType = 'spacebar';
+	        click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+	      }
 	    }
 	  }
 
-	  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);
-
-	    _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
-	      return !d.isHidden() && d.overlay;
-	    });
+	  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
+	    };
 	  }
 
-	  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 didLongPress(id, interactionType) {
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
 
-	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;
-	}
+	    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
 
-	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?
+	    _longPressTimeout = null;
+	    _lastInteractionType = interactionType;
+	    _showMenu = true;
+	    click(pointer.firstEvent, pointer.lastEvent, id);
+	  }
 
-	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+	  function pointermove(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
 
-	      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');
+	    if (_downPointers[id]) {
+	      _downPointers[id].lastEvent = d3_event;
+	    }
 
-	  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('');
+	    if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+	      _lastMouseEvent = d3_event;
 
-	      if (rtl) {
-	        nav.call(drawNext).call(drawPrevious);
-	      } else {
-	        nav.call(drawPrevious).call(drawNext);
+	      if (_downPointers.spacebar) {
+	        _downPointers.spacebar.lastEvent = d3_event;
 	      }
+	    }
+	  }
 
-	      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 pointerup(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
+	    delete _downPointers[id];
 
-	      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 (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
 	    }
 
-	    function clickWalkthrough(d3_event) {
-	      d3_event.preventDefault();
-	      if (context.inIntro()) return;
-	      context.container().call(uiIntro(context));
-	      context.ui().togglePanes();
+	    if (pointer.done) return;
+	    click(pointer.firstEvent, d3_event, id);
+	  }
+
+	  function pointercancel(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    if (!_downPointers[id]) return;
+	    delete _downPointers[id];
+
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
 	    }
+	  }
 
-	    function clickShortcuts(d3_event) {
-	      d3_event.preventDefault();
-	      context.container().call(context.ui().shortcuts, true);
+	  function contextmenu(d3_event) {
+	    d3_event.preventDefault();
+
+	    if (!+d3_event.clientX && !+d3_event.clientY) {
+	      if (_lastMouseEvent) {
+	        d3_event.sourceEvent = _lastMouseEvent;
+	      } else {
+	        return;
+	      }
+	    } else {
+	      _lastMouseEvent = d3_event;
+	      _lastInteractionType = 'rightclick';
 	    }
 
-	    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);
-	  };
+	    _showMenu = true;
+	    click(d3_event, d3_event);
+	  }
 
-	  return helpPane;
-	}
+	  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.
 
-	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;
-	  });
+	    var pointGetter = utilFastMouse(mapNode);
+	    var p1 = pointGetter(firstEvent);
+	    var p2 = pointGetter(lastEvent);
+	    var dist = geoVecLength(p1, p2);
 
-	  function getOptions() {
-	    return {
-	      what: corePreferences('validate-what') || 'edited',
-	      where: corePreferences('validate-where') || 'all'
-	    };
-	  } // get and cache the issues to display, unordered
+	    if (dist > _tolerancePx || !mapContains(lastEvent)) {
+	      resetProperties();
+	      return;
+	    }
 
+	    var targetDatum = lastEvent.target.__data__;
+	    var multiselectEntityId;
 
-	  function reloadIssues() {
-	    _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
-	  }
+	    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);
 
-	  function renderDisclosureContent(selection) {
-	    var center = context.map().center();
-	    var graph = context.graph(); // sort issues by distance away from the center of the map
+	      if (selectPointerInfo) {
+	        _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
 
-	    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
+	        multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+	        _downPointers[selectPointerInfo.pointerId].done = true;
+	      }
+	    } // support multiselect if data is already selected
 
 
-	    issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
+	    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);
 
-	    selection.call(drawIssuesList, issues);
-	  }
+	    processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-	  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.id;
-	    }); // Exit
+	    function mapContains(event) {
+	      var rect = mapNode.getBoundingClientRect();
+	      return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
+	    }
 
-	    items.exit().remove(); // Enter
+	    function pointerDownOnSelection(skipPointerId) {
+	      var mode = context.mode();
+	      var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-	    var itemsEnter = items.enter().append('li').attr('class', function (d) {
-	      return 'issue severity-' + d.severity;
-	    }).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 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));
-	    });
-	    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
+	      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;
 
-	    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);
+	        if (context.graph().hasEntity(entity.id)) {
+	          return {
+	            pointerId: pointerId,
+	            entityId: entity.id,
+	            selected: selectedIDs.indexOf(entity.id) !== -1
+	          };
+	        }
+	      }
+
+	      return null;
 	    }
-	     // 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();
-	        });
-	    */
 	  }
 
-	  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
-
+	  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;
 
-	      section.reRender();
-	    });
-	  }, 1000));
-	  return section;
-	}
+	    if (datum && datum.type === 'midpoint') {
+	      // treat targeting midpoints as if targeting the parent way
+	      datum = datum.parents[0];
+	    }
 
-	function uiSectionValidationOptions(context) {
-	  var section = uiSection('issues-options', context).content(renderContent);
+	    var newMode;
 
-	  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);
-	    });
-	  }
+	    if (datum instanceof osmEntity) {
+	      // targeting an entity
+	      var selectedIDs = context.selectedIDs();
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	  function getOptions() {
-	    return {
-	      what: corePreferences('validate-what') || 'edited',
-	      // 'all', 'edited'
-	      where: corePreferences('validate-where') || 'all' // 'all', 'visible'
+	      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);
+	        }
+	      } 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);
 
-	  function updateOptionValue(d3_event, d, val) {
-	    if (!val && d3_event && d3_event.target) {
-	      val = d3_event.target.value;
+	      if (!isMultiselect && mode.id !== 'browse') {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 
-	    corePreferences('validate-' + d, val);
-	    context.validator().validate();
-	  }
+	    context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
-	  return section;
-	}
+	    if (showMenu) context.ui().showEditMenu(point, interactionType);
+	    resetProperties();
+	  }
 
-	function uiSectionValidationRules(context) {
-	  var MINSQUARE = 0;
-	  var MAXSQUARE = 20;
-	  var DEFAULTSQUARE = 5; // see also unsquare_way.js
+	  function cancelLongPress() {
+	    if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+	    _longPressTimeout = null;
+	  }
 
-	  var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
+	  function resetProperties() {
+	    cancelLongPress();
+	    _showMenu = false;
+	    _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+	  }
 
-	  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 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;
 
-	  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);
+	      if (+e.clientX === 0 && +e.clientY === 0) {
+	        d3_event.preventDefault();
+	      }
 	    });
-	    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
-
-	    container = container.merge(containerEnter);
-	    container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+	    selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+	    /*if (d3_event && d3_event.shiftKey) {
+	        context.surface()
+	            .classed('behavior-multiselect', true);
+	    }*/
 	  }
 
-	  function drawListItems(selection, data, type, name, change, active) {
-	    var items = selection.selectAll('li').data(data); // Exit
+	  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);
+	  };
 
-	    items.exit().remove(); // Enter
+	  return behavior;
+	}
 
-	    var enter = items.enter().append('li');
+	function operationContinue(context, selectedIDs) {
+	  var _entities = selectedIDs.map(function (id) {
+	    return context.graph().entity(id);
+	  });
 
-	    if (name === 'rule') {
-	      enter.call(uiTooltip().title(function (d) {
-	        return _t.html('issues.' + d + '.tip');
-	      }).placement('top'));
-	    }
+	  var _geometries = Object.assign({
+	    line: [],
+	    vertex: []
+	  }, utilArrayGroupBy(_entities, function (entity) {
+	    return entity.geometry(context.graph());
+	  }));
 
-	    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 _vertex = _geometries.vertex.length && _geometries.vertex[0];
 
-	      if (d === 'unsquare_way') {
-	        params.val = '<span class="square-degrees"></span>';
-	      }
+	  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);
+	    }) : [];
+	  }
 
-	      return _t.html('issues.' + d + '.title', params);
-	    }); // Update
+	  var _candidates = candidateWays();
 
-	    items = items.merge(enter);
-	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
+	  var operation = function operation() {
+	    var candidate = _candidates[0];
+	    context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+	  };
 
-	    var degStr = corePreferences('validate-square-degrees');
+	  operation.relatedEntityIds = function () {
+	    return _candidates.length ? [_candidates[0].id] : [];
+	  };
 
-	    if (degStr === null) {
-	      degStr = DEFAULTSQUARE.toString();
+	  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 span = items.selectAll('.square-degrees');
-	    var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
+	    return false;
+	  };
 
-	    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);
-	  }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+	  };
 
-	  function changeSquare() {
-	    var input = select(this);
-	    var degStr = utilGetSetValue(input).trim();
-	    var degNum = parseFloat(degStr, 10);
+	  operation.annotation = function () {
+	    return _t('operations.continue.annotation.line');
+	  };
 
-	    if (!isFinite(degNum)) {
-	      degNum = DEFAULTSQUARE;
-	    } else if (degNum > MAXSQUARE) {
-	      degNum = MAXSQUARE;
-	    } else if (degNum < MINSQUARE) {
-	      degNum = MINSQUARE;
-	    }
+	  operation.id = 'continue';
+	  operation.keys = [_t('operations.continue.key')];
+	  operation.title = _t('operations.continue.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
+	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
 
-	    degStr = degNum.toString();
-	    input.property('value', degStr);
-	    corePreferences('validate-square-degrees', degStr);
-	    context.validator().reloadUnsquareIssues();
+	      return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+	    });
 	  }
 
-	  function isRuleEnabled(d) {
-	    return context.validator().isRuleEnabled(d);
-	  }
+	  var operation = function operation() {
+	    var graph = context.graph();
+	    var selected = groupEntities(getFilteredIdsToCopy(), graph);
+	    var canCopy = [];
+	    var skip = {};
+	    var entity;
+	    var i;
 
-	  function toggleRule(d3_event, d) {
-	    context.validator().toggleRule(d);
-	  }
+	    for (i = 0; i < selected.relation.length; i++) {
+	      entity = selected.relation[i];
 
-	  context.validator().on('validated.uiSectionValidationRules', function () {
-	    window.requestIdleCallback(section.reRender);
-	  });
-	  return section;
-	}
+	      if (!skip[entity.id] && entity.isComplete(graph)) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
+	    }
 
-	function uiSectionValidationStatus(context) {
-	  var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
-	    var issues = context.validator().getIssues(getOptions());
-	    return issues.length === 0;
-	  });
+	    for (i = 0; i < selected.way.length; i++) {
+	      entity = selected.way[i];
 
-	  function getOptions() {
-	    return {
-	      what: corePreferences('validate-what') || 'edited',
-	      where: corePreferences('validate-where') || 'all'
-	    };
-	  }
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
+	    }
 
-	  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);
-	  }
+	    for (i = 0; i < selected.node.length; i++) {
+	      entity = selected.node[i];
 
-	  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
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	      }
+	    }
 
-	    resetIgnored.exit().remove(); // enter
+	    context.copyIDs(canCopy);
 
-	    var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
-	    resetIgnoredEnter.append('a').attr('href', '#'); // update
+	    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);
+	    }
+	  };
 
-	    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();
+	  function groupEntities(ids, graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
 	    });
+	    return Object.assign({
+	      relation: [],
+	      way: [],
+	      node: []
+	    }, utilArrayGroupBy(entities, 'type'));
 	  }
 
-	  function setNoIssuesText(selection) {
-	    var opts = getOptions();
+	  function getDescendants(id, graph, descendants) {
+	    var entity = graph.entity(id);
+	    var children;
+	    descendants = descendants || {};
 
-	    function checkForHiddenIssues(cases) {
-	      for (var type in cases) {
-	        var hiddenOpts = cases[type];
-	        var hiddenIssues = context.validator().getIssues(hiddenOpts);
+	    if (entity.type === 'relation') {
+	      children = entity.members.map(function (m) {
+	        return m.id;
+	      });
+	    } else if (entity.type === 'way') {
+	      children = entity.nodes;
+	    } else {
+	      children = [];
+	    }
 
-	        if (hiddenIssues.length) {
-	          selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
-	            count: hiddenIssues.length.toString()
-	          }));
-	          return;
-	        }
+	    for (var i = 0; i < children.length; i++) {
+	      if (!descendants[children[i]]) {
+	        descendants[children[i]] = true;
+	        descendants = getDescendants(children[i], graph, descendants);
 	      }
-
-	      selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
 	    }
 
-	    var messageType;
+	    return descendants;
+	  }
 
-	    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'
-	        }
-	      });
-	    } 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'
-	        }
-	      });
-	    } 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') {
-	      messageType = 'everything';
-	      checkForHiddenIssues({
-	        disabled_rules: {
-	          what: 'all',
-	          where: 'all',
-	          includeDisabledRules: 'only'
-	        },
-	        ignored_issues: {
-	          what: 'all',
-	          where: 'all',
-	          includeIgnored: 'only'
-	        }
-	      });
-	    }
+	  operation.available = function () {
+	    return getFilteredIdsToCopy().length > 0;
+	  };
 
-	    if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-	      messageType = 'no_edits';
+	  operation.disabled = function () {
+	    var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
+
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
 	    }
 
-	    selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));
-	  }
+	    return false;
+	  };
 
-	  context.validator().on('validated.uiSectionValidationStatus', function () {
-	    window.requestIdleCallback(section.reRender);
-	  });
-	  context.map().on('move.uiSectionValidationStatus', debounce(function () {
-	    window.requestIdleCallback(section.reRender);
-	  }, 1000));
-	  return section;
-	}
+	  operation.availableForKeypress = function () {
+	    var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
 
-	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 !selection || !selection.toString();
+	  };
 
-	function uiSettingsCustomData(context) {
-	  var dispatch$1 = dispatch('change');
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.copy.' + disable, {
+	      n: selectedIDs.length
+	    }) : _t('operations.copy.description', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	  function render(selection) {
-	    var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+	  operation.annotation = function () {
+	    return _t('operations.copy.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    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 _point;
 
-	    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;
+	  operation.point = function (val) {
+	    _point = val;
+	    return operation;
+	  };
 
-	      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
+	  operation.id = 'copy';
+	  operation.keys = [uiCmd('⌘C')];
+	  operation.title = _t('operations.copy.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    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 operationDisconnect(context, selectedIDs) {
+	  var _vertexIDs = [];
+	  var _wayIDs = [];
+	  var _otherIDs = [];
+	  var _actions = [];
+	  selectedIDs.forEach(function (id) {
+	    var entity = context.entity(id);
 
-	    function isSaveDisabled() {
-	      return null;
-	    } // restore the original url
+	    if (entity.type === 'way') {
+	      _wayIDs.push(id);
+	    } else if (entity.geometry(context.graph()) === 'vertex') {
+	      _vertexIDs.push(id);
+	    } else {
+	      _otherIDs.push(id);
+	    }
+	  });
 
+	  var _coords,
+	      _descriptionID = '',
+	      _annotationID = 'features';
 
-	    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
+	  var _disconnectingVertexIds = [];
+	  var _disconnectingWayIds = [];
 
+	  if (_vertexIDs.length > 0) {
+	    // At the selected vertices, disconnect the selected ways, if any, else
+	    // disconnect all connected ways
+	    _disconnectingVertexIds = _vertexIDs;
 
-	    function clickSave() {
-	      _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
+	    _vertexIDs.forEach(function (vertexID) {
+	      var action = actionDisconnect(vertexID);
 
-	      if (_currSettings.url) {
-	        _currSettings.fileList = null;
-	      }
+	      if (_wayIDs.length > 0) {
+	        var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+	          var way = context.entity(wayID);
+	          return way.nodes.indexOf(vertexID) !== -1;
+	        });
 
-	      if (_currSettings.fileList) {
-	        _currSettings.url = '';
+	        action.limitWays(waysIDsForVertex);
 	      }
 
-	      corePreferences('settings-custom-data-url', _currSettings.url);
-	      this.blur();
-	      modal.close();
-	      dispatch$1.call('change', this, _currSettings);
-	    }
-	  }
+	      _actions.push(action);
 
-	  return utilRebind(render, dispatch$1, 'on');
-	}
+	      _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+	        return d.id;
+	      }));
+	    });
 
-	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);
+	    _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+	      return _wayIDs.indexOf(id) === -1;
+	    });
+	    _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
 
-	  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);
-	  }
+	    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 showsLayer(which) {
-	    var layer = layers.layer(which);
+	    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
 
-	    if (layer) {
-	      return layer.enabled();
-	    }
+	    var sharedActions = [];
+	    var sharedNodes = []; // actions for connected nodes
 
-	    return false;
-	  }
+	    var unsharedActions = [];
+	    var unsharedNodes = [];
+	    nodes.forEach(function (node) {
+	      var action = actionDisconnect(node.id).limitWays(_wayIDs);
 
-	  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);
+	      if (action.disabled(context.graph()) !== 'not_connected') {
+	        var count = 0;
 
-	    if (layer) {
-	      layer.enabled(enabled);
+	        for (var i in ways) {
+	          var way = ways[i];
 
-	      if (!enabled && (which === 'osm' || which === 'notes')) {
-	        context.enter(modeBrowse(context));
-	      }
-	    }
-	  }
+	          if (way.nodes.indexOf(node.id) !== -1) {
+	            count += 1;
+	          }
 
-	  function toggleLayer(which) {
-	    setLayer(which, !showsLayer(which));
-	  }
+	          if (count > 1) break;
+	        }
 
-	  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'));
+	        if (count > 1) {
+	          sharedActions.push(action);
+	          sharedNodes.push(node);
+	        } else {
+	          unsharedActions.push(action);
+	          unsharedNodes.push(node);
+	        }
 	      }
 	    });
-	    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
+	    _descriptionID += 'no_points.';
+	    _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
 
-	    li.merge(liEnter).classed('active', function (d) {
-	      return d.layer.enabled();
-	    }).selectAll('input').property('checked', function (d) {
-	      return d.layer.enabled();
-	    });
+	    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;
+	      });
+
+	      if (_wayIDs.length === 1) {
+	        _descriptionID += context.graph().geometry(_wayIDs[0]);
+	      } else {
+	        _descriptionID += 'separate';
+	      }
+	    }
 	  }
 
-	  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
+	  var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
 
-	    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 operation = function operation() {
+	    context.perform(function (graph) {
+	      return _actions.reduce(function (graph, action) {
+	        return action(graph);
+	      }, graph);
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
+	  operation.relatedEntityIds = function () {
+	    if (_vertexIDs.length) {
+	      return _disconnectingWayIds;
+	    }
 
-	  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..
+	    return _disconnectingVertexIds;
+	  };
 
-	    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
+	  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;
+	  };
 
-	    li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
+	  operation.disabled = function () {
+	    var reason;
 
-	    function isVTLayerSelected(d) {
-	      return dataLayer && dataLayer.template() === d.template;
+	    for (var actionIndex in _actions) {
+	      reason = _actions[actionIndex].disabled(context.graph());
+	      if (reason) return reason;
 	    }
 
-	    function selectVTLayer(d3_event, d) {
-	      corePreferences('settings-custom-data-url', d.template);
-
-	      if (dataLayer) {
-	        dataLayer.template(d.template, d.src);
-	        dataLayer.enabled(true);
-	      }
+	    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';
 	    }
-	  }
 
-	  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
+	    return false;
 
-	    ul.exit().remove(); // Enter
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    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', 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 (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    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);
-	  }
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	  function editCustom(d3_event) {
-	    d3_event.preventDefault();
-	    context.container().call(settingsCustomData);
-	  }
+	      return false;
+	    }
+	  };
 
-	  function customChanged(d) {
-	    var dataLayer = layers.layer('data');
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
 
-	    if (d && d.url) {
-	      dataLayer.url(d.url);
-	    } else if (d && d.fileList) {
-	      dataLayer.fileList(d.fileList);
+	    if (disable) {
+	      return _t('operations.disconnect.' + disable);
 	    }
-	  }
 
-	  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 _t('operations.disconnect.description.' + _descriptionID);
+	  };
 
-	  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;
+	  operation.annotation = function () {
+	    return _t('operations.disconnect.annotation.' + _annotationID);
+	  };
+
+	  operation.id = 'disconnect';
+	  operation.keys = [_t('operations.disconnect.key')];
+	  operation.title = _t('operations.disconnect.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiSectionMapFeatures(context) {
-	  var _features = context.features().keys();
+	function operationDowngrade(context, selectedIDs) {
+	  var _affectedFeatureCount = 0;
 
-	  var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+	  var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
-	  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 _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
-	    container = container.merge(containerEnter);
-	    container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	  function downgradeTypeForEntityIDs(entityIds) {
+	    var downgradeType;
+	    _affectedFeatureCount = 0;
+
+	    for (var i in entityIds) {
+	      var entityID = entityIds[i];
+	      var type = downgradeTypeForEntityID(entityID);
+
+	      if (type) {
+	        _affectedFeatureCount += 1;
+
+	        if (downgradeType && type !== downgradeType) {
+	          if (downgradeType !== 'generic' && type !== 'generic') {
+	            downgradeType = 'building_address';
+	          } else {
+	            downgradeType = 'generic';
+	          }
+	        } else {
+	          downgradeType = type;
+	        }
+	      }
+	    }
+
+	    return downgradeType;
 	  }
 
-	  function drawListItems(selection, data, type, name, change, active) {
-	    var items = selection.selectAll('li').data(data); // Exit
+	  function downgradeTypeForEntityID(entityID) {
+	    var graph = context.graph();
+	    var entity = graph.entity(entityID);
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    if (!preset || preset.isFallback()) return null;
 
-	    items.exit().remove(); // Enter
+	    if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+	      return key.match(/^addr:.{1,}/);
+	    })) {
+	      return 'address';
+	    }
 
-	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
-	      var tip = _t.html(name + '.' + d + '.tooltip');
+	    var geometry = entity.geometry(graph);
 
-	      if (autoHiddenFeature(d)) {
-	        var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
-	        tip += '<div>' + msg + '</div>';
-	      }
+	    if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+	      return 'building';
+	    }
 
-	      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
+	    if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+	      return 'generic';
+	    }
 
-	    items = items.merge(enter);
-	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
+	    return null;
 	  }
 
-	  function autoHiddenFeature(d) {
-	    return context.features().autoHidden(d);
-	  }
+	  var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+	  var addressKeysToKeep = ['source'];
 
-	  function showsFeature(d) {
-	    return context.features().enabled(d);
-	  }
+	  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
 
-	  function clickFeature(d3_event, d) {
-	    context.features().toggle(d);
-	  }
+	        for (var key in tags) {
+	          if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-	  function showsLayer(id) {
-	    var layer = context.layers().layer(id);
-	    return layer && layer.enabled();
-	  } // add listeners
+	          if (type === 'building') {
+	            if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	          }
 
+	          if (type !== 'generic') {
+	            if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+	          }
 
-	  context.features().on('change.map_features', section.reRender);
-	  return section;
-	}
+	          delete tags[key];
+	        }
 
-	function uiSectionMapStyleOptions(context) {
-	  var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+	        graph = actionChangeTags(entityID, tags)(graph);
+	      }
 
-	  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');
-	    });
-	  }
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate(); // refresh the select mode to enable the delete operation
 
-	  function drawListItems(selection, data, type, name, change, active) {
-	    var items = selection.selectAll('li').data(data); // Exit
+	    context.enter(modeSelect(context, selectedIDs));
+	  };
 
-	    items.exit().remove(); // Enter
+	  operation.available = function () {
+	    return _downgradeType;
+	  };
 
-	    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
+	  operation.disabled = function () {
+	    if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
+	    }
 
-	    items = items.merge(enter);
-	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
-	  }
+	    return false;
+
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
+	  };
 
-	  function isActiveFill(d) {
-	    return context.map().activeAreaFill() === d;
-	  }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+	  };
 
-	  function toggleHighlightEdited(d3_event) {
-	    d3_event.preventDefault();
-	    context.map().toggleHighlightEdited();
-	  }
+	  operation.annotation = function () {
+	    var suffix;
 
-	  function setFill(d3_event, d) {
-	    context.map().activeAreaFill(d);
-	  }
+	    if (_downgradeType === 'building_address') {
+	      suffix = 'generic';
+	    } else {
+	      suffix = _downgradeType;
+	    }
 
-	  context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
-	  return section;
+	    return _t('operations.downgrade.annotation.' + suffix, {
+	      n: _affectedFeatureCount
+	    });
+	  };
+
+	  operation.id = 'downgrade';
+	  operation.keys = [uiCmd('⌫')];
+	  operation.title = _t('operations.downgrade.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiSectionPhotoOverlays(context) {
-	  var layers = context.layers();
-	  var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+	function operationExtract(context, selectedIDs) {
+	  var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-	  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);
-	  }
+	  var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+	    return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+	  }).filter(Boolean));
 
-	  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();
-	    });
+	  var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-	    function layerSupported(d) {
-	      return d.layer && d.layer.supported();
-	    }
+	  var _extent;
 
-	    function layerEnabled(d) {
-	      return layerSupported(d) && d.layer.enabled();
+	  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;
+
+	    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 null;
 	    }
 
-	    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;
+	    _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	    return actionExtract(entityID, context.projection);
+	  }).filter(Boolean);
 
-	      if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-	        classes += ' indented';
-	      }
+	  var operation = function operation() {
+	    var combinedAction = function combinedAction(graph) {
+	      _actions.forEach(function (action) {
+	        graph = action(graph);
+	      });
 
-	      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);
+	      return graph;
+	    };
+
+	    context.perform(combinedAction, operation.annotation()); // do the extract
+
+	    var extractedNodeIDs = _actions.map(function (action) {
+	      return action.getExtractedNodeID();
 	    });
-	    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);
-	  }
+	    context.enter(modeSelect(context, extractedNodeIDs));
+	  };
 
-	  function drawPhotoTypeItems(selection) {
-	    var data = context.photos().allPhotoTypes();
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  };
 
-	    function typeEnabled(d) {
-	      return context.photos().showsPhotoType(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';
 	    }
 
-	    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);
-	  }
+	    return false;
+	  };
 
-	  function drawDateFilter(selection) {
-	    var data = context.photos().dateFilters();
+	  operation.tooltip = function () {
+	    var disableReason = operation.disabled();
 
-	    function filterEnabled(d) {
-	      return context.photos().dateFilterValue(d);
+	    if (disableReason) {
+	      return _t('operations.extract.' + disableReason + '.' + _amount);
+	    } else {
+	      return _t('operations.extract.description.' + _geometryID + '.' + _amount);
 	    }
+	  };
 
-	    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');
+	  operation.annotation = function () {
+	    return _t('operations.extract.annotation', {
+	      n: selectedIDs.length
 	    });
-	    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);
+	  operation.id = 'extract';
+	  operation.keys = [_t('operations.extract.key')];
+	  operation.title = _t('operations.extract.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
+
+	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;
 	  }
 
-	  function drawUsernameFilter(selection) {
-	    function filterEnabled() {
-	      return context.photos().usernames();
+	  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;
 	    }
 
-	    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);
+	    context.enter(modeSelect(context, resultIDs));
+	  };
 
-	    function usernameValue() {
-	      var usernames = context.photos().usernames();
-	      if (usernames) return usernames.join('; ');
-	      return usernames;
-	    }
-	  }
+	  operation.available = function () {
+	    return selectedIDs.length >= 2;
+	  };
 
-	  function toggleLayer(which) {
-	    setLayer(which, !showsLayer(which));
-	  }
+	  operation.disabled = function () {
+	    var actionDisabled = _action.disabled(context.graph());
 
-	  function showsLayer(which) {
-	    var layer = layers.layer(which);
+	    if (actionDisabled) return actionDisabled;
+	    var osm = context.connection();
 
-	    if (layer) {
-	      return layer.enabled();
+	    if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+	      return 'too_many_vertices';
 	    }
 
 	    return false;
-	  }
+	  };
 
-	  function setLayer(which, enabled) {
-	    var layer = layers.layer(which);
+	  operation.tooltip = function () {
+	    var disabled = operation.disabled();
 
-	    if (layer) {
-	      layer.enabled(enabled);
+	    if (disabled) {
+	      if (disabled === 'conflicting_relations') {
+	        return _t('operations.merge.conflicting_relations');
+	      }
+
+	      if (disabled === 'restriction' || disabled === 'connectivity') {
+	        return _t('operations.merge.damage_relation', {
+	          relation: _mainPresetIndex.item('type/' + disabled).name()
+	        });
+	      }
+
+	      return _t('operations.merge.' + disabled);
 	    }
-	  }
 
-	  context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-	  context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
-	  return section;
-	}
+	    return _t('operations.merge.description');
+	  };
 
-	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;
-	}
+	  operation.annotation = function () {
+	    return _t('operations.merge.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	function uiSectionPrivacy(context) {
-	  var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
+	  operation.id = 'merge';
+	  operation.keys = [_t('operations.merge.key')];
+	  operation.title = _t('operations.merge.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	  var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	function operationPaste(context) {
+	  var _pastePoint;
 
-	  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();
+	  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);
 	    });
-	    thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // 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').html(_t.html('preferences.privacy.privacy_link'));
-	    update();
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	    function update() {
-	      selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
-	    }
-	  }
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	  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;
-	}
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	function uiInit(context) {
-	  var _initCounter = 0;
-	  var _needWidth = {};
+	      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
 
-	  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 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
 
-	      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
+	    context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+	    context.enter(modeSelect(context, newIDs));
+	  };
 
-	      d3_event.preventDefault();
-	    });
-	    var detected = utilDetect(); // only WebKit supports gesture events
+	  operation.point = function (val) {
+	    _pastePoint = val;
+	    return operation;
+	  };
 
-	    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();
-	      });
-	    }
+	  operation.available = function () {
+	    return context.mode().id === 'browse';
+	  };
 
-	    if ('PointerEvent' in window) {
-	      select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
-	        var pointerType = d3_event.pointerType || 'mouse';
+	  operation.disabled = function () {
+	    return !context.copyIDs().length;
+	  };
 
-	        if (_lastPointerType !== pointerType) {
-	          _lastPointerType = pointerType;
-	          container.attr('pointer', pointerType);
-	        }
-	      }, true);
-	    } else {
-	      _lastPointerType = 'mouse';
-	      container.attr('pointer', 'mouse');
-	    }
+	  operation.tooltip = function () {
+	    var oldGraph = context.copyGraph();
+	    var ids = context.copyIDs();
 
-	    container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
+	    if (!ids.length) {
+	      return _t('operations.paste.nothing_copied');
+	    }
 
-	    container.call(uiFullScreen(context));
-	    var map = context.map();
-	    map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+	    return _t('operations.paste.description', {
+	      feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+	      n: ids.length
+	    });
+	  };
 
-	    map.on('hitMinZoom.ui', function () {
-	      ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+	  operation.annotation = function () {
+	    var ids = context.copyIDs();
+	    return _t('operations.paste.annotation', {
+	      n: ids.length
 	    });
-	    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.
+	  operation.id = 'paste';
+	  operation.keys = [uiCmd('⌘V')];
+	  operation.title = _t('operations.paste.title');
+	  return operation;
+	}
 
-	    overMap.append('div').attr('class', 'select-trap').text('t');
-	    overMap.append('div').attr('class', 'spinner').call(uiSpinner(context));
-	    overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Map controls
+	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();
+	  };
 
-	    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)); // Add panes
-	    // This should happen after map is initialized, as some require surface()
+	  function actions(situation) {
+	    return selectedIDs.map(function (entityID) {
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return null;
 
-	    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); // Add absolutely-positioned elements that sit on top of the map
-	    // This should happen after the map is ready (center/zoom)
+	      if (situation === 'toolbar') {
+	        if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+	      }
 
-	    overMap.call(uiMapInMap(context)).call(ui.info).call(uiNotice(context));
-	    overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
-	    .classed('hide', true).call(ui.photoviewer); // Add footer
+	      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);
+	  }
 
-	    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();
+	  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';
+	  }
 
-	    if (apiConnections && apiConnections.length > 1) {
-	      aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
-	    }
+	  operation.available = function (situation) {
+	    return actions(situation).length > 0;
+	  };
+
+	  operation.disabled = function () {
+	    return false;
+	  };
+
+	  operation.tooltip = function () {
+	    return _t('operations.reverse.description.' + reverseTypeID());
+	  };
+
+	  operation.annotation = function () {
+	    var acts = actions();
+	    return _t('operations.reverse.annotation.' + reverseTypeID(), {
+	      n: acts.length
+	    });
+	  };
 
-	    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));
+	  operation.id = 'reverse';
+	  operation.keys = [_t('operations.reverse.key')];
+	  operation.title = _t('operations.reverse.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    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.
+	function operationSplit(context, selectedIDs) {
+	  var _vertexIds = selectedIDs.filter(function (id) {
+	    return context.graph().geometry(id) === 'vertex';
+	  });
 
+	  var _selectedWayIds = selectedIDs.filter(function (id) {
+	    var entity = context.graph().hasEntity(id);
+	    return entity && entity.type === 'way';
+	  });
 
-	    ui.onResize();
-	    map.redrawEnable(true);
-	    ui.hash = behaviorHash(context);
-	    ui.hash();
+	  var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-	    if (!ui.hash.hadHash) {
-	      map.centerZoom([0, 0], 2);
-	    } // Bind events
+	  var _action = actionSplit(_vertexIds);
 
+	  var _ways = [];
+	  var _geometry = 'feature';
+	  var _waysAmount = 'single';
 
-	    window.onbeforeunload = function () {
-	      return context.save();
-	    };
+	  var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-	    window.onunload = function () {
-	      context.history().unlock();
-	    };
+	  if (_isAvailable) {
+	    if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+	    _ways = _action.ways(context.graph());
+	    var geometries = {};
 
-	    select(window).on('resize.editor', function () {
-	      ui.onResize();
+	    _ways.forEach(function (way) {
+	      geometries[way.geometry(context.graph())] = true;
 	    });
-	    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 previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
+	    if (Object.keys(geometries).length === 1) {
+	      _geometry = Object.keys(geometries)[0];
+	    }
 
-	      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
+	    _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+	  }
 
-	      var mode = context.mode();
-	      if (mode && /^draw/.test(mode.id)) return;
-	      var layer = context.layers().layer('osm');
+	  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
 
-	      if (layer) {
-	        layer.enabled(!layer.enabled());
+	    var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+	      // filter out relations that may have had member additions
+	      return context.entity(id).type === 'way';
+	    }));
 
-	        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));
+	    context.enter(modeSelect(context, idsToSelect));
+	  };
 
-	    if (!_initCounter++) {
-	      if (!ui.hash.startWalkthrough) {
-	        context.container().call(uiSplash(context)).call(uiRestore(context));
-	      }
+	  operation.relatedEntityIds = function () {
+	    return _selectedWayIds.length ? [] : _ways.map(function (way) {
+	      return way.id;
+	    });
+	  };
 
-	      context.container().call(ui.shortcuts);
-	    }
+	  operation.available = function () {
+	    return _isAvailable;
+	  };
 
-	    var osm = context.connection();
-	    var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	    if (osm && auth) {
-	      osm.on('authLoading.ui', function () {
-	        context.container().call(auth);
-	      }).on('authDone.ui', function () {
-	        auth.close();
-	      });
+	    if (reason) {
+	      return reason;
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
 	    }
 
-	    _initCounter++;
+	    return false;
+	  };
 
-	    if (ui.hash.startWalkthrough) {
-	      ui.hash.startWalkthrough = false;
-	      context.container().call(uiIntro(context));
-	    }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    if (disable) return _t('operations.split.' + disable);
+	    return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+	  };
 
-	    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);
-	      };
+	  operation.annotation = function () {
+	    return _t('operations.split.annotation.' + _geometry, {
+	      n: _ways.length
+	    });
+	  };
+
+	  operation.icon = function () {
+	    if (_waysAmount === 'multiple') {
+	      return '#iD-operation-split-multiple';
+	    } else {
+	      return '#iD-operation-split';
 	    }
-	  }
+	  };
 
-	  var ui = {};
+	  operation.id = 'split';
+	  operation.keys = [_t('operations.split.key')];
+	  operation.title = _t('operations.split.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	  var _loadPromise; // renders the iD interface into the container node
+	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';
+	  });
 
-	  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.
+	  var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
+	  var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-	  ui.restart = function () {
-	    context.keybinding().clear();
-	    _loadPromise = null;
-	    context.container().selectAll('*').remove();
-	    ui.ensureLoaded();
-	  };
+	  var _coords = _nodes.map(function (n) {
+	    return n.loc;
+	  });
 
-	  ui.lastPointerType = function () {
-	    return _lastPointerType;
-	  };
+	  var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-	  ui.svgDefs = svgDefs(context);
-	  ui.flash = uiFlash(context);
-	  ui.sidebar = uiSidebar(context);
-	  ui.photoviewer = uiPhotoviewer(context);
-	  ui.shortcuts = uiShortcuts(context);
+	  var _action = chooseAction();
 
-	  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.
+	  var _geometry;
 
-	    var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-	    utilGetDimensions(context.container().select('.sidebar'), true);
+	  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 = [];
 
-	    if (withPan !== undefined) {
-	      map.redrawEnable(false);
-	      map.pan(withPan);
-	      map.redrawEnable(true);
-	    }
+	      for (var i = 0; i < selectedIDs.length; i++) {
+	        var entity = context.entity(selectedIDs[i]);
 
-	    map.dimensions(mapDimensions);
-	    ui.photoviewer.onMapResize(); // check if header or footer have overflowed
+	        if (entity.type === 'node') {
+	          continue;
+	        } else if (entity.type !== 'way' || entity.isClosed()) {
+	          return null; // exit early, can't straighten these
+	        }
 
-	    ui.checkOverflow('.top-toolbar');
-	    ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
+	        startNodeIDs.push(entity.first());
+	        endNodeIDs.push(entity.last());
+	      } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-	    var resizeWindowEvent = document.createEvent('Event');
-	    resizeWindowEvent.initEvent('resizeWindow', true, true);
-	    document.dispatchEvent(resizeWindowEvent);
-	  }; // Call checkOverflow when resizing or whenever the contents change.
 
+	      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)
 
-	  ui.checkOverflow = function (selector, reset) {
-	    if (reset) {
-	      delete _needWidth[selector];
-	    }
+	      if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-	    var element = select(selector);
-	    var scrollWidth = element.property('scrollWidth');
-	    var clientWidth = element.property('clientWidth');
-	    var needed = _needWidth[selector] || scrollWidth;
+	      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
 
-	    if (scrollWidth > clientWidth) {
-	      // overflow happening
-	      element.classed('narrow', true);
+	      if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-	      if (!_needWidth[selector]) {
-	        _needWidth[selector] = scrollWidth;
+	      if (_nodeIDs.length) {
+	        // If we're only straightenting between two points, we only need that extent visible
+	        _extent = utilTotalExtent(_nodeIDs, context.graph());
 	      }
-	    } else if (scrollWidth >= needed) {
-	      element.classed('narrow', false);
-	    }
-	  };
-
-	  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);
-
-	    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);
 
-	      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);
-	      });
+	      _geometry = 'line';
+	      return actionStraightenWay(selectedIDs, context.projection);
 	    }
-	  };
 
-	  var _editMenu = uiEditMenu(context);
+	    return null;
+	  }
 
-	  ui.editMenu = function () {
-	    return _editMenu;
-	  };
+	  function operation() {
+	    if (!_action) return;
+	    context.perform(_action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  }
 
-	  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
+	  operation.available = function () {
+	    return Boolean(_action);
+	  };
 
-	    if (!context.map().editableDataEnabled()) return;
-	    var surfaceNode = context.surface().node();
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	    if (surfaceNode.focus) {
-	      // FF doesn't support it
-	      // focus the surface or else clicking off the menu may not trigger modeBrowse
-	      surfaceNode.focus();
+	    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';
 	    }
 
-	    operations.forEach(function (operation) {
-	      if (operation.point) operation.point(anchorPoint);
-	    });
+	    return false;
 
-	    _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    context.map().supersurface.call(_editMenu);
-	  };
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	  ui.closeEditMenu = function () {
-	    // remove any existing menu no matter how it was added
-	    context.map().supersurface.select('.edit-menu').remove();
+	      return false;
+	    }
 	  };
 
-	  var _saveLoading = select(null);
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+	  };
 
-	  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();
+	  operation.annotation = function () {
+	    return _t('operations.straighten.annotation.' + _geometry, {
+	      n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+	    });
+	  };
 
-	    _saveLoading = select(null);
-	  });
-	  return ui;
+	  operation.id = 'straighten';
+	  operation.keys = [_t('operations.straighten.key')];
+	  operation.title = _t('operations.straighten.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function coreContext() {
-	  var _this = this;
-
-	  var dispatch$1 = dispatch('enter', 'exit', 'change');
-	  var context = utilRebind({}, dispatch$1, 'on');
-
-	  var _deferred = new Set();
+	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
+	});
 
-	  context.version = '2.19.1';
-	  context.privacyVersion = '20200407'; // iD will alter the hash so cache the parameters intended to setup the session
+	function modeSelect(context, selectedIDs) {
+	  var mode = {
+	    id: 'select',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select');
 
-	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
-	  context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
-	  /* Changeset */
-	  // An osmChangeset object. Not loaded until needed.
+	  var _breatheBehavior = behaviorBreathe();
 
-	  context.changeset = null;
-	  var _defaultChangesetComment = context.initialHashParams.comment;
-	  var _defaultChangesetSource = context.initialHashParams.source;
-	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
+	  var _modeDragNode = modeDragNode(context);
 
-	  context.defaultChangesetComment = function (val) {
-	    if (!arguments.length) return _defaultChangesetComment;
-	    _defaultChangesetComment = val;
-	    return context;
-	  };
+	  var _selectBehavior;
 
-	  context.defaultChangesetSource = function (val) {
-	    if (!arguments.length) return _defaultChangesetSource;
-	    _defaultChangesetSource = val;
-	    return 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.
 
-	  context.defaultChangesetHashtags = function (val) {
-	    if (!arguments.length) return _defaultChangesetHashtags;
-	    _defaultChangesetHashtags = val;
-	    return context;
-	  };
-	  /* Document title */
+	  var _focusedParentWayId;
 
-	  /* (typically shown as the label for the browser window/tab) */
-	  // If true, iD will update the title based on what the user is doing
+	  var _focusedVertexIds;
 
+	  function singular() {
+	    if (selectedIDs && selectedIDs.length === 1) {
+	      return context.hasEntity(selectedIDs[0]);
+	    }
+	  }
 
-	  var _setsDocumentTitle = true;
+	  function selectedEntities() {
+	    return selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
+	  }
 
-	  context.setsDocumentTitle = function (val) {
-	    if (!arguments.length) return _setsDocumentTitle;
-	    _setsDocumentTitle = val;
-	    return context;
-	  }; // The part of the title that is always the same
+	  function checkSelectedIDs() {
+	    var ids = [];
 
+	    if (Array.isArray(selectedIDs)) {
+	      ids = selectedIDs.filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	    }
 
-	  var _documentTitleBase = document.title;
+	    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;
+	    }
 
-	  context.documentTitleBase = function (val) {
-	    if (!arguments.length) return _documentTitleBase;
-	    _documentTitleBase = val;
-	    return context;
-	  };
-	  /* User interface and keybinding */
+	    selectedIDs = ids;
+	    return true;
+	  } // find the parent ways for nextVertex, previousVertex, and selectParent
 
 
-	  var _ui;
+	  function parentWaysIdsOfSelection(onlyCommonParents) {
+	    var graph = context.graph();
+	    var parents = [];
 
-	  context.ui = function () {
-	    return _ui;
-	  };
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
-	  context.lastPointerType = function () {
-	    return _ui.lastPointerType();
-	  };
+	      if (!entity || entity.geometry(graph) !== 'vertex') {
+	        return []; // selection includes some non-vertices
+	      }
 
-	  var _keybinding = utilKeybinding('context');
+	      var currParents = graph.parentWays(entity).map(function (w) {
+	        return w.id;
+	      });
 
-	  context.keybinding = function () {
-	    return _keybinding;
-	  };
+	      if (!parents.length) {
+	        parents = currParents;
+	        continue;
+	      }
 
-	  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`
+	      parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);
 
-	  var _connection = services.osm;
+	      if (!parents.length) {
+	        return [];
+	      }
+	    }
 
-	  var _history;
+	    return parents;
+	  } // find the child nodes for selected ways
 
-	  var _validator;
 
-	  var _uploader;
+	  function childNodeIdsOfSelection(onlyCommon) {
+	    var graph = context.graph();
+	    var childs = [];
 
-	  context.connection = function () {
-	    return _connection;
-	  };
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
-	  context.history = function () {
-	    return _history;
-	  };
+	      if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+	        return []; // selection includes non-area/non-line
+	      }
 
-	  context.validator = function () {
-	    return _validator;
-	  };
+	      var currChilds = graph.childNodes(entity).map(function (node) {
+	        return node.id;
+	      });
 
-	  context.uploader = function () {
-	    return _uploader;
-	  };
-	  /* Connection */
+	      if (!childs.length) {
+	        childs = currChilds;
+	        continue;
+	      }
 
+	      childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);
 
-	  context.preauth = function (options) {
-	    if (_connection) {
-	      _connection["switch"](options);
+	      if (!childs.length) {
+	        return [];
+	      }
 	    }
 
-	    return context;
-	  };
-	  /* connection options for source switcher (optional) */
+	    return childs;
+	  }
 
+	  function checkFocusedParent() {
+	    if (_focusedParentWayId) {
+	      var parents = parentWaysIdsOfSelection(true);
+	      if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+	    }
+	  }
 
-	  var _apiConnections;
+	  function parentWayIdForVertexNavigation() {
+	    var parentIds = parentWaysIdsOfSelection(true);
 
-	  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
+	    if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+	      // prefer the previously seen parent
+	      return _focusedParentWayId;
+	    }
 
+	    return parentIds.length ? parentIds[0] : null;
+	  }
 
-	  context.locale = function (locale) {
-	    if (!arguments.length) return _mainLocalizer.localeCode();
-	    _mainLocalizer.preferredLocaleCodes(locale);
-	    return context;
+	  mode.selectedIDs = function (val) {
+	    if (!arguments.length) return selectedIDs;
+	    selectedIDs = val;
+	    return mode;
 	  };
 
-	  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();
-	          }
-	        }
+	  mode.zoomToSelected = function () {
+	    context.map().zoomToEase(selectedEntities());
+	  };
 
-	        if (typeof callback === 'function') {
-	          callback(err);
-	        }
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	        return;
-	      } else if (_connection && _connection.getConnectionId() !== cid) {
-	        if (typeof callback === 'function') {
-	          callback({
-	            message: 'Connection Switched',
-	            status: -1
-	          });
-	        }
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
-	        return;
-	      } else {
-	        _history.merge(result.data, result.extent);
+	  mode.follow = function (val) {
+	    if (!arguments.length) return _follow;
+	    _follow = val;
+	    return mode;
+	  };
 
-	        if (typeof callback === 'function') {
-	          callback(err, result);
-	        }
+	  function loadOperations() {
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	        return;
+	    _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();
+	    });
+
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.install(operation.behavior);
 	      }
-	    };
+	    }); // remove any displayed menu
+
+
+	    context.ui().closeEditMenu();
 	  }
 
-	  context.loadTiles = function (projection, callback) {
-	    var handle = window.requestIdleCallback(function () {
-	      _deferred["delete"](handle);
+	  mode.operations = function () {
+	    return _operations;
+	  };
 
-	      if (_connection && context.editableDataEnabled()) {
-	        var cid = _connection.getConnectionId();
+	  mode.enter = function () {
+	    if (!checkSelectedIDs()) return;
+	    context.features().forceVisible(selectedIDs);
 
-	        _connection.loadTiles(projection, afterLoad(cid, callback));
-	      }
-	    });
+	    _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-	    _deferred.add(handle);
-	  };
+	    loadOperations();
 
-	  context.loadTileAtLoc = function (loc, callback) {
-	    var handle = window.requestIdleCallback(function () {
-	      _deferred["delete"](handle);
+	    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 (_connection && context.editableDataEnabled()) {
-	        var cid = _connection.getConnectionId();
+	    _behaviors.forEach(context.install);
 
-	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
-	      }
+	    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
+
+	      selectElements();
+	    }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+	    context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+	      selectElements();
+
+	      _breatheBehavior.restartIfNeeded(context.surface());
 	    });
+	    context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+	    selectElements();
 
-	    _deferred.add(handle);
-	  };
+	    if (_follow) {
+	      var extent = geoExtent();
+	      var graph = context.graph();
+	      selectedIDs.forEach(function (id) {
+	        var entity = context.entity(id);
 
-	  context.loadEntity = function (entityID, callback) {
-	    if (_connection) {
-	      var cid = _connection.getConnectionId();
+	        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
 
-	      _connection.loadEntity(entityID, afterLoad(cid, callback));
+	      _follow = false;
 	    }
-	  };
 
-	  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;
-	        });
+	    function nudgeSelection(delta) {
+	      return function () {
+	        // prevent nudging during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var moveOp = operationMove(context, selectedIDs);
 
-	        if (entity) {
-	          _map.zoomTo(entity);
+	        if (moveOp.disabled()) {
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
+	        } else {
+	          context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+	          context.validator().validate();
 	        }
-	      });
+	      };
 	    }
 
-	    _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 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
 
-	    context.on('enter.zoomToEntity', function () {
-	      if (_mode.id !== 'browse') {
-	        _map.on('drawn.zoomToEntity', null);
+	        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.
 
-	        context.on('enter.zoomToEntity', null);
-	      }
-	    });
-	  };
+	        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 _minEditableZoom = 16;
+	          return false;
 
-	  context.minEditableZoom = function (val) {
-	    if (!arguments.length) return _minEditableZoom;
-	    _minEditableZoom = val;
+	          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);
+	          }
 
-	    if (_connection) {
-	      _connection.tileZoom(val);
-	    }
+	          function someMissing() {
+	            if (context.inIntro()) return false;
+	            var osm = context.connection();
 
-	    return context;
-	  }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+	            if (osm) {
+	              var missing = nodes.filter(function (n) {
+	                return !osm.isDataLoaded(n.loc);
+	              });
 
+	              if (missing.length) {
+	                missing.forEach(function (loc) {
+	                  context.loadTileAtLoc(loc);
+	                });
+	                return true;
+	              }
+	            }
 
-	  context.maxCharsForTagKey = function () {
-	    return 255;
-	  };
+	            return false;
+	          }
 
-	  context.maxCharsForTagValue = function () {
-	    return 255;
-	  };
+	          function incompleteRelation(id) {
+	            var entity = context.entity(id);
+	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	          }
+	        }
 
-	  context.maxCharsForRelationRole = function () {
-	    return 255;
-	  };
+	        var disabled = scalingDisabled();
 
-	  function cleanOsmString(val, maxChars) {
-	    // be lenient with input
-	    if (val === undefined || val === null) {
-	      val = '';
-	    } else {
-	      val = val.toString();
-	    } // remove whitespace
+	        if (disabled) {
+	          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	          context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t.html('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();
+	        }
+	      };
+	    }
 
+	    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;
 
-	    val = val.trim(); // use the canonical form of the string
+	      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();
+	      }
+	    }
 
-	    if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+	    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
 
-	    return utilUnicodeCharsTruncated(val, maxChars);
-	  }
+	      checkFocusedParent();
 
-	  context.cleanTagKey = function (val) {
-	    return cleanOsmString(val, context.maxCharsForTagKey());
-	  };
+	      if (_focusedParentWayId) {
+	        surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+	      }
 
-	  context.cleanTagValue = function (val) {
-	    return cleanOsmString(val, context.maxCharsForTagValue());
-	  };
+	      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);
+	      }
+	    }
 
-	  context.cleanRelationRole = function (val) {
-	    return cleanOsmString(val, context.maxCharsForRelationRole());
-	  };
-	  /* History */
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
 
+	    function firstVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parentId = parentWayIdForVertexNavigation();
+	      var way;
 
-	  var _inIntro = false;
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parentId) {
+	        way = context.entity(parentId);
+	      }
 
-	  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
+	      _focusedParentWayId = way && way.id;
 
+	      if (way) {
+	        context.enter(mode.selectedIDs([way.first()]).follow(true));
+	      }
+	    }
 
-	  context.save = function () {
-	    // no history save, no message onbeforeunload
-	    if (_inIntro || context.container().select('.modal').size()) return;
-	    var canSave;
+	    function lastVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parentId = parentWayIdForVertexNavigation();
+	      var way;
 
-	    if (_mode && _mode.id === 'save') {
-	      canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parentId) {
+	        way = context.entity(parentId);
+	      }
 
-	      if (services.osm && services.osm.isChangesetInflight()) {
-	        _history.clearSaved();
+	      _focusedParentWayId = way && way.id;
 
-	        return;
+	      if (way) {
+	        context.enter(mode.selectedIDs([way.last()]).follow(true));
 	      }
-	    } else {
-	      canSave = context.selectedIDs().every(function (id) {
-	        var entity = context.hasEntity(id);
-	        return entity && !entity.isDegenerate();
-	      });
 	    }
 
-	    if (canSave) {
-	      _history.save();
-	    }
+	    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 (_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).
+	      if (curr > 0) {
+	        index = curr - 1;
+	      } else if (way.isClosed()) {
+	        index = length - 2;
+	      }
 
+	      if (index !== -1) {
+	        context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	  context.debouncedSave = debounce(context.save, 350);
+	    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;
 
-	  function withDebouncedSave(fn) {
-	    return function () {
-	      var result = fn.apply(_history, arguments);
-	      context.debouncedSave();
-	      return result;
-	    };
-	  }
-	  /* Graph */
+	      if (curr < length - 1) {
+	        index = curr + 1;
+	      } else if (way.isClosed()) {
+	        index = 0;
+	      }
 
+	      if (index !== -1) {
+	        context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	  context.hasEntity = function (id) {
-	    return _history.graph().hasEntity(id);
-	  };
+	    function focusNextParent(d3_event) {
+	      d3_event.preventDefault();
+	      var parents = parentWaysIdsOfSelection(true);
+	      if (!parents || parents.length < 2) return;
+	      var index = parents.indexOf(_focusedParentWayId);
 
-	  context.entity = function (id) {
-	    return _history.graph().entity(id);
-	  };
-	  /* Modes */
+	      if (index < 0 || index > parents.length - 2) {
+	        _focusedParentWayId = parents[0];
+	      } else {
+	        _focusedParentWayId = parents[index + 1];
+	      }
 
+	      var surface = context.surface();
+	      surface.selectAll('.related').classed('related', false);
 
-	  var _mode;
+	      if (_focusedParentWayId) {
+	        surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+	      }
+	    }
 
-	  context.mode = function () {
-	    return _mode;
-	  };
+	    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
 
-	  context.enter = function (newMode) {
-	    if (_mode) {
-	      _mode.exit();
+	      _focusedVertexIds = currentSelectedIds;
+	    }
 
-	      dispatch$1.call('exit', _this, _mode);
+	    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 = newMode;
+	  mode.exit = function () {
+	    // we could enter the mode multiple times but it's only new the first time
+	    _newFeature = false;
+	    _focusedVertexIds = null;
 
-	    _mode.enter();
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	    dispatch$1.call('enter', _this, _mode);
-	  };
+	    _operations = [];
 
-	  context.selectedIDs = function () {
-	    return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
-	  };
+	    _behaviors.forEach(context.uninstall);
 
-	  context.activeID = function () {
-	    return _mode && _mode.activeID && _mode.activeID();
-	  };
+	    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();
 
-	  var _selectedNoteID;
+	    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.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
+	  return mode;
+	}
 
+	function behaviorLasso(context) {
+	  // use pointer events on supported platforms; fallback to mouse events
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  var _selectedErrorID;
+	  var behavior = function behavior(selection) {
+	    var lasso;
 
-	  context.selectedErrorID = function (errorID) {
-	    if (!arguments.length) return _selectedErrorID;
-	    _selectedErrorID = errorID;
-	    return context;
-	  };
-	  /* Behaviors */
+	    function pointerdown(d3_event) {
+	      var button = 0; // left
 
+	      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();
+	      }
+	    }
 
-	  context.install = function (behavior) {
-	    return context.surface().call(behavior);
-	  };
+	    function pointermove() {
+	      if (!lasso) {
+	        lasso = uiLasso(context);
+	        context.surface().call(lasso);
+	      }
 
-	  context.uninstall = function (behavior) {
-	    return context.surface().call(behavior.off);
-	  };
-	  /* Copy/Paste */
+	      lasso.p(context.map().mouse());
+	    }
 
+	    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])]];
+	    }
 
-	  var _copyGraph;
+	    function lassoed() {
+	      if (!lasso) return [];
+	      var graph = context.graph();
+	      var limitToNodes;
 
-	  context.copyGraph = function () {
-	    return _copyGraph;
-	  };
+	      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 _copyIDs = [];
+	      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
 
-	  context.copyIDs = function (val) {
-	    if (!arguments.length) return _copyIDs;
-	    _copyIDs = val;
-	    _copyGraph = _history.graph();
-	    return context;
-	  };
+	      intersects.sort(function (node1, node2) {
+	        var parents1 = graph.parentWays(node1);
+	        var parents2 = graph.parentWays(node2);
 
-	  var _copyLonLat;
+	        if (parents1.length && parents2.length) {
+	          // both nodes are vertices
+	          var sharedParents = utilArrayIntersection(parents1, parents2);
 
-	  context.copyLonLat = function (val) {
-	    if (!arguments.length) return _copyLonLat;
-	    _copyLonLat = val;
-	    return context;
-	  };
-	  /* Background */
+	          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
 
-	  var _background;
 
-	  context.background = function () {
-	    return _background;
-	  };
-	  /* Features */
+	        return node1.loc[0] - node2.loc[0];
+	      });
+	      return intersects.map(function (entity) {
+	        return entity.id;
+	      });
+	    }
 
+	    function pointerup() {
+	      select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+	      if (!lasso) return;
+	      var ids = lassoed();
+	      lasso.close();
 
-	  var _features;
+	      if (ids.length) {
+	        context.enter(modeSelect(context, ids));
+	      }
+	    }
 
-	  context.features = function () {
-	    return _features;
+	    selection.on(_pointerPrefix + 'down.lasso', pointerdown);
 	  };
 
-	  context.hasHiddenConnections = function (id) {
-	    var graph = _history.graph();
-
-	    var entity = graph.entity(id);
-	    return _features.hasHiddenConnections(entity, graph);
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.lasso', null);
 	  };
-	  /* Photos */
-
 
-	  var _photos;
+	  return behavior;
+	}
 
-	  context.photos = function () {
-	    return _photos;
+	function modeBrowse(context) {
+	  var mode = {
+	    button: 'browse',
+	    id: 'browse',
+	    title: _t('modes.browse.title'),
+	    description: _t('modes.browse.description')
 	  };
-	  /* Map */
+	  var sidebar;
 
+	  var _selectBehavior;
 
-	  var _map;
+	  var _behaviors = [];
 
-	  context.map = function () {
-	    return _map;
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
 	  };
 
-	  context.layers = function () {
-	    return _map.layers();
-	  };
+	  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];
+	    }
 
-	  context.surface = function () {
-	    return _map.surface;
-	  };
+	    _behaviors.forEach(context.install); // Get focus on the body.
 
-	  context.editableDataEnabled = function () {
-	    return _map.editableDataEnabled();
-	  };
 
-	  context.surfaceRect = function () {
-	    return _map.surface.node().getBoundingClientRect();
-	  };
+	    if (document.activeElement && document.activeElement.blur) {
+	      document.activeElement.blur();
+	    }
 
-	  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.show(sidebar);
+	    } else {
+	      context.ui().sidebar.select(null);
+	    }
 	  };
-	  /* Debug */
 
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
 
-	  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
-
-	  };
+	    _behaviors.forEach(context.uninstall);
 
-	  context.debugFlags = function () {
-	    return _debugFlags;
+	    if (sidebar) {
+	      context.ui().sidebar.hide();
+	    }
 	  };
 
-	  context.getDebug = function (flag) {
-	    return flag && _debugFlags[flag];
+	  mode.sidebar = function (_) {
+	    if (!arguments.length) return sidebar;
+	    sidebar = _;
+	    return mode;
 	  };
 
-	  context.setDebug = function (flag, val) {
-	    if (arguments.length === 1) val = true;
-	    _debugFlags[flag] = val;
-	    dispatch$1.call('change');
-	    return context;
+	  mode.operations = function () {
+	    return [operationPaste(context)];
 	  };
-	  /* Container */
-
-
-	  var _container = select(null);
 
-	  context.container = function (val) {
-	    if (!arguments.length) return _container;
-	    _container = val;
+	  return mode;
+	}
 
-	    _container.classed('ideditor', true);
+	function behaviorAddWay(context) {
+	  var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
+	  var draw = behaviorDraw(context);
 
-	    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);
+	  }
 
-	  context.containerNode = function (val) {
-	    if (!arguments.length) return context.container().node();
-	    context.container(select(val));
-	    return context;
+	  behavior.off = function (surface) {
+	    surface.call(draw.off);
 	  };
 
-	  var _embed;
-
-	  context.embed = function (val) {
-	    if (!arguments.length) return _embed;
-	    _embed = val;
-	    return context;
+	  behavior.cancel = function () {
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.enter(modeBrowse(context));
 	  };
-	  /* Assets */
 
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	  var _assetPath = '';
+	function behaviorHash(context) {
+	  // cached window.location.hash
+	  var _cachedHash = null; // allowable latitude range
 
-	  context.assetPath = function (val) {
-	    if (!arguments.length) return _assetPath;
-	    _assetPath = val;
-	    _mainFileFetcher.assetPath(val);
-	    return context;
-	  };
+	  var _latitudeLimit = 90 - 1e-8;
 
-	  var _assetMap = {};
+	  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);
+	    });
 
-	  context.assetMap = function (val) {
-	    if (!arguments.length) return _assetMap;
-	    _assetMap = val;
-	    _mainFileFetcher.assetMap(val);
-	    return context;
-	  };
+	    if (selected.length) {
+	      newParams.id = selected.join(',');
+	    }
 
-	  context.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) return val;
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
-	  };
+	    newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	    return Object.assign(oldParams, newParams);
+	  }
 
-	  context.imagePath = function (val) {
-	    return context.asset("img/".concat(val));
-	  };
-	  /* reset (aka flush) */
+	  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);
+	    });
 
-	  context.reset = context.flush = function () {
-	    context.debouncedSave.cancel();
-	    Array.from(_deferred).forEach(function (handle) {
-	      window.cancelIdleCallback(handle);
+	    if (selected.length) {
+	      var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
 
-	      _deferred["delete"](handle);
-	    });
-	    Object.values(services).forEach(function (service) {
-	      if (service && typeof service.reset === 'function') {
-	        service.reset(context);
+	      if (selected.length > 1) {
+	        contextual = _t('title.labeled_and_more', {
+	          labeled: firstLabel,
+	          count: selected.length - 1
+	        });
+	      } else {
+	        contextual = firstLabel;
 	      }
-	    });
-	    context.changeset = null;
 
-	    _validator.reset();
+	      titleID = 'context';
+	    }
 
-	    _features.reset();
+	    if (includeChangeCount) {
+	      changeCount = context.history().difference().summary().length;
 
-	    _history.reset();
+	      if (changeCount > 0) {
+	        titleID = contextual ? 'changes_context' : 'changes';
+	      }
+	    }
 
-	    _uploader.reset(); // don't leave stale state in the inspector
+	    if (titleID) {
+	      return _t('title.format.' + titleID, {
+	        changes: changeCount,
+	        base: baseTitle,
+	        context: contextual
+	      });
+	    }
 
+	    return baseTitle;
+	  }
 
-	    context.container().select('.inspector-wrap *').remove();
-	    return context;
-	  };
-	  /* Projections */
+	  function updateTitle(includeChangeCount) {
+	    if (!context.setsDocumentTitle()) return;
+	    var newTitle = computedTitle(includeChangeCount);
 
+	    if (document.title !== newTitle) {
+	      document.title = newTitle;
+	    }
+	  }
 
-	  context.projection = geoRawMercator();
-	  context.curtainProjection = geoRawMercator();
-	  /* Init */
+	  function updateHashIfNeeded() {
+	    if (context.inIntro()) return;
+	    var latestHash = computedHash();
 
-	  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.
+	    if (_cachedHash !== latestHash) {
+	      _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+	      // though unavoidably creating a browser history entry
 
-	    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.
+	      window.history.replaceState(null, computedTitle(false
+	      /* includeChangeCount */
+	      ), latestHash); // set the title we want displayed for the browser tab/window
 
+	      updateTitle(true
+	      /* includeChangeCount */
+	      );
+	    }
+	  }
 
-	    function initializeDependents() {
-	      if (context.initialHashParams.presets) {
-	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
-	      }
+	  var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-	      if (context.initialHashParams.locale) {
-	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
-	      } // kick off some async work
+	  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);
 
-	      _mainLocalizer.ensureLoaded();
+	    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]);
 
-	      _background.ensureLoaded();
+	      if (q.id && mode) {
+	        var ids = q.id.split(',').filter(function (id) {
+	          return context.hasEntity(id);
+	        });
 
-	      _mainPresetIndex.ensureLoaded();
-	      Object.values(services).forEach(function (service) {
-	        if (service && typeof service.init === 'function') {
-	          service.init();
+	        if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+	          context.enter(modeSelect(context, ids));
+	          return;
 	        }
-	      });
+	      }
 
-	      _map.init();
+	      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
 
-	      _validator.init();
+	      if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
+	        context.enter(modeBrowse(context));
+	        return;
+	      }
+	    }
+	  }
 
-	      _features.init();
+	  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 (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 (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 (q.walkthrough === 'true') {
+	        behavior.startWalkthrough = true;
+	      }
 
-	      if (!context.container().empty()) {
-	        _ui.ensureLoaded().then(function () {
-	          _photos.init();
-	        });
+	      if (q.map) {
+	        behavior.hadHash = true;
 	      }
+
+	      hashchange();
+	      updateTitle(false);
 	    }
+	  }
+
+	  behavior.off = function () {
+	    _throttledUpdate.cancel();
+
+	    _throttledUpdateTitle.cancel();
+
+	    context.map().on('move.behaviorHash', null);
+	    context.on('enter.behaviorHash', null);
+	    select(window).on('hashchange.behaviorHash', null);
+	    window.location.hash = '';
 	  };
 
-	  return context;
+	  return behavior;
 	}
 
 	// This is only done in testing because of the performance penalty.
 
 	var debug = false; // Reexport just what our tests use, see #4379
 	var d3 = {
-	  dispatch: dispatch,
+	  dispatch: dispatch$8,
 	  geoMercator: mercator,
 	  geoProjection: projection,
 	  polygonArea: d3_polygonArea,
@@ -98865,6 +123447,8 @@
 		coreLocalizer: coreLocalizer,
 		t: _t,
 		localizer: _mainLocalizer,
+		coreLocations: coreLocations,
+		locationManager: _mainLocations,
 		prefs: corePreferences,
 		coreTree: coreTree,
 		coreUploader: coreUploader,
@@ -98995,7 +123579,8 @@
 		serviceMapillary: serviceMapillary,
 		serviceMapRules: serviceMapRules,
 		serviceNominatim: serviceNominatim,
-		serviceOpenstreetcam: serviceOpenstreetcam,
+		serviceNsi: serviceNsi,
+		serviceKartaview: serviceKartaview,
 		serviceOsm: serviceOsm,
 		serviceOsmWikibase: serviceOsmWikibase,
 		serviceStreetside: serviceStreetside,
@@ -99018,7 +123603,7 @@
 		svgMidpoints: svgMidpoints,
 		svgNotes: svgNotes,
 		svgMarkerSegments: svgMarkerSegments,
-		svgOpenstreetcamImages: svgOpenstreetcamImages,
+		svgKartaviewImages: svgKartaviewImages,
 		svgOsm: svgOsm,
 		svgPassiveVertex: svgPassiveVertex,
 		svgPath: svgPath,
@@ -99052,7 +123637,8 @@
 		uiFieldCycleway: uiFieldCycleway,
 		uiFieldLanes: uiFieldLanes,
 		uiFieldLocalized: uiFieldLocalized,
-		uiFieldMaxspeed: uiFieldMaxspeed,
+		uiFieldRoadheight: uiFieldRoadheight,
+		uiFieldRoadspeed: uiFieldRoadspeed,
 		uiFieldStructureRadio: uiFieldRadio,
 		uiFieldRadio: uiFieldRadio,
 		uiFieldRestrictions: uiFieldRestrictions,
@@ -99178,9 +123764,10 @@
 		utilDisplayLabel: utilDisplayLabel,
 		utilEntityRoot: utilEntityRoot,
 		utilEditDistance: utilEditDistance,
-		utilEntitySelector: utilEntitySelector,
+		utilEntityAndDeepMemberIDs: utilEntityAndDeepMemberIDs,
 		utilEntityOrMemberSelector: utilEntityOrMemberSelector,
 		utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,
+		utilEntitySelector: utilEntitySelector,
 		utilFastMouse: utilFastMouse,
 		utilFunctor: utilFunctor,
 		utilGetAllNodes: utilGetAllNodes,
@@ -99190,6 +123777,8 @@
 		utilKeybinding: utilKeybinding,
 		utilNoAuto: utilNoAuto,
 		utilObjectOmit: utilObjectOmit,
+		utilCompareIDs: utilCompareIDs,
+		utilOldestID: utilOldestID,
 		utilPrefixCSSProperty: utilPrefixCSSProperty,
 		utilPrefixDOMProperty: utilPrefixDOMProperty,
 		utilQsString: utilQsString,